Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 4738 insertions, 0 deletions

diff --git a/kernel/drivers/scsi/megaraid.c b/kernel/drivers/scsi/megaraid.c
new file mode 100644
index 000000000..bc7b34c02
--- /dev/null
+++ b/kernel/drivers/scsi/megaraid.c
@@ -0,0 +1,4738 @@
+/*
+ *
+ *			Linux MegaRAID device driver
+ *
+ * Copyright (c) 2002  LSI Logic Corporation.
+ *
+ *	   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 of the License, or (at your option) any later version.
+ *
+ * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
+ *	  - fixes
+ *	  - speed-ups (list handling fixes, issued_list, optimizations.)
+ *	  - lots of cleanups.
+ *
+ * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
+ *	  - new-style, hotplug-aware pci probing and scsi registration
+ *
+ * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
+ * 						<Seokmann.Ju@lsil.com>
+ *
+ * Description: Linux device driver for LSI Logic MegaRAID controller
+ *
+ * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
+ *					518, 520, 531, 532
+ *
+ * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
+ * and others. Please send updates to the mailing list
+ * linux-scsi@vger.kernel.org .
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/blkdev.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/reboot.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <scsi/scsicam.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+
+#include "megaraid.h"
+
+#define MEGARAID_MODULE_VERSION "2.00.4"
+
+MODULE_AUTHOR ("sju@lsil.com");
+MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
+MODULE_LICENSE ("GPL");
+MODULE_VERSION(MEGARAID_MODULE_VERSION);
+
+static DEFINE_MUTEX(megadev_mutex);
+static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
+module_param(max_cmd_per_lun, uint, 0);
+MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
+
+static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
+module_param(max_sectors_per_io, ushort, 0);
+MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
+
+
+static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
+module_param(max_mbox_busy_wait, ushort, 0);
+MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
+
+#define RDINDOOR(adapter)	readl((adapter)->mmio_base + 0x20)
+#define RDOUTDOOR(adapter)	readl((adapter)->mmio_base + 0x2C)
+#define WRINDOOR(adapter,value)	 writel(value, (adapter)->mmio_base + 0x20)
+#define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
+
+/*
+ * Global variables
+ */
+
+static int hba_count;
+static adapter_t *hba_soft_state[MAX_CONTROLLERS];
+static struct proc_dir_entry *mega_proc_dir_entry;
+
+/* For controller re-ordering */
+static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
+
+static long
+megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
+
+/*
+ * The File Operations structure for the serial/ioctl interface of the driver
+ */
+static const struct file_operations megadev_fops = {
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl	= megadev_unlocked_ioctl,
+	.open		= megadev_open,
+	.llseek		= noop_llseek,
+};
+
+/*
+ * Array to structures for storing the information about the controllers. This
+ * information is sent to the user level applications, when they do an ioctl
+ * for this information.
+ */
+static struct mcontroller mcontroller[MAX_CONTROLLERS];
+
+/* The current driver version */
+static u32 driver_ver = 0x02000000;
+
+/* major number used by the device for character interface */
+static int major;
+
+#define IS_RAID_CH(hba, ch)	(((hba)->mega_ch_class >> (ch)) & 0x01)
+
+
+/*
+ * Debug variable to print some diagnostic messages
+ */
+static int trace_level;
+
+/**
+ * mega_setup_mailbox()
+ * @adapter - pointer to our soft state
+ *
+ * Allocates a 8 byte aligned memory for the handshake mailbox.
+ */
+static int
+mega_setup_mailbox(adapter_t *adapter)
+{
+	unsigned long	align;
+
+	adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
+			sizeof(mbox64_t), &adapter->una_mbox64_dma);
+
+	if( !adapter->una_mbox64 ) return -1;
+		
+	adapter->mbox = &adapter->una_mbox64->mbox;
+
+	adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
+			(~0UL ^ 0xFUL));
+
+	adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
+
+	align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
+
+	adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
+
+	/*
+	 * Register the mailbox if the controller is an io-mapped controller
+	 */
+	if( adapter->flag & BOARD_IOMAP ) {
+
+		outb(adapter->mbox_dma & 0xFF,
+				adapter->host->io_port + MBOX_PORT0);
+
+		outb((adapter->mbox_dma >> 8) & 0xFF,
+				adapter->host->io_port + MBOX_PORT1);
+
+		outb((adapter->mbox_dma >> 16) & 0xFF,
+				adapter->host->io_port + MBOX_PORT2);
+
+		outb((adapter->mbox_dma >> 24) & 0xFF,
+				adapter->host->io_port + MBOX_PORT3);
+
+		outb(ENABLE_MBOX_BYTE,
+				adapter->host->io_port + ENABLE_MBOX_REGION);
+
+		irq_ack(adapter);
+
+		irq_enable(adapter);
+	}
+
+	return 0;
+}
+
+
+/*
+ * mega_query_adapter()
+ * @adapter - pointer to our soft state
+ *
+ * Issue the adapter inquiry commands to the controller and find out
+ * information and parameter about the devices attached
+ */
+static int
+mega_query_adapter(adapter_t *adapter)
+{
+	dma_addr_t	prod_info_dma_handle;
+	mega_inquiry3	*inquiry3;
+	u8	raw_mbox[sizeof(struct mbox_out)];
+	mbox_t	*mbox;
+	int	retval;
+
+	/* Initialize adapter inquiry mailbox */
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+	/*
+	 * Try to issue Inquiry3 command
+	 * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
+	 * update enquiry3 structure
+	 */
+	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+	inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
+
+	raw_mbox[0] = FC_NEW_CONFIG;		/* i.e. mbox->cmd=0xA1 */
+	raw_mbox[2] = NC_SUBOP_ENQUIRY3;	/* i.e. 0x0F */
+	raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;	/* i.e. 0x02 */
+
+	/* Issue a blocking command to the card */
+	if ((retval = issue_scb_block(adapter, raw_mbox))) {
+		/* the adapter does not support 40ld */
+
+		mraid_ext_inquiry	*ext_inq;
+		mraid_inquiry		*inq;
+		dma_addr_t		dma_handle;
+
+		ext_inq = pci_alloc_consistent(adapter->dev,
+				sizeof(mraid_ext_inquiry), &dma_handle);
+
+		if( ext_inq == NULL ) return -1;
+
+		inq = &ext_inq->raid_inq;
+
+		mbox->m_out.xferaddr = (u32)dma_handle;
+
+		/*issue old 0x04 command to adapter */
+		mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
+
+		issue_scb_block(adapter, raw_mbox);
+
+		/*
+		 * update Enquiry3 and ProductInfo structures with
+		 * mraid_inquiry structure
+		 */
+		mega_8_to_40ld(inq, inquiry3,
+				(mega_product_info *)&adapter->product_info);
+
+		pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
+				ext_inq, dma_handle);
+
+	} else {		/*adapter supports 40ld */
+		adapter->flag |= BOARD_40LD;
+
+		/*
+		 * get product_info, which is static information and will be
+		 * unchanged
+		 */
+		prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
+				&adapter->product_info,
+				sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
+
+		mbox->m_out.xferaddr = prod_info_dma_handle;
+
+		raw_mbox[0] = FC_NEW_CONFIG;	/* i.e. mbox->cmd=0xA1 */
+		raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;	/* i.e. 0x0E */
+
+		if ((retval = issue_scb_block(adapter, raw_mbox)))
+			printk(KERN_WARNING
+			"megaraid: Product_info cmd failed with error: %d\n",
+				retval);
+
+		pci_unmap_single(adapter->dev, prod_info_dma_handle,
+				sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
+	}
+
+
+	/*
+	 * kernel scans the channels from 0 to <= max_channel
+	 */
+	adapter->host->max_channel =
+		adapter->product_info.nchannels + NVIRT_CHAN -1;
+
+	adapter->host->max_id = 16;	/* max targets per channel */
+
+	adapter->host->max_lun = 7;	/* Up to 7 luns for non disk devices */
+
+	adapter->host->cmd_per_lun = max_cmd_per_lun;
+
+	adapter->numldrv = inquiry3->num_ldrv;
+
+	adapter->max_cmds = adapter->product_info.max_commands;
+
+	if(adapter->max_cmds > MAX_COMMANDS)
+		adapter->max_cmds = MAX_COMMANDS;
+
+	adapter->host->can_queue = adapter->max_cmds - 1;
+
+	/*
+	 * Get the maximum number of scatter-gather elements supported by this
+	 * firmware
+	 */
+	mega_get_max_sgl(adapter);
+
+	adapter->host->sg_tablesize = adapter->sglen;
+
+	/* use HP firmware and bios version encoding
+	   Note: fw_version[0|1] and bios_version[0|1] were originally shifted
+	   right 8 bits making them zero. This 0 value was hardcoded to fix
+	   sparse warnings. */
+	if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
+		sprintf (adapter->fw_version, "%c%d%d.%d%d",
+			 adapter->product_info.fw_version[2],
+			 0,
+			 adapter->product_info.fw_version[1] & 0x0f,
+			 0,
+			 adapter->product_info.fw_version[0] & 0x0f);
+		sprintf (adapter->bios_version, "%c%d%d.%d%d",
+			 adapter->product_info.bios_version[2],
+			 0,
+			 adapter->product_info.bios_version[1] & 0x0f,
+			 0,
+			 adapter->product_info.bios_version[0] & 0x0f);
+	} else {
+		memcpy(adapter->fw_version,
+				(char *)adapter->product_info.fw_version, 4);
+		adapter->fw_version[4] = 0;
+
+		memcpy(adapter->bios_version,
+				(char *)adapter->product_info.bios_version, 4);
+
+		adapter->bios_version[4] = 0;
+	}
+
+	printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
+		adapter->fw_version, adapter->bios_version, adapter->numldrv);
+
+	/*
+	 * Do we support extended (>10 bytes) cdbs
+	 */
+	adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
+	if (adapter->support_ext_cdb)
+		printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
+
+
+	return 0;
+}
+
+/**
+ * mega_runpendq()
+ * @adapter - pointer to our soft state
+ *
+ * Runs through the list of pending requests.
+ */
+static inline void
+mega_runpendq(adapter_t *adapter)
+{
+	if(!list_empty(&adapter->pending_list))
+		__mega_runpendq(adapter);
+}
+
+/*
+ * megaraid_queue()
+ * @scmd - Issue this scsi command
+ * @done - the callback hook into the scsi mid-layer
+ *
+ * The command queuing entry point for the mid-layer.
+ */
+static int
+megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
+{
+	adapter_t	*adapter;
+	scb_t	*scb;
+	int	busy=0;
+	unsigned long flags;
+
+	adapter = (adapter_t *)scmd->device->host->hostdata;
+
+	scmd->scsi_done = done;
+
+
+	/*
+	 * Allocate and build a SCB request
+	 * busy flag will be set if mega_build_cmd() command could not
+	 * allocate scb. We will return non-zero status in that case.
+	 * NOTE: scb can be null even though certain commands completed
+	 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
+	 * return 0 in that case.
+	 */
+
+	spin_lock_irqsave(&adapter->lock, flags);
+	scb = mega_build_cmd(adapter, scmd, &busy);
+	if (!scb)
+		goto out;
+
+	scb->state |= SCB_PENDQ;
+	list_add_tail(&scb->list, &adapter->pending_list);
+
+	/*
+	 * Check if the HBA is in quiescent state, e.g., during a
+	 * delete logical drive opertion. If it is, don't run
+	 * the pending_list.
+	 */
+	if (atomic_read(&adapter->quiescent) == 0)
+		mega_runpendq(adapter);
+
+	busy = 0;
+ out:
+	spin_unlock_irqrestore(&adapter->lock, flags);
+	return busy;
+}
+
+static DEF_SCSI_QCMD(megaraid_queue)
+
+/**
+ * mega_allocate_scb()
+ * @adapter - pointer to our soft state
+ * @cmd - scsi command from the mid-layer
+ *
+ * Allocate a SCB structure. This is the central structure for controller
+ * commands.
+ */
+static inline scb_t *
+mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
+{
+	struct list_head *head = &adapter->free_list;
+	scb_t	*scb;
+
+	/* Unlink command from Free List */
+	if( !list_empty(head) ) {
+
+		scb = list_entry(head->next, scb_t, list);
+
+		list_del_init(head->next);
+
+		scb->state = SCB_ACTIVE;
+		scb->cmd = cmd;
+		scb->dma_type = MEGA_DMA_TYPE_NONE;
+
+		return scb;
+	}
+
+	return NULL;
+}
+
+/**
+ * mega_get_ldrv_num()
+ * @adapter - pointer to our soft state
+ * @cmd - scsi mid layer command
+ * @channel - channel on the controller
+ *
+ * Calculate the logical drive number based on the information in scsi command
+ * and the channel number.
+ */
+static inline int
+mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
+{
+	int		tgt;
+	int		ldrv_num;
+
+	tgt = cmd->device->id;
+	
+	if ( tgt > adapter->this_id )
+		tgt--;	/* we do not get inquires for initiator id */
+
+	ldrv_num = (channel * 15) + tgt;
+
+
+	/*
+	 * If we have a logical drive with boot enabled, project it first
+	 */
+	if( adapter->boot_ldrv_enabled ) {
+		if( ldrv_num == 0 ) {
+			ldrv_num = adapter->boot_ldrv;
+		}
+		else {
+			if( ldrv_num <= adapter->boot_ldrv ) {
+				ldrv_num--;
+			}
+		}
+	}
+
+	/*
+	 * If "delete logical drive" feature is enabled on this controller.
+	 * Do only if at least one delete logical drive operation was done.
+	 *
+	 * Also, after logical drive deletion, instead of logical drive number,
+	 * the value returned should be 0x80+logical drive id.
+	 *
+	 * These is valid only for IO commands.
+	 */
+
+	if (adapter->support_random_del && adapter->read_ldidmap )
+		switch (cmd->cmnd[0]) {
+		case READ_6:	/* fall through */
+		case WRITE_6:	/* fall through */
+		case READ_10:	/* fall through */
+		case WRITE_10:
+			ldrv_num += 0x80;
+		}
+
+	return ldrv_num;
+}
+
+/**
+ * mega_build_cmd()
+ * @adapter - pointer to our soft state
+ * @cmd - Prepare using this scsi command
+ * @busy - busy flag if no resources
+ *
+ * Prepares a command and scatter gather list for the controller. This routine
+ * also finds out if the commands is intended for a logical drive or a
+ * physical device and prepares the controller command accordingly.
+ *
+ * We also re-order the logical drives and physical devices based on their
+ * boot settings.
+ */
+static scb_t *
+mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
+{
+	mega_ext_passthru	*epthru;
+	mega_passthru	*pthru;
+	scb_t	*scb;
+	mbox_t	*mbox;
+	u32	seg;
+	char	islogical;
+	int	max_ldrv_num;
+	int	channel = 0;
+	int	target = 0;
+	int	ldrv_num = 0;   /* logical drive number */
+
+	/*
+	 * We know what channels our logical drives are on - mega_find_card()
+	 */
+	islogical = adapter->logdrv_chan[cmd->device->channel];
+
+	/*
+	 * The theory: If physical drive is chosen for boot, all the physical
+	 * devices are exported before the logical drives, otherwise physical
+	 * devices are pushed after logical drives, in which case - Kernel sees
+	 * the physical devices on virtual channel which is obviously converted
+	 * to actual channel on the HBA.
+	 */
+	if( adapter->boot_pdrv_enabled ) {
+		if( islogical ) {
+			/* logical channel */
+			channel = cmd->device->channel -
+				adapter->product_info.nchannels;
+		}
+		else {
+			/* this is physical channel */
+			channel = cmd->device->channel; 
+			target = cmd->device->id;
+
+			/*
+			 * boot from a physical disk, that disk needs to be
+			 * exposed first IF both the channels are SCSI, then
+			 * booting from the second channel is not allowed.
+			 */
+			if( target == 0 ) {
+				target = adapter->boot_pdrv_tgt;
+			}
+			else if( target == adapter->boot_pdrv_tgt ) {
+				target = 0;
+			}
+		}
+	}
+	else {
+		if( islogical ) {
+			/* this is the logical channel */
+			channel = cmd->device->channel;	
+		}
+		else {
+			/* physical channel */
+			channel = cmd->device->channel - NVIRT_CHAN;	
+			target = cmd->device->id;
+		}
+	}
+
+
+	if(islogical) {
+
+		/* have just LUN 0 for each target on virtual channels */
+		if (cmd->device->lun) {
+			cmd->result = (DID_BAD_TARGET << 16);
+			cmd->scsi_done(cmd);
+			return NULL;
+		}
+
+		ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
+
+
+		max_ldrv_num = (adapter->flag & BOARD_40LD) ?
+			MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
+
+		/*
+		 * max_ldrv_num increases by 0x80 if some logical drive was
+		 * deleted.
+		 */
+		if(adapter->read_ldidmap)
+			max_ldrv_num += 0x80;
+
+		if(ldrv_num > max_ldrv_num ) {
+			cmd->result = (DID_BAD_TARGET << 16);
+			cmd->scsi_done(cmd);
+			return NULL;
+		}
+
+	}
+	else {
+		if( cmd->device->lun > 7) {
+			/*
+			 * Do not support lun >7 for physically accessed
+			 * devices
+			 */
+			cmd->result = (DID_BAD_TARGET << 16);
+			cmd->scsi_done(cmd);
+			return NULL;
+		}
+	}
+
+	/*
+	 *
+	 * Logical drive commands
+	 *
+	 */
+	if(islogical) {
+		switch (cmd->cmnd[0]) {
+		case TEST_UNIT_READY:
+#if MEGA_HAVE_CLUSTERING
+			/*
+			 * Do we support clustering and is the support enabled
+			 * If no, return success always
+			 */
+			if( !adapter->has_cluster ) {
+				cmd->result = (DID_OK << 16);
+				cmd->scsi_done(cmd);
+				return NULL;
+			}
+
+			if(!(scb = mega_allocate_scb(adapter, cmd))) {
+				*busy = 1;
+				return NULL;
+			}
+
+			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
+			scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
+			scb->raw_mbox[3] = ldrv_num;
+
+			scb->dma_direction = PCI_DMA_NONE;
+
+			return scb;
+#else
+			cmd->result = (DID_OK << 16);
+			cmd->scsi_done(cmd);
+			return NULL;
+#endif
+
+		case MODE_SENSE: {
+			char *buf;
+			struct scatterlist *sg;
+
+			sg = scsi_sglist(cmd);
+			buf = kmap_atomic(sg_page(sg)) + sg->offset;
+
+			memset(buf, 0, cmd->cmnd[4]);
+			kunmap_atomic(buf - sg->offset);
+
+			cmd->result = (DID_OK << 16);
+			cmd->scsi_done(cmd);
+			return NULL;
+		}
+
+		case READ_CAPACITY:
+		case INQUIRY:
+
+			if(!(adapter->flag & (1L << cmd->device->channel))) {
+
+				printk(KERN_NOTICE
+					"scsi%d: scanning scsi channel %d ",
+						adapter->host->host_no,
+						cmd->device->channel);
+				printk("for logical drives.\n");
+
+				adapter->flag |= (1L << cmd->device->channel);
+			}
+
+			/* Allocate a SCB and initialize passthru */
+			if(!(scb = mega_allocate_scb(adapter, cmd))) {
+				*busy = 1;
+				return NULL;
+			}
+			pthru = scb->pthru;
+
+			mbox = (mbox_t *)scb->raw_mbox;
+			memset(mbox, 0, sizeof(scb->raw_mbox));
+			memset(pthru, 0, sizeof(mega_passthru));
+
+			pthru->timeout = 0;
+			pthru->ars = 1;
+			pthru->reqsenselen = 14;
+			pthru->islogical = 1;
+			pthru->logdrv = ldrv_num;
+			pthru->cdblen = cmd->cmd_len;
+			memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
+
+			if( adapter->has_64bit_addr ) {
+				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
+			}
+			else {
+				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
+			}
+
+			scb->dma_direction = PCI_DMA_FROMDEVICE;
+
+			pthru->numsgelements = mega_build_sglist(adapter, scb,
+				&pthru->dataxferaddr, &pthru->dataxferlen);
+
+			mbox->m_out.xferaddr = scb->pthru_dma_addr;
+
+			return scb;
+
+		case READ_6:
+		case WRITE_6:
+		case READ_10:
+		case WRITE_10:
+		case READ_12:
+		case WRITE_12:
+
+			/* Allocate a SCB and initialize mailbox */
+			if(!(scb = mega_allocate_scb(adapter, cmd))) {
+				*busy = 1;
+				return NULL;
+			}
+			mbox = (mbox_t *)scb->raw_mbox;
+
+			memset(mbox, 0, sizeof(scb->raw_mbox));
+			mbox->m_out.logdrv = ldrv_num;
+
+			/*
+			 * A little hack: 2nd bit is zero for all scsi read
+			 * commands and is set for all scsi write commands
+			 */
+			if( adapter->has_64bit_addr ) {
+				mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
+					MEGA_MBOXCMD_LWRITE64:
+					MEGA_MBOXCMD_LREAD64 ;
+			}
+			else {
+				mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
+					MEGA_MBOXCMD_LWRITE:
+					MEGA_MBOXCMD_LREAD ;
+			}
+
+			/*
+			 * 6-byte READ(0x08) or WRITE(0x0A) cdb
+			 */
+			if( cmd->cmd_len == 6 ) {
+				mbox->m_out.numsectors = (u32) cmd->cmnd[4];
+				mbox->m_out.lba =
+					((u32)cmd->cmnd[1] << 16) |
+					((u32)cmd->cmnd[2] << 8) |
+					(u32)cmd->cmnd[3];
+
+				mbox->m_out.lba &= 0x1FFFFF;
+
+#if MEGA_HAVE_STATS
+				/*
+				 * Take modulo 0x80, since the logical drive
+				 * number increases by 0x80 when a logical
+				 * drive was deleted
+				 */
+				if (*cmd->cmnd == READ_6) {
+					adapter->nreads[ldrv_num%0x80]++;
+					adapter->nreadblocks[ldrv_num%0x80] +=
+						mbox->m_out.numsectors;
+				} else {
+					adapter->nwrites[ldrv_num%0x80]++;
+					adapter->nwriteblocks[ldrv_num%0x80] +=
+						mbox->m_out.numsectors;
+				}
+#endif
+			}
+
+			/*
+			 * 10-byte READ(0x28) or WRITE(0x2A) cdb
+			 */
+			if( cmd->cmd_len == 10 ) {
+				mbox->m_out.numsectors =
+					(u32)cmd->cmnd[8] |
+					((u32)cmd->cmnd[7] << 8);
+				mbox->m_out.lba =
+					((u32)cmd->cmnd[2] << 24) |
+					((u32)cmd->cmnd[3] << 16) |
+					((u32)cmd->cmnd[4] << 8) |
+					(u32)cmd->cmnd[5];
+
+#if MEGA_HAVE_STATS
+				if (*cmd->cmnd == READ_10) {
+					adapter->nreads[ldrv_num%0x80]++;
+					adapter->nreadblocks[ldrv_num%0x80] +=
+						mbox->m_out.numsectors;
+				} else {
+					adapter->nwrites[ldrv_num%0x80]++;
+					adapter->nwriteblocks[ldrv_num%0x80] +=
+						mbox->m_out.numsectors;
+				}
+#endif
+			}
+
+			/*
+			 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
+			 */
+			if( cmd->cmd_len == 12 ) {
+				mbox->m_out.lba =
+					((u32)cmd->cmnd[2] << 24) |
+					((u32)cmd->cmnd[3] << 16) |
+					((u32)cmd->cmnd[4] << 8) |
+					(u32)cmd->cmnd[5];
+
+				mbox->m_out.numsectors =
+					((u32)cmd->cmnd[6] << 24) |
+					((u32)cmd->cmnd[7] << 16) |
+					((u32)cmd->cmnd[8] << 8) |
+					(u32)cmd->cmnd[9];
+
+#if MEGA_HAVE_STATS
+				if (*cmd->cmnd == READ_12) {
+					adapter->nreads[ldrv_num%0x80]++;
+					adapter->nreadblocks[ldrv_num%0x80] +=
+						mbox->m_out.numsectors;
+				} else {
+					adapter->nwrites[ldrv_num%0x80]++;
+					adapter->nwriteblocks[ldrv_num%0x80] +=
+						mbox->m_out.numsectors;
+				}
+#endif
+			}
+
+			/*
+			 * If it is a read command
+			 */
+			if( (*cmd->cmnd & 0x0F) == 0x08 ) {
+				scb->dma_direction = PCI_DMA_FROMDEVICE;
+			}
+			else {
+				scb->dma_direction = PCI_DMA_TODEVICE;
+			}
+
+			/* Calculate Scatter-Gather info */
+			mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
+					(u32 *)&mbox->m_out.xferaddr, &seg);
+
+			return scb;
+
+#if MEGA_HAVE_CLUSTERING
+		case RESERVE:	/* Fall through */
+		case RELEASE:
+
+			/*
+			 * Do we support clustering and is the support enabled
+			 */
+			if( ! adapter->has_cluster ) {
+
+				cmd->result = (DID_BAD_TARGET << 16);
+				cmd->scsi_done(cmd);
+				return NULL;
+			}
+
+			/* Allocate a SCB and initialize mailbox */
+			if(!(scb = mega_allocate_scb(adapter, cmd))) {
+				*busy = 1;
+				return NULL;
+			}
+
+			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
+			scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
+				MEGA_RESERVE_LD : MEGA_RELEASE_LD;
+
+			scb->raw_mbox[3] = ldrv_num;
+
+			scb->dma_direction = PCI_DMA_NONE;
+
+			return scb;
+#endif
+
+		default:
+			cmd->result = (DID_BAD_TARGET << 16);
+			cmd->scsi_done(cmd);
+			return NULL;
+		}
+	}
+
+	/*
+	 * Passthru drive commands
+	 */
+	else {
+		/* Allocate a SCB and initialize passthru */
+		if(!(scb = mega_allocate_scb(adapter, cmd))) {
+			*busy = 1;
+			return NULL;
+		}
+
+		mbox = (mbox_t *)scb->raw_mbox;
+		memset(mbox, 0, sizeof(scb->raw_mbox));
+
+		if( adapter->support_ext_cdb ) {
+
+			epthru = mega_prepare_extpassthru(adapter, scb, cmd,
+					channel, target);
+
+			mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
+
+			mbox->m_out.xferaddr = scb->epthru_dma_addr;
+
+		}
+		else {
+
+			pthru = mega_prepare_passthru(adapter, scb, cmd,
+					channel, target);
+
+			/* Initialize mailbox */
+			if( adapter->has_64bit_addr ) {
+				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
+			}
+			else {
+				mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
+			}
+
+			mbox->m_out.xferaddr = scb->pthru_dma_addr;
+
+		}
+		return scb;
+	}
+	return NULL;
+}
+
+
+/**
+ * mega_prepare_passthru()
+ * @adapter - pointer to our soft state
+ * @scb - our scsi control block
+ * @cmd - scsi command from the mid-layer
+ * @channel - actual channel on the controller
+ * @target - actual id on the controller.
+ *
+ * prepare a command for the scsi physical devices.
+ */
+static mega_passthru *
+mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
+		int channel, int target)
+{
+	mega_passthru *pthru;
+
+	pthru = scb->pthru;
+	memset(pthru, 0, sizeof (mega_passthru));
+
+	/* 0=6sec/1=60sec/2=10min/3=3hrs */
+	pthru->timeout = 2;
+
+	pthru->ars = 1;
+	pthru->reqsenselen = 14;
+	pthru->islogical = 0;
+
+	pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
+
+	pthru->target = (adapter->flag & BOARD_40LD) ?
+		(channel << 4) | target : target;
+
+	pthru->cdblen = cmd->cmd_len;
+	pthru->logdrv = cmd->device->lun;
+
+	memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
+
+	/* Not sure about the direction */
+	scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
+
+	/* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
+	switch (cmd->cmnd[0]) {
+	case INQUIRY:
+	case READ_CAPACITY:
+		if(!(adapter->flag & (1L << cmd->device->channel))) {
+
+			printk(KERN_NOTICE
+				"scsi%d: scanning scsi channel %d [P%d] ",
+					adapter->host->host_no,
+					cmd->device->channel, channel);
+			printk("for physical devices.\n");
+
+			adapter->flag |= (1L << cmd->device->channel);
+		}
+		/* Fall through */
+	default:
+		pthru->numsgelements = mega_build_sglist(adapter, scb,
+				&pthru->dataxferaddr, &pthru->dataxferlen);
+		break;
+	}
+	return pthru;
+}
+
+
+/**
+ * mega_prepare_extpassthru()
+ * @adapter - pointer to our soft state
+ * @scb - our scsi control block
+ * @cmd - scsi command from the mid-layer
+ * @channel - actual channel on the controller
+ * @target - actual id on the controller.
+ *
+ * prepare a command for the scsi physical devices. This rountine prepares
+ * commands for devices which can take extended CDBs (>10 bytes)
+ */
+static mega_ext_passthru *
+mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
+		int channel, int target)
+{
+	mega_ext_passthru	*epthru;
+
+	epthru = scb->epthru;
+	memset(epthru, 0, sizeof(mega_ext_passthru));
+
+	/* 0=6sec/1=60sec/2=10min/3=3hrs */
+	epthru->timeout = 2;
+
+	epthru->ars = 1;
+	epthru->reqsenselen = 14;
+	epthru->islogical = 0;
+
+	epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
+	epthru->target = (adapter->flag & BOARD_40LD) ?
+		(channel << 4) | target : target;
+
+	epthru->cdblen = cmd->cmd_len;
+	epthru->logdrv = cmd->device->lun;
+
+	memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
+
+	/* Not sure about the direction */
+	scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
+
+	switch(cmd->cmnd[0]) {
+	case INQUIRY:
+	case READ_CAPACITY:
+		if(!(adapter->flag & (1L << cmd->device->channel))) {
+
+			printk(KERN_NOTICE
+				"scsi%d: scanning scsi channel %d [P%d] ",
+					adapter->host->host_no,
+					cmd->device->channel, channel);
+			printk("for physical devices.\n");
+
+			adapter->flag |= (1L << cmd->device->channel);
+		}
+		/* Fall through */
+	default:
+		epthru->numsgelements = mega_build_sglist(adapter, scb,
+				&epthru->dataxferaddr, &epthru->dataxferlen);
+		break;
+	}
+
+	return epthru;
+}
+
+static void
+__mega_runpendq(adapter_t *adapter)
+{
+	scb_t *scb;
+	struct list_head *pos, *next;
+
+	/* Issue any pending commands to the card */
+	list_for_each_safe(pos, next, &adapter->pending_list) {
+
+		scb = list_entry(pos, scb_t, list);
+
+		if( !(scb->state & SCB_ISSUED) ) {
+
+			if( issue_scb(adapter, scb) != 0 )
+				return;
+		}
+	}
+
+	return;
+}
+
+
+/**
+ * issue_scb()
+ * @adapter - pointer to our soft state
+ * @scb - scsi control block
+ *
+ * Post a command to the card if the mailbox is available, otherwise return
+ * busy. We also take the scb from the pending list if the mailbox is
+ * available.
+ */
+static int
+issue_scb(adapter_t *adapter, scb_t *scb)
+{
+	volatile mbox64_t	*mbox64 = adapter->mbox64;
+	volatile mbox_t		*mbox = adapter->mbox;
+	unsigned int	i = 0;
+
+	if(unlikely(mbox->m_in.busy)) {
+		do {
+			udelay(1);
+			i++;
+		} while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
+
+		if(mbox->m_in.busy) return -1;
+	}
+
+	/* Copy mailbox data into host structure */
+	memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox, 
+			sizeof(struct mbox_out));
+
+	mbox->m_out.cmdid = scb->idx;	/* Set cmdid */
+	mbox->m_in.busy = 1;		/* Set busy */
+
+
+	/*
+	 * Increment the pending queue counter
+	 */
+	atomic_inc(&adapter->pend_cmds);
+
+	switch (mbox->m_out.cmd) {
+	case MEGA_MBOXCMD_LREAD64:
+	case MEGA_MBOXCMD_LWRITE64:
+	case MEGA_MBOXCMD_PASSTHRU64:
+	case MEGA_MBOXCMD_EXTPTHRU:
+		mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
+		mbox64->xfer_segment_hi = 0;
+		mbox->m_out.xferaddr = 0xFFFFFFFF;
+		break;
+	default:
+		mbox64->xfer_segment_lo = 0;
+		mbox64->xfer_segment_hi = 0;
+	}
+
+	/*
+	 * post the command
+	 */
+	scb->state |= SCB_ISSUED;
+
+	if( likely(adapter->flag & BOARD_MEMMAP) ) {
+		mbox->m_in.poll = 0;
+		mbox->m_in.ack = 0;
+		WRINDOOR(adapter, adapter->mbox_dma | 0x1);
+	}
+	else {
+		irq_enable(adapter);
+		issue_command(adapter);
+	}
+
+	return 0;
+}
+
+/*
+ * Wait until the controller's mailbox is available
+ */
+static inline int
+mega_busywait_mbox (adapter_t *adapter)
+{
+	if (adapter->mbox->m_in.busy)
+		return __mega_busywait_mbox(adapter);
+	return 0;
+}
+
+/**
+ * issue_scb_block()
+ * @adapter - pointer to our soft state
+ * @raw_mbox - the mailbox
+ *
+ * Issue a scb in synchronous and non-interrupt mode
+ */
+static int
+issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
+{
+	volatile mbox64_t *mbox64 = adapter->mbox64;
+	volatile mbox_t *mbox = adapter->mbox;
+	u8	byte;
+
+	/* Wait until mailbox is free */
+	if(mega_busywait_mbox (adapter))
+		goto bug_blocked_mailbox;
+
+	/* Copy mailbox data into host structure */
+	memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
+	mbox->m_out.cmdid = 0xFE;
+	mbox->m_in.busy = 1;
+
+	switch (raw_mbox[0]) {
+	case MEGA_MBOXCMD_LREAD64:
+	case MEGA_MBOXCMD_LWRITE64:
+	case MEGA_MBOXCMD_PASSTHRU64:
+	case MEGA_MBOXCMD_EXTPTHRU:
+		mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
+		mbox64->xfer_segment_hi = 0;
+		mbox->m_out.xferaddr = 0xFFFFFFFF;
+		break;
+	default:
+		mbox64->xfer_segment_lo = 0;
+		mbox64->xfer_segment_hi = 0;
+	}
+
+	if( likely(adapter->flag & BOARD_MEMMAP) ) {
+		mbox->m_in.poll = 0;
+		mbox->m_in.ack = 0;
+		mbox->m_in.numstatus = 0xFF;
+		mbox->m_in.status = 0xFF;
+		WRINDOOR(adapter, adapter->mbox_dma | 0x1);
+
+		while((volatile u8)mbox->m_in.numstatus == 0xFF)
+			cpu_relax();
+
+		mbox->m_in.numstatus = 0xFF;
+
+		while( (volatile u8)mbox->m_in.poll != 0x77 )
+			cpu_relax();
+
+		mbox->m_in.poll = 0;
+		mbox->m_in.ack = 0x77;
+
+		WRINDOOR(adapter, adapter->mbox_dma | 0x2);
+
+		while(RDINDOOR(adapter) & 0x2)
+			cpu_relax();
+	}
+	else {
+		irq_disable(adapter);
+		issue_command(adapter);
+
+		while (!((byte = irq_state(adapter)) & INTR_VALID))
+			cpu_relax();
+
+		set_irq_state(adapter, byte);
+		irq_enable(adapter);
+		irq_ack(adapter);
+	}
+
+	return mbox->m_in.status;
+
+bug_blocked_mailbox:
+	printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
+	udelay (1000);
+	return -1;
+}
+
+
+/**
+ * megaraid_isr_iomapped()
+ * @irq - irq
+ * @devp - pointer to our soft state
+ *
+ * Interrupt service routine for io-mapped controllers.
+ * Find out if our device is interrupting. If yes, acknowledge the interrupt
+ * and service the completed commands.
+ */
+static irqreturn_t
+megaraid_isr_iomapped(int irq, void *devp)
+{
+	adapter_t	*adapter = devp;
+	unsigned long	flags;
+	u8	status;
+	u8	nstatus;
+	u8	completed[MAX_FIRMWARE_STATUS];
+	u8	byte;
+	int	handled = 0;
+
+
+	/*
+	 * loop till F/W has more commands for us to complete.
+	 */
+	spin_lock_irqsave(&adapter->lock, flags);
+
+	do {
+		/* Check if a valid interrupt is pending */
+		byte = irq_state(adapter);
+		if( (byte & VALID_INTR_BYTE) == 0 ) {
+			/*
+			 * No more pending commands
+			 */
+			goto out_unlock;
+		}
+		set_irq_state(adapter, byte);
+
+		while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
+				== 0xFF)
+			cpu_relax();
+		adapter->mbox->m_in.numstatus = 0xFF;
+
+		status = adapter->mbox->m_in.status;
+
+		/*
+		 * decrement the pending queue counter
+		 */
+		atomic_sub(nstatus, &adapter->pend_cmds);
+
+		memcpy(completed, (void *)adapter->mbox->m_in.completed, 
+				nstatus);
+
+		/* Acknowledge interrupt */
+		irq_ack(adapter);
+
+		mega_cmd_done(adapter, completed, nstatus, status);
+
+		mega_rundoneq(adapter);
+
+		handled = 1;
+
+		/* Loop through any pending requests */
+		if(atomic_read(&adapter->quiescent) == 0) {
+			mega_runpendq(adapter);
+		}
+
+	} while(1);
+
+ out_unlock:
+
+	spin_unlock_irqrestore(&adapter->lock, flags);
+
+	return IRQ_RETVAL(handled);
+}
+
+
+/**
+ * megaraid_isr_memmapped()
+ * @irq - irq
+ * @devp - pointer to our soft state
+ *
+ * Interrupt service routine for memory-mapped controllers.
+ * Find out if our device is interrupting. If yes, acknowledge the interrupt
+ * and service the completed commands.
+ */
+static irqreturn_t
+megaraid_isr_memmapped(int irq, void *devp)
+{
+	adapter_t	*adapter = devp;
+	unsigned long	flags;
+	u8	status;
+	u32	dword = 0;
+	u8	nstatus;
+	u8	completed[MAX_FIRMWARE_STATUS];
+	int	handled = 0;
+
+
+	/*
+	 * loop till F/W has more commands for us to complete.
+	 */
+	spin_lock_irqsave(&adapter->lock, flags);
+
+	do {
+		/* Check if a valid interrupt is pending */
+		dword = RDOUTDOOR(adapter);
+		if(dword != 0x10001234) {
+			/*
+			 * No more pending commands
+			 */
+			goto out_unlock;
+		}
+		WROUTDOOR(adapter, 0x10001234);
+
+		while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
+				== 0xFF) {
+			cpu_relax();
+		}
+		adapter->mbox->m_in.numstatus = 0xFF;
+
+		status = adapter->mbox->m_in.status;
+
+		/*
+		 * decrement the pending queue counter
+		 */
+		atomic_sub(nstatus, &adapter->pend_cmds);
+
+		memcpy(completed, (void *)adapter->mbox->m_in.completed, 
+				nstatus);
+
+		/* Acknowledge interrupt */
+		WRINDOOR(adapter, 0x2);
+
+		handled = 1;
+
+		while( RDINDOOR(adapter) & 0x02 )
+			cpu_relax();
+
+		mega_cmd_done(adapter, completed, nstatus, status);
+
+		mega_rundoneq(adapter);
+
+		/* Loop through any pending requests */
+		if(atomic_read(&adapter->quiescent) == 0) {
+			mega_runpendq(adapter);
+		}
+
+	} while(1);
+
+ out_unlock:
+
+	spin_unlock_irqrestore(&adapter->lock, flags);
+
+	return IRQ_RETVAL(handled);
+}
+/**
+ * mega_cmd_done()
+ * @adapter - pointer to our soft state
+ * @completed - array of ids of completed commands
+ * @nstatus - number of completed commands
+ * @status - status of the last command completed
+ *
+ * Complete the commands and call the scsi mid-layer callback hooks.
+ */
+static void
+mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
+{
+	mega_ext_passthru	*epthru = NULL;
+	struct scatterlist	*sgl;
+	Scsi_Cmnd	*cmd = NULL;
+	mega_passthru	*pthru = NULL;
+	mbox_t	*mbox = NULL;
+	u8	c;
+	scb_t	*scb;
+	int	islogical;
+	int	cmdid;
+	int	i;
+
+	/*
+	 * for all the commands completed, call the mid-layer callback routine
+	 * and free the scb.
+	 */
+	for( i = 0; i < nstatus; i++ ) {
+
+		cmdid = completed[i];
+
+		/*
+		 * Only free SCBs for the commands coming down from the
+		 * mid-layer, not for which were issued internally
+		 *
+		 * For internal command, restore the status returned by the
+		 * firmware so that user can interpret it.
+		 */
+		if (cmdid == CMDID_INT_CMDS) {
+			scb = &adapter->int_scb;
+
+			list_del_init(&scb->list);
+			scb->state = SCB_FREE;
+
+			adapter->int_status = status;
+			complete(&adapter->int_waitq);
+		} else {
+			scb = &adapter->scb_list[cmdid];
+
+			/*
+			 * Make sure f/w has completed a valid command
+			 */
+			if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
+				printk(KERN_CRIT
+					"megaraid: invalid command ");
+				printk("Id %d, scb->state:%x, scsi cmd:%p\n",
+					cmdid, scb->state, scb->cmd);
+
+				continue;
+			}
+
+			/*
+			 * Was a abort issued for this command
+			 */
+			if( scb->state & SCB_ABORT ) {
+
+				printk(KERN_WARNING
+				"megaraid: aborted cmd [%x] complete.\n",
+					scb->idx);
+
+				scb->cmd->result = (DID_ABORT << 16);
+
+				list_add_tail(SCSI_LIST(scb->cmd),
+						&adapter->completed_list);
+
+				mega_free_scb(adapter, scb);
+
+				continue;
+			}
+
+			/*
+			 * Was a reset issued for this command
+			 */
+			if( scb->state & SCB_RESET ) {
+
+				printk(KERN_WARNING
+				"megaraid: reset cmd [%x] complete.\n",
+					scb->idx);
+
+				scb->cmd->result = (DID_RESET << 16);
+
+				list_add_tail(SCSI_LIST(scb->cmd),
+						&adapter->completed_list);
+
+				mega_free_scb (adapter, scb);
+
+				continue;
+			}
+
+			cmd = scb->cmd;
+			pthru = scb->pthru;
+			epthru = scb->epthru;
+			mbox = (mbox_t *)scb->raw_mbox;
+
+#if MEGA_HAVE_STATS
+			{
+
+			int	logdrv = mbox->m_out.logdrv;
+
+			islogical = adapter->logdrv_chan[cmd->channel];
+			/*
+			 * Maintain an error counter for the logical drive.
+			 * Some application like SNMP agent need such
+			 * statistics
+			 */
+			if( status && islogical && (cmd->cmnd[0] == READ_6 ||
+						cmd->cmnd[0] == READ_10 ||
+						cmd->cmnd[0] == READ_12)) {
+				/*
+				 * Logical drive number increases by 0x80 when
+				 * a logical drive is deleted
+				 */
+				adapter->rd_errors[logdrv%0x80]++;
+			}
+
+			if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
+						cmd->cmnd[0] == WRITE_10 ||
+						cmd->cmnd[0] == WRITE_12)) {
+				/*
+				 * Logical drive number increases by 0x80 when
+				 * a logical drive is deleted
+				 */
+				adapter->wr_errors[logdrv%0x80]++;
+			}
+
+			}
+#endif
+		}
+
+		/*
+		 * Do not return the presence of hard disk on the channel so,
+		 * inquiry sent, and returned data==hard disk or removable
+		 * hard disk and not logical, request should return failure! -
+		 * PJ
+		 */
+		islogical = adapter->logdrv_chan[cmd->device->channel];
+		if( cmd->cmnd[0] == INQUIRY && !islogical ) {
+
+			sgl = scsi_sglist(cmd);
+			if( sg_page(sgl) ) {
+				c = *(unsigned char *) sg_virt(&sgl[0]);
+			} else {
+				printk(KERN_WARNING
+				       "megaraid: invalid sg.\n");
+				c = 0;
+			}
+
+			if(IS_RAID_CH(adapter, cmd->device->channel) &&
+					((c & 0x1F ) == TYPE_DISK)) {
+				status = 0xF0;
+			}
+		}
+
+		/* clear result; otherwise, success returns corrupt value */
+		cmd->result = 0;
+
+		/* Convert MegaRAID status to Linux error code */
+		switch (status) {
+		case 0x00:	/* SUCCESS , i.e. SCSI_STATUS_GOOD */
+			cmd->result |= (DID_OK << 16);
+			break;
+
+		case 0x02:	/* ERROR_ABORTED, i.e.
+				   SCSI_STATUS_CHECK_CONDITION */
+
+			/* set sense_buffer and result fields */
+			if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
+				mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
+
+				memcpy(cmd->sense_buffer, pthru->reqsensearea,
+						14);
+
+				cmd->result = (DRIVER_SENSE << 24) |
+					(DID_OK << 16) |
+					(CHECK_CONDITION << 1);
+			}
+			else {
+				if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
+
+					memcpy(cmd->sense_buffer,
+						epthru->reqsensearea, 14);
+
+					cmd->result = (DRIVER_SENSE << 24) |
+						(DID_OK << 16) |
+						(CHECK_CONDITION << 1);
+				} else {
+					cmd->sense_buffer[0] = 0x70;
+					cmd->sense_buffer[2] = ABORTED_COMMAND;
+					cmd->result |= (CHECK_CONDITION << 1);
+				}
+			}
+			break;
+
+		case 0x08:	/* ERR_DEST_DRIVE_FAILED, i.e.
+				   SCSI_STATUS_BUSY */
+			cmd->result |= (DID_BUS_BUSY << 16) | status;
+			break;
+
+		default:
+#if MEGA_HAVE_CLUSTERING
+			/*
+			 * If TEST_UNIT_READY fails, we know
+			 * MEGA_RESERVATION_STATUS failed
+			 */
+			if( cmd->cmnd[0] == TEST_UNIT_READY ) {
+				cmd->result |= (DID_ERROR << 16) |
+					(RESERVATION_CONFLICT << 1);
+			}
+			else
+			/*
+			 * Error code returned is 1 if Reserve or Release
+			 * failed or the input parameter is invalid
+			 */
+			if( status == 1 &&
+				(cmd->cmnd[0] == RESERVE ||
+					 cmd->cmnd[0] == RELEASE) ) {
+
+				cmd->result |= (DID_ERROR << 16) |
+					(RESERVATION_CONFLICT << 1);
+			}
+			else
+#endif
+				cmd->result |= (DID_BAD_TARGET << 16)|status;
+		}
+
+		mega_free_scb(adapter, scb);
+
+		/* Add Scsi_Command to end of completed queue */
+		list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
+	}
+}
+
+
+/*
+ * mega_runpendq()
+ *
+ * Run through the list of completed requests and finish it
+ */
+static void
+mega_rundoneq (adapter_t *adapter)
+{
+	Scsi_Cmnd *cmd;
+	struct list_head *pos;
+
+	list_for_each(pos, &adapter->completed_list) {
+
+		struct scsi_pointer* spos = (struct scsi_pointer *)pos;
+
+		cmd = list_entry(spos, Scsi_Cmnd, SCp);
+		cmd->scsi_done(cmd);
+	}
+
+	INIT_LIST_HEAD(&adapter->completed_list);
+}
+
+
+/*
+ * Free a SCB structure
+ * Note: We assume the scsi commands associated with this scb is not free yet.
+ */
+static void
+mega_free_scb(adapter_t *adapter, scb_t *scb)
+{
+	switch( scb->dma_type ) {
+
+	case MEGA_DMA_TYPE_NONE:
+		break;
+
+	case MEGA_SGLIST:
+		scsi_dma_unmap(scb->cmd);
+		break;
+	default:
+		break;
+	}
+
+	/*
+	 * Remove from the pending list
+	 */
+	list_del_init(&scb->list);
+
+	/* Link the scb back into free list */
+	scb->state = SCB_FREE;
+	scb->cmd = NULL;
+
+	list_add(&scb->list, &adapter->free_list);
+}
+
+
+static int
+__mega_busywait_mbox (adapter_t *adapter)
+{
+	volatile mbox_t *mbox = adapter->mbox;
+	long counter;
+
+	for (counter = 0; counter < 10000; counter++) {
+		if (!mbox->m_in.busy)
+			return 0;
+		udelay(100);
+		cond_resched();
+	}
+	return -1;		/* give up after 1 second */
+}
+
+/*
+ * Copies data to SGLIST
+ * Note: For 64 bit cards, we need a minimum of one SG element for read/write
+ */
+static int
+mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
+{
+	struct scatterlist *sg;
+	Scsi_Cmnd	*cmd;
+	int	sgcnt;
+	int	idx;
+
+	cmd = scb->cmd;
+
+	/*
+	 * Copy Scatter-Gather list info into controller structure.
+	 *
+	 * The number of sg elements returned must not exceed our limit
+	 */
+	sgcnt = scsi_dma_map(cmd);
+
+	scb->dma_type = MEGA_SGLIST;
+
+	BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
+
+	*len = 0;
+
+	if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
+		sg = scsi_sglist(cmd);
+		scb->dma_h_bulkdata = sg_dma_address(sg);
+		*buf = (u32)scb->dma_h_bulkdata;
+		*len = sg_dma_len(sg);
+		return 0;
+	}
+
+	scsi_for_each_sg(cmd, sg, sgcnt, idx) {
+		if (adapter->has_64bit_addr) {
+			scb->sgl64[idx].address = sg_dma_address(sg);
+			*len += scb->sgl64[idx].length = sg_dma_len(sg);
+		} else {
+			scb->sgl[idx].address = sg_dma_address(sg);
+			*len += scb->sgl[idx].length = sg_dma_len(sg);
+		}
+	}
+
+	/* Reset pointer and length fields */
+	*buf = scb->sgl_dma_addr;
+
+	/* Return count of SG requests */
+	return sgcnt;
+}
+
+
+/*
+ * mega_8_to_40ld()
+ *
+ * takes all info in AdapterInquiry structure and puts it into ProductInfo and
+ * Enquiry3 structures for later use
+ */
+static void
+mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
+		mega_product_info *product_info)
+{
+	int i;
+
+	product_info->max_commands = inquiry->adapter_info.max_commands;
+	enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
+	product_info->nchannels = inquiry->adapter_info.nchannels;
+
+	for (i = 0; i < 4; i++) {
+		product_info->fw_version[i] =
+			inquiry->adapter_info.fw_version[i];
+
+		product_info->bios_version[i] =
+			inquiry->adapter_info.bios_version[i];
+	}
+	enquiry3->cache_flush_interval =
+		inquiry->adapter_info.cache_flush_interval;
+
+	product_info->dram_size = inquiry->adapter_info.dram_size;
+
+	enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
+
+	for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
+		enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
+		enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
+		enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
+	}
+
+	for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
+		enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
+}
+
+static inline void
+mega_free_sgl(adapter_t *adapter)
+{
+	scb_t	*scb;
+	int	i;
+
+	for(i = 0; i < adapter->max_cmds; i++) {
+
+		scb = &adapter->scb_list[i];
+
+		if( scb->sgl64 ) {
+			pci_free_consistent(adapter->dev,
+				sizeof(mega_sgl64) * adapter->sglen,
+				scb->sgl64,
+				scb->sgl_dma_addr);
+
+			scb->sgl64 = NULL;
+		}
+
+		if( scb->pthru ) {
+			pci_free_consistent(adapter->dev, sizeof(mega_passthru),
+				scb->pthru, scb->pthru_dma_addr);
+
+			scb->pthru = NULL;
+		}
+
+		if( scb->epthru ) {
+			pci_free_consistent(adapter->dev,
+				sizeof(mega_ext_passthru),
+				scb->epthru, scb->epthru_dma_addr);
+
+			scb->epthru = NULL;
+		}
+
+	}
+}
+
+
+/*
+ * Get information about the card/driver
+ */
+const char *
+megaraid_info(struct Scsi_Host *host)
+{
+	static char buffer[512];
+	adapter_t *adapter;
+
+	adapter = (adapter_t *)host->hostdata;
+
+	sprintf (buffer,
+		 "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
+		 adapter->fw_version, adapter->product_info.max_commands,
+		 adapter->host->max_id, adapter->host->max_channel,
+		 (u32)adapter->host->max_lun);
+	return buffer;
+}
+
+/*
+ * Abort a previous SCSI request. Only commands on the pending list can be
+ * aborted. All the commands issued to the F/W must complete.
+ */
+static int
+megaraid_abort(Scsi_Cmnd *cmd)
+{
+	adapter_t	*adapter;
+	int		rval;
+
+	adapter = (adapter_t *)cmd->device->host->hostdata;
+
+	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
+
+	/*
+	 * This is required here to complete any completed requests
+	 * to be communicated over to the mid layer.
+	 */
+	mega_rundoneq(adapter);
+
+	return rval;
+}
+
+
+static int
+megaraid_reset(struct scsi_cmnd *cmd)
+{
+	adapter_t	*adapter;
+	megacmd_t	mc;
+	int		rval;
+
+	adapter = (adapter_t *)cmd->device->host->hostdata;
+
+#if MEGA_HAVE_CLUSTERING
+	mc.cmd = MEGA_CLUSTER_CMD;
+	mc.opcode = MEGA_RESET_RESERVATIONS;
+
+	if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
+		printk(KERN_WARNING
+				"megaraid: reservation reset failed.\n");
+	}
+	else {
+		printk(KERN_INFO "megaraid: reservation reset.\n");
+	}
+#endif
+
+	spin_lock_irq(&adapter->lock);
+
+	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
+
+	/*
+	 * This is required here to complete any completed requests
+	 * to be communicated over to the mid layer.
+	 */
+	mega_rundoneq(adapter);
+	spin_unlock_irq(&adapter->lock);
+
+	return rval;
+}
+
+/**
+ * megaraid_abort_and_reset()
+ * @adapter - megaraid soft state
+ * @cmd - scsi command to be aborted or reset
+ * @aor - abort or reset flag
+ *
+ * Try to locate the scsi command in the pending queue. If found and is not
+ * issued to the controller, abort/reset it. Otherwise return failure
+ */
+static int
+megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
+{
+	struct list_head	*pos, *next;
+	scb_t			*scb;
+
+	printk(KERN_WARNING "megaraid: %s cmd=%x <c=%d t=%d l=%d>\n",
+	     (aor == SCB_ABORT)? "ABORTING":"RESET",
+	     cmd->cmnd[0], cmd->device->channel,
+	     cmd->device->id, (u32)cmd->device->lun);
+
+	if(list_empty(&adapter->pending_list))
+		return FAILED;
+
+	list_for_each_safe(pos, next, &adapter->pending_list) {
+
+		scb = list_entry(pos, scb_t, list);
+
+		if (scb->cmd == cmd) { /* Found command */
+
+			scb->state |= aor;
+
+			/*
+			 * Check if this command has firmware ownership. If
+			 * yes, we cannot reset this command. Whenever f/w
+			 * completes this command, we will return appropriate
+			 * status from ISR.
+			 */
+			if( scb->state & SCB_ISSUED ) {
+
+				printk(KERN_WARNING
+					"megaraid: %s[%x], fw owner.\n",
+					(aor==SCB_ABORT) ? "ABORTING":"RESET",
+					scb->idx);
+
+				return FAILED;
+			}
+			else {
+
+				/*
+				 * Not yet issued! Remove from the pending
+				 * list
+				 */
+				printk(KERN_WARNING
+					"megaraid: %s-[%x], driver owner.\n",
+					(aor==SCB_ABORT) ? "ABORTING":"RESET",
+					scb->idx);
+
+				mega_free_scb(adapter, scb);
+
+				if( aor == SCB_ABORT ) {
+					cmd->result = (DID_ABORT << 16);
+				}
+				else {
+					cmd->result = (DID_RESET << 16);
+				}
+
+				list_add_tail(SCSI_LIST(cmd),
+						&adapter->completed_list);
+
+				return SUCCESS;
+			}
+		}
+	}
+
+	return FAILED;
+}
+
+static inline int
+make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
+{
+	*pdev = pci_alloc_dev(NULL);
+
+	if( *pdev == NULL ) return -1;
+
+	memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
+
+	if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
+		kfree(*pdev);
+		return -1;
+	}
+
+	return 0;
+}
+
+static inline void
+free_local_pdev(struct pci_dev *pdev)
+{
+	kfree(pdev);
+}
+
+/**
+ * mega_allocate_inquiry()
+ * @dma_handle - handle returned for dma address
+ * @pdev - handle to pci device
+ *
+ * allocates memory for inquiry structure
+ */
+static inline void *
+mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
+{
+	return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
+}
+
+
+static inline void
+mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
+{
+	pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
+}
+
+
+#ifdef CONFIG_PROC_FS
+/* Following code handles /proc fs  */
+
+/**
+ * proc_show_config()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display configuration information about the controller.
+ */
+static int
+proc_show_config(struct seq_file *m, void *v)
+{
+
+	adapter_t *adapter = m->private;
+
+	seq_puts(m, MEGARAID_VERSION);
+	if(adapter->product_info.product_name[0])
+		seq_printf(m, "%s\n", adapter->product_info.product_name);
+
+	seq_puts(m, "Controller Type: ");
+
+	if( adapter->flag & BOARD_MEMMAP )
+		seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
+	else
+		seq_puts(m, "418/428/434\n");
+
+	if(adapter->flag & BOARD_40LD)
+		seq_puts(m, "Controller Supports 40 Logical Drives\n");
+
+	if(adapter->flag & BOARD_64BIT)
+		seq_puts(m, "Controller capable of 64-bit memory addressing\n");
+	if( adapter->has_64bit_addr )
+		seq_puts(m, "Controller using 64-bit memory addressing\n");
+	else
+		seq_puts(m, "Controller is not using 64-bit memory addressing\n");
+
+	seq_printf(m, "Base = %08lx, Irq = %d, ",
+		   adapter->base, adapter->host->irq);
+
+	seq_printf(m, "Logical Drives = %d, Channels = %d\n",
+		   adapter->numldrv, adapter->product_info.nchannels);
+
+	seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
+		   adapter->fw_version, adapter->bios_version,
+		   adapter->product_info.dram_size);
+
+	seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
+		   adapter->product_info.max_commands, adapter->max_cmds);
+
+	seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
+	seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
+	seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
+	seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
+	seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
+	seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
+	seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
+	seq_printf(m, "quiescent          = %d\n",
+		   atomic_read(&adapter->quiescent));
+	seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
+
+	seq_puts(m, "\nModule Parameters:\n");
+	seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
+	seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
+	return 0;
+}
+
+/**
+ * proc_show_stat()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display statistical information about the I/O activity.
+ */
+static int
+proc_show_stat(struct seq_file *m, void *v)
+{
+	adapter_t *adapter = m->private;
+#if MEGA_HAVE_STATS
+	int	i;
+#endif
+
+	seq_puts(m, "Statistical Information for this controller\n");
+	seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
+#if MEGA_HAVE_STATS
+	for(i = 0; i < adapter->numldrv; i++) {
+		seq_printf(m, "Logical Drive %d:\n", i);
+		seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
+			   adapter->nreads[i], adapter->nwrites[i]);
+		seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
+			   adapter->nreadblocks[i], adapter->nwriteblocks[i]);
+		seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
+			   adapter->rd_errors[i], adapter->wr_errors[i]);
+	}
+#else
+	seq_puts(m, "IO and error counters not compiled in driver.\n");
+#endif
+	return 0;
+}
+
+
+/**
+ * proc_show_mbox()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display mailbox information for the last command issued. This information
+ * is good for debugging.
+ */
+static int
+proc_show_mbox(struct seq_file *m, void *v)
+{
+	adapter_t	*adapter = m->private;
+	volatile mbox_t	*mbox = adapter->mbox;
+
+	seq_puts(m, "Contents of Mail Box Structure\n");
+	seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
+	seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
+	seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
+	seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
+	seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
+	seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
+	seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
+	seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
+	seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
+	return 0;
+}
+
+
+/**
+ * proc_show_rebuild_rate()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display current rebuild rate
+ */
+static int
+proc_show_rebuild_rate(struct seq_file *m, void *v)
+{
+	adapter_t	*adapter = m->private;
+	dma_addr_t	dma_handle;
+	caddr_t		inquiry;
+	struct pci_dev	*pdev;
+
+	if( make_local_pdev(adapter, &pdev) != 0 )
+		return 0;
+
+	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
+		goto free_pdev;
+
+	if( mega_adapinq(adapter, dma_handle) != 0 ) {
+		seq_puts(m, "Adapter inquiry failed.\n");
+		printk(KERN_WARNING "megaraid: inquiry failed.\n");
+		goto free_inquiry;
+	}
+
+	if( adapter->flag & BOARD_40LD )
+		seq_printf(m, "Rebuild Rate: [%d%%]\n",
+			   ((mega_inquiry3 *)inquiry)->rebuild_rate);
+	else
+		seq_printf(m, "Rebuild Rate: [%d%%]\n",
+			((mraid_ext_inquiry *)
+			 inquiry)->raid_inq.adapter_info.rebuild_rate);
+
+free_inquiry:
+	mega_free_inquiry(inquiry, dma_handle, pdev);
+free_pdev:
+	free_local_pdev(pdev);
+	return 0;
+}
+
+
+/**
+ * proc_show_battery()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display information about the battery module on the controller.
+ */
+static int
+proc_show_battery(struct seq_file *m, void *v)
+{
+	adapter_t	*adapter = m->private;
+	dma_addr_t	dma_handle;
+	caddr_t		inquiry;
+	struct pci_dev	*pdev;
+	u8	battery_status;
+
+	if( make_local_pdev(adapter, &pdev) != 0 )
+		return 0;
+
+	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
+		goto free_pdev;
+
+	if( mega_adapinq(adapter, dma_handle) != 0 ) {
+		seq_puts(m, "Adapter inquiry failed.\n");
+		printk(KERN_WARNING "megaraid: inquiry failed.\n");
+		goto free_inquiry;
+	}
+
+	if( adapter->flag & BOARD_40LD ) {
+		battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
+	}
+	else {
+		battery_status = ((mraid_ext_inquiry *)inquiry)->
+			raid_inq.adapter_info.battery_status;
+	}
+
+	/*
+	 * Decode the battery status
+	 */
+	seq_printf(m, "Battery Status:[%d]", battery_status);
+
+	if(battery_status == MEGA_BATT_CHARGE_DONE)
+		seq_puts(m, " Charge Done");
+
+	if(battery_status & MEGA_BATT_MODULE_MISSING)
+		seq_puts(m, " Module Missing");
+	
+	if(battery_status & MEGA_BATT_LOW_VOLTAGE)
+		seq_puts(m, " Low Voltage");
+	
+	if(battery_status & MEGA_BATT_TEMP_HIGH)
+		seq_puts(m, " Temperature High");
+	
+	if(battery_status & MEGA_BATT_PACK_MISSING)
+		seq_puts(m, " Pack Missing");
+	
+	if(battery_status & MEGA_BATT_CHARGE_INPROG)
+		seq_puts(m, " Charge In-progress");
+	
+	if(battery_status & MEGA_BATT_CHARGE_FAIL)
+		seq_puts(m, " Charge Fail");
+	
+	if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
+		seq_puts(m, " Cycles Exceeded");
+
+	seq_putc(m, '\n');
+
+free_inquiry:
+	mega_free_inquiry(inquiry, dma_handle, pdev);
+free_pdev:
+	free_local_pdev(pdev);
+	return 0;
+}
+
+
+/*
+ * Display scsi inquiry
+ */
+static void
+mega_print_inquiry(struct seq_file *m, char *scsi_inq)
+{
+	int	i;
+
+	seq_puts(m, "  Vendor: ");
+	seq_write(m, scsi_inq + 8, 8);
+	seq_puts(m, "  Model: ");
+	seq_write(m, scsi_inq + 16, 16);
+	seq_puts(m, "  Rev: ");
+	seq_write(m, scsi_inq + 32, 4);
+	seq_putc(m, '\n');
+
+	i = scsi_inq[0] & 0x1f;
+	seq_printf(m, "  Type:   %s ", scsi_device_type(i));
+
+	seq_printf(m, "                 ANSI SCSI revision: %02x",
+		   scsi_inq[2] & 0x07);
+
+	if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
+		seq_puts(m, " CCS\n");
+	else
+		seq_putc(m, '\n');
+}
+
+/**
+ * proc_show_pdrv()
+ * @m - Synthetic file construction data
+ * @page - buffer to write the data in
+ * @adapter - pointer to our soft state
+ *
+ * Display information about the physical drives.
+ */
+static int
+proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
+{
+	dma_addr_t	dma_handle;
+	char		*scsi_inq;
+	dma_addr_t	scsi_inq_dma_handle;
+	caddr_t		inquiry;
+	struct pci_dev	*pdev;
+	u8	*pdrv_state;
+	u8	state;
+	int	tgt;
+	int	max_channels;
+	int	i;
+
+	if( make_local_pdev(adapter, &pdev) != 0 )
+		return 0;
+
+	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
+		goto free_pdev;
+
+	if( mega_adapinq(adapter, dma_handle) != 0 ) {
+		seq_puts(m, "Adapter inquiry failed.\n");
+		printk(KERN_WARNING "megaraid: inquiry failed.\n");
+		goto free_inquiry;
+	}
+
+
+	scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
+	if( scsi_inq == NULL ) {
+		seq_puts(m, "memory not available for scsi inq.\n");
+		goto free_inquiry;
+	}
+
+	if( adapter->flag & BOARD_40LD ) {
+		pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
+	}
+	else {
+		pdrv_state = ((mraid_ext_inquiry *)inquiry)->
+			raid_inq.pdrv_info.pdrv_state;
+	}
+
+	max_channels = adapter->product_info.nchannels;
+
+	if( channel >= max_channels ) {
+		goto free_pci;
+	}
+
+	for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
+
+		i = channel*16 + tgt;
+
+		state = *(pdrv_state + i);
+		switch( state & 0x0F ) {
+		case PDRV_ONLINE:
+			seq_printf(m, "Channel:%2d Id:%2d State: Online",
+				   channel, tgt);
+			break;
+
+		case PDRV_FAILED:
+			seq_printf(m, "Channel:%2d Id:%2d State: Failed",
+				   channel, tgt);
+			break;
+
+		case PDRV_RBLD:
+			seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
+				   channel, tgt);
+			break;
+
+		case PDRV_HOTSPARE:
+			seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
+				   channel, tgt);
+			break;
+
+		default:
+			seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
+				   channel, tgt);
+			break;
+		}
+
+		/*
+		 * This interface displays inquiries for disk drives
+		 * only. Inquries for logical drives and non-disk
+		 * devices are available through /proc/scsi/scsi
+		 */
+		memset(scsi_inq, 0, 256);
+		if( mega_internal_dev_inquiry(adapter, channel, tgt,
+				scsi_inq_dma_handle) ||
+				(scsi_inq[0] & 0x1F) != TYPE_DISK ) {
+			continue;
+		}
+
+		/*
+		 * Check for overflow. We print less than 240
+		 * characters for inquiry
+		 */
+		seq_puts(m, ".\n");
+		mega_print_inquiry(m, scsi_inq);
+	}
+
+free_pci:
+	pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
+free_inquiry:
+	mega_free_inquiry(inquiry, dma_handle, pdev);
+free_pdev:
+	free_local_pdev(pdev);
+	return 0;
+}
+
+/**
+ * proc_show_pdrv_ch0()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display information about the physical drives on physical channel 0.
+ */
+static int
+proc_show_pdrv_ch0(struct seq_file *m, void *v)
+{
+	return proc_show_pdrv(m, m->private, 0);
+}
+
+
+/**
+ * proc_show_pdrv_ch1()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display information about the physical drives on physical channel 1.
+ */
+static int
+proc_show_pdrv_ch1(struct seq_file *m, void *v)
+{
+	return proc_show_pdrv(m, m->private, 1);
+}
+
+
+/**
+ * proc_show_pdrv_ch2()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display information about the physical drives on physical channel 2.
+ */
+static int
+proc_show_pdrv_ch2(struct seq_file *m, void *v)
+{
+	return proc_show_pdrv(m, m->private, 2);
+}
+
+
+/**
+ * proc_show_pdrv_ch3()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display information about the physical drives on physical channel 3.
+ */
+static int
+proc_show_pdrv_ch3(struct seq_file *m, void *v)
+{
+	return proc_show_pdrv(m, m->private, 3);
+}
+
+
+/**
+ * proc_show_rdrv()
+ * @m - Synthetic file construction data
+ * @adapter - pointer to our soft state
+ * @start - starting logical drive to display
+ * @end - ending logical drive to display
+ *
+ * We do not print the inquiry information since its already available through
+ * /proc/scsi/scsi interface
+ */
+static int
+proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
+{
+	dma_addr_t	dma_handle;
+	logdrv_param	*lparam;
+	megacmd_t	mc;
+	char		*disk_array;
+	dma_addr_t	disk_array_dma_handle;
+	caddr_t		inquiry;
+	struct pci_dev	*pdev;
+	u8	*rdrv_state;
+	int	num_ldrv;
+	u32	array_sz;
+	int	i;
+
+	if( make_local_pdev(adapter, &pdev) != 0 )
+		return 0;
+
+	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
+		goto free_pdev;
+
+	if( mega_adapinq(adapter, dma_handle) != 0 ) {
+		seq_puts(m, "Adapter inquiry failed.\n");
+		printk(KERN_WARNING "megaraid: inquiry failed.\n");
+		goto free_inquiry;
+	}
+
+	memset(&mc, 0, sizeof(megacmd_t));
+
+	if( adapter->flag & BOARD_40LD ) {
+		array_sz = sizeof(disk_array_40ld);
+
+		rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
+
+		num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
+	}
+	else {
+		array_sz = sizeof(disk_array_8ld);
+
+		rdrv_state = ((mraid_ext_inquiry *)inquiry)->
+			raid_inq.logdrv_info.ldrv_state;
+
+		num_ldrv = ((mraid_ext_inquiry *)inquiry)->
+			raid_inq.logdrv_info.num_ldrv;
+	}
+
+	disk_array = pci_alloc_consistent(pdev, array_sz,
+			&disk_array_dma_handle);
+
+	if( disk_array == NULL ) {
+		seq_puts(m, "memory not available.\n");
+		goto free_inquiry;
+	}
+
+	mc.xferaddr = (u32)disk_array_dma_handle;
+
+	if( adapter->flag & BOARD_40LD ) {
+		mc.cmd = FC_NEW_CONFIG;
+		mc.opcode = OP_DCMD_READ_CONFIG;
+
+		if( mega_internal_command(adapter, &mc, NULL) ) {
+			seq_puts(m, "40LD read config failed.\n");
+			goto free_pci;
+		}
+
+	}
+	else {
+		mc.cmd = NEW_READ_CONFIG_8LD;
+
+		if( mega_internal_command(adapter, &mc, NULL) ) {
+			mc.cmd = READ_CONFIG_8LD;
+			if( mega_internal_command(adapter, &mc, NULL) ) {
+				seq_puts(m, "8LD read config failed.\n");
+				goto free_pci;
+			}
+		}
+	}
+
+	for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
+
+		if( adapter->flag & BOARD_40LD ) {
+			lparam =
+			&((disk_array_40ld *)disk_array)->ldrv[i].lparam;
+		}
+		else {
+			lparam =
+			&((disk_array_8ld *)disk_array)->ldrv[i].lparam;
+		}
+
+		/*
+		 * Check for overflow. We print less than 240 characters for
+		 * information about each logical drive.
+		 */
+		seq_printf(m, "Logical drive:%2d:, ", i);
+
+		switch( rdrv_state[i] & 0x0F ) {
+		case RDRV_OFFLINE:
+			seq_puts(m, "state: offline");
+			break;
+		case RDRV_DEGRADED:
+			seq_puts(m, "state: degraded");
+			break;
+		case RDRV_OPTIMAL:
+			seq_puts(m, "state: optimal");
+			break;
+		case RDRV_DELETED:
+			seq_puts(m, "state: deleted");
+			break;
+		default:
+			seq_puts(m, "state: unknown");
+			break;
+		}
+
+		/*
+		 * Check if check consistency or initialization is going on
+		 * for this logical drive.
+		 */
+		if( (rdrv_state[i] & 0xF0) == 0x20 )
+			seq_puts(m, ", check-consistency in progress");
+		else if( (rdrv_state[i] & 0xF0) == 0x10 )
+			seq_puts(m, ", initialization in progress");
+		
+		seq_putc(m, '\n');
+
+		seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
+		seq_printf(m, "RAID level:%3d, ", lparam->level);
+		seq_printf(m, "Stripe size:%3d, ",
+			   lparam->stripe_sz ? lparam->stripe_sz/2: 128);
+		seq_printf(m, "Row size:%3d\n", lparam->row_size);
+
+		seq_puts(m, "Read Policy: ");
+		switch(lparam->read_ahead) {
+		case NO_READ_AHEAD:
+			seq_puts(m, "No read ahead, ");
+			break;
+		case READ_AHEAD:
+			seq_puts(m, "Read ahead, ");
+			break;
+		case ADAP_READ_AHEAD:
+			seq_puts(m, "Adaptive, ");
+			break;
+
+		}
+
+		seq_puts(m, "Write Policy: ");
+		switch(lparam->write_mode) {
+		case WRMODE_WRITE_THRU:
+			seq_puts(m, "Write thru, ");
+			break;
+		case WRMODE_WRITE_BACK:
+			seq_puts(m, "Write back, ");
+			break;
+		}
+
+		seq_puts(m, "Cache Policy: ");
+		switch(lparam->direct_io) {
+		case CACHED_IO:
+			seq_puts(m, "Cached IO\n\n");
+			break;
+		case DIRECT_IO:
+			seq_puts(m, "Direct IO\n\n");
+			break;
+		}
+	}
+
+free_pci:
+	pci_free_consistent(pdev, array_sz, disk_array,
+			disk_array_dma_handle);
+free_inquiry:
+	mega_free_inquiry(inquiry, dma_handle, pdev);
+free_pdev:
+	free_local_pdev(pdev);
+	return 0;
+}
+
+/**
+ * proc_show_rdrv_10()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_show_rdrv_10(struct seq_file *m, void *v)
+{
+	return proc_show_rdrv(m, m->private, 0, 9);
+}
+
+
+/**
+ * proc_show_rdrv_20()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_show_rdrv_20(struct seq_file *m, void *v)
+{
+	return proc_show_rdrv(m, m->private, 10, 19);
+}
+
+
+/**
+ * proc_show_rdrv_30()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_show_rdrv_30(struct seq_file *m, void *v)
+{
+	return proc_show_rdrv(m, m->private, 20, 29);
+}
+
+
+/**
+ * proc_show_rdrv_40()
+ * @m - Synthetic file construction data
+ * @v - File iterator
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_show_rdrv_40(struct seq_file *m, void *v)
+{
+	return proc_show_rdrv(m, m->private, 30, 39);
+}
+
+
+/*
+ * seq_file wrappers for procfile show routines.
+ */
+static int mega_proc_open(struct inode *inode, struct file *file)
+{
+	adapter_t *adapter = proc_get_parent_data(inode);
+	int (*show)(struct seq_file *, void *) = PDE_DATA(inode);
+
+	return single_open(file, show, adapter);
+}
+
+static const struct file_operations mega_proc_fops = {
+	.open		= mega_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+/*
+ * Table of proc files we need to create.
+ */
+struct mega_proc_file {
+	const char *name;
+	unsigned short ptr_offset;
+	int (*show) (struct seq_file *m, void *v);
+};
+
+static const struct mega_proc_file mega_proc_files[] = {
+	{ "config",	      offsetof(adapter_t, proc_read), proc_show_config },
+	{ "stat",	      offsetof(adapter_t, proc_stat), proc_show_stat },
+	{ "mailbox",	      offsetof(adapter_t, proc_mbox), proc_show_mbox },
+#if MEGA_HAVE_ENH_PROC
+	{ "rebuild-rate",     offsetof(adapter_t, proc_rr), proc_show_rebuild_rate },
+	{ "battery-status",   offsetof(adapter_t, proc_battery), proc_show_battery },
+	{ "diskdrives-ch0",   offsetof(adapter_t, proc_pdrvstat[0]), proc_show_pdrv_ch0 },
+	{ "diskdrives-ch1",   offsetof(adapter_t, proc_pdrvstat[1]), proc_show_pdrv_ch1 },
+	{ "diskdrives-ch2",   offsetof(adapter_t, proc_pdrvstat[2]), proc_show_pdrv_ch2 },
+	{ "diskdrives-ch3",   offsetof(adapter_t, proc_pdrvstat[3]), proc_show_pdrv_ch3 },
+	{ "raiddrives-0-9",   offsetof(adapter_t, proc_rdrvstat[0]), proc_show_rdrv_10 },
+	{ "raiddrives-10-19", offsetof(adapter_t, proc_rdrvstat[1]), proc_show_rdrv_20 },
+	{ "raiddrives-20-29", offsetof(adapter_t, proc_rdrvstat[2]), proc_show_rdrv_30 },
+	{ "raiddrives-30-39", offsetof(adapter_t, proc_rdrvstat[3]), proc_show_rdrv_40 },
+#endif
+	{ NULL }
+};
+
+/**
+ * mega_create_proc_entry()
+ * @index - index in soft state array
+ * @parent - parent node for this /proc entry
+ *
+ * Creates /proc entries for our controllers.
+ */
+static void
+mega_create_proc_entry(int index, struct proc_dir_entry *parent)
+{
+	const struct mega_proc_file *f;
+	adapter_t	*adapter = hba_soft_state[index];
+	struct proc_dir_entry	*dir, *de, **ppde;
+	u8		string[16];
+
+	sprintf(string, "hba%d", adapter->host->host_no);
+
+	dir = adapter->controller_proc_dir_entry =
+		proc_mkdir_data(string, 0, parent, adapter);
+	if(!dir) {
+		printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
+		return;
+	}
+
+	for (f = mega_proc_files; f->name; f++) {
+		de = proc_create_data(f->name, S_IRUSR, dir, &mega_proc_fops,
+				      f->show);
+		if (!de) {
+			printk(KERN_WARNING "\nmegaraid: proc_create failed\n");
+			return;
+		}
+
+		ppde = (void *)adapter + f->ptr_offset;
+		*ppde = de;
+	}
+}
+
+#else
+static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
+{
+}
+#endif
+
+
+/**
+ * megaraid_biosparam()
+ *
+ * Return the disk geometry for a particular disk
+ */
+static int
+megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
+		    sector_t capacity, int geom[])
+{
+	adapter_t	*adapter;
+	unsigned char	*bh;
+	int	heads;
+	int	sectors;
+	int	cylinders;
+	int	rval;
+
+	/* Get pointer to host config structure */
+	adapter = (adapter_t *)sdev->host->hostdata;
+
+	if (IS_RAID_CH(adapter, sdev->channel)) {
+			/* Default heads (64) & sectors (32) */
+			heads = 64;
+			sectors = 32;
+			cylinders = (ulong)capacity / (heads * sectors);
+
+			/*
+			 * Handle extended translation size for logical drives
+			 * > 1Gb
+			 */
+			if ((ulong)capacity >= 0x200000) {
+				heads = 255;
+				sectors = 63;
+				cylinders = (ulong)capacity / (heads * sectors);
+			}
+
+			/* return result */
+			geom[0] = heads;
+			geom[1] = sectors;
+			geom[2] = cylinders;
+	}
+	else {
+		bh = scsi_bios_ptable(bdev);
+
+		if( bh ) {
+			rval = scsi_partsize(bh, capacity,
+					    &geom[2], &geom[0], &geom[1]);
+			kfree(bh);
+			if( rval != -1 )
+				return rval;
+		}
+
+		printk(KERN_INFO
+		"megaraid: invalid partition on this disk on channel %d\n",
+				sdev->channel);
+
+		/* Default heads (64) & sectors (32) */
+		heads = 64;
+		sectors = 32;
+		cylinders = (ulong)capacity / (heads * sectors);
+
+		/* Handle extended translation size for logical drives > 1Gb */
+		if ((ulong)capacity >= 0x200000) {
+			heads = 255;
+			sectors = 63;
+			cylinders = (ulong)capacity / (heads * sectors);
+		}
+
+		/* return result */
+		geom[0] = heads;
+		geom[1] = sectors;
+		geom[2] = cylinders;
+	}
+
+	return 0;
+}
+
+/**
+ * mega_init_scb()
+ * @adapter - pointer to our soft state
+ *
+ * Allocate memory for the various pointers in the scb structures:
+ * scatter-gather list pointer, passthru and extended passthru structure
+ * pointers.
+ */
+static int
+mega_init_scb(adapter_t *adapter)
+{
+	scb_t	*scb;
+	int	i;
+
+	for( i = 0; i < adapter->max_cmds; i++ ) {
+
+		scb = &adapter->scb_list[i];
+
+		scb->sgl64 = NULL;
+		scb->sgl = NULL;
+		scb->pthru = NULL;
+		scb->epthru = NULL;
+	}
+
+	for( i = 0; i < adapter->max_cmds; i++ ) {
+
+		scb = &adapter->scb_list[i];
+
+		scb->idx = i;
+
+		scb->sgl64 = pci_alloc_consistent(adapter->dev,
+				sizeof(mega_sgl64) * adapter->sglen,
+				&scb->sgl_dma_addr);
+
+		scb->sgl = (mega_sglist *)scb->sgl64;
+
+		if( !scb->sgl ) {
+			printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
+			mega_free_sgl(adapter);
+			return -1;
+		}
+
+		scb->pthru = pci_alloc_consistent(adapter->dev,
+				sizeof(mega_passthru),
+				&scb->pthru_dma_addr);
+
+		if( !scb->pthru ) {
+			printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
+			mega_free_sgl(adapter);
+			return -1;
+		}
+
+		scb->epthru = pci_alloc_consistent(adapter->dev,
+				sizeof(mega_ext_passthru),
+				&scb->epthru_dma_addr);
+
+		if( !scb->epthru ) {
+			printk(KERN_WARNING
+				"Can't allocate extended passthru.\n");
+			mega_free_sgl(adapter);
+			return -1;
+		}
+
+
+		scb->dma_type = MEGA_DMA_TYPE_NONE;
+
+		/*
+		 * Link to free list
+		 * lock not required since we are loading the driver, so no
+		 * commands possible right now.
+		 */
+		scb->state = SCB_FREE;
+		scb->cmd = NULL;
+		list_add(&scb->list, &adapter->free_list);
+	}
+
+	return 0;
+}
+
+
+/**
+ * megadev_open()
+ * @inode - unused
+ * @filep - unused
+ *
+ * Routines for the character/ioctl interface to the driver. Find out if this
+ * is a valid open. 
+ */
+static int
+megadev_open (struct inode *inode, struct file *filep)
+{
+	/*
+	 * Only allow superuser to access private ioctl interface
+	 */
+	if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
+
+	return 0;
+}
+
+
+/**
+ * megadev_ioctl()
+ * @inode - Our device inode
+ * @filep - unused
+ * @cmd - ioctl command
+ * @arg - user buffer
+ *
+ * ioctl entry point for our private ioctl interface. We move the data in from
+ * the user space, prepare the command (if necessary, convert the old MIMD
+ * ioctl to new ioctl command), and issue a synchronous command to the
+ * controller.
+ */
+static int
+megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
+{
+	adapter_t	*adapter;
+	nitioctl_t	uioc;
+	int		adapno;
+	int		rval;
+	mega_passthru	__user *upthru;	/* user address for passthru */
+	mega_passthru	*pthru;		/* copy user passthru here */
+	dma_addr_t	pthru_dma_hndl;
+	void		*data = NULL;	/* data to be transferred */
+	dma_addr_t	data_dma_hndl;	/* dma handle for data xfer area */
+	megacmd_t	mc;
+	megastat_t	__user *ustats;
+	int		num_ldrv;
+	u32		uxferaddr = 0;
+	struct pci_dev	*pdev;
+
+	ustats = NULL; /* avoid compilation warnings */
+	num_ldrv = 0;
+
+	/*
+	 * Make sure only USCSICMD are issued through this interface.
+	 * MIMD application would still fire different command.
+	 */
+	if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
+		return -EINVAL;
+	}
+
+	/*
+	 * Check and convert a possible MIMD command to NIT command.
+	 * mega_m_to_n() copies the data from the user space, so we do not
+	 * have to do it here.
+	 * NOTE: We will need some user address to copyout the data, therefore
+	 * the inteface layer will also provide us with the required user
+	 * addresses.
+	 */
+	memset(&uioc, 0, sizeof(nitioctl_t));
+	if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
+		return rval;
+
+
+	switch( uioc.opcode ) {
+
+	case GET_DRIVER_VER:
+		if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
+			return (-EFAULT);
+
+		break;
+
+	case GET_N_ADAP:
+		if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
+			return (-EFAULT);
+
+		/*
+		 * Shucks. MIMD interface returns a positive value for number
+		 * of adapters. TODO: Change it to return 0 when there is no
+		 * applicatio using mimd interface.
+		 */
+		return hba_count;
+
+	case GET_ADAP_INFO:
+
+		/*
+		 * Which adapter
+		 */
+		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
+			return (-ENODEV);
+
+		if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
+				sizeof(struct mcontroller)) )
+			return (-EFAULT);
+		break;
+
+#if MEGA_HAVE_STATS
+
+	case GET_STATS:
+		/*
+		 * Which adapter
+		 */
+		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
+			return (-ENODEV);
+
+		adapter = hba_soft_state[adapno];
+
+		ustats = uioc.uioc_uaddr;
+
+		if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
+			return (-EFAULT);
+
+		/*
+		 * Check for the validity of the logical drive number
+		 */
+		if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
+
+		if( copy_to_user(ustats->nreads, adapter->nreads,
+					num_ldrv*sizeof(u32)) )
+			return -EFAULT;
+
+		if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
+					num_ldrv*sizeof(u32)) )
+			return -EFAULT;
+
+		if( copy_to_user(ustats->nwrites, adapter->nwrites,
+					num_ldrv*sizeof(u32)) )
+			return -EFAULT;
+
+		if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
+					num_ldrv*sizeof(u32)) )
+			return -EFAULT;
+
+		if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
+					num_ldrv*sizeof(u32)) )
+			return -EFAULT;
+
+		if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
+					num_ldrv*sizeof(u32)) )
+			return -EFAULT;
+
+		return 0;
+
+#endif
+	case MBOX_CMD:
+
+		/*
+		 * Which adapter
+		 */
+		if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
+			return (-ENODEV);
+
+		adapter = hba_soft_state[adapno];
+
+		/*
+		 * Deletion of logical drive is a special case. The adapter
+		 * should be quiescent before this command is issued.
+		 */
+		if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
+				uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
+
+			/*
+			 * Do we support this feature
+			 */
+			if( !adapter->support_random_del ) {
+				printk(KERN_WARNING "megaraid: logdrv ");
+				printk("delete on non-supporting F/W.\n");
+
+				return (-EINVAL);
+			}
+
+			rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
+
+			if( rval == 0 ) {
+				memset(&mc, 0, sizeof(megacmd_t));
+
+				mc.status = rval;
+
+				rval = mega_n_to_m((void __user *)arg, &mc);
+			}
+
+			return rval;
+		}
+		/*
+		 * This interface only support the regular passthru commands.
+		 * Reject extended passthru and 64-bit passthru
+		 */
+		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
+			uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
+
+			printk(KERN_WARNING "megaraid: rejected passthru.\n");
+
+			return (-EINVAL);
+		}
+
+		/*
+		 * For all internal commands, the buffer must be allocated in
+		 * <4GB address range
+		 */
+		if( make_local_pdev(adapter, &pdev) != 0 )
+			return -EIO;
+
+		/* Is it a passthru command or a DCMD */
+		if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
+			/* Passthru commands */
+
+			pthru = pci_alloc_consistent(pdev,
+					sizeof(mega_passthru),
+					&pthru_dma_hndl);
+
+			if( pthru == NULL ) {
+				free_local_pdev(pdev);
+				return (-ENOMEM);
+			}
+
+			/*
+			 * The user passthru structure
+			 */
+			upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
+
+			/*
+			 * Copy in the user passthru here.
+			 */
+			if( copy_from_user(pthru, upthru,
+						sizeof(mega_passthru)) ) {
+
+				pci_free_consistent(pdev,
+						sizeof(mega_passthru), pthru,
+						pthru_dma_hndl);
+
+				free_local_pdev(pdev);
+
+				return (-EFAULT);
+			}
+
+			/*
+			 * Is there a data transfer
+			 */
+			if( pthru->dataxferlen ) {
+				data = pci_alloc_consistent(pdev,
+						pthru->dataxferlen,
+						&data_dma_hndl);
+
+				if( data == NULL ) {
+					pci_free_consistent(pdev,
+							sizeof(mega_passthru),
+							pthru,
+							pthru_dma_hndl);
+
+					free_local_pdev(pdev);
+
+					return (-ENOMEM);
+				}
+
+				/*
+				 * Save the user address and point the kernel
+				 * address at just allocated memory
+				 */
+				uxferaddr = pthru->dataxferaddr;
+				pthru->dataxferaddr = data_dma_hndl;
+			}
+
+
+			/*
+			 * Is data coming down-stream
+			 */
+			if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
+				/*
+				 * Get the user data
+				 */
+				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
+							pthru->dataxferlen) ) {
+					rval = (-EFAULT);
+					goto freemem_and_return;
+				}
+			}
+
+			memset(&mc, 0, sizeof(megacmd_t));
+
+			mc.cmd = MEGA_MBOXCMD_PASSTHRU;
+			mc.xferaddr = (u32)pthru_dma_hndl;
+
+			/*
+			 * Issue the command
+			 */
+			mega_internal_command(adapter, &mc, pthru);
+
+			rval = mega_n_to_m((void __user *)arg, &mc);
+
+			if( rval ) goto freemem_and_return;
+
+
+			/*
+			 * Is data going up-stream
+			 */
+			if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
+				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
+							pthru->dataxferlen) ) {
+					rval = (-EFAULT);
+				}
+			}
+
+			/*
+			 * Send the request sense data also, irrespective of
+			 * whether the user has asked for it or not.
+			 */
+			if (copy_to_user(upthru->reqsensearea,
+					pthru->reqsensearea, 14))
+				rval = -EFAULT;
+
+freemem_and_return:
+			if( pthru->dataxferlen ) {
+				pci_free_consistent(pdev,
+						pthru->dataxferlen, data,
+						data_dma_hndl);
+			}
+
+			pci_free_consistent(pdev, sizeof(mega_passthru),
+					pthru, pthru_dma_hndl);
+
+			free_local_pdev(pdev);
+
+			return rval;
+		}
+		else {
+			/* DCMD commands */
+
+			/*
+			 * Is there a data transfer
+			 */
+			if( uioc.xferlen ) {
+				data = pci_alloc_consistent(pdev,
+						uioc.xferlen, &data_dma_hndl);
+
+				if( data == NULL ) {
+					free_local_pdev(pdev);
+					return (-ENOMEM);
+				}
+
+				uxferaddr = MBOX(uioc)->xferaddr;
+			}
+
+			/*
+			 * Is data coming down-stream
+			 */
+			if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
+				/*
+				 * Get the user data
+				 */
+				if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
+							uioc.xferlen) ) {
+
+					pci_free_consistent(pdev,
+							uioc.xferlen,
+							data, data_dma_hndl);
+
+					free_local_pdev(pdev);
+
+					return (-EFAULT);
+				}
+			}
+
+			memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
+
+			mc.xferaddr = (u32)data_dma_hndl;
+
+			/*
+			 * Issue the command
+			 */
+			mega_internal_command(adapter, &mc, NULL);
+
+			rval = mega_n_to_m((void __user *)arg, &mc);
+
+			if( rval ) {
+				if( uioc.xferlen ) {
+					pci_free_consistent(pdev,
+							uioc.xferlen, data,
+							data_dma_hndl);
+				}
+
+				free_local_pdev(pdev);
+
+				return rval;
+			}
+
+			/*
+			 * Is data going up-stream
+			 */
+			if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
+				if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
+							uioc.xferlen) ) {
+
+					rval = (-EFAULT);
+				}
+			}
+
+			if( uioc.xferlen ) {
+				pci_free_consistent(pdev,
+						uioc.xferlen, data,
+						data_dma_hndl);
+			}
+
+			free_local_pdev(pdev);
+
+			return rval;
+		}
+
+	default:
+		return (-EINVAL);
+	}
+
+	return 0;
+}
+
+static long
+megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	mutex_lock(&megadev_mutex);
+	ret = megadev_ioctl(filep, cmd, arg);
+	mutex_unlock(&megadev_mutex);
+
+	return ret;
+}
+
+/**
+ * mega_m_to_n()
+ * @arg - user address
+ * @uioc - new ioctl structure
+ *
+ * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
+ * structure
+ *
+ * Converts the older mimd ioctl structure to newer NIT structure
+ */
+static int
+mega_m_to_n(void __user *arg, nitioctl_t *uioc)
+{
+	struct uioctl_t	uioc_mimd;
+	char	signature[8] = {0};
+	u8	opcode;
+	u8	subopcode;
+
+
+	/*
+	 * check is the application conforms to NIT. We do not have to do much
+	 * in that case.
+	 * We exploit the fact that the signature is stored in the very
+	 * beginning of the structure.
+	 */
+
+	if( copy_from_user(signature, arg, 7) )
+		return (-EFAULT);
+
+	if( memcmp(signature, "MEGANIT", 7) == 0 ) {
+
+		/*
+		 * NOTE NOTE: The nit ioctl is still under flux because of
+		 * change of mailbox definition, in HPE. No applications yet
+		 * use this interface and let's not have applications use this
+		 * interface till the new specifitions are in place.
+		 */
+		return -EINVAL;
+#if 0
+		if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
+			return (-EFAULT);
+		return 0;
+#endif
+	}
+
+	/*
+	 * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
+	 *
+	 * Get the user ioctl structure
+	 */
+	if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
+		return (-EFAULT);
+
+
+	/*
+	 * Get the opcode and subopcode for the commands
+	 */
+	opcode = uioc_mimd.ui.fcs.opcode;
+	subopcode = uioc_mimd.ui.fcs.subopcode;
+
+	switch (opcode) {
+	case 0x82:
+
+		switch (subopcode) {
+
+		case MEGAIOC_QDRVRVER:	/* Query driver version */
+			uioc->opcode = GET_DRIVER_VER;
+			uioc->uioc_uaddr = uioc_mimd.data;
+			break;
+
+		case MEGAIOC_QNADAP:	/* Get # of adapters */
+			uioc->opcode = GET_N_ADAP;
+			uioc->uioc_uaddr = uioc_mimd.data;
+			break;
+
+		case MEGAIOC_QADAPINFO:	/* Get adapter information */
+			uioc->opcode = GET_ADAP_INFO;
+			uioc->adapno = uioc_mimd.ui.fcs.adapno;
+			uioc->uioc_uaddr = uioc_mimd.data;
+			break;
+
+		default:
+			return(-EINVAL);
+		}
+
+		break;
+
+
+	case 0x81:
+
+		uioc->opcode = MBOX_CMD;
+		uioc->adapno = uioc_mimd.ui.fcs.adapno;
+
+		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
+
+		uioc->xferlen = uioc_mimd.ui.fcs.length;
+
+		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
+		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
+
+		break;
+
+	case 0x80:
+
+		uioc->opcode = MBOX_CMD;
+		uioc->adapno = uioc_mimd.ui.fcs.adapno;
+
+		memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
+
+		/*
+		 * Choose the xferlen bigger of input and output data
+		 */
+		uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
+			uioc_mimd.outlen : uioc_mimd.inlen;
+
+		if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
+		if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
+
+		break;
+
+	default:
+		return (-EINVAL);
+
+	}
+
+	return 0;
+}
+
+/*
+ * mega_n_to_m()
+ * @arg - user address
+ * @mc - mailbox command
+ *
+ * Updates the status information to the application, depending on application
+ * conforms to older mimd ioctl interface or newer NIT ioctl interface
+ */
+static int
+mega_n_to_m(void __user *arg, megacmd_t *mc)
+{
+	nitioctl_t	__user *uiocp;
+	megacmd_t	__user *umc;
+	mega_passthru	__user *upthru;
+	struct uioctl_t	__user *uioc_mimd;
+	char	signature[8] = {0};
+
+	/*
+	 * check is the application conforms to NIT.
+	 */
+	if( copy_from_user(signature, arg, 7) )
+		return -EFAULT;
+
+	if( memcmp(signature, "MEGANIT", 7) == 0 ) {
+
+		uiocp = arg;
+
+		if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
+			return (-EFAULT);
+
+		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
+
+			umc = MBOX_P(uiocp);
+
+			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
+				return -EFAULT;
+
+			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
+				return (-EFAULT);
+		}
+	}
+	else {
+		uioc_mimd = arg;
+
+		if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
+			return (-EFAULT);
+
+		if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
+
+			umc = (megacmd_t __user *)uioc_mimd->mbox;
+
+			if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
+				return (-EFAULT);
+
+			if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
+				return (-EFAULT);
+		}
+	}
+
+	return 0;
+}
+
+
+/*
+ * MEGARAID 'FW' commands.
+ */
+
+/**
+ * mega_is_bios_enabled()
+ * @adapter - pointer to our soft state
+ *
+ * issue command to find out if the BIOS is enabled for this controller
+ */
+static int
+mega_is_bios_enabled(adapter_t *adapter)
+{
+	unsigned char	raw_mbox[sizeof(struct mbox_out)];
+	mbox_t	*mbox;
+	int	ret;
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+	raw_mbox[0] = IS_BIOS_ENABLED;
+	raw_mbox[2] = GET_BIOS;
+
+
+	ret = issue_scb_block(adapter, raw_mbox);
+
+	return *(char *)adapter->mega_buffer;
+}
+
+
+/**
+ * mega_enum_raid_scsi()
+ * @adapter - pointer to our soft state
+ *
+ * Find out what channels are RAID/SCSI. This information is used to
+ * differentiate the virtual channels and physical channels and to support
+ * ROMB feature and non-disk devices.
+ */
+static void
+mega_enum_raid_scsi(adapter_t *adapter)
+{
+	unsigned char raw_mbox[sizeof(struct mbox_out)];
+	mbox_t *mbox;
+	int i;
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+	/*
+	 * issue command to find out what channels are raid/scsi
+	 */
+	raw_mbox[0] = CHNL_CLASS;
+	raw_mbox[2] = GET_CHNL_CLASS;
+
+	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+	/*
+	 * Non-ROMB firmware fail this command, so all channels
+	 * must be shown RAID
+	 */
+	adapter->mega_ch_class = 0xFF;
+
+	if(!issue_scb_block(adapter, raw_mbox)) {
+		adapter->mega_ch_class = *((char *)adapter->mega_buffer);
+
+	}
+
+	for( i = 0; i < adapter->product_info.nchannels; i++ ) { 
+		if( (adapter->mega_ch_class >> i) & 0x01 ) {
+			printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
+					i);
+		}
+		else {
+			printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
+					i);
+		}
+	}
+
+	return;
+}
+
+
+/**
+ * mega_get_boot_drv()
+ * @adapter - pointer to our soft state
+ *
+ * Find out which device is the boot device. Note, any logical drive or any
+ * phyical device (e.g., a CDROM) can be designated as a boot device.
+ */
+static void
+mega_get_boot_drv(adapter_t *adapter)
+{
+	struct private_bios_data	*prv_bios_data;
+	unsigned char	raw_mbox[sizeof(struct mbox_out)];
+	mbox_t	*mbox;
+	u16	cksum = 0;
+	u8	*cksum_p;
+	u8	boot_pdrv;
+	int	i;
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+	raw_mbox[0] = BIOS_PVT_DATA;
+	raw_mbox[2] = GET_BIOS_PVT_DATA;
+
+	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+	adapter->boot_ldrv_enabled = 0;
+	adapter->boot_ldrv = 0;
+
+	adapter->boot_pdrv_enabled = 0;
+	adapter->boot_pdrv_ch = 0;
+	adapter->boot_pdrv_tgt = 0;
+
+	if(issue_scb_block(adapter, raw_mbox) == 0) {
+		prv_bios_data =
+			(struct private_bios_data *)adapter->mega_buffer;
+
+		cksum = 0;
+		cksum_p = (char *)prv_bios_data;
+		for (i = 0; i < 14; i++ ) {
+			cksum += (u16)(*cksum_p++);
+		}
+
+		if (prv_bios_data->cksum == (u16)(0-cksum) ) {
+
+			/*
+			 * If MSB is set, a physical drive is set as boot
+			 * device
+			 */
+			if( prv_bios_data->boot_drv & 0x80 ) {
+				adapter->boot_pdrv_enabled = 1;
+				boot_pdrv = prv_bios_data->boot_drv & 0x7F;
+				adapter->boot_pdrv_ch = boot_pdrv / 16;
+				adapter->boot_pdrv_tgt = boot_pdrv % 16;
+			}
+			else {
+				adapter->boot_ldrv_enabled = 1;
+				adapter->boot_ldrv = prv_bios_data->boot_drv;
+			}
+		}
+	}
+
+}
+
+/**
+ * mega_support_random_del()
+ * @adapter - pointer to our soft state
+ *
+ * Find out if this controller supports random deletion and addition of
+ * logical drives
+ */
+static int
+mega_support_random_del(adapter_t *adapter)
+{
+	unsigned char raw_mbox[sizeof(struct mbox_out)];
+	mbox_t *mbox;
+	int rval;
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+	/*
+	 * issue command
+	 */
+	raw_mbox[0] = FC_DEL_LOGDRV;
+	raw_mbox[2] = OP_SUP_DEL_LOGDRV;
+
+	rval = issue_scb_block(adapter, raw_mbox);
+
+	return !rval;
+}
+
+
+/**
+ * mega_support_ext_cdb()
+ * @adapter - pointer to our soft state
+ *
+ * Find out if this firmware support cdblen > 10
+ */
+static int
+mega_support_ext_cdb(adapter_t *adapter)
+{
+	unsigned char raw_mbox[sizeof(struct mbox_out)];
+	mbox_t *mbox;
+	int rval;
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+	/*
+	 * issue command to find out if controller supports extended CDBs.
+	 */
+	raw_mbox[0] = 0xA4;
+	raw_mbox[2] = 0x16;
+
+	rval = issue_scb_block(adapter, raw_mbox);
+
+	return !rval;
+}
+
+
+/**
+ * mega_del_logdrv()
+ * @adapter - pointer to our soft state
+ * @logdrv - logical drive to be deleted
+ *
+ * Delete the specified logical drive. It is the responsibility of the user
+ * app to let the OS know about this operation.
+ */
+static int
+mega_del_logdrv(adapter_t *adapter, int logdrv)
+{
+	unsigned long flags;
+	scb_t *scb;
+	int rval;
+
+	/*
+	 * Stop sending commands to the controller, queue them internally.
+	 * When deletion is complete, ISR will flush the queue.
+	 */
+	atomic_set(&adapter->quiescent, 1);
+
+	/*
+	 * Wait till all the issued commands are complete and there are no
+	 * commands in the pending queue
+	 */
+	while (atomic_read(&adapter->pend_cmds) > 0 ||
+	       !list_empty(&adapter->pending_list))
+		msleep(1000);	/* sleep for 1s */
+
+	rval = mega_do_del_logdrv(adapter, logdrv);
+
+	spin_lock_irqsave(&adapter->lock, flags);
+
+	/*
+	 * If delete operation was successful, add 0x80 to the logical drive
+	 * ids for commands in the pending queue.
+	 */
+	if (adapter->read_ldidmap) {
+		struct list_head *pos;
+		list_for_each(pos, &adapter->pending_list) {
+			scb = list_entry(pos, scb_t, list);
+			if (scb->pthru->logdrv < 0x80 )
+				scb->pthru->logdrv += 0x80;
+		}
+	}
+
+	atomic_set(&adapter->quiescent, 0);
+
+	mega_runpendq(adapter);
+
+	spin_unlock_irqrestore(&adapter->lock, flags);
+
+	return rval;
+}
+
+
+static int
+mega_do_del_logdrv(adapter_t *adapter, int logdrv)
+{
+	megacmd_t	mc;
+	int	rval;
+
+	memset( &mc, 0, sizeof(megacmd_t));
+
+	mc.cmd = FC_DEL_LOGDRV;
+	mc.opcode = OP_DEL_LOGDRV;
+	mc.subopcode = logdrv;
+
+	rval = mega_internal_command(adapter, &mc, NULL);
+
+	/* log this event */
+	if(rval) {
+		printk(KERN_WARNING "megaraid: Delete LD-%d failed.", logdrv);
+		return rval;
+	}
+
+	/*
+	 * After deleting first logical drive, the logical drives must be
+	 * addressed by adding 0x80 to the logical drive id.
+	 */
+	adapter->read_ldidmap = 1;
+
+	return rval;
+}
+
+
+/**
+ * mega_get_max_sgl()
+ * @adapter - pointer to our soft state
+ *
+ * Find out the maximum number of scatter-gather elements supported by this
+ * version of the firmware
+ */
+static void
+mega_get_max_sgl(adapter_t *adapter)
+{
+	unsigned char	raw_mbox[sizeof(struct mbox_out)];
+	mbox_t	*mbox;
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset(mbox, 0, sizeof(raw_mbox));
+
+	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+	raw_mbox[0] = MAIN_MISC_OPCODE;
+	raw_mbox[2] = GET_MAX_SG_SUPPORT;
+
+
+	if( issue_scb_block(adapter, raw_mbox) ) {
+		/*
+		 * f/w does not support this command. Choose the default value
+		 */
+		adapter->sglen = MIN_SGLIST;
+	}
+	else {
+		adapter->sglen = *((char *)adapter->mega_buffer);
+		
+		/*
+		 * Make sure this is not more than the resources we are
+		 * planning to allocate
+		 */
+		if ( adapter->sglen > MAX_SGLIST )
+			adapter->sglen = MAX_SGLIST;
+	}
+
+	return;
+}
+
+
+/**
+ * mega_support_cluster()
+ * @adapter - pointer to our soft state
+ *
+ * Find out if this firmware support cluster calls.
+ */
+static int
+mega_support_cluster(adapter_t *adapter)
+{
+	unsigned char	raw_mbox[sizeof(struct mbox_out)];
+	mbox_t	*mbox;
+
+	mbox = (mbox_t *)raw_mbox;
+
+	memset(mbox, 0, sizeof(raw_mbox));
+
+	memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+	mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+	/*
+	 * Try to get the initiator id. This command will succeed iff the
+	 * clustering is available on this HBA.
+	 */
+	raw_mbox[0] = MEGA_GET_TARGET_ID;
+
+	if( issue_scb_block(adapter, raw_mbox) == 0 ) {
+
+		/*
+		 * Cluster support available. Get the initiator target id.
+		 * Tell our id to mid-layer too.
+		 */
+		adapter->this_id = *(u32 *)adapter->mega_buffer;
+		adapter->host->this_id = adapter->this_id;
+
+		return 1;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PROC_FS
+/**
+ * mega_adapinq()
+ * @adapter - pointer to our soft state
+ * @dma_handle - DMA address of the buffer
+ *
+ * Issue internal commands while interrupts are available.
+ * We only issue direct mailbox commands from within the driver. ioctl()
+ * interface using these routines can issue passthru commands.
+ */
+static int
+mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
+{
+	megacmd_t	mc;
+
+	memset(&mc, 0, sizeof(megacmd_t));
+
+	if( adapter->flag & BOARD_40LD ) {
+		mc.cmd = FC_NEW_CONFIG;
+		mc.opcode = NC_SUBOP_ENQUIRY3;
+		mc.subopcode = ENQ3_GET_SOLICITED_FULL;
+	}
+	else {
+		mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
+	}
+
+	mc.xferaddr = (u32)dma_handle;
+
+	if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
+		return -1;
+	}
+
+	return 0;
+}
+
+
+/** mega_internal_dev_inquiry()
+ * @adapter - pointer to our soft state
+ * @ch - channel for this device
+ * @tgt - ID of this device
+ * @buf_dma_handle - DMA address of the buffer
+ *
+ * Issue the scsi inquiry for the specified device.
+ */
+static int
+mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
+		dma_addr_t buf_dma_handle)
+{
+	mega_passthru	*pthru;
+	dma_addr_t	pthru_dma_handle;
+	megacmd_t	mc;
+	int		rval;
+	struct pci_dev	*pdev;
+
+
+	/*
+	 * For all internal commands, the buffer must be allocated in <4GB
+	 * address range
+	 */
+	if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
+
+	pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
+			&pthru_dma_handle);
+
+	if( pthru == NULL ) {
+		free_local_pdev(pdev);
+		return -1;
+	}
+
+	pthru->timeout = 2;
+	pthru->ars = 1;
+	pthru->reqsenselen = 14;
+	pthru->islogical = 0;
+
+	pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
+
+	pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
+
+	pthru->cdblen = 6;
+
+	pthru->cdb[0] = INQUIRY;
+	pthru->cdb[1] = 0;
+	pthru->cdb[2] = 0;
+	pthru->cdb[3] = 0;
+	pthru->cdb[4] = 255;
+	pthru->cdb[5] = 0;
+
+
+	pthru->dataxferaddr = (u32)buf_dma_handle;
+	pthru->dataxferlen = 256;
+
+	memset(&mc, 0, sizeof(megacmd_t));
+
+	mc.cmd = MEGA_MBOXCMD_PASSTHRU;
+	mc.xferaddr = (u32)pthru_dma_handle;
+
+	rval = mega_internal_command(adapter, &mc, pthru);
+
+	pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
+			pthru_dma_handle);
+
+	free_local_pdev(pdev);
+
+	return rval;
+}
+#endif
+
+/**
+ * mega_internal_command()
+ * @adapter - pointer to our soft state
+ * @mc - the mailbox command
+ * @pthru - Passthru structure for DCDB commands
+ *
+ * Issue the internal commands in interrupt mode.
+ * The last argument is the address of the passthru structure if the command
+ * to be fired is a passthru command
+ *
+ * Note: parameter 'pthru' is null for non-passthru commands.
+ */
+static int
+mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
+{
+	unsigned long flags;
+	scb_t	*scb;
+	int	rval;
+
+	/*
+	 * The internal commands share one command id and hence are
+	 * serialized. This is so because we want to reserve maximum number of
+	 * available command ids for the I/O commands.
+	 */
+	mutex_lock(&adapter->int_mtx);
+
+	scb = &adapter->int_scb;
+	memset(scb, 0, sizeof(scb_t));
+
+	scb->idx = CMDID_INT_CMDS;
+	scb->state |= SCB_ACTIVE | SCB_PENDQ;
+
+	memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
+
+	/*
+	 * Is it a passthru command
+	 */
+	if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
+		scb->pthru = pthru;
+
+	spin_lock_irqsave(&adapter->lock, flags);
+	list_add_tail(&scb->list, &adapter->pending_list);
+	/*
+	 * Check if the HBA is in quiescent state, e.g., during a
+	 * delete logical drive opertion. If it is, don't run
+	 * the pending_list.
+	 */
+	if (atomic_read(&adapter->quiescent) == 0)
+		mega_runpendq(adapter);
+	spin_unlock_irqrestore(&adapter->lock, flags);
+
+	wait_for_completion(&adapter->int_waitq);
+
+	mc->status = rval = adapter->int_status;
+
+	/*
+	 * Print a debug message for all failed commands. Applications can use
+	 * this information.
+	 */
+	if (rval && trace_level) {
+		printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
+			mc->cmd, mc->opcode, mc->subopcode, rval);
+	}
+
+	mutex_unlock(&adapter->int_mtx);
+	return rval;
+}
+
+static struct scsi_host_template megaraid_template = {
+	.module				= THIS_MODULE,
+	.name				= "MegaRAID",
+	.proc_name			= "megaraid_legacy",
+	.info				= megaraid_info,
+	.queuecommand			= megaraid_queue,	
+	.bios_param			= megaraid_biosparam,
+	.max_sectors			= MAX_SECTORS_PER_IO,
+	.can_queue			= MAX_COMMANDS,
+	.this_id			= DEFAULT_INITIATOR_ID,
+	.sg_tablesize			= MAX_SGLIST,
+	.cmd_per_lun			= DEF_CMD_PER_LUN,
+	.use_clustering			= ENABLE_CLUSTERING,
+	.eh_abort_handler		= megaraid_abort,
+	.eh_device_reset_handler	= megaraid_reset,
+	.eh_bus_reset_handler		= megaraid_reset,
+	.eh_host_reset_handler		= megaraid_reset,
+	.no_write_same			= 1,
+};
+
+static int
+megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct Scsi_Host *host;
+	adapter_t *adapter;
+	unsigned long mega_baseport, tbase, flag = 0;
+	u16 subsysid, subsysvid;
+	u8 pci_bus, pci_dev_func;
+	int irq, i, j;
+	int error = -ENODEV;
+
+	if (pci_enable_device(pdev))
+		goto out;
+	pci_set_master(pdev);
+
+	pci_bus = pdev->bus->number;
+	pci_dev_func = pdev->devfn;
+
+	/*
+	 * The megaraid3 stuff reports the ID of the Intel part which is not
+	 * remotely specific to the megaraid
+	 */
+	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
+		u16 magic;
+		/*
+		 * Don't fall over the Compaq management cards using the same
+		 * PCI identifier
+		 */
+		if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
+		    pdev->subsystem_device == 0xC000)
+		   	return -ENODEV;
+		/* Now check the magic signature byte */
+		pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
+		if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
+			return -ENODEV;
+		/* Ok it is probably a megaraid */
+	}
+
+	/*
+	 * For these vendor and device ids, signature offsets are not
+	 * valid and 64 bit is implicit
+	 */
+	if (id->driver_data & BOARD_64BIT)
+		flag |= BOARD_64BIT;
+	else {
+		u32 magic64;
+
+		pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
+		if (magic64 == HBA_SIGNATURE_64BIT)
+			flag |= BOARD_64BIT;
+	}
+
+	subsysvid = pdev->subsystem_vendor;
+	subsysid = pdev->subsystem_device;
+
+	printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
+		id->vendor, id->device, pci_bus);
+
+	printk("slot %d:func %d\n",
+		PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));
+
+	/* Read the base port and IRQ from PCI */
+	mega_baseport = pci_resource_start(pdev, 0);
+	irq = pdev->irq;
+
+	tbase = mega_baseport;
+	if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
+		flag |= BOARD_MEMMAP;
+
+		if (!request_mem_region(mega_baseport, 128, "megaraid")) {
+			printk(KERN_WARNING "megaraid: mem region busy!\n");
+			goto out_disable_device;
+		}
+
+		mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
+		if (!mega_baseport) {
+			printk(KERN_WARNING
+			       "megaraid: could not map hba memory\n");
+			goto out_release_region;
+		}
+	} else {
+		flag |= BOARD_IOMAP;
+		mega_baseport += 0x10;
+
+		if (!request_region(mega_baseport, 16, "megaraid"))
+			goto out_disable_device;
+	}
+
+	/* Initialize SCSI Host structure */
+	host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
+	if (!host)
+		goto out_iounmap;
+
+	adapter = (adapter_t *)host->hostdata;
+	memset(adapter, 0, sizeof(adapter_t));
+
+	printk(KERN_NOTICE
+		"scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
+		host->host_no, mega_baseport, irq);
+
+	adapter->base = mega_baseport;
+	if (flag & BOARD_MEMMAP)
+		adapter->mmio_base = (void __iomem *) mega_baseport;
+
+	INIT_LIST_HEAD(&adapter->free_list);
+	INIT_LIST_HEAD(&adapter->pending_list);
+	INIT_LIST_HEAD(&adapter->completed_list);
+
+	adapter->flag = flag;
+	spin_lock_init(&adapter->lock);
+
+	host->cmd_per_lun = max_cmd_per_lun;
+	host->max_sectors = max_sectors_per_io;
+
+	adapter->dev = pdev;
+	adapter->host = host;
+
+	adapter->host->irq = irq;
+
+	if (flag & BOARD_MEMMAP)
+		adapter->host->base = tbase;
+	else {
+		adapter->host->io_port = tbase;
+		adapter->host->n_io_port = 16;
+	}
+
+	adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
+
+	/*
+	 * Allocate buffer to issue internal commands.
+	 */
+	adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
+		MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
+	if (!adapter->mega_buffer) {
+		printk(KERN_WARNING "megaraid: out of RAM.\n");
+		goto out_host_put;
+	}
+
+	adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
+	if (!adapter->scb_list) {
+		printk(KERN_WARNING "megaraid: out of RAM.\n");
+		goto out_free_cmd_buffer;
+	}
+
+	if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
+				megaraid_isr_memmapped : megaraid_isr_iomapped,
+					IRQF_SHARED, "megaraid", adapter)) {
+		printk(KERN_WARNING
+			"megaraid: Couldn't register IRQ %d!\n", irq);
+		goto out_free_scb_list;
+	}
+
+	if (mega_setup_mailbox(adapter))
+		goto out_free_irq;
+
+	if (mega_query_adapter(adapter))
+		goto out_free_mbox;
+
+	/*
+	 * Have checks for some buggy f/w
+	 */
+	if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
+		/*
+		 * Which firmware
+		 */
+		if (!strcmp(adapter->fw_version, "3.00") ||
+				!strcmp(adapter->fw_version, "3.01")) {
+
+			printk( KERN_WARNING
+				"megaraid: Your  card is a Dell PERC "
+				"2/SC RAID controller with  "
+				"firmware\nmegaraid: 3.00 or 3.01.  "
+				"This driver is known to have "
+				"corruption issues\nmegaraid: with "
+				"those firmware versions on this "
+				"specific card.  In order\nmegaraid: "
+				"to protect your data, please upgrade "
+				"your firmware to version\nmegaraid: "
+				"3.10 or later, available from the "
+				"Dell Technical Support web\n"
+				"megaraid: site at\nhttp://support."
+				"dell.com/us/en/filelib/download/"
+				"index.asp?fileid=2940\n"
+			);
+		}
+	}
+
+	/*
+	 * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
+	 * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
+	 * support, since this firmware cannot handle 64 bit
+	 * addressing
+	 */
+	if ((subsysvid == PCI_VENDOR_ID_HP) &&
+	    ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
+		/*
+		 * which firmware
+		 */
+		if (!strcmp(adapter->fw_version, "H01.07") ||
+		    !strcmp(adapter->fw_version, "H01.08") ||
+		    !strcmp(adapter->fw_version, "H01.09") ) {
+			printk(KERN_WARNING
+				"megaraid: Firmware H.01.07, "
+				"H.01.08, and H.01.09 on 1M/2M "
+				"controllers\n"
+				"megaraid: do not support 64 bit "
+				"addressing.\nmegaraid: DISABLING "
+				"64 bit support.\n");
+			adapter->flag &= ~BOARD_64BIT;
+		}
+	}
+
+	if (mega_is_bios_enabled(adapter))
+		mega_hbas[hba_count].is_bios_enabled = 1;
+	mega_hbas[hba_count].hostdata_addr = adapter;
+
+	/*
+	 * Find out which channel is raid and which is scsi. This is
+	 * for ROMB support.
+	 */
+	mega_enum_raid_scsi(adapter);
+
+	/*
+	 * Find out if a logical drive is set as the boot drive. If
+	 * there is one, will make that as the first logical drive.
+	 * ROMB: Do we have to boot from a physical drive. Then all
+	 * the physical drives would appear before the logical disks.
+	 * Else, all the physical drives would be exported to the mid
+	 * layer after logical drives.
+	 */
+	mega_get_boot_drv(adapter);
+
+	if (adapter->boot_pdrv_enabled) {
+		j = adapter->product_info.nchannels;
+		for( i = 0; i < j; i++ )
+			adapter->logdrv_chan[i] = 0;
+		for( i = j; i < NVIRT_CHAN + j; i++ )
+			adapter->logdrv_chan[i] = 1;
+	} else {
+		for (i = 0; i < NVIRT_CHAN; i++)
+			adapter->logdrv_chan[i] = 1;
+		for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
+			adapter->logdrv_chan[i] = 0;
+		adapter->mega_ch_class <<= NVIRT_CHAN;
+	}
+
+	/*
+	 * Do we support random deletion and addition of logical
+	 * drives
+	 */
+	adapter->read_ldidmap = 0;	/* set it after first logdrv
+						   delete cmd */
+	adapter->support_random_del = mega_support_random_del(adapter);
+
+	/* Initialize SCBs */
+	if (mega_init_scb(adapter))
+		goto out_free_mbox;
+
+	/*
+	 * Reset the pending commands counter
+	 */
+	atomic_set(&adapter->pend_cmds, 0);
+
+	/*
+	 * Reset the adapter quiescent flag
+	 */
+	atomic_set(&adapter->quiescent, 0);
+
+	hba_soft_state[hba_count] = adapter;
+
+	/*
+	 * Fill in the structure which needs to be passed back to the
+	 * application when it does an ioctl() for controller related
+	 * information.
+	 */
+	i = hba_count;
+
+	mcontroller[i].base = mega_baseport;
+	mcontroller[i].irq = irq;
+	mcontroller[i].numldrv = adapter->numldrv;
+	mcontroller[i].pcibus = pci_bus;
+	mcontroller[i].pcidev = id->device;
+	mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
+	mcontroller[i].pciid = -1;
+	mcontroller[i].pcivendor = id->vendor;
+	mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
+	mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
+
+
+	/* Set the Mode of addressing to 64 bit if we can */
+	if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
+		pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+		adapter->has_64bit_addr = 1;
+	} else  {
+		pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+		adapter->has_64bit_addr = 0;
+	}
+		
+	mutex_init(&adapter->int_mtx);
+	init_completion(&adapter->int_waitq);
+
+	adapter->this_id = DEFAULT_INITIATOR_ID;
+	adapter->host->this_id = DEFAULT_INITIATOR_ID;
+
+#if MEGA_HAVE_CLUSTERING
+	/*
+	 * Is cluster support enabled on this controller
+	 * Note: In a cluster the HBAs ( the initiators ) will have
+	 * different target IDs and we cannot assume it to be 7. Call
+	 * to mega_support_cluster() will get the target ids also if
+	 * the cluster support is available
+	 */
+	adapter->has_cluster = mega_support_cluster(adapter);
+	if (adapter->has_cluster) {
+		printk(KERN_NOTICE
+			"megaraid: Cluster driver, initiator id:%d\n",
+			adapter->this_id);
+	}
+#endif
+
+	pci_set_drvdata(pdev, host);
+
+	mega_create_proc_entry(hba_count, mega_proc_dir_entry);
+
+	error = scsi_add_host(host, &pdev->dev);
+	if (error)
+		goto out_free_mbox;
+
+	scsi_scan_host(host);
+	hba_count++;
+	return 0;
+
+ out_free_mbox:
+	pci_free_consistent(adapter->dev, sizeof(mbox64_t),
+			adapter->una_mbox64, adapter->una_mbox64_dma);
+ out_free_irq:
+	free_irq(adapter->host->irq, adapter);
+ out_free_scb_list:
+	kfree(adapter->scb_list);
+ out_free_cmd_buffer:
+	pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
+			adapter->mega_buffer, adapter->buf_dma_handle);
+ out_host_put:
+	scsi_host_put(host);
+ out_iounmap:
+	if (flag & BOARD_MEMMAP)
+		iounmap((void *)mega_baseport);
+ out_release_region:
+	if (flag & BOARD_MEMMAP)
+		release_mem_region(tbase, 128);
+	else
+		release_region(mega_baseport, 16);
+ out_disable_device:
+	pci_disable_device(pdev);
+ out:
+	return error;
+}
+
+static void
+__megaraid_shutdown(adapter_t *adapter)
+{
+	u_char	raw_mbox[sizeof(struct mbox_out)];
+	mbox_t	*mbox = (mbox_t *)raw_mbox;
+	int	i;
+
+	/* Flush adapter cache */
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+	raw_mbox[0] = FLUSH_ADAPTER;
+
+	free_irq(adapter->host->irq, adapter);
+
+	/* Issue a blocking (interrupts disabled) command to the card */
+	issue_scb_block(adapter, raw_mbox);
+
+	/* Flush disks cache */
+	memset(&mbox->m_out, 0, sizeof(raw_mbox));
+	raw_mbox[0] = FLUSH_SYSTEM;
+
+	/* Issue a blocking (interrupts disabled) command to the card */
+	issue_scb_block(adapter, raw_mbox);
+	
+	if (atomic_read(&adapter->pend_cmds) > 0)
+		printk(KERN_WARNING "megaraid: pending commands!!\n");
+
+	/*
+	 * Have a delibrate delay to make sure all the caches are
+	 * actually flushed.
+	 */
+	for (i = 0; i <= 10; i++)
+		mdelay(1000);
+}
+
+static void
+megaraid_remove_one(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	adapter_t *adapter = (adapter_t *)host->hostdata;
+
+	scsi_remove_host(host);
+
+	__megaraid_shutdown(adapter);
+
+	/* Free our resources */
+	if (adapter->flag & BOARD_MEMMAP) {
+		iounmap((void *)adapter->base);
+		release_mem_region(adapter->host->base, 128);
+	} else
+		release_region(adapter->base, 16);
+
+	mega_free_sgl(adapter);
+
+#ifdef CONFIG_PROC_FS
+	if (adapter->controller_proc_dir_entry) {
+		remove_proc_entry("stat", adapter->controller_proc_dir_entry);
+		remove_proc_entry("config",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("mailbox",
+				adapter->controller_proc_dir_entry);
+#if MEGA_HAVE_ENH_PROC
+		remove_proc_entry("rebuild-rate",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("battery-status",
+				adapter->controller_proc_dir_entry);
+
+		remove_proc_entry("diskdrives-ch0",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("diskdrives-ch1",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("diskdrives-ch2",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("diskdrives-ch3",
+				adapter->controller_proc_dir_entry);
+
+		remove_proc_entry("raiddrives-0-9",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("raiddrives-10-19",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("raiddrives-20-29",
+				adapter->controller_proc_dir_entry);
+		remove_proc_entry("raiddrives-30-39",
+				adapter->controller_proc_dir_entry);
+#endif
+		{
+			char	buf[12] = { 0 };
+			sprintf(buf, "hba%d", adapter->host->host_no);
+			remove_proc_entry(buf, mega_proc_dir_entry);
+		}
+	}
+#endif
+
+	pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
+			adapter->mega_buffer, adapter->buf_dma_handle);
+	kfree(adapter->scb_list);
+	pci_free_consistent(adapter->dev, sizeof(mbox64_t),
+			adapter->una_mbox64, adapter->una_mbox64_dma);
+
+	scsi_host_put(host);
+	pci_disable_device(pdev);
+
+	hba_count--;
+}
+
+static void
+megaraid_shutdown(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	adapter_t *adapter = (adapter_t *)host->hostdata;
+
+	__megaraid_shutdown(adapter);
+}
+
+static struct pci_device_id megaraid_pci_tbl[] = {
+	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{0,}
+};
+MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
+
+static struct pci_driver megaraid_pci_driver = {
+	.name		= "megaraid_legacy",
+	.id_table	= megaraid_pci_tbl,
+	.probe		= megaraid_probe_one,
+	.remove		= megaraid_remove_one,
+	.shutdown	= megaraid_shutdown,
+};
+
+static int __init megaraid_init(void)
+{
+	int error;
+
+	if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
+		max_cmd_per_lun = MAX_CMD_PER_LUN;
+	if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
+		max_mbox_busy_wait = MBOX_BUSY_WAIT;
+
+#ifdef CONFIG_PROC_FS
+	mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
+	if (!mega_proc_dir_entry) {
+		printk(KERN_WARNING
+				"megaraid: failed to create megaraid root\n");
+	}
+#endif
+	error = pci_register_driver(&megaraid_pci_driver);
+	if (error) {
+#ifdef CONFIG_PROC_FS
+		remove_proc_entry("megaraid", NULL);
+#endif
+		return error;
+	}
+
+	/*
+	 * Register the driver as a character device, for applications
+	 * to access it for ioctls.
+	 * First argument (major) to register_chrdev implies a dynamic
+	 * major number allocation.
+	 */
+	major = register_chrdev(0, "megadev_legacy", &megadev_fops);
+	if (!major) {
+		printk(KERN_WARNING
+				"megaraid: failed to register char device\n");
+	}
+
+	return 0;
+}
+
+static void __exit megaraid_exit(void)
+{
+	/*
+	 * Unregister the character device interface to the driver.
+	 */
+	unregister_chrdev(major, "megadev_legacy");
+
+	pci_unregister_driver(&megaraid_pci_driver);
+
+#ifdef CONFIG_PROC_FS
+	remove_proc_entry("megaraid", NULL);
+#endif
+}
+
+module_init(megaraid_init);
+module_exit(megaraid_exit);
+
+/* vi: set ts=8 sw=8 tw=78: */