litmus-rt.git - The LITMUS^RT kernel.

The LITMUS^RT kernel.

Bjoern Brandenburg

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author	Namhoon Kim <namhoonk@cs.unc.edu>	2015-11-09 14:27:20 -0500
committer	Namhoon Kim <namhoonk@cs.unc.edu>	2015-11-09 14:38:50 -0500
commit	632844f134629f9954c69432f55291d8d3a06cec (patch)
tree	1eaedc9076d0bcbb39dc6c1aba192da929d660c1 /arch/arm/include
parent	d126eb2a5053f139e5bc1b37344edd88d32bd033 (diff)

Fix __NR_syscalls for ARM

__NR_syscalls must be a multiple of 4 for ARM. This patch adds padding to __NR_syscalls and fixes the missing NR_litmus_syscalls in include/litmus/unistd_32.h.

Diffstat (limited to 'arch/arm/include')

-rw-r--r--

arch/arm/include/asm/unistd.h

1 files changed, 2 insertions, 1 deletions


diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h index 0c462a9e5205..7197bbe4dda1 100644 --- a/arch/arm/include/asm/unistd.h +++ b/arch/arm/include/asm/unistd.h
@@ -19,7 +19,8 @@
19	* This may need to be greater than __NR_last_syscall+1 in order to	19	* This may need to be greater than __NR_last_syscall+1 in order to
20	* account for the padding in the syscall table	20	* account for the padding in the syscall table
21	*/	21	*/
22	#define __NR_syscalls (388 + NR_litmus_syscalls)	22	#define __NR_syscalls (388 + NR_litmus_syscalls + 3)
		23
23		24
24	/*	25	/*
25	* NOTE: This is a ghost syscall private to the kernel. Only the	26	* NOTE: This is a ghost syscall private to the kernel. Only the

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/*
 *
 *			Linux MegaRAID device driver
 *
 * Copyright � 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 : v2.00.3 (Feb 19, 2003) - Atul Mukker <Atul.Mukker@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/delay.h>
#include <linux/proc_fs.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 <scsi/scsicam.h>

#include "scsi.h"
#include <scsi/scsi_host.h>

#include "megaraid.h"

#define MEGARAID_MODULE_VERSION "2.00.3"

MODULE_AUTHOR ("LSI Logic Corporation");
MODULE_DESCRIPTION ("LSI Logic MegaRAID driver");
MODULE_LICENSE ("GPL");
MODULE_VERSION(MEGARAID_MODULE_VERSION);

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)->base + 0x20)
#define RDOUTDOOR(adapter)		readl((adapter)->base + 0x2C)
#define WRINDOOR(adapter,value)		writel(value, (adapter)->base + 0x20)
#define WROUTDOOR(adapter,value)	writel(value, (adapter)->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];

/*
 * The File Operations structure for the serial/ioctl interface of the driver
 */
static struct file_operations megadev_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= megadev_ioctl,
	.open		= megadev_open,
};

/*
 * 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_p(adapter->mbox_dma & 0xFF,
				adapter->host->io_port + MBOX_PORT0);

		outb_p((adapter->mbox_dma >> 8) & 0xFF,
				adapter->host->io_port + MBOX_PORT1);

		outb_p((adapter->mbox_dma >> 16) & 0xFF,
				adapter->host->io_port + MBOX_PORT2);

		outb_p((adapter->mbox_dma >> 24) & 0xFF,
				adapter->host->io_port + MBOX_PORT3);

		outb_p(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;	/* Upto 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 */
	if (adapter->product_info.subsysvid == HP_SUBSYS_VID) {
		sprintf (adapter->fw_version, "%c%d%d.%d%d",
			 adapter->product_info.fw_version[2],
			 adapter->product_info.fw_version[1] >> 8,
			 adapter->product_info.fw_version[1] & 0x0f,
			 adapter->product_info.fw_version[0] >> 8,
			 adapter->product_info.fw_version[0] & 0x0f);
		sprintf (adapter->bios_version, "%c%d%d.%d%d",
			 adapter->product_info.bios_version[2],
			 adapter->product_info.bios_version[1] >> 8,
			 adapter->product_info.bios_version[1] & 0x0f,
			 adapter->product_info.bios_version[0] >> 8,
			 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(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
{
	adapter_t	*adapter;
	scb_t	*scb;
	int	busy=0;

	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.
	 */

	scb = mega_build_cmd(adapter, scmd, &busy);

	if(scb) {
		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);
		}
		return 0;
	}

	return busy;
}

/**
 * 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;
	long	seg;
	char	islogical;
	int	max_ldrv_num;
	int	channel = 0;
	int	target = 0;
	int	ldrv_num = 0;   /* logical drive number */


	/*
	 * filter the internal and ioctl commands
	 */
	if((cmd->cmnd[0] == MEGA_INTERNAL_CMD)) {
		return cmd->buffer;
	}


	/*
	 * 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:
			memset(cmd->request_buffer, 0, cmd->request_bufflen);

#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:
			memset(cmd->request_buffer, 0, cmd->cmnd[4]);
			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, (u32 *)&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
 * @regs - unused
 *
 * 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, struct pt_regs *regs)
{
	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
 * @regs - unused
 *
 * 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, struct pt_regs *regs)
{
	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 comamnds 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];

		if( cmdid == CMDID_INT_CMDS ) { /* internal command */
			scb = &adapter->int_scb;
			cmd = scb->cmd;
			mbox = (mbox_t *)scb->raw_mbox;

			/*
			 * Internal command interface do not fire the extended
			 * passthru or 64-bit passthru
			 */
			pthru = scb->pthru;

		}
		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 %lx[%x] complete.\n",
					scb->cmd->serial_number, 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 %lx[%x] complete.\n",
					scb->cmd->serial_number, 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 ) {

			if( cmd->use_sg ) {
				sgl = (struct scatterlist *)
					cmd->request_buffer;

				if( sgl->page ) {
					c = *(unsigned char *)
					page_address((&sgl[0])->page) +
					(&sgl[0])->offset; 
				}
				else {
					printk(KERN_WARNING
						"megaraid: invalid sg.\n");
					c = 0;
				}
			}
			else {
				c = *(u8 *)cmd->request_buffer;
			}

			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;
		}

		/*
		 * 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 ) { /* internal command */
			cmd->result = status;

			/*
			 * Remove the internal command from the pending list
			 */
			list_del_init(&scb->list);
			scb->state = SCB_FREE;
		}
		else {
			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) {

		Scsi_Pointer* spos = (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_BULK_DATA:
		pci_unmap_page(adapter->dev, scb->dma_h_bulkdata,
			scb->cmd->request_bufflen, scb->dma_direction);
		break;

	case MEGA_SGLIST:
		pci_unmap_sg(adapter->dev, scb->cmd->request_buffer,
			scb->cmd->use_sg, scb->dma_direction);
		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); yield();
	}
	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	*sgl;
	struct page	*page;
	unsigned long	offset;
	Scsi_Cmnd	*cmd;
	int	sgcnt;
	int	idx;

	cmd = scb->cmd;

	/* Scatter-gather not used */
	if( !cmd->use_sg ) {

		page = virt_to_page(cmd->request_buffer);
		offset = offset_in_page(cmd->request_buffer);

		scb->dma_h_bulkdata = pci_map_page(adapter->dev,
						  page, offset,
						  cmd->request_bufflen,
						  scb->dma_direction);
		scb->dma_type = MEGA_BULK_DATA;

		/*
		 * We need to handle special 64-bit commands that need a
		 * minimum of 1 SG
		 */
		if( adapter->has_64bit_addr ) {
			scb->sgl64[0].address = scb->dma_h_bulkdata;
			scb->sgl64[0].length = cmd->request_bufflen;
			*buf = (u32)scb->sgl_dma_addr;
			*len = (u32)cmd->request_bufflen;
			return 1;
		}
		else {
			*buf = (u32)scb->dma_h_bulkdata;
			*len = (u32)cmd->request_bufflen;
		}
		return 0;
	}

	sgl = (struct scatterlist *)cmd->request_buffer;

	/*
	 * Copy Scatter-Gather list info into controller structure.
	 *
	 * The number of sg elements returned must not exceed our limit
	 */
	sgcnt = pci_map_sg(adapter->dev, sgl, cmd->use_sg,
			scb->dma_direction);

	scb->dma_type = MEGA_SGLIST;

	if( sgcnt > adapter->sglen ) BUG();

	for( idx = 0; idx < sgcnt; idx++, sgl++ ) {

		if( adapter->has_64bit_addr ) {
			scb->sgl64[idx].address = sg_dma_address(sgl);
			scb->sgl64[idx].length = sg_dma_len(sgl);
		}
		else {
			scb->sgl[idx].address = sg_dma_address(sgl);
			scb->sgl[idx].length = sg_dma_len(sgl);
		}
	}

	/* Reset pointer and length fields */
	*buf = scb->sgl_dma_addr;

	/*
	 * For passthru command, dataxferlen must be set, even for commands
	 * with a sg list
	 */
	*len = (u32)cmd->request_bufflen;

	/* 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,
		 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(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;

	spin_unlock_irq(&adapter->lock);
	if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) != 0 ) {
		printk(KERN_WARNING
				"megaraid: reservation reset failed.\n");
	}
	else {
		printk(KERN_INFO "megaraid: reservation reset.\n");
	}
	spin_lock_irq(&adapter->lock);
#endif

	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);

	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-%lx cmd=%x <c=%d t=%d l=%d>\n",
	     (aor == SCB_ABORT)? "ABORTING":"RESET", cmd->serial_number,
	     cmd->cmnd[0], cmd->device->channel, 
	     cmd->device->id, cmd->device->lun);

	if(list_empty(&adapter->pending_list))
		return FALSE;

	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 firmare owenership. 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-%lx[%x], fw owner.\n",
					(aor==SCB_ABORT) ? "ABORTING":"RESET",
					cmd->serial_number, scb->idx);

				return FALSE;
			}
			else {

				/*
				 * Not yet issued! Remove from the pending
				 * list
				 */
				printk(KERN_WARNING
					"megaraid: %s-%lx[%x], driver owner.\n",
					(aor==SCB_ABORT) ? "ABORTING":"RESET",
					cmd->serial_number, 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 TRUE;
			}
		}
	}

	return FALSE;
}

static inline int
make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
{
	*pdev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);

	if( *pdev == NULL ) return -1;

	memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));

	if( pci_set_dma_mask(*pdev, 0xffffffff) != 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  */

#define CREATE_READ_PROC(string, func)	create_proc_read_entry(string,	\
					S_IRUSR | S_IFREG,		\
					controller_proc_dir_entry,	\
					func, adapter)

/**
 * 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)
{
	struct proc_dir_entry	*controller_proc_dir_entry = NULL;
	u8		string[64] = { 0 };
	adapter_t	*adapter = hba_soft_state[index];

	sprintf(string, "hba%d", adapter->host->host_no);

	controller_proc_dir_entry =
		adapter->controller_proc_dir_entry = proc_mkdir(string, parent);

	if(!controller_proc_dir_entry) {
		printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
		return;
	}
	adapter->proc_read = CREATE_READ_PROC("config", proc_read_config);
	adapter->proc_stat = CREATE_READ_PROC("stat", proc_read_stat);
	adapter->proc_mbox = CREATE_READ_PROC("mailbox", proc_read_mbox);
#if MEGA_HAVE_ENH_PROC
	adapter->proc_rr = CREATE_READ_PROC("rebuild-rate", proc_rebuild_rate);
	adapter->proc_battery = CREATE_READ_PROC("battery-status",
			proc_battery);

	/*
	 * Display each physical drive on its channel
	 */
	adapter->proc_pdrvstat[0] = CREATE_READ_PROC("diskdrives-ch0",
					proc_pdrv_ch0);
	adapter->proc_pdrvstat[1] = CREATE_READ_PROC("diskdrives-ch1",
					proc_pdrv_ch1);
	adapter->proc_pdrvstat[2] = CREATE_READ_PROC("diskdrives-ch2",
					proc_pdrv_ch2);
	adapter->proc_pdrvstat[3] = CREATE_READ_PROC("diskdrives-ch3",
					proc_pdrv_ch3);

	/*
	 * Display a set of up to 10 logical drive through each of following
	 * /proc entries
	 */
	adapter->proc_rdrvstat[0] = CREATE_READ_PROC("raiddrives-0-9",
					proc_rdrv_10);
	adapter->proc_rdrvstat[1] = CREATE_READ_PROC("raiddrives-10-19",
					proc_rdrv_20);
	adapter->proc_rdrvstat[2] = CREATE_READ_PROC("raiddrives-20-29",
					proc_rdrv_30);
	adapter->proc_rdrvstat[3] = CREATE_READ_PROC("raiddrives-30-39",
					proc_rdrv_40);
#endif
}


/**
 * proc_read_config()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display configuration information about the controller.
 */
static int
proc_read_config(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{

	adapter_t *adapter = (adapter_t *)data;
	int len = 0;

	len += sprintf(page+len, "%s", MEGARAID_VERSION);

	if(adapter->product_info.product_name[0])
		len += sprintf(page+len, "%s\n",
				adapter->product_info.product_name);

	len += sprintf(page+len, "Controller Type: ");

	if( adapter->flag & BOARD_MEMMAP ) {
		len += sprintf(page+len,
			"438/466/467/471/493/518/520/531/532\n");
	}
	else {
		len += sprintf(page+len,
			"418/428/434\n");
	}

	if(adapter->flag & BOARD_40LD) {
		len += sprintf(page+len,
				"Controller Supports 40 Logical Drives\n");
	}

	if(adapter->flag & BOARD_64BIT) {
		len += sprintf(page+len,
		"Controller capable of 64-bit memory addressing\n");
	}
	if( adapter->has_64bit_addr ) {
		len += sprintf(page+len,
			"Controller using 64-bit memory addressing\n");
	}
	else {
		len += sprintf(page+len,
			"Controller is not using 64-bit memory addressing\n");
	}

	len += sprintf(page+len, "Base = %08lx, Irq = %d, ", adapter->base,
			adapter->host->irq);

	len += sprintf(page+len, "Logical Drives = %d, Channels = %d\n",
			adapter->numldrv, adapter->product_info.nchannels);

	len += sprintf(page+len, "Version =%s:%s, DRAM = %dMb\n",
			adapter->fw_version, adapter->bios_version,
			adapter->product_info.dram_size);

	len += sprintf(page+len,
		"Controller Queue Depth = %d, Driver Queue Depth = %d\n",
		adapter->product_info.max_commands, adapter->max_cmds);

	len += sprintf(page+len, "support_ext_cdb    = %d\n",
			adapter->support_ext_cdb);
	len += sprintf(page+len, "support_random_del = %d\n",
			adapter->support_random_del);
	len += sprintf(page+len, "boot_ldrv_enabled  = %d\n",
			adapter->boot_ldrv_enabled);
	len += sprintf(page+len, "boot_ldrv          = %d\n",
			adapter->boot_ldrv);
	len += sprintf(page+len, "boot_pdrv_enabled  = %d\n",
			adapter->boot_pdrv_enabled);
	len += sprintf(page+len, "boot_pdrv_ch       = %d\n",
			adapter->boot_pdrv_ch);
	len += sprintf(page+len, "boot_pdrv_tgt      = %d\n",
			adapter->boot_pdrv_tgt);
	len += sprintf(page+len, "quiescent          = %d\n",
			atomic_read(&adapter->quiescent));
	len += sprintf(page+len, "has_cluster        = %d\n",
			adapter->has_cluster);

	len += sprintf(page+len, "\nModule Parameters:\n");
	len += sprintf(page+len, "max_cmd_per_lun    = %d\n",
			max_cmd_per_lun);
	len += sprintf(page+len, "max_sectors_per_io = %d\n",
			max_sectors_per_io);

	*eof = 1;

	return len;
}



/**
 * proc_read_stat()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Diaplay statistical information about the I/O activity.
 */
static int
proc_read_stat(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t	*adapter;
	int	len;
	int	i;

	i = 0;	/* avoid compilation warnings */
	len = 0;
	adapter = (adapter_t *)data;

	len = sprintf(page, "Statistical Information for this controller\n");
	len += sprintf(page+len, "pend_cmds = %d\n",
			atomic_read(&adapter->pend_cmds));
#if MEGA_HAVE_STATS
	for(i = 0; i < adapter->numldrv; i++) {
		len += sprintf(page+len, "Logical Drive %d:\n", i);

		len += sprintf(page+len,
			"\tReads Issued = %lu, Writes Issued = %lu\n",
			adapter->nreads[i], adapter->nwrites[i]);

		len += sprintf(page+len,
			"\tSectors Read = %lu, Sectors Written = %lu\n",
			adapter->nreadblocks[i], adapter->nwriteblocks[i]);

		len += sprintf(page+len,
			"\tRead errors = %lu, Write errors = %lu\n\n",
			adapter->rd_errors[i], adapter->wr_errors[i]);
	}
#else
	len += sprintf(page+len,
			"IO and error counters not compiled in driver.\n");
#endif

	*eof = 1;

	return len;
}


/**
 * proc_read_mbox()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display mailbox information for the last command issued. This information
 * is good for debugging.
 */
static int
proc_read_mbox(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{

	adapter_t	*adapter = (adapter_t *)data;
	volatile mbox_t	*mbox = adapter->mbox;
	int	len = 0;

	len = sprintf(page, "Contents of Mail Box Structure\n");
	len += sprintf(page+len, "  Fw Command   = 0x%02x\n", 
			mbox->m_out.cmd);
	len += sprintf(page+len, "  Cmd Sequence = 0x%02x\n", 
			mbox->m_out.cmdid);
	len += sprintf(page+len, "  No of Sectors= %04d\n", 
			mbox->m_out.numsectors);
	len += sprintf(page+len, "  LBA          = 0x%02x\n", 
			mbox->m_out.lba);
	len += sprintf(page+len, "  DTA          = 0x%08x\n", 
			mbox->m_out.xferaddr);
	len += sprintf(page+len, "  Logical Drive= 0x%02x\n", 
			mbox->m_out.logdrv);
	len += sprintf(page+len, "  No of SG Elmt= 0x%02x\n",
			mbox->m_out.numsgelements);
	len += sprintf(page+len, "  Busy         = %01x\n", 
			mbox->m_in.busy);
	len += sprintf(page+len, "  Status       = 0x%02x\n", 
			mbox->m_in.status);

	*eof = 1;

	return len;
}


/**
 * proc_rebuild_rate()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display current rebuild rate
 */
static int
proc_rebuild_rate(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t	*adapter = (adapter_t *)data;
	dma_addr_t	dma_handle;
	caddr_t		inquiry;
	struct pci_dev	*pdev;
	int	len = 0;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		*eof = 1;
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		free_local_pdev(pdev);
		*eof = 1;
		return len;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {

		len = sprintf(page, "Adapter inquiry failed.\n");

		printk(KERN_WARNING "megaraid: inquiry failed.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		*eof = 1;

		return len;
	}

	if( adapter->flag & BOARD_40LD ) {
		len = sprintf(page, "Rebuild Rate: [%d%%]\n",
			((mega_inquiry3 *)inquiry)->rebuild_rate);
	}
	else {
		len = sprintf(page, "Rebuild Rate: [%d%%]\n",
			((mraid_ext_inquiry *)
			inquiry)->raid_inq.adapter_info.rebuild_rate);
	}


	mega_free_inquiry(inquiry, dma_handle, pdev);

	free_local_pdev(pdev);

	*eof = 1;

	return len;
}


/**
 * proc_battery()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the battery module on the controller.
 */
static int
proc_battery(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t	*adapter = (adapter_t *)data;
	dma_addr_t	dma_handle;
	caddr_t		inquiry;
	struct pci_dev	*pdev;
	u8	battery_status = 0;
	char	str[256];
	int	len = 0;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		*eof = 1;
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		free_local_pdev(pdev);
		*eof = 1;
		return len;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {

		len = sprintf(page, "Adapter inquiry failed.\n");

		printk(KERN_WARNING "megaraid: inquiry failed.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		*eof = 1;

		return len;
	}

	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
	 */
	sprintf(str, "Battery Status:[%d]", battery_status);

	if(battery_status == MEGA_BATT_CHARGE_DONE)
		strcat(str, " Charge Done");

	if(battery_status & MEGA_BATT_MODULE_MISSING)
		strcat(str, " Module Missing");
	
	if(battery_status & MEGA_BATT_LOW_VOLTAGE)
		strcat(str, " Low Voltage");
	
	if(battery_status & MEGA_BATT_TEMP_HIGH)
		strcat(str, " Temperature High");
	
	if(battery_status & MEGA_BATT_PACK_MISSING)
		strcat(str, " Pack Missing");
	
	if(battery_status & MEGA_BATT_CHARGE_INPROG)
		strcat(str, " Charge In-progress");
	
	if(battery_status & MEGA_BATT_CHARGE_FAIL)
		strcat(str, " Charge Fail");
	
	if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
		strcat(str, " Cycles Exceeded");

	len = sprintf(page, "%s\n", str);


	mega_free_inquiry(inquiry, dma_handle, pdev);

	free_local_pdev(pdev);

	*eof = 1;

	return len;
}


/**
 * proc_pdrv_ch0()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 0.
 */
static int
proc_pdrv_ch0(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 0));
}


/**
 * proc_pdrv_ch1()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 1.
 */
static int
proc_pdrv_ch1(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 1));
}


/**
 * proc_pdrv_ch2()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 2.
 */
static int
proc_pdrv_ch2(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 2));
}


/**
 * proc_pdrv_ch3()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display information about the physical drives on physical channel 3.
 */
static int
proc_pdrv_ch3(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_pdrv(adapter, page, 3));
}


/**
 * proc_pdrv()
 * @page - buffer to write the data in
 * @adapter - pointer to our soft state
 *
 * Display information about the physical drives.
 */
static int
proc_pdrv(adapter_t *adapter, char *page, 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	len = 0;
	char	str[80];
	int	i;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		goto free_pdev;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {
		len = sprintf(page, "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 ) {
		len = sprintf(page, "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:
			sprintf(str,
			"Channel:%2d Id:%2d State: Online",
				channel, tgt);
			break;

		case PDRV_FAILED:
			sprintf(str,
			"Channel:%2d Id:%2d State: Failed",
				channel, tgt);
			break;

		case PDRV_RBLD:
			sprintf(str,
			"Channel:%2d Id:%2d State: Rebuild",
				channel, tgt);
			break;

		case PDRV_HOTSPARE:
			sprintf(str,
			"Channel:%2d Id:%2d State: Hot spare",
				channel, tgt);
			break;

		default:
			sprintf(str,
			"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
		 */
		if( (len + 240) >= PAGE_SIZE ) break;

		len += sprintf(page+len, "%s.\n", str);

		len += mega_print_inquiry(page+len, 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 len;
}


/*
 * Display scsi inquiry
 */
static int
mega_print_inquiry(char *page, char *scsi_inq)
{
	int	len = 0;
	int	i;

	len = sprintf(page, "  Vendor: ");
	for( i = 8; i < 16; i++ ) {
		len += sprintf(page+len, "%c", scsi_inq[i]);
	}

	len += sprintf(page+len, "  Model: ");

	for( i = 16; i < 32; i++ ) {
		len += sprintf(page+len, "%c", scsi_inq[i]);
	}

	len += sprintf(page+len, "  Rev: ");

	for( i = 32; i < 36; i++ ) {
		len += sprintf(page+len, "%c", scsi_inq[i]);
	}

	len += sprintf(page+len, "\n");

	i = scsi_inq[0] & 0x1f;

	len += sprintf(page+len, "  Type:   %s ",
		i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] :
		   "Unknown          ");

	len += sprintf(page+len,
	"                 ANSI SCSI revision: %02x", scsi_inq[2] & 0x07);

	if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
		len += sprintf(page+len, " CCS\n");
	else
		len += sprintf(page+len, "\n");

	return len;
}


/**
 * proc_rdrv_10()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_10(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 0, 9));
}


/**
 * proc_rdrv_20()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_20(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 10, 19));
}


/**
 * proc_rdrv_30()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_30(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 20, 29));
}


/**
 * proc_rdrv_40()
 * @page - buffer to write the data in
 * @start - where the actual data has been written in page
 * @offset - same meaning as the read system call
 * @count - same meaning as the read system call
 * @eof - set if no more data needs to be returned
 * @data - pointer to our soft state
 *
 * Display real time information about the logical drives 0 through 9.
 */
static int
proc_rdrv_40(char *page, char **start, off_t offset, int count, int *eof,
		void *data)
{
	adapter_t *adapter = (adapter_t *)data;

	*eof = 1;

	return (proc_rdrv(adapter, page, 30, 39));
}


/**
 * proc_rdrv()
 * @page - buffer to write the data in
 * @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_rdrv(adapter_t *adapter, char *page, 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	len = 0;
	int	i;

	if( make_local_pdev(adapter, &pdev) != 0 ) {
		return len;
	}

	if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
		free_local_pdev(pdev);
		return len;
	}

	if( mega_adapinq(adapter, dma_handle) != 0 ) {

		len = sprintf(page, "Adapter inquiry failed.\n");

		printk(KERN_WARNING "megaraid: inquiry failed.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		return len;
	}

	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 ) {
		len = sprintf(page, "memory not available.\n");

		mega_free_inquiry(inquiry, dma_handle, pdev);

		free_local_pdev(pdev);

		return len;
	}

	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, LOCK_INT, &mc, NULL) ) {

			len = sprintf(page, "40LD read config failed.\n");

			mega_free_inquiry(inquiry, dma_handle, pdev);

			pci_free_consistent(pdev, array_sz, disk_array,
					disk_array_dma_handle);

			free_local_pdev(pdev);

			return len;
		}

	}
	else {
		mc.cmd = NEW_READ_CONFIG_8LD;

		if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) ) {

			mc.cmd = READ_CONFIG_8LD;

			if( mega_internal_command(adapter, LOCK_INT, &mc,
						NULL) ){

				len = sprintf(page,
					"8LD read config failed.\n");

				mega_free_inquiry(inquiry, dma_handle, pdev);

				pci_free_consistent(pdev, array_sz,
						disk_array,
						disk_array_dma_handle);

				free_local_pdev(pdev);

				return len;
			}
		}
	}

	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.
		 */
		if( (len + 240) >= PAGE_SIZE ) break;

		len += sprintf(page+len, "Logical drive:%2d:, ", i);

		switch( rdrv_state[i] & 0x0F ) {
		case RDRV_OFFLINE:
			len += sprintf(page+len, "state: offline");
			break;

		case RDRV_DEGRADED:
			len += sprintf(page+len, "state: degraded");
			break;

		case RDRV_OPTIMAL:
			len += sprintf(page+len, "state: optimal");
			break;

		case RDRV_DELETED:
			len += sprintf(page+len, "state: deleted");
			break;

		default:
			len += sprintf(page+len, "state: unknown");
			break;
		}

		/*
		 * Check if check consistency or initialization is going on
		 * for this logical drive.
		 */
		if( (rdrv_state[i] & 0xF0) == 0x20 ) {
			len += sprintf(page+len,
					", check-consistency in progress");
		}
		else if( (rdrv_state[i] & 0xF0) == 0x10 ) {
			len += sprintf(page+len,
					", initialization in progress");
		}
		
		len += sprintf(page+len, "\n");

		len += sprintf(page+len, "Span depth:%3d, ",
				lparam->span_depth);

		len += sprintf(page+len, "RAID level:%3d, ",
				lparam->level);

		len += sprintf(page+len, "Stripe size:%3d, ",


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