/*
   *
   *			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
  ",
  				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.
  ",
  		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.
  ");
  
  
  	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.
  ");
  
  				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.
  ");
  
  			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.
  ");
  
  			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......!!
  ");
  	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
  ",
  					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.
  ",
  					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.
  ",
  					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.
  ");
  				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.
  ");
  	}
  	else {
  		printk(KERN_INFO "megaraid: reservation reset.
  ");
  	}

  #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>
  ",
  	     (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.
  ",

  					(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.
  ",

  					(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
  ", 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
  ");
  	else
  		seq_puts(m, "418/428/434
  ");

  	if(adapter->flag & BOARD_40LD)
  		seq_puts(m, "Controller Supports 40 Logical Drives
  ");

  	if(adapter->flag & BOARD_64BIT)
  		seq_puts(m, "Controller capable of 64-bit memory addressing
  ");
  	if( adapter->has_64bit_addr )
  		seq_puts(m, "Controller using 64-bit memory addressing
  ");
  	else
  		seq_puts(m, "Controller is not using 64-bit memory addressing
  ");
  
  	seq_printf(m, "Base = %08lx, Irq = %d, ",
  		   adapter->base, adapter->host->irq);
  
  	seq_printf(m, "Logical Drives = %d, Channels = %d
  ",
  		   adapter->numldrv, adapter->product_info.nchannels);
  
  	seq_printf(m, "Version =%s:%s, DRAM = %dMb
  ",
  		   adapter->fw_version, adapter->bios_version,
  		   adapter->product_info.dram_size);
  
  	seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d
  ",
  		   adapter->product_info.max_commands, adapter->max_cmds);
  
  	seq_printf(m, "support_ext_cdb    = %d
  ", adapter->support_ext_cdb);
  	seq_printf(m, "support_random_del = %d
  ", adapter->support_random_del);
  	seq_printf(m, "boot_ldrv_enabled  = %d
  ", adapter->boot_ldrv_enabled);
  	seq_printf(m, "boot_ldrv          = %d
  ", adapter->boot_ldrv);
  	seq_printf(m, "boot_pdrv_enabled  = %d
  ", adapter->boot_pdrv_enabled);
  	seq_printf(m, "boot_pdrv_ch       = %d
  ", adapter->boot_pdrv_ch);
  	seq_printf(m, "boot_pdrv_tgt      = %d
  ", adapter->boot_pdrv_tgt);
  	seq_printf(m, "quiescent          = %d
  ",
  		   atomic_read(&adapter->quiescent));
  	seq_printf(m, "has_cluster        = %d
  ", adapter->has_cluster);
  
  	seq_puts(m, "
  Module Parameters:
  ");
  	seq_printf(m, "max_cmd_per_lun    = %d
  ", max_cmd_per_lun);
  	seq_printf(m, "max_sectors_per_io = %d
  ", 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
  ");
  	seq_printf(m, "pend_cmds = %d
  ", atomic_read(&adapter->pend_cmds));

  #if MEGA_HAVE_STATS
  	for(i = 0; i < adapter->numldrv; i++) {

  		seq_printf(m, "Logical Drive %d:
  ", i);
  		seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu
  ",
  			   adapter->nreads[i], adapter->nwrites[i]);
  		seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu
  ",
  			   adapter->nreadblocks[i], adapter->nwriteblocks[i]);
  		seq_printf(m, "\tRead errors = %lu, Write errors = %lu
  
  ",
  			   adapter->rd_errors[i], adapter->wr_errors[i]);

  	}
  #else

  	seq_puts(m, "IO and error counters not compiled in driver.
  ");

  #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
  ");
  	seq_printf(m, "  Fw Command   = 0x%02x
  ", mbox->m_out.cmd);
  	seq_printf(m, "  Cmd Sequence = 0x%02x
  ", mbox->m_out.cmdid);
  	seq_printf(m, "  No of Sectors= %04d
  ", mbox->m_out.numsectors);
  	seq_printf(m, "  LBA          = 0x%02x
  ", mbox->m_out.lba);
  	seq_printf(m, "  DTA          = 0x%08x
  ", mbox->m_out.xferaddr);
  	seq_printf(m, "  Logical Drive= 0x%02x
  ", mbox->m_out.logdrv);
  	seq_printf(m, "  No of SG Elmt= 0x%02x
  ", mbox->m_out.numsgelements);
  	seq_printf(m, "  Busy         = %01x
  ", mbox->m_in.busy);
  	seq_printf(m, "  Status       = 0x%02x
  ", 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.
  ");

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

  		goto free_inquiry;

  	}

  	if( adapter->flag & BOARD_40LD )
  		seq_printf(m, "Rebuild Rate: [%d%%]
  ",
  			   ((mega_inquiry3 *)inquiry)->rebuild_rate);
  	else
  		seq_printf(m, "Rebuild Rate: [%d%%]
  ",

  			((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_printf(m, "Adapter inquiry failed.
  ");

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

  		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, '
  ');

  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, '
  ');

  	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
  ");
  	else
  		seq_putc(m, '
  ');

  }

  /**

   * 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.
  ");

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

  		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.
  ");

  		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, ".
  ");
  		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.
  ");

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

  		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.
  ");
  		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.
  ");
  			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.
  ");
  				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, '
  ');

  		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
  ", 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
  
  ");

  			break;

  		case DIRECT_IO:

  			seq_puts(m, "Direct IO
  
  ");

  			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 "
  megaraid: proc_mkdir failed
  ");
  		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 "
  megaraid: proc_create failed
  ");
  			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
  ",
  				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.
  ");
  			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.
  ");
  			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.
  ");
  			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.
  ");
  
  				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.
  ");
  
  			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.
  ",
  					i);
  		}
  		else {
  			printk(KERN_INFO "megaraid: channel[%d] is scsi.
  ",
  					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]
  ",

  			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
  ",
  		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!
  ");
  			goto out_disable_device;
  		}
  
  		mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
  		if (!mega_baseport) {
  			printk(KERN_WARNING
  			       "megaraid: could not map hba memory
  ");
  			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
  ",
  		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.
  ");
  		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.
  ");
  		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!
  ", 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
  megaraid: 3.00 or 3.01.  "
  				"This driver is known to have "
  				"corruption issues
  megaraid: with "
  				"those firmware versions on this "
  				"specific card.  In order
  megaraid: "
  				"to protect your data, please upgrade "
  				"your firmware to version
  megaraid: "
  				"3.10 or later, available from the "
  				"Dell Technical Support web
  "
  				"megaraid: site at
  http://support."
  				"dell.com/us/en/filelib/download/"
  				"index.asp?fileid=2940
  "
  			);
  		}
  	}
  
  	/*
  	 * 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
  "
  				"megaraid: do not support 64 bit "
  				"addressing.
  megaraid: DISABLING "
  				"64 bit support.
  ");
  			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
  ",
  			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!!
  ");
  
  	/*
  	 * 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
  ");
  	}
  #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
  ");
  	}
  
  	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: */