1 files changed, 5122 insertions, 0 deletions

diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
new file mode 100644
index 000000000000..8d707b29027d
--- /dev/null
+++ b/drivers/scsi/megaraid.c
@@ -0,0 +1,5122 @@
+/*
+ *
+ *                      Linux MegaRAID device driver
+ *
+ * Copyright © 2002  LSI Logic Corporation.
+ *
+ *         This program is free software; you can redistribute it and/or
+ *         modify it under the terms of the GNU General Public License
+ *         as published by the Free Software Foundation; either version
+ *         2 of the License, or (at your option) any later version.
+ *
+ * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
+ *        - fixes
+ *        - speed-ups (list handling fixes, issued_list, optimizations.)
+ *        - lots of cleanups.
+ *
+ * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
+ *        - new-style, hotplug-aware pci probing and scsi registration
+ *
+ * Version : v2.00.3 (Feb 19, 2003) - Atul Mukker <Atul.Mukker@lsil.com>
+ *
+ * Description: Linux device driver for LSI Logic MegaRAID controller
+ *
+ * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
+ *                                      518, 520, 531, 532
+ *
+ * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
+ * and others. Please send updates to the mailing list
+ * linux-scsi@vger.kernel.org .
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/blkdev.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/proc_fs.h>
+#include <linux/reboot.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <scsi/scsicam.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+
+#include "megaraid.h"
+
+#define MEGARAID_MODULE_VERSION "2.00.3"
+
+MODULE_AUTHOR ("LSI Logic Corporation");
+MODULE_DESCRIPTION ("LSI Logic MegaRAID driver");
+MODULE_LICENSE ("GPL");
+MODULE_VERSION(MEGARAID_MODULE_VERSION);
+
+static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
+module_param(max_cmd_per_lun, uint, 0);
+MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
+
+static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
+module_param(max_sectors_per_io, ushort, 0);
+MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
+
+
+static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
+module_param(max_mbox_busy_wait, ushort, 0);
+MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
+
+#define RDINDOOR(adapter)               readl((adapter)->base + 0x20)
+#define RDOUTDOOR(adapter)              readl((adapter)->base + 0x2C)
+#define WRINDOOR(adapter,value)         writel(value, (adapter)->base + 0x20)
+#define WROUTDOOR(adapter,value)        writel(value, (adapter)->base + 0x2C)
+
+/*
+ * Global variables
+ */
+
+static int hba_count;
+static adapter_t *hba_soft_state[MAX_CONTROLLERS];
+static struct proc_dir_entry *mega_proc_dir_entry;
+
+/* For controller re-ordering */
+static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
+
+/*
+ * The File Operations structure for the serial/ioctl interface of the driver
+ */
+static struct file_operations megadev_fops = {
+        .owner          = THIS_MODULE,
+        .ioctl          = megadev_ioctl,
+        .open           = megadev_open,
+};
+
+/*
+ * Array to structures for storing the information about the controllers. This
+ * information is sent to the user level applications, when they do an ioctl
+ * for this information.
+ */
+static struct mcontroller mcontroller[MAX_CONTROLLERS];
+
+/* The current driver version */
+static u32 driver_ver = 0x02000000;
+
+/* major number used by the device for character interface */
+static int major;
+
+#define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
+
+
+/*
+ * Debug variable to print some diagnostic messages
+ */
+static int trace_level;
+
+/**
+ * mega_setup_mailbox()
+ * @adapter - pointer to our soft state
+ *
+ * Allocates a 8 byte aligned memory for the handshake mailbox.
+ */
+static int
+mega_setup_mailbox(adapter_t *adapter)
+{
+        unsigned long   align;
+
+        adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
+                        sizeof(mbox64_t), &adapter->una_mbox64_dma);
+
+        if( !adapter->una_mbox64 ) return -1;
+                
+        adapter->mbox = &adapter->una_mbox64->mbox;
+
+        adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
+                        (~0UL ^ 0xFUL));
+
+        adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
+
+        align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
+
+        adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
+
+        /*
+         * Register the mailbox if the controller is an io-mapped controller
+         */
+        if( adapter->flag & BOARD_IOMAP ) {
+
+                outb_p(adapter->mbox_dma & 0xFF,
+                                adapter->host->io_port + MBOX_PORT0);
+
+                outb_p((adapter->mbox_dma >> 8) & 0xFF,
+                                adapter->host->io_port + MBOX_PORT1);
+
+                outb_p((adapter->mbox_dma >> 16) & 0xFF,
+                                adapter->host->io_port + MBOX_PORT2);
+
+                outb_p((adapter->mbox_dma >> 24) & 0xFF,
+                                adapter->host->io_port + MBOX_PORT3);
+
+                outb_p(ENABLE_MBOX_BYTE,
+                                adapter->host->io_port + ENABLE_MBOX_REGION);
+
+                irq_ack(adapter);
+
+                irq_enable(adapter);
+        }
+
+        return 0;
+}
+
+
+/*
+ * mega_query_adapter()
+ * @adapter - pointer to our soft state
+ *
+ * Issue the adapter inquiry commands to the controller and find out
+ * information and parameter about the devices attached
+ */
+static int
+mega_query_adapter(adapter_t *adapter)
+{
+        dma_addr_t      prod_info_dma_handle;
+        mega_inquiry3   *inquiry3;
+        u8      raw_mbox[sizeof(struct mbox_out)];
+        mbox_t  *mbox;
+        int     retval;
+
+        /* Initialize adapter inquiry mailbox */
+
+        mbox = (mbox_t *)raw_mbox;
+
+        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+        /*
+         * Try to issue Inquiry3 command
+         * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
+         * update enquiry3 structure
+         */
+        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+        inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
+
+        raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
+        raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
+        raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
+
+        /* Issue a blocking command to the card */
+        if ((retval = issue_scb_block(adapter, raw_mbox))) {
+                /* the adapter does not support 40ld */
+
+                mraid_ext_inquiry       *ext_inq;
+                mraid_inquiry           *inq;
+                dma_addr_t              dma_handle;
+
+                ext_inq = pci_alloc_consistent(adapter->dev,
+                                sizeof(mraid_ext_inquiry), &dma_handle);
+
+                if( ext_inq == NULL ) return -1;
+
+                inq = &ext_inq->raid_inq;
+
+                mbox->m_out.xferaddr = (u32)dma_handle;
+
+                /*issue old 0x04 command to adapter */
+                mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
+
+                issue_scb_block(adapter, raw_mbox);
+
+                /*
+                 * update Enquiry3 and ProductInfo structures with
+                 * mraid_inquiry structure
+                 */
+                mega_8_to_40ld(inq, inquiry3,
+                                (mega_product_info *)&adapter->product_info);
+
+                pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
+                                ext_inq, dma_handle);
+
+        } else {                /*adapter supports 40ld */
+                adapter->flag |= BOARD_40LD;
+
+                /*
+                 * get product_info, which is static information and will be
+                 * unchanged
+                 */
+                prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
+                                &adapter->product_info,
+                                sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
+
+                mbox->m_out.xferaddr = prod_info_dma_handle;
+
+                raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
+                raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
+
+                if ((retval = issue_scb_block(adapter, raw_mbox)))
+                        printk(KERN_WARNING
+                        "megaraid: Product_info cmd failed with error: %d\n",
+                                retval);
+
+                pci_unmap_single(adapter->dev, prod_info_dma_handle,
+                                sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
+        }
+
+
+        /*
+         * kernel scans the channels from 0 to <= max_channel
+         */
+        adapter->host->max_channel =
+                adapter->product_info.nchannels + NVIRT_CHAN -1;
+
+        adapter->host->max_id = 16;     /* max targets per channel */
+
+        adapter->host->max_lun = 7;     /* Upto 7 luns for non disk devices */
+
+        adapter->host->cmd_per_lun = max_cmd_per_lun;
+
+        adapter->numldrv = inquiry3->num_ldrv;
+
+        adapter->max_cmds = adapter->product_info.max_commands;
+
+        if(adapter->max_cmds > MAX_COMMANDS)
+                adapter->max_cmds = MAX_COMMANDS;
+
+        adapter->host->can_queue = adapter->max_cmds - 1;
+
+        /*
+         * Get the maximum number of scatter-gather elements supported by this
+         * firmware
+         */
+        mega_get_max_sgl(adapter);
+
+        adapter->host->sg_tablesize = adapter->sglen;
+
+
+        /* use HP firmware and bios version encoding */
+        if (adapter->product_info.subsysvid == HP_SUBSYS_VID) {
+                sprintf (adapter->fw_version, "%c%d%d.%d%d",
+                         adapter->product_info.fw_version[2],
+                         adapter->product_info.fw_version[1] >> 8,
+                         adapter->product_info.fw_version[1] & 0x0f,
+                         adapter->product_info.fw_version[0] >> 8,
+                         adapter->product_info.fw_version[0] & 0x0f);
+                sprintf (adapter->bios_version, "%c%d%d.%d%d",
+                         adapter->product_info.bios_version[2],
+                         adapter->product_info.bios_version[1] >> 8,
+                         adapter->product_info.bios_version[1] & 0x0f,
+                         adapter->product_info.bios_version[0] >> 8,
+                         adapter->product_info.bios_version[0] & 0x0f);
+        } else {
+                memcpy(adapter->fw_version,
+                                (char *)adapter->product_info.fw_version, 4);
+                adapter->fw_version[4] = 0;
+
+                memcpy(adapter->bios_version,
+                                (char *)adapter->product_info.bios_version, 4);
+
+                adapter->bios_version[4] = 0;
+        }
+
+        printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
+                adapter->fw_version, adapter->bios_version, adapter->numldrv);
+
+        /*
+         * Do we support extended (>10 bytes) cdbs
+         */
+        adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
+        if (adapter->support_ext_cdb)
+                printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
+
+
+        return 0;
+}
+
+/**
+ * mega_runpendq()
+ * @adapter - pointer to our soft state
+ *
+ * Runs through the list of pending requests.
+ */
+static inline void
+mega_runpendq(adapter_t *adapter)
+{
+        if(!list_empty(&adapter->pending_list))
+                __mega_runpendq(adapter);
+}
+
+/*
+ * megaraid_queue()
+ * @scmd - Issue this scsi command
+ * @done - the callback hook into the scsi mid-layer
+ *
+ * The command queuing entry point for the mid-layer.
+ */
+static int
+megaraid_queue(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
+{
+        adapter_t       *adapter;
+        scb_t   *scb;
+        int     busy=0;
+
+        adapter = (adapter_t *)scmd->device->host->hostdata;
+
+        scmd->scsi_done = done;
+
+
+        /*
+         * Allocate and build a SCB request
+         * busy flag will be set if mega_build_cmd() command could not
+         * allocate scb. We will return non-zero status in that case.
+         * NOTE: scb can be null even though certain commands completed
+         * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
+         * return 0 in that case.
+         */
+
+        scb = mega_build_cmd(adapter, scmd, &busy);
+
+        if(scb) {
+                scb->state |= SCB_PENDQ;
+                list_add_tail(&scb->list, &adapter->pending_list);
+
+                /*
+                 * Check if the HBA is in quiescent state, e.g., during a
+                 * delete logical drive opertion. If it is, don't run
+                 * the pending_list.
+                 */
+                if(atomic_read(&adapter->quiescent) == 0) {
+                        mega_runpendq(adapter);
+                }
+                return 0;
+        }
+
+        return busy;
+}
+
+/**
+ * mega_allocate_scb()
+ * @adapter - pointer to our soft state
+ * @cmd - scsi command from the mid-layer
+ *
+ * Allocate a SCB structure. This is the central structure for controller
+ * commands.
+ */
+static inline scb_t *
+mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
+{
+        struct list_head *head = &adapter->free_list;
+        scb_t   *scb;
+
+        /* Unlink command from Free List */
+        if( !list_empty(head) ) {
+
+                scb = list_entry(head->next, scb_t, list);
+
+                list_del_init(head->next);
+
+                scb->state = SCB_ACTIVE;
+                scb->cmd = cmd;
+                scb->dma_type = MEGA_DMA_TYPE_NONE;
+
+                return scb;
+        }
+
+        return NULL;
+}
+
+/**
+ * mega_get_ldrv_num()
+ * @adapter - pointer to our soft state
+ * @cmd - scsi mid layer command
+ * @channel - channel on the controller
+ *
+ * Calculate the logical drive number based on the information in scsi command
+ * and the channel number.
+ */
+static inline int
+mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
+{
+        int             tgt;
+        int             ldrv_num;
+
+        tgt = cmd->device->id;
+        
+        if ( tgt > adapter->this_id )
+                tgt--;  /* we do not get inquires for initiator id */
+
+        ldrv_num = (channel * 15) + tgt;
+
+
+        /*
+         * If we have a logical drive with boot enabled, project it first
+         */
+        if( adapter->boot_ldrv_enabled ) {
+                if( ldrv_num == 0 ) {
+                        ldrv_num = adapter->boot_ldrv;
+                }
+                else {
+                        if( ldrv_num <= adapter->boot_ldrv ) {
+                                ldrv_num--;
+                        }
+                }
+        }
+
+        /*
+         * If "delete logical drive" feature is enabled on this controller.
+         * Do only if at least one delete logical drive operation was done.
+         *
+         * Also, after logical drive deletion, instead of logical drive number,
+         * the value returned should be 0x80+logical drive id.
+         *
+         * These is valid only for IO commands.
+         */
+
+        if (adapter->support_random_del && adapter->read_ldidmap )
+                switch (cmd->cmnd[0]) {
+                case READ_6:    /* fall through */
+                case WRITE_6:   /* fall through */
+                case READ_10:   /* fall through */
+                case WRITE_10:
+                        ldrv_num += 0x80;
+                }
+
+        return ldrv_num;
+}
+
+/**
+ * mega_build_cmd()
+ * @adapter - pointer to our soft state
+ * @cmd - Prepare using this scsi command
+ * @busy - busy flag if no resources
+ *
+ * Prepares a command and scatter gather list for the controller. This routine
+ * also finds out if the commands is intended for a logical drive or a
+ * physical device and prepares the controller command accordingly.
+ *
+ * We also re-order the logical drives and physical devices based on their
+ * boot settings.
+ */
+static scb_t *
+mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
+{
+        mega_ext_passthru       *epthru;
+        mega_passthru   *pthru;
+        scb_t   *scb;
+        mbox_t  *mbox;
+        long    seg;
+        char    islogical;
+        int     max_ldrv_num;
+        int     channel = 0;
+        int     target = 0;
+        int     ldrv_num = 0;   /* logical drive number */
+
+
+        /*
+         * filter the internal and ioctl commands
+         */
+        if((cmd->cmnd[0] == MEGA_INTERNAL_CMD)) {
+                return cmd->buffer;
+        }
+
+
+        /*
+         * We know what channels our logical drives are on - mega_find_card()
+         */
+        islogical = adapter->logdrv_chan[cmd->device->channel];
+
+        /*
+         * The theory: If physical drive is chosen for boot, all the physical
+         * devices are exported before the logical drives, otherwise physical
+         * devices are pushed after logical drives, in which case - Kernel sees
+         * the physical devices on virtual channel which is obviously converted
+         * to actual channel on the HBA.
+         */
+        if( adapter->boot_pdrv_enabled ) {
+                if( islogical ) {
+                        /* logical channel */
+                        channel = cmd->device->channel -
+                                adapter->product_info.nchannels;
+                }
+                else {
+                        /* this is physical channel */
+                        channel = cmd->device->channel; 
+                        target = cmd->device->id;
+
+                        /*
+                         * boot from a physical disk, that disk needs to be
+                         * exposed first IF both the channels are SCSI, then
+                         * booting from the second channel is not allowed.
+                         */
+                        if( target == 0 ) {
+                                target = adapter->boot_pdrv_tgt;
+                        }
+                        else if( target == adapter->boot_pdrv_tgt ) {
+                                target = 0;
+                        }
+                }
+        }
+        else {
+                if( islogical ) {
+                        /* this is the logical channel */
+                        channel = cmd->device->channel; 
+                }
+                else {
+                        /* physical channel */
+                        channel = cmd->device->channel - NVIRT_CHAN;    
+                        target = cmd->device->id;
+                }
+        }
+
+
+        if(islogical) {
+
+                /* have just LUN 0 for each target on virtual channels */
+                if (cmd->device->lun) {
+                        cmd->result = (DID_BAD_TARGET << 16);
+                        cmd->scsi_done(cmd);
+                        return NULL;
+                }
+
+                ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
+
+
+                max_ldrv_num = (adapter->flag & BOARD_40LD) ?
+                        MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
+
+                /*
+                 * max_ldrv_num increases by 0x80 if some logical drive was
+                 * deleted.
+                 */
+                if(adapter->read_ldidmap)
+                        max_ldrv_num += 0x80;
+
+                if(ldrv_num > max_ldrv_num ) {
+                        cmd->result = (DID_BAD_TARGET << 16);
+                        cmd->scsi_done(cmd);
+                        return NULL;
+                }
+
+        }
+        else {
+                if( cmd->device->lun > 7) {
+                        /*
+                         * Do not support lun >7 for physically accessed
+                         * devices
+                         */
+                        cmd->result = (DID_BAD_TARGET << 16);
+                        cmd->scsi_done(cmd);
+                        return NULL;
+                }
+        }
+
+        /*
+         *
+         * Logical drive commands
+         *
+         */
+        if(islogical) {
+                switch (cmd->cmnd[0]) {
+                case TEST_UNIT_READY:
+                        memset(cmd->request_buffer, 0, cmd->request_bufflen);
+
+#if MEGA_HAVE_CLUSTERING
+                        /*
+                         * Do we support clustering and is the support enabled
+                         * If no, return success always
+                         */
+                        if( !adapter->has_cluster ) {
+                                cmd->result = (DID_OK << 16);
+                                cmd->scsi_done(cmd);
+                                return NULL;
+                        }
+
+                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
+                                *busy = 1;
+                                return NULL;
+                        }
+
+                        scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
+                        scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
+                        scb->raw_mbox[3] = ldrv_num;
+
+                        scb->dma_direction = PCI_DMA_NONE;
+
+                        return scb;
+#else
+                        cmd->result = (DID_OK << 16);
+                        cmd->scsi_done(cmd);
+                        return NULL;
+#endif
+
+                case MODE_SENSE:
+                        memset(cmd->request_buffer, 0, cmd->cmnd[4]);
+                        cmd->result = (DID_OK << 16);
+                        cmd->scsi_done(cmd);
+                        return NULL;
+
+                case READ_CAPACITY:
+                case INQUIRY:
+
+                        if(!(adapter->flag & (1L << cmd->device->channel))) {
+
+                                printk(KERN_NOTICE
+                                        "scsi%d: scanning scsi channel %d ",
+                                                adapter->host->host_no,
+                                                cmd->device->channel);
+                                printk("for logical drives.\n");
+
+                                adapter->flag |= (1L << cmd->device->channel);
+                        }
+
+                        /* Allocate a SCB and initialize passthru */
+                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
+                                *busy = 1;
+                                return NULL;
+                        }
+                        pthru = scb->pthru;
+
+                        mbox = (mbox_t *)scb->raw_mbox;
+                        memset(mbox, 0, sizeof(scb->raw_mbox));
+                        memset(pthru, 0, sizeof(mega_passthru));
+
+                        pthru->timeout = 0;
+                        pthru->ars = 1;
+                        pthru->reqsenselen = 14;
+                        pthru->islogical = 1;
+                        pthru->logdrv = ldrv_num;
+                        pthru->cdblen = cmd->cmd_len;
+                        memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
+
+                        if( adapter->has_64bit_addr ) {
+                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
+                        }
+                        else {
+                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
+                        }
+
+                        scb->dma_direction = PCI_DMA_FROMDEVICE;
+
+                        pthru->numsgelements = mega_build_sglist(adapter, scb,
+                                &pthru->dataxferaddr, &pthru->dataxferlen);
+
+                        mbox->m_out.xferaddr = scb->pthru_dma_addr;
+
+                        return scb;
+
+                case READ_6:
+                case WRITE_6:
+                case READ_10:
+                case WRITE_10:
+                case READ_12:
+                case WRITE_12:
+
+                        /* Allocate a SCB and initialize mailbox */
+                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
+                                *busy = 1;
+                                return NULL;
+                        }
+                        mbox = (mbox_t *)scb->raw_mbox;
+
+                        memset(mbox, 0, sizeof(scb->raw_mbox));
+                        mbox->m_out.logdrv = ldrv_num;
+
+                        /*
+                         * A little hack: 2nd bit is zero for all scsi read
+                         * commands and is set for all scsi write commands
+                         */
+                        if( adapter->has_64bit_addr ) {
+                                mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
+                                        MEGA_MBOXCMD_LWRITE64:
+                                        MEGA_MBOXCMD_LREAD64 ;
+                        }
+                        else {
+                                mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
+                                        MEGA_MBOXCMD_LWRITE:
+                                        MEGA_MBOXCMD_LREAD ;
+                        }
+
+                        /*
+                         * 6-byte READ(0x08) or WRITE(0x0A) cdb
+                         */
+                        if( cmd->cmd_len == 6 ) {
+                                mbox->m_out.numsectors = (u32) cmd->cmnd[4];
+                                mbox->m_out.lba =
+                                        ((u32)cmd->cmnd[1] << 16) |
+                                        ((u32)cmd->cmnd[2] << 8) |
+                                        (u32)cmd->cmnd[3];
+
+                                mbox->m_out.lba &= 0x1FFFFF;
+
+#if MEGA_HAVE_STATS
+                                /*
+                                 * Take modulo 0x80, since the logical drive
+                                 * number increases by 0x80 when a logical
+                                 * drive was deleted
+                                 */
+                                if (*cmd->cmnd == READ_6) {
+                                        adapter->nreads[ldrv_num%0x80]++;
+                                        adapter->nreadblocks[ldrv_num%0x80] +=
+                                                mbox->m_out.numsectors;
+                                } else {
+                                        adapter->nwrites[ldrv_num%0x80]++;
+                                        adapter->nwriteblocks[ldrv_num%0x80] +=
+                                                mbox->m_out.numsectors;
+                                }
+#endif
+                        }
+
+                        /*
+                         * 10-byte READ(0x28) or WRITE(0x2A) cdb
+                         */
+                        if( cmd->cmd_len == 10 ) {
+                                mbox->m_out.numsectors =
+                                        (u32)cmd->cmnd[8] |
+                                        ((u32)cmd->cmnd[7] << 8);
+                                mbox->m_out.lba =
+                                        ((u32)cmd->cmnd[2] << 24) |
+                                        ((u32)cmd->cmnd[3] << 16) |
+                                        ((u32)cmd->cmnd[4] << 8) |
+                                        (u32)cmd->cmnd[5];
+
+#if MEGA_HAVE_STATS
+                                if (*cmd->cmnd == READ_10) {
+                                        adapter->nreads[ldrv_num%0x80]++;
+                                        adapter->nreadblocks[ldrv_num%0x80] +=
+                                                mbox->m_out.numsectors;
+                                } else {
+                                        adapter->nwrites[ldrv_num%0x80]++;
+                                        adapter->nwriteblocks[ldrv_num%0x80] +=
+                                                mbox->m_out.numsectors;
+                                }
+#endif
+                        }
+
+                        /*
+                         * 12-byte READ(0xA8) or WRITE(0xAA) cdb
+                         */
+                        if( cmd->cmd_len == 12 ) {
+                                mbox->m_out.lba =
+                                        ((u32)cmd->cmnd[2] << 24) |
+                                        ((u32)cmd->cmnd[3] << 16) |
+                                        ((u32)cmd->cmnd[4] << 8) |
+                                        (u32)cmd->cmnd[5];
+
+                                mbox->m_out.numsectors =
+                                        ((u32)cmd->cmnd[6] << 24) |
+                                        ((u32)cmd->cmnd[7] << 16) |
+                                        ((u32)cmd->cmnd[8] << 8) |
+                                        (u32)cmd->cmnd[9];
+
+#if MEGA_HAVE_STATS
+                                if (*cmd->cmnd == READ_12) {
+                                        adapter->nreads[ldrv_num%0x80]++;
+                                        adapter->nreadblocks[ldrv_num%0x80] +=
+                                                mbox->m_out.numsectors;
+                                } else {
+                                        adapter->nwrites[ldrv_num%0x80]++;
+                                        adapter->nwriteblocks[ldrv_num%0x80] +=
+                                                mbox->m_out.numsectors;
+                                }
+#endif
+                        }
+
+                        /*
+                         * If it is a read command
+                         */
+                        if( (*cmd->cmnd & 0x0F) == 0x08 ) {
+                                scb->dma_direction = PCI_DMA_FROMDEVICE;
+                        }
+                        else {
+                                scb->dma_direction = PCI_DMA_TODEVICE;
+                        }
+
+                        /* Calculate Scatter-Gather info */
+                        mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
+                                        (u32 *)&mbox->m_out.xferaddr, (u32 *)&seg);
+
+                        return scb;
+
+#if MEGA_HAVE_CLUSTERING
+                case RESERVE:   /* Fall through */
+                case RELEASE:
+
+                        /*
+                         * Do we support clustering and is the support enabled
+                         */
+                        if( ! adapter->has_cluster ) {
+
+                                cmd->result = (DID_BAD_TARGET << 16);
+                                cmd->scsi_done(cmd);
+                                return NULL;
+                        }
+
+                        /* Allocate a SCB and initialize mailbox */
+                        if(!(scb = mega_allocate_scb(adapter, cmd))) {
+                                *busy = 1;
+                                return NULL;
+                        }
+
+                        scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
+                        scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
+                                MEGA_RESERVE_LD : MEGA_RELEASE_LD;
+
+                        scb->raw_mbox[3] = ldrv_num;
+
+                        scb->dma_direction = PCI_DMA_NONE;
+
+                        return scb;
+#endif
+
+                default:
+                        cmd->result = (DID_BAD_TARGET << 16);
+                        cmd->scsi_done(cmd);
+                        return NULL;
+                }
+        }
+
+        /*
+         * Passthru drive commands
+         */
+        else {
+                /* Allocate a SCB and initialize passthru */
+                if(!(scb = mega_allocate_scb(adapter, cmd))) {
+                        *busy = 1;
+                        return NULL;
+                }
+
+                mbox = (mbox_t *)scb->raw_mbox;
+                memset(mbox, 0, sizeof(scb->raw_mbox));
+
+                if( adapter->support_ext_cdb ) {
+
+                        epthru = mega_prepare_extpassthru(adapter, scb, cmd,
+                                        channel, target);
+
+                        mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
+
+                        mbox->m_out.xferaddr = scb->epthru_dma_addr;
+
+                }
+                else {
+
+                        pthru = mega_prepare_passthru(adapter, scb, cmd,
+                                        channel, target);
+
+                        /* Initialize mailbox */
+                        if( adapter->has_64bit_addr ) {
+                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
+                        }
+                        else {
+                                mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
+                        }
+
+                        mbox->m_out.xferaddr = scb->pthru_dma_addr;
+
+                }
+                return scb;
+        }
+        return NULL;
+}
+
+
+/**
+ * mega_prepare_passthru()
+ * @adapter - pointer to our soft state
+ * @scb - our scsi control block
+ * @cmd - scsi command from the mid-layer
+ * @channel - actual channel on the controller
+ * @target - actual id on the controller.
+ *
+ * prepare a command for the scsi physical devices.
+ */
+static mega_passthru *
+mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
+                int channel, int target)
+{
+        mega_passthru *pthru;
+
+        pthru = scb->pthru;
+        memset(pthru, 0, sizeof (mega_passthru));
+
+        /* 0=6sec/1=60sec/2=10min/3=3hrs */
+        pthru->timeout = 2;
+
+        pthru->ars = 1;
+        pthru->reqsenselen = 14;
+        pthru->islogical = 0;
+
+        pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
+
+        pthru->target = (adapter->flag & BOARD_40LD) ?
+                (channel << 4) | target : target;
+
+        pthru->cdblen = cmd->cmd_len;
+        pthru->logdrv = cmd->device->lun;
+
+        memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
+
+        /* Not sure about the direction */
+        scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
+
+        /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
+        switch (cmd->cmnd[0]) {
+        case INQUIRY:
+        case READ_CAPACITY:
+                if(!(adapter->flag & (1L << cmd->device->channel))) {
+
+                        printk(KERN_NOTICE
+                                "scsi%d: scanning scsi channel %d [P%d] ",
+                                        adapter->host->host_no,
+                                        cmd->device->channel, channel);
+                        printk("for physical devices.\n");
+
+                        adapter->flag |= (1L << cmd->device->channel);
+                }
+                /* Fall through */
+        default:
+                pthru->numsgelements = mega_build_sglist(adapter, scb,
+                                &pthru->dataxferaddr, &pthru->dataxferlen);
+                break;
+        }
+        return pthru;
+}
+
+
+/**
+ * mega_prepare_extpassthru()
+ * @adapter - pointer to our soft state
+ * @scb - our scsi control block
+ * @cmd - scsi command from the mid-layer
+ * @channel - actual channel on the controller
+ * @target - actual id on the controller.
+ *
+ * prepare a command for the scsi physical devices. This rountine prepares
+ * commands for devices which can take extended CDBs (>10 bytes)
+ */
+static mega_ext_passthru *
+mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
+                int channel, int target)
+{
+        mega_ext_passthru       *epthru;
+
+        epthru = scb->epthru;
+        memset(epthru, 0, sizeof(mega_ext_passthru));
+
+        /* 0=6sec/1=60sec/2=10min/3=3hrs */
+        epthru->timeout = 2;
+
+        epthru->ars = 1;
+        epthru->reqsenselen = 14;
+        epthru->islogical = 0;
+
+        epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
+        epthru->target = (adapter->flag & BOARD_40LD) ?
+                (channel << 4) | target : target;
+
+        epthru->cdblen = cmd->cmd_len;
+        epthru->logdrv = cmd->device->lun;
+
+        memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
+
+        /* Not sure about the direction */
+        scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
+
+        switch(cmd->cmnd[0]) {
+        case INQUIRY:
+        case READ_CAPACITY:
+                if(!(adapter->flag & (1L << cmd->device->channel))) {
+
+                        printk(KERN_NOTICE
+                                "scsi%d: scanning scsi channel %d [P%d] ",
+                                        adapter->host->host_no,
+                                        cmd->device->channel, channel);
+                        printk("for physical devices.\n");
+
+                        adapter->flag |= (1L << cmd->device->channel);
+                }
+                /* Fall through */
+        default:
+                epthru->numsgelements = mega_build_sglist(adapter, scb,
+                                &epthru->dataxferaddr, &epthru->dataxferlen);
+                break;
+        }
+
+        return epthru;
+}
+
+static void
+__mega_runpendq(adapter_t *adapter)
+{
+        scb_t *scb;
+        struct list_head *pos, *next;
+
+        /* Issue any pending commands to the card */
+        list_for_each_safe(pos, next, &adapter->pending_list) {
+
+                scb = list_entry(pos, scb_t, list);
+
+                if( !(scb->state & SCB_ISSUED) ) {
+
+                        if( issue_scb(adapter, scb) != 0 )
+                                return;
+                }
+        }
+
+        return;
+}
+
+
+/**
+ * issue_scb()
+ * @adapter - pointer to our soft state
+ * @scb - scsi control block
+ *
+ * Post a command to the card if the mailbox is available, otherwise return
+ * busy. We also take the scb from the pending list if the mailbox is
+ * available.
+ */
+static int
+issue_scb(adapter_t *adapter, scb_t *scb)
+{
+        volatile mbox64_t       *mbox64 = adapter->mbox64;
+        volatile mbox_t         *mbox = adapter->mbox;
+        unsigned int    i = 0;
+
+        if(unlikely(mbox->m_in.busy)) {
+                do {
+                        udelay(1);
+                        i++;
+                } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
+
+                if(mbox->m_in.busy) return -1;
+        }
+
+        /* Copy mailbox data into host structure */
+        memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox, 
+                        sizeof(struct mbox_out));
+
+        mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
+        mbox->m_in.busy = 1;            /* Set busy */
+
+
+        /*
+         * Increment the pending queue counter
+         */
+        atomic_inc(&adapter->pend_cmds);
+
+        switch (mbox->m_out.cmd) {
+        case MEGA_MBOXCMD_LREAD64:
+        case MEGA_MBOXCMD_LWRITE64:
+        case MEGA_MBOXCMD_PASSTHRU64:
+        case MEGA_MBOXCMD_EXTPTHRU:
+                mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
+                mbox64->xfer_segment_hi = 0;
+                mbox->m_out.xferaddr = 0xFFFFFFFF;
+                break;
+        default:
+                mbox64->xfer_segment_lo = 0;
+                mbox64->xfer_segment_hi = 0;
+        }
+
+        /*
+         * post the command
+         */
+        scb->state |= SCB_ISSUED;
+
+        if( likely(adapter->flag & BOARD_MEMMAP) ) {
+                mbox->m_in.poll = 0;
+                mbox->m_in.ack = 0;
+                WRINDOOR(adapter, adapter->mbox_dma | 0x1);
+        }
+        else {
+                irq_enable(adapter);
+                issue_command(adapter);
+        }
+
+        return 0;
+}
+
+/*
+ * Wait until the controller's mailbox is available
+ */
+static inline int
+mega_busywait_mbox (adapter_t *adapter)
+{
+        if (adapter->mbox->m_in.busy)
+                return __mega_busywait_mbox(adapter);
+        return 0;
+}
+
+/**
+ * issue_scb_block()
+ * @adapter - pointer to our soft state
+ * @raw_mbox - the mailbox
+ *
+ * Issue a scb in synchronous and non-interrupt mode
+ */
+static int
+issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
+{
+        volatile mbox64_t *mbox64 = adapter->mbox64;
+        volatile mbox_t *mbox = adapter->mbox;
+        u8      byte;
+
+        /* Wait until mailbox is free */
+        if(mega_busywait_mbox (adapter))
+                goto bug_blocked_mailbox;
+
+        /* Copy mailbox data into host structure */
+        memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
+        mbox->m_out.cmdid = 0xFE;
+        mbox->m_in.busy = 1;
+
+        switch (raw_mbox[0]) {
+        case MEGA_MBOXCMD_LREAD64:
+        case MEGA_MBOXCMD_LWRITE64:
+        case MEGA_MBOXCMD_PASSTHRU64:
+        case MEGA_MBOXCMD_EXTPTHRU:
+                mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
+                mbox64->xfer_segment_hi = 0;
+                mbox->m_out.xferaddr = 0xFFFFFFFF;
+                break;
+        default:
+                mbox64->xfer_segment_lo = 0;
+                mbox64->xfer_segment_hi = 0;
+        }
+
+        if( likely(adapter->flag & BOARD_MEMMAP) ) {
+                mbox->m_in.poll = 0;
+                mbox->m_in.ack = 0;
+                mbox->m_in.numstatus = 0xFF;
+                mbox->m_in.status = 0xFF;
+                WRINDOOR(adapter, adapter->mbox_dma | 0x1);
+
+                while((volatile u8)mbox->m_in.numstatus == 0xFF)
+                        cpu_relax();
+
+                mbox->m_in.numstatus = 0xFF;
+
+                while( (volatile u8)mbox->m_in.poll != 0x77 )
+                        cpu_relax();
+
+                mbox->m_in.poll = 0;
+                mbox->m_in.ack = 0x77;
+
+                WRINDOOR(adapter, adapter->mbox_dma | 0x2);
+
+                while(RDINDOOR(adapter) & 0x2)
+                        cpu_relax();
+        }
+        else {
+                irq_disable(adapter);
+                issue_command(adapter);
+
+                while (!((byte = irq_state(adapter)) & INTR_VALID))
+                        cpu_relax();
+
+                set_irq_state(adapter, byte);
+                irq_enable(adapter);
+                irq_ack(adapter);
+        }
+
+        return mbox->m_in.status;
+
+bug_blocked_mailbox:
+        printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
+        udelay (1000);
+        return -1;
+}
+
+
+/**
+ * megaraid_isr_iomapped()
+ * @irq - irq
+ * @devp - pointer to our soft state
+ * @regs - unused
+ *
+ * Interrupt service routine for io-mapped controllers.
+ * Find out if our device is interrupting. If yes, acknowledge the interrupt
+ * and service the completed commands.
+ */
+static irqreturn_t
+megaraid_isr_iomapped(int irq, void *devp, struct pt_regs *regs)
+{
+        adapter_t       *adapter = devp;
+        unsigned long   flags;
+        u8      status;
+        u8      nstatus;
+        u8      completed[MAX_FIRMWARE_STATUS];
+        u8      byte;
+        int     handled = 0;
+
+
+        /*
+         * loop till F/W has more commands for us to complete.
+         */
+        spin_lock_irqsave(&adapter->lock, flags);
+
+        do {
+                /* Check if a valid interrupt is pending */
+                byte = irq_state(adapter);
+                if( (byte & VALID_INTR_BYTE) == 0 ) {
+                        /*
+                         * No more pending commands
+                         */
+                        goto out_unlock;
+                }
+                set_irq_state(adapter, byte);
+
+                while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
+                                == 0xFF)
+                        cpu_relax();
+                adapter->mbox->m_in.numstatus = 0xFF;
+
+                status = adapter->mbox->m_in.status;
+
+                /*
+                 * decrement the pending queue counter
+                 */
+                atomic_sub(nstatus, &adapter->pend_cmds);
+
+                memcpy(completed, (void *)adapter->mbox->m_in.completed, 
+                                nstatus);
+
+                /* Acknowledge interrupt */
+                irq_ack(adapter);
+
+                mega_cmd_done(adapter, completed, nstatus, status);
+
+                mega_rundoneq(adapter);
+
+                handled = 1;
+
+                /* Loop through any pending requests */
+                if(atomic_read(&adapter->quiescent) == 0) {
+                        mega_runpendq(adapter);
+                }
+
+        } while(1);
+
+ out_unlock:
+
+        spin_unlock_irqrestore(&adapter->lock, flags);
+
+        return IRQ_RETVAL(handled);
+}
+
+
+/**
+ * megaraid_isr_memmapped()
+ * @irq - irq
+ * @devp - pointer to our soft state
+ * @regs - unused
+ *
+ * Interrupt service routine for memory-mapped controllers.
+ * Find out if our device is interrupting. If yes, acknowledge the interrupt
+ * and service the completed commands.
+ */
+static irqreturn_t
+megaraid_isr_memmapped(int irq, void *devp, struct pt_regs *regs)
+{
+        adapter_t       *adapter = devp;
+        unsigned long   flags;
+        u8      status;
+        u32     dword = 0;
+        u8      nstatus;
+        u8      completed[MAX_FIRMWARE_STATUS];
+        int     handled = 0;
+
+
+        /*
+         * loop till F/W has more commands for us to complete.
+         */
+        spin_lock_irqsave(&adapter->lock, flags);
+
+        do {
+                /* Check if a valid interrupt is pending */
+                dword = RDOUTDOOR(adapter);
+                if(dword != 0x10001234) {
+                        /*
+                         * No more pending commands
+                         */
+                        goto out_unlock;
+                }
+                WROUTDOOR(adapter, 0x10001234);
+
+                while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
+                                == 0xFF) {
+                        cpu_relax();
+                }
+                adapter->mbox->m_in.numstatus = 0xFF;
+
+                status = adapter->mbox->m_in.status;
+
+                /*
+                 * decrement the pending queue counter
+                 */
+                atomic_sub(nstatus, &adapter->pend_cmds);
+
+                memcpy(completed, (void *)adapter->mbox->m_in.completed, 
+                                nstatus);
+
+                /* Acknowledge interrupt */
+                WRINDOOR(adapter, 0x2);
+
+                handled = 1;
+
+                while( RDINDOOR(adapter) & 0x02 ) cpu_relax();
+
+                mega_cmd_done(adapter, completed, nstatus, status);
+
+                mega_rundoneq(adapter);
+
+                /* Loop through any pending requests */
+                if(atomic_read(&adapter->quiescent) == 0) {
+                        mega_runpendq(adapter);
+                }
+
+        } while(1);
+
+ out_unlock:
+
+        spin_unlock_irqrestore(&adapter->lock, flags);
+
+        return IRQ_RETVAL(handled);
+}
+/**
+ * mega_cmd_done()
+ * @adapter - pointer to our soft state
+ * @completed - array of ids of completed commands
+ * @nstatus - number of completed commands
+ * @status - status of the last command completed
+ *
+ * Complete the comamnds and call the scsi mid-layer callback hooks.
+ */
+static void
+mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
+{
+        mega_ext_passthru       *epthru = NULL;
+        struct scatterlist      *sgl;
+        Scsi_Cmnd       *cmd = NULL;
+        mega_passthru   *pthru = NULL;
+        mbox_t  *mbox = NULL;
+        u8      c;
+        scb_t   *scb;
+        int     islogical;
+        int     cmdid;
+        int     i;
+
+        /*
+         * for all the commands completed, call the mid-layer callback routine
+         * and free the scb.
+         */
+        for( i = 0; i < nstatus; i++ ) {
+
+                cmdid = completed[i];
+
+                if( cmdid == CMDID_INT_CMDS ) { /* internal command */
+                        scb = &adapter->int_scb;
+                        cmd = scb->cmd;
+                        mbox = (mbox_t *)scb->raw_mbox;
+
+                        /*
+                         * Internal command interface do not fire the extended
+                         * passthru or 64-bit passthru
+                         */
+                        pthru = scb->pthru;
+
+                }
+                else {
+                        scb = &adapter->scb_list[cmdid];
+
+                        /*
+                         * Make sure f/w has completed a valid command
+                         */
+                        if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
+                                printk(KERN_CRIT
+                                        "megaraid: invalid command ");
+                                printk("Id %d, scb->state:%x, scsi cmd:%p\n",
+                                        cmdid, scb->state, scb->cmd);
+
+                                continue;
+                        }
+
+                        /*
+                         * Was a abort issued for this command
+                         */
+                        if( scb->state & SCB_ABORT ) {
+
+                                printk(KERN_WARNING
+                                "megaraid: aborted cmd %lx[%x] complete.\n",
+                                        scb->cmd->serial_number, scb->idx);
+
+                                scb->cmd->result = (DID_ABORT << 16);
+
+                                list_add_tail(SCSI_LIST(scb->cmd),
+                                                &adapter->completed_list);
+
+                                mega_free_scb(adapter, scb);
+
+                                continue;
+                        }
+
+                        /*
+                         * Was a reset issued for this command
+                         */
+                        if( scb->state & SCB_RESET ) {
+
+                                printk(KERN_WARNING
+                                "megaraid: reset cmd %lx[%x] complete.\n",
+                                        scb->cmd->serial_number, scb->idx);
+
+                                scb->cmd->result = (DID_RESET << 16);
+
+                                list_add_tail(SCSI_LIST(scb->cmd),
+                                                &adapter->completed_list);
+
+                                mega_free_scb (adapter, scb);
+
+                                continue;
+                        }
+
+                        cmd = scb->cmd;
+                        pthru = scb->pthru;
+                        epthru = scb->epthru;
+                        mbox = (mbox_t *)scb->raw_mbox;
+
+#if MEGA_HAVE_STATS
+                        {
+
+                        int     logdrv = mbox->m_out.logdrv;
+
+                        islogical = adapter->logdrv_chan[cmd->channel];
+                        /*
+                         * Maintain an error counter for the logical drive.
+                         * Some application like SNMP agent need such
+                         * statistics
+                         */
+                        if( status && islogical && (cmd->cmnd[0] == READ_6 ||
+                                                cmd->cmnd[0] == READ_10 ||
+                                                cmd->cmnd[0] == READ_12)) {
+                                /*
+                                 * Logical drive number increases by 0x80 when
+                                 * a logical drive is deleted
+                                 */
+                                adapter->rd_errors[logdrv%0x80]++;
+                        }
+
+                        if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
+                                                cmd->cmnd[0] == WRITE_10 ||
+                                                cmd->cmnd[0] == WRITE_12)) {
+                                /*
+                                 * Logical drive number increases by 0x80 when
+                                 * a logical drive is deleted
+                                 */
+                                adapter->wr_errors[logdrv%0x80]++;
+                        }
+
+                        }
+#endif
+                }
+
+                /*
+                 * Do not return the presence of hard disk on the channel so,
+                 * inquiry sent, and returned data==hard disk or removable
+                 * hard disk and not logical, request should return failure! -
+                 * PJ
+                 */
+                islogical = adapter->logdrv_chan[cmd->device->channel];
+                if( cmd->cmnd[0] == INQUIRY && !islogical ) {
+
+                        if( cmd->use_sg ) {
+                                sgl = (struct scatterlist *)
+                                        cmd->request_buffer;
+
+                                if( sgl->page ) {
+                                        c = *(unsigned char *)
+                                        page_address((&sgl[0])->page) +
+                                        (&sgl[0])->offset; 
+                                }
+                                else {
+                                        printk(KERN_WARNING
+                                                "megaraid: invalid sg.\n");
+                                        c = 0;
+                                }
+                        }
+                        else {
+                                c = *(u8 *)cmd->request_buffer;
+                        }
+
+                        if(IS_RAID_CH(adapter, cmd->device->channel) &&
+                                        ((c & 0x1F ) == TYPE_DISK)) {
+                                status = 0xF0;
+                        }
+                }
+
+                /* clear result; otherwise, success returns corrupt value */
+                cmd->result = 0;
+
+                /* Convert MegaRAID status to Linux error code */
+                switch (status) {
+                case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
+                        cmd->result |= (DID_OK << 16);
+                        break;
+
+                case 0x02:      /* ERROR_ABORTED, i.e.
+                                   SCSI_STATUS_CHECK_CONDITION */
+
+                        /* set sense_buffer and result fields */
+                        if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
+                                mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
+
+                                memcpy(cmd->sense_buffer, pthru->reqsensearea,
+                                                14);
+
+                                cmd->result = (DRIVER_SENSE << 24) |
+                                        (DID_OK << 16) |
+                                        (CHECK_CONDITION << 1);
+                        }
+                        else {
+                                if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
+
+                                        memcpy(cmd->sense_buffer,
+                                                epthru->reqsensearea, 14);
+
+                                        cmd->result = (DRIVER_SENSE << 24) |
+                                                (DID_OK << 16) |
+                                                (CHECK_CONDITION << 1);
+                                } else {
+                                        cmd->sense_buffer[0] = 0x70;
+                                        cmd->sense_buffer[2] = ABORTED_COMMAND;
+                                        cmd->result |= (CHECK_CONDITION << 1);
+                                }
+                        }
+                        break;
+
+                case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
+                                   SCSI_STATUS_BUSY */
+                        cmd->result |= (DID_BUS_BUSY << 16) | status;
+                        break;
+
+                default:
+#if MEGA_HAVE_CLUSTERING
+                        /*
+                         * If TEST_UNIT_READY fails, we know
+                         * MEGA_RESERVATION_STATUS failed
+                         */
+                        if( cmd->cmnd[0] == TEST_UNIT_READY ) {
+                                cmd->result |= (DID_ERROR << 16) |
+                                        (RESERVATION_CONFLICT << 1);
+                        }
+                        else
+                        /*
+                         * Error code returned is 1 if Reserve or Release
+                         * failed or the input parameter is invalid
+                         */
+                        if( status == 1 &&
+                                (cmd->cmnd[0] == RESERVE ||
+                                         cmd->cmnd[0] == RELEASE) ) {
+
+                                cmd->result |= (DID_ERROR << 16) |
+                                        (RESERVATION_CONFLICT << 1);
+                        }
+                        else
+#endif
+                                cmd->result |= (DID_BAD_TARGET << 16)|status;
+                }
+
+                /*
+                 * Only free SCBs for the commands coming down from the
+                 * mid-layer, not for which were issued internally
+                 *
+                 * For internal command, restore the status returned by the
+                 * firmware so that user can interpret it.
+                 */
+                if( cmdid == CMDID_INT_CMDS ) { /* internal command */
+                        cmd->result = status;
+
+                        /*
+                         * Remove the internal command from the pending list
+                         */
+                        list_del_init(&scb->list);
+                        scb->state = SCB_FREE;
+                }
+                else {
+                        mega_free_scb(adapter, scb);
+                }
+
+                /* Add Scsi_Command to end of completed queue */
+                list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
+        }
+}
+
+
+/*
+ * mega_runpendq()
+ *
+ * Run through the list of completed requests and finish it
+ */
+static void
+mega_rundoneq (adapter_t *adapter)
+{
+        Scsi_Cmnd *cmd;
+        struct list_head *pos;
+
+        list_for_each(pos, &adapter->completed_list) {
+
+                Scsi_Pointer* spos = (Scsi_Pointer *)pos;
+
+                cmd = list_entry(spos, Scsi_Cmnd, SCp);
+                cmd->scsi_done(cmd);
+        }
+
+        INIT_LIST_HEAD(&adapter->completed_list);
+}
+
+
+/*
+ * Free a SCB structure
+ * Note: We assume the scsi commands associated with this scb is not free yet.
+ */
+static void
+mega_free_scb(adapter_t *adapter, scb_t *scb)
+{
+        switch( scb->dma_type ) {
+
+        case MEGA_DMA_TYPE_NONE:
+                break;
+
+        case MEGA_BULK_DATA:
+                pci_unmap_page(adapter->dev, scb->dma_h_bulkdata,
+                        scb->cmd->request_bufflen, scb->dma_direction);
+                break;
+
+        case MEGA_SGLIST:
+                pci_unmap_sg(adapter->dev, scb->cmd->request_buffer,
+                        scb->cmd->use_sg, scb->dma_direction);
+                break;
+
+        default:
+                break;
+        }
+
+        /*
+         * Remove from the pending list
+         */
+        list_del_init(&scb->list);
+
+        /* Link the scb back into free list */
+        scb->state = SCB_FREE;
+        scb->cmd = NULL;
+
+        list_add(&scb->list, &adapter->free_list);
+}
+
+
+static int
+__mega_busywait_mbox (adapter_t *adapter)
+{
+        volatile mbox_t *mbox = adapter->mbox;
+        long counter;
+
+        for (counter = 0; counter < 10000; counter++) {
+                if (!mbox->m_in.busy)
+                        return 0;
+                udelay(100); yield();
+        }
+        return -1;              /* give up after 1 second */
+}
+
+/*
+ * Copies data to SGLIST
+ * Note: For 64 bit cards, we need a minimum of one SG element for read/write
+ */
+static int
+mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
+{
+        struct scatterlist      *sgl;
+        struct page     *page;
+        unsigned long   offset;
+        Scsi_Cmnd       *cmd;
+        int     sgcnt;
+        int     idx;
+
+        cmd = scb->cmd;
+
+        /* Scatter-gather not used */
+        if( !cmd->use_sg ) {
+
+                page = virt_to_page(cmd->request_buffer);
+                offset = offset_in_page(cmd->request_buffer);
+
+                scb->dma_h_bulkdata = pci_map_page(adapter->dev,
+                                                  page, offset,
+                                                  cmd->request_bufflen,
+                                                  scb->dma_direction);
+                scb->dma_type = MEGA_BULK_DATA;
+
+                /*
+                 * We need to handle special 64-bit commands that need a
+                 * minimum of 1 SG
+                 */
+                if( adapter->has_64bit_addr ) {
+                        scb->sgl64[0].address = scb->dma_h_bulkdata;
+                        scb->sgl64[0].length = cmd->request_bufflen;
+                        *buf = (u32)scb->sgl_dma_addr;
+                        *len = (u32)cmd->request_bufflen;
+                        return 1;
+                }
+                else {
+                        *buf = (u32)scb->dma_h_bulkdata;
+                        *len = (u32)cmd->request_bufflen;
+                }
+                return 0;
+        }
+
+        sgl = (struct scatterlist *)cmd->request_buffer;
+
+        /*
+         * Copy Scatter-Gather list info into controller structure.
+         *
+         * The number of sg elements returned must not exceed our limit
+         */
+        sgcnt = pci_map_sg(adapter->dev, sgl, cmd->use_sg,
+                        scb->dma_direction);
+
+        scb->dma_type = MEGA_SGLIST;
+
+        if( sgcnt > adapter->sglen ) BUG();
+
+        for( idx = 0; idx < sgcnt; idx++, sgl++ ) {
+
+                if( adapter->has_64bit_addr ) {
+                        scb->sgl64[idx].address = sg_dma_address(sgl);
+                        scb->sgl64[idx].length = sg_dma_len(sgl);
+                }
+                else {
+                        scb->sgl[idx].address = sg_dma_address(sgl);
+                        scb->sgl[idx].length = sg_dma_len(sgl);
+                }
+        }
+
+        /* Reset pointer and length fields */
+        *buf = scb->sgl_dma_addr;
+
+        /*
+         * For passthru command, dataxferlen must be set, even for commands
+         * with a sg list
+         */
+        *len = (u32)cmd->request_bufflen;
+
+        /* Return count of SG requests */
+        return sgcnt;
+}
+
+
+/*
+ * mega_8_to_40ld()
+ *
+ * takes all info in AdapterInquiry structure and puts it into ProductInfo and
+ * Enquiry3 structures for later use
+ */
+static void
+mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
+                mega_product_info *product_info)
+{
+        int i;
+
+        product_info->max_commands = inquiry->adapter_info.max_commands;
+        enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
+        product_info->nchannels = inquiry->adapter_info.nchannels;
+
+        for (i = 0; i < 4; i++) {
+                product_info->fw_version[i] =
+                        inquiry->adapter_info.fw_version[i];
+
+                product_info->bios_version[i] =
+                        inquiry->adapter_info.bios_version[i];
+        }
+        enquiry3->cache_flush_interval =
+                inquiry->adapter_info.cache_flush_interval;
+
+        product_info->dram_size = inquiry->adapter_info.dram_size;
+
+        enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
+
+        for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
+                enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
+                enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
+                enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
+        }
+
+        for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
+                enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
+}
+
+static inline void
+mega_free_sgl(adapter_t *adapter)
+{
+        scb_t   *scb;
+        int     i;
+
+        for(i = 0; i < adapter->max_cmds; i++) {
+
+                scb = &adapter->scb_list[i];
+
+                if( scb->sgl64 ) {
+                        pci_free_consistent(adapter->dev,
+                                sizeof(mega_sgl64) * adapter->sglen,
+                                scb->sgl64,
+                                scb->sgl_dma_addr);
+
+                        scb->sgl64 = NULL;
+                }
+
+                if( scb->pthru ) {
+                        pci_free_consistent(adapter->dev, sizeof(mega_passthru),
+                                scb->pthru, scb->pthru_dma_addr);
+
+                        scb->pthru = NULL;
+                }
+
+                if( scb->epthru ) {
+                        pci_free_consistent(adapter->dev,
+                                sizeof(mega_ext_passthru),
+                                scb->epthru, scb->epthru_dma_addr);
+
+                        scb->epthru = NULL;
+                }
+
+        }
+}
+
+
+/*
+ * Get information about the card/driver
+ */
+const char *
+megaraid_info(struct Scsi_Host *host)
+{
+        static char buffer[512];
+        adapter_t *adapter;
+
+        adapter = (adapter_t *)host->hostdata;
+
+        sprintf (buffer,
+                 "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
+                 adapter->fw_version, adapter->product_info.max_commands,
+                 adapter->host->max_id, adapter->host->max_channel,
+                 adapter->host->max_lun);
+        return buffer;
+}
+
+/*
+ * Abort a previous SCSI request. Only commands on the pending list can be
+ * aborted. All the commands issued to the F/W must complete.
+ */
+static int
+megaraid_abort(Scsi_Cmnd *cmd)
+{
+        adapter_t       *adapter;
+        int             rval;
+
+        adapter = (adapter_t *)cmd->device->host->hostdata;
+
+        rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
+
+        /*
+         * This is required here to complete any completed requests
+         * to be communicated over to the mid layer.
+         */
+        mega_rundoneq(adapter);
+
+        return rval;
+}
+
+
+static int
+megaraid_reset(Scsi_Cmnd *cmd)
+{
+        adapter_t       *adapter;
+        megacmd_t       mc;
+        int             rval;
+
+        adapter = (adapter_t *)cmd->device->host->hostdata;
+
+#if MEGA_HAVE_CLUSTERING
+        mc.cmd = MEGA_CLUSTER_CMD;
+        mc.opcode = MEGA_RESET_RESERVATIONS;
+
+        spin_unlock_irq(&adapter->lock);
+        if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) != 0 ) {
+                printk(KERN_WARNING
+                                "megaraid: reservation reset failed.\n");
+        }
+        else {
+                printk(KERN_INFO "megaraid: reservation reset.\n");
+        }
+        spin_lock_irq(&adapter->lock);
+#endif
+
+        rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
+
+        /*
+         * This is required here to complete any completed requests
+         * to be communicated over to the mid layer.
+         */
+        mega_rundoneq(adapter);
+
+        return rval;
+}
+
+
+
+/**
+ * megaraid_abort_and_reset()
+ * @adapter - megaraid soft state
+ * @cmd - scsi command to be aborted or reset
+ * @aor - abort or reset flag
+ *
+ * Try to locate the scsi command in the pending queue. If found and is not
+ * issued to the controller, abort/reset it. Otherwise return failure
+ */
+static int
+megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
+{
+        struct list_head        *pos, *next;
+        scb_t                   *scb;
+
+        printk(KERN_WARNING "megaraid: %s-%lx cmd=%x <c=%d t=%d l=%d>\n",
+             (aor == SCB_ABORT)? "ABORTING":"RESET", cmd->serial_number,
+             cmd->cmnd[0], cmd->device->channel, 
+             cmd->device->id, cmd->device->lun);
+
+        if(list_empty(&adapter->pending_list))
+                return FALSE;
+
+        list_for_each_safe(pos, next, &adapter->pending_list) {
+
+                scb = list_entry(pos, scb_t, list);
+
+                if (scb->cmd == cmd) { /* Found command */
+
+                        scb->state |= aor;
+
+                        /*
+                         * Check if this command has firmare owenership. If
+                         * yes, we cannot reset this command. Whenever, f/w
+                         * completes this command, we will return appropriate
+                         * status from ISR.
+                         */
+                        if( scb->state & SCB_ISSUED ) {
+
+                                printk(KERN_WARNING
+                                        "megaraid: %s-%lx[%x], fw owner.\n",
+                                        (aor==SCB_ABORT) ? "ABORTING":"RESET",
+                                        cmd->serial_number, scb->idx);
+
+                                return FALSE;
+                        }
+                        else {
+
+                                /*
+                                 * Not yet issued! Remove from the pending
+                                 * list
+                                 */
+                                printk(KERN_WARNING
+                                        "megaraid: %s-%lx[%x], driver owner.\n",
+                                        (aor==SCB_ABORT) ? "ABORTING":"RESET",
+                                        cmd->serial_number, scb->idx);
+
+                                mega_free_scb(adapter, scb);
+
+                                if( aor == SCB_ABORT ) {
+                                        cmd->result = (DID_ABORT << 16);
+                                }
+                                else {
+                                        cmd->result = (DID_RESET << 16);
+                                }
+
+                                list_add_tail(SCSI_LIST(cmd),
+                                                &adapter->completed_list);
+
+                                return TRUE;
+                        }
+                }
+        }
+
+        return FALSE;
+}
+
+static inline int
+make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
+{
+        *pdev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
+
+        if( *pdev == NULL ) return -1;
+
+        memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
+
+        if( pci_set_dma_mask(*pdev, 0xffffffff) != 0 ) {
+                kfree(*pdev);
+                return -1;
+        }
+
+        return 0;
+}
+
+static inline void
+free_local_pdev(struct pci_dev *pdev)
+{
+        kfree(pdev);
+}
+
+/**
+ * mega_allocate_inquiry()
+ * @dma_handle - handle returned for dma address
+ * @pdev - handle to pci device
+ *
+ * allocates memory for inquiry structure
+ */
+static inline void *
+mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
+{
+        return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
+}
+
+
+static inline void
+mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
+{
+        pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
+}
+
+
+#ifdef CONFIG_PROC_FS
+/* Following code handles /proc fs  */
+
+#define CREATE_READ_PROC(string, func)  create_proc_read_entry(string,  \
+                                        S_IRUSR | S_IFREG,              \
+                                        controller_proc_dir_entry,      \
+                                        func, adapter)
+
+/**
+ * mega_create_proc_entry()
+ * @index - index in soft state array
+ * @parent - parent node for this /proc entry
+ *
+ * Creates /proc entries for our controllers.
+ */
+static void
+mega_create_proc_entry(int index, struct proc_dir_entry *parent)
+{
+        struct proc_dir_entry   *controller_proc_dir_entry = NULL;
+        u8              string[64] = { 0 };
+        adapter_t       *adapter = hba_soft_state[index];
+
+        sprintf(string, "hba%d", adapter->host->host_no);
+
+        controller_proc_dir_entry =
+                adapter->controller_proc_dir_entry = proc_mkdir(string, parent);
+
+        if(!controller_proc_dir_entry) {
+                printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
+                return;
+        }
+        adapter->proc_read = CREATE_READ_PROC("config", proc_read_config);
+        adapter->proc_stat = CREATE_READ_PROC("stat", proc_read_stat);
+        adapter->proc_mbox = CREATE_READ_PROC("mailbox", proc_read_mbox);
+#if MEGA_HAVE_ENH_PROC
+        adapter->proc_rr = CREATE_READ_PROC("rebuild-rate", proc_rebuild_rate);
+        adapter->proc_battery = CREATE_READ_PROC("battery-status",
+                        proc_battery);
+
+        /*
+         * Display each physical drive on its channel
+         */
+        adapter->proc_pdrvstat[0] = CREATE_READ_PROC("diskdrives-ch0",
+                                        proc_pdrv_ch0);
+        adapter->proc_pdrvstat[1] = CREATE_READ_PROC("diskdrives-ch1",
+                                        proc_pdrv_ch1);
+        adapter->proc_pdrvstat[2] = CREATE_READ_PROC("diskdrives-ch2",
+                                        proc_pdrv_ch2);
+        adapter->proc_pdrvstat[3] = CREATE_READ_PROC("diskdrives-ch3",
+                                        proc_pdrv_ch3);
+
+        /*
+         * Display a set of up to 10 logical drive through each of following
+         * /proc entries
+         */
+        adapter->proc_rdrvstat[0] = CREATE_READ_PROC("raiddrives-0-9",
+                                        proc_rdrv_10);
+        adapter->proc_rdrvstat[1] = CREATE_READ_PROC("raiddrives-10-19",
+                                        proc_rdrv_20);
+        adapter->proc_rdrvstat[2] = CREATE_READ_PROC("raiddrives-20-29",
+                                        proc_rdrv_30);
+        adapter->proc_rdrvstat[3] = CREATE_READ_PROC("raiddrives-30-39",
+                                        proc_rdrv_40);
+#endif
+}
+
+
+/**
+ * proc_read_config()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display configuration information about the controller.
+ */
+static int
+proc_read_config(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+
+        adapter_t *adapter = (adapter_t *)data;
+        int len = 0;
+
+        len += sprintf(page+len, "%s", MEGARAID_VERSION);
+
+        if(adapter->product_info.product_name[0])
+                len += sprintf(page+len, "%s\n",
+                                adapter->product_info.product_name);
+
+        len += sprintf(page+len, "Controller Type: ");
+
+        if( adapter->flag & BOARD_MEMMAP ) {
+                len += sprintf(page+len,
+                        "438/466/467/471/493/518/520/531/532\n");
+        }
+        else {
+                len += sprintf(page+len,
+                        "418/428/434\n");
+        }
+
+        if(adapter->flag & BOARD_40LD) {
+                len += sprintf(page+len,
+                                "Controller Supports 40 Logical Drives\n");
+        }
+
+        if(adapter->flag & BOARD_64BIT) {
+                len += sprintf(page+len,
+                "Controller capable of 64-bit memory addressing\n");
+        }
+        if( adapter->has_64bit_addr ) {
+                len += sprintf(page+len,
+                        "Controller using 64-bit memory addressing\n");
+        }
+        else {
+                len += sprintf(page+len,
+                        "Controller is not using 64-bit memory addressing\n");
+        }
+
+        len += sprintf(page+len, "Base = %08lx, Irq = %d, ", adapter->base,
+                        adapter->host->irq);
+
+        len += sprintf(page+len, "Logical Drives = %d, Channels = %d\n",
+                        adapter->numldrv, adapter->product_info.nchannels);
+
+        len += sprintf(page+len, "Version =%s:%s, DRAM = %dMb\n",
+                        adapter->fw_version, adapter->bios_version,
+                        adapter->product_info.dram_size);
+
+        len += sprintf(page+len,
+                "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
+                adapter->product_info.max_commands, adapter->max_cmds);
+
+        len += sprintf(page+len, "support_ext_cdb    = %d\n",
+                        adapter->support_ext_cdb);
+        len += sprintf(page+len, "support_random_del = %d\n",
+                        adapter->support_random_del);
+        len += sprintf(page+len, "boot_ldrv_enabled  = %d\n",
+                        adapter->boot_ldrv_enabled);
+        len += sprintf(page+len, "boot_ldrv          = %d\n",
+                        adapter->boot_ldrv);
+        len += sprintf(page+len, "boot_pdrv_enabled  = %d\n",
+                        adapter->boot_pdrv_enabled);
+        len += sprintf(page+len, "boot_pdrv_ch       = %d\n",
+                        adapter->boot_pdrv_ch);
+        len += sprintf(page+len, "boot_pdrv_tgt      = %d\n",
+                        adapter->boot_pdrv_tgt);
+        len += sprintf(page+len, "quiescent          = %d\n",
+                        atomic_read(&adapter->quiescent));
+        len += sprintf(page+len, "has_cluster        = %d\n",
+                        adapter->has_cluster);
+
+        len += sprintf(page+len, "\nModule Parameters:\n");
+        len += sprintf(page+len, "max_cmd_per_lun    = %d\n",
+                        max_cmd_per_lun);
+        len += sprintf(page+len, "max_sectors_per_io = %d\n",
+                        max_sectors_per_io);
+
+        *eof = 1;
+
+        return len;
+}
+
+
+
+/**
+ * proc_read_stat()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Diaplay statistical information about the I/O activity.
+ */
+static int
+proc_read_stat(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t       *adapter;
+        int     len;
+        int     i;
+
+        i = 0;  /* avoid compilation warnings */
+        len = 0;
+        adapter = (adapter_t *)data;
+
+        len = sprintf(page, "Statistical Information for this controller\n");
+        len += sprintf(page+len, "pend_cmds = %d\n",
+                        atomic_read(&adapter->pend_cmds));
+#if MEGA_HAVE_STATS
+        for(i = 0; i < adapter->numldrv; i++) {
+                len += sprintf(page+len, "Logical Drive %d:\n", i);
+
+                len += sprintf(page+len,
+                        "\tReads Issued = %lu, Writes Issued = %lu\n",
+                        adapter->nreads[i], adapter->nwrites[i]);
+
+                len += sprintf(page+len,
+                        "\tSectors Read = %lu, Sectors Written = %lu\n",
+                        adapter->nreadblocks[i], adapter->nwriteblocks[i]);
+
+                len += sprintf(page+len,
+                        "\tRead errors = %lu, Write errors = %lu\n\n",
+                        adapter->rd_errors[i], adapter->wr_errors[i]);
+        }
+#else
+        len += sprintf(page+len,
+                        "IO and error counters not compiled in driver.\n");
+#endif
+
+        *eof = 1;
+
+        return len;
+}
+
+
+/**
+ * proc_read_mbox()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display mailbox information for the last command issued. This information
+ * is good for debugging.
+ */
+static int
+proc_read_mbox(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+
+        adapter_t       *adapter = (adapter_t *)data;
+        volatile mbox_t *mbox = adapter->mbox;
+        int     len = 0;
+
+        len = sprintf(page, "Contents of Mail Box Structure\n");
+        len += sprintf(page+len, "  Fw Command   = 0x%02x\n", 
+                        mbox->m_out.cmd);
+        len += sprintf(page+len, "  Cmd Sequence = 0x%02x\n", 
+                        mbox->m_out.cmdid);
+        len += sprintf(page+len, "  No of Sectors= %04d\n", 
+                        mbox->m_out.numsectors);
+        len += sprintf(page+len, "  LBA          = 0x%02x\n", 
+                        mbox->m_out.lba);
+        len += sprintf(page+len, "  DTA          = 0x%08x\n", 
+                        mbox->m_out.xferaddr);
+        len += sprintf(page+len, "  Logical Drive= 0x%02x\n", 
+                        mbox->m_out.logdrv);
+        len += sprintf(page+len, "  No of SG Elmt= 0x%02x\n",
+                        mbox->m_out.numsgelements);
+        len += sprintf(page+len, "  Busy         = %01x\n", 
+                        mbox->m_in.busy);
+        len += sprintf(page+len, "  Status       = 0x%02x\n", 
+                        mbox->m_in.status);
+
+        *eof = 1;
+
+        return len;
+}
+
+
+/**
+ * proc_rebuild_rate()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display current rebuild rate
+ */
+static int
+proc_rebuild_rate(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t       *adapter = (adapter_t *)data;
+        dma_addr_t      dma_handle;
+        caddr_t         inquiry;
+        struct pci_dev  *pdev;
+        int     len = 0;
+
+        if( make_local_pdev(adapter, &pdev) != 0 ) {
+                *eof = 1;
+                return len;
+        }
+
+        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
+                free_local_pdev(pdev);
+                *eof = 1;
+                return len;
+        }
+
+        if( mega_adapinq(adapter, dma_handle) != 0 ) {
+
+                len = sprintf(page, "Adapter inquiry failed.\n");
+
+                printk(KERN_WARNING "megaraid: inquiry failed.\n");
+
+                mega_free_inquiry(inquiry, dma_handle, pdev);
+
+                free_local_pdev(pdev);
+
+                *eof = 1;
+
+                return len;
+        }
+
+        if( adapter->flag & BOARD_40LD ) {
+                len = sprintf(page, "Rebuild Rate: [%d%%]\n",
+                        ((mega_inquiry3 *)inquiry)->rebuild_rate);
+        }
+        else {
+                len = sprintf(page, "Rebuild Rate: [%d%%]\n",
+                        ((mraid_ext_inquiry *)
+                        inquiry)->raid_inq.adapter_info.rebuild_rate);
+        }
+
+
+        mega_free_inquiry(inquiry, dma_handle, pdev);
+
+        free_local_pdev(pdev);
+
+        *eof = 1;
+
+        return len;
+}
+
+
+/**
+ * proc_battery()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display information about the battery module on the controller.
+ */
+static int
+proc_battery(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t       *adapter = (adapter_t *)data;
+        dma_addr_t      dma_handle;
+        caddr_t         inquiry;
+        struct pci_dev  *pdev;
+        u8      battery_status = 0;
+        char    str[256];
+        int     len = 0;
+
+        if( make_local_pdev(adapter, &pdev) != 0 ) {
+                *eof = 1;
+                return len;
+        }
+
+        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
+                free_local_pdev(pdev);
+                *eof = 1;
+                return len;
+        }
+
+        if( mega_adapinq(adapter, dma_handle) != 0 ) {
+
+                len = sprintf(page, "Adapter inquiry failed.\n");
+
+                printk(KERN_WARNING "megaraid: inquiry failed.\n");
+
+                mega_free_inquiry(inquiry, dma_handle, pdev);
+
+                free_local_pdev(pdev);
+
+                *eof = 1;
+
+                return len;
+        }
+
+        if( adapter->flag & BOARD_40LD ) {
+                battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
+        }
+        else {
+                battery_status = ((mraid_ext_inquiry *)inquiry)->
+                        raid_inq.adapter_info.battery_status;
+        }
+
+        /*
+         * Decode the battery status
+         */
+        sprintf(str, "Battery Status:[%d]", battery_status);
+
+        if(battery_status == MEGA_BATT_CHARGE_DONE)
+                strcat(str, " Charge Done");
+
+        if(battery_status & MEGA_BATT_MODULE_MISSING)
+                strcat(str, " Module Missing");
+        
+        if(battery_status & MEGA_BATT_LOW_VOLTAGE)
+                strcat(str, " Low Voltage");
+        
+        if(battery_status & MEGA_BATT_TEMP_HIGH)
+                strcat(str, " Temperature High");
+        
+        if(battery_status & MEGA_BATT_PACK_MISSING)
+                strcat(str, " Pack Missing");
+        
+        if(battery_status & MEGA_BATT_CHARGE_INPROG)
+                strcat(str, " Charge In-progress");
+        
+        if(battery_status & MEGA_BATT_CHARGE_FAIL)
+                strcat(str, " Charge Fail");
+        
+        if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
+                strcat(str, " Cycles Exceeded");
+
+        len = sprintf(page, "%s\n", str);
+
+
+        mega_free_inquiry(inquiry, dma_handle, pdev);
+
+        free_local_pdev(pdev);
+
+        *eof = 1;
+
+        return len;
+}
+
+
+/**
+ * proc_pdrv_ch0()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display information about the physical drives on physical channel 0.
+ */
+static int
+proc_pdrv_ch0(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_pdrv(adapter, page, 0));
+}
+
+
+/**
+ * proc_pdrv_ch1()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display information about the physical drives on physical channel 1.
+ */
+static int
+proc_pdrv_ch1(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_pdrv(adapter, page, 1));
+}
+
+
+/**
+ * proc_pdrv_ch2()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display information about the physical drives on physical channel 2.
+ */
+static int
+proc_pdrv_ch2(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_pdrv(adapter, page, 2));
+}
+
+
+/**
+ * proc_pdrv_ch3()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display information about the physical drives on physical channel 3.
+ */
+static int
+proc_pdrv_ch3(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_pdrv(adapter, page, 3));
+}
+
+
+/**
+ * proc_pdrv()
+ * @page - buffer to write the data in
+ * @adapter - pointer to our soft state
+ *
+ * Display information about the physical drives.
+ */
+static int
+proc_pdrv(adapter_t *adapter, char *page, int channel)
+{
+        dma_addr_t      dma_handle;
+        char            *scsi_inq;
+        dma_addr_t      scsi_inq_dma_handle;
+        caddr_t         inquiry;
+        struct pci_dev  *pdev;
+        u8      *pdrv_state;
+        u8      state;
+        int     tgt;
+        int     max_channels;
+        int     len = 0;
+        char    str[80];
+        int     i;
+
+        if( make_local_pdev(adapter, &pdev) != 0 ) {
+                return len;
+        }
+
+        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
+                goto free_pdev;
+        }
+
+        if( mega_adapinq(adapter, dma_handle) != 0 ) {
+                len = sprintf(page, "Adapter inquiry failed.\n");
+
+                printk(KERN_WARNING "megaraid: inquiry failed.\n");
+
+                goto free_inquiry;
+        }
+
+
+        scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
+
+        if( scsi_inq == NULL ) {
+                len = sprintf(page, "memory not available for scsi inq.\n");
+
+                goto free_inquiry;
+        }
+
+        if( adapter->flag & BOARD_40LD ) {
+                pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
+        }
+        else {
+                pdrv_state = ((mraid_ext_inquiry *)inquiry)->
+                        raid_inq.pdrv_info.pdrv_state;
+        }
+
+        max_channels = adapter->product_info.nchannels;
+
+        if( channel >= max_channels ) {
+                goto free_pci;
+        }
+
+        for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
+
+                i = channel*16 + tgt;
+
+                state = *(pdrv_state + i);
+
+                switch( state & 0x0F ) {
+
+                case PDRV_ONLINE:
+                        sprintf(str,
+                        "Channel:%2d Id:%2d State: Online",
+                                channel, tgt);
+                        break;
+
+                case PDRV_FAILED:
+                        sprintf(str,
+                        "Channel:%2d Id:%2d State: Failed",
+                                channel, tgt);
+                        break;
+
+                case PDRV_RBLD:
+                        sprintf(str,
+                        "Channel:%2d Id:%2d State: Rebuild",
+                                channel, tgt);
+                        break;
+
+                case PDRV_HOTSPARE:
+                        sprintf(str,
+                        "Channel:%2d Id:%2d State: Hot spare",
+                                channel, tgt);
+                        break;
+
+                default:
+                        sprintf(str,
+                        "Channel:%2d Id:%2d State: Un-configured",
+                                channel, tgt);
+                        break;
+
+                }
+
+                /*
+                 * This interface displays inquiries for disk drives
+                 * only. Inquries for logical drives and non-disk
+                 * devices are available through /proc/scsi/scsi
+                 */
+                memset(scsi_inq, 0, 256);
+                if( mega_internal_dev_inquiry(adapter, channel, tgt,
+                                scsi_inq_dma_handle) ||
+                                (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
+                        continue;
+                }
+
+                /*
+                 * Check for overflow. We print less than 240
+                 * characters for inquiry
+                 */
+                if( (len + 240) >= PAGE_SIZE ) break;
+
+                len += sprintf(page+len, "%s.\n", str);
+
+                len += mega_print_inquiry(page+len, scsi_inq);
+        }
+
+free_pci:
+        pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
+free_inquiry:
+        mega_free_inquiry(inquiry, dma_handle, pdev);
+free_pdev:
+        free_local_pdev(pdev);
+
+        return len;
+}
+
+
+/*
+ * Display scsi inquiry
+ */
+static int
+mega_print_inquiry(char *page, char *scsi_inq)
+{
+        int     len = 0;
+        int     i;
+
+        len = sprintf(page, "  Vendor: ");
+        for( i = 8; i < 16; i++ ) {
+                len += sprintf(page+len, "%c", scsi_inq[i]);
+        }
+
+        len += sprintf(page+len, "  Model: ");
+
+        for( i = 16; i < 32; i++ ) {
+                len += sprintf(page+len, "%c", scsi_inq[i]);
+        }
+
+        len += sprintf(page+len, "  Rev: ");
+
+        for( i = 32; i < 36; i++ ) {
+                len += sprintf(page+len, "%c", scsi_inq[i]);
+        }
+
+        len += sprintf(page+len, "\n");
+
+        i = scsi_inq[0] & 0x1f;
+
+        len += sprintf(page+len, "  Type:   %s ",
+                i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] :
+                   "Unknown          ");
+
+        len += sprintf(page+len,
+        "                 ANSI SCSI revision: %02x", scsi_inq[2] & 0x07);
+
+        if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
+                len += sprintf(page+len, " CCS\n");
+        else
+                len += sprintf(page+len, "\n");
+
+        return len;
+}
+
+
+/**
+ * proc_rdrv_10()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_rdrv_10(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_rdrv(adapter, page, 0, 9));
+}
+
+
+/**
+ * proc_rdrv_20()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_rdrv_20(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_rdrv(adapter, page, 10, 19));
+}
+
+
+/**
+ * proc_rdrv_30()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_rdrv_30(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_rdrv(adapter, page, 20, 29));
+}
+
+
+/**
+ * proc_rdrv_40()
+ * @page - buffer to write the data in
+ * @start - where the actual data has been written in page
+ * @offset - same meaning as the read system call
+ * @count - same meaning as the read system call
+ * @eof - set if no more data needs to be returned
+ * @data - pointer to our soft state
+ *
+ * Display real time information about the logical drives 0 through 9.
+ */
+static int
+proc_rdrv_40(char *page, char **start, off_t offset, int count, int *eof,
+                void *data)
+{
+        adapter_t *adapter = (adapter_t *)data;
+
+        *eof = 1;
+
+        return (proc_rdrv(adapter, page, 30, 39));
+}
+
+
+/**
+ * proc_rdrv()
+ * @page - buffer to write the data in
+ * @adapter - pointer to our soft state
+ * @start - starting logical drive to display
+ * @end - ending logical drive to display
+ *
+ * We do not print the inquiry information since its already available through
+ * /proc/scsi/scsi interface
+ */
+static int
+proc_rdrv(adapter_t *adapter, char *page, int start, int end )
+{
+        dma_addr_t      dma_handle;
+        logdrv_param    *lparam;
+        megacmd_t       mc;
+        char            *disk_array;
+        dma_addr_t      disk_array_dma_handle;
+        caddr_t         inquiry;
+        struct pci_dev  *pdev;
+        u8      *rdrv_state;
+        int     num_ldrv;
+        u32     array_sz;
+        int     len = 0;
+        int     i;
+
+        if( make_local_pdev(adapter, &pdev) != 0 ) {
+                return len;
+        }
+
+        if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
+                free_local_pdev(pdev);
+                return len;
+        }
+
+        if( mega_adapinq(adapter, dma_handle) != 0 ) {
+
+                len = sprintf(page, "Adapter inquiry failed.\n");
+
+                printk(KERN_WARNING "megaraid: inquiry failed.\n");
+
+                mega_free_inquiry(inquiry, dma_handle, pdev);
+
+                free_local_pdev(pdev);
+
+                return len;
+        }
+
+        memset(&mc, 0, sizeof(megacmd_t));
+
+        if( adapter->flag & BOARD_40LD ) {
+                array_sz = sizeof(disk_array_40ld);
+
+                rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
+
+                num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
+        }
+        else {
+                array_sz = sizeof(disk_array_8ld);
+
+                rdrv_state = ((mraid_ext_inquiry *)inquiry)->
+                        raid_inq.logdrv_info.ldrv_state;
+
+                num_ldrv = ((mraid_ext_inquiry *)inquiry)->
+                        raid_inq.logdrv_info.num_ldrv;
+        }
+
+        disk_array = pci_alloc_consistent(pdev, array_sz,
+                        &disk_array_dma_handle);
+
+        if( disk_array == NULL ) {
+                len = sprintf(page, "memory not available.\n");
+
+                mega_free_inquiry(inquiry, dma_handle, pdev);
+
+                free_local_pdev(pdev);
+
+                return len;
+        }
+
+        mc.xferaddr = (u32)disk_array_dma_handle;
+
+        if( adapter->flag & BOARD_40LD ) {
+                mc.cmd = FC_NEW_CONFIG;
+                mc.opcode = OP_DCMD_READ_CONFIG;
+
+                if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) ) {
+
+                        len = sprintf(page, "40LD read config failed.\n");
+
+                        mega_free_inquiry(inquiry, dma_handle, pdev);
+
+                        pci_free_consistent(pdev, array_sz, disk_array,
+                                        disk_array_dma_handle);
+
+                        free_local_pdev(pdev);
+
+                        return len;
+                }
+
+        }
+        else {
+                mc.cmd = NEW_READ_CONFIG_8LD;
+
+                if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) ) {
+
+                        mc.cmd = READ_CONFIG_8LD;
+
+                        if( mega_internal_command(adapter, LOCK_INT, &mc,
+                                                NULL) ){
+
+                                len = sprintf(page,
+                                        "8LD read config failed.\n");
+
+                                mega_free_inquiry(inquiry, dma_handle, pdev);
+
+                                pci_free_consistent(pdev, array_sz,
+                                                disk_array,
+                                                disk_array_dma_handle);
+
+                                free_local_pdev(pdev);
+
+                                return len;
+                        }
+                }
+        }
+
+        for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
+
+                if( adapter->flag & BOARD_40LD ) {
+                        lparam =
+                        &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
+                }
+                else {
+                        lparam =
+                        &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
+                }
+
+                /*
+                 * Check for overflow. We print less than 240 characters for
+                 * information about each logical drive.
+                 */
+                if( (len + 240) >= PAGE_SIZE ) break;
+
+                len += sprintf(page+len, "Logical drive:%2d:, ", i);
+
+                switch( rdrv_state[i] & 0x0F ) {
+                case RDRV_OFFLINE:
+                        len += sprintf(page+len, "state: offline");
+                        break;
+
+                case RDRV_DEGRADED:
+                        len += sprintf(page+len, "state: degraded");
+                        break;
+
+                case RDRV_OPTIMAL:
+                        len += sprintf(page+len, "state: optimal");
+                        break;
+
+                case RDRV_DELETED:
+                        len += sprintf(page+len, "state: deleted");
+                        break;
+
+                default:
+                        len += sprintf(page+len, "state: unknown");
+                        break;
+                }
+
+                /*
+                 * Check if check consistency or initialization is going on
+                 * for this logical drive.
+                 */
+                if( (rdrv_state[i] & 0xF0) == 0x20 ) {
+                        len += sprintf(page+len,
+                                        ", check-consistency in progress");
+                }
+                else if( (rdrv_state[i] & 0xF0) == 0x10 ) {
+                        len += sprintf(page+len,
+                                        ", initialization in progress");
+                }
+                
+                len += sprintf(page+len, "\n");
+
+                len += sprintf(page+len, "Span depth:%3d, ",
+                                lparam->span_depth);
+
+                len += sprintf(page+len, "RAID level:%3d, ",
+                                lparam->level);
+
+                len += sprintf(page+len, "Stripe size:%3d, ",
+                                lparam->stripe_sz ? lparam->stripe_sz/2: 128);
+
+                len += sprintf(page+len, "Row size:%3d\n",
+                                lparam->row_size);
+
+
+                len += sprintf(page+len, "Read Policy: ");
+
+                switch(lparam->read_ahead) {
+
+                case NO_READ_AHEAD:
+                        len += sprintf(page+len, "No read ahead, ");
+                        break;
+
+                case READ_AHEAD:
+                        len += sprintf(page+len, "Read ahead, ");
+                        break;
+
+                case ADAP_READ_AHEAD:
+                        len += sprintf(page+len, "Adaptive, ");
+                        break;
+
+                }
+
+                len += sprintf(page+len, "Write Policy: ");
+
+                switch(lparam->write_mode) {
+
+                case WRMODE_WRITE_THRU:
+                        len += sprintf(page+len, "Write thru, ");
+                        break;
+
+                case WRMODE_WRITE_BACK:
+                        len += sprintf(page+len, "Write back, ");
+                        break;
+                }
+
+                len += sprintf(page+len, "Cache Policy: ");
+
+                switch(lparam->direct_io) {
+
+                case CACHED_IO:
+                        len += sprintf(page+len, "Cached IO\n\n");
+                        break;
+
+                case DIRECT_IO:
+                        len += sprintf(page+len, "Direct IO\n\n");
+                        break;
+                }
+        }
+
+        mega_free_inquiry(inquiry, dma_handle, pdev);
+
+        pci_free_consistent(pdev, array_sz, disk_array,
+                        disk_array_dma_handle);
+
+        free_local_pdev(pdev);
+
+        return len;
+}
+
+#endif
+
+
+/**
+ * megaraid_biosparam()
+ *
+ * Return the disk geometry for a particular disk
+ */
+static int
+megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
+                    sector_t capacity, int geom[])
+{
+        adapter_t       *adapter;
+        unsigned char   *bh;
+        int     heads;
+        int     sectors;
+        int     cylinders;
+        int     rval;
+
+        /* Get pointer to host config structure */
+        adapter = (adapter_t *)sdev->host->hostdata;
+
+        if (IS_RAID_CH(adapter, sdev->channel)) {
+                        /* Default heads (64) & sectors (32) */
+                        heads = 64;
+                        sectors = 32;
+                        cylinders = (ulong)capacity / (heads * sectors);
+
+                        /*
+                         * Handle extended translation size for logical drives
+                         * > 1Gb
+                         */
+                        if ((ulong)capacity >= 0x200000) {
+                                heads = 255;
+                                sectors = 63;
+                                cylinders = (ulong)capacity / (heads * sectors);
+                        }
+
+                        /* return result */
+                        geom[0] = heads;
+                        geom[1] = sectors;
+                        geom[2] = cylinders;
+        }
+        else {
+                bh = scsi_bios_ptable(bdev);
+
+                if( bh ) {
+                        rval = scsi_partsize(bh, capacity,
+                                            &geom[2], &geom[0], &geom[1]);
+                        kfree(bh);
+                        if( rval != -1 )
+                                return rval;
+                }
+
+                printk(KERN_INFO
+                "megaraid: invalid partition on this disk on channel %d\n",
+                                sdev->channel);
+
+                /* Default heads (64) & sectors (32) */
+                heads = 64;
+                sectors = 32;
+                cylinders = (ulong)capacity / (heads * sectors);
+
+                /* Handle extended translation size for logical drives > 1Gb */
+                if ((ulong)capacity >= 0x200000) {
+                        heads = 255;
+                        sectors = 63;
+                        cylinders = (ulong)capacity / (heads * sectors);
+                }
+
+                /* return result */
+                geom[0] = heads;
+                geom[1] = sectors;
+                geom[2] = cylinders;
+        }
+
+        return 0;
+}
+
+/**
+ * mega_init_scb()
+ * @adapter - pointer to our soft state
+ *
+ * Allocate memory for the various pointers in the scb structures:
+ * scatter-gather list pointer, passthru and extended passthru structure
+ * pointers.
+ */
+static int
+mega_init_scb(adapter_t *adapter)
+{
+        scb_t   *scb;
+        int     i;
+
+        for( i = 0; i < adapter->max_cmds; i++ ) {
+
+                scb = &adapter->scb_list[i];
+
+                scb->sgl64 = NULL;
+                scb->sgl = NULL;
+                scb->pthru = NULL;
+                scb->epthru = NULL;
+        }
+
+        for( i = 0; i < adapter->max_cmds; i++ ) {
+
+                scb = &adapter->scb_list[i];
+
+                scb->idx = i;
+
+                scb->sgl64 = pci_alloc_consistent(adapter->dev,
+                                sizeof(mega_sgl64) * adapter->sglen,
+                                &scb->sgl_dma_addr);
+
+                scb->sgl = (mega_sglist *)scb->sgl64;
+
+                if( !scb->sgl ) {
+                        printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
+                        mega_free_sgl(adapter);
+                        return -1;
+                }
+
+                scb->pthru = pci_alloc_consistent(adapter->dev,
+                                sizeof(mega_passthru),
+                                &scb->pthru_dma_addr);
+
+                if( !scb->pthru ) {
+                        printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
+                        mega_free_sgl(adapter);
+                        return -1;
+                }
+
+                scb->epthru = pci_alloc_consistent(adapter->dev,
+                                sizeof(mega_ext_passthru),
+                                &scb->epthru_dma_addr);
+
+                if( !scb->epthru ) {
+                        printk(KERN_WARNING
+                                "Can't allocate extended passthru.\n");
+                        mega_free_sgl(adapter);
+                        return -1;
+                }
+
+
+                scb->dma_type = MEGA_DMA_TYPE_NONE;
+
+                /*
+                 * Link to free list
+                 * lock not required since we are loading the driver, so no
+                 * commands possible right now.
+                 */
+                scb->state = SCB_FREE;
+                scb->cmd = NULL;
+                list_add(&scb->list, &adapter->free_list);
+        }
+
+        return 0;
+}
+
+
+/**
+ * megadev_open()
+ * @inode - unused
+ * @filep - unused
+ *
+ * Routines for the character/ioctl interface to the driver. Find out if this
+ * is a valid open. If yes, increment the module use count so that it cannot
+ * be unloaded.
+ */
+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 inode *inode, struct file *filep, unsigned int cmd,
+                unsigned long arg)
+{
+        adapter_t       *adapter;
+        nitioctl_t      uioc;
+        int             adapno;
+        int             rval;
+        mega_passthru   __user *upthru; /* user address for passthru */
+        mega_passthru   *pthru;         /* copy user passthru here */
+        dma_addr_t      pthru_dma_hndl;
+        void            *data = NULL;   /* data to be transferred */
+        dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
+        megacmd_t       mc;
+        megastat_t      __user *ustats;
+        int             num_ldrv;
+        u32             uxferaddr = 0;
+        struct pci_dev  *pdev;
+
+        ustats = NULL; /* avoid compilation warnings */
+        num_ldrv = 0;
+
+        /*
+         * Make sure only USCSICMD are issued through this interface.
+         * MIMD application would still fire different command.
+         */
+        if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
+                return -EINVAL;
+        }
+
+        /*
+         * Check and convert a possible MIMD command to NIT command.
+         * mega_m_to_n() copies the data from the user space, so we do not
+         * have to do it here.
+         * NOTE: We will need some user address to copyout the data, therefore
+         * the inteface layer will also provide us with the required user
+         * addresses.
+         */
+        memset(&uioc, 0, sizeof(nitioctl_t));
+        if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
+                return rval;
+
+
+        switch( uioc.opcode ) {
+
+        case GET_DRIVER_VER:
+                if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
+                        return (-EFAULT);
+
+                break;
+
+        case GET_N_ADAP:
+                if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
+                        return (-EFAULT);
+
+                /*
+                 * Shucks. MIMD interface returns a positive value for number
+                 * of adapters. TODO: Change it to return 0 when there is no
+                 * applicatio using mimd interface.
+                 */
+                return hba_count;
+
+        case GET_ADAP_INFO:
+
+                /*
+                 * Which adapter
+                 */
+                if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
+                        return (-ENODEV);
+
+                if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
+                                sizeof(struct mcontroller)) )
+                        return (-EFAULT);
+                break;
+
+#if MEGA_HAVE_STATS
+
+        case GET_STATS:
+                /*
+                 * Which adapter
+                 */
+                if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
+                        return (-ENODEV);
+
+                adapter = hba_soft_state[adapno];
+
+                ustats = uioc.uioc_uaddr;
+
+                if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
+                        return (-EFAULT);
+
+                /*
+                 * Check for the validity of the logical drive number
+                 */
+                if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
+
+                if( copy_to_user(ustats->nreads, adapter->nreads,
+                                        num_ldrv*sizeof(u32)) )
+                        return -EFAULT;
+
+                if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
+                                        num_ldrv*sizeof(u32)) )
+                        return -EFAULT;
+
+                if( copy_to_user(ustats->nwrites, adapter->nwrites,
+                                        num_ldrv*sizeof(u32)) )
+                        return -EFAULT;
+
+                if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
+                                        num_ldrv*sizeof(u32)) )
+                        return -EFAULT;
+
+                if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
+                                        num_ldrv*sizeof(u32)) )
+                        return -EFAULT;
+
+                if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
+                                        num_ldrv*sizeof(u32)) )
+                        return -EFAULT;
+
+                return 0;
+
+#endif
+        case MBOX_CMD:
+
+                /*
+                 * Which adapter
+                 */
+                if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
+                        return (-ENODEV);
+
+                adapter = hba_soft_state[adapno];
+
+                /*
+                 * Deletion of logical drive is a special case. The adapter
+                 * should be quiescent before this command is issued.
+                 */
+                if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
+                                uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
+
+                        /*
+                         * Do we support this feature
+                         */
+                        if( !adapter->support_random_del ) {
+                                printk(KERN_WARNING "megaraid: logdrv ");
+                                printk("delete on non-supporting F/W.\n");
+
+                                return (-EINVAL);
+                        }
+
+                        rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
+
+                        if( rval == 0 ) {
+                                memset(&mc, 0, sizeof(megacmd_t));
+
+                                mc.status = rval;
+
+                                rval = mega_n_to_m((void __user *)arg, &mc);
+                        }
+
+                        return rval;
+                }
+                /*
+                 * This interface only support the regular passthru commands.
+                 * Reject extended passthru and 64-bit passthru
+                 */
+                if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
+                        uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
+
+                        printk(KERN_WARNING "megaraid: rejected passthru.\n");
+
+                        return (-EINVAL);
+                }
+
+                /*
+                 * For all internal commands, the buffer must be allocated in
+                 * <4GB address range
+                 */
+                if( make_local_pdev(adapter, &pdev) != 0 )
+                        return -EIO;
+
+                /* Is it a passthru command or a DCMD */
+                if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
+                        /* Passthru commands */
+
+                        pthru = pci_alloc_consistent(pdev,
+                                        sizeof(mega_passthru),
+                                        &pthru_dma_hndl);
+
+                        if( pthru == NULL ) {
+                                free_local_pdev(pdev);
+                                return (-ENOMEM);
+                        }
+
+                        /*
+                         * The user passthru structure
+                         */
+                        upthru = (mega_passthru __user *)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 *)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, LOCK_INT, &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 *)uxferaddr, data,
+                                                        pthru->dataxferlen) ) {
+                                        rval = (-EFAULT);
+                                }
+                        }
+
+                        /*
+                         * Send the request sense data also, irrespective of
+                         * whether the user has asked for it or not.
+                         */
+                        copy_to_user(upthru->reqsensearea,
+                                        pthru->reqsensearea, 14);
+
+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 *)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, LOCK_INT, &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 *)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;
+}
+
+/**
+ * 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
+         * begining of the structure.
+         */
+
+        if( copy_from_user(signature, arg, 7) )
+                return (-EFAULT);
+
+        if( memcmp(signature, "MEGANIT", 7) == 0 ) {
+
+                /*
+                 * NOTE NOTE: The nit ioctl is still under flux because of
+                 * change of mailbox definition, in HPE. No applications yet
+                 * use this interface and let's not have applications use this
+                 * interface till the new specifitions are in place.
+                 */
+                return -EINVAL;
+#if 0
+                if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
+                        return (-EFAULT);
+                return 0;
+#endif
+        }
+
+        /*
+         * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
+         *
+         * Get the user ioctl structure
+         */
+        if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
+                return (-EFAULT);
+
+
+        /*
+         * Get the opcode and subopcode for the commands
+         */
+        opcode = uioc_mimd.ui.fcs.opcode;
+        subopcode = uioc_mimd.ui.fcs.subopcode;
+
+        switch (opcode) {
+        case 0x82:
+
+                switch (subopcode) {
+
+                case MEGAIOC_QDRVRVER:  /* Query driver version */
+                        uioc->opcode = GET_DRIVER_VER;
+                        uioc->uioc_uaddr = uioc_mimd.data;
+                        break;
+
+                case MEGAIOC_QNADAP:    /* Get # of adapters */
+                        uioc->opcode = GET_N_ADAP;
+                        uioc->uioc_uaddr = uioc_mimd.data;
+                        break;
+
+                case MEGAIOC_QADAPINFO: /* Get adapter information */
+                        uioc->opcode = GET_ADAP_INFO;
+                        uioc->adapno = uioc_mimd.ui.fcs.adapno;
+                        uioc->uioc_uaddr = uioc_mimd.data;
+                        break;
+
+                default:
+                        return(-EINVAL);
+                }
+
+                break;
+
+
+        case 0x81:
+
+                uioc->opcode = MBOX_CMD;
+                uioc->adapno = uioc_mimd.ui.fcs.adapno;
+
+                memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
+
+                uioc->xferlen = uioc_mimd.ui.fcs.length;
+
+                if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
+                if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
+
+                break;
+
+        case 0x80:
+
+                uioc->opcode = MBOX_CMD;
+                uioc->adapno = uioc_mimd.ui.fcs.adapno;
+
+                memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
+
+                /*
+                 * Choose the xferlen bigger of input and output data
+                 */
+                uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
+                        uioc_mimd.outlen : uioc_mimd.inlen;
+
+                if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
+                if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
+
+                break;
+
+        default:
+                return (-EINVAL);
+
+        }
+
+        return 0;
+}
+
+/*
+ * mega_n_to_m()
+ * @arg - user address
+ * @mc - mailbox command
+ *
+ * Updates the status information to the application, depending on application
+ * conforms to older mimd ioctl interface or newer NIT ioctl interface
+ */
+static int
+mega_n_to_m(void __user *arg, megacmd_t *mc)
+{
+        nitioctl_t      __user *uiocp;
+        megacmd_t       __user *umc;
+        mega_passthru   __user *upthru;
+        struct uioctl_t __user *uioc_mimd;
+        char    signature[8] = {0};
+
+        /*
+         * check is the application conforms to NIT.
+         */
+        if( copy_from_user(signature, arg, 7) )
+                return -EFAULT;
+
+        if( memcmp(signature, "MEGANIT", 7) == 0 ) {
+
+                uiocp = arg;
+
+                if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
+                        return (-EFAULT);
+
+                if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
+
+                        umc = MBOX_P(uiocp);
+
+                        if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
+                                return -EFAULT;
+
+                        if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
+                                return (-EFAULT);
+                }
+        }
+        else {
+                uioc_mimd = arg;
+
+                if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
+                        return (-EFAULT);
+
+                if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
+
+                        umc = (megacmd_t __user *)uioc_mimd->mbox;
+
+                        if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
+                                return (-EFAULT);
+
+                        if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
+                                return (-EFAULT);
+                }
+        }
+
+        return 0;
+}
+
+
+/*
+ * MEGARAID 'FW' commands.
+ */
+
+/**
+ * mega_is_bios_enabled()
+ * @adapter - pointer to our soft state
+ *
+ * issue command to find out if the BIOS is enabled for this controller
+ */
+static int
+mega_is_bios_enabled(adapter_t *adapter)
+{
+        unsigned char   raw_mbox[sizeof(struct mbox_out)];
+        mbox_t  *mbox;
+        int     ret;
+
+        mbox = (mbox_t *)raw_mbox;
+
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+        raw_mbox[0] = IS_BIOS_ENABLED;
+        raw_mbox[2] = GET_BIOS;
+
+
+        ret = issue_scb_block(adapter, raw_mbox);
+
+        return *(char *)adapter->mega_buffer;
+}
+
+
+/**
+ * mega_enum_raid_scsi()
+ * @adapter - pointer to our soft state
+ *
+ * Find out what channels are RAID/SCSI. This information is used to
+ * differentiate the virtual channels and physical channels and to support
+ * ROMB feature and non-disk devices.
+ */
+static void
+mega_enum_raid_scsi(adapter_t *adapter)
+{
+        unsigned char raw_mbox[sizeof(struct mbox_out)];
+        mbox_t *mbox;
+        int i;
+
+        mbox = (mbox_t *)raw_mbox;
+
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+        /*
+         * issue command to find out what channels are raid/scsi
+         */
+        raw_mbox[0] = CHNL_CLASS;
+        raw_mbox[2] = GET_CHNL_CLASS;
+
+        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+        /*
+         * Non-ROMB firmware fail this command, so all channels
+         * must be shown RAID
+         */
+        adapter->mega_ch_class = 0xFF;
+
+        if(!issue_scb_block(adapter, raw_mbox)) {
+                adapter->mega_ch_class = *((char *)adapter->mega_buffer);
+
+        }
+
+        for( i = 0; i < adapter->product_info.nchannels; i++ ) { 
+                if( (adapter->mega_ch_class >> i) & 0x01 ) {
+                        printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
+                                        i);
+                }
+                else {
+                        printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
+                                        i);
+                }
+        }
+
+        return;
+}
+
+
+/**
+ * mega_get_boot_drv()
+ * @adapter - pointer to our soft state
+ *
+ * Find out which device is the boot device. Note, any logical drive or any
+ * phyical device (e.g., a CDROM) can be designated as a boot device.
+ */
+static void
+mega_get_boot_drv(adapter_t *adapter)
+{
+        struct private_bios_data        *prv_bios_data;
+        unsigned char   raw_mbox[sizeof(struct mbox_out)];
+        mbox_t  *mbox;
+        u16     cksum = 0;
+        u8      *cksum_p;
+        u8      boot_pdrv;
+        int     i;
+
+        mbox = (mbox_t *)raw_mbox;
+
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+        raw_mbox[0] = BIOS_PVT_DATA;
+        raw_mbox[2] = GET_BIOS_PVT_DATA;
+
+        memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
+
+        mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
+
+        adapter->boot_ldrv_enabled = 0;
+        adapter->boot_ldrv = 0;
+
+        adapter->boot_pdrv_enabled = 0;
+        adapter->boot_pdrv_ch = 0;
+        adapter->boot_pdrv_tgt = 0;
+
+        if(issue_scb_block(adapter, raw_mbox) == 0) {
+                prv_bios_data =
+                        (struct private_bios_data *)adapter->mega_buffer;
+
+                cksum = 0;
+                cksum_p = (char *)prv_bios_data;
+                for (i = 0; i < 14; i++ ) {
+                        cksum += (u16)(*cksum_p++);
+                }
+
+                if (prv_bios_data->cksum == (u16)(0-cksum) ) {
+
+                        /*
+                         * If MSB is set, a physical drive is set as boot
+                         * device
+                         */
+                        if( prv_bios_data->boot_drv & 0x80 ) {
+                                adapter->boot_pdrv_enabled = 1;
+                                boot_pdrv = prv_bios_data->boot_drv & 0x7F;
+                                adapter->boot_pdrv_ch = boot_pdrv / 16;
+                                adapter->boot_pdrv_tgt = boot_pdrv % 16;
+                        }
+                        else {
+                                adapter->boot_ldrv_enabled = 1;
+                                adapter->boot_ldrv = prv_bios_data->boot_drv;
+                        }
+                }
+        }
+
+}
+
+/**
+ * mega_support_random_del()
+ * @adapter - pointer to our soft state
+ *
+ * Find out if this controller supports random deletion and addition of
+ * logical drives
+ */
+static int
+mega_support_random_del(adapter_t *adapter)
+{
+        unsigned char raw_mbox[sizeof(struct mbox_out)];
+        mbox_t *mbox;
+        int rval;
+
+        mbox = (mbox_t *)raw_mbox;
+
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+
+        /*
+         * issue command
+         */
+        raw_mbox[0] = FC_DEL_LOGDRV;
+        raw_mbox[2] = OP_SUP_DEL_LOGDRV;
+
+        rval = issue_scb_block(adapter, raw_mbox);
+
+        return !rval;
+}
+
+
+/**
+ * mega_support_ext_cdb()
+ * @adapter - pointer to our soft state
+ *
+ * Find out if this firmware support cdblen > 10
+ */
+static int
+mega_support_ext_cdb(adapter_t *adapter)
+{
+        unsigned char raw_mbox[sizeof(struct mbox_out)];
+        mbox_t *mbox;
+        int rval;
+
+        mbox = (mbox_t *)raw_mbox;
+
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+        /*
+         * issue command to find out if controller supports extended CDBs.
+         */
+        raw_mbox[0] = 0xA4;
+        raw_mbox[2] = 0x16;
+
+        rval = issue_scb_block(adapter, raw_mbox);
+
+        return !rval;
+}
+
+
+/**
+ * mega_del_logdrv()
+ * @adapter - pointer to our soft state
+ * @logdrv - logical drive to be deleted
+ *
+ * Delete the specified logical drive. It is the responsibility of the user
+ * app to let the OS know about this operation.
+ */
+static int
+mega_del_logdrv(adapter_t *adapter, int logdrv)
+{
+        unsigned long flags;
+        scb_t *scb;
+        int rval;
+
+        /*
+         * Stop sending commands to the controller, queue them internally.
+         * When deletion is complete, ISR will flush the queue.
+         */
+        atomic_set(&adapter->quiescent, 1);
+
+        /*
+         * Wait till all the issued commands are complete and there are no
+         * commands in the pending queue
+         */
+        while (atomic_read(&adapter->pend_cmds) > 0 ||
+               !list_empty(&adapter->pending_list))
+                msleep(1000);   /* sleep for 1s */
+
+        rval = mega_do_del_logdrv(adapter, logdrv);
+
+        spin_lock_irqsave(&adapter->lock, flags);
+
+        /*
+         * If delete operation was successful, add 0x80 to the logical drive
+         * ids for commands in the pending queue.
+         */
+        if (adapter->read_ldidmap) {
+                struct list_head *pos;
+                list_for_each(pos, &adapter->pending_list) {
+                        scb = list_entry(pos, scb_t, list);
+                        if (scb->pthru->logdrv < 0x80 )
+                                scb->pthru->logdrv += 0x80;
+                }
+        }
+
+        atomic_set(&adapter->quiescent, 0);
+
+        mega_runpendq(adapter);
+
+        spin_unlock_irqrestore(&adapter->lock, flags);
+
+        return rval;
+}
+
+
+static int
+mega_do_del_logdrv(adapter_t *adapter, int logdrv)
+{
+        megacmd_t       mc;
+        int     rval;
+
+        memset( &mc, 0, sizeof(megacmd_t));
+
+        mc.cmd = FC_DEL_LOGDRV;
+        mc.opcode = OP_DEL_LOGDRV;
+        mc.subopcode = logdrv;
+
+        rval = mega_internal_command(adapter, LOCK_INT, &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;
+}
+
+
+/**
+ * mega_adapinq()
+ * @adapter - pointer to our soft state
+ * @dma_handle - DMA address of the buffer
+ *
+ * Issue internal comamnds 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, LOCK_INT, &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, LOCK_INT, &mc, pthru);
+
+        pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
+                        pthru_dma_handle);
+
+        free_local_pdev(pdev);
+
+        return rval;
+}
+
+
+/**
+ * mega_internal_command()
+ * @adapter - pointer to our soft state
+ * @ls - the scope of the exclusion lock.
+ * @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
+ *
+ * lockscope specifies whether the caller has already acquired the lock. Of
+ * course, the caller must know which lock we are talking about.
+ *
+ * Note: parameter 'pthru' is null for non-passthru commands.
+ */
+static int
+mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc,
+                mega_passthru *pthru )
+{
+        Scsi_Cmnd       *scmd;
+        struct  scsi_device *sdev;
+        unsigned long   flags = 0;
+        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.
+         */
+        down(&adapter->int_mtx);
+
+        scb = &adapter->int_scb;
+        memset(scb, 0, sizeof(scb_t));
+
+        scmd = &adapter->int_scmd;
+        memset(scmd, 0, sizeof(Scsi_Cmnd));
+
+        sdev = kmalloc(sizeof(struct scsi_device), GFP_KERNEL);
+        memset(sdev, 0, sizeof(struct scsi_device));
+        scmd->device = sdev;
+
+        scmd->device->host = adapter->host;
+        scmd->buffer = (void *)scb;
+        scmd->cmnd[0] = MEGA_INTERNAL_CMD;
+
+        scb->state |= SCB_ACTIVE;
+        scb->cmd = scmd;
+
+        memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
+
+        /*
+         * Is it a passthru command
+         */
+        if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
+
+                scb->pthru = pthru;
+        }
+
+        scb->idx = CMDID_INT_CMDS;
+
+        scmd->state = 0;
+
+        /*
+         * Get the lock only if the caller has not acquired it already
+         */
+        if( ls == LOCK_INT ) spin_lock_irqsave(&adapter->lock, flags);
+
+        megaraid_queue(scmd, mega_internal_done);
+
+        if( ls == LOCK_INT ) spin_unlock_irqrestore(&adapter->lock, flags);
+
+        /*
+         * Wait till this command finishes. Do not use
+         * wait_event_interruptible(). It causes panic if CTRL-C is hit when
+         * dumping e.g., physical disk information through /proc interface.
+         */
+#if 0
+        wait_event_interruptible(adapter->int_waitq, scmd->state);
+#endif
+        wait_event(adapter->int_waitq, scmd->state);
+
+        rval = scmd->result;
+        mc->status = scmd->result;
+        kfree(sdev);
+
+        /*
+         * Print a debug message for all failed commands. Applications can use
+         * this information.
+         */
+        if( scmd->result && trace_level ) {
+                printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
+                        mc->cmd, mc->opcode, mc->subopcode, scmd->result);
+        }
+
+        up(&adapter->int_mtx);
+
+        return rval;
+}
+
+
+/**
+ * mega_internal_done()
+ * @scmd - internal scsi command
+ *
+ * Callback routine for internal commands.
+ */
+static void
+mega_internal_done(Scsi_Cmnd *scmd)
+{
+        adapter_t       *adapter;
+
+        adapter = (adapter_t *)scmd->device->host->hostdata;
+
+        scmd->state = 1; /* thread waiting for its command to complete */
+
+        /*
+         * See comment in mega_internal_command() routine for
+         * wait_event_interruptible()
+         */
+#if 0
+        wake_up_interruptible(&adapter->int_waitq);
+#endif
+        wake_up(&adapter->int_waitq);
+
+}
+
+
+static struct scsi_host_template megaraid_template = {
+        .module                         = THIS_MODULE,
+        .name                           = "MegaRAID",
+        .proc_name                      = "megaraid",
+        .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,
+};
+
+static int __devinit
+megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+        struct Scsi_Host *host;
+        adapter_t *adapter;
+        unsigned long mega_baseport, tbase, flag = 0;
+        u16 subsysid, subsysvid;
+        u8 pci_bus, pci_dev_func;
+        int irq, i, j;
+        int error = -ENODEV;
+
+        if (pci_enable_device(pdev))
+                goto out;
+        pci_set_master(pdev);
+
+        pci_bus = pdev->bus->number;
+        pci_dev_func = pdev->devfn;
+
+        /*
+         * The megaraid3 stuff reports the ID of the Intel part which is not
+         * remotely specific to the megaraid
+         */
+        if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
+                u16 magic;
+                /*
+                 * Don't fall over the Compaq management cards using the same
+                 * PCI identifier
+                 */
+                if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
+                    pdev->subsystem_device == 0xC000)
+                        return -ENODEV;
+                /* Now check the magic signature byte */
+                pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
+                if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
+                        return -ENODEV;
+                /* Ok it is probably a megaraid */
+        }
+
+        /*
+         * For these vendor and device ids, signature offsets are not
+         * valid and 64 bit is implicit
+         */
+        if (id->driver_data & BOARD_64BIT)
+                flag |= BOARD_64BIT;
+        else {
+                u32 magic64;
+
+                pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
+                if (magic64 == HBA_SIGNATURE_64BIT)
+                        flag |= BOARD_64BIT;
+        }
+
+        subsysvid = pdev->subsystem_vendor;
+        subsysid = pdev->subsystem_device;
+
+        printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
+                id->vendor, id->device, pci_bus);
+
+        printk("slot %d:func %d\n",
+                PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));
+
+        /* Read the base port and IRQ from PCI */
+        mega_baseport = pci_resource_start(pdev, 0);
+        irq = pdev->irq;
+
+        tbase = mega_baseport;
+        if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
+                flag |= BOARD_MEMMAP;
+
+                if (!request_mem_region(mega_baseport, 128, "megaraid")) {
+                        printk(KERN_WARNING "megaraid: mem region busy!\n");
+                        goto out_disable_device;
+                }
+
+                mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
+                if (!mega_baseport) {
+                        printk(KERN_WARNING
+                               "megaraid: could not map hba memory\n");
+                        goto out_release_region;
+                }
+        } else {
+                flag |= BOARD_IOMAP;
+                mega_baseport += 0x10;
+
+                if (!request_region(mega_baseport, 16, "megaraid"))
+                        goto out_disable_device;
+        }
+
+        /* Initialize SCSI Host structure */
+        host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
+        if (!host)
+                goto out_iounmap;
+
+        adapter = (adapter_t *)host->hostdata;
+        memset(adapter, 0, sizeof(adapter_t));
+
+        printk(KERN_NOTICE
+                "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
+                host->host_no, mega_baseport, irq);
+
+        adapter->base = mega_baseport;
+
+        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);
+        scsi_assign_lock(host, &adapter->lock);
+
+        host->cmd_per_lun = max_cmd_per_lun;
+        host->max_sectors = max_sectors_per_io;
+
+        adapter->dev = pdev;
+        adapter->host = host;
+
+        adapter->host->irq = irq;
+
+        if (flag & BOARD_MEMMAP)
+                adapter->host->base = tbase;
+        else {
+                adapter->host->io_port = tbase;
+                adapter->host->n_io_port = 16;
+        }
+
+        adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
+
+        /*
+         * Allocate buffer to issue internal commands.
+         */
+        adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
+                MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
+        if (!adapter->mega_buffer) {
+                printk(KERN_WARNING "megaraid: out of RAM.\n");
+                goto out_host_put;
+        }
+
+        adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
+        if (!adapter->scb_list) {
+                printk(KERN_WARNING "megaraid: out of RAM.\n");
+                goto out_free_cmd_buffer;
+        }
+
+        if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
+                                megaraid_isr_memmapped : megaraid_isr_iomapped,
+                                        SA_SHIRQ, "megaraid", adapter)) {
+                printk(KERN_WARNING
+                        "megaraid: Couldn't register IRQ %d!\n", irq);
+                goto out_free_scb_list;
+        }
+
+        if (mega_setup_mailbox(adapter))
+                goto out_free_irq;
+
+        if (mega_query_adapter(adapter))
+                goto out_free_mbox;
+
+        /*
+         * Have checks for some buggy f/w
+         */
+        if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
+                /*
+                 * Which firmware
+                 */
+                if (!strcmp(adapter->fw_version, "3.00") ||
+                                !strcmp(adapter->fw_version, "3.01")) {
+
+                        printk( KERN_WARNING
+                                "megaraid: Your  card is a Dell PERC "
+                                "2/SC RAID controller with  "
+                                "firmware\nmegaraid: 3.00 or 3.01.  "
+                                "This driver is known to have "
+                                "corruption issues\nmegaraid: with "
+                                "those firmware versions on this "
+                                "specific card.  In order\nmegaraid: "
+                                "to protect your data, please upgrade "
+                                "your firmware to version\nmegaraid: "
+                                "3.10 or later, available from the "
+                                "Dell Technical Support web\n"
+                                "megaraid: site at\nhttp://support."
+                                "dell.com/us/en/filelib/download/"
+                                "index.asp?fileid=2940\n"
+                        );
+                }
+        }
+
+        /*
+         * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
+         * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
+         * support, since this firmware cannot handle 64 bit
+         * addressing
+         */
+        if ((subsysvid == HP_SUBSYS_VID) &&
+            ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
+                /*
+                 * which firmware
+                 */
+                if (!strcmp(adapter->fw_version, "H01.07") ||
+                    !strcmp(adapter->fw_version, "H01.08") ||
+                    !strcmp(adapter->fw_version, "H01.09") ) {
+                        printk(KERN_WARNING
+                                "megaraid: Firmware H.01.07, "
+                                "H.01.08, and H.01.09 on 1M/2M "
+                                "controllers\n"
+                                "megaraid: do not support 64 bit "
+                                "addressing.\nmegaraid: DISABLING "
+                                "64 bit support.\n");
+                        adapter->flag &= ~BOARD_64BIT;
+                }
+        }
+
+        if (mega_is_bios_enabled(adapter))
+                mega_hbas[hba_count].is_bios_enabled = 1;
+        mega_hbas[hba_count].hostdata_addr = adapter;
+
+        /*
+         * Find out which channel is raid and which is scsi. This is
+         * for ROMB support.
+         */
+        mega_enum_raid_scsi(adapter);
+
+        /*
+         * Find out if a logical drive is set as the boot drive. If
+         * there is one, will make that as the first logical drive.
+         * ROMB: Do we have to boot from a physical drive. Then all
+         * the physical drives would appear before the logical disks.
+         * Else, all the physical drives would be exported to the mid
+         * layer after logical drives.
+         */
+        mega_get_boot_drv(adapter);
+
+        if (adapter->boot_pdrv_enabled) {
+                j = adapter->product_info.nchannels;
+                for( i = 0; i < j; i++ )
+                        adapter->logdrv_chan[i] = 0;
+                for( i = j; i < NVIRT_CHAN + j; i++ )
+                        adapter->logdrv_chan[i] = 1;
+        } else {
+                for (i = 0; i < NVIRT_CHAN; i++)
+                        adapter->logdrv_chan[i] = 1;
+                for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
+                        adapter->logdrv_chan[i] = 0;
+                adapter->mega_ch_class <<= NVIRT_CHAN;
+        }
+
+        /*
+         * Do we support random deletion and addition of logical
+         * drives
+         */
+        adapter->read_ldidmap = 0;      /* set it after first logdrv
+                                                   delete cmd */
+        adapter->support_random_del = mega_support_random_del(adapter);
+
+        /* Initialize SCBs */
+        if (mega_init_scb(adapter))
+                goto out_free_mbox;
+
+        /*
+         * Reset the pending commands counter
+         */
+        atomic_set(&adapter->pend_cmds, 0);
+
+        /*
+         * Reset the adapter quiescent flag
+         */
+        atomic_set(&adapter->quiescent, 0);
+
+        hba_soft_state[hba_count] = adapter;
+
+        /*
+         * Fill in the structure which needs to be passed back to the
+         * application when it does an ioctl() for controller related
+         * information.
+         */
+        i = hba_count;
+
+        mcontroller[i].base = mega_baseport;
+        mcontroller[i].irq = irq;
+        mcontroller[i].numldrv = adapter->numldrv;
+        mcontroller[i].pcibus = pci_bus;
+        mcontroller[i].pcidev = id->device;
+        mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
+        mcontroller[i].pciid = -1;
+        mcontroller[i].pcivendor = id->vendor;
+        mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
+        mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
+
+
+        /* Set the Mode of addressing to 64 bit if we can */
+        if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
+                pci_set_dma_mask(pdev, 0xffffffffffffffffULL);
+                adapter->has_64bit_addr = 1;
+        } else  {
+                pci_set_dma_mask(pdev, 0xffffffff);
+                adapter->has_64bit_addr = 0;
+        }
+                
+        init_MUTEX(&adapter->int_mtx);
+        init_waitqueue_head(&adapter->int_waitq);
+
+        adapter->this_id = DEFAULT_INITIATOR_ID;
+        adapter->host->this_id = DEFAULT_INITIATOR_ID;
+
+#if MEGA_HAVE_CLUSTERING
+        /*
+         * Is cluster support enabled on this controller
+         * Note: In a cluster the HBAs ( the initiators ) will have
+         * different target IDs and we cannot assume it to be 7. Call
+         * to mega_support_cluster() will get the target ids also if
+         * the cluster support is available
+         */
+        adapter->has_cluster = mega_support_cluster(adapter);
+        if (adapter->has_cluster) {
+                printk(KERN_NOTICE
+                        "megaraid: Cluster driver, initiator id:%d\n",
+                        adapter->this_id);
+        }
+#endif
+
+        pci_set_drvdata(pdev, host);
+
+        mega_create_proc_entry(hba_count, mega_proc_dir_entry);
+
+        error = scsi_add_host(host, &pdev->dev);
+        if (error)
+                goto out_free_mbox;
+
+        scsi_scan_host(host);
+        hba_count++;
+        return 0;
+
+ out_free_mbox:
+        pci_free_consistent(adapter->dev, sizeof(mbox64_t),
+                        adapter->una_mbox64, adapter->una_mbox64_dma);
+ out_free_irq:
+        free_irq(adapter->host->irq, adapter);
+ out_free_scb_list:
+        kfree(adapter->scb_list);
+ out_free_cmd_buffer:
+        pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
+                        adapter->mega_buffer, adapter->buf_dma_handle);
+ out_host_put:
+        scsi_host_put(host);
+ out_iounmap:
+        if (flag & BOARD_MEMMAP)
+                iounmap((void *)mega_baseport);
+ out_release_region:
+        if (flag & BOARD_MEMMAP)
+                release_mem_region(tbase, 128);
+        else
+                release_region(mega_baseport, 16);
+ out_disable_device:
+        pci_disable_device(pdev);
+ out:
+        return error;
+}
+
+static void
+__megaraid_shutdown(adapter_t *adapter)
+{
+        u_char  raw_mbox[sizeof(struct mbox_out)];
+        mbox_t  *mbox = (mbox_t *)raw_mbox;
+        int     i;
+
+        /* Flush adapter cache */
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+        raw_mbox[0] = FLUSH_ADAPTER;
+
+        free_irq(adapter->host->irq, adapter);
+
+        /* Issue a blocking (interrupts disabled) command to the card */
+        issue_scb_block(adapter, raw_mbox);
+
+        /* Flush disks cache */
+        memset(&mbox->m_out, 0, sizeof(raw_mbox));
+        raw_mbox[0] = FLUSH_SYSTEM;
+
+        /* Issue a blocking (interrupts disabled) command to the card */
+        issue_scb_block(adapter, raw_mbox);
+        
+        if (atomic_read(&adapter->pend_cmds) > 0)
+                printk(KERN_WARNING "megaraid: pending commands!!\n");
+
+        /*
+         * Have a delibrate delay to make sure all the caches are
+         * actually flushed.
+         */
+        for (i = 0; i <= 10; i++)
+                mdelay(1000);
+}
+
+static void
+megaraid_remove_one(struct pci_dev *pdev)
+{
+        struct Scsi_Host *host = pci_get_drvdata(pdev);
+        adapter_t *adapter = (adapter_t *)host->hostdata;
+        char    buf[12] = { 0 };
+
+        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
+                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 device *dev)
+{
+        struct Scsi_Host *host = pci_get_drvdata(to_pci_dev(dev));
+        adapter_t *adapter = (adapter_t *)host->hostdata;
+
+        __megaraid_shutdown(adapter);
+}
+
+static struct pci_device_id megaraid_pci_tbl[] = {
+        {PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DISCOVERY,
+                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+        {PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4_DI,
+                PCI_ANY_ID, PCI_ANY_ID, 0, 0, BOARD_64BIT},
+        {PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_PERC4_QC_VERDE,
+                PCI_ANY_ID, PCI_ANY_ID, 0, 0, BOARD_64BIT},
+        {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_AMI, PCI_DEVICE_ID_AMI_MEGARAID3,
+                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},
+        {PCI_VENDOR_ID_LSI_LOGIC, 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",
+        .id_table       = megaraid_pci_tbl,
+        .probe          = megaraid_probe_one,
+        .remove         = __devexit_p(megaraid_remove_one),
+        .driver         = {
+                .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", &proc_root);
+        if (!mega_proc_dir_entry) {
+                printk(KERN_WARNING
+                                "megaraid: failed to create megaraid root\n");
+        }
+#endif
+        error = pci_module_init(&megaraid_pci_driver);
+        if (error) {
+#ifdef CONFIG_PROC_FS
+                remove_proc_entry("megaraid", &proc_root);
+#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", &megadev_fops);
+        if (!major) {
+                printk(KERN_WARNING
+                                "megaraid: failed to register char device\n");
+        }
+
+        return 0;
+}
+
+static void __exit megaraid_exit(void)
+{
+        /*
+         * Unregister the character device interface to the driver.
+         */
+        unregister_chrdev(major, "megadev");
+
+        pci_unregister_driver(&megaraid_pci_driver);
+
+#ifdef CONFIG_PROC_FS
+        remove_proc_entry("megaraid", &proc_root);
+#endif
+}
+
+module_init(megaraid_init);
+module_exit(megaraid_exit);
+
+/* vi: set ts=8 sw=8 tw=78: */