// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
                          dpti.c  -  description
                             -------------------
    begin                : Thu Sep 7 2000
    copyright            : (C) 2000 by Adaptec

                           July 30, 2001 First version being submitted
                           for inclusion in the kernel.  V2.4

    See Documentation/scsi/dpti.rst for history, notes, license info
    and credits
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *                                                                         *
 ***************************************************************************/
/***************************************************************************
 * Sat Dec 20 2003 Go Taniguchi <go@turbolinux.co.jp>
 - Support 2.6 kernel and DMA-mapping
 - ioctl fix for raid tools
 - use schedule_timeout in long long loop
 **************************************************************************/

/*#define DEBUG 1 */
/*#define UARTDELAY 1 */

#include <linux/module.h>
#include <linux/pgtable.h>

MODULE_AUTHOR("Deanna Bonds, with _lots_ of help from Mark Salyzyn");
MODULE_DESCRIPTION("Adaptec I2O RAID Driver");

////////////////////////////////////////////////////////////////

#include <linux/ioctl.h>        /* For SCSI-Passthrough */
#include <linux/uaccess.h>

#include <linux/stat.h>
#include <linux/slab.h>         /* for kmalloc() */
#include <linux/pci.h>          /* for PCI support */
#include <linux/proc_fs.h>
#include <linux/blkdev.h>
#include <linux/delay.h>        /* for udelay */
#include <linux/interrupt.h>
#include <linux/kernel.h>       /* for printk */
#include <linux/sched.h>
#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>

#include <linux/timer.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/mutex.h>

#include <asm/processor.h>      /* for boot_cpu_data */
#include <asm/io.h>             /* for virt_to_bus, etc. */

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>

#include "dpt/dptsig.h"
#include "dpti.h"

/*============================================================================
 * Create a binary signature - this is read by dptsig
 * Needed for our management apps
 *============================================================================
 */
static DEFINE_MUTEX(adpt_mutex);
static dpt_sig_S DPTI_sig = {
        {'d', 'P', 't', 'S', 'i', 'G'}, SIG_VERSION,
#ifdef __i386__
        PROC_INTEL, PROC_386 | PROC_486 | PROC_PENTIUM | PROC_SEXIUM,
#elif defined(__ia64__)
        PROC_INTEL, PROC_IA64,
#elif defined(__sparc__)
        PROC_ULTRASPARC, PROC_ULTRASPARC,
#elif defined(__alpha__)
        PROC_ALPHA, PROC_ALPHA,
#else
        (-1),(-1),
#endif
         FT_HBADRVR, 0, OEM_DPT, OS_LINUX, CAP_OVERLAP, DEV_ALL,
        ADF_ALL_SC5, 0, 0, DPT_VERSION, DPT_REVISION, DPT_SUBREVISION,
        DPT_MONTH, DPT_DAY, DPT_YEAR, "Adaptec Linux I2O RAID Driver"
};




/*============================================================================
 * Globals
 *============================================================================
 */

static DEFINE_MUTEX(adpt_configuration_lock);

static struct i2o_sys_tbl *sys_tbl;
static dma_addr_t sys_tbl_pa;
static int sys_tbl_ind;
static int sys_tbl_len;

static adpt_hba* hba_chain = NULL;
static int hba_count = 0;

static struct class *adpt_sysfs_class;

static long adpt_unlocked_ioctl(struct file *, unsigned int, unsigned long);
#ifdef CONFIG_COMPAT
static long compat_adpt_ioctl(struct file *, unsigned int, unsigned long);
#endif

static const struct file_operations adpt_fops = {
        .unlocked_ioctl = adpt_unlocked_ioctl,
        .open           = adpt_open,
        .release        = adpt_close,
#ifdef CONFIG_COMPAT
        .compat_ioctl   = compat_adpt_ioctl,
#endif
        .llseek         = noop_llseek,
};

/* Structures and definitions for synchronous message posting.
 * See adpt_i2o_post_wait() for description
 * */
struct adpt_i2o_post_wait_data
{
        int status;
        u32 id;
        adpt_wait_queue_head_t *wq;
        struct adpt_i2o_post_wait_data *next;
};

static struct adpt_i2o_post_wait_data *adpt_post_wait_queue = NULL;
static u32 adpt_post_wait_id = 0;
static DEFINE_SPINLOCK(adpt_post_wait_lock);


/*============================================================================
 *                              Functions
 *============================================================================
 */

static inline int dpt_dma64(adpt_hba *pHba)
{
        return (sizeof(dma_addr_t) > 4 && (pHba)->dma64);
}

static inline u32 dma_high(dma_addr_t addr)
{
        return upper_32_bits(addr);
}

static inline u32 dma_low(dma_addr_t addr)
{
        return (u32)addr;
}

static u8 adpt_read_blink_led(adpt_hba* host)
{
        if (host->FwDebugBLEDflag_P) {
                if( readb(host->FwDebugBLEDflag_P) == 0xbc ){
                        return readb(host->FwDebugBLEDvalue_P);
                }
        }
        return 0;
}

/*============================================================================
 * Scsi host template interface functions
 *============================================================================
 */

#ifdef MODULE
static struct pci_device_id dptids[] = {
        { PCI_DPT_VENDOR_ID, PCI_DPT_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
        { PCI_DPT_VENDOR_ID, PCI_DPT_RAPTOR_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
        { 0, }
};
#endif

MODULE_DEVICE_TABLE(pci,dptids);

static int adpt_detect(struct scsi_host_template* sht)
{
        struct pci_dev *pDev = NULL;
        adpt_hba *pHba;
        adpt_hba *next;

        PINFO("Detecting Adaptec I2O RAID controllers...\n");

        /* search for all Adatpec I2O RAID cards */
        while ((pDev = pci_get_device( PCI_DPT_VENDOR_ID, PCI_ANY_ID, pDev))) {
                if(pDev->device == PCI_DPT_DEVICE_ID ||
                   pDev->device == PCI_DPT_RAPTOR_DEVICE_ID){
                        if(adpt_install_hba(sht, pDev) ){
                                PERROR("Could not Init an I2O RAID device\n");
                                PERROR("Will not try to detect others.\n");
                                return hba_count-1;
                        }
                        pci_dev_get(pDev);
                }
        }

        /* In INIT state, Activate IOPs */
        for (pHba = hba_chain; pHba; pHba = next) {
                next = pHba->next;
                // Activate does get status , init outbound, and get hrt
                if (adpt_i2o_activate_hba(pHba) < 0) {
                        adpt_i2o_delete_hba(pHba);
                }
        }


        /* Active IOPs in HOLD state */

rebuild_sys_tab:
        if (hba_chain == NULL) 
                return 0;

        /*
         * If build_sys_table fails, we kill everything and bail
         * as we can't init the IOPs w/o a system table
         */     
        if (adpt_i2o_build_sys_table() < 0) {
                adpt_i2o_sys_shutdown();
                return 0;
        }

        PDEBUG("HBA's in HOLD state\n");

        /* If IOP don't get online, we need to rebuild the System table */
        for (pHba = hba_chain; pHba; pHba = pHba->next) {
                if (adpt_i2o_online_hba(pHba) < 0) {
                        adpt_i2o_delete_hba(pHba);      
                        goto rebuild_sys_tab;
                }
        }

        /* Active IOPs now in OPERATIONAL state */
        PDEBUG("HBA's in OPERATIONAL state\n");

        printk("dpti: If you have a lot of devices this could take a few minutes.\n");
        for (pHba = hba_chain; pHba; pHba = next) {
                next = pHba->next;
                printk(KERN_INFO"%s: Reading the hardware resource table.\n", pHba->name);
                if (adpt_i2o_lct_get(pHba) < 0){
                        adpt_i2o_delete_hba(pHba);
                        continue;
                }

                if (adpt_i2o_parse_lct(pHba) < 0){
                        adpt_i2o_delete_hba(pHba);
                        continue;
                }
                adpt_inquiry(pHba);
        }

        adpt_sysfs_class = class_create(THIS_MODULE, "dpt_i2o");
        if (IS_ERR(adpt_sysfs_class)) {
                printk(KERN_WARNING"dpti: unable to create dpt_i2o class\n");
                adpt_sysfs_class = NULL;
        }

        for (pHba = hba_chain; pHba; pHba = next) {
                next = pHba->next;
                if (adpt_scsi_host_alloc(pHba, sht) < 0){
                        adpt_i2o_delete_hba(pHba);
                        continue;
                }
                pHba->initialized = TRUE;
                pHba->state &= ~DPTI_STATE_RESET;
                if (adpt_sysfs_class) {
                        struct device *dev = device_create(adpt_sysfs_class,
                                NULL, MKDEV(DPTI_I2O_MAJOR, pHba->unit), NULL,
                                "dpti%d", pHba->unit);
                        if (IS_ERR(dev)) {
                                printk(KERN_WARNING"dpti%d: unable to "
                                        "create device in dpt_i2o class\n",
                                        pHba->unit);
                        }
                }
        }

        // Register our control device node
        // nodes will need to be created in /dev to access this
        // the nodes can not be created from within the driver
        if (hba_count && register_chrdev(DPTI_I2O_MAJOR, DPT_DRIVER, &adpt_fops)) {
                adpt_i2o_sys_shutdown();
                return 0;
        }
        return hba_count;
}


static void adpt_release(adpt_hba *pHba)
{
        struct Scsi_Host *shost = pHba->host;

        scsi_remove_host(shost);
//      adpt_i2o_quiesce_hba(pHba);
        adpt_i2o_delete_hba(pHba);
        scsi_host_put(shost);
}


static void adpt_inquiry(adpt_hba* pHba)
{
        u32 msg[17]; 
        u32 *mptr;
        u32 *lenptr;
        int direction;
        int scsidir;
        u32 len;
        u32 reqlen;
        u8* buf;
        dma_addr_t addr;
        u8  scb[16];
        s32 rcode;

        memset(msg, 0, sizeof(msg));
        buf = dma_alloc_coherent(&pHba->pDev->dev, 80, &addr, GFP_KERNEL);
        if(!buf){
                printk(KERN_ERR"%s: Could not allocate buffer\n",pHba->name);
                return;
        }
        memset((void*)buf, 0, 36);
        
        len = 36;
        direction = 0x00000000; 
        scsidir  =0x40000000;   // DATA IN  (iop<--dev)

        if (dpt_dma64(pHba))
                reqlen = 17;            // SINGLE SGE, 64 bit
        else
                reqlen = 14;            // SINGLE SGE, 32 bit
        /* Stick the headers on */
        msg[0] = reqlen<<16 | SGL_OFFSET_12;
        msg[1] = (0xff<<24|HOST_TID<<12|ADAPTER_TID);
        msg[2] = 0;
        msg[3]  = 0;
        // Adaptec/DPT Private stuff 
        msg[4] = I2O_CMD_SCSI_EXEC|DPT_ORGANIZATION_ID<<16;
        msg[5] = ADAPTER_TID | 1<<16 /* Interpret*/;
        /* Direction, disconnect ok | sense data | simple queue , CDBLen */
        // I2O_SCB_FLAG_ENABLE_DISCONNECT | 
        // I2O_SCB_FLAG_SIMPLE_QUEUE_TAG | 
        // I2O_SCB_FLAG_SENSE_DATA_IN_MESSAGE;
        msg[6] = scsidir|0x20a00000| 6 /* cmd len*/;

        mptr=msg+7;

        memset(scb, 0, sizeof(scb));
        // Write SCSI command into the message - always 16 byte block 
        scb[0] = INQUIRY;
        scb[1] = 0;
        scb[2] = 0;
        scb[3] = 0;
        scb[4] = 36;
        scb[5] = 0;
        // Don't care about the rest of scb

        memcpy(mptr, scb, sizeof(scb));
        mptr+=4;
        lenptr=mptr++;          /* Remember me - fill in when we know */

        /* Now fill in the SGList and command */
        *lenptr = len;
        if (dpt_dma64(pHba)) {
                *mptr++ = (0x7C<<24)+(2<<16)+0x02; /* Enable 64 bit */
                *mptr++ = 1 << PAGE_SHIFT;
                *mptr++ = 0xD0000000|direction|len;
                *mptr++ = dma_low(addr);
                *mptr++ = dma_high(addr);
        } else {
                *mptr++ = 0xD0000000|direction|len;
                *mptr++ = addr;
        }

        // Send it on it's way
        rcode = adpt_i2o_post_wait(pHba, msg, reqlen<<2, 120);
        if (rcode != 0) {
                sprintf(pHba->detail, "Adaptec I2O RAID");
                printk(KERN_INFO "%s: Inquiry Error (%d)\n",pHba->name,rcode);
                if (rcode != -ETIME && rcode != -EINTR)
                        dma_free_coherent(&pHba->pDev->dev, 80, buf, addr);
        } else {
                memset(pHba->detail, 0, sizeof(pHba->detail));
                memcpy(&(pHba->detail), "Vendor: Adaptec ", 16);
                memcpy(&(pHba->detail[16]), " Model: ", 8);
                memcpy(&(pHba->detail[24]), (u8*) &buf[16], 16);
                memcpy(&(pHba->detail[40]), " FW: ", 4);
                memcpy(&(pHba->detail[44]), (u8*) &buf[32], 4);
                pHba->detail[48] = '\0';        /* precautionary */
                dma_free_coherent(&pHba->pDev->dev, 80, buf, addr);
        }
        adpt_i2o_status_get(pHba);
        return ;
}


static int adpt_slave_configure(struct scsi_device * device)
{
        struct Scsi_Host *host = device->host;

        if (host->can_queue && device->tagged_supported) {
                scsi_change_queue_depth(device,
                                host->can_queue - 1);
        }
        return 0;
}

static int adpt_queue_lck(struct scsi_cmnd *cmd)
{
        adpt_hba* pHba = NULL;
        struct adpt_device* pDev = NULL;        /* dpt per device information */

        /*
         * SCSI REQUEST_SENSE commands will be executed automatically by the 
         * Host Adapter for any errors, so they should not be executed 
         * explicitly unless the Sense Data is zero indicating that no error 
         * occurred.
         */

        if ((cmd->cmnd[0] == REQUEST_SENSE) && (cmd->sense_buffer[0] != 0)) {
                cmd->result = (DID_OK << 16);
                scsi_done(cmd);
                return 0;
        }

        pHba = (adpt_hba*)cmd->device->host->hostdata[0];
        if (!pHba) {
                return FAILED;
        }

        rmb();
        if ((pHba->state) & DPTI_STATE_RESET)
                return SCSI_MLQUEUE_HOST_BUSY;

        // TODO if the cmd->device if offline then I may need to issue a bus rescan
        // followed by a get_lct to see if the device is there anymore
        if((pDev = (struct adpt_device*) (cmd->device->hostdata)) == NULL) {
                /*
                 * First command request for this device.  Set up a pointer
                 * to the device structure.  This should be a TEST_UNIT_READY
                 * command from scan_scsis_single.
                 */
                if ((pDev = adpt_find_device(pHba, (u32)cmd->device->channel, (u32)cmd->device->id, cmd->device->lun)) == NULL) {
                        // TODO: if any luns are at this bus, scsi id then fake a TEST_UNIT_READY and INQUIRY response 
                        // with type 7F (for all luns less than the max for this bus,id) so the lun scan will continue.
                        cmd->result = (DID_NO_CONNECT << 16);
                        scsi_done(cmd);
                        return 0;
                }
                cmd->device->hostdata = pDev;
        }
        pDev->pScsi_dev = cmd->device;

        /*
         * If we are being called from when the device is being reset, 
         * delay processing of the command until later.
         */
        if (pDev->state & DPTI_DEV_RESET ) {
                return FAILED;
        }
        return adpt_scsi_to_i2o(pHba, cmd, pDev);
}

static DEF_SCSI_QCMD(adpt_queue)

static int adpt_bios_param(struct scsi_device *sdev, struct block_device *dev,
                sector_t capacity, int geom[])
{
        int heads=-1;
        int sectors=-1;
        int cylinders=-1;

        // *** First lets set the default geometry ****
        
        // If the capacity is less than ox2000
        if (capacity < 0x2000 ) {       // floppy
                heads = 18;
                sectors = 2;
        } 
        // else if between 0x2000 and 0x20000
        else if (capacity < 0x20000) {
                heads = 64;
                sectors = 32;
        }
        // else if between 0x20000 and 0x40000
        else if (capacity < 0x40000) {
                heads = 65;
                sectors = 63;
        }
        // else if between 0x4000 and 0x80000
        else if (capacity < 0x80000) {
                heads = 128;
                sectors = 63;
        }
        // else if greater than 0x80000
        else {
                heads = 255;
                sectors = 63;
        }
        cylinders = sector_div(capacity, heads * sectors);

        // Special case if CDROM
        if(sdev->type == 5) {  // CDROM
                heads = 252;
                sectors = 63;
                cylinders = 1111;
        }

        geom[0] = heads;
        geom[1] = sectors;
        geom[2] = cylinders;
        
        PDEBUG("adpt_bios_param: exit\n");
        return 0;
}


static const char *adpt_info(struct Scsi_Host *host)
{
        adpt_hba* pHba;

        pHba = (adpt_hba *) host->hostdata[0];
        return (char *) (pHba->detail);
}

static int adpt_show_info(struct seq_file *m, struct Scsi_Host *host)
{
        struct adpt_device* d;
        int id;
        int chan;
        adpt_hba* pHba;
        int unit;

        // Find HBA (host bus adapter) we are looking for
        mutex_lock(&adpt_configuration_lock);
        for (pHba = hba_chain; pHba; pHba = pHba->next) {
                if (pHba->host == host) {
                        break;  /* found adapter */
                }
        }
        mutex_unlock(&adpt_configuration_lock);
        if (pHba == NULL) {
                return 0;
        }
        host = pHba->host;

        seq_printf(m, "Adaptec I2O RAID Driver Version: %s\n\n", DPT_I2O_VERSION);
        seq_printf(m, "%s\n", pHba->detail);
        seq_printf(m, "SCSI Host=scsi%d  Control Node=/dev/%s  irq=%d\n", 
                        pHba->host->host_no, pHba->name, host->irq);
        seq_printf(m, "\tpost fifo size  = %d\n\treply fifo size = %d\n\tsg table size   = %d\n\n",
                        host->can_queue, (int) pHba->reply_fifo_size , host->sg_tablesize);

        seq_puts(m, "Devices:\n");
        for(chan = 0; chan < MAX_CHANNEL; chan++) {
                for(id = 0; id < MAX_ID; id++) {
                        d = pHba->channel[chan].device[id];
                        while(d) {
                                seq_printf(m,"\t%-24.24s", d->pScsi_dev->vendor);
                                seq_printf(m," Rev: %-8.8s\n", d->pScsi_dev->rev);

                                unit = d->pI2o_dev->lct_data.tid;
                                seq_printf(m, "\tTID=%d, (Channel=%d, Target=%d, Lun=%llu)  (%s)\n\n",
                                               unit, (int)d->scsi_channel, (int)d->scsi_id, d->scsi_lun,
                                               scsi_device_online(d->pScsi_dev)? "online":"offline"); 
                                d = d->next_lun;
                        }
                }
        }
        return 0;
}

/*
 *      Turn a pointer to ioctl reply data into an u32 'context'
 */
static u32 adpt_ioctl_to_context(adpt_hba * pHba, void *reply)
{
#if BITS_PER_LONG == 32
        return (u32)(unsigned long)reply;
#else
        ulong flags = 0;
        u32 nr, i;

        spin_lock_irqsave(pHba->host->host_lock, flags);
        nr = ARRAY_SIZE(pHba->ioctl_reply_context);
        for (i = 0; i < nr; i++) {
                if (pHba->ioctl_reply_context[i] == NULL) {
                        pHba->ioctl_reply_context[i] = reply;
                        break;
                }
        }
        spin_unlock_irqrestore(pHba->host->host_lock, flags);
        if (i >= nr) {
                printk(KERN_WARNING"%s: Too many outstanding "
                                "ioctl commands\n", pHba->name);
                return (u32)-1;
        }

        return i;
#endif
}

/*
 *      Go from an u32 'context' to a pointer to ioctl reply data.
 */
static void *adpt_ioctl_from_context(adpt_hba *pHba, u32 context)
{
#if BITS_PER_LONG == 32
        return (void *)(unsigned long)context;
#else
        void *p = pHba->ioctl_reply_context[context];
        pHba->ioctl_reply_context[context] = NULL;

        return p;
#endif
}

/*===========================================================================
 * Error Handling routines
 *===========================================================================
 */

static int adpt_abort(struct scsi_cmnd * cmd)
{
        adpt_hba* pHba = NULL;  /* host bus adapter structure */
        struct adpt_device* dptdevice;  /* dpt per device information */
        u32 msg[5];
        int rcode;

        pHba = (adpt_hba*) cmd->device->host->hostdata[0];
        printk(KERN_INFO"%s: Trying to Abort\n",pHba->name);
        if ((dptdevice = (void*) (cmd->device->hostdata)) == NULL) {
                printk(KERN_ERR "%s: Unable to abort: No device in cmnd\n",pHba->name);
                return FAILED;
        }

        memset(msg, 0, sizeof(msg));
        msg[0] = FIVE_WORD_MSG_SIZE|SGL_OFFSET_0;
        msg[1] = I2O_CMD_SCSI_ABORT<<24|HOST_TID<<12|dptdevice->tid;
        msg[2] = 0;
        msg[3]= 0;
        /* Add 1 to avoid firmware treating it as invalid command */
        msg[4] = scsi_cmd_to_rq(cmd)->tag + 1;
        if (pHba->host)
                spin_lock_irq(pHba->host->host_lock);
        rcode = adpt_i2o_post_wait(pHba, msg, sizeof(msg), FOREVER);
        if (pHba->host)
                spin_unlock_irq(pHba->host->host_lock);
        if (rcode != 0) {
                if(rcode == -EOPNOTSUPP ){
                        printk(KERN_INFO"%s: Abort cmd not supported\n",pHba->name);
                        return FAILED;
                }
                printk(KERN_INFO"%s: Abort failed.\n",pHba->name);
                return FAILED;
        } 
        printk(KERN_INFO"%s: Abort complete.\n",pHba->name);
        return SUCCESS;
}


#define I2O_DEVICE_RESET 0x27
// This is the same for BLK and SCSI devices
// NOTE this is wrong in the i2o.h definitions
// This is not currently supported by our adapter but we issue it anyway
static int adpt_device_reset(struct scsi_cmnd* cmd)
{
        adpt_hba* pHba;
        u32 msg[4];
        u32 rcode;
        int old_state;
        struct adpt_device* d = cmd->device->hostdata;

        pHba = (void*) cmd->device->host->hostdata[0];
        printk(KERN_INFO"%s: Trying to reset device\n",pHba->name);
        if (!d) {
                printk(KERN_INFO"%s: Reset Device: Device Not found\n",pHba->name);
                return FAILED;
        }
        memset(msg, 0, sizeof(msg));
        msg[0] = FOUR_WORD_MSG_SIZE|SGL_OFFSET_0;
        msg[1] = (I2O_DEVICE_RESET<<24|HOST_TID<<12|d->tid);
        msg[2] = 0;
        msg[3] = 0;

        if (pHba->host)
                spin_lock_irq(pHba->host->host_lock);
        old_state = d->state;
        d->state |= DPTI_DEV_RESET;
        rcode = adpt_i2o_post_wait(pHba, msg,sizeof(msg), FOREVER);
        d->state = old_state;
        if (pHba->host)
                spin_unlock_irq(pHba->host->host_lock);
        if (rcode != 0) {
                if(rcode == -EOPNOTSUPP ){
                        printk(KERN_INFO"%s: Device reset not supported\n",pHba->name);
                        return FAILED;
                }
                printk(KERN_INFO"%s: Device reset failed\n",pHba->name);
                return FAILED;
        } else {
                printk(KERN_INFO"%s: Device reset successful\n",pHba->name);
                return SUCCESS;
        }
}


#define I2O_HBA_BUS_RESET 0x87
// This version of bus reset is called by the eh_error handler
static int adpt_bus_reset(struct scsi_cmnd* cmd)
{
        adpt_hba* pHba;
        u32 msg[4];
        u32 rcode;

        pHba = (adpt_hba*)cmd->device->host->hostdata[0];
        memset(msg, 0, sizeof(msg));
        printk(KERN_WARNING"%s: Bus reset: SCSI Bus %d: tid: %d\n",pHba->name, cmd->device->channel,pHba->channel[cmd->device->channel].tid );
        msg[0] = FOUR_WORD_MSG_SIZE|SGL_OFFSET_0;
        msg[1] = (I2O_HBA_BUS_RESET<<24|HOST_TID<<12|pHba->channel[cmd->device->channel].tid);
        msg[2] = 0;
        msg[3] = 0;
        if (pHba->host)
                spin_lock_irq(pHba->host->host_lock);
        rcode = adpt_i2o_post_wait(pHba, msg,sizeof(msg), FOREVER);
        if (pHba->host)
                spin_unlock_irq(pHba->host->host_lock);
        if (rcode != 0) {
                printk(KERN_WARNING"%s: Bus reset failed.\n",pHba->name);
                return FAILED;
        } else {
                printk(KERN_WARNING"%s: Bus reset success.\n",pHba->name);
                return SUCCESS;
        }
}

// This version of reset is called by the eh_error_handler
static int __adpt_reset(struct scsi_cmnd* cmd)
{
        adpt_hba* pHba;
        int rcode;
        char name[32];

        pHba = (adpt_hba*)cmd->device->host->hostdata[0];
        strncpy(name, pHba->name, sizeof(name));
        printk(KERN_WARNING"%s: Hba Reset: scsi id %d: tid: %d\n", name, cmd->device->channel, pHba->channel[cmd->device->channel].tid);
        rcode =  adpt_hba_reset(pHba);
        if(rcode == 0){
                printk(KERN_WARNING"%s: HBA reset complete\n", name);
                return SUCCESS;
        } else {
                printk(KERN_WARNING"%s: HBA reset failed (%x)\n", name, rcode);
                return FAILED;
        }
}

static int adpt_reset(struct scsi_cmnd* cmd)
{
        int rc;

        spin_lock_irq(cmd->device->host->host_lock);
        rc = __adpt_reset(cmd);
        spin_unlock_irq(cmd->device->host->host_lock);

        return rc;
}

// This version of reset is called by the ioctls and indirectly from eh_error_handler via adpt_reset
static int adpt_hba_reset(adpt_hba* pHba)
{
        int rcode;

        pHba->state |= DPTI_STATE_RESET;

        // Activate does get status , init outbound, and get hrt
        if ((rcode=adpt_i2o_activate_hba(pHba)) < 0) {
                printk(KERN_ERR "%s: Could not activate\n", pHba->name);
                adpt_i2o_delete_hba(pHba);
                return rcode;
        }

        if ((rcode=adpt_i2o_build_sys_table()) < 0) {
                adpt_i2o_delete_hba(pHba);
                return rcode;
        }
        PDEBUG("%s: in HOLD state\n",pHba->name);

        if ((rcode=adpt_i2o_online_hba(pHba)) < 0) {
                adpt_i2o_delete_hba(pHba);      
                return rcode;
        }
        PDEBUG("%s: in OPERATIONAL state\n",pHba->name);

        if ((rcode=adpt_i2o_lct_get(pHba)) < 0){
                adpt_i2o_delete_hba(pHba);
                return rcode;
        }

        if ((rcode=adpt_i2o_reparse_lct(pHba)) < 0){
                adpt_i2o_delete_hba(pHba);
                return rcode;
        }
        pHba->state &= ~DPTI_STATE_RESET;

        scsi_host_complete_all_commands(pHba->host, DID_RESET);
        return 0;       /* return success */
}

/*===========================================================================
 * 
 *===========================================================================
 */


static void adpt_i2o_sys_shutdown(void)
{
        adpt_hba *pHba, *pNext;
        struct adpt_i2o_post_wait_data *p1, *old;

        printk(KERN_INFO "Shutting down Adaptec I2O controllers.\n");
        printk(KERN_INFO "   This could take a few minutes if there are many devices attached\n");
        /* Delete all IOPs from the controller chain */
        /* They should have already been released by the
         * scsi-core
         */
        for (pHba = hba_chain; pHba; pHba = pNext) {
                pNext = pHba->next;
                adpt_i2o_delete_hba(pHba);
        }

        /* Remove any timedout entries from the wait queue.  */
//      spin_lock_irqsave(&adpt_post_wait_lock, flags);
        /* Nothing should be outstanding at this point so just
         * free them 
         */
        for(p1 = adpt_post_wait_queue; p1;) {
                old = p1;
                p1 = p1->next;
                kfree(old);
        }
//      spin_unlock_irqrestore(&adpt_post_wait_lock, flags);
        adpt_post_wait_queue = NULL;

        printk(KERN_INFO "Adaptec I2O controllers down.\n");
}

static int adpt_install_hba(struct scsi_host_template* sht, struct pci_dev* pDev)
{

        adpt_hba* pHba = NULL;
        adpt_hba* p = NULL;
        ulong base_addr0_phys = 0;
        ulong base_addr1_phys = 0;
        u32 hba_map0_area_size = 0;
        u32 hba_map1_area_size = 0;
        void __iomem *base_addr_virt = NULL;
        void __iomem *msg_addr_virt = NULL;
        int dma64 = 0;

        int raptorFlag = FALSE;

        if(pci_enable_device(pDev)) {
                return -EINVAL;
        }

        if (pci_request_regions(pDev, "dpt_i2o")) {
                PERROR("dpti: adpt_config_hba: pci request region failed\n");
                return -EINVAL;
        }

        pci_set_master(pDev);

        /*
         *      See if we should enable dma64 mode.
         */
        if (sizeof(dma_addr_t) > 4 &&
            dma_get_required_mask(&pDev->dev) > DMA_BIT_MASK(32) &&
            dma_set_mask(&pDev->dev, DMA_BIT_MASK(64)) == 0)
                dma64 = 1;

        if (!dma64 && dma_set_mask(&pDev->dev, DMA_BIT_MASK(32)) != 0)
                return -EINVAL;

        /* adapter only supports message blocks below 4GB */
        dma_set_coherent_mask(&pDev->dev, DMA_BIT_MASK(32));

        base_addr0_phys = pci_resource_start(pDev,0);
        hba_map0_area_size = pci_resource_len(pDev,0);

        // Check if standard PCI card or single BAR Raptor
        if(pDev->device == PCI_DPT_DEVICE_ID){
                if(pDev->subsystem_device >=0xc032 && pDev->subsystem_device <= 0xc03b){
                        // Raptor card with this device id needs 4M
                        hba_map0_area_size = 0x400000;
                } else { // Not Raptor - it is a PCI card
                        if(hba_map0_area_size > 0x100000 ){ 
                                hba_map0_area_size = 0x100000;
                        }
                }
        } else {// Raptor split BAR config
                // Use BAR1 in this configuration
                base_addr1_phys = pci_resource_start(pDev,1);
                hba_map1_area_size = pci_resource_len(pDev,1);
                raptorFlag = TRUE;
        }

#if BITS_PER_LONG == 64
        /*
         *      The original Adaptec 64 bit driver has this comment here:
         *      "x86_64 machines need more optimal mappings"
         *
         *      I assume some HBAs report ridiculously large mappings
         *      and we need to limit them on platforms with IOMMUs.
         */
        if (raptorFlag == TRUE) {
                if (hba_map0_area_size > 128)
                        hba_map0_area_size = 128;
                if (hba_map1_area_size > 524288)
                        hba_map1_area_size = 524288;
        } else {
                if (hba_map0_area_size > 524288)
                        hba_map0_area_size = 524288;
        }
#endif

        base_addr_virt = ioremap(base_addr0_phys,hba_map0_area_size);
        if (!base_addr_virt) {
                pci_release_regions(pDev);
                PERROR("dpti: adpt_config_hba: io remap failed\n");
                return -EINVAL;
        }

        if(raptorFlag == TRUE) {
                msg_addr_virt = ioremap(base_addr1_phys, hba_map1_area_size );
                if (!msg_addr_virt) {
                        PERROR("dpti: adpt_config_hba: io remap failed on BAR1\n");
                        iounmap(base_addr_virt);
                        pci_release_regions(pDev);
                        return -EINVAL;
                }
        } else {
                msg_addr_virt = base_addr_virt;
        }
        
        // Allocate and zero the data structure
        pHba = kzalloc(sizeof(adpt_hba), GFP_KERNEL);
        if (!pHba) {
                if (msg_addr_virt != base_addr_virt)
                        iounmap(msg_addr_virt);
                iounmap(base_addr_virt);
                pci_release_regions(pDev);
                return -ENOMEM;
        }

        mutex_lock(&adpt_configuration_lock);

        if(hba_chain != NULL){
                for(p = hba_chain; p->next; p = p->next);
                p->next = pHba;
        } else {
                hba_chain = pHba;
        }
        pHba->next = NULL;
        pHba->unit = hba_count;
        sprintf(pHba->name, "dpti%d", hba_count);
        hba_count++;
        
        mutex_unlock(&adpt_configuration_lock);

        pHba->pDev = pDev;
        pHba->base_addr_phys = base_addr0_phys;

        // Set up the Virtual Base Address of the I2O Device
        pHba->base_addr_virt = base_addr_virt;
        pHba->msg_addr_virt = msg_addr_virt;
        pHba->irq_mask = base_addr_virt+0x30;
        pHba->post_port = base_addr_virt+0x40;
        pHba->reply_port = base_addr_virt+0x44;

        pHba->hrt = NULL;
        pHba->lct = NULL;
        pHba->lct_size = 0;
        pHba->status_block = NULL;
        pHba->post_count = 0;
        pHba->state = DPTI_STATE_RESET;
        pHba->pDev = pDev;
        pHba->devices = NULL;
        pHba->dma64 = dma64;

        // Initializing the spinlocks
        spin_lock_init(&pHba->state_lock);
        spin_lock_init(&adpt_post_wait_lock);

        if(raptorFlag == 0){
                printk(KERN_INFO "Adaptec I2O RAID controller"
                                 " %d at %p size=%x irq=%d%s\n", 
                        hba_count-1, base_addr_virt,
                        hba_map0_area_size, pDev->irq,
                        dma64 ? " (64-bit DMA)" : "");
        } else {
                printk(KERN_INFO"Adaptec I2O RAID controller %d irq=%d%s\n",
                        hba_count-1, pDev->irq,
                        dma64 ? " (64-bit DMA)" : "");
                printk(KERN_INFO"     BAR0 %p - size= %x\n",base_addr_virt,hba_map0_area_size);
                printk(KERN_INFO"     BAR1 %p - size= %x\n",msg_addr_virt,hba_map1_area_size);
        }

        if (request_irq (pDev->irq, adpt_isr, IRQF_SHARED, pHba->name, pHba)) {
                printk(KERN_ERR"%s: Couldn't register IRQ %d\n", pHba->name, pDev->irq);
                adpt_i2o_delete_hba(pHba);
                return -EINVAL;
        }

        return 0;
}


static void adpt_i2o_delete_hba(adpt_hba* pHba)
{
        adpt_hba* p1;
        adpt_hba* p2;
        struct i2o_device* d;
        struct i2o_device* next;
        int i;
        int j;
        struct adpt_device* pDev;
        struct adpt_device* pNext;


        mutex_lock(&adpt_configuration_lock);
        if(pHba->host){
                free_irq(pHba->host->irq, pHba);
        }
        p2 = NULL;
        for( p1 = hba_chain; p1; p2 = p1,p1=p1->next){
                if(p1 == pHba) {
                        if(p2) {
                                p2->next = p1->next;
                        } else {
                                hba_chain = p1->next;
                        }
                        break;
                }
        }

        hba_count--;
        mutex_unlock(&adpt_configuration_lock);

        iounmap(pHba->base_addr_virt);
        pci_release_regions(pHba->pDev);
        if(pHba->msg_addr_virt != pHba->base_addr_virt){
                iounmap(pHba->msg_addr_virt);
        }
        if(pHba->FwDebugBuffer_P)
                iounmap(pHba->FwDebugBuffer_P);
        if(pHba->hrt) {
                dma_free_coherent(&pHba->pDev->dev,
                        pHba->hrt->num_entries * pHba->hrt->entry_len << 2,
                        pHba->hrt, pHba->hrt_pa);
        }
        if(pHba->lct) {
                dma_free_coherent(&pHba->pDev->dev, pHba->lct_size,
                        pHba->lct, pHba->lct_pa);
        }
        if(pHba->status_block) {
                dma_free_coherent(&pHba->pDev->dev, sizeof(i2o_status_block),
                        pHba->status_block, pHba->status_block_pa);
        }
        if(pHba->reply_pool) {
                dma_free_coherent(&pHba->pDev->dev,
                        pHba->reply_fifo_size * REPLY_FRAME_SIZE * 4,
                        pHba->reply_pool, pHba->reply_pool_pa);
        }

        for(d = pHba->devices; d ; d = next){
                next = d->next;
                kfree(d);
        }
        for(i = 0 ; i < pHba->top_scsi_channel ; i++){
                for(j = 0; j < MAX_ID; j++){
                        if(pHba->channel[i].device[j] != NULL){
                                for(pDev = pHba->channel[i].device[j]; pDev; pDev = pNext){
                                        pNext = pDev->next_lun;
                                        kfree(pDev);
                                }
                        }
                }
        }
        pci_dev_put(pHba->pDev);
        if (adpt_sysfs_class)
                device_destroy(adpt_sysfs_class,
                                MKDEV(DPTI_I2O_MAJOR, pHba->unit));
        kfree(pHba);

        if(hba_count <= 0){
                unregister_chrdev(DPTI_I2O_MAJOR, DPT_DRIVER);   
                if (adpt_sysfs_class) {
                        class_destroy(adpt_sysfs_class);
                        adpt_sysfs_class = NULL;
                }
        }
}

static struct adpt_device* adpt_find_device(adpt_hba* pHba, u32 chan, u32 id, u64 lun)
{
        struct adpt_device* d;

        if (chan >= MAX_CHANNEL)
                return NULL;
        
        d = pHba->channel[chan].device[id];
        if(!d || d->tid == 0) {
                return NULL;
        }

        /* If it is the only lun at that address then this should match*/
        if(d->scsi_lun == lun){
                return d;
        }

        /* else we need to look through all the luns */
        for(d=d->next_lun ; d ; d = d->next_lun){
                if(d->scsi_lun == lun){
                        return d;
                }
        }
        return NULL;
}


static int adpt_i2o_post_wait(adpt_hba* pHba, u32* msg, int len, int timeout)
{
        // I used my own version of the WAIT_QUEUE_HEAD
        // to handle some version differences
        // When embedded in the kernel this could go back to the vanilla one
        ADPT_DECLARE_WAIT_QUEUE_HEAD(adpt_wq_i2o_post);
        int status = 0;
        ulong flags = 0;
        struct adpt_i2o_post_wait_data *p1, *p2;
        struct adpt_i2o_post_wait_data *wait_data =
                kmalloc(sizeof(struct adpt_i2o_post_wait_data), GFP_ATOMIC);
        DECLARE_WAITQUEUE(wait, current);

        if (!wait_data)
                return -ENOMEM;

        /*
         * The spin locking is needed to keep anyone from playing
         * with the queue pointers and id while we do the same
         */
        spin_lock_irqsave(&adpt_post_wait_lock, flags);
       // TODO we need a MORE unique way of getting ids
       // to support async LCT get
        wait_data->next = adpt_post_wait_queue;
        adpt_post_wait_queue = wait_data;
        adpt_post_wait_id++;
        adpt_post_wait_id &= 0x7fff;
        wait_data->id =  adpt_post_wait_id;
        spin_unlock_irqrestore(&adpt_post_wait_lock, flags);

        wait_data->wq = &adpt_wq_i2o_post;
        wait_data->status = -ETIMEDOUT;

        add_wait_queue(&adpt_wq_i2o_post, &wait);

        msg[2] |= 0x80000000 | ((u32)wait_data->id);
        timeout *= HZ;
        if((status = adpt_i2o_post_this(pHba, msg, len)) == 0){
                set_current_state(TASK_INTERRUPTIBLE);
                if(pHba->host)
                        spin_unlock_irq(pHba->host->host_lock);
                if (!timeout)
                        schedule();
                else{
                        timeout = schedule_timeout(timeout);
                        if (timeout == 0) {
                                // I/O issued, but cannot get result in
                                // specified time. Freeing resorces is
                                // dangerous.
                                status = -ETIME;
                        }
                }
                if(pHba->host)
                        spin_lock_irq(pHba->host->host_lock);
        }
        remove_wait_queue(&adpt_wq_i2o_post, &wait);

        if(status == -ETIMEDOUT){
                printk(KERN_INFO"dpti%d: POST WAIT TIMEOUT\n",pHba->unit);
                // We will have to free the wait_data memory during shutdown
                return status;
        }

        /* Remove the entry from the queue.  */
        p2 = NULL;
        spin_lock_irqsave(&adpt_post_wait_lock, flags);
        for(p1 = adpt_post_wait_queue; p1; p2 = p1, p1 = p1->next) {
                if(p1 == wait_data) {
                        if(p1->status == I2O_DETAIL_STATUS_UNSUPPORTED_FUNCTION ) {
                                status = -EOPNOTSUPP;
                        }
                        if(p2) {
                                p2->next = p1->next;
                        } else {
                                adpt_post_wait_queue = p1->next;
                        }
                        break;
                }
        }
        spin_unlock_irqrestore(&adpt_post_wait_lock, flags);

        kfree(wait_data);

        return status;
}


static s32 adpt_i2o_post_this(adpt_hba* pHba, u32* data, int len)
{

        u32 m = EMPTY_QUEUE;
        u32 __iomem *msg;
        ulong timeout = jiffies + 30*HZ;
        do {
                rmb();
                m = readl(pHba->post_port);
                if (m != EMPTY_QUEUE) {
                        break;
                }
                if(time_after(jiffies,timeout)){
                        printk(KERN_WARNING"dpti%d: Timeout waiting for message frame!\n", pHba->unit);
                        return -ETIMEDOUT;
                }
                schedule_timeout_uninterruptible(1);
        } while(m == EMPTY_QUEUE);
                
        msg = pHba->msg_addr_virt + m;
        memcpy_toio(msg, data, len);
        wmb();

        //post message
        writel(m, pHba->post_port);
        wmb();

        return 0;
}


static void adpt_i2o_post_wait_complete(u32 context, int status)
{
        struct adpt_i2o_post_wait_data *p1 = NULL;
        /*
         * We need to search through the adpt_post_wait
         * queue to see if the given message is still
         * outstanding.  If not, it means that the IOP
         * took longer to respond to the message than we
         * had allowed and timer has already expired.
         * Not much we can do about that except log
         * it for debug purposes, increase timeout, and recompile
         *
         * Lock needed to keep anyone from moving queue pointers
         * around while we're looking through them.
         */

        context &= 0x7fff;

        spin_lock(&adpt_post_wait_lock);
        for(p1 = adpt_post_wait_queue; p1; p1 = p1->next) {
                if(p1->id == context) {
                        p1->status = status;
                        spin_unlock(&adpt_post_wait_lock);
                        wake_up_interruptible(p1->wq);
                        return;
                }
        }
        spin_unlock(&adpt_post_wait_lock);
        // If this happens we lose commands that probably really completed
        printk(KERN_DEBUG"dpti: Could Not find task %d in wait queue\n",context);
        printk(KERN_DEBUG"      Tasks in wait queue:\n");
        for(p1 = adpt_post_wait_queue; p1; p1 = p1->next) {
                printk(KERN_DEBUG"           %d\n",p1->id);
        }
        return;
}

static s32 adpt_i2o_reset_hba(adpt_hba* pHba)                   
{
        u32 msg[8];
        u8* status;
        dma_addr_t addr;
        u32 m = EMPTY_QUEUE ;
        ulong timeout = jiffies + (TMOUT_IOPRESET*HZ);

        if(pHba->initialized  == FALSE) {       // First time reset should be quick
                timeout = jiffies + (25*HZ);
        } else {
                adpt_i2o_quiesce_hba(pHba);
        }

        do {
                rmb();
                m = readl(pHba->post_port);
                if (m != EMPTY_QUEUE) {
                        break;
                }
                if(time_after(jiffies,timeout)){
                        printk(KERN_WARNING"Timeout waiting for message!\n");
                        return -ETIMEDOUT;
                }
                schedule_timeout_uninterruptible(1);
        } while (m == EMPTY_QUEUE);

        status = dma_alloc_coherent(&pHba->pDev->dev, 4, &addr, GFP_KERNEL);
        if(status == NULL) {
                adpt_send_nop(pHba, m);
                printk(KERN_ERR"IOP reset failed - no free memory.\n");
                return -ENOMEM;
        }

        msg[0]=EIGHT_WORD_MSG_SIZE|SGL_OFFSET_0;
        msg[1]=I2O_CMD_ADAPTER_RESET<<24|HOST_TID<<12|ADAPTER_TID;
        msg[2]=0;
        msg[3]=0;
        msg[4]=0;
        msg[5]=0;
        msg[6]=dma_low(addr);
        msg[7]=dma_high(addr);

        memcpy_toio(pHba->msg_addr_virt+m, msg, sizeof(msg));
        wmb();
        writel(m, pHba->post_port);
        wmb();

        while(*status == 0){
                if(time_after(jiffies,timeout)){
                        printk(KERN_WARNING"%s: IOP Reset Timeout\n",pHba->name);
                        /* We lose 4 bytes of "status" here, but we cannot
                           free these because controller may awake and corrupt
                           those bytes at any time */
                        /* dma_free_coherent(&pHba->pDev->dev, 4, buf, addr); */
                        return -ETIMEDOUT;
                }
                rmb();
                schedule_timeout_uninterruptible(1);
        }

        if(*status == 0x01 /*I2O_EXEC_IOP_RESET_IN_PROGRESS*/) {
                PDEBUG("%s: Reset in progress...\n", pHba->name);
                // Here we wait for message frame to become available
                // indicated that reset has finished
                do {
                        rmb();
                        m = readl(pHba->post_port);
                        if (m != EMPTY_QUEUE) {
                                break;
                        }
                        if(time_after(jiffies,timeout)){
                                printk(KERN_ERR "%s:Timeout waiting for IOP Reset.\n",pHba->name);
                                /* We lose 4 bytes of "status" here, but we
                                   cannot free these because controller may
                                   awake and corrupt those bytes at any time */
                                /* dma_free_coherent(&pHba->pDev->dev, 4, buf, addr); */
                                return -ETIMEDOUT;
                        }
                        schedule_timeout_uninterruptible(1);
                } while (m == EMPTY_QUEUE);
                // Flush the offset
                adpt_send_nop(pHba, m);
        }
        adpt_i2o_status_get(pHba);
        if(*status == 0x02 ||
                        pHba->status_block->iop_state != ADAPTER_STATE_RESET) {
                printk(KERN_WARNING"%s: Reset reject, trying to clear\n",
                                pHba->name);
        } else {
                PDEBUG("%s: Reset completed.\n", pHba->name);
        }

        dma_free_coherent(&pHba->pDev->dev, 4, status, addr);
#ifdef UARTDELAY
        // This delay is to allow someone attached to the card through the debug UART to 
        // set up the dump levels that they want before the rest of the initialization sequence
        adpt_delay(20000);
#endif
        return 0;
}


static int adpt_i2o_parse_lct(adpt_hba* pHba)
{
        int i;
        int max;
        int tid;
        struct i2o_device *d;
        i2o_lct *lct = pHba->lct;
        u8 bus_no = 0;
        s16 scsi_id;
        u64 scsi_lun;
        u32 buf[10]; // larger than 7, or 8 ...
        struct adpt_device* pDev; 
        
        if (lct == NULL) {
                printk(KERN_ERR "%s: LCT is empty???\n",pHba->name);
                return -1;
        }
        
        max = lct->table_size;  
        max -= 3;
        max /= 9;

        for(i=0;i<max;i++) {
                if( lct->lct_entry[i].user_tid != 0xfff){
                        /*
                         * If we have hidden devices, we need to inform the upper layers about
                         * the possible maximum id reference to handle device access when
                         * an array is disassembled. This code has no other purpose but to
                         * allow us future access to devices that are currently hidden
                         * behind arrays, hotspares or have not been configured (JBOD mode).
                         */
                        if( lct->lct_entry[i].class_id != I2O_CLASS_RANDOM_BLOCK_STORAGE &&
                            lct->lct_entry[i].class_id != I2O_CLASS_SCSI_PERIPHERAL &&
                            lct->lct_entry[i].class_id != I2O_CLASS_FIBRE_CHANNEL_PERIPHERAL ){
                                continue;
                        }
                        tid = lct->lct_entry[i].tid;
                        // I2O_DPT_DEVICE_INFO_GROUP_NO;
                        if(adpt_i2o_query_scalar(pHba, tid, 0x8000, -1, buf, 32)<0) {
                                continue;
                        }
                        bus_no = buf[0]>>16;
                        scsi_id = buf[1];
                        scsi_lun = scsilun_to_int((struct scsi_lun *)&buf[2]);
                        if(bus_no >= MAX_CHANNEL) {     // Something wrong skip it
                                printk(KERN_WARNING"%s: Channel number %d out of range \n", pHba->name, bus_no);
                                continue;
                        }
                        if (scsi_id >= MAX_ID){
                                printk(KERN_WARNING"%s: SCSI ID %d out of range \n", pHba->name, bus_no);
                                continue;
                        }
                        if(bus_no > pHba->top_scsi_channel){
                                pHba->top_scsi_channel = bus_no;
                        }
                        if(scsi_id > pHba->top_scsi_id){
                                pHba->top_scsi_id = scsi_id;
                        }
                        if(scsi_lun > pHba->top_scsi_lun){
                                pHba->top_scsi_lun = scsi_lun;
                        }
                        continue;
                }
                d = kmalloc(sizeof(struct i2o_device), GFP_KERNEL);
                if(d==NULL)
                {
                        printk(KERN_CRIT"%s: Out of memory for I2O device data.\n",pHba->name);
                        return -ENOMEM;
                }
                
                d->controller = pHba;
                d->next = NULL;

                memcpy(&d->lct_data, &lct->lct_entry[i], sizeof(i2o_lct_entry));

                d->flags = 0;
                tid = d->lct_data.tid;
                adpt_i2o_report_hba_unit(pHba, d);
                adpt_i2o_install_device(pHba, d);
        }
        bus_no = 0;
        for(d = pHba->devices; d ; d = d->next) {
                if(d->lct_data.class_id  == I2O_CLASS_BUS_ADAPTER_PORT ||
                   d->lct_data.class_id  == I2O_CLASS_FIBRE_CHANNEL_PORT){
                        tid = d->lct_data.tid;
                        // TODO get the bus_no from hrt-but for now they are in order
                        //bus_no = 
                        if(bus_no > pHba->top_scsi_channel){
                                pHba->top_scsi_channel = bus_no;
                        }
                        pHba->channel[bus_no].type = d->lct_data.class_id;
                        pHba->channel[bus_no].tid = tid;
                        if(adpt_i2o_query_scalar(pHba, tid, 0x0200, -1, buf, 28)>=0)
                        {
                                pHba->channel[bus_no].scsi_id = buf[1];
                                PDEBUG("Bus %d - SCSI ID %d.\n", bus_no, buf[1]);
                        }
                        // TODO remove - this is just until we get from hrt
                        bus_no++;
                        if(bus_no >= MAX_CHANNEL) {     // Something wrong skip it
                                printk(KERN_WARNING"%s: Channel number %d out of range - LCT\n", pHba->name, bus_no);
                                break;
                        }
                }
        }

        // Setup adpt_device table
        for(d = pHba->devices; d ; d = d->next) {
                if(d->lct_data.class_id  == I2O_CLASS_RANDOM_BLOCK_STORAGE ||
                   d->lct_data.class_id  == I2O_CLASS_SCSI_PERIPHERAL ||
                   d->lct_data.class_id  == I2O_CLASS_FIBRE_CHANNEL_PERIPHERAL ){

                        tid = d->lct_data.tid;
                        scsi_id = -1;
                        // I2O_DPT_DEVICE_INFO_GROUP_NO;
                        if(adpt_i2o_query_scalar(pHba, tid, 0x8000, -1, buf, 32)>=0) {
                                bus_no = buf[0]>>16;
                                scsi_id = buf[1];
                                scsi_lun = scsilun_to_int((struct scsi_lun *)&buf[2]);
                                if(bus_no >= MAX_CHANNEL) {     // Something wrong skip it
                                        continue;
                                }
                                if (scsi_id >= MAX_ID) {
                                        continue;
                                }
                                if( pHba->channel[bus_no].device[scsi_id] == NULL){
                                        pDev =  kzalloc(sizeof(struct adpt_device),GFP_KERNEL);
                                        if(pDev == NULL) {
                                                return -ENOMEM;
                                        }
                                        pHba->channel[bus_no].device[scsi_id] = pDev;
                                } else {
                                        for( pDev = pHba->channel[bus_no].device[scsi_id];      
                                                        pDev->next_lun; pDev = pDev->next_lun){
                                        }
                                        pDev->next_lun = kzalloc(sizeof(struct adpt_device),GFP_KERNEL);
                                        if(pDev->next_lun == NULL) {
                                                return -ENOMEM;
                                        }
                                        pDev = pDev->next_lun;
                                }
                                pDev->tid = tid;
                                pDev->scsi_channel = bus_no;
                                pDev->scsi_id = scsi_id;
                                pDev->scsi_lun = scsi_lun;
                                pDev->pI2o_dev = d;
                                d->owner = pDev;
                                pDev->type = (buf[0])&0xff;
                                pDev->flags = (buf[0]>>8)&0xff;
                                if(scsi_id > pHba->top_scsi_id){
                                        pHba->top_scsi_id = scsi_id;
                                }
                                if(scsi_lun > pHba->top_scsi_lun){
                                        pHba->top_scsi_lun = scsi_lun;
                                }
                        }
                        if(scsi_id == -1){
                                printk(KERN_WARNING"Could not find SCSI ID for %s\n",
                                                d->lct_data.identity_tag);
                        }
                }
        }
        return 0;
}


/*
 *      Each I2O controller has a chain of devices on it - these match
 *      the useful parts of the LCT of the board.
 */
 
static int adpt_i2o_install_device(adpt_hba* pHba, struct i2o_device *d)
{
        mutex_lock(&adpt_configuration_lock);
        d->controller=pHba;
        d->owner=NULL;
        d->next=pHba->devices;
        d->prev=NULL;
        if (pHba->devices != NULL){
                pHba->devices->prev=d;
        }
        pHba->devices=d;
        *d->dev_name = 0;

        mutex_unlock(&adpt_configuration_lock);
        return 0;
}

static int adpt_open(struct inode *inode, struct file *file)
{
        int minor;
        adpt_hba* pHba;

        mutex_lock(&adpt_mutex);
        //TODO check for root access
        //
        minor = iminor(inode);
        if (minor >= hba_count) {
                mutex_unlock(&adpt_mutex);
                return -ENXIO;
        }
        mutex_lock(&adpt_configuration_lock);
        for (pHba = hba_chain; pHba; pHba = pHba->next) {
                if (pHba->unit == minor) {
                        break;  /* found adapter */
                }
        }
        if (pHba == NULL) {
                mutex_unlock(&adpt_configuration_lock);
                mutex_unlock(&adpt_mutex);
                return -ENXIO;
        }

//      if(pHba->in_use){
        //      mutex_unlock(&adpt_configuration_lock);
//              return -EBUSY;
//      }

        pHba->in_use = 1;
        mutex_unlock(&adpt_configuration_lock);
        mutex_unlock(&adpt_mutex);

        return 0;
}

static int adpt_close(struct inode *inode, struct file *file)
{
        int minor;
        adpt_hba* pHba;

        minor = iminor(inode);
        if (minor >= hba_count) {
                return -ENXIO;
        }
        mutex_lock(&adpt_configuration_lock);
        for (pHba = hba_chain; pHba; pHba = pHba->next) {
                if (pHba->unit == minor) {
                        break;  /* found adapter */
                }
        }
        mutex_unlock(&adpt_configuration_lock);
        if (pHba == NULL) {
                return -ENXIO;
        }

        pHba->in_use = 0;

        return 0;
}


static int adpt_i2o_passthru(adpt_hba* pHba, u32 __user *arg)
{
        u32 msg[MAX_MESSAGE_SIZE];
        u32* reply = NULL;
        u32 size = 0;
        u32 reply_size = 0;
        u32 __user *user_msg = arg;
        u32 __user * user_reply = NULL;
        void **sg_list = NULL;
        u32 sg_offset = 0;
        u32 sg_count = 0;
        int sg_index = 0;
        u32 i = 0;
        u32 rcode = 0;
        void *p = NULL;
        dma_addr_t addr;
        ulong flags = 0;

        memset(&msg, 0, MAX_MESSAGE_SIZE*4);
        // get user msg size in u32s 
        if(get_user(size, &user_msg[0])){
                return -EFAULT;
        }
        size = size>>16;

        user_reply = &user_msg[size];
        if(size > MAX_MESSAGE_SIZE){
                return -EFAULT;
        }
        size *= 4; // Convert to bytes

        /* Copy in the user's I2O command */
        if(copy_from_user(msg, user_msg, size)) {
                return -EFAULT;
        }
        get_user(reply_size, &user_reply[0]);
        reply_size = reply_size>>16;
        if(reply_size > REPLY_FRAME_SIZE){
                reply_size = REPLY_FRAME_SIZE;
        }
        reply_size *= 4;
        reply = kzalloc(REPLY_FRAME_SIZE*4, GFP_KERNEL);
        if(reply == NULL) {
                printk(KERN_WARNING"%s: Could not allocate reply buffer\n",pHba->name);
                return -ENOMEM;
        }
        sg_offset = (msg[0]>>4)&0xf;
        msg[2] = 0x40000000; // IOCTL context
        msg[3] = adpt_ioctl_to_context(pHba, reply);
        if (msg[3] == (u32)-1) {
                rcode = -EBUSY;
                goto free;
        }

        sg_list = kcalloc(pHba->sg_tablesize, sizeof(*sg_list), GFP_KERNEL);
        if (!sg_list) {
                rcode = -ENOMEM;
                goto free;
        }
        if(sg_offset) {
                // TODO add 64 bit API
                struct sg_simple_element *sg =  (struct sg_simple_element*) (msg+sg_offset);
                sg_count = (size - sg_offset*4) / sizeof(struct sg_simple_element);
                if (sg_count > pHba->sg_tablesize){
                        printk(KERN_DEBUG"%s:IOCTL SG List too large (%u)\n", pHba->name,sg_count);
                        rcode = -EINVAL;
                        goto free;
                }

                for(i = 0; i < sg_count; i++) {
                        int sg_size;

                        if (!(sg[i].flag_count & 0x10000000 /*I2O_SGL_FLAGS_SIMPLE_ADDRESS_ELEMENT*/)) {
                                printk(KERN_DEBUG"%s:Bad SG element %d - not simple (%x)\n",pHba->name,i,  sg[i].flag_count);
                                rcode = -EINVAL;
                                goto cleanup;
                        }
                        sg_size = sg[i].flag_count & 0xffffff;      
                        /* Allocate memory for the transfer */
                        p = dma_alloc_coherent(&pHba->pDev->dev, sg_size, &addr, GFP_KERNEL);
                        if(!p) {
                                printk(KERN_DEBUG"%s: Could not allocate SG buffer - size = %d buffer number %d of %d\n",
                                                pHba->name,sg_size,i,sg_count);
                                rcode = -ENOMEM;
                                goto cleanup;
                        }
                        sg_list[sg_index++] = p; // sglist indexed with input frame, not our internal frame.
                        /* Copy in the user's SG buffer if necessary */
                        if(sg[i].flag_count & 0x04000000 /*I2O_SGL_FLAGS_DIR*/) {
                                // sg_simple_element API is 32 bit
                                if (copy_from_user(p,(void __user *)(ulong)sg[i].addr_bus, sg_size)) {
                                        printk(KERN_DEBUG"%s: Could not copy SG buf %d FROM user\n",pHba->name,i);
                                        rcode = -EFAULT;
                                        goto cleanup;
                                }
                        }
                        /* sg_simple_element API is 32 bit, but addr < 4GB */
                        sg[i].addr_bus = addr;
                }
        }

        do {
                /*
                 * Stop any new commands from enterring the
                 * controller while processing the ioctl
                 */
                if (pHba->host) {
                        scsi_block_requests(pHba->host);
                        spin_lock_irqsave(pHba->host->host_lock, flags);
                }
                rcode = adpt_i2o_post_wait(pHba, msg, size, FOREVER);
                if (rcode != 0)
                        printk("adpt_i2o_passthru: post wait failed %d %p\n",
                                        rcode, reply);
                if (pHba->host) {
                        spin_unlock_irqrestore(pHba->host->host_lock, flags);
                        scsi_unblock_requests(pHba->host);
                }
        } while (rcode == -ETIMEDOUT);

        if(rcode){
                goto cleanup;
        }

        if(sg_offset) {
        /* Copy back the Scatter Gather buffers back to user space */
                u32 j;
                // TODO add 64 bit API
                struct sg_simple_element* sg;
                int sg_size;

                // re-acquire the original message to handle correctly the sg copy operation
                memset(&msg, 0, MAX_MESSAGE_SIZE*4); 
                // get user msg size in u32s 
                if(get_user(size, &user_msg[0])){
                        rcode = -EFAULT; 
                        goto cleanup; 
                }
                size = size>>16;
                size *= 4;
                if (size > MAX_MESSAGE_SIZE) {
                        rcode = -EINVAL;
                        goto cleanup;
                }
                /* Copy in the user's I2O command */
                if (copy_from_user (msg, user_msg, size)) {
                        rcode = -EFAULT;
                        goto cleanup;
                }
                sg_count = (size - sg_offset*4) / sizeof(struct sg_simple_element);

                // TODO add 64 bit API
                sg       = (struct sg_simple_element*)(msg + sg_offset);
                for (j = 0; j < sg_count; j++) {
                        /* Copy out the SG list to user's buffer if necessary */
                        if(! (sg[j].flag_count & 0x4000000 /*I2O_SGL_FLAGS_DIR*/)) {
                                sg_size = sg[j].flag_count & 0xffffff; 
                                // sg_simple_element API is 32 bit
                                if (copy_to_user((void __user *)(ulong)sg[j].addr_bus,sg_list[j], sg_size)) {
                                        printk(KERN_WARNING"%s: Could not copy %p TO user %x\n",pHba->name, sg_list[j], sg[j].addr_bus);
                                        rcode = -EFAULT;
                                        goto cleanup;
                                }
                        }
                }
        } 

        /* Copy back the reply to user space */
        if (reply_size) {
                // we wrote our own values for context - now restore the user supplied ones
                if(copy_from_user(reply+2, user_msg+2, sizeof(u32)*2)) {
                        printk(KERN_WARNING"%s: Could not copy message context FROM user\n",pHba->name);
                        rcode = -EFAULT;
                }
                if(copy_to_user(user_reply, reply, reply_size)) {
                        printk(KERN_WARNING"%s: Could not copy reply TO user\n",pHba->name);
                        rcode = -EFAULT;
                }
        }


cleanup:
        if (rcode != -ETIME && rcode != -EINTR) {
                struct sg_simple_element *sg =
                                (struct sg_simple_element*) (msg +sg_offset);
                while(sg_index) {
                        if(sg_list[--sg_index]) {
                                dma_free_coherent(&pHba->pDev->dev,
                                        sg[sg_index].flag_count & 0xffffff,
                                        sg_list[sg_index],
                                        sg[sg_index].addr_bus);
                        }
                }
        }

free:
        kfree(sg_list);
        kfree(reply);
        return rcode;
}

#if defined __ia64__ 
static void adpt_ia64_info(sysInfo_S* si)
{
        // This is all the info we need for now
        // We will add more info as our new
        // managmenent utility requires it
        si->processorType = PROC_IA64;
}
#endif

#if defined __sparc__ 
static void adpt_sparc_info(sysInfo_S* si)
{
        // This is all the info we need for now
        // We will add more info as our new
        // managmenent utility requires it
        si->processorType = PROC_ULTRASPARC;
}
#endif
#if defined __alpha__ 
static void adpt_alpha_info(sysInfo_S* si)
{
        // This is all the info we need for now
        // We will add more info as our new
        // managmenent utility requires it
        si->processorType = PROC_ALPHA;
}
#endif

#if defined __i386__

#include <uapi/asm/vm86.h>

static void adpt_i386_info(sysInfo_S* si)
{
        // This is all the info we need for now
        // We will add more info as our new
        // managmenent utility requires it
        switch (boot_cpu_data.x86) {
        case CPU_386:
                si->processorType = PROC_386;
                break;
        case CPU_486:
                si->processorType = PROC_486;
                break;
        case CPU_586:
                si->processorType = PROC_PENTIUM;
                break;
        default:  // Just in case 
                si->processorType = PROC_PENTIUM;
                break;
        }
}
#endif

/*
 * This routine returns information about the system.  This does not effect
 * any logic and if the info is wrong - it doesn't matter.
 */

/* Get all the info we can not get from kernel services */
static int adpt_system_info(void __user *buffer)
{
        sysInfo_S si;

        memset(&si, 0, sizeof(si));

        si.osType = OS_LINUX;
        si.osMajorVersion = 0;
        si.osMinorVersion = 0;
        si.osRevision = 0;
        si.busType = SI_PCI_BUS;
        si.processorFamily = DPTI_sig.dsProcessorFamily;

#if defined __i386__
        adpt_i386_info(&si);
#elif defined (__ia64__)
        adpt_ia64_info(&si);
#elif defined(__sparc__)
        adpt_sparc_info(&si);
#elif defined (__alpha__)
        adpt_alpha_info(&si);
#else
        si.processorType = 0xff ;
#endif
        if (copy_to_user(buffer, &si, sizeof(si))){
                printk(KERN_WARNING"dpti: Could not copy buffer TO user\n");
                return -EFAULT;
        }

        return 0;
}

static int adpt_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
{
        int minor;
        int error = 0;
        adpt_hba* pHba;
        ulong flags = 0;
        void __user *argp = (void __user *)arg;

        minor = iminor(inode);
        if (minor >= DPTI_MAX_HBA){
                return -ENXIO;
        }
        mutex_lock(&adpt_configuration_lock);
        for (pHba = hba_chain; pHba; pHba = pHba->next) {
                if (pHba->unit == minor) {
                        break;  /* found adapter */
                }
        }
        mutex_unlock(&adpt_configuration_lock);
        if(pHba == NULL){
                return -ENXIO;
        }

        while((volatile u32) pHba->state & DPTI_STATE_RESET )
                schedule_timeout_uninterruptible(2);

        switch (cmd) {
        // TODO: handle 3 cases
        case DPT_SIGNATURE:
                if (copy_to_user(argp, &DPTI_sig, sizeof(DPTI_sig))) {
                        return -EFAULT;
                }
                break;
        case I2OUSRCMD:
                return adpt_i2o_passthru(pHba, argp);

        case DPT_CTRLINFO:{
                drvrHBAinfo_S HbaInfo;

#define FLG_OSD_PCI_VALID 0x0001
#define FLG_OSD_DMA       0x0002
#define FLG_OSD_I2O       0x0004
                memset(&HbaInfo, 0, sizeof(HbaInfo));
                HbaInfo.drvrHBAnum = pHba->unit;
                HbaInfo.baseAddr = (ulong) pHba->base_addr_phys;
                HbaInfo.blinkState = adpt_read_blink_led(pHba);
                HbaInfo.pciBusNum =  pHba->pDev->bus->number;
                HbaInfo.pciDeviceNum=PCI_SLOT(pHba->pDev->devfn); 
                HbaInfo.Interrupt = pHba->pDev->irq; 
                HbaInfo.hbaFlags = FLG_OSD_PCI_VALID | FLG_OSD_DMA | FLG_OSD_I2O;
                if(copy_to_user(argp, &HbaInfo, sizeof(HbaInfo))){
                        printk(KERN_WARNING"%s: Could not copy HbaInfo TO user\n",pHba->name);
                        return -EFAULT;
                }
                break;
                }

        case DPT_SYSINFO:
                return adpt_system_info(argp);
        case DPT_BLINKLED:{
                u32 value;
                value = (u32)adpt_read_blink_led(pHba);
                if (copy_to_user(argp, &value, sizeof(value))) {
                        return -EFAULT;
                }
                break;
                }
        case I2ORESETCMD: {
                struct Scsi_Host *shost = pHba->host;

                if (shost)
                        spin_lock_irqsave(shost->host_lock, flags);
                adpt_hba_reset(pHba);
                if (shost)
                        spin_unlock_irqrestore(shost->host_lock, flags);
                break;
        }
        case I2ORESCANCMD:
                adpt_rescan(pHba);
                break;
        default:
                return -EINVAL;
        }

        return error;
}

static long adpt_unlocked_ioctl(struct file *file, uint cmd, ulong arg)
{
        struct inode *inode;
        long ret;
 
        inode = file_inode(file);
 
        mutex_lock(&adpt_mutex);
        ret = adpt_ioctl(inode, file, cmd, arg);
        mutex_unlock(&adpt_mutex);

        return ret;
}

#ifdef CONFIG_COMPAT
static long compat_adpt_ioctl(struct file *file,
                                unsigned int cmd, unsigned long arg)
{
        struct inode *inode;
        long ret;
 
        inode = file_inode(file);
 
        mutex_lock(&adpt_mutex);
 
        switch(cmd) {
                case DPT_SIGNATURE:
                case I2OUSRCMD:
                case DPT_CTRLINFO:
                case DPT_SYSINFO:
                case DPT_BLINKLED:
                case I2ORESETCMD:
                case I2ORESCANCMD:
                case (DPT_TARGET_BUSY & 0xFFFF):
                case DPT_TARGET_BUSY:
                        ret = adpt_ioctl(inode, file, cmd, arg);
                        break;
                default:
                        ret =  -ENOIOCTLCMD;
        }
 
        mutex_unlock(&adpt_mutex);
 
        return ret;
}
#endif

static irqreturn_t adpt_isr(int irq, void *dev_id)
{
        struct scsi_cmnd* cmd;
        adpt_hba* pHba = dev_id;
        u32 m;
        void __iomem *reply;
        u32 status=0;
        u32 context;
        ulong flags = 0;
        int handled = 0;

        if (pHba == NULL){
                printk(KERN_WARNING"adpt_isr: NULL dev_id\n");
                return IRQ_NONE;
        }
        if(pHba->host)
                spin_lock_irqsave(pHba->host->host_lock, flags);

        while( readl(pHba->irq_mask) & I2O_INTERRUPT_PENDING_B) {
                m = readl(pHba->reply_port);
                if(m == EMPTY_QUEUE){
                        // Try twice then give up
                        rmb();
                        m = readl(pHba->reply_port);
                        if(m == EMPTY_QUEUE){ 
                                // This really should not happen
                                printk(KERN_ERR"dpti: Could not get reply frame\n");
                                goto out;
                        }
                }
                if (pHba->reply_pool_pa <= m &&
                    m < pHba->reply_pool_pa +
                        (pHba->reply_fifo_size * REPLY_FRAME_SIZE * 4)) {
                        reply = (u8 *)pHba->reply_pool +
                                                (m - pHba->reply_pool_pa);
                } else {
                        /* Ick, we should *never* be here */
                        printk(KERN_ERR "dpti: reply frame not from pool\n");
                        reply = (u8 *)bus_to_virt(m);
                }

                if (readl(reply) & MSG_FAIL) {
                        u32 old_m = readl(reply+28); 
                        void __iomem *msg;
                        u32 old_context;
                        PDEBUG("%s: Failed message\n",pHba->name);
                        if(old_m >= 0x100000){
                                printk(KERN_ERR"%s: Bad preserved MFA (%x)- dropping frame\n",pHba->name,old_m);
                                writel(m,pHba->reply_port);
                                continue;
                        }
                        // Transaction context is 0 in failed reply frame
                        msg = pHba->msg_addr_virt + old_m;
                        old_context = readl(msg+12);
                        writel(old_context, reply+12);
                        adpt_send_nop(pHba, old_m);
                } 
                context = readl(reply+8);
                if(context & 0x40000000){ // IOCTL
                        void *p = adpt_ioctl_from_context(pHba, readl(reply+12));
                        if( p != NULL) {
                                memcpy_fromio(p, reply, REPLY_FRAME_SIZE * 4);
                        }
                        // All IOCTLs will also be post wait
                }
                if(context & 0x80000000){ // Post wait message
                        status = readl(reply+16);
                        if(status  >> 24){
                                status &=  0xffff; /* Get detail status */
                        } else {
                                status = I2O_POST_WAIT_OK;
                        }
                        if(!(context & 0x40000000)) {
                                /*
                                 * The request tag is one less than the command tag
                                 * as the firmware might treat a 0 tag as invalid
                                 */
                                cmd = scsi_host_find_tag(pHba->host,
                                                         readl(reply + 12) - 1);
                                if(cmd != NULL) {
                                        printk(KERN_WARNING"%s: Apparent SCSI cmd in Post Wait Context - cmd=%p context=%x\n", pHba->name, cmd, context);
                                }
                        }
                        adpt_i2o_post_wait_complete(context, status);
                } else { // SCSI message
                        /*
                         * The request tag is one less than the command tag
                         * as the firmware might treat a 0 tag as invalid
                         */
                        cmd = scsi_host_find_tag(pHba->host,
                                                 readl(reply + 12) - 1);
                        if(cmd != NULL){
                                scsi_dma_unmap(cmd);
                                adpt_i2o_scsi_complete(reply, cmd);
                        }
                }
                writel(m, pHba->reply_port);
                wmb();
                rmb();
        }
        handled = 1;
out:    if(pHba->host)
                spin_unlock_irqrestore(pHba->host->host_lock, flags);
        return IRQ_RETVAL(handled);
}

static s32 adpt_scsi_to_i2o(adpt_hba* pHba, struct scsi_cmnd* cmd, struct adpt_device* d)
{
        int i;
        u32 msg[MAX_MESSAGE_SIZE];
        u32* mptr;
        u32* lptr;
        u32 *lenptr;
        int direction;
        int scsidir;
        int nseg;
        u32 len;
        u32 reqlen;
        s32 rcode;
        dma_addr_t addr;

        memset(msg, 0 , sizeof(msg));
        len = scsi_bufflen(cmd);
        direction = 0x00000000; 
        
        scsidir = 0x00000000;                   // DATA NO XFER
        if(len) {
                /*
                 * Set SCBFlags to indicate if data is being transferred
                 * in or out, or no data transfer
                 * Note:  Do not have to verify index is less than 0 since
                 * cmd->cmnd[0] is an unsigned char
                 */
                switch(cmd->sc_data_direction){
                case DMA_FROM_DEVICE:
                        scsidir  =0x40000000;   // DATA IN  (iop<--dev)
                        break;
                case DMA_TO_DEVICE:
                        direction=0x04000000;   // SGL OUT
                        scsidir  =0x80000000;   // DATA OUT (iop-->dev)
                        break;
                case DMA_NONE:
                        break;
                case DMA_BIDIRECTIONAL:
                        scsidir  =0x40000000;   // DATA IN  (iop<--dev)
                        // Assume In - and continue;
                        break;
                default:
                        printk(KERN_WARNING"%s: scsi opcode 0x%x not supported.\n",
                             pHba->name, cmd->cmnd[0]);
                        cmd->result = (DID_ERROR <<16);
                        scsi_done(cmd);
                        return  0;
                }
        }
        // msg[0] is set later
        // I2O_CMD_SCSI_EXEC
        msg[1] = ((0xff<<24)|(HOST_TID<<12)|d->tid);
        msg[2] = 0;
        /* Add 1 to avoid firmware treating it as invalid command */
        msg[3] = scsi_cmd_to_rq(cmd)->tag + 1;
        // Our cards use the transaction context as the tag for queueing
        // Adaptec/DPT Private stuff 
        msg[4] = I2O_CMD_SCSI_EXEC|(DPT_ORGANIZATION_ID<<16);
        msg[5] = d->tid;
        /* Direction, disconnect ok | sense data | simple queue , CDBLen */
        // I2O_SCB_FLAG_ENABLE_DISCONNECT | 
        // I2O_SCB_FLAG_SIMPLE_QUEUE_TAG | 
        // I2O_SCB_FLAG_SENSE_DATA_IN_MESSAGE;
        msg[6] = scsidir|0x20a00000|cmd->cmd_len;

        mptr=msg+7;

        // Write SCSI command into the message - always 16 byte block 
        memset(mptr, 0,  16);
        memcpy(mptr, cmd->cmnd, cmd->cmd_len);
        mptr+=4;
        lenptr=mptr++;          /* Remember me - fill in when we know */
        if (dpt_dma64(pHba)) {
                reqlen = 16;            // SINGLE SGE
                *mptr++ = (0x7C<<24)+(2<<16)+0x02; /* Enable 64 bit */
                *mptr++ = 1 << PAGE_SHIFT;
        } else {
                reqlen = 14;            // SINGLE SGE
        }
        /* Now fill in the SGList and command */

        nseg = scsi_dma_map(cmd);
        BUG_ON(nseg < 0);
        if (nseg) {
                struct scatterlist *sg;

                len = 0;
                scsi_for_each_sg(cmd, sg, nseg, i) {
                        lptr = mptr;
                        *mptr++ = direction|0x10000000|sg_dma_len(sg);
                        len+=sg_dma_len(sg);
                        addr = sg_dma_address(sg);
                        *mptr++ = dma_low(addr);
                        if (dpt_dma64(pHba))
                                *mptr++ = dma_high(addr);
                        /* Make this an end of list */
                        if (i == nseg - 1)
                                *lptr = direction|0xD0000000|sg_dma_len(sg);
                }
                reqlen = mptr - msg;
                *lenptr = len;
                
                if(cmd->underflow && len != cmd->underflow){
                        printk(KERN_WARNING"Cmd len %08X Cmd underflow %08X\n",
                                len, cmd->underflow);
                }
        } else {
                *lenptr = len = 0;
                reqlen = 12;
        }
        
        /* Stick the headers on */
        msg[0] = reqlen<<16 | ((reqlen > 12) ? SGL_OFFSET_12 : SGL_OFFSET_0);
        
        // Send it on it's way
        rcode = adpt_i2o_post_this(pHba, msg, reqlen<<2);
        if (rcode == 0) {
                return 0;
        }
        return rcode;
}


static s32 adpt_scsi_host_alloc(adpt_hba* pHba, struct scsi_host_template *sht)
{
        struct Scsi_Host *host;

        host = scsi_host_alloc(sht, sizeof(adpt_hba*));
        if (host == NULL) {
                printk("%s: scsi_host_alloc returned NULL\n", pHba->name);
                return -1;
        }
        host->hostdata[0] = (unsigned long)pHba;
        pHba->host = host;

        host->irq = pHba->pDev->irq;
        /* no IO ports, so don't have to set host->io_port and
         * host->n_io_port
         */
        host->io_port = 0;
        host->n_io_port = 0;
                                /* see comments in scsi_host.h */
        host->max_id = 16;
        host->max_lun = 256;
        host->max_channel = pHba->top_scsi_channel + 1;
        host->cmd_per_lun = 1;
        host->unique_id = (u32)sys_tbl_pa + pHba->unit;
        host->sg_tablesize = pHba->sg_tablesize;
        host->can_queue = pHba->post_fifo_size;

        return 0;
}


static void adpt_i2o_scsi_complete(void __iomem *reply, struct scsi_cmnd *cmd)
{
        adpt_hba* pHba;
        u32 hba_status;
        u32 dev_status;
        u32 reply_flags = readl(reply) & 0xff00; // Leave it shifted up 8 bits 
        // I know this would look cleaner if I just read bytes
        // but the model I have been using for all the rest of the
        // io is in 4 byte words - so I keep that model
        u16 detailed_status = readl(reply+16) &0xffff;
        dev_status = (detailed_status & 0xff);
        hba_status = detailed_status >> 8;

        // calculate resid for sg 
        scsi_set_resid(cmd, scsi_bufflen(cmd) - readl(reply+20));

        pHba = (adpt_hba*) cmd->device->host->hostdata[0];

        cmd->sense_buffer[0] = '\0';  // initialize sense valid flag to false

        if(!(reply_flags & MSG_FAIL)) {
                switch(detailed_status & I2O_SCSI_DSC_MASK) {
                case I2O_SCSI_DSC_SUCCESS:
                        cmd->result = (DID_OK << 16);
                        // handle underflow
                        if (readl(reply+20) < cmd->underflow) {
                                cmd->result = (DID_ERROR <<16);
                                printk(KERN_WARNING"%s: SCSI CMD underflow\n",pHba->name);
                        }
                        break;
                case I2O_SCSI_DSC_REQUEST_ABORTED:
                        cmd->result = (DID_ABORT << 16);
                        break;
                case I2O_SCSI_DSC_PATH_INVALID:
                case I2O_SCSI_DSC_DEVICE_NOT_PRESENT:
                case I2O_SCSI_DSC_SELECTION_TIMEOUT:
                case I2O_SCSI_DSC_COMMAND_TIMEOUT:
                case I2O_SCSI_DSC_NO_ADAPTER:
                case I2O_SCSI_DSC_RESOURCE_UNAVAILABLE:
                        printk(KERN_WARNING"%s: SCSI Timeout-Device (%d,%d,%llu) hba status=0x%x, dev status=0x%x, cmd=0x%x\n",
                                pHba->name, (u32)cmd->device->channel, (u32)cmd->device->id, cmd->device->lun, hba_status, dev_status, cmd->cmnd[0]);
                        cmd->result = (DID_TIME_OUT << 16);
                        break;
                case I2O_SCSI_DSC_ADAPTER_BUSY:
                case I2O_SCSI_DSC_BUS_BUSY:
                        cmd->result = (DID_BUS_BUSY << 16);
                        break;
                case I2O_SCSI_DSC_SCSI_BUS_RESET:
                case I2O_SCSI_DSC_BDR_MESSAGE_SENT:
                        cmd->result = (DID_RESET << 16);
                        break;
                case I2O_SCSI_DSC_PARITY_ERROR_FAILURE:
                        printk(KERN_WARNING"%s: SCSI CMD parity error\n",pHba->name);
                        cmd->result = (DID_PARITY << 16);
                        break;
                case I2O_SCSI_DSC_UNABLE_TO_ABORT:
                case I2O_SCSI_DSC_COMPLETE_WITH_ERROR:
                case I2O_SCSI_DSC_UNABLE_TO_TERMINATE:
                case I2O_SCSI_DSC_MR_MESSAGE_RECEIVED:
                case I2O_SCSI_DSC_AUTOSENSE_FAILED:
                case I2O_SCSI_DSC_DATA_OVERRUN:
                case I2O_SCSI_DSC_UNEXPECTED_BUS_FREE:
                case I2O_SCSI_DSC_SEQUENCE_FAILURE:
                case I2O_SCSI_DSC_REQUEST_LENGTH_ERROR:
                case I2O_SCSI_DSC_PROVIDE_FAILURE:
                case I2O_SCSI_DSC_REQUEST_TERMINATED:
                case I2O_SCSI_DSC_IDE_MESSAGE_SENT:
                case I2O_SCSI_DSC_UNACKNOWLEDGED_EVENT:
                case I2O_SCSI_DSC_MESSAGE_RECEIVED:
                case I2O_SCSI_DSC_INVALID_CDB:
                case I2O_SCSI_DSC_LUN_INVALID:
                case I2O_SCSI_DSC_SCSI_TID_INVALID:
                case I2O_SCSI_DSC_FUNCTION_UNAVAILABLE:
                case I2O_SCSI_DSC_NO_NEXUS:
                case I2O_SCSI_DSC_CDB_RECEIVED:
                case I2O_SCSI_DSC_LUN_ALREADY_ENABLED:
                case I2O_SCSI_DSC_QUEUE_FROZEN:
                case I2O_SCSI_DSC_REQUEST_INVALID:
                default:
                        printk(KERN_WARNING"%s: SCSI error %0x-Device(%d,%d,%llu) hba_status=0x%x, dev_status=0x%x, cmd=0x%x\n",
                                pHba->name, detailed_status & I2O_SCSI_DSC_MASK, (u32)cmd->device->channel, (u32)cmd->device->id, cmd->device->lun,
                               hba_status, dev_status, cmd->cmnd[0]);
                        cmd->result = (DID_ERROR << 16);
                        break;
                }

                // copy over the request sense data if it was a check
                // condition status
                if (dev_status == SAM_STAT_CHECK_CONDITION) {
                        u32 len = min(SCSI_SENSE_BUFFERSIZE, 40);
                        // Copy over the sense data
                        memcpy_fromio(cmd->sense_buffer, (reply+28) , len);
                        if(cmd->sense_buffer[0] == 0x70 /* class 7 */ && 
                           cmd->sense_buffer[2] == DATA_PROTECT ){
                                /* This is to handle an array failed */
                                cmd->result = (DID_TIME_OUT << 16);
                                printk(KERN_WARNING"%s: SCSI Data Protect-Device (%d,%d,%llu) hba_status=0x%x, dev_status=0x%x, cmd=0x%x\n",
                                        pHba->name, (u32)cmd->device->channel, (u32)cmd->device->id, cmd->device->lun,
                                        hba_status, dev_status, cmd->cmnd[0]);

                        }
                }
        } else {
                /* In this condtion we could not talk to the tid
                 * the card rejected it.  We should signal a retry
                 * for a limitted number of retries.
                 */
                cmd->result = (DID_TIME_OUT << 16);
                printk(KERN_WARNING"%s: I2O MSG_FAIL - Device (%d,%d,%llu) tid=%d, cmd=0x%x\n",
                        pHba->name, (u32)cmd->device->channel, (u32)cmd->device->id, cmd->device->lun,
                        ((struct adpt_device*)(cmd->device->hostdata))->tid, cmd->cmnd[0]);
        }

        cmd->result |= (dev_status);

        scsi_done(cmd);
}


static s32 adpt_rescan(adpt_hba* pHba)
{
        s32 rcode;
        ulong flags = 0;

        if(pHba->host)
                spin_lock_irqsave(pHba->host->host_lock, flags);
        if ((rcode=adpt_i2o_lct_get(pHba)) < 0)
                goto out;
        if ((rcode=adpt_i2o_reparse_lct(pHba)) < 0)
                goto out;
        rcode = 0;
out:    if(pHba->host)
                spin_unlock_irqrestore(pHba->host->host_lock, flags);
        return rcode;
}


static s32 adpt_i2o_reparse_lct(adpt_hba* pHba)
{
        int i;
        int max;
        int tid;
        struct i2o_device *d;
        i2o_lct *lct = pHba->lct;
        u8 bus_no = 0;
        s16 scsi_id;
        u64 scsi_lun;
        u32 buf[10]; // at least 8 u32's
        struct adpt_device* pDev = NULL;
        struct i2o_device* pI2o_dev = NULL;
        
        if (lct == NULL) {
                printk(KERN_ERR "%s: LCT is empty???\n",pHba->name);
                return -1;
        }
        
        max = lct->table_size;  
        max -= 3;
        max /= 9;

        // Mark each drive as unscanned
        for (d = pHba->devices; d; d = d->next) {
                pDev =(struct adpt_device*) d->owner;
                if(!pDev){
                        continue;
                }
                pDev->state |= DPTI_DEV_UNSCANNED;
        }

        printk(KERN_INFO "%s: LCT has %d entries.\n", pHba->name,max);
        
        for(i=0;i<max;i++) {
                if( lct->lct_entry[i].user_tid != 0xfff){
                        continue;
                }

                if( lct->lct_entry[i].class_id == I2O_CLASS_RANDOM_BLOCK_STORAGE ||
                    lct->lct_entry[i].class_id == I2O_CLASS_SCSI_PERIPHERAL ||
                    lct->lct_entry[i].class_id == I2O_CLASS_FIBRE_CHANNEL_PERIPHERAL ){
                        tid = lct->lct_entry[i].tid;
                        if(adpt_i2o_query_scalar(pHba, tid, 0x8000, -1, buf, 32)<0) {
                                printk(KERN_ERR"%s: Could not query device\n",pHba->name);
                                continue;
                        }
                        bus_no = buf[0]>>16;
                        if (bus_no >= MAX_CHANNEL) {    /* Something wrong skip it */
                                printk(KERN_WARNING
                                        "%s: Channel number %d out of range\n",
                                        pHba->name, bus_no);
                                continue;
                        }

                        scsi_id = buf[1];
                        scsi_lun = scsilun_to_int((struct scsi_lun *)&buf[2]);
                        pDev = pHba->channel[bus_no].device[scsi_id];
                        /* da lun */
                        while(pDev) {
                                if(pDev->scsi_lun == scsi_lun) {
                                        break;
                                }
                                pDev = pDev->next_lun;
                        }
                        if(!pDev ) { // Something new add it
                                d = kmalloc(sizeof(struct i2o_device),
                                            GFP_ATOMIC);
                                if(d==NULL)
                                {
                                        printk(KERN_CRIT "Out of memory for I2O device data.\n");
                                        return -ENOMEM;
                                }
                                
                                d->controller = pHba;
                                d->next = NULL;

                                memcpy(&d->lct_data, &lct->lct_entry[i], sizeof(i2o_lct_entry));

                                d->flags = 0;
                                adpt_i2o_report_hba_unit(pHba, d);
                                adpt_i2o_install_device(pHba, d);
        
                                pDev = pHba->channel[bus_no].device[scsi_id];   
                                if( pDev == NULL){
                                        pDev =
                                          kzalloc(sizeof(struct adpt_device),
                                                  GFP_ATOMIC);
                                        if(pDev == NULL) {
                                                return -ENOMEM;
                                        }
                                        pHba->channel[bus_no].device[scsi_id] = pDev;
                                } else {
                                        while (pDev->next_lun) {
                                                pDev = pDev->next_lun;
                                        }
                                        pDev = pDev->next_lun =
                                          kzalloc(sizeof(struct adpt_device),
                                                  GFP_ATOMIC);
                                        if(pDev == NULL) {
                                                return -ENOMEM;
                                        }
                                }
                                pDev->tid = d->lct_data.tid;
                                pDev->scsi_channel = bus_no;
                                pDev->scsi_id = scsi_id;
                                pDev->scsi_lun = scsi_lun;
                                pDev->pI2o_dev = d;
                                d->owner = pDev;
                                pDev->type = (buf[0])&0xff;
                                pDev->flags = (buf[0]>>8)&0xff;
                                // Too late, SCSI system has made up it's mind, but what the hey ...
                                if(scsi_id > pHba->top_scsi_id){
                                        pHba->top_scsi_id = scsi_id;
                                }
                                if(scsi_lun > pHba->top_scsi_lun){
                                        pHba->top_scsi_lun = scsi_lun;
                                }
                                continue;
                        } // end of new i2o device

                        // We found an old device - check it
                        while(pDev) {
                                if(pDev->scsi_lun == scsi_lun) {
                                        if(!scsi_device_online(pDev->pScsi_dev)) {
                                                printk(KERN_WARNING"%s: Setting device (%d,%d,%llu) back online\n",
                                                                pHba->name,bus_no,scsi_id,scsi_lun);
                                                if (pDev->pScsi_dev) {
                                                        scsi_device_set_state(pDev->pScsi_dev, SDEV_RUNNING);
                                                }
                                        }
                                        d = pDev->pI2o_dev;
                                        if(d->lct_data.tid != tid) { // something changed
                                                pDev->tid = tid;
                                                memcpy(&d->lct_data, &lct->lct_entry[i], sizeof(i2o_lct_entry));
                                                if (pDev->pScsi_dev) {
                                                        pDev->pScsi_dev->changed = TRUE;
                                                        pDev->pScsi_dev->removable = TRUE;
                                                }
                                        }
                                        // Found it - mark it scanned
                                        pDev->state = DPTI_DEV_ONLINE;
                                        break;
                                }
                                pDev = pDev->next_lun;
                        }
                }
        }
        for (pI2o_dev = pHba->devices; pI2o_dev; pI2o_dev = pI2o_dev->next) {
                pDev =(struct adpt_device*) pI2o_dev->owner;
                if(!pDev){
                        continue;
                }
                // Drive offline drives that previously existed but could not be found
                // in the LCT table
                if (pDev->state & DPTI_DEV_UNSCANNED){
                        pDev->state = DPTI_DEV_OFFLINE;
                        printk(KERN_WARNING"%s: Device (%d,%d,%llu) offline\n",pHba->name,pDev->scsi_channel,pDev->scsi_id,pDev->scsi_lun);
                        if (pDev->pScsi_dev) {
                                scsi_device_set_state(pDev->pScsi_dev, SDEV_OFFLINE);
                        }
                }
        }
        return 0;
}

/*============================================================================
 *  Routines from i2o subsystem
 *============================================================================
 */



/*
 *      Bring an I2O controller into HOLD state. See the spec.
 */
static int adpt_i2o_activate_hba(adpt_hba* pHba)
{
        int rcode;

        if(pHba->initialized ) {
                if (adpt_i2o_status_get(pHba) < 0) {
                        if((rcode = adpt_i2o_reset_hba(pHba)) != 0){
                                printk(KERN_WARNING"%s: Could NOT reset.\n", pHba->name);
                                return rcode;
                        }
                        if (adpt_i2o_status_get(pHba) < 0) {
                                printk(KERN_INFO "HBA not responding.\n");
                                return -1;
                        }
                }

                if(pHba->status_block->iop_state == ADAPTER_STATE_FAULTED) {
                        printk(KERN_CRIT "%s: hardware fault\n", pHba->name);
                        return -1;
                }

                if (pHba->status_block->iop_state == ADAPTER_STATE_READY ||
                    pHba->status_block->iop_state == ADAPTER_STATE_OPERATIONAL ||
                    pHba->status_block->iop_state == ADAPTER_STATE_HOLD ||
                    pHba->status_block->iop_state == ADAPTER_STATE_FAILED) {
                        adpt_i2o_reset_hba(pHba);                       
                        if (adpt_i2o_status_get(pHba) < 0 || pHba->status_block->iop_state != ADAPTER_STATE_RESET) {
                                printk(KERN_ERR "%s: Failed to initialize.\n", pHba->name);
                                return -1;
                        }
                }
        } else {
                if((rcode = adpt_i2o_reset_hba(pHba)) != 0){
                        printk(KERN_WARNING"%s: Could NOT reset.\n", pHba->name);
                        return rcode;
                }

        }

        if (adpt_i2o_init_outbound_q(pHba) < 0) {
                return -1;
        }

        /* In HOLD state */
        
        if (adpt_i2o_hrt_get(pHba) < 0) {
                return -1;
        }

        return 0;
}

/*
 *      Bring a controller online into OPERATIONAL state. 
 */
 
static int adpt_i2o_online_hba(adpt_hba* pHba)
{
        if (adpt_i2o_systab_send(pHba) < 0)
                return -1;
        /* In READY state */

        if (adpt_i2o_enable_hba(pHba) < 0)
                return -1;

        /* In OPERATIONAL state  */
        return 0;
}

static s32 adpt_send_nop(adpt_hba*pHba,u32 m)
{
        u32 __iomem *msg;
        ulong timeout = jiffies + 5*HZ;

        while(m == EMPTY_QUEUE){
                rmb();
                m = readl(pHba->post_port);
                if(m != EMPTY_QUEUE){
                        break;
                }
                if(time_after(jiffies,timeout)){
                        printk(KERN_ERR "%s: Timeout waiting for message frame!\n",pHba->name);
                        return 2;
                }
                schedule_timeout_uninterruptible(1);
        }
        msg = (u32 __iomem *)(pHba->msg_addr_virt + m);
        writel( THREE_WORD_MSG_SIZE | SGL_OFFSET_0,&msg[0]);
        writel( I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | 0,&msg[1]);
        writel( 0,&msg[2]);
        wmb();

        writel(m, pHba->post_port);
        wmb();
        return 0;
}

static s32 adpt_i2o_init_outbound_q(adpt_hba* pHba)
{
        u8 *status;
        dma_addr_t addr;
        u32 __iomem *msg = NULL;
        int i;
        ulong timeout = jiffies + TMOUT_INITOUTBOUND*HZ;
        u32 m;

        do {
                rmb();
                m = readl(pHba->post_port);
                if (m != EMPTY_QUEUE) {
                        break;
                }

                if(time_after(jiffies,timeout)){
                        printk(KERN_WARNING"%s: Timeout waiting for message frame\n",pHba->name);
                        return -ETIMEDOUT;
                }
                schedule_timeout_uninterruptible(1);
        } while(m == EMPTY_QUEUE);

        msg=(u32 __iomem *)(pHba->msg_addr_virt+m);

        status = dma_alloc_coherent(&pHba->pDev->dev, 4, &addr, GFP_KERNEL);
        if (!status) {
                adpt_send_nop(pHba, m);
                printk(KERN_WARNING"%s: IOP reset failed - no free memory.\n",
                        pHba->name);
                return -ENOMEM;
        }

        writel(EIGHT_WORD_MSG_SIZE| SGL_OFFSET_6, &msg[0]);
        writel(I2O_CMD_OUTBOUND_INIT<<24 | HOST_TID<<12 | ADAPTER_TID, &msg[1]);
        writel(0, &msg[2]);
        writel(0x0106, &msg[3]);        /* Transaction context */
        writel(4096, &msg[4]);          /* Host page frame size */
        writel((REPLY_FRAME_SIZE)<<16|0x80, &msg[5]);   /* Outbound msg frame size and Initcode */
        writel(0xD0000004, &msg[6]);            /* Simple SG LE, EOB */
        writel((u32)addr, &msg[7]);

        writel(m, pHba->post_port);
        wmb();

        // Wait for the reply status to come back
        do {
                if (*status) {
                        if (*status != 0x01 /*I2O_EXEC_OUTBOUND_INIT_IN_PROGRESS*/) {
                                break;
                        }
                }
                rmb();
                if(time_after(jiffies,timeout)){
                        printk(KERN_WARNING"%s: Timeout Initializing\n",pHba->name);
                        /* We lose 4 bytes of "status" here, but we
                           cannot free these because controller may
                           awake and corrupt those bytes at any time */
                        /* dma_free_coherent(&pHba->pDev->dev, 4, status, addr); */
                        return -ETIMEDOUT;
                }
                schedule_timeout_uninterruptible(1);
        } while (1);

        // If the command was successful, fill the fifo with our reply
        // message packets
        if(*status != 0x04 /*I2O_EXEC_OUTBOUND_INIT_COMPLETE*/) {
                dma_free_coherent(&pHba->pDev->dev, 4, status, addr);
                return -2;
        }
        dma_free_coherent(&pHba->pDev->dev, 4, status, addr);

        if(pHba->reply_pool != NULL) {
                dma_free_coherent(&pHba->pDev->dev,
                        pHba->reply_fifo_size * REPLY_FRAME_SIZE * 4,
                        pHba->reply_pool, pHba->reply_pool_pa);
        }

        pHba->reply_pool = dma_alloc_coherent(&pHba->pDev->dev,
                                pHba->reply_fifo_size * REPLY_FRAME_SIZE * 4,
                                &pHba->reply_pool_pa, GFP_KERNEL);
        if (!pHba->reply_pool) {
                printk(KERN_ERR "%s: Could not allocate reply pool\n", pHba->name);
                return -ENOMEM;
        }

        for(i = 0; i < pHba->reply_fifo_size; i++) {
                writel(pHba->reply_pool_pa + (i * REPLY_FRAME_SIZE * 4),
                        pHba->reply_port);
                wmb();
        }
        adpt_i2o_status_get(pHba);
        return 0;
}


/*
 * I2O System Table.  Contains information about
 * all the IOPs in the system.  Used to inform IOPs
 * about each other's existence.
 *
 * sys_tbl_ver is the CurrentChangeIndicator that is
 * used by IOPs to track changes.
 */



static s32 adpt_i2o_status_get(adpt_hba* pHba)
{
        ulong timeout;
        u32 m;
        u32 __iomem *msg;
        u8 *status_block=NULL;

        if(pHba->status_block == NULL) {
                pHba->status_block = dma_alloc_coherent(&pHba->pDev->dev,
                                        sizeof(i2o_status_block),
                                        &pHba->status_block_pa, GFP_KERNEL);
                if(pHba->status_block == NULL) {
                        printk(KERN_ERR
                        "dpti%d: Get Status Block failed; Out of memory. \n", 
                        pHba->unit);
                        return -ENOMEM;
                }
        }
        memset(pHba->status_block, 0, sizeof(i2o_status_block));
        status_block = (u8*)(pHba->status_block);
        timeout = jiffies+TMOUT_GETSTATUS*HZ;
        do {
                rmb();
                m = readl(pHba->post_port);
                if (m != EMPTY_QUEUE) {
                        break;
                }
                if(time_after(jiffies,timeout)){
                        printk(KERN_ERR "%s: Timeout waiting for message !\n",
                                        pHba->name);
                        return -ETIMEDOUT;
                }
                schedule_timeout_uninterruptible(1);
        } while(m==EMPTY_QUEUE);

        
        msg=(u32 __iomem *)(pHba->msg_addr_virt+m);

        writel(NINE_WORD_MSG_SIZE|SGL_OFFSET_0, &msg[0]);
        writel(I2O_CMD_STATUS_GET<<24|HOST_TID<<12|ADAPTER_TID, &msg[1]);
        writel(1, &msg[2]);
        writel(0, &msg[3]);
        writel(0, &msg[4]);
        writel(0, &msg[5]);
        writel( dma_low(pHba->status_block_pa), &msg[6]);
        writel( dma_high(pHba->status_block_pa), &msg[7]);
        writel(sizeof(i2o_status_block), &msg[8]); // 88 bytes

        //post message
        writel(m, pHba->post_port);
        wmb();

        while(status_block[87]!=0xff){
                if(time_after(jiffies,timeout)){
                        printk(KERN_ERR"dpti%d: Get status timeout.\n",
                                pHba->unit);
                        return -ETIMEDOUT;
                }
                rmb();
                schedule_timeout_uninterruptible(1);
        }

        // Set up our number of outbound and inbound messages
        pHba->post_fifo_size = pHba->status_block->max_inbound_frames;
        if (pHba->post_fifo_size > MAX_TO_IOP_MESSAGES) {
                pHba->post_fifo_size = MAX_TO_IOP_MESSAGES;
        }

        pHba->reply_fifo_size = pHba->status_block->max_outbound_frames;
        if (pHba->reply_fifo_size > MAX_FROM_IOP_MESSAGES) {
                pHba->reply_fifo_size = MAX_FROM_IOP_MESSAGES;
        }

        // Calculate the Scatter Gather list size
        if (dpt_dma64(pHba)) {
                pHba->sg_tablesize
                  = ((pHba->status_block->inbound_frame_size * 4
                  - 14 * sizeof(u32))
                  / (sizeof(struct sg_simple_element) + sizeof(u32)));
        } else {
                pHba->sg_tablesize
                  = ((pHba->status_block->inbound_frame_size * 4
                  - 12 * sizeof(u32))
                  / sizeof(struct sg_simple_element));
        }
        if (pHba->sg_tablesize > SG_LIST_ELEMENTS) {
                pHba->sg_tablesize = SG_LIST_ELEMENTS;
        }


#ifdef DEBUG
        printk("dpti%d: State = ",pHba->unit);
        switch(pHba->status_block->iop_state) {
                case 0x01:
                        printk("INIT\n");
                        break;
                case 0x02:
                        printk("RESET\n");
                        break;
                case 0x04:
                        printk("HOLD\n");
                        break;
                case 0x05:
                        printk("READY\n");
                        break;
                case 0x08:
                        printk("OPERATIONAL\n");
                        break;
                case 0x10:
                        printk("FAILED\n");
                        break;
                case 0x11:
                        printk("FAULTED\n");
                        break;
                default:
                        printk("%x (unknown!!)\n",pHba->status_block->iop_state);
        }
#endif
        return 0;
}

/*
 * Get the IOP's Logical Configuration Table
 */
static int adpt_i2o_lct_get(adpt_hba* pHba)
{
        u32 msg[8];
        int ret;
        u32 buf[16];

        if ((pHba->lct_size == 0) || (pHba->lct == NULL)){
                pHba->lct_size = pHba->status_block->expected_lct_size;
        }
        do {
                if (pHba->lct == NULL) {
                        pHba->lct = dma_alloc_coherent(&pHba->pDev->dev,
                                        pHba->lct_size, &pHba->lct_pa,
                                        GFP_ATOMIC);
                        if(pHba->lct == NULL) {
                                printk(KERN_CRIT "%s: Lct Get failed. Out of memory.\n",
                                        pHba->name);
                                return -ENOMEM;
                        }
                }
                memset(pHba->lct, 0, pHba->lct_size);