drivers/scsi/gdth.c

// SPDX-License-Identifier: GPL-2.0-or-later
/************************************************************************
 * Linux driver for                                                     *  
 * ICP vortex GmbH:    GDT PCI Disk Array Controllers                   *
 * Intel Corporation:  Storage RAID Controllers                         *
 *                                                                      *
 * gdth.c                                                               *
 * Copyright (C) 1995-06 ICP vortex GmbH, Achim Leubner                 *
 * Copyright (C) 2002-04 Intel Corporation                              *
 * Copyright (C) 2003-06 Adaptec Inc.                                   *
 * <achim_leubner@adaptec.com>                                          *
 *                                                                      *
 * Additions/Fixes:                                                     *
 * Boji Tony Kannanthanam <boji.t.kannanthanam@intel.com>               *
 * Johannes Dinner <johannes_dinner@adaptec.com>                        *
 *                                                                      *
 *                                                                      *
 * Linux kernel 2.6.x supported						*
 *                                                                      *
 ************************************************************************/

/* All GDT Disk Array Controllers are fully supported by this driver.
 * This includes the PCI SCSI Disk Array Controllers and the
 * PCI Fibre Channel Disk Array Controllers. See gdth.h for a complete
 * list of all controller types.
 * 
 * After the optional list of IRQ values, other possible 
 * command line options are:
 * disable:Y                    disable driver
 * disable:N                    enable driver
 * reserve_mode:0               reserve no drives for the raw service
 * reserve_mode:1               reserve all not init., removable drives
 * reserve_mode:2               reserve all not init. drives
 * reserve_list:h,b,t,l,h,b,t,l,...     reserve particular drive(s) with 
 *                              h- controller no., b- channel no., 
 *                              t- target ID, l- LUN
 * reverse_scan:Y               reverse scan order for PCI controllers         
 * reverse_scan:N               scan PCI controllers like BIOS
 * max_ids:x                    x - target ID count per channel (1..MAXID)
 * rescan:Y                     rescan all channels/IDs 
 * rescan:N                     use all devices found until now
 * hdr_channel:x                x - number of virtual bus for host drives
 * shared_access:Y              disable driver reserve/release protocol to 
 *                              access a shared resource from several nodes, 
 *                              appropriate controller firmware required
 * shared_access:N              enable driver reserve/release protocol
 * force_dma32:Y                use only 32 bit DMA mode
 * force_dma32:N                use 64 bit DMA mode, if supported
 *
 * The default values are: "gdth=disable:N,reserve_mode:1,reverse_scan:N,
 *                          max_ids:127,rescan:N,hdr_channel:0,
 *                          shared_access:Y,force_dma32:N".
 * Here is another example: "gdth=reserve_list:0,1,2,0,0,1,3,0,rescan:Y".
 * 
 * When loading the gdth driver as a module, the same options are available. 
 * You can set the IRQs with "IRQ=...". However, the syntax to specify the
 * options changes slightly. You must replace all ',' between options 
 * with ' ' and all ':' with '=' and you must use 
 * '1' in place of 'Y' and '0' in place of 'N'.
 * 
 * Default: "modprobe gdth disable=0 reserve_mode=1 reverse_scan=0
 *           max_ids=127 rescan=0 hdr_channel=0 shared_access=0
 *           force_dma32=0"
 * The other example: "modprobe gdth reserve_list=0,1,2,0,0,1,3,0 rescan=1".
 */

/* The meaning of the Scsi_Pointer members in this driver is as follows:
 * ptr:                     Chaining
 * this_residual:           unused
 * buffer:                  unused
 * dma_handle:              unused
 * buffers_residual:        unused
 * Status:                  unused
 * Message:                 unused
 * have_data_in:            unused
 * sent_command:            unused
 * phase:                   unused
 */

/* statistics */
#define GDTH_STATISTICS

#include <linux/module.h>

#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/proc_fs.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/reboot.h>

#include <asm/dma.h>
#include <asm/io.h>
#include <linux/uaccess.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
#include <linux/scatterlist.h>

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

static DEFINE_MUTEX(gdth_mutex);
static void gdth_delay(int milliseconds);
static void gdth_eval_mapping(u32 size, u32 *cyls, int *heads, int *secs);
static irqreturn_t gdth_interrupt(int irq, void *dev_id);
static irqreturn_t __gdth_interrupt(gdth_ha_str *ha,
                                    int gdth_from_wait, int* pIndex);
static int gdth_sync_event(gdth_ha_str *ha, int service, u8 index,
                                                               struct scsi_cmnd *scp);
static int gdth_async_event(gdth_ha_str *ha);
static void gdth_log_event(gdth_evt_data *dvr, char *buffer);

static void gdth_putq(gdth_ha_str *ha, struct scsi_cmnd *scp, u8 priority);
static void gdth_next(gdth_ha_str *ha);
static int gdth_fill_raw_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp, u8 b);
static int gdth_special_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp);
static gdth_evt_str *gdth_store_event(gdth_ha_str *ha, u16 source,
                                      u16 idx, gdth_evt_data *evt);
static int gdth_read_event(gdth_ha_str *ha, int handle, gdth_evt_str *estr);
static void gdth_readapp_event(gdth_ha_str *ha, u8 application, 
                               gdth_evt_str *estr);
static void gdth_clear_events(void);

static void gdth_copy_internal_data(gdth_ha_str *ha, struct scsi_cmnd *scp,
                                    char *buffer, u16 count);
static int gdth_internal_cache_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp);
static int gdth_fill_cache_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp,
			       u16 hdrive);

static void gdth_enable_int(gdth_ha_str *ha);
static int gdth_test_busy(gdth_ha_str *ha);
static int gdth_get_cmd_index(gdth_ha_str *ha);
static void gdth_release_event(gdth_ha_str *ha);
static int gdth_wait(gdth_ha_str *ha, int index,u32 time);
static int gdth_internal_cmd(gdth_ha_str *ha, u8 service, u16 opcode,
                                             u32 p1, u64 p2,u64 p3);
static int gdth_search_drives(gdth_ha_str *ha);
static int gdth_analyse_hdrive(gdth_ha_str *ha, u16 hdrive);

static const char *gdth_ctr_name(gdth_ha_str *ha);

static int gdth_open(struct inode *inode, struct file *filep);
static int gdth_close(struct inode *inode, struct file *filep);
static long gdth_unlocked_ioctl(struct file *filep, unsigned int cmd,
			        unsigned long arg);

static void gdth_flush(gdth_ha_str *ha);
static int gdth_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmd);
static int __gdth_queuecommand(gdth_ha_str *ha, struct scsi_cmnd *scp,
				struct gdth_cmndinfo *cmndinfo);
static void gdth_scsi_done(struct scsi_cmnd *scp);

#ifdef DEBUG_GDTH
static u8   DebugState = DEBUG_GDTH;
#define TRACE(a)    {if (DebugState==1) {printk a;}}
#define TRACE2(a)   {if (DebugState==1 || DebugState==2) {printk a;}}
#define TRACE3(a)   {if (DebugState!=0) {printk a;}}
#else /* !DEBUG */
#define TRACE(a)
#define TRACE2(a)
#define TRACE3(a)
#endif

#ifdef GDTH_STATISTICS
static u32 max_rq=0, max_index=0, max_sg=0;
static u32 act_ints=0, act_ios=0, act_stats=0, act_rq=0;
static struct timer_list gdth_timer;
#endif

#define PTR2USHORT(a)   (u16)(unsigned long)(a)
#define GDTOFFSOF(a,b)  (size_t)&(((a*)0)->b)
#define INDEX_OK(i,t)   ((i)<ARRAY_SIZE(t))

#define BUS_L2P(a,b)    ((b)>(a)->virt_bus ? (b-1):(b))

static u8   gdth_polling;                           /* polling if TRUE */
static int      gdth_ctr_count  = 0;                    /* controller count */
static LIST_HEAD(gdth_instances);                       /* controller list */
static u8   gdth_write_through = FALSE;             /* write through */
static gdth_evt_str ebuffer[MAX_EVENTS];                /* event buffer */
static int elastidx;
static int eoldidx;
static int major;

#define DIN     1                               /* IN data direction */
#define DOU     2                               /* OUT data direction */
#define DNO     DIN                             /* no data transfer */
#define DUN     DIN                             /* unknown data direction */
static u8 gdth_direction_tab[0x100] = {
    DNO,DNO,DIN,DIN,DOU,DIN,DIN,DOU,DIN,DUN,DOU,DOU,DUN,DUN,DUN,DIN,
    DNO,DIN,DIN,DOU,DIN,DOU,DNO,DNO,DOU,DNO,DIN,DNO,DIN,DOU,DNO,DUN,
    DIN,DUN,DIN,DUN,DOU,DIN,DUN,DUN,DIN,DIN,DOU,DNO,DUN,DIN,DOU,DOU,
    DOU,DOU,DOU,DNO,DIN,DNO,DNO,DIN,DOU,DOU,DOU,DOU,DIN,DOU,DIN,DOU,
    DOU,DOU,DIN,DIN,DIN,DNO,DUN,DNO,DNO,DNO,DUN,DNO,DOU,DIN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DOU,DUN,DUN,DUN,DUN,DIN,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DIN,DUN,DOU,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DIN,DUN,
    DUN,DUN,DUN,DUN,DUN,DNO,DNO,DUN,DIN,DNO,DOU,DUN,DNO,DUN,DOU,DOU,
    DOU,DOU,DOU,DNO,DUN,DIN,DOU,DIN,DIN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DOU,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DOU,DUN,DUN,DUN,DUN,DUN,
    DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN,DUN
};

/* LILO and modprobe/insmod parameters */
/* disable driver flag */
static int disable __initdata = 0;
/* reserve flag */
static int reserve_mode = 1;                  
/* reserve list */
static int reserve_list[MAX_RES_ARGS] = 
{0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
/* scan order for PCI controllers */
static int reverse_scan = 0;
/* virtual channel for the host drives */
static int hdr_channel = 0;
/* max. IDs per channel */
static int max_ids = MAXID;
/* rescan all IDs */
static int rescan = 0;
/* shared access */
static int shared_access = 1;
/* 64 bit DMA mode, support for drives > 2 TB, if force_dma32 = 0 */
static int force_dma32 = 0;

/* parameters for modprobe/insmod */
module_param(disable, int, 0);
module_param(reserve_mode, int, 0);
module_param_array(reserve_list, int, NULL, 0);
module_param(reverse_scan, int, 0);
module_param(hdr_channel, int, 0);
module_param(max_ids, int, 0);
module_param(rescan, int, 0);
module_param(shared_access, int, 0);
module_param(force_dma32, int, 0);
MODULE_AUTHOR("Achim Leubner");
MODULE_LICENSE("GPL");

/* ioctl interface */
static const struct file_operations gdth_fops = {
    .unlocked_ioctl   = gdth_unlocked_ioctl,
    .open    = gdth_open,
    .release = gdth_close,
    .llseek = noop_llseek,
};

#include "gdth_proc.h"
#include "gdth_proc.c"

static gdth_ha_str *gdth_find_ha(int hanum)
{
	gdth_ha_str *ha;

	list_for_each_entry(ha, &gdth_instances, list)
		if (hanum == ha->hanum)
			return ha;

	return NULL;
}

static struct gdth_cmndinfo *gdth_get_cmndinfo(gdth_ha_str *ha)
{
	struct gdth_cmndinfo *priv = NULL;
	unsigned long flags;
	int i;

	spin_lock_irqsave(&ha->smp_lock, flags);

	for (i=0; i<GDTH_MAXCMDS; ++i) {
		if (ha->cmndinfo[i].index == 0) {
			priv = &ha->cmndinfo[i];
			memset(priv, 0, sizeof(*priv));
			priv->index = i+1;
			break;
		}
	}

	spin_unlock_irqrestore(&ha->smp_lock, flags);

	return priv;
}

static void gdth_put_cmndinfo(struct gdth_cmndinfo *priv)
{
	BUG_ON(!priv);
	priv->index = 0;
}

static void gdth_delay(int milliseconds)
{
    if (milliseconds == 0) {
        udelay(1);
    } else {
        mdelay(milliseconds);
    }
}

static void gdth_scsi_done(struct scsi_cmnd *scp)
{
	struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
	int internal_command = cmndinfo->internal_command;

	TRACE2(("gdth_scsi_done()\n"));

	gdth_put_cmndinfo(cmndinfo);
	scp->host_scribble = NULL;

	if (internal_command)
		complete((struct completion *)scp->request);
	else
		scp->scsi_done(scp);
}

static int __gdth_execute(struct scsi_device *sdev, gdth_cmd_str *gdtcmd,
			  char *cmnd, int timeout, u32 *info)
{
    gdth_ha_str *ha = shost_priv(sdev->host);
    struct scsi_cmnd *scp;
    struct gdth_cmndinfo cmndinfo;
    DECLARE_COMPLETION_ONSTACK(wait);
    int rval;

    scp = kzalloc(sizeof(*scp), GFP_KERNEL);
    if (!scp)
        return -ENOMEM;

    scp->sense_buffer = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
    if (!scp->sense_buffer) {
	kfree(scp);
	return -ENOMEM;
    }

    scp->device = sdev;
    memset(&cmndinfo, 0, sizeof(cmndinfo));

    /* use request field to save the ptr. to completion struct. */
    scp->request = (struct request *)&wait;
    scp->cmd_len = 12;
    scp->cmnd = cmnd;
    cmndinfo.priority = IOCTL_PRI;
    cmndinfo.internal_cmd_str = gdtcmd;
    cmndinfo.internal_command = 1;

    TRACE(("__gdth_execute() cmd 0x%x\n", scp->cmnd[0]));
    __gdth_queuecommand(ha, scp, &cmndinfo);

    wait_for_completion(&wait);

    rval = cmndinfo.status;
    if (info)
        *info = cmndinfo.info;
    kfree(scp->sense_buffer);
    kfree(scp);
    return rval;
}

int gdth_execute(struct Scsi_Host *shost, gdth_cmd_str *gdtcmd, char *cmnd,
                 int timeout, u32 *info)
{
    struct scsi_device *sdev = scsi_get_host_dev(shost);
    int rval = __gdth_execute(sdev, gdtcmd, cmnd, timeout, info);

    scsi_free_host_dev(sdev);
    return rval;
}

static void gdth_eval_mapping(u32 size, u32 *cyls, int *heads, int *secs)
{
    *cyls = size /HEADS/SECS;
    if (*cyls <= MAXCYLS) {
        *heads = HEADS;
        *secs = SECS;
    } else {                                        /* too high for 64*32 */
        *cyls = size /MEDHEADS/MEDSECS;
        if (*cyls <= MAXCYLS) {
            *heads = MEDHEADS;
            *secs = MEDSECS;
        } else {                                    /* too high for 127*63 */
            *cyls = size /BIGHEADS/BIGSECS;
            *heads = BIGHEADS;
            *secs = BIGSECS;
        }
    }
}

static bool gdth_search_vortex(u16 device)
{
	if (device <= PCI_DEVICE_ID_VORTEX_GDT6555)
		return true;
	if (device >= PCI_DEVICE_ID_VORTEX_GDT6x17RP &&
	    device <= PCI_DEVICE_ID_VORTEX_GDTMAXRP)
		return true;
	if (device == PCI_DEVICE_ID_VORTEX_GDTNEWRX ||
	    device == PCI_DEVICE_ID_VORTEX_GDTNEWRX2)
		return true;
	return false;
}

static int gdth_pci_probe_one(gdth_pci_str *pcistr, gdth_ha_str **ha_out);
static int gdth_pci_init_one(struct pci_dev *pdev,
			     const struct pci_device_id *ent);
static void gdth_pci_remove_one(struct pci_dev *pdev);
static void gdth_remove_one(gdth_ha_str *ha);

/* Vortex only makes RAID controllers.
 * We do not really want to specify all 550 ids here, so wildcard match.
 */
static const struct pci_device_id gdthtable[] = {
	{ PCI_VDEVICE(VORTEX, PCI_ANY_ID) },
	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SRC) },
	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SRC_XSCALE) },
	{ }	/* terminate list */
};
MODULE_DEVICE_TABLE(pci, gdthtable);

static struct pci_driver gdth_pci_driver = {
	.name		= "gdth",
	.id_table	= gdthtable,
	.probe		= gdth_pci_init_one,
	.remove		= gdth_pci_remove_one,
};

static void gdth_pci_remove_one(struct pci_dev *pdev)
{
	gdth_ha_str *ha = pci_get_drvdata(pdev);

	list_del(&ha->list);
	gdth_remove_one(ha);

	pci_disable_device(pdev);
}

static int gdth_pci_init_one(struct pci_dev *pdev,
			     const struct pci_device_id *ent)
{
	u16 vendor = pdev->vendor;
	u16 device = pdev->device;
	unsigned long base0, base1, base2;
	int rc;
	gdth_pci_str gdth_pcistr;
	gdth_ha_str *ha = NULL;
    
	TRACE(("gdth_search_dev() cnt %d vendor %x device %x\n",
	       gdth_ctr_count, vendor, device));

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

	if (vendor == PCI_VENDOR_ID_VORTEX && !gdth_search_vortex(device))
		return -ENODEV;

	rc = pci_enable_device(pdev);
	if (rc)
		return rc;

	if (gdth_ctr_count >= MAXHA)
		return -EBUSY;

        /* GDT PCI controller found, resources are already in pdev */
	gdth_pcistr.pdev = pdev;
        base0 = pci_resource_flags(pdev, 0);
        base1 = pci_resource_flags(pdev, 1);
        base2 = pci_resource_flags(pdev, 2);
        if (device <= PCI_DEVICE_ID_VORTEX_GDT6000B ||   /* GDT6000/B */
            device >= PCI_DEVICE_ID_VORTEX_GDT6x17RP) {  /* MPR */
            if (!(base0 & IORESOURCE_MEM)) 
		return -ENODEV;
	    gdth_pcistr.dpmem = pci_resource_start(pdev, 0);
        } else {                                  /* GDT6110, GDT6120, .. */
            if (!(base0 & IORESOURCE_MEM) ||
                !(base2 & IORESOURCE_MEM) ||
                !(base1 & IORESOURCE_IO)) 
		return -ENODEV;
	    gdth_pcistr.dpmem = pci_resource_start(pdev, 2);
	    gdth_pcistr.io    = pci_resource_start(pdev, 1);
        }
        TRACE2(("Controller found at %d/%d, irq %d, dpmem 0x%lx\n",
		gdth_pcistr.pdev->bus->number,
		PCI_SLOT(gdth_pcistr.pdev->devfn),
		gdth_pcistr.irq,
		gdth_pcistr.dpmem));

	rc = gdth_pci_probe_one(&gdth_pcistr, &ha);
	if (rc)
		return rc;

	return 0;
}

static int gdth_init_pci(struct pci_dev *pdev, gdth_pci_str *pcistr,
			 gdth_ha_str *ha)
{
    register gdt6_dpram_str __iomem *dp6_ptr;
    register gdt6c_dpram_str __iomem *dp6c_ptr;
    register gdt6m_dpram_str __iomem *dp6m_ptr;
    u32 retries;
    u8 prot_ver;
    u16 command;
    int i, found = FALSE;

    TRACE(("gdth_init_pci()\n"));

    if (pdev->vendor == PCI_VENDOR_ID_INTEL)
        ha->oem_id = OEM_ID_INTEL;
    else
        ha->oem_id = OEM_ID_ICP;
    ha->brd_phys = (pdev->bus->number << 8) | (pdev->devfn & 0xf8);
    ha->stype = (u32)pdev->device;
    ha->irq = pdev->irq;
    ha->pdev = pdev;
    
    if (ha->pdev->device <= PCI_DEVICE_ID_VORTEX_GDT6000B) {  /* GDT6000/B */
        TRACE2(("init_pci() dpmem %lx irq %d\n",pcistr->dpmem,ha->irq));
        ha->brd = ioremap(pcistr->dpmem, sizeof(gdt6_dpram_str));
        if (ha->brd == NULL) {
            printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
            return 0;
        }
        /* check and reset interface area */
        dp6_ptr = ha->brd;
        writel(DPMEM_MAGIC, &dp6_ptr->u);
        if (readl(&dp6_ptr->u) != DPMEM_MAGIC) {
            printk("GDT-PCI: Cannot access DPMEM at 0x%lx (shadowed?)\n", 
                   pcistr->dpmem);
            found = FALSE;
            for (i = 0xC8000; i < 0xE8000; i += 0x4000) {
                iounmap(ha->brd);
                ha->brd = ioremap(i, sizeof(u16)); 
                if (ha->brd == NULL) {
                    printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
                    return 0;
                }
                if (readw(ha->brd) != 0xffff) {
                    TRACE2(("init_pci_old() address 0x%x busy\n", i));
                    continue;
                }
                iounmap(ha->brd);
		pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, i);
                ha->brd = ioremap(i, sizeof(gdt6_dpram_str)); 
                if (ha->brd == NULL) {
                    printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
                    return 0;
                }
                dp6_ptr = ha->brd;
                writel(DPMEM_MAGIC, &dp6_ptr->u);
                if (readl(&dp6_ptr->u) == DPMEM_MAGIC) {
                    printk("GDT-PCI: Use free address at 0x%x\n", i);
                    found = TRUE;
                    break;
                }
            }   
            if (!found) {
                printk("GDT-PCI: No free address found!\n");
                iounmap(ha->brd);
                return 0;
            }
        }
        memset_io(&dp6_ptr->u, 0, sizeof(dp6_ptr->u));
        if (readl(&dp6_ptr->u) != 0) {
            printk("GDT-PCI: Initialization error (DPMEM write error)\n");
            iounmap(ha->brd);
            return 0;
        }
        
        /* disable board interrupts, deinit services */
        writeb(0xff, &dp6_ptr->io.irqdel);
        writeb(0x00, &dp6_ptr->io.irqen);
        writeb(0x00, &dp6_ptr->u.ic.S_Status);
        writeb(0x00, &dp6_ptr->u.ic.Cmd_Index);

        writel(pcistr->dpmem, &dp6_ptr->u.ic.S_Info[0]);
        writeb(0xff, &dp6_ptr->u.ic.S_Cmd_Indx);
        writeb(0, &dp6_ptr->io.event);
        retries = INIT_RETRIES;
        gdth_delay(20);
        while (readb(&dp6_ptr->u.ic.S_Status) != 0xff) {
            if (--retries == 0) {
                printk("GDT-PCI: Initialization error (DEINIT failed)\n");
                iounmap(ha->brd);
                return 0;
            }
            gdth_delay(1);
        }
        prot_ver = (u8)readl(&dp6_ptr->u.ic.S_Info[0]);
        writeb(0, &dp6_ptr->u.ic.S_Status);
        writeb(0xff, &dp6_ptr->io.irqdel);
        if (prot_ver != PROTOCOL_VERSION) {
            printk("GDT-PCI: Illegal protocol version\n");
            iounmap(ha->brd);
            return 0;
        }

        ha->type = GDT_PCI;
        ha->ic_all_size = sizeof(dp6_ptr->u);
        
        /* special command to controller BIOS */
        writel(0x00, &dp6_ptr->u.ic.S_Info[0]);
        writel(0x00, &dp6_ptr->u.ic.S_Info[1]);
        writel(0x00, &dp6_ptr->u.ic.S_Info[2]);
        writel(0x00, &dp6_ptr->u.ic.S_Info[3]);
        writeb(0xfe, &dp6_ptr->u.ic.S_Cmd_Indx);
        writeb(0, &dp6_ptr->io.event);
        retries = INIT_RETRIES;
        gdth_delay(20);
        while (readb(&dp6_ptr->u.ic.S_Status) != 0xfe) {
            if (--retries == 0) {
                printk("GDT-PCI: Initialization error\n");
                iounmap(ha->brd);
                return 0;
            }
            gdth_delay(1);
        }
        writeb(0, &dp6_ptr->u.ic.S_Status);
        writeb(0xff, &dp6_ptr->io.irqdel);

        ha->dma64_support = 0;

    } else if (ha->pdev->device <= PCI_DEVICE_ID_VORTEX_GDT6555) { /* GDT6110, ... */
        ha->plx = (gdt6c_plx_regs *)pcistr->io;
        TRACE2(("init_pci_new() dpmem %lx irq %d\n",
            pcistr->dpmem,ha->irq));
        ha->brd = ioremap(pcistr->dpmem, sizeof(gdt6c_dpram_str));
        if (ha->brd == NULL) {
            printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
            iounmap(ha->brd);
            return 0;
        }
        /* check and reset interface area */
        dp6c_ptr = ha->brd;
        writel(DPMEM_MAGIC, &dp6c_ptr->u);
        if (readl(&dp6c_ptr->u) != DPMEM_MAGIC) {
            printk("GDT-PCI: Cannot access DPMEM at 0x%lx (shadowed?)\n", 
                   pcistr->dpmem);
            found = FALSE;
            for (i = 0xC8000; i < 0xE8000; i += 0x4000) {
                iounmap(ha->brd);
                ha->brd = ioremap(i, sizeof(u16)); 
                if (ha->brd == NULL) {
                    printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
                    return 0;
                }
                if (readw(ha->brd) != 0xffff) {
                    TRACE2(("init_pci_plx() address 0x%x busy\n", i));
                    continue;
                }
                iounmap(ha->brd);
		pci_write_config_dword(pdev, PCI_BASE_ADDRESS_2, i);
                ha->brd = ioremap(i, sizeof(gdt6c_dpram_str)); 
                if (ha->brd == NULL) {
                    printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
                    return 0;
                }
                dp6c_ptr = ha->brd;
                writel(DPMEM_MAGIC, &dp6c_ptr->u);
                if (readl(&dp6c_ptr->u) == DPMEM_MAGIC) {
                    printk("GDT-PCI: Use free address at 0x%x\n", i);
                    found = TRUE;
                    break;
                }
            }   
            if (!found) {
                printk("GDT-PCI: No free address found!\n");
                iounmap(ha->brd);
                return 0;
            }
        }
        memset_io(&dp6c_ptr->u, 0, sizeof(dp6c_ptr->u));
        if (readl(&dp6c_ptr->u) != 0) {
            printk("GDT-PCI: Initialization error (DPMEM write error)\n");
            iounmap(ha->brd);
            return 0;
        }
        
        /* disable board interrupts, deinit services */
        outb(0x00,PTR2USHORT(&ha->plx->control1));
        outb(0xff,PTR2USHORT(&ha->plx->edoor_reg));
        
        writeb(0x00, &dp6c_ptr->u.ic.S_Status);
        writeb(0x00, &dp6c_ptr->u.ic.Cmd_Index);

        writel(pcistr->dpmem, &dp6c_ptr->u.ic.S_Info[0]);
        writeb(0xff, &dp6c_ptr->u.ic.S_Cmd_Indx);

        outb(1,PTR2USHORT(&ha->plx->ldoor_reg));

        retries = INIT_RETRIES;
        gdth_delay(20);
        while (readb(&dp6c_ptr->u.ic.S_Status) != 0xff) {
            if (--retries == 0) {
                printk("GDT-PCI: Initialization error (DEINIT failed)\n");
                iounmap(ha->brd);
                return 0;
            }
            gdth_delay(1);
        }
        prot_ver = (u8)readl(&dp6c_ptr->u.ic.S_Info[0]);
        writeb(0, &dp6c_ptr->u.ic.Status);
        if (prot_ver != PROTOCOL_VERSION) {
            printk("GDT-PCI: Illegal protocol version\n");
            iounmap(ha->brd);
            return 0;
        }

        ha->type = GDT_PCINEW;
        ha->ic_all_size = sizeof(dp6c_ptr->u);

        /* special command to controller BIOS */
        writel(0x00, &dp6c_ptr->u.ic.S_Info[0]);
        writel(0x00, &dp6c_ptr->u.ic.S_Info[1]);
        writel(0x00, &dp6c_ptr->u.ic.S_Info[2]);
        writel(0x00, &dp6c_ptr->u.ic.S_Info[3]);
        writeb(0xfe, &dp6c_ptr->u.ic.S_Cmd_Indx);
        
        outb(1,PTR2USHORT(&ha->plx->ldoor_reg));

        retries = INIT_RETRIES;
        gdth_delay(20);
        while (readb(&dp6c_ptr->u.ic.S_Status) != 0xfe) {
            if (--retries == 0) {
                printk("GDT-PCI: Initialization error\n");
                iounmap(ha->brd);
                return 0;
            }
            gdth_delay(1);
        }
        writeb(0, &dp6c_ptr->u.ic.S_Status);

        ha->dma64_support = 0;

    } else {                                            /* MPR */
        TRACE2(("init_pci_mpr() dpmem %lx irq %d\n",pcistr->dpmem,ha->irq));
        ha->brd = ioremap(pcistr->dpmem, sizeof(gdt6m_dpram_str));
        if (ha->brd == NULL) {
            printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
            return 0;
        }

        /* manipulate config. space to enable DPMEM, start RP controller */
	pci_read_config_word(pdev, PCI_COMMAND, &command);
        command |= 6;
	pci_write_config_word(pdev, PCI_COMMAND, command);
	gdth_delay(1);

        dp6m_ptr = ha->brd;

        /* Ensure that it is safe to access the non HW portions of DPMEM.
         * Aditional check needed for Xscale based RAID controllers */
        while( ((int)readb(&dp6m_ptr->i960r.sema0_reg) ) & 3 )
            gdth_delay(1);
        
        /* check and reset interface area */
        writel(DPMEM_MAGIC, &dp6m_ptr->u);
        if (readl(&dp6m_ptr->u) != DPMEM_MAGIC) {
            printk("GDT-PCI: Cannot access DPMEM at 0x%lx (shadowed?)\n", 
                   pcistr->dpmem);
            found = FALSE;
            for (i = 0xC8000; i < 0xE8000; i += 0x4000) {
                iounmap(ha->brd);
                ha->brd = ioremap(i, sizeof(u16)); 
                if (ha->brd == NULL) {
                    printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
                    return 0;
                }
                if (readw(ha->brd) != 0xffff) {
                    TRACE2(("init_pci_mpr() address 0x%x busy\n", i));
                    continue;
                }
                iounmap(ha->brd);
		pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, i);
                ha->brd = ioremap(i, sizeof(gdt6m_dpram_str)); 
                if (ha->brd == NULL) {
                    printk("GDT-PCI: Initialization error (DPMEM remap error)\n");
                    return 0;
                }
                dp6m_ptr = ha->brd;
                writel(DPMEM_MAGIC, &dp6m_ptr->u);
                if (readl(&dp6m_ptr->u) == DPMEM_MAGIC) {
                    printk("GDT-PCI: Use free address at 0x%x\n", i);
                    found = TRUE;
                    break;
                }
            }   
            if (!found) {
                printk("GDT-PCI: No free address found!\n");
                iounmap(ha->brd);
                return 0;
            }
        }
        memset_io(&dp6m_ptr->u, 0, sizeof(dp6m_ptr->u));
        
        /* disable board interrupts, deinit services */
        writeb(readb(&dp6m_ptr->i960r.edoor_en_reg) | 4,
                    &dp6m_ptr->i960r.edoor_en_reg);
        writeb(0xff, &dp6m_ptr->i960r.edoor_reg);
        writeb(0x00, &dp6m_ptr->u.ic.S_Status);
        writeb(0x00, &dp6m_ptr->u.ic.Cmd_Index);

        writel(pcistr->dpmem, &dp6m_ptr->u.ic.S_Info[0]);
        writeb(0xff, &dp6m_ptr->u.ic.S_Cmd_Indx);
        writeb(1, &dp6m_ptr->i960r.ldoor_reg);
        retries = INIT_RETRIES;
        gdth_delay(20);
        while (readb(&dp6m_ptr->u.ic.S_Status) != 0xff) {
            if (--retries == 0) {
                printk("GDT-PCI: Initialization error (DEINIT failed)\n");
                iounmap(ha->brd);
                return 0;
            }
            gdth_delay(1);
        }
        prot_ver = (u8)readl(&dp6m_ptr->u.ic.S_Info[0]);
        writeb(0, &dp6m_ptr->u.ic.S_Status);
        if (prot_ver != PROTOCOL_VERSION) {
            printk("GDT-PCI: Illegal protocol version\n");
            iounmap(ha->brd);
            return 0;
        }

        ha->type = GDT_PCIMPR;
        ha->ic_all_size = sizeof(dp6m_ptr->u);
        
        /* special command to controller BIOS */
        writel(0x00, &dp6m_ptr->u.ic.S_Info[0]);
        writel(0x00, &dp6m_ptr->u.ic.S_Info[1]);
        writel(0x00, &dp6m_ptr->u.ic.S_Info[2]);
        writel(0x00, &dp6m_ptr->u.ic.S_Info[3]);
        writeb(0xfe, &dp6m_ptr->u.ic.S_Cmd_Indx);
        writeb(1, &dp6m_ptr->i960r.ldoor_reg);
        retries = INIT_RETRIES;
        gdth_delay(20);
        while (readb(&dp6m_ptr->u.ic.S_Status) != 0xfe) {
            if (--retries == 0) {
                printk("GDT-PCI: Initialization error\n");
                iounmap(ha->brd);
                return 0;
            }
            gdth_delay(1);
        }
        writeb(0, &dp6m_ptr->u.ic.S_Status);

        /* read FW version to detect 64-bit DMA support */
        writeb(0xfd, &dp6m_ptr->u.ic.S_Cmd_Indx);
        writeb(1, &dp6m_ptr->i960r.ldoor_reg);
        retries = INIT_RETRIES;
        gdth_delay(20);
        while (readb(&dp6m_ptr->u.ic.S_Status) != 0xfd) {
            if (--retries == 0) {
                printk("GDT-PCI: Initialization error (DEINIT failed)\n");
                iounmap(ha->brd);
                return 0;
            }
            gdth_delay(1);
        }
        prot_ver = (u8)(readl(&dp6m_ptr->u.ic.S_Info[0]) >> 16);
        writeb(0, &dp6m_ptr->u.ic.S_Status);
        if (prot_ver < 0x2b)      /* FW < x.43: no 64-bit DMA support */
            ha->dma64_support = 0;
        else 
            ha->dma64_support = 1;
    }

    return 1;
}

/* controller protocol functions */

static void gdth_enable_int(gdth_ha_str *ha)
{
    unsigned long flags;
    gdt6_dpram_str __iomem *dp6_ptr;
    gdt6m_dpram_str __iomem *dp6m_ptr;

    TRACE(("gdth_enable_int() hanum %d\n",ha->hanum));
    spin_lock_irqsave(&ha->smp_lock, flags);

    if (ha->type == GDT_PCI) {
        dp6_ptr = ha->brd;
        writeb(1, &dp6_ptr->io.irqdel);
        writeb(0, &dp6_ptr->u.ic.Cmd_Index);
        writeb(1, &dp6_ptr->io.irqen);
    } else if (ha->type == GDT_PCINEW) {
        outb(0xff, PTR2USHORT(&ha->plx->edoor_reg));
        outb(0x03, PTR2USHORT(&ha->plx->control1));
    } else if (ha->type == GDT_PCIMPR) {
        dp6m_ptr = ha->brd;
        writeb(0xff, &dp6m_ptr->i960r.edoor_reg);
        writeb(readb(&dp6m_ptr->i960r.edoor_en_reg) & ~4,
                    &dp6m_ptr->i960r.edoor_en_reg);
    }
    spin_unlock_irqrestore(&ha->smp_lock, flags);
}

/* return IStatus if interrupt was from this card else 0 */
static u8 gdth_get_status(gdth_ha_str *ha)
{
    u8 IStatus = 0;

    TRACE(("gdth_get_status() irq %d ctr_count %d\n", ha->irq, gdth_ctr_count));

        if (ha->type == GDT_PCI)
            IStatus =
                readb(&((gdt6_dpram_str __iomem *)ha->brd)->u.ic.Cmd_Index);
        else if (ha->type == GDT_PCINEW) 
            IStatus = inb(PTR2USHORT(&ha->plx->edoor_reg));
        else if (ha->type == GDT_PCIMPR)
            IStatus =
                readb(&((gdt6m_dpram_str __iomem *)ha->brd)->i960r.edoor_reg);

        return IStatus;
}

static int gdth_test_busy(gdth_ha_str *ha)
{
    register int gdtsema0 = 0;

    TRACE(("gdth_test_busy() hanum %d\n", ha->hanum));

    if (ha->type == GDT_PCI)
        gdtsema0 = (int)readb(&((gdt6_dpram_str __iomem *)ha->brd)->u.ic.Sema0);
    else if (ha->type == GDT_PCINEW) 
        gdtsema0 = (int)inb(PTR2USHORT(&ha->plx->sema0_reg));
    else if (ha->type == GDT_PCIMPR)
        gdtsema0 = 
            (int)readb(&((gdt6m_dpram_str __iomem *)ha->brd)->i960r.sema0_reg);

    return (gdtsema0 & 1);
}


static int gdth_get_cmd_index(gdth_ha_str *ha)
{
    int i;

    TRACE(("gdth_get_cmd_index() hanum %d\n", ha->hanum));

    for (i=0; i<GDTH_MAXCMDS; ++i) {
        if (ha->cmd_tab[i].cmnd == UNUSED_CMND) {
            ha->cmd_tab[i].cmnd = ha->pccb->RequestBuffer;
            ha->cmd_tab[i].service = ha->pccb->Service;
            ha->pccb->CommandIndex = (u32)i+2;
            return (i+2);
        }
    }
    return 0;
}


static void gdth_set_sema0(gdth_ha_str *ha)
{
    TRACE(("gdth_set_sema0() hanum %d\n", ha->hanum));

    if (ha->type == GDT_PCI) {
        writeb(1, &((gdt6_dpram_str __iomem *)ha->brd)->u.ic.Sema0);
    } else if (ha->type == GDT_PCINEW) { 
        outb(1, PTR2USHORT(&ha->plx->sema0_reg));
    } else if (ha->type == GDT_PCIMPR) {
        writeb(1, &((gdt6m_dpram_str __iomem *)ha->brd)->i960r.sema0_reg);
    }
}


static void gdth_copy_command(gdth_ha_str *ha)
{
    register gdth_cmd_str *cmd_ptr;
    register gdt6m_dpram_str __iomem *dp6m_ptr;
    register gdt6c_dpram_str __iomem *dp6c_ptr;
    gdt6_dpram_str __iomem *dp6_ptr;
    u16 cp_count,dp_offset,cmd_no;
    
    TRACE(("gdth_copy_command() hanum %d\n", ha->hanum));

    cp_count = ha->cmd_len;
    dp_offset= ha->cmd_offs_dpmem;
    cmd_no   = ha->cmd_cnt;
    cmd_ptr  = ha->pccb;

    ++ha->cmd_cnt;                                                      

    /* set cpcount dword aligned */
    if (cp_count & 3)
        cp_count += (4 - (cp_count & 3));

    ha->cmd_offs_dpmem += cp_count;
    
    /* set offset and service, copy command to DPMEM */
    if (ha->type == GDT_PCI) {
        dp6_ptr = ha->brd;
        writew(dp_offset + DPMEM_COMMAND_OFFSET,
                    &dp6_ptr->u.ic.comm_queue[cmd_no].offset);
        writew((u16)cmd_ptr->Service,
                    &dp6_ptr->u.ic.comm_queue[cmd_no].serv_id);
        memcpy_toio(&dp6_ptr->u.ic.gdt_dpr_cmd[dp_offset],cmd_ptr,cp_count);
    } else if (ha->type == GDT_PCINEW) {
        dp6c_ptr = ha->brd;
        writew(dp_offset + DPMEM_COMMAND_OFFSET,
                    &dp6c_ptr->u.ic.comm_queue[cmd_no].offset);
        writew((u16)cmd_ptr->Service,
                    &dp6c_ptr->u.ic.comm_queue[cmd_no].serv_id);
        memcpy_toio(&dp6c_ptr->u.ic.gdt_dpr_cmd[dp_offset],cmd_ptr,cp_count);
    } else if (ha->type == GDT_PCIMPR) {
        dp6m_ptr = ha->brd;
        writew(dp_offset + DPMEM_COMMAND_OFFSET,
                    &dp6m_ptr->u.ic.comm_queue[cmd_no].offset);
        writew((u16)cmd_ptr->Service,
                    &dp6m_ptr->u.ic.comm_queue[cmd_no].serv_id);
        memcpy_toio(&dp6m_ptr->u.ic.gdt_dpr_cmd[dp_offset],cmd_ptr,cp_count);
    }
}


static void gdth_release_event(gdth_ha_str *ha)
{
    TRACE(("gdth_release_event() hanum %d\n", ha->hanum));

#ifdef GDTH_STATISTICS
    {
        u32 i,j;
        for (i=0,j=0; j<GDTH_MAXCMDS; ++j) {
            if (ha->cmd_tab[j].cmnd != UNUSED_CMND)
                ++i;
        }
        if (max_index < i) {
            max_index = i;
            TRACE3(("GDT: max_index = %d\n",(u16)i));
        }
    }
#endif

    if (ha->pccb->OpCode == GDT_INIT)
        ha->pccb->Service |= 0x80;

    if (ha->type == GDT_PCI) {
        writeb(0, &((gdt6_dpram_str __iomem *)ha->brd)->io.event);
    } else if (ha->type == GDT_PCINEW) { 
        outb(1, PTR2USHORT(&ha->plx->ldoor_reg));
    } else if (ha->type == GDT_PCIMPR) {
        writeb(1, &((gdt6m_dpram_str __iomem *)ha->brd)->i960r.ldoor_reg);
    }
}

static int gdth_wait(gdth_ha_str *ha, int index, u32 time)
{
    int answer_found = FALSE;
    int wait_index = 0;

    TRACE(("gdth_wait() hanum %d index %d time %d\n", ha->hanum, index, time));

    if (index == 0)
        return 1;                               /* no wait required */

    do {
	__gdth_interrupt(ha, true, &wait_index);
        if (wait_index == index) {
            answer_found = TRUE;
            break;
        }
        gdth_delay(1);
    } while (--time);

    while (gdth_test_busy(ha))
        gdth_delay(0);

    return (answer_found);
}


static int gdth_internal_cmd(gdth_ha_str *ha, u8 service, u16 opcode,
                                            u32 p1, u64 p2, u64 p3)
{
    register gdth_cmd_str *cmd_ptr;
    int retries,index;

    TRACE2(("gdth_internal_cmd() service %d opcode %d\n",service,opcode));

    cmd_ptr = ha->pccb;
    memset((char*)cmd_ptr,0,sizeof(gdth_cmd_str));

    /* make command  */
    for (retries = INIT_RETRIES;;) {
        cmd_ptr->Service          = service;
        cmd_ptr->RequestBuffer    = INTERNAL_CMND;
        if (!(index=gdth_get_cmd_index(ha))) {
            TRACE(("GDT: No free command index found\n"));
            return 0;
        }
        gdth_set_sema0(ha);
        cmd_ptr->OpCode           = opcode;
        cmd_ptr->BoardNode        = LOCALBOARD;
        if (service == CACHESERVICE) {
            if (opcode == GDT_IOCTL) {
                cmd_ptr->u.ioctl.subfunc = p1;
                cmd_ptr->u.ioctl.channel = (u32)p2;
                cmd_ptr->u.ioctl.param_size = (u16)p3;
                cmd_ptr->u.ioctl.p_param = ha->scratch_phys;
            } else {
                if (ha->cache_feat & GDT_64BIT) {
                    cmd_ptr->u.cache64.DeviceNo = (u16)p1;
                    cmd_ptr->u.cache64.BlockNo  = p2;
                } else {
                    cmd_ptr->u.cache.DeviceNo = (u16)p1;
                    cmd_ptr->u.cache.BlockNo  = (u32)p2;
                }
            }
        } else if (service == SCSIRAWSERVICE) {
            if (ha->raw_feat & GDT_64BIT) {
                cmd_ptr->u.raw64.direction  = p1;
                cmd_ptr->u.raw64.bus        = (u8)p2;
                cmd_ptr->u.raw64.target     = (u8)p3;
                cmd_ptr->u.raw64.lun        = (u8)(p3 >> 8);
            } else {
                cmd_ptr->u.raw.direction  = p1;
                cmd_ptr->u.raw.bus        = (u8)p2;
                cmd_ptr->u.raw.target     = (u8)p3;
                cmd_ptr->u.raw.lun        = (u8)(p3 >> 8);
            }
        } else if (service == SCREENSERVICE) {
            if (opcode == GDT_REALTIME) {
                *(u32 *)&cmd_ptr->u.screen.su.data[0] = p1;
                *(u32 *)&cmd_ptr->u.screen.su.data[4] = (u32)p2;
                *(u32 *)&cmd_ptr->u.screen.su.data[8] = (u32)p3;
            }
        }
        ha->cmd_len          = sizeof(gdth_cmd_str);
        ha->cmd_offs_dpmem   = 0;
        ha->cmd_cnt          = 0;
        gdth_copy_command(ha);
        gdth_release_event(ha);
        gdth_delay(20);
        if (!gdth_wait(ha, index, INIT_TIMEOUT)) {
            printk("GDT: Initialization error (timeout service %d)\n",service);
            return 0;
        }
        if (ha->status != S_BSY || --retries == 0)
            break;
        gdth_delay(1);   
    }   
    
    return (ha->status != S_OK ? 0:1);
}
    

/* search for devices */

static int gdth_search_drives(gdth_ha_str *ha)
{
    u16 cdev_cnt, i;
    int ok;
    u32 bus_no, drv_cnt, drv_no, j;
    gdth_getch_str *chn;
    gdth_drlist_str *drl;
    gdth_iochan_str *ioc;
    gdth_raw_iochan_str *iocr;
    gdth_arcdl_str *alst;
    gdth_alist_str *alst2;
    gdth_oem_str_ioctl *oemstr;

    TRACE(("gdth_search_drives() hanum %d\n", ha->hanum));
    ok = 0;

    /* initialize controller services, at first: screen service */
    ha->screen_feat = 0;
    if (!force_dma32) {
        ok = gdth_internal_cmd(ha, SCREENSERVICE, GDT_X_INIT_SCR, 0, 0, 0);
        if (ok)
            ha->screen_feat = GDT_64BIT;
    }
    if (force_dma32 || (!ok && ha->status == (u16)S_NOFUNC))
        ok = gdth_internal_cmd(ha, SCREENSERVICE, GDT_INIT, 0, 0, 0);
    if (!ok) {
        printk("GDT-HA %d: Initialization error screen service (code %d)\n",
               ha->hanum, ha->status);
        return 0;
    }
    TRACE2(("gdth_search_drives(): SCREENSERVICE initialized\n"));

    /* unfreeze all IOs */
    gdth_internal_cmd(ha, CACHESERVICE, GDT_UNFREEZE_IO, 0, 0, 0);
 
    /* initialize cache service */
    ha->cache_feat = 0;
    if (!force_dma32) {
        ok = gdth_internal_cmd(ha, CACHESERVICE, GDT_X_INIT_HOST, LINUX_OS,
                                                                         0, 0);
        if (ok)
            ha->cache_feat = GDT_64BIT;
    }
    if (force_dma32 || (!ok && ha->status == (u16)S_NOFUNC))
        ok = gdth_internal_cmd(ha, CACHESERVICE, GDT_INIT, LINUX_OS, 0, 0);
    if (!ok) {
        printk("GDT-HA %d: Initialization error cache service (code %d)\n",
               ha->hanum, ha->status);
        return 0;
    }
    TRACE2(("gdth_search_drives(): CACHESERVICE initialized\n"));
    cdev_cnt = (u16)ha->info;
    ha->fw_vers = ha->service;

    /* detect number of buses - try new IOCTL */
    iocr = (gdth_raw_iochan_str *)ha->pscratch;
    iocr->hdr.version        = 0xffffffff;
    iocr->hdr.list_entries   = MAXBUS;
    iocr->hdr.first_chan     = 0;
    iocr->hdr.last_chan      = MAXBUS-1;
    iocr->hdr.list_offset    = GDTOFFSOF(gdth_raw_iochan_str, list[0]);
    if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL, IOCHAN_RAW_DESC,
                          INVALID_CHANNEL,sizeof(gdth_raw_iochan_str))) {
        TRACE2(("IOCHAN_RAW_DESC supported!\n"));
        ha->bus_cnt = iocr->hdr.chan_count;
        for (bus_no = 0; bus_no < ha->bus_cnt; ++bus_no) {
            if (iocr->list[bus_no].proc_id < MAXID)
                ha->bus_id[bus_no] = iocr->list[bus_no].proc_id;
            else
                ha->bus_id[bus_no] = 0xff;
        }
    } else {
        /* old method */
        chn = (gdth_getch_str *)ha->pscratch;
        for (bus_no = 0; bus_no < MAXBUS; ++bus_no) {
            chn->channel_no = bus_no;
            if (!gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL,
                                   SCSI_CHAN_CNT | L_CTRL_PATTERN,
                                   IO_CHANNEL | INVALID_CHANNEL,
                                   sizeof(gdth_getch_str))) {
                if (bus_no == 0) {
                    printk("GDT-HA %d: Error detecting channel count (0x%x)\n",
                           ha->hanum, ha->status);
                    return 0;
                }
                break;
            }
            if (chn->siop_id < MAXID)
                ha->bus_id[bus_no] = chn->siop_id;
            else
                ha->bus_id[bus_no] = 0xff;
        }       
        ha->bus_cnt = (u8)bus_no;
    }
    TRACE2(("gdth_search_drives() %d channels\n",ha->bus_cnt));

    /* read cache configuration */
    if (!gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL, CACHE_INFO,
                           INVALID_CHANNEL,sizeof(gdth_cinfo_str))) {
        printk("GDT-HA %d: Initialization error cache service (code %d)\n",
               ha->hanum, ha->status);
        return 0;
    }
    ha->cpar = ((gdth_cinfo_str *)ha->pscratch)->cpar;
    TRACE2(("gdth_search_drives() cinfo: vs %x sta %d str %d dw %d b %d\n",
            ha->cpar.version,ha->cpar.state,ha->cpar.strategy,
            ha->cpar.write_back,ha->cpar.block_size));

    /* read board info and features */
    ha->more_proc = FALSE;
    if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL, BOARD_INFO,
                          INVALID_CHANNEL,sizeof(gdth_binfo_str))) {
        memcpy(&ha->binfo, (gdth_binfo_str *)ha->pscratch,
               sizeof(gdth_binfo_str));
        if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL, BOARD_FEATURES,
                              INVALID_CHANNEL,sizeof(gdth_bfeat_str))) {
            TRACE2(("BOARD_INFO/BOARD_FEATURES supported\n"));
            ha->bfeat = *(gdth_bfeat_str *)ha->pscratch;
            ha->more_proc = TRUE;
        }
    } else {
        TRACE2(("BOARD_INFO requires firmware >= 1.10/2.08\n"));
        strcpy(ha->binfo.type_string, gdth_ctr_name(ha));
    }
    TRACE2(("Controller name: %s\n",ha->binfo.type_string));

    /* read more informations */
    if (ha->more_proc) {
        /* physical drives, channel addresses */
        ioc = (gdth_iochan_str *)ha->pscratch;
        ioc->hdr.version        = 0xffffffff;
        ioc->hdr.list_entries   = MAXBUS;
        ioc->hdr.first_chan     = 0;
        ioc->hdr.last_chan      = MAXBUS-1;
        ioc->hdr.list_offset    = GDTOFFSOF(gdth_iochan_str, list[0]);
        if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL, IOCHAN_DESC,
                              INVALID_CHANNEL,sizeof(gdth_iochan_str))) {
            for (bus_no = 0; bus_no < ha->bus_cnt; ++bus_no) {
                ha->raw[bus_no].address = ioc->list[bus_no].address;
                ha->raw[bus_no].local_no = ioc->list[bus_no].local_no;
            }
        } else {
            for (bus_no = 0; bus_no < ha->bus_cnt; ++bus_no) {
                ha->raw[bus_no].address = IO_CHANNEL;
                ha->raw[bus_no].local_no = bus_no;
            }
        }
        for (bus_no = 0; bus_no < ha->bus_cnt; ++bus_no) {
            chn = (gdth_getch_str *)ha->pscratch;
            chn->channel_no = ha->raw[bus_no].local_no;
            if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL,
                                  SCSI_CHAN_CNT | L_CTRL_PATTERN,
                                  ha->raw[bus_no].address | INVALID_CHANNEL,
                                  sizeof(gdth_getch_str))) {
                ha->raw[bus_no].pdev_cnt = chn->drive_cnt;
                TRACE2(("Channel %d: %d phys. drives\n",
                        bus_no,chn->drive_cnt));
            }
            if (ha->raw[bus_no].pdev_cnt > 0) {
                drl = (gdth_drlist_str *)ha->pscratch;
                drl->sc_no = ha->raw[bus_no].local_no;
                drl->sc_cnt = ha->raw[bus_no].pdev_cnt;
                if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL,
                                      SCSI_DR_LIST | L_CTRL_PATTERN,
                                      ha->raw[bus_no].address | INVALID_CHANNEL,
                                      sizeof(gdth_drlist_str))) {
                    for (j = 0; j < ha->raw[bus_no].pdev_cnt; ++j) 
                        ha->raw[bus_no].id_list[j] = drl->sc_list[j];
                } else {
                    ha->raw[bus_no].pdev_cnt = 0;
                }
            }
        }

        /* logical drives */
        if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL, CACHE_DRV_CNT,
                              INVALID_CHANNEL,sizeof(u32))) {
            drv_cnt = *(u32 *)ha->pscratch;
            if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL, CACHE_DRV_LIST,
                                  INVALID_CHANNEL,drv_cnt * sizeof(u32))) {
                for (j = 0; j < drv_cnt; ++j) {
                    drv_no = ((u32 *)ha->pscratch)[j];
                    if (drv_no < MAX_LDRIVES) {
                        ha->hdr[drv_no].is_logdrv = TRUE;
                        TRACE2(("Drive %d is log. drive\n",drv_no));
                    }
                }
            }
            alst = (gdth_arcdl_str *)ha->pscratch;
            alst->entries_avail = MAX_LDRIVES;
            alst->first_entry = 0;
            alst->list_offset = GDTOFFSOF(gdth_arcdl_str, list[0]);
            if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL,
                                  ARRAY_DRV_LIST2 | LA_CTRL_PATTERN, 
                                  INVALID_CHANNEL, sizeof(gdth_arcdl_str) +
                                  (alst->entries_avail-1) * sizeof(gdth_alist_str))) { 
                for (j = 0; j < alst->entries_init; ++j) {
                    ha->hdr[j].is_arraydrv = alst->list[j].is_arrayd;
                    ha->hdr[j].is_master = alst->list[j].is_master;
                    ha->hdr[j].is_parity = alst->list[j].is_parity;
                    ha->hdr[j].is_hotfix = alst->list[j].is_hotfix;
                    ha->hdr[j].master_no = alst->list[j].cd_handle;
                }
            } else if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL,
                                         ARRAY_DRV_LIST | LA_CTRL_PATTERN,
                                         0, 35 * sizeof(gdth_alist_str))) {
                for (j = 0; j < 35; ++j) {
                    alst2 = &((gdth_alist_str *)ha->pscratch)[j];
                    ha->hdr[j].is_arraydrv = alst2->is_arrayd;
                    ha->hdr[j].is_master = alst2->is_master;
                    ha->hdr[j].is_parity = alst2->is_parity;
                    ha->hdr[j].is_hotfix = alst2->is_hotfix;
                    ha->hdr[j].master_no = alst2->cd_handle;
                }
            }
        }
    }       
                                  
    /* initialize raw service */
    ha->raw_feat = 0;
    if (!force_dma32) {
        ok = gdth_internal_cmd(ha, SCSIRAWSERVICE, GDT_X_INIT_RAW, 0, 0, 0);
        if (ok)
            ha->raw_feat = GDT_64BIT;
    }
    if (force_dma32 || (!ok && ha->status == (u16)S_NOFUNC))
        ok = gdth_internal_cmd(ha, SCSIRAWSERVICE, GDT_INIT, 0, 0, 0);
    if (!ok) {
        printk("GDT-HA %d: Initialization error raw service (code %d)\n",
               ha->hanum, ha->status);
        return 0;
    }
    TRACE2(("gdth_search_drives(): RAWSERVICE initialized\n"));

    /* set/get features raw service (scatter/gather) */
    if (gdth_internal_cmd(ha, SCSIRAWSERVICE, GDT_SET_FEAT, SCATTER_GATHER,
                          0, 0)) {
        TRACE2(("gdth_search_drives(): set features RAWSERVICE OK\n"));
        if (gdth_internal_cmd(ha, SCSIRAWSERVICE, GDT_GET_FEAT, 0, 0, 0)) {
            TRACE2(("gdth_search_dr(): get feat RAWSERVICE %d\n",
                    ha->info));
            ha->raw_feat |= (u16)ha->info;
        }
    } 

    /* set/get features cache service (equal to raw service) */
    if (gdth_internal_cmd(ha, CACHESERVICE, GDT_SET_FEAT, 0,
                          SCATTER_GATHER,0)) {
        TRACE2(("gdth_search_drives(): set features CACHESERVICE OK\n"));
        if (gdth_internal_cmd(ha, CACHESERVICE, GDT_GET_FEAT, 0, 0, 0)) {
            TRACE2(("gdth_search_dr(): get feat CACHESERV. %d\n",
                    ha->info));
            ha->cache_feat |= (u16)ha->info;
        }
    }

    /* reserve drives for raw service */
    if (reserve_mode != 0) {
        gdth_internal_cmd(ha, SCSIRAWSERVICE, GDT_RESERVE_ALL,
                          reserve_mode == 1 ? 1 : 3, 0, 0);
        TRACE2(("gdth_search_drives(): RESERVE_ALL code %d\n", 
                ha->status));
    }
    for (i = 0; i < MAX_RES_ARGS; i += 4) {
        if (reserve_list[i] == ha->hanum && reserve_list[i+1] < ha->bus_cnt &&
            reserve_list[i+2] < ha->tid_cnt && reserve_list[i+3] < MAXLUN) {
            TRACE2(("gdth_search_drives(): reserve ha %d bus %d id %d lun %d\n",
                    reserve_list[i], reserve_list[i+1],
                    reserve_list[i+2], reserve_list[i+3]));
            if (!gdth_internal_cmd(ha, SCSIRAWSERVICE, GDT_RESERVE, 0,
                                   reserve_list[i+1], reserve_list[i+2] | 
                                   (reserve_list[i+3] << 8))) {
                printk("GDT-HA %d: Error raw service (RESERVE, code %d)\n",
                       ha->hanum, ha->status);
             }
        }
    }

    /* Determine OEM string using IOCTL */
    oemstr = (gdth_oem_str_ioctl *)ha->pscratch;
    oemstr->params.ctl_version = 0x01;
    oemstr->params.buffer_size = sizeof(oemstr->text);
    if (gdth_internal_cmd(ha, CACHESERVICE, GDT_IOCTL,
                          CACHE_READ_OEM_STRING_RECORD,INVALID_CHANNEL,
                          sizeof(gdth_oem_str_ioctl))) {
        TRACE2(("gdth_search_drives(): CACHE_READ_OEM_STRING_RECORD OK\n"));
        printk("GDT-HA %d: Vendor: %s Name: %s\n",
               ha->hanum, oemstr->text.oem_company_name, ha->binfo.type_string);
        /* Save the Host Drive inquiry data */
        strlcpy(ha->oem_name,oemstr->text.scsi_host_drive_inquiry_vendor_id,
                sizeof(ha->oem_name));
    } else {
        /* Old method, based on PCI ID */
        TRACE2(("gdth_search_drives(): CACHE_READ_OEM_STRING_RECORD failed\n"));
        printk("GDT-HA %d: Name: %s\n",
               ha->hanum, ha->binfo.type_string);
        if (ha->oem_id == OEM_ID_INTEL)
            strlcpy(ha->oem_name,"Intel  ", sizeof(ha->oem_name));
        else
            strlcpy(ha->oem_name,"ICP    ", sizeof(ha->oem_name));
    }

    /* scanning for host drives */
    for (i = 0; i < cdev_cnt; ++i) 
        gdth_analyse_hdrive(ha, i);
    
    TRACE(("gdth_search_drives() OK\n"));
    return 1;
}

static int gdth_analyse_hdrive(gdth_ha_str *ha, u16 hdrive)
{
    u32 drv_cyls;
    int drv_hds, drv_secs;

    TRACE(("gdth_analyse_hdrive() hanum %d drive %d\n", ha->hanum, hdrive));
    if (hdrive >= MAX_HDRIVES)
        return 0;

    if (!gdth_internal_cmd(ha, CACHESERVICE, GDT_INFO, hdrive, 0, 0))
        return 0;
    ha->hdr[hdrive].present = TRUE;
    ha->hdr[hdrive].size = ha->info;
   
    /* evaluate mapping (sectors per head, heads per cylinder) */
    ha->hdr[hdrive].size &= ~SECS32;
    if (ha->info2 == 0) {
        gdth_eval_mapping(ha->hdr[hdrive].size,&drv_cyls,&drv_hds,&drv_secs);
    } else {
        drv_hds = ha->info2 & 0xff;
        drv_secs = (ha->info2 >> 8) & 0xff;
        drv_cyls = (u32)ha->hdr[hdrive].size / drv_hds / drv_secs;
    }
    ha->hdr[hdrive].heads = (u8)drv_hds;
    ha->hdr[hdrive].secs  = (u8)drv_secs;
    /* round size */
    ha->hdr[hdrive].size  = drv_cyls * drv_hds * drv_secs;
    
    if (ha->cache_feat & GDT_64BIT) {
        if (gdth_internal_cmd(ha, CACHESERVICE, GDT_X_INFO, hdrive, 0, 0)
            && ha->info2 != 0) {
            ha->hdr[hdrive].size = ((u64)ha->info2 << 32) | ha->info;
        }
    }
    TRACE2(("gdth_search_dr() cdr. %d size %d hds %d scs %d\n",
            hdrive,ha->hdr[hdrive].size,drv_hds,drv_secs));

    /* get informations about device */
    if (gdth_internal_cmd(ha, CACHESERVICE, GDT_DEVTYPE, hdrive, 0, 0)) {
        TRACE2(("gdth_search_dr() cache drive %d devtype %d\n",
                hdrive,ha->info));
        ha->hdr[hdrive].devtype = (u16)ha->info;
    }

    /* cluster info */
    if (gdth_internal_cmd(ha, CACHESERVICE, GDT_CLUST_INFO, hdrive, 0, 0)) {
        TRACE2(("gdth_search_dr() cache drive %d cluster info %d\n",
                hdrive,ha->info));
        if (!shared_access)
            ha->hdr[hdrive].cluster_type = (u8)ha->info;
    }

    /* R/W attributes */
    if (gdth_internal_cmd(ha, CACHESERVICE, GDT_RW_ATTRIBS, hdrive, 0, 0)) {
        TRACE2(("gdth_search_dr() cache drive %d r/w attrib. %d\n",
                hdrive,ha->info));
        ha->hdr[hdrive].rw_attribs = (u8)ha->info;
    }

    return 1;
}


/* command queueing/sending functions */

static void gdth_putq(gdth_ha_str *ha, struct scsi_cmnd *scp, u8 priority)
{
    struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
    register struct scsi_cmnd *pscp;
    register struct scsi_cmnd *nscp;
    unsigned long flags;

    TRACE(("gdth_putq() priority %d\n",priority));
    spin_lock_irqsave(&ha->smp_lock, flags);

    if (!cmndinfo->internal_command)
        cmndinfo->priority = priority;

    if (ha->req_first==NULL) {
        ha->req_first = scp;                    /* queue was empty */
        scp->SCp.ptr = NULL;
    } else {                                    /* queue not empty */
        pscp = ha->req_first;
        nscp = (struct scsi_cmnd *)pscp->SCp.ptr;
        /* priority: 0-highest,..,0xff-lowest */
        while (nscp && gdth_cmnd_priv(nscp)->priority <= priority) {
            pscp = nscp;
            nscp = (struct scsi_cmnd *)pscp->SCp.ptr;
        }
        pscp->SCp.ptr = (char *)scp;
        scp->SCp.ptr  = (char *)nscp;
    }
    spin_unlock_irqrestore(&ha->smp_lock, flags);

#ifdef GDTH_STATISTICS
    flags = 0;
    for (nscp=ha->req_first; nscp; nscp=(struct scsi_cmnd*)nscp->SCp.ptr)
        ++flags;
    if (max_rq < flags) {
        max_rq = flags;
        TRACE3(("GDT: max_rq = %d\n",(u16)max_rq));
    }
#endif
}

static void gdth_next(gdth_ha_str *ha)
{
    register struct scsi_cmnd *pscp;
    register struct scsi_cmnd *nscp;
    u8 b, t, l, firsttime;
    u8 this_cmd, next_cmd;
    unsigned long flags = 0;
    int cmd_index;

    TRACE(("gdth_next() hanum %d\n", ha->hanum));
    if (!gdth_polling) 
        spin_lock_irqsave(&ha->smp_lock, flags);

    ha->cmd_cnt = ha->cmd_offs_dpmem = 0;
    this_cmd = firsttime = TRUE;
    next_cmd = gdth_polling ? FALSE:TRUE;
    cmd_index = 0;

    for (nscp = pscp = ha->req_first; nscp; nscp = (struct scsi_cmnd *)nscp->SCp.ptr) {
        struct gdth_cmndinfo *nscp_cmndinfo = gdth_cmnd_priv(nscp);
        if (nscp != pscp && nscp != (struct scsi_cmnd *)pscp->SCp.ptr)
            pscp = (struct scsi_cmnd *)pscp->SCp.ptr;
        if (!nscp_cmndinfo->internal_command) {
            b = nscp->device->channel;
            t = nscp->device->id;
            l = nscp->device->lun;
            if (nscp_cmndinfo->priority >= DEFAULT_PRI) {
                if ((b != ha->virt_bus && ha->raw[BUS_L2P(ha,b)].lock) ||
                    (b == ha->virt_bus && t < MAX_HDRIVES && ha->hdr[t].lock))
                    continue;
            }
        } else
            b = t = l = 0;

        if (firsttime) {
            if (gdth_test_busy(ha)) {        /* controller busy ? */
                TRACE(("gdth_next() controller %d busy !\n", ha->hanum));
                if (!gdth_polling) {
                    spin_unlock_irqrestore(&ha->smp_lock, flags);
                    return;
                }
                while (gdth_test_busy(ha))
                    gdth_delay(1);
            }   
            firsttime = FALSE;
        }

        if (!nscp_cmndinfo->internal_command) {
        if (nscp_cmndinfo->phase == -1) {
            nscp_cmndinfo->phase = CACHESERVICE;           /* default: cache svc. */
            if (nscp->cmnd[0] == TEST_UNIT_READY) {
                TRACE2(("TEST_UNIT_READY Bus %d Id %d LUN %d\n", 
                        b, t, l));
                /* TEST_UNIT_READY -> set scan mode */
                if ((ha->scan_mode & 0x0f) == 0) {
                    if (b == 0 && t == 0 && l == 0) {
                        ha->scan_mode |= 1;
                        TRACE2(("Scan mode: 0x%x\n", ha->scan_mode));
                    }
                } else if ((ha->scan_mode & 0x0f) == 1) {
                    if (b == 0 && ((t == 0 && l == 1) ||
                         (t == 1 && l == 0))) {
                        nscp_cmndinfo->OpCode = GDT_SCAN_START;
                        nscp_cmndinfo->phase = ((ha->scan_mode & 0x10 ? 1:0) << 8)
                            | SCSIRAWSERVICE;
                        ha->scan_mode = 0x12;
                        TRACE2(("Scan mode: 0x%x (SCAN_START)\n", 
                                ha->scan_mode));
                    } else {
                        ha->scan_mode &= 0x10;
                        TRACE2(("Scan mode: 0x%x\n", ha->scan_mode));
                    }                   
                } else if (ha->scan_mode == 0x12) {
                    if (b == ha->bus_cnt && t == ha->tid_cnt-1) {
                        nscp_cmndinfo->phase = SCSIRAWSERVICE;
                        nscp_cmndinfo->OpCode = GDT_SCAN_END;
                        ha->scan_mode &= 0x10;
                        TRACE2(("Scan mode: 0x%x (SCAN_END)\n", 
                                ha->scan_mode));
                    }
                }
            }
            if (b == ha->virt_bus && nscp->cmnd[0] != INQUIRY &&
                nscp->cmnd[0] != READ_CAPACITY && nscp->cmnd[0] != MODE_SENSE &&
                (ha->hdr[t].cluster_type & CLUSTER_DRIVE)) {
                /* always GDT_CLUST_INFO! */
                nscp_cmndinfo->OpCode = GDT_CLUST_INFO;
            }
        }
        }

        if (nscp_cmndinfo->OpCode != -1) {
            if ((nscp_cmndinfo->phase & 0xff) == CACHESERVICE) {
                if (!(cmd_index=gdth_fill_cache_cmd(ha, nscp, t)))
                    this_cmd = FALSE;
                next_cmd = FALSE;
            } else if ((nscp_cmndinfo->phase & 0xff) == SCSIRAWSERVICE) {
                if (!(cmd_index=gdth_fill_raw_cmd(ha, nscp, BUS_L2P(ha, b))))
                    this_cmd = FALSE;
                next_cmd = FALSE;
            } else {
                memset((char*)nscp->sense_buffer,0,16);
                nscp->sense_buffer[0] = 0x70;
                nscp->sense_buffer[2] = NOT_READY;
                nscp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
                if (!nscp_cmndinfo->wait_for_completion)
                    nscp_cmndinfo->wait_for_completion++;
                else
                    gdth_scsi_done(nscp);
            }
        } else if (gdth_cmnd_priv(nscp)->internal_command) {
            if (!(cmd_index=gdth_special_cmd(ha, nscp)))
                this_cmd = FALSE;
            next_cmd = FALSE;
        } else if (b != ha->virt_bus) {
            if (ha->raw[BUS_L2P(ha,b)].io_cnt[t] >= GDTH_MAX_RAW ||
                !(cmd_index=gdth_fill_raw_cmd(ha, nscp, BUS_L2P(ha, b))))
                this_cmd = FALSE;
            else 
                ha->raw[BUS_L2P(ha,b)].io_cnt[t]++;
        } else if (t >= MAX_HDRIVES || !ha->hdr[t].present || l != 0) {
            TRACE2(("Command 0x%x to bus %d id %d lun %d -> IGNORE\n",
                    nscp->cmnd[0], b, t, l));
            nscp->result = DID_BAD_TARGET << 16;
            if (!nscp_cmndinfo->wait_for_completion)
                nscp_cmndinfo->wait_for_completion++;
            else
                gdth_scsi_done(nscp);
        } else {
            switch (nscp->cmnd[0]) {
              case TEST_UNIT_READY:
              case INQUIRY:
              case REQUEST_SENSE:
              case READ_CAPACITY:
              case VERIFY:
              case START_STOP:
              case MODE_SENSE:
              case SERVICE_ACTION_IN_16:
                TRACE(("cache cmd %x/%x/%x/%x/%x/%x\n",nscp->cmnd[0],
                       nscp->cmnd[1],nscp->cmnd[2],nscp->cmnd[3],
                       nscp->cmnd[4],nscp->cmnd[5]));
                if (ha->hdr[t].media_changed && nscp->cmnd[0] != INQUIRY) {
                    /* return UNIT_ATTENTION */
                    TRACE2(("cmd 0x%x target %d: UNIT_ATTENTION\n",
                             nscp->cmnd[0], t));
                    ha->hdr[t].media_changed = FALSE;
                    memset((char*)nscp->sense_buffer,0,16);
                    nscp->sense_buffer[0] = 0x70;
                    nscp->sense_buffer[2] = UNIT_ATTENTION;
                    nscp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
                    if (!nscp_cmndinfo->wait_for_completion)
                        nscp_cmndinfo->wait_for_completion++;
                    else
                        gdth_scsi_done(nscp);
                } else if (gdth_internal_cache_cmd(ha, nscp))
                    gdth_scsi_done(nscp);
                break;

              case ALLOW_MEDIUM_REMOVAL:
                TRACE(("cache cmd %x/%x/%x/%x/%x/%x\n",nscp->cmnd[0],
                       nscp->cmnd[1],nscp->cmnd[2],nscp->cmnd[3],
                       nscp->cmnd[4],nscp->cmnd[5]));
                if ( (nscp->cmnd[4]&1) && !(ha->hdr[t].devtype&1) ) {
                    TRACE(("Prevent r. nonremov. drive->do nothing\n"));
                    nscp->result = DID_OK << 16;
                    nscp->sense_buffer[0] = 0;
                    if (!nscp_cmndinfo->wait_for_completion)
                        nscp_cmndinfo->wait_for_completion++;
                    else
                        gdth_scsi_done(nscp);
                } else {
                    nscp->cmnd[3] = (ha->hdr[t].devtype&1) ? 1:0;
                    TRACE(("Prevent/allow r. %d rem. drive %d\n",
                           nscp->cmnd[4],nscp->cmnd[3]));
                    if (!(cmd_index=gdth_fill_cache_cmd(ha, nscp, t)))
                        this_cmd = FALSE;
                }
                break;
                
              case RESERVE:
              case RELEASE:
                TRACE2(("cache cmd %s\n",nscp->cmnd[0] == RESERVE ?
                        "RESERVE" : "RELEASE"));
                if (!(cmd_index=gdth_fill_cache_cmd(ha, nscp, t)))
                    this_cmd = FALSE;
                break;
                
              case READ_6:
              case WRITE_6:
              case READ_10:
              case WRITE_10:
              case READ_16:
              case WRITE_16:
                if (ha->hdr[t].media_changed) {
                    /* return UNIT_ATTENTION */
                    TRACE2(("cmd 0x%x target %d: UNIT_ATTENTION\n",
                             nscp->cmnd[0], t));
                    ha->hdr[t].media_changed = FALSE;
                    memset((char*)nscp->sense_buffer,0,16);
                    nscp->sense_buffer[0] = 0x70;
                    nscp->sense_buffer[2] = UNIT_ATTENTION;
                    nscp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
                    if (!nscp_cmndinfo->wait_for_completion)
                        nscp_cmndinfo->wait_for_completion++;
                    else
                        gdth_scsi_done(nscp);
                } else if (!(cmd_index=gdth_fill_cache_cmd(ha, nscp, t)))
                    this_cmd = FALSE;
                break;

              default:
                TRACE2(("cache cmd %x/%x/%x/%x/%x/%x unknown\n",nscp->cmnd[0],
                        nscp->cmnd[1],nscp->cmnd[2],nscp->cmnd[3],
                        nscp->cmnd[4],nscp->cmnd[5]));
                printk("GDT-HA %d: Unknown SCSI command 0x%x to cache service !\n",
                       ha->hanum, nscp->cmnd[0]);
                nscp->result = DID_ABORT << 16;
                if (!nscp_cmndinfo->wait_for_completion)
                    nscp_cmndinfo->wait_for_completion++;
                else
                    gdth_scsi_done(nscp);
                break;
            }
        }

        if (!this_cmd)
            break;
        if (nscp == ha->req_first)
            ha->req_first = pscp = (struct scsi_cmnd *)nscp->SCp.ptr;
        else
            pscp->SCp.ptr = nscp->SCp.ptr;
        if (!next_cmd)
            break;
    }

    if (ha->cmd_cnt > 0) {
        gdth_release_event(ha);
    }

    if (!gdth_polling) 
        spin_unlock_irqrestore(&ha->smp_lock, flags);

    if (gdth_polling && ha->cmd_cnt > 0) {
        if (!gdth_wait(ha, cmd_index, POLL_TIMEOUT))
            printk("GDT-HA %d: Command %d timed out !\n",
                   ha->hanum, cmd_index);
    }
}

/*
 * gdth_copy_internal_data() - copy to/from a buffer onto a scsi_cmnd's
 * buffers, kmap_atomic() as needed.
 */
static void gdth_copy_internal_data(gdth_ha_str *ha, struct scsi_cmnd *scp,
                                    char *buffer, u16 count)
{
    u16 cpcount,i, max_sg = scsi_sg_count(scp);
    u16 cpsum,cpnow;
    struct scatterlist *sl;
    char *address;

    cpcount = min_t(u16, count, scsi_bufflen(scp));

    if (cpcount) {
        cpsum=0;
        scsi_for_each_sg(scp, sl, max_sg, i) {
            unsigned long flags;
            cpnow = (u16)sl->length;
            TRACE(("copy_internal() now %d sum %d count %d %d\n",
                          cpnow, cpsum, cpcount, scsi_bufflen(scp)));
            if (cpsum+cpnow > cpcount) 
                cpnow = cpcount - cpsum;
            cpsum += cpnow;
            if (!sg_page(sl)) {
                printk("GDT-HA %d: invalid sc/gt element in gdth_copy_internal_data()\n",
                       ha->hanum);
                return;
            }
            local_irq_save(flags);
            address = kmap_atomic(sg_page(sl)) + sl->offset;
            memcpy(address, buffer, cpnow);
            flush_dcache_page(sg_page(sl));
            kunmap_atomic(address);
            local_irq_restore(flags);
            if (cpsum == cpcount)
                break;
            buffer += cpnow;
        }
    } else if (count) {
        printk("GDT-HA %d: SCSI command with no buffers but data transfer expected!\n",
               ha->hanum);
        WARN_ON(1);
    }
}

static int gdth_internal_cache_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp)
{
    u8 t;
    gdth_inq_data inq;
    gdth_rdcap_data rdc;
    gdth_sense_data sd;
    gdth_modep_data mpd;
    struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);

    t  = scp->device->id;
    TRACE(("gdth_internal_cache_cmd() cmd 0x%x hdrive %d\n",
           scp->cmnd[0],t));

    scp->result = DID_OK << 16;
    scp->sense_buffer[0] = 0;

    switch (scp->cmnd[0]) {
      case TEST_UNIT_READY:
      case VERIFY:
      case START_STOP:
        TRACE2(("Test/Verify/Start hdrive %d\n",t));
        break;

      case INQUIRY:
        TRACE2(("Inquiry hdrive %d devtype %d\n",
                t,ha->hdr[t].devtype));
        inq.type_qual = (ha->hdr[t].devtype&4) ? TYPE_ROM:TYPE_DISK;
        /* you can here set all disks to removable, if you want to do
           a flush using the ALLOW_MEDIUM_REMOVAL command */
        inq.modif_rmb = 0x00;
        if ((ha->hdr[t].devtype & 1) ||
            (ha->hdr[t].cluster_type & CLUSTER_DRIVE))
            inq.modif_rmb = 0x80;
        inq.version   = 2;
        inq.resp_aenc = 2;
        inq.add_length= 32;
        strcpy(inq.vendor,ha->oem_name);
        snprintf(inq.product, sizeof(inq.product), "Host Drive  #%02d",t);
        strcpy(inq.revision,"   ");
        gdth_copy_internal_data(ha, scp, (char*)&inq, sizeof(gdth_inq_data));
        break;

      case REQUEST_SENSE:
        TRACE2(("Request sense hdrive %d\n",t));
        sd.errorcode = 0x70;
        sd.segno     = 0x00;
        sd.key       = NO_SENSE;
        sd.info      = 0;
        sd.add_length= 0;
        gdth_copy_internal_data(ha, scp, (char*)&sd, sizeof(gdth_sense_data));
        break;

      case MODE_SENSE:
        TRACE2(("Mode sense hdrive %d\n",t));
        memset((char*)&mpd,0,sizeof(gdth_modep_data));
        mpd.hd.data_length = sizeof(gdth_modep_data);
        mpd.hd.dev_par     = (ha->hdr[t].devtype&2) ? 0x80:0;
        mpd.hd.bd_length   = sizeof(mpd.bd);
        mpd.bd.block_length[0] = (SECTOR_SIZE & 0x00ff0000) >> 16;
        mpd.bd.block_length[1] = (SECTOR_SIZE & 0x0000ff00) >> 8;
        mpd.bd.block_length[2] = (SECTOR_SIZE & 0x000000ff);
        gdth_copy_internal_data(ha, scp, (char*)&mpd, sizeof(gdth_modep_data));
        break;

      case READ_CAPACITY:
        TRACE2(("Read capacity hdrive %d\n",t));
        if (ha->hdr[t].size > (u64)0xffffffff)
            rdc.last_block_no = 0xffffffff;
        else
            rdc.last_block_no = cpu_to_be32(ha->hdr[t].size-1);
        rdc.block_length  = cpu_to_be32(SECTOR_SIZE);
        gdth_copy_internal_data(ha, scp, (char*)&rdc, sizeof(gdth_rdcap_data));
        break;

      case SERVICE_ACTION_IN_16:
        if ((scp->cmnd[1] & 0x1f) == SAI_READ_CAPACITY_16 &&
            (ha->cache_feat & GDT_64BIT)) {
            gdth_rdcap16_data rdc16;

            TRACE2(("Read capacity (16) hdrive %d\n",t));
            rdc16.last_block_no = cpu_to_be64(ha->hdr[t].size-1);
            rdc16.block_length  = cpu_to_be32(SECTOR_SIZE);
            gdth_copy_internal_data(ha, scp, (char*)&rdc16,
                                                 sizeof(gdth_rdcap16_data));
        } else { 
            scp->result = DID_ABORT << 16;
        }
        break;

      default:
        TRACE2(("Internal cache cmd 0x%x unknown\n",scp->cmnd[0]));
        break;
    }

    if (!cmndinfo->wait_for_completion)
        cmndinfo->wait_for_completion++;
    else 
        return 1;

    return 0;
}

static int gdth_fill_cache_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp,
                               u16 hdrive)
{
    register gdth_cmd_str *cmdp;
    struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
    u32 cnt, blockcnt;
    u64 no, blockno;
    int i, cmd_index, read_write, sgcnt, mode64;

    cmdp = ha->pccb;
    TRACE(("gdth_fill_cache_cmd() cmd 0x%x cmdsize %d hdrive %d\n",
                 scp->cmnd[0],scp->cmd_len,hdrive));

    mode64 = (ha->cache_feat & GDT_64BIT) ? TRUE : FALSE;
    /* test for READ_16, WRITE_16 if !mode64 ? ---
       not required, should not occur due to error return on 
       READ_CAPACITY_16 */

    cmdp->Service = CACHESERVICE;
    cmdp->RequestBuffer = scp;
    /* search free command index */
    if (!(cmd_index=gdth_get_cmd_index(ha))) {
        TRACE(("GDT: No free command index found\n"));
        return 0;
    }
    /* if it's the first command, set command semaphore */
    if (ha->cmd_cnt == 0)
        gdth_set_sema0(ha);

    /* fill command */
    read_write = 0;
    if (cmndinfo->OpCode != -1)
        cmdp->OpCode = cmndinfo->OpCode;   /* special cache cmd. */
    else if (scp->cmnd[0] == RESERVE) 
        cmdp->OpCode = GDT_RESERVE_DRV;
    else if (scp->cmnd[0] == RELEASE)
        cmdp->OpCode = GDT_RELEASE_DRV;
    else if (scp->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
        if (scp->cmnd[4] & 1)                   /* prevent ? */
            cmdp->OpCode = GDT_MOUNT;
        else if (scp->cmnd[3] & 1)              /* removable drive ? */
            cmdp->OpCode = GDT_UNMOUNT;
        else
            cmdp->OpCode = GDT_FLUSH;
    } else if (scp->cmnd[0] == WRITE_6 || scp->cmnd[0] == WRITE_10 ||
               scp->cmnd[0] == WRITE_12 || scp->cmnd[0] == WRITE_16
    ) {
        read_write = 1;
        if (gdth_write_through || ((ha->hdr[hdrive].rw_attribs & 1) && 
                                   (ha->cache_feat & GDT_WR_THROUGH)))
            cmdp->OpCode = GDT_WRITE_THR;
        else
            cmdp->OpCode = GDT_WRITE;
    } else {
        read_write = 2;
        cmdp->OpCode = GDT_READ;
    }

    cmdp->BoardNode = LOCALBOARD;
    if (mode64) {
        cmdp->u.cache64.DeviceNo = hdrive;
        cmdp->u.cache64.BlockNo  = 1;
        cmdp->u.cache64.sg_canz  = 0;
    } else {
        cmdp->u.cache.DeviceNo = hdrive;
        cmdp->u.cache.BlockNo  = 1;
        cmdp->u.cache.sg_canz  = 0;
    }

    if (read_write) {
        if (scp->cmd_len == 16) {
            memcpy(&no, &scp->cmnd[2], sizeof(u64));
            blockno = be64_to_cpu(no);
            memcpy(&cnt, &scp->cmnd[10], sizeof(u32));
            blockcnt = be32_to_cpu(cnt);
        } else if (scp->cmd_len == 10) {
            memcpy(&no, &scp->cmnd[2], sizeof(u32));
            blockno = be32_to_cpu(no);
            memcpy(&cnt, &scp->cmnd[7], sizeof(u16));
            blockcnt = be16_to_cpu(cnt);
        } else {
            memcpy(&no, &scp->cmnd[0], sizeof(u32));
            blockno = be32_to_cpu(no) & 0x001fffffUL;
            blockcnt= scp->cmnd[4]==0 ? 0x100 : scp->cmnd[4];
        }
        if (mode64) {
            cmdp->u.cache64.BlockNo = blockno;
            cmdp->u.cache64.BlockCnt = blockcnt;
        } else {
            cmdp->u.cache.BlockNo = (u32)blockno;
            cmdp->u.cache.BlockCnt = blockcnt;
        }

        if (scsi_bufflen(scp)) {
            cmndinfo->dma_dir = (read_write == 1 ?
                DMA_TO_DEVICE : DMA_FROM_DEVICE);
            sgcnt = dma_map_sg(&ha->pdev->dev, scsi_sglist(scp),
			       scsi_sg_count(scp), cmndinfo->dma_dir);
            if (mode64) {
                struct scatterlist *sl;

                cmdp->u.cache64.DestAddr= (u64)-1;
                cmdp->u.cache64.sg_canz = sgcnt;
                scsi_for_each_sg(scp, sl, sgcnt, i) {
                    cmdp->u.cache64.sg_lst[i].sg_ptr = sg_dma_address(sl);
                    cmdp->u.cache64.sg_lst[i].sg_len = sg_dma_len(sl);
                }
            } else {
                struct scatterlist *sl;

                cmdp->u.cache.DestAddr= 0xffffffff;
                cmdp->u.cache.sg_canz = sgcnt;
                scsi_for_each_sg(scp, sl, sgcnt, i) {
                    cmdp->u.cache.sg_lst[i].sg_ptr = sg_dma_address(sl);
                    cmdp->u.cache.sg_lst[i].sg_len = sg_dma_len(sl);
                }
            }

#ifdef GDTH_STATISTICS
            if (max_sg < (u32)sgcnt) {
                max_sg = (u32)sgcnt;
                TRACE3(("GDT: max_sg = %d\n",max_sg));
            }
#endif

        }
    }
    /* evaluate command size, check space */
    if (mode64) {
        TRACE(("cache cmd: addr. %x sganz %x sgptr0 %x sglen0 %x\n",
               cmdp->u.cache64.DestAddr,cmdp->u.cache64.sg_canz,
               cmdp->u.cache64.sg_lst[0].sg_ptr,
               cmdp->u.cache64.sg_lst[0].sg_len));
        TRACE(("cache cmd: cmd %d blockno. %d, blockcnt %d\n",
               cmdp->OpCode,cmdp->u.cache64.BlockNo,cmdp->u.cache64.BlockCnt));
        ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.cache64.sg_lst) +
            (u16)cmdp->u.cache64.sg_canz * sizeof(gdth_sg64_str);
    } else {
        TRACE(("cache cmd: addr. %x sganz %x sgptr0 %x sglen0 %x\n",
               cmdp->u.cache.DestAddr,cmdp->u.cache.sg_canz,
               cmdp->u.cache.sg_lst[0].sg_ptr,
               cmdp->u.cache.sg_lst[0].sg_len));
        TRACE(("cache cmd: cmd %d blockno. %d, blockcnt %d\n",
               cmdp->OpCode,cmdp->u.cache.BlockNo,cmdp->u.cache.BlockCnt));
        ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.cache.sg_lst) +
            (u16)cmdp->u.cache.sg_canz * sizeof(gdth_sg_str);
    }
    if (ha->cmd_len & 3)
        ha->cmd_len += (4 - (ha->cmd_len & 3));

    if (ha->cmd_cnt > 0) {
        if ((ha->cmd_offs_dpmem + ha->cmd_len + DPMEM_COMMAND_OFFSET) >
            ha->ic_all_size) {
            TRACE2(("gdth_fill_cache() DPMEM overflow\n"));
            ha->cmd_tab[cmd_index-2].cmnd = UNUSED_CMND;
            return 0;
        }
    }

    /* copy command */
    gdth_copy_command(ha);
    return cmd_index;
}

static int gdth_fill_raw_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp, u8 b)
{
    register gdth_cmd_str *cmdp;
    u16 i;
    dma_addr_t sense_paddr;
    int cmd_index, sgcnt, mode64;
    u8 t,l;
    struct gdth_cmndinfo *cmndinfo;

    t = scp->device->id;
    l = scp->device->lun;
    cmdp = ha->pccb;
    TRACE(("gdth_fill_raw_cmd() cmd 0x%x bus %d ID %d LUN %d\n",
           scp->cmnd[0],b,t,l));

    mode64 = (ha->raw_feat & GDT_64BIT) ? TRUE : FALSE;

    cmdp->Service = SCSIRAWSERVICE;
    cmdp->RequestBuffer = scp;
    /* search free command index */
    if (!(cmd_index=gdth_get_cmd_index(ha))) {
        TRACE(("GDT: No free command index found\n"));
        return 0;
    }
    /* if it's the first command, set command semaphore */
    if (ha->cmd_cnt == 0)
        gdth_set_sema0(ha);

    cmndinfo = gdth_cmnd_priv(scp);
    /* fill command */  
    if (cmndinfo->OpCode != -1) {
        cmdp->OpCode           = cmndinfo->OpCode; /* special raw cmd. */
        cmdp->BoardNode        = LOCALBOARD;
        if (mode64) {
            cmdp->u.raw64.direction = (cmndinfo->phase >> 8);
            TRACE2(("special raw cmd 0x%x param 0x%x\n", 
                    cmdp->OpCode, cmdp->u.raw64.direction));
            /* evaluate command size */
            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.raw64.sg_lst);
        } else {
            cmdp->u.raw.direction  = (cmndinfo->phase >> 8);
            TRACE2(("special raw cmd 0x%x param 0x%x\n", 
                    cmdp->OpCode, cmdp->u.raw.direction));
            /* evaluate command size */
            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.raw.sg_lst);
        }

    } else {
        sense_paddr = dma_map_single(&ha->pdev->dev, scp->sense_buffer, 16,
				     DMA_FROM_DEVICE);

	cmndinfo->sense_paddr  = sense_paddr;
        cmdp->OpCode           = GDT_WRITE;             /* always */
        cmdp->BoardNode        = LOCALBOARD;
        if (mode64) { 
            cmdp->u.raw64.reserved   = 0;
            cmdp->u.raw64.mdisc_time = 0;
            cmdp->u.raw64.mcon_time  = 0;
            cmdp->u.raw64.clen       = scp->cmd_len;
            cmdp->u.raw64.target     = t;
            cmdp->u.raw64.lun        = l;
            cmdp->u.raw64.bus        = b;
            cmdp->u.raw64.priority   = 0;
            cmdp->u.raw64.sdlen      = scsi_bufflen(scp);
            cmdp->u.raw64.sense_len  = 16;
            cmdp->u.raw64.sense_data = sense_paddr;
            cmdp->u.raw64.direction  = 
                gdth_direction_tab[scp->cmnd[0]]==DOU ? GDTH_DATA_OUT:GDTH_DATA_IN;
            memcpy(cmdp->u.raw64.cmd,scp->cmnd,16);
            cmdp->u.raw64.sg_ranz    = 0;
        } else {
            cmdp->u.raw.reserved   = 0;
            cmdp->u.raw.mdisc_time = 0;
            cmdp->u.raw.mcon_time  = 0;
            cmdp->u.raw.clen       = scp->cmd_len;
            cmdp->u.raw.target     = t;
            cmdp->u.raw.lun        = l;
            cmdp->u.raw.bus        = b;
            cmdp->u.raw.priority   = 0;
            cmdp->u.raw.link_p     = 0;
            cmdp->u.raw.sdlen      = scsi_bufflen(scp);
            cmdp->u.raw.sense_len  = 16;
            cmdp->u.raw.sense_data = sense_paddr;
            cmdp->u.raw.direction  = 
                gdth_direction_tab[scp->cmnd[0]]==DOU ? GDTH_DATA_OUT:GDTH_DATA_IN;
            memcpy(cmdp->u.raw.cmd,scp->cmnd,12);
            cmdp->u.raw.sg_ranz    = 0;
        }

        if (scsi_bufflen(scp)) {
            cmndinfo->dma_dir = DMA_BIDIRECTIONAL;
            sgcnt = dma_map_sg(&ha->pdev->dev, scsi_sglist(scp),
			       scsi_sg_count(scp), cmndinfo->dma_dir);
            if (mode64) {
                struct scatterlist *sl;

                cmdp->u.raw64.sdata = (u64)-1;
                cmdp->u.raw64.sg_ranz = sgcnt;
                scsi_for_each_sg(scp, sl, sgcnt, i) {
                    cmdp->u.raw64.sg_lst[i].sg_ptr = sg_dma_address(sl);
                    cmdp->u.raw64.sg_lst[i].sg_len = sg_dma_len(sl);
                }
            } else {
                struct scatterlist *sl;

                cmdp->u.raw.sdata = 0xffffffff;
                cmdp->u.raw.sg_ranz = sgcnt;
                scsi_for_each_sg(scp, sl, sgcnt, i) {
                    cmdp->u.raw.sg_lst[i].sg_ptr = sg_dma_address(sl);
                    cmdp->u.raw.sg_lst[i].sg_len = sg_dma_len(sl);
                }
            }

#ifdef GDTH_STATISTICS
            if (max_sg < sgcnt) {
                max_sg = sgcnt;
                TRACE3(("GDT: max_sg = %d\n",sgcnt));
            }
#endif

        }
        if (mode64) {
            TRACE(("raw cmd: addr. %x sganz %x sgptr0 %x sglen0 %x\n",
                   cmdp->u.raw64.sdata,cmdp->u.raw64.sg_ranz,
                   cmdp->u.raw64.sg_lst[0].sg_ptr,
                   cmdp->u.raw64.sg_lst[0].sg_len));
            /* evaluate command size */
            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.raw64.sg_lst) +
                (u16)cmdp->u.raw64.sg_ranz * sizeof(gdth_sg64_str);
        } else {
            TRACE(("raw cmd: addr. %x sganz %x sgptr0 %x sglen0 %x\n",
                   cmdp->u.raw.sdata,cmdp->u.raw.sg_ranz,
                   cmdp->u.raw.sg_lst[0].sg_ptr,
                   cmdp->u.raw.sg_lst[0].sg_len));
            /* evaluate command size */
            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.raw.sg_lst) +
                (u16)cmdp->u.raw.sg_ranz * sizeof(gdth_sg_str);
        }
    }
    /* check space */
    if (ha->cmd_len & 3)
        ha->cmd_len += (4 - (ha->cmd_len & 3));

    if (ha->cmd_cnt > 0) {
        if ((ha->cmd_offs_dpmem + ha->cmd_len + DPMEM_COMMAND_OFFSET) >
            ha->ic_all_size) {
            TRACE2(("gdth_fill_raw() DPMEM overflow\n"));
            ha->cmd_tab[cmd_index-2].cmnd = UNUSED_CMND;
            return 0;
        }
    }

    /* copy command */
    gdth_copy_command(ha);
    return cmd_index;
}

static int gdth_special_cmd(gdth_ha_str *ha, struct scsi_cmnd *scp)
{
    register gdth_cmd_str *cmdp;
    struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
    int cmd_index;

    cmdp= ha->pccb;
    TRACE2(("gdth_special_cmd(): "));

    *cmdp = *cmndinfo->internal_cmd_str;
    cmdp->RequestBuffer = scp;

    /* search free command index */
    if (!(cmd_index=gdth_get_cmd_index(ha))) {
        TRACE(("GDT: No free command index found\n"));
        return 0;
    }

    /* if it's the first command, set command semaphore */
    if (ha->cmd_cnt == 0)
       gdth_set_sema0(ha);

    /* evaluate command size, check space */
    if (cmdp->OpCode == GDT_IOCTL) {
        TRACE2(("IOCTL\n"));
        ha->cmd_len = 
            GDTOFFSOF(gdth_cmd_str,u.ioctl.p_param) + sizeof(u64);
    } else if (cmdp->Service == CACHESERVICE) {
        TRACE2(("cache command %d\n",cmdp->OpCode));
        if (ha->cache_feat & GDT_64BIT)
            ha->cmd_len = 
                GDTOFFSOF(gdth_cmd_str,u.cache64.sg_lst) + sizeof(gdth_sg64_str);
        else
            ha->cmd_len = 
                GDTOFFSOF(gdth_cmd_str,u.cache.sg_lst) + sizeof(gdth_sg_str);
    } else if (cmdp->Service == SCSIRAWSERVICE) {
        TRACE2(("raw command %d\n",cmdp->OpCode));
        if (ha->raw_feat & GDT_64BIT)
            ha->cmd_len = 
                GDTOFFSOF(gdth_cmd_str,u.raw64.sg_lst) + sizeof(gdth_sg64_str);
        else
            ha->cmd_len = 
                GDTOFFSOF(gdth_cmd_str,u.raw.sg_lst) + sizeof(gdth_sg_str);
    }

    if (ha->cmd_len & 3)
        ha->cmd_len += (4 - (ha->cmd_len & 3));

    if (ha->cmd_cnt > 0) {
        if ((ha->cmd_offs_dpmem + ha->cmd_len + DPMEM_COMMAND_OFFSET) >
            ha->ic_all_size) {
            TRACE2(("gdth_special_cmd() DPMEM overflow\n"));
            ha->cmd_tab[cmd_index-2].cmnd = UNUSED_CMND;
            return 0;
        }
    }

    /* copy command */
    gdth_copy_command(ha);
    return cmd_index;
}    


/* Controller event handling functions */
static gdth_evt_str *gdth_store_event(gdth_ha_str *ha, u16 source, 
                                      u16 idx, gdth_evt_data *evt)
{
    gdth_evt_str *e;

    /* no GDTH_LOCK_HA() ! */
    TRACE2(("gdth_store_event() source %d idx %d\n", source, idx));
    if (source == 0)                        /* no source -> no event */
        return NULL;

    if (ebuffer[elastidx].event_source == source &&
        ebuffer[elastidx].event_idx == idx &&
        ((evt->size != 0 && ebuffer[elastidx].event_data.size != 0 &&
            !memcmp((char *)&ebuffer[elastidx].event_data.eu,
            (char *)&evt->eu, evt->size)) ||
        (evt->size == 0 && ebuffer[elastidx].event_data.size == 0 &&
            !strcmp((char *)&ebuffer[elastidx].event_data.event_string,
            (char *)&evt->event_string)))) { 
        e = &ebuffer[elastidx];
	e->last_stamp = (u32)ktime_get_real_seconds();
        ++e->same_count;
    } else {
        if (ebuffer[elastidx].event_source != 0) {  /* entry not free ? */
            ++elastidx;
            if (elastidx == MAX_EVENTS)
                elastidx = 0;
            if (elastidx == eoldidx) {              /* reached mark ? */
                ++eoldidx;
                if (eoldidx == MAX_EVENTS)
                    eoldidx = 0;
            }
        }
        e = &ebuffer[elastidx];
        e->event_source = source;
        e->event_idx = idx;
	e->first_stamp = e->last_stamp = (u32)ktime_get_real_seconds();
        e->same_count = 1;
        e->event_data = *evt;
        e->application = 0;
    }
    return e;
}

static int gdth_read_event(gdth_ha_str *ha, int handle, gdth_evt_str *estr)
{
    gdth_evt_str *e;
    int eindex;
    unsigned long flags;

    TRACE2(("gdth_read_event() handle %d\n", handle));
    spin_lock_irqsave(&ha->smp_lock, flags);
    if (handle == -1)
        eindex = eoldidx;
    else
        eindex = handle;
    estr->event_source = 0;

    if (eindex < 0 || eindex >= MAX_EVENTS) {
        spin_unlock_irqrestore(&ha->smp_lock, flags);
        return eindex;
    }
    e = &ebuffer[eindex];
    if (e->event_source != 0) {
        if (eindex != elastidx) {
            if (++eindex == MAX_EVENTS)
                eindex = 0;
        } else {
            eindex = -1;
        }
        memcpy(estr, e, sizeof(gdth_evt_str));
    }
    spin_unlock_irqrestore(&ha->smp_lock, flags);
    return eindex;
}

static void gdth_readapp_event(gdth_ha_str *ha,
                               u8 application, gdth_evt_str *estr)
{
    gdth_evt_str *e;
    int eindex;
    unsigned long flags;
    u8 found = FALSE;

    TRACE2(("gdth_readapp_event() app. %d\n", application));
    spin_lock_irqsave(&ha->smp_lock, flags);
    eindex = eoldidx;
    for (;;) {
        e = &ebuffer[eindex];
        if (e->event_source == 0)
            break;
        if ((e->application & application) == 0) {
            e->application |= application;
            found = TRUE;
            break;
        }
        if (eindex == elastidx)
            break;
        if (++eindex == MAX_EVENTS)
            eindex = 0;
    }
    if (found)
        memcpy(estr, e, sizeof(gdth_evt_str));
    else
        estr->event_source = 0;
    spin_unlock_irqrestore(&ha->smp_lock, flags);
}

static void gdth_clear_events(void)
{
    TRACE(("gdth_clear_events()"));

    eoldidx = elastidx = 0;
    ebuffer[0].event_source = 0;
}


/* SCSI interface functions */

static irqreturn_t __gdth_interrupt(gdth_ha_str *ha,
                                    int gdth_from_wait, int* pIndex)
{
    gdt6m_dpram_str __iomem *dp6m_ptr = NULL;
    gdt6_dpram_str __iomem *dp6_ptr;
    struct scsi_cmnd *scp;
    int rval, i;
    u8 IStatus;
    u16 Service;
    unsigned long flags = 0;

    TRACE(("gdth_interrupt() IRQ %d\n", ha->irq));

    /* if polling and not from gdth_wait() -> return */
    if (gdth_polling) {
        if (!gdth_from_wait) {
            return IRQ_HANDLED;
        }
    }

    if (!gdth_polling)
        spin_lock_irqsave(&ha->smp_lock, flags);

    /* search controller */
    IStatus = gdth_get_status(ha);
    if (IStatus == 0) {
        /* spurious interrupt */
        if (!gdth_polling)
            spin_unlock_irqrestore(&ha->smp_lock, flags);
        return IRQ_HANDLED;
    }

#ifdef GDTH_STATISTICS
    ++act_ints;
#endif

        if (ha->type == GDT_PCI) {
            dp6_ptr = ha->brd;
            if (IStatus & 0x80) {                       /* error flag */
                IStatus &= ~0x80;
                ha->status = readw(&dp6_ptr->u.ic.Status);
                TRACE2(("gdth_interrupt() error %d/%d\n",IStatus,ha->status));
            } else                                      /* no error */
                ha->status = S_OK;
            ha->info = readl(&dp6_ptr->u.ic.Info[0]);
            ha->service = readw(&dp6_ptr->u.ic.Service);
            ha->info2 = readl(&dp6_ptr->u.ic.Info[1]);

            writeb(0xff, &dp6_ptr->io.irqdel); /* acknowledge interrupt */
            writeb(0, &dp6_ptr->u.ic.Cmd_Index);/* reset command index */
            writeb(0, &dp6_ptr->io.Sema1);     /* reset status semaphore */
        } else if (ha->type == GDT_PCINEW) {
            if (IStatus & 0x80) {                       /* error flag */
                IStatus &= ~0x80;
                ha->status = inw(PTR2USHORT(&ha->plx->status));
                TRACE2(("gdth_interrupt() error %d/%d\n",IStatus,ha->status));
            } else
                ha->status = S_OK;
            ha->info = inl(PTR2USHORT(&ha->plx->info[0]));
            ha->service = inw(PTR2USHORT(&ha->plx->service));
            ha->info2 = inl(PTR2USHORT(&ha->plx->info[1]));

            outb(0xff, PTR2USHORT(&ha->plx->edoor_reg)); 
            outb(0x00, PTR2USHORT(&ha->plx->sema1_reg)); 
        } else if (ha->type == GDT_PCIMPR) {
            dp6m_ptr = ha->brd;
            if (IStatus & 0x80) {                       /* error flag */
                IStatus &= ~0x80;
                ha->status = readw(&dp6m_ptr->i960r.status);
                TRACE2(("gdth_interrupt() error %d/%d\n",IStatus,ha->status));
            } else                                      /* no error */
                ha->status = S_OK;

            ha->info = readl(&dp6m_ptr->i960r.info[0]);
            ha->service = readw(&dp6m_ptr->i960r.service);
            ha->info2 = readl(&dp6m_ptr->i960r.info[1]);

            /* event string */
            if (IStatus == ASYNCINDEX) {
                if (ha->service != SCREENSERVICE &&
                    (ha->fw_vers & 0xff) >= 0x1a) {
                    ha->dvr.severity = readb
                        (&((gdt6m_dpram_str __iomem *)ha->brd)->i960r.severity);
                    for (i = 0; i < 256; ++i) {
                        ha->dvr.event_string[i] = readb
                            (&((gdt6m_dpram_str __iomem *)ha->brd)->i960r.evt_str[i]);
                        if (ha->dvr.event_string[i] == 0)
                            break;
                    }
                }
            }
            writeb(0xff, &dp6m_ptr->i960r.edoor_reg);
            writeb(0, &dp6m_ptr->i960r.sema1_reg);
        } else {
            TRACE2(("gdth_interrupt() unknown controller type\n"));
            if (!gdth_polling)
                spin_unlock_irqrestore(&ha->smp_lock, flags);
            return IRQ_HANDLED;
        }

        TRACE(("gdth_interrupt() index %d stat %d info %d\n",
               IStatus,ha->status,ha->info));

        if (gdth_from_wait) {
            *pIndex = (int)IStatus;
        }

        if (IStatus == ASYNCINDEX) {
            TRACE2(("gdth_interrupt() async. event\n"));
            gdth_async_event(ha);
            if (!gdth_polling)
                spin_unlock_irqrestore(&ha->smp_lock, flags);
            gdth_next(ha);
            return IRQ_HANDLED;
        } 

        if (IStatus == SPEZINDEX) {
            TRACE2(("Service unknown or not initialized !\n"));
            ha->dvr.size = sizeof(ha->dvr.eu.driver);
            ha->dvr.eu.driver.ionode = ha->hanum;
            gdth_store_event(ha, ES_DRIVER, 4, &ha->dvr);
            if (!gdth_polling)
                spin_unlock_irqrestore(&ha->smp_lock, flags);
            return IRQ_HANDLED;
        }
        scp     = ha->cmd_tab[IStatus-2].cmnd;
        Service = ha->cmd_tab[IStatus-2].service;
        ha->cmd_tab[IStatus-2].cmnd = UNUSED_CMND;
        if (scp == UNUSED_CMND) {
            TRACE2(("gdth_interrupt() index to unused command (%d)\n",IStatus));
            ha->dvr.size = sizeof(ha->dvr.eu.driver);
            ha->dvr.eu.driver.ionode = ha->hanum;
            ha->dvr.eu.driver.index = IStatus;
            gdth_store_event(ha, ES_DRIVER, 1, &ha->dvr);
            if (!gdth_polling)
                spin_unlock_irqrestore(&ha->smp_lock, flags);
            return IRQ_HANDLED;
        }
        if (scp == INTERNAL_CMND) {
            TRACE(("gdth_interrupt() answer to internal command\n"));
            if (!gdth_polling)
                spin_unlock_irqrestore(&ha->smp_lock, flags);
            return IRQ_HANDLED;
        }

        TRACE(("gdth_interrupt() sync. status\n"));
        rval = gdth_sync_event(ha,Service,IStatus,scp);
        if (!gdth_polling)
            spin_unlock_irqrestore(&ha->smp_lock, flags);
        if (rval == 2) {
            gdth_putq(ha, scp, gdth_cmnd_priv(scp)->priority);
        } else if (rval == 1) {
            gdth_scsi_done(scp);
        }

    gdth_next(ha);
    return IRQ_HANDLED;
}

static irqreturn_t gdth_interrupt(int irq, void *dev_id)
{
	gdth_ha_str *ha = dev_id;

	return __gdth_interrupt(ha, false, NULL);
}

static int gdth_sync_event(gdth_ha_str *ha, int service, u8 index,
                                                              struct scsi_cmnd *scp)
{
    gdth_msg_str *msg;
    gdth_cmd_str *cmdp;
    u8 b, t;
    struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);

    cmdp = ha->pccb;
    TRACE(("gdth_sync_event() serv %d status %d\n",
           service,ha->status));

    if (service == SCREENSERVICE) {
        msg  = ha->pmsg;
        TRACE(("len: %d, answer: %d, ext: %d, alen: %d\n",
               msg->msg_len,msg->msg_answer,msg->msg_ext,msg->msg_alen));
        if (msg->msg_len > MSGLEN+1)
            msg->msg_len = MSGLEN+1;
        if (msg->msg_len)
            if (!(msg->msg_answer && msg->msg_ext)) {
                msg->msg_text[msg->msg_len] = '\0';
                printk("%s",msg->msg_text);
            }

        if (msg->msg_ext && !msg->msg_answer) {
            while (gdth_test_busy(ha))
                gdth_delay(0);
            cmdp->Service       = SCREENSERVICE;
            cmdp->RequestBuffer = SCREEN_CMND;
            gdth_get_cmd_index(ha);
            gdth_set_sema0(ha);
            cmdp->OpCode        = GDT_READ;
            cmdp->BoardNode     = LOCALBOARD;
            cmdp->u.screen.reserved  = 0;
            cmdp->u.screen.su.msg.msg_handle= msg->msg_handle;
            cmdp->u.screen.su.msg.msg_addr  = ha->msg_phys;
            ha->cmd_offs_dpmem = 0;
            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.screen.su.msg.msg_addr) 
                + sizeof(u64);
            ha->cmd_cnt = 0;
            gdth_copy_command(ha);
            gdth_release_event(ha);
            return 0;
        }

        if (msg->msg_answer && msg->msg_alen) {
            /* default answers (getchar() not possible) */
            if (msg->msg_alen == 1) {
                msg->msg_alen = 0;
                msg->msg_len = 1;
                msg->msg_text[0] = 0;
            } else {
                msg->msg_alen -= 2;
                msg->msg_len = 2;
                msg->msg_text[0] = 1;
                msg->msg_text[1] = 0;
            }
            msg->msg_ext    = 0;
            msg->msg_answer = 0;
            while (gdth_test_busy(ha))
                gdth_delay(0);
            cmdp->Service       = SCREENSERVICE;
            cmdp->RequestBuffer = SCREEN_CMND;
            gdth_get_cmd_index(ha);
            gdth_set_sema0(ha);
            cmdp->OpCode        = GDT_WRITE;
            cmdp->BoardNode     = LOCALBOARD;
            cmdp->u.screen.reserved  = 0;
            cmdp->u.screen.su.msg.msg_handle= msg->msg_handle;
            cmdp->u.screen.su.msg.msg_addr  = ha->msg_phys;
            ha->cmd_offs_dpmem = 0;
            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.screen.su.msg.msg_addr) 
                + sizeof(u64);
            ha->cmd_cnt = 0;
            gdth_copy_command(ha);
            gdth_release_event(ha);
            return 0;
        }
        printk("\n");

    } else {
        b = scp->device->channel;
        t = scp->device->id;
        if (cmndinfo->OpCode == -1 && b != ha->virt_bus) {
            ha->raw[BUS_L2P(ha,b)].io_cnt[t]--;
        }
        /* cache or raw service */
        if (ha->status == S_BSY) {
            TRACE2(("Controller busy -> retry !\n"));
            if (cmndinfo->OpCode == GDT_MOUNT)
                cmndinfo->OpCode = GDT_CLUST_INFO;
            /* retry */
            return 2;
        }
        if (scsi_bufflen(scp))
            dma_unmap_sg(&ha->pdev->dev, scsi_sglist(scp), scsi_sg_count(scp),
                         cmndinfo->dma_dir);

        if (cmndinfo->sense_paddr)
            dma_unmap_page(&ha->pdev->dev, cmndinfo->sense_paddr, 16,
			   DMA_FROM_DEVICE);

        if (ha->status == S_OK) {
            cmndinfo->status = S_OK;
            cmndinfo->info = ha->info;
            if (cmndinfo->OpCode != -1) {
                TRACE2(("gdth_sync_event(): special cmd 0x%x OK\n",
                        cmndinfo->OpCode));
                /* special commands GDT_CLUST_INFO/GDT_MOUNT ? */
                if (cmndinfo->OpCode == GDT_CLUST_INFO) {
                    ha->hdr[t].cluster_type = (u8)ha->info;
                    if (!(ha->hdr[t].cluster_type & 
                        CLUSTER_MOUNTED)) {
                        /* NOT MOUNTED -> MOUNT */
                        cmndinfo->OpCode = GDT_MOUNT;
                        if (ha->hdr[t].cluster_type & 
                            CLUSTER_RESERVED) {
                            /* cluster drive RESERVED (on the other node) */
                            cmndinfo->phase = -2;      /* reservation conflict */
                        }
                    } else {
                        cmndinfo->OpCode = -1;
                    }
                } else {
                    if (cmndinfo->OpCode == GDT_MOUNT) {
                        ha->hdr[t].cluster_type |= CLUSTER_MOUNTED;
                        ha->hdr[t].media_changed = TRUE;
                    } else if (cmndinfo->OpCode == GDT_UNMOUNT) {
                        ha->hdr[t].cluster_type &= ~CLUSTER_MOUNTED;
                        ha->hdr[t].media_changed = TRUE;
                    } 
                    cmndinfo->OpCode = -1;
                }
                /* retry */
                cmndinfo->priority = HIGH_PRI;
                return 2;
            } else {
                /* RESERVE/RELEASE ? */
                if (scp->cmnd[0] == RESERVE) {
                    ha->hdr[t].cluster_type |= CLUSTER_RESERVED;
                } else if (scp->cmnd[0] == RELEASE) {
                    ha->hdr[t].cluster_type &= ~CLUSTER_RESERVED;
                }           
                scp->result = DID_OK << 16;
                scp->sense_buffer[0] = 0;
            }
        } else {
            cmndinfo->status = ha->status;
            cmndinfo->info = ha->info;

            if (cmndinfo->OpCode != -1) {
                TRACE2(("gdth_sync_event(): special cmd 0x%x error 0x%x\n",
                        cmndinfo->OpCode, ha->status));
                if (cmndinfo->OpCode == GDT_SCAN_START ||
                    cmndinfo->OpCode == GDT_SCAN_END) {
                    cmndinfo->OpCode = -1;
                    /* retry */
                    cmndinfo->priority = HIGH_PRI;
                    return 2;
                }
                memset((char*)scp->sense_buffer,0,16);
                scp->sense_buffer[0] = 0x70;
                scp->sense_buffer[2] = NOT_READY;
                scp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
            } else if (service == CACHESERVICE) {
                if (ha->status == S_CACHE_UNKNOWN &&
                    (ha->hdr[t].cluster_type & 
                     CLUSTER_RESERVE_STATE) == CLUSTER_RESERVE_STATE) {
                    /* bus reset -> force GDT_CLUST_INFO */
                    ha->hdr[t].cluster_type &= ~CLUSTER_RESERVED;
                }
                memset((char*)scp->sense_buffer,0,16);
                if (ha->status == (u16)S_CACHE_RESERV) {
                    scp->result = (DID_OK << 16) | (RESERVATION_CONFLICT << 1);
                } else {
                    scp->sense_buffer[0] = 0x70;
                    scp->sense_buffer[2] = NOT_READY;
                    scp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
                }
                if (!cmndinfo->internal_command) {
                    ha->dvr.size = sizeof(ha->dvr.eu.sync);
                    ha->dvr.eu.sync.ionode  = ha->hanum;
                    ha->dvr.eu.sync.service = service;
                    ha->dvr.eu.sync.status  = ha->status;
                    ha->dvr.eu.sync.info    = ha->info;
                    ha->dvr.eu.sync.hostdrive = t;
                    if (ha->status >= 0x8000)
                        gdth_store_event(ha, ES_SYNC, 0, &ha->dvr);
                    else
                        gdth_store_event(ha, ES_SYNC, service, &ha->dvr);
                }
            } else {
                /* sense buffer filled from controller firmware (DMA) */
                if (ha->status != S_RAW_SCSI || ha->info >= 0x100) {
                    scp->result = DID_BAD_TARGET << 16;
                } else {
                    scp->result = (DID_OK << 16) | ha->info;
                }
            }
        }
        if (!cmndinfo->wait_for_completion)
            cmndinfo->wait_for_completion++;
        else 
            return 1;
    }

    return 0;
}

static char *async_cache_tab[] = {
/* 0*/  "\011\000\002\002\002\004\002\006\004"
        "GDT HA %u, service %u, async. status %u/%lu unknown",
/* 1*/  "\011\000\002\002\002\004\002\006\004"
        "GDT HA %u, service %u, async. status %u/%lu unknown",
/* 2*/  "\005\000\002\006\004"
        "GDT HA %u, Host Drive %lu not ready",
/* 3*/  "\005\000\002\006\004"
        "GDT HA %u, Host Drive %lu: REASSIGN not successful and/or data error on reassigned blocks. Drive may crash in the future and should be replaced",
/* 4*/  "\005\000\002\006\004"
        "GDT HA %u, mirror update on Host Drive %lu failed",
/* 5*/  "\005\000\002\006\004"
        "GDT HA %u, Mirror Drive %lu failed",
/* 6*/  "\005\000\002\006\004"
        "GDT HA %u, Mirror Drive %lu: REASSIGN not successful and/or data error on reassigned blocks. Drive may crash in the future and should be replaced",
/* 7*/  "\005\000\002\006\004"
        "GDT HA %u, Host Drive %lu write protected",
/* 8*/  "\005\000\002\006\004"
        "GDT HA %u, media changed in Host Drive %lu",
/* 9*/  "\005\000\002\006\004"
        "GDT HA %u, Host Drive %lu is offline",
/*10*/  "\005\000\002\006\004"
        "GDT HA %u, media change of Mirror Drive %lu",
/*11*/  "\005\000\002\006\004"
        "GDT HA %u, Mirror Drive %lu is write protected",
/*12*/  "\005\000\002\006\004"
        "GDT HA %u, general error on Host Drive %lu. Please check the devices of this drive!",
/*13*/  "\007\000\002\006\002\010\002"
        "GDT HA %u, Array Drive %u: Cache Drive %u failed",
/*14*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: FAIL state entered",
/*15*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: error",
/*16*/  "\007\000\002\006\002\010\002"
        "GDT HA %u, Array Drive %u: failed drive replaced by Cache Drive %u",
/*17*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: parity build failed",
/*18*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: drive rebuild failed",
/*19*/  "\005\000\002\010\002"
        "GDT HA %u, Test of Hot Fix %u failed",
/*20*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: drive build finished successfully",
/*21*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: drive rebuild finished successfully",
/*22*/  "\007\000\002\006\002\010\002"
        "GDT HA %u, Array Drive %u: Hot Fix %u activated",
/*23*/  "\005\000\002\006\002"
        "GDT HA %u, Host Drive %u: processing of i/o aborted due to serious drive error",
/*24*/  "\005\000\002\010\002"
        "GDT HA %u, mirror update on Cache Drive %u completed",
/*25*/  "\005\000\002\010\002"
        "GDT HA %u, mirror update on Cache Drive %lu failed",
/*26*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: drive rebuild started",
/*27*/  "\005\000\002\012\001"
        "GDT HA %u, Fault bus %u: SHELF OK detected",
/*28*/  "\005\000\002\012\001"
        "GDT HA %u, Fault bus %u: SHELF not OK detected",
/*29*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: Auto Hot Plug started",
/*30*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: new disk detected",
/*31*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: old disk detected",
/*32*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: plugging an active disk is invalid",
/*33*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: invalid device detected",
/*34*/  "\011\000\002\012\001\013\001\006\004"
        "GDT HA %u, Fault bus %u, ID %u: insufficient disk capacity (%lu MB required)",
/*35*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: disk write protected",
/*36*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: disk not available",
/*37*/  "\007\000\002\012\001\006\004"
        "GDT HA %u, Fault bus %u: swap detected (%lu)",
/*38*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: Auto Hot Plug finished successfully",
/*39*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: Auto Hot Plug aborted due to user Hot Plug",
/*40*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: Auto Hot Plug aborted",
/*41*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, Fault bus %u, ID %u: Auto Hot Plug for Hot Fix started",
/*42*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: drive build started",
/*43*/  "\003\000\002"
        "GDT HA %u, DRAM parity error detected",
/*44*/  "\005\000\002\006\002"
        "GDT HA %u, Mirror Drive %u: update started",
/*45*/  "\007\000\002\006\002\010\002"
        "GDT HA %u, Mirror Drive %u: Hot Fix %u activated",
/*46*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: no matching Pool Hot Fix Drive available",
/*47*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: Pool Hot Fix Drive available",
/*48*/  "\005\000\002\006\002"
        "GDT HA %u, Mirror Drive %u: no matching Pool Hot Fix Drive available",
/*49*/  "\005\000\002\006\002"
        "GDT HA %u, Mirror Drive %u: Pool Hot Fix Drive available",
/*50*/  "\007\000\002\012\001\013\001"
        "GDT HA %u, SCSI bus %u, ID %u: IGNORE_WIDE_RESIDUE message received",
/*51*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: expand started",
/*52*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: expand finished successfully",
/*53*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: expand failed",
/*54*/  "\003\000\002"
        "GDT HA %u, CPU temperature critical",
/*55*/  "\003\000\002"
        "GDT HA %u, CPU temperature OK",
/*56*/  "\005\000\002\006\004"
        "GDT HA %u, Host drive %lu created",
/*57*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: expand restarted",
/*58*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: expand stopped",
/*59*/  "\005\000\002\010\002"
        "GDT HA %u, Mirror Drive %u: drive build quited",
/*60*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: parity build quited",
/*61*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: drive rebuild quited",
/*62*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: parity verify started",
/*63*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: parity verify done",
/*64*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: parity verify failed",
/*65*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: parity error detected",
/*66*/  "\005\000\002\006\002"
        "GDT HA %u, Array Drive %u: parity verify quited",
/*67*/  "\005\000\002\006\002"
        "GDT HA %u, Host Drive %u reserved",
/*68*/  "\005\000\002\006\002"
        "GDT HA %u, Host Drive %u mounted and released",
/*69*/  "\005\000\002\006\002"
        "GDT HA %u, Host Drive %u released",
/*70*/  "\003\000\002"
        "GDT HA %u, DRAM error detected and corrected with ECC",
/*71*/  "\003\000\002"
        "GDT HA %u, Uncorrectable DRAM error detected with ECC",
/*72*/  "\011\000\002\012\001\013\001\014\001"
        "GDT HA %u, SCSI bus %u, ID %u, LUN %u: reassigning block",
/*73*/  "\005\000\002\006\002"
        "GDT HA %u, Host drive %u resetted locally",
/*74*/  "\005\000\002\006\002"
        "GDT HA %u, Host drive %u resetted remotely",
/*75*/  "\003\000\002"
        "GDT HA %u, async. status 75 unknown",
};


static int gdth_async_event(gdth_ha_str *ha)
{
    gdth_cmd_str *cmdp;
    int cmd_index;

    cmdp= ha->pccb;
    TRACE2(("gdth_async_event() ha %d serv %d\n",
            ha->hanum, ha->service));

    if (ha->service == SCREENSERVICE) {
        if (ha->status == MSG_REQUEST) {
            while (gdth_test_busy(ha))
                gdth_delay(0);
            cmdp->Service       = SCREENSERVICE;
            cmdp->RequestBuffer = SCREEN_CMND;
            cmd_index = gdth_get_cmd_index(ha);
            gdth_set_sema0(ha);
            cmdp->OpCode        = GDT_READ;
            cmdp->BoardNode     = LOCALBOARD;
            cmdp->u.screen.reserved  = 0;
            cmdp->u.screen.su.msg.msg_handle= MSG_INV_HANDLE;
            cmdp->u.screen.su.msg.msg_addr  = ha->msg_phys;
            ha->cmd_offs_dpmem = 0;
            ha->cmd_len = GDTOFFSOF(gdth_cmd_str,u.screen.su.msg.msg_addr) 
                + sizeof(u64);
            ha->cmd_cnt = 0;
            gdth_copy_command(ha);
            printk("[PCI %d/%d] ",(u16)(ha->brd_phys>>8),
                       (u16)((ha->brd_phys>>3)&0x1f));
            gdth_release_event(ha);
        }

    } else {
        if (ha->type == GDT_PCIMPR && 
            (ha->fw_vers & 0xff) >= 0x1a) {
            ha->dvr.size = 0;
            ha->dvr.eu.async.ionode = ha->hanum;
            ha->dvr.eu.async.status  = ha->status;
            /* severity and event_string already set! */
        } else {        
            ha->dvr.size = sizeof(ha->dvr.eu.async);
            ha->dvr.eu.async.ionode   = ha->hanum;
            ha->dvr.eu.async.service = ha->service;
            ha->dvr.eu.async.status  = ha->status;
            ha->dvr.eu.async.info    = ha->info;
            *(u32 *)ha->dvr.eu.async.scsi_coord  = ha->info2;
        }
        gdth_store_event( ha, ES_ASYNC, ha->service, &ha->dvr );
        gdth_log_event( &ha->dvr, NULL );
    
        /* new host drive from expand? */
        if (ha->service == CACHESERVICE && ha->status == 56) {
            TRACE2(("gdth_async_event(): new host drive %d created\n",
                    (u16)ha->info));
            /* gdth_analyse_hdrive(hanum, (u16)ha->info); */
        }   
    }
    return 1;
}

static void gdth_log_event(gdth_evt_data *dvr, char *buffer)
{
    gdth_stackframe stack;
    char *f = NULL;
    int i,j;

    TRACE2(("gdth_log_event()\n"));
    if (dvr->size == 0) {
        if (buffer == NULL) {
            printk("Adapter %d: %s\n",dvr->eu.async.ionode,dvr->event_string); 
        } else {
            sprintf(buffer,"Adapter %d: %s\n",
                dvr->eu.async.ionode,dvr->event_string); 
        }
    } else if (dvr->eu.async.service == CACHESERVICE && 
        INDEX_OK(dvr->eu.async.status, async_cache_tab)) {
        TRACE2(("GDT: Async. event cache service, event no.: %d\n",
                dvr->eu.async.status));
        
        f = async_cache_tab[dvr->eu.async.status];
        
        /* i: parameter to push, j: stack element to fill */
        for (j=0,i=1; i < f[0]; i+=2) {
            switch (f[i+1]) {
              case 4:
                stack.b[j++] = *(u32*)&dvr->eu.stream[(int)f[i]];
                break;
              case 2:
                stack.b[j++] = *(u16*)&dvr->eu.stream[(int)f[i]];
                break;
              case 1:
                stack.b[j++] = *(u8*)&dvr->eu.stream[(int)f[i]];
                break;
              default:
                break;
            }
        }
        
        if (buffer == NULL) {
            printk(&f[(int)f[0]],stack); 
            printk("\n");
        } else {
            sprintf(buffer,&f[(int)f[0]],stack); 
        }

    } else {
        if (buffer == NULL) {
            printk("GDT HA %u, Unknown async. event service %d event no. %d\n",
                   dvr->eu.async.ionode,dvr->eu.async.service,dvr->eu.async.status);
        } else {
            sprintf(buffer,"GDT HA %u, Unknown async. event service %d event no. %d",
                    dvr->eu.async.ionode,dvr->eu.async.service,dvr->eu.async.status);
        }
    }
}

#ifdef GDTH_STATISTICS
static u8	gdth_timer_running;

static void gdth_timeout(struct timer_list *unused)
{
    u32 i;
    struct scsi_cmnd *nscp;
    gdth_ha_str *ha;
    unsigned long flags;

    if(unlikely(list_empty(&gdth_instances))) {
	    gdth_timer_running = 0;
	    return;
    }

    ha = list_first_entry(&gdth_instances, gdth_ha_str, list);
    spin_lock_irqsave(&ha->smp_lock, flags);

    for (act_stats=0,i=0; i<GDTH_MAXCMDS; ++i) 
        if (ha->cmd_tab[i].cmnd != UNUSED_CMND)
            ++act_stats;

    for (act_rq=0,
         nscp=ha->req_first; nscp; nscp=(struct scsi_cmnd*)nscp->SCp.ptr)
        ++act_rq;

    TRACE2(("gdth_to(): ints %d, ios %d, act_stats %d, act_rq %d\n",
            act_ints, act_ios, act_stats, act_rq));
    act_ints = act_ios = 0;

    gdth_timer.expires = jiffies + 30 * HZ;
    add_timer(&gdth_timer);
    spin_unlock_irqrestore(&ha->smp_lock, flags);
}

static void gdth_timer_init(void)
{
	if (gdth_timer_running)
		return;
	gdth_timer_running = 1;
	TRACE2(("gdth_detect(): Initializing timer !\n"));
	gdth_timer.expires = jiffies + HZ;
	add_timer(&gdth_timer);
}
#else
static inline void gdth_timer_init(void)
{
}
#endif

static void __init internal_setup(char *str,int *ints)
{
    int i;
    char *cur_str, *argv;

    TRACE2(("internal_setup() str %s ints[0] %d\n", 
            str ? str:"NULL", ints ? ints[0]:0));

    /* analyse string */
    argv = str;
    while (argv && (cur_str = strchr(argv, ':'))) {
        int val = 0, c = *++cur_str;
        
        if (c == 'n' || c == 'N')
            val = 0;
        else if (c == 'y' || c == 'Y')
            val = 1;
        else
            val = (int)simple_strtoul(cur_str, NULL, 0);

        if (!strncmp(argv, "disable:", 8))
            disable = val;
        else if (!strncmp(argv, "reserve_mode:", 13))
            reserve_mode = val;
        else if (!strncmp(argv, "reverse_scan:", 13))
            reverse_scan = val;
        else if (!strncmp(argv, "hdr_channel:", 12))
            hdr_channel = val;
        else if (!strncmp(argv, "max_ids:", 8))
            max_ids = val;
        else if (!strncmp(argv, "rescan:", 7))
            rescan = val;
        else if (!strncmp(argv, "shared_access:", 14))
            shared_access = val;
        else if (!strncmp(argv, "reserve_list:", 13)) {
            reserve_list[0] = val;
            for (i = 1; i < MAX_RES_ARGS; i++) {
                cur_str = strchr(cur_str, ',');
                if (!cur_str)
                    break;
                if (!isdigit((int)*++cur_str)) {
                    --cur_str;          
                    break;
                }
                reserve_list[i] = 
                    (int)simple_strtoul(cur_str, NULL, 0);
            }
            if (!cur_str)
                break;
            argv = ++cur_str;
            continue;
        }

        if ((argv = strchr(argv, ',')))
            ++argv;
    }
}

int __init option_setup(char *str)
{
    int ints[MAXHA];
    char *cur = str;
    int i = 1;

    TRACE2(("option_setup() str %s\n", str ? str:"NULL")); 

    while (cur && isdigit(*cur) && i < MAXHA) {
        ints[i++] = simple_strtoul(cur, NULL, 0);
        if ((cur = strchr(cur, ',')) != NULL) cur++;
    }

    ints[0] = i - 1;
    internal_setup(cur, ints);
    return 1;
}

static const char *gdth_ctr_name(gdth_ha_str *ha)
{
    TRACE2(("gdth_ctr_name()\n"));

    if (ha->type == GDT_PCI) {
        switch (ha->pdev->device) {
          case PCI_DEVICE_ID_VORTEX_GDT60x0:
            return("GDT6000/6020/6050");
          case PCI_DEVICE_ID_VORTEX_GDT6000B:
            return("GDT6000B/6010");
        }
    } 
    /* new controllers (GDT_PCINEW, GDT_PCIMPR, ..) use board_info IOCTL! */

    return("");
}

static const char *gdth_info(struct Scsi_Host *shp)
{
    gdth_ha_str *ha = shost_priv(shp);

    TRACE2(("gdth_info()\n"));
    return ((const char *)ha->binfo.type_string);
}

static enum blk_eh_timer_return gdth_timed_out(struct scsi_cmnd *scp)
{
	gdth_ha_str *ha = shost_priv(scp->device->host);
	struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
	u8 b, t;
	unsigned long flags;
	enum blk_eh_timer_return retval = BLK_EH_DONE;

	TRACE(("%s() cmd 0x%x\n", scp->cmnd[0], __func__));
	b = scp->device->channel;
	t = scp->device->id;

	/*
	 * We don't really honor the command timeout, but we try to
	 * honor 6 times of the actual command timeout! So reset the
	 * timer if this is less than 6th timeout on this command!
	 */
	if (++cmndinfo->timeout_count < 6)
		retval = BLK_EH_RESET_TIMER;

	/* Reset the timeout if it is locked IO */
	spin_lock_irqsave(&ha->smp_lock, flags);
	if ((b != ha->virt_bus && ha->raw[BUS_L2P(ha, b)].lock) ||
	    (b == ha->virt_bus && t < MAX_HDRIVES && ha->hdr[t].lock)) {
		TRACE2(("%s(): locked IO, reset timeout\n", __func__));
		retval = BLK_EH_RESET_TIMER;
	}
	spin_unlock_irqrestore(&ha->smp_lock, flags);

	return retval;
}


static int gdth_eh_bus_reset(struct scsi_cmnd *scp)
{
    gdth_ha_str *ha = shost_priv(scp->device->host);
    int i;
    unsigned long flags;
    struct scsi_cmnd *cmnd;
    u8 b;

    TRACE2(("gdth_eh_bus_reset()\n"));

    b = scp->device->channel;

    /* clear command tab */
    spin_lock_irqsave(&ha->smp_lock, flags);
    for (i = 0; i < GDTH_MAXCMDS; ++i) {
        cmnd = ha->cmd_tab[i].cmnd;
        if (!SPECIAL_SCP(cmnd) && cmnd->device->channel == b)
            ha->cmd_tab[i].cmnd = UNUSED_CMND;
    }
    spin_unlock_irqrestore(&ha->smp_lock, flags);

    if (b == ha->virt_bus) {
        /* host drives */
        for (i = 0; i < MAX_HDRIVES; ++i) {
            if (ha->hdr[i].present) {
                spin_lock_irqsave(&ha->smp_lock, flags);
                gdth_polling = TRUE;
                while (gdth_test_busy(ha))
                    gdth_delay(0);
                if (gdth_internal_cmd(ha, CACHESERVICE,
                                      GDT_CLUST_RESET, i, 0, 0))
                    ha->hdr[i].cluster_type &= ~CLUSTER_RESERVED;
                gdth_polling = FALSE;
                spin_unlock_irqrestore(&ha->smp_lock, flags);
            }
        }
    } else {
        /* raw devices */
        spin_lock_irqsave(&ha->smp_lock, flags);
        for (i = 0; i < MAXID; ++i)
            ha->raw[BUS_L2P(ha,b)].io_cnt[i] = 0;
        gdth_polling = TRUE;
        while (gdth_test_busy(ha))
            gdth_delay(0);
        gdth_internal_cmd(ha, SCSIRAWSERVICE, GDT_RESET_BUS,
                          BUS_L2P(ha,b), 0, 0);
        gdth_polling = FALSE;
        spin_unlock_irqrestore(&ha->smp_lock, flags);
    }
    return SUCCESS;
}

static int gdth_bios_param(struct scsi_device *sdev,struct block_device *bdev,sector_t cap,int *ip)
{
    u8 b, t;
    gdth_ha_str *ha = shost_priv(sdev->host);
    struct scsi_device *sd;
    unsigned capacity;

    sd = sdev;
    capacity = cap;
    b = sd->channel;
    t = sd->id;
    TRACE2(("gdth_bios_param() ha %d bus %d target %d\n", ha->hanum, b, t));

    if (b != ha->virt_bus || ha->hdr[t].heads == 0) {
        /* raw device or host drive without mapping information */
        TRACE2(("Evaluate mapping\n"));
        gdth_eval_mapping(capacity,&ip[2],&ip[0],&ip[1]);
    } else {
        ip[0] = ha->hdr[t].heads;
        ip[1] = ha->hdr[t].secs;
        ip[2] = capacity / ip[0] / ip[1];
    }

    TRACE2(("gdth_bios_param(): %d heads, %d secs, %d cyls\n",
            ip[0],ip[1],ip[2]));
    return 0;
}


static int gdth_queuecommand_lck(struct scsi_cmnd *scp,
				void (*done)(struct scsi_cmnd *))
{
    gdth_ha_str *ha = shost_priv(scp->device->host);
    struct gdth_cmndinfo *cmndinfo;

    TRACE(("gdth_queuecommand() cmd 0x%x\n", scp->cmnd[0]));

    cmndinfo = gdth_get_cmndinfo(ha);
    BUG_ON(!cmndinfo);

    scp->scsi_done = done;
    cmndinfo->timeout_count = 0;
    cmndinfo->priority = DEFAULT_PRI;

    return __gdth_queuecommand(ha, scp, cmndinfo);
}

static DEF_SCSI_QCMD(gdth_queuecommand)

static int __gdth_queuecommand(gdth_ha_str *ha, struct scsi_cmnd *scp,
				struct gdth_cmndinfo *cmndinfo)
{
    scp->host_scribble = (unsigned char *)cmndinfo;
    cmndinfo->wait_for_completion = 1;
    cmndinfo->phase = -1;
    cmndinfo->OpCode = -1;

#ifdef GDTH_STATISTICS
    ++act_ios;
#endif

    gdth_putq(ha, scp, cmndinfo->priority);
    gdth_next(ha);
    return 0;
}


static int gdth_open(struct inode *inode, struct file *filep)
{
    gdth_ha_str *ha;

    mutex_lock(&gdth_mutex);
    list_for_each_entry(ha, &gdth_instances, list) {
        if (!ha->sdev)
            ha->sdev = scsi_get_host_dev(ha->shost);
    }
    mutex_unlock(&gdth_mutex);

    TRACE(("gdth_open()\n"));
    return 0;
}

static int gdth_close(struct inode *inode, struct file *filep)
{
    TRACE(("gdth_close()\n"));
    return 0;
}

static int ioc_event(void __user *arg)
{
    gdth_ioctl_event evt;
    gdth_ha_str *ha;
    unsigned long flags;

    if (copy_from_user(&evt, arg, sizeof(gdth_ioctl_event)))
        return -EFAULT;
    ha = gdth_find_ha(evt.ionode);
    if (!ha)
        return -EFAULT;

    if (evt.erase == 0xff) {
        if (evt.event.event_source == ES_TEST)
            evt.event.event_data.size=sizeof(evt.event.event_data.eu.test); 
        else if (evt.event.event_source == ES_DRIVER)
            evt.event.event_data.size=sizeof(evt.event.event_data.eu.driver); 
        else if (evt.event.event_source == ES_SYNC)
            evt.event.event_data.size=sizeof(evt.event.event_data.eu.sync); 
        else
            evt.event.event_data.size=sizeof(evt.event.event_data.eu.async);
        spin_lock_irqsave(&ha->smp_lock, flags);
        gdth_store_event(ha, evt.event.event_source, evt.event.event_idx,
                         &evt.event.event_data);
        spin_unlock_irqrestore(&ha->smp_lock, flags);
    } else if (evt.erase == 0xfe) {
        gdth_clear_events();
    } else if (evt.erase == 0) {
        evt.handle = gdth_read_event(ha, evt.handle, &evt.event);
    } else {
        gdth_readapp_event(ha, evt.erase, &evt.event);
    }     
    if (copy_to_user(arg, &evt, sizeof(gdth_ioctl_event)))
        return -EFAULT;
    return 0;
}

static int ioc_lockdrv(void __user *arg)
{
    gdth_ioctl_lockdrv ldrv;
    u8 i, j;
    unsigned long flags;
    gdth_ha_str *ha;

    if (copy_from_user(&ldrv, arg, sizeof(gdth_ioctl_lockdrv)))
        return -EFAULT;
    ha = gdth_find_ha(ldrv.ionode);
    if (!ha)
        return -EFAULT;

    for (i = 0; i < ldrv.drive_cnt && i < MAX_HDRIVES; ++i) {
        j = ldrv.drives[i];
        if (j >= MAX_HDRIVES || !ha->hdr[j].present)
            continue;
        if (ldrv.lock) {
            spin_lock_irqsave(&ha->smp_lock, flags);
            ha->hdr[j].lock = 1;
            spin_unlock_irqrestore(&ha->smp_lock, flags);
            gdth_wait_completion(ha, ha->bus_cnt, j);
        } else {
            spin_lock_irqsave(&ha->smp_lock, flags);
            ha->hdr[j].lock = 0;
            spin_unlock_irqrestore(&ha->smp_lock, flags);
            gdth_next(ha);
        }
    } 
    return 0;
}

static int ioc_resetdrv(void __user *arg, char *cmnd)
{
    gdth_ioctl_reset res;
    gdth_cmd_str cmd;
    gdth_ha_str *ha;
    int rval;

    if (copy_from_user(&res, arg, sizeof(gdth_ioctl_reset)) ||
        res.number >= MAX_HDRIVES)
        return -EFAULT;
    ha = gdth_find_ha(res.ionode);
    if (!ha)
        return -EFAULT;

    if (!ha->hdr[res.number].present)
        return 0;
    memset(&cmd, 0, sizeof(gdth_cmd_str));
    cmd.Service = CACHESERVICE;
    cmd.OpCode = GDT_CLUST_RESET;
    if (ha->cache_feat & GDT_64BIT)
        cmd.u.cache64.DeviceNo = res.number;
    else
        cmd.u.cache.DeviceNo = res.number;

    rval = __gdth_execute(ha->sdev, &cmd, cmnd, 30, NULL);
    if (rval < 0)
        return rval;
    res.status = rval;

    if (copy_to_user(arg, &res, sizeof(gdth_ioctl_reset)))
        return -EFAULT;
    return 0;
}

static void gdth_ioc_cacheservice(gdth_ha_str *ha, gdth_ioctl_general *gen,
		u64 paddr)
{
	if (ha->cache_feat & GDT_64BIT) {
		/* copy elements from 32-bit IOCTL structure */
		gen->command.u.cache64.BlockCnt = gen->command.u.cache.BlockCnt;
		gen->command.u.cache64.BlockNo = gen->command.u.cache.BlockNo;
		gen->command.u.cache64.DeviceNo = gen->command.u.cache.DeviceNo;

		if (ha->cache_feat & SCATTER_GATHER) {
			gen->command.u.cache64.DestAddr = (u64)-1;
			gen->command.u.cache64.sg_canz = 1;
			gen->command.u.cache64.sg_lst[0].sg_ptr = paddr;
			gen->command.u.cache64.sg_lst[0].sg_len = gen->data_len;
			gen->command.u.cache64.sg_lst[1].sg_len = 0;
		} else {
			gen->command.u.cache64.DestAddr = paddr;
			gen->command.u.cache64.sg_canz = 0;
		}
	} else {
		if (ha->cache_feat & SCATTER_GATHER) {
			gen->command.u.cache.DestAddr = 0xffffffff;
				gen->command.u.cache.sg_canz = 1;
			gen->command.u.cache.sg_lst[0].sg_ptr = (u32)paddr;
			gen->command.u.cache.sg_lst[0].sg_len = gen->data_len;
			gen->command.u.cache.sg_lst[1].sg_len = 0;
		} else {
			gen->command.u.cache.DestAddr = paddr;
			gen->command.u.cache.sg_canz = 0;
		}
	}
}

static void gdth_ioc_scsiraw(gdth_ha_str *ha, gdth_ioctl_general *gen,
		u64 paddr)
{
	if (ha->raw_feat & GDT_64BIT) {
		/* copy elements from 32-bit IOCTL structure */
		char cmd[16];

		gen->command.u.raw64.sense_len = gen->command.u.raw.sense_len;
		gen->command.u.raw64.bus = gen->command.u.raw.bus;
		gen->command.u.raw64.lun = gen->command.u.raw.lun;
		gen->command.u.raw64.target = gen->command.u.raw.target;
		memcpy(cmd, gen->command.u.raw.cmd, 16);
		memcpy(gen->command.u.raw64.cmd, cmd, 16);
		gen->command.u.raw64.clen = gen->command.u.raw.clen;
		gen->command.u.raw64.sdlen = gen->command.u.raw.sdlen;
		gen->command.u.raw64.direction = gen->command.u.raw.direction;

		/* addresses */
		if (ha->raw_feat & SCATTER_GATHER) {
			gen->command.u.raw64.sdata = (u64)-1;
			gen->command.u.raw64.sg_ranz = 1;
			gen->command.u.raw64.sg_lst[0].sg_ptr = paddr;
			gen->command.u.raw64.sg_lst[0].sg_len = gen->data_len;
			gen->command.u.raw64.sg_lst[1].sg_len = 0;
		} else {
			gen->command.u.raw64.sdata = paddr;
			gen->command.u.raw64.sg_ranz = 0;
                }

		gen->command.u.raw64.sense_data = paddr + gen->data_len;
	} else {
		if (ha->raw_feat & SCATTER_GATHER) {
			gen->command.u.raw.sdata = 0xffffffff;
			gen->command.u.raw.sg_ranz = 1;
			gen->command.u.raw.sg_lst[0].sg_ptr = (u32)paddr;
			gen->command.u.raw.sg_lst[0].sg_len = gen->data_len;
			gen->command.u.raw.sg_lst[1].sg_len = 0;
		} else {
			gen->command.u.raw.sdata = paddr;
			gen->command.u.raw.sg_ranz = 0;
                }

		gen->command.u.raw.sense_data = (u32)paddr + gen->data_len;
	}
}

static int ioc_general(void __user *arg, char *cmnd)
{
	gdth_ioctl_general gen;
	gdth_ha_str *ha;
	char *buf = NULL;
	dma_addr_t paddr;
	int rval;

	if (copy_from_user(&gen, arg, sizeof(gdth_ioctl_general)))
		return -EFAULT;
	ha = gdth_find_ha(gen.ionode);
	if (!ha)
		return -EFAULT;

	if (gen.data_len > INT_MAX)
		return -EINVAL;
	if (gen.sense_len > INT_MAX)
		return -EINVAL;
	if (gen.data_len + gen.sense_len > INT_MAX)
		return -EINVAL;

	if (gen.data_len + gen.sense_len > 0) {
		buf = dma_alloc_coherent(&ha->pdev->dev,
				gen.data_len + gen.sense_len, &paddr,
				GFP_KERNEL);
		if (!buf)
			return -EFAULT;

		rval = -EFAULT;
		if (copy_from_user(buf, arg + sizeof(gdth_ioctl_general),
				   gen.data_len + gen.sense_len))
			goto out_free_buf;

		if (gen.command.OpCode == GDT_IOCTL)
			gen.command.u.ioctl.p_param = paddr;
		else if (gen.command.Service == CACHESERVICE)
			gdth_ioc_cacheservice(ha, &gen, paddr);
		else if (gen.command.Service == SCSIRAWSERVICE)
			gdth_ioc_scsiraw(ha, &gen, paddr);
		else
			goto out_free_buf;
	}

	rval = __gdth_execute(ha->sdev, &gen.command, cmnd, gen.timeout,
			&gen.info);
	if (rval < 0)
		goto out_free_buf;
	gen.status = rval;

	rval = -EFAULT;
	if (copy_to_user(arg + sizeof(gdth_ioctl_general), buf,
			 gen.data_len + gen.sense_len))
		goto out_free_buf;
	if (copy_to_user(arg, &gen,
			sizeof(gdth_ioctl_general) - sizeof(gdth_cmd_str)))
		goto out_free_buf;

	rval = 0;
out_free_buf:
	if (buf)
		dma_free_coherent(&ha->pdev->dev, gen.data_len + gen.sense_len,
				  buf, paddr);
	return rval;
}
 
static int ioc_hdrlist(void __user *arg, char *cmnd)
{
    gdth_ioctl_rescan *rsc;
    gdth_cmd_str *cmd;
    gdth_ha_str *ha;
    u8 i;
    int rc = -ENOMEM;
    u32 cluster_type = 0;

    rsc = kmalloc(sizeof(*rsc), GFP_KERNEL);
    cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
    if (!rsc || !cmd)
        goto free_fail;

    if (copy_from_user(rsc, arg, sizeof(gdth_ioctl_rescan)) ||
        (NULL == (ha = gdth_find_ha(rsc->ionode)))) {
        rc = -EFAULT;
        goto free_fail;
    }
    memset(cmd, 0, sizeof(gdth_cmd_str));
   
    for (i = 0; i < MAX_HDRIVES; ++i) { 
        if (!ha->hdr[i].present) {
            rsc->hdr_list[i].bus = 0xff; 
            continue;
        } 
        rsc->hdr_list[i].bus = ha->virt_bus;
        rsc->hdr_list[i].target = i;
        rsc->hdr_list[i].lun = 0;
        rsc->hdr_list[i].cluster_type = ha->hdr[i].cluster_type;
        if (ha->hdr[i].cluster_type & CLUSTER_DRIVE) { 
            cmd->Service = CACHESERVICE;
            cmd->OpCode = GDT_CLUST_INFO;
            if (ha->cache_feat & GDT_64BIT)
                cmd->u.cache64.DeviceNo = i;
            else
                cmd->u.cache.DeviceNo = i;
            if (__gdth_execute(ha->sdev, cmd, cmnd, 30, &cluster_type) == S_OK)
                rsc->hdr_list[i].cluster_type = cluster_type;
        }
    } 

    if (copy_to_user(arg, rsc, sizeof(gdth_ioctl_rescan)))
        rc = -EFAULT;
    else
        rc = 0;

free_fail:
    kfree(rsc);
    kfree(cmd);
    return rc;
}

static int ioc_rescan(void __user *arg, char *cmnd)
{
    gdth_ioctl_rescan *rsc;
    gdth_cmd_str *cmd;
    u16 i, status, hdr_cnt;
    u32 info;
    int cyls, hds, secs;
    int rc = -ENOMEM;
    unsigned long flags;
    gdth_ha_str *ha; 

    rsc = kmalloc(sizeof(*rsc), GFP_KERNEL);
    cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd || !rsc)
        goto free_fail;

    if (copy_from_user(rsc, arg, sizeof(gdth_ioctl_rescan)) ||
        (NULL == (ha = gdth_find_ha(rsc->ionode)))) {
        rc = -EFAULT;
        goto free_fail;
    }
    memset(cmd, 0, sizeof(gdth_cmd_str));

    if (rsc->flag == 0) {
        /* old method: re-init. cache service */
        cmd->Service = CACHESERVICE;
        if (ha->cache_feat & GDT_64BIT) {
            cmd->OpCode = GDT_X_INIT_HOST;
            cmd->u.cache64.DeviceNo = LINUX_OS;
        } else {
            cmd->OpCode = GDT_INIT;
            cmd->u.cache.DeviceNo = LINUX_OS;
        }

        status = __gdth_execute(ha->sdev, cmd, cmnd, 30, &info);
        i = 0;
        hdr_cnt = (status == S_OK ? (u16)info : 0);
    } else {
        i = rsc->hdr_no;
        hdr_cnt = i + 1;
    }

    for (; i < hdr_cnt && i < MAX_HDRIVES; ++i) {
        cmd->Service = CACHESERVICE;
        cmd->OpCode = GDT_INFO;
        if (ha->cache_feat & GDT_64BIT) 
            cmd->u.cache64.DeviceNo = i;
        else 
            cmd->u.cache.DeviceNo = i;

        status = __gdth_execute(ha->sdev, cmd, cmnd, 30, &info);

        spin_lock_irqsave(&ha->smp_lock, flags);
        rsc->hdr_list[i].bus = ha->virt_bus;
        rsc->hdr_list[i].target = i;
        rsc->hdr_list[i].lun = 0;
        if (status != S_OK) {
            ha->hdr[i].present = FALSE;
        } else {
            ha->hdr[i].present = TRUE;
            ha->hdr[i].size = info;
            /* evaluate mapping */
            ha->hdr[i].size &= ~SECS32;
            gdth_eval_mapping(ha->hdr[i].size,&cyls,&hds,&secs); 
            ha->hdr[i].heads = hds;
            ha->hdr[i].secs = secs;
            /* round size */
            ha->hdr[i].size = cyls * hds * secs;
        }
        spin_unlock_irqrestore(&ha->smp_lock, flags);
        if (status != S_OK)
            continue; 
        
        /* extended info, if GDT_64BIT, for drives > 2 TB */
        /* but we need ha->info2, not yet stored in scp->SCp */

        /* devtype, cluster info, R/W attribs */
        cmd->Service = CACHESERVICE;
        cmd->OpCode = GDT_DEVTYPE;
        if (ha->cache_feat & GDT_64BIT) 
            cmd->u.cache64.DeviceNo = i;
        else
            cmd->u.cache.DeviceNo = i;

        status = __gdth_execute(ha->sdev, cmd, cmnd, 30, &info);

        spin_lock_irqsave(&ha->smp_lock, flags);
        ha->hdr[i].devtype = (status == S_OK ? (u16)info : 0);
        spin_unlock_irqrestore(&ha->smp_lock, flags);

        cmd->Service = CACHESERVICE;
        cmd->OpCode = GDT_CLUST_INFO;
        if (ha->cache_feat & GDT_64BIT) 
            cmd->u.cache64.DeviceNo = i;
        else
            cmd->u.cache.DeviceNo = i;

        status = __gdth_execute(ha->sdev, cmd, cmnd, 30, &info);

        spin_lock_irqsave(&ha->smp_lock, flags);
        ha->hdr[i].cluster_type = 
            ((status == S_OK && !shared_access) ? (u16)info : 0);
        spin_unlock_irqrestore(&ha->smp_lock, flags);
        rsc->hdr_list[i].cluster_type = ha->hdr[i].cluster_type;

        cmd->Service = CACHESERVICE;
        cmd->OpCode = GDT_RW_ATTRIBS;
        if (ha->cache_feat & GDT_64BIT) 
            cmd->u.cache64.DeviceNo = i;
        else
            cmd->u.cache.DeviceNo = i;

        status = __gdth_execute(ha->sdev, cmd, cmnd, 30, &info);

        spin_lock_irqsave(&ha->smp_lock, flags);
        ha->hdr[i].rw_attribs = (status == S_OK ? (u16)info : 0);
        spin_unlock_irqrestore(&ha->smp_lock, flags);
    }
 
    if (copy_to_user(arg, rsc, sizeof(gdth_ioctl_rescan)))
        rc = -EFAULT;
    else
        rc = 0;

free_fail:
    kfree(rsc);
    kfree(cmd);
    return rc;
}
  
static int gdth_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
    gdth_ha_str *ha; 
    struct scsi_cmnd *scp;
    unsigned long flags;
    char cmnd[MAX_COMMAND_SIZE];   
    void __user *argp = (void __user *)arg;

    memset(cmnd, 0xff, 12);
    
    TRACE(("gdth_ioctl() cmd 0x%x\n", cmd));
 
    switch (cmd) {
      case GDTIOCTL_CTRCNT:
      { 
        int cnt = gdth_ctr_count;
        if (put_user(cnt, (int __user *)argp))
                return -EFAULT;
        break;
      }

      case GDTIOCTL_DRVERS:
      { 
        int ver = (GDTH_VERSION<<8) | GDTH_SUBVERSION;
        if (put_user(ver, (int __user *)argp))
                return -EFAULT;
        break;
      }
      
      case GDTIOCTL_OSVERS:
      { 
        gdth_ioctl_osvers osv; 

        osv.version = (u8)(LINUX_VERSION_CODE >> 16);
        osv.subversion = (u8)(LINUX_VERSION_CODE >> 8);
        osv.revision = (u16)(LINUX_VERSION_CODE & 0xff);
        if (copy_to_user(argp, &osv, sizeof(gdth_ioctl_osvers)))
                return -EFAULT;
        break;
      }

      case GDTIOCTL_CTRTYPE:
      { 
        gdth_ioctl_ctrtype ctrt;
        
        if (copy_from_user(&ctrt, argp, sizeof(gdth_ioctl_ctrtype)) ||
            (NULL == (ha = gdth_find_ha(ctrt.ionode))))
            return -EFAULT;

        if (ha->type != GDT_PCIMPR) {
	    ctrt.type = (u8)((ha->stype<<4) + 6);
        } else {
            ctrt.type =  (ha->oem_id == OEM_ID_INTEL ? 0xfd : 0xfe);
            if (ha->stype >= 0x300)
                ctrt.ext_type = 0x6000 | ha->pdev->subsystem_device;
            else
                ctrt.ext_type = 0x6000 | ha->stype;
        }
        ctrt.device_id = ha->pdev->device;
        ctrt.sub_device_id = ha->pdev->subsystem_device;
        ctrt.info = ha->brd_phys;
        ctrt.oem_id = ha->oem_id;
        if (copy_to_user(argp, &ctrt, sizeof(gdth_ioctl_ctrtype)))
            return -EFAULT;
        break;
      }
        
      case GDTIOCTL_GENERAL:
        return ioc_general(argp, cmnd);

      case GDTIOCTL_EVENT:
        return ioc_event(argp);

      case GDTIOCTL_LOCKDRV:
        return ioc_lockdrv(argp);

      case GDTIOCTL_LOCKCHN:
      {
        gdth_ioctl_lockchn lchn;
        u8 i, j;

        if (copy_from_user(&lchn, argp, sizeof(gdth_ioctl_lockchn)) ||
            (NULL == (ha = gdth_find_ha(lchn.ionode))))
            return -EFAULT;

        i = lchn.channel;
        if (i < ha->bus_cnt) {
            if (lchn.lock) {
                spin_lock_irqsave(&ha->smp_lock, flags);
                ha->raw[i].lock = 1;
                spin_unlock_irqrestore(&ha->smp_lock, flags);
		for (j = 0; j < ha->tid_cnt; ++j)
                    gdth_wait_completion(ha, i, j);
            } else {
                spin_lock_irqsave(&ha->smp_lock, flags);
                ha->raw[i].lock = 0;
                spin_unlock_irqrestore(&ha->smp_lock, flags);
		for (j = 0; j < ha->tid_cnt; ++j)
                    gdth_next(ha);
            }
        } 
        break;
      }

      case GDTIOCTL_RESCAN:
        return ioc_rescan(argp, cmnd);

      case GDTIOCTL_HDRLIST:
        return ioc_hdrlist(argp, cmnd);

      case GDTIOCTL_RESET_BUS:
      {
        gdth_ioctl_reset res;
        int rval;

        if (copy_from_user(&res, argp, sizeof(gdth_ioctl_reset)) ||
            (NULL == (ha = gdth_find_ha(res.ionode))))
            return -EFAULT;

        scp  = kzalloc(sizeof(*scp), GFP_KERNEL);
        if (!scp)
            return -ENOMEM;
        scp->device = ha->sdev;
        scp->cmd_len = 12;
        scp->device->channel = res.number;
        rval = gdth_eh_bus_reset(scp);
        res.status = (rval == SUCCESS ? S_OK : S_GENERR);
        kfree(scp);

        if (copy_to_user(argp, &res, sizeof(gdth_ioctl_reset)))
            return -EFAULT;
        break;
      }

      case GDTIOCTL_RESET_DRV:
        return ioc_resetdrv(argp, cmnd);

      default:
        break; 
    }
    return 0;
}

static long gdth_unlocked_ioctl(struct file *file, unsigned int cmd,
			        unsigned long arg)
{
	int ret;

	mutex_lock(&gdth_mutex);
	ret = gdth_ioctl(file, cmd, arg);
	mutex_unlock(&gdth_mutex);

	return ret;
}

/* flush routine */
static void gdth_flush(gdth_ha_str *ha)
{
    int             i;
    gdth_cmd_str    gdtcmd;
    char            cmnd[MAX_COMMAND_SIZE];   
    memset(cmnd, 0xff, MAX_COMMAND_SIZE);

    TRACE2(("gdth_flush() hanum %d\n", ha->hanum));

    for (i = 0; i < MAX_HDRIVES; ++i) {
        if (ha->hdr[i].present) {
            gdtcmd.BoardNode = LOCALBOARD;
            gdtcmd.Service = CACHESERVICE;
            gdtcmd.OpCode = GDT_FLUSH;
            if (ha->cache_feat & GDT_64BIT) { 
                gdtcmd.u.cache64.DeviceNo = i;
                gdtcmd.u.cache64.BlockNo = 1;
                gdtcmd.u.cache64.sg_canz = 0;
            } else {
                gdtcmd.u.cache.DeviceNo = i;
                gdtcmd.u.cache.BlockNo = 1;
                gdtcmd.u.cache.sg_canz = 0;
            }
            TRACE2(("gdth_flush(): flush ha %d drive %d\n", ha->hanum, i));

            gdth_execute(ha->shost, &gdtcmd, cmnd, 30, NULL);
        }
    }
}

/* configure lun */
static int gdth_slave_configure(struct scsi_device *sdev)
{
    sdev->skip_ms_page_3f = 1;
    sdev->skip_ms_page_8 = 1;
    return 0;
}

static struct scsi_host_template gdth_template = {
        .name                   = "GDT SCSI Disk Array Controller",
        .info                   = gdth_info, 
        .queuecommand           = gdth_queuecommand,
        .eh_bus_reset_handler   = gdth_eh_bus_reset,
        .slave_configure        = gdth_slave_configure,
        .bios_param             = gdth_bios_param,
        .show_info              = gdth_show_info,
        .write_info             = gdth_set_info,
	.eh_timed_out		= gdth_timed_out,
        .proc_name              = "gdth",
        .can_queue              = GDTH_MAXCMDS,
        .this_id                = -1,
        .sg_tablesize           = GDTH_MAXSG,
        .cmd_per_lun            = GDTH_MAXC_P_L,
        .unchecked_isa_dma      = 1,
	.no_write_same		= 1,
};

static int gdth_pci_probe_one(gdth_pci_str *pcistr, gdth_ha_str **ha_out)
{
	struct Scsi_Host *shp;
	gdth_ha_str *ha;
	dma_addr_t scratch_dma_handle = 0;
	int error, i;
	struct pci_dev *pdev = pcistr->pdev;

	*ha_out = NULL;

	shp = scsi_host_alloc(&gdth_template, sizeof(gdth_ha_str));
	if (!shp)
		return -ENOMEM;
	ha = shost_priv(shp);

	error = -ENODEV;
	if (!gdth_init_pci(pdev, pcistr, ha))
		goto out_host_put;

	/* controller found and initialized */
	printk("Configuring GDT-PCI HA at %d/%d IRQ %u\n",
		pdev->bus->number,
		PCI_SLOT(pdev->devfn),
		ha->irq);

	error = request_irq(ha->irq, gdth_interrupt,
				IRQF_SHARED, "gdth", ha);
	if (error) {
		printk("GDT-PCI: Unable to allocate IRQ\n");
		goto out_host_put;
	}

	shp->unchecked_isa_dma = 0;
	shp->irq = ha->irq;
	shp->dma_channel = 0xff;

	ha->hanum = gdth_ctr_count++;
	ha->shost = shp;

	ha->pccb = &ha->cmdext;
	ha->ccb_phys = 0L;

	error = -ENOMEM;

	ha->pscratch = dma_alloc_coherent(&ha->pdev->dev, GDTH_SCRATCH,
				&scratch_dma_handle, GFP_KERNEL);
	if (!ha->pscratch)
		goto out_free_irq;
	ha->scratch_phys = scratch_dma_handle;

	ha->pmsg = dma_alloc_coherent(&ha->pdev->dev, sizeof(gdth_msg_str),
				&scratch_dma_handle, GFP_KERNEL);
	if (!ha->pmsg)
		goto out_free_pscratch;
	ha->msg_phys = scratch_dma_handle;

	ha->scratch_busy = FALSE;
	ha->req_first = NULL;
	ha->tid_cnt = pdev->device >= 0x200 ? MAXID : MAX_HDRIVES;
	if (max_ids > 0 && max_ids < ha->tid_cnt)
		ha->tid_cnt = max_ids;
	for (i = 0; i < GDTH_MAXCMDS; ++i)
		ha->cmd_tab[i].cmnd = UNUSED_CMND;
	ha->scan_mode = rescan ? 0x10 : 0;

	error = -ENODEV;
	if (!gdth_search_drives(ha)) {
		printk("GDT-PCI %d: Error during device scan\n", ha->hanum);
		goto out_free_pmsg;
	}

	if (hdr_channel < 0 || hdr_channel > ha->bus_cnt)
		hdr_channel = ha->bus_cnt;
	ha->virt_bus = hdr_channel;

	/* 64-bit DMA only supported from FW >= x.43 */
	if (!(ha->cache_feat & ha->raw_feat & ha->screen_feat & GDT_64BIT) ||
	    !ha->dma64_support) {
		if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
			printk(KERN_WARNING "GDT-PCI %d: "
				"Unable to set 32-bit DMA\n", ha->hanum);
				goto out_free_pmsg;
		}
	} else {
		shp->max_cmd_len = 16;
		if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
			printk("GDT-PCI %d: 64-bit DMA enabled\n", ha->hanum);
		} else if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
			printk(KERN_WARNING "GDT-PCI %d: "
				"Unable to set 64/32-bit DMA\n", ha->hanum);
			goto out_free_pmsg;
		}
	}

	shp->max_id      = ha->tid_cnt;
	shp->max_lun     = MAXLUN;
	shp->max_channel = ha->bus_cnt;

	spin_lock_init(&ha->smp_lock);
	gdth_enable_int(ha);

	error = scsi_add_host(shp, &pdev->dev);
	if (error)
		goto out_free_pmsg;
	list_add_tail(&ha->list, &gdth_instances);

	pci_set_drvdata(ha->pdev, ha);
	gdth_timer_init();

	scsi_scan_host(shp);

	*ha_out = ha;

	return 0;

 out_free_pmsg:
	dma_free_coherent(&ha->pdev->dev, sizeof(gdth_msg_str),
				ha->pmsg, ha->msg_phys);
 out_free_pscratch:
	dma_free_coherent(&ha->pdev->dev, GDTH_SCRATCH,
				ha->pscratch, ha->scratch_phys);
 out_free_irq:
	free_irq(ha->irq, ha);
	gdth_ctr_count--;
 out_host_put:
	scsi_host_put(shp);
	return error;
}

static void gdth_remove_one(gdth_ha_str *ha)
{
	struct Scsi_Host *shp = ha->shost;

	TRACE2(("gdth_remove_one()\n"));

	scsi_remove_host(shp);

	gdth_flush(ha);

	if (ha->sdev) {
		scsi_free_host_dev(ha->sdev);
		ha->sdev = NULL;
	}

	if (shp->irq)
		free_irq(shp->irq,ha);

	if (ha->pscratch)
		dma_free_coherent(&ha->pdev->dev, GDTH_SCRATCH,
			ha->pscratch, ha->scratch_phys);
	if (ha->pmsg)
		dma_free_coherent(&ha->pdev->dev, sizeof(gdth_msg_str),
			ha->pmsg, ha->msg_phys);
	if (ha->ccb_phys)
		dma_unmap_single(&ha->pdev->dev, ha->ccb_phys,
			sizeof(gdth_cmd_str), DMA_BIDIRECTIONAL);

	scsi_host_put(shp);
}

static int gdth_halt(struct notifier_block *nb, unsigned long event, void *buf)
{
	gdth_ha_str *ha;

	TRACE2(("gdth_halt() event %d\n", (int)event));
	if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF)
		return NOTIFY_DONE;

	list_for_each_entry(ha, &gdth_instances, list)
		gdth_flush(ha);

	return NOTIFY_OK;
}

static struct notifier_block gdth_notifier = {
    gdth_halt, NULL, 0
};

static int __init gdth_init(void)
{
	if (disable) {
		printk("GDT-HA: Controller driver disabled from"
                       " command line !\n");
		return 0;
	}

	printk("GDT-HA: Storage RAID Controller Driver. Version: %s\n",
	       GDTH_VERSION_STR);

	/* initializations */
	gdth_polling = TRUE;
	gdth_clear_events();
	timer_setup(&gdth_timer, gdth_timeout, 0);

	/* scanning for PCI controllers */
	if (pci_register_driver(&gdth_pci_driver)) {
		gdth_ha_str *ha;

		list_for_each_entry(ha, &gdth_instances, list)
			gdth_remove_one(ha);
		return -ENODEV;
	}

	TRACE2(("gdth_detect() %d controller detected\n", gdth_ctr_count));

	major = register_chrdev(0,"gdth", &gdth_fops);
	register_reboot_notifier(&gdth_notifier);
	gdth_polling = FALSE;
	return 0;
}

static void __exit gdth_exit(void)
{
	gdth_ha_str *ha;

	unregister_chrdev(major, "gdth");
	unregister_reboot_notifier(&gdth_notifier);

#ifdef GDTH_STATISTICS
	del_timer_sync(&gdth_timer);
#endif

	pci_unregister_driver(&gdth_pci_driver);

	list_for_each_entry(ha, &gdth_instances, list)
		gdth_remove_one(ha);
}

module_init(gdth_init);
module_exit(gdth_exit);

#ifndef MODULE
__setup("gdth=", option_setup);
#endif