Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 3127 insertions, 0 deletions

diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
new file mode 100644
index 00000000..cbde1dca
--- /dev/null
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -0,0 +1,3127 @@
+/*
+*******************************************************************************
+**        O.S   : Linux
+**   FILE NAME  : arcmsr_hba.c
+**        BY    : Nick Cheng
+**   Description: SCSI RAID Device Driver for
+**                ARECA RAID Host adapter
+*******************************************************************************
+** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved
+**
+**     Web site: www.areca.com.tw
+**       E-mail: support@areca.com.tw
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License version 2 as
+** published by the Free Software Foundation.
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+** GNU General Public License for more details.
+*******************************************************************************
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions
+** are met:
+** 1. Redistributions of source code must retain the above copyright
+**    notice, this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright
+**    notice, this list of conditions and the following disclaimer in the
+**    documentation and/or other materials provided with the distribution.
+** 3. The name of the author may not be used to endorse or promote products
+**    derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
+** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
+** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*******************************************************************************
+** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
+**     Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
+*******************************************************************************
+*/
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/spinlock.h>
+#include <linux/pci_ids.h>
+#include <linux/interrupt.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/aer.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsicam.h>
+#include "arcmsr.h"
+MODULE_AUTHOR("Nick Cheng <support@areca.com.tw>");
+MODULE_DESCRIPTION("ARECA (ARC11xx/12xx/16xx/1880) SATA/SAS RAID Host Bus Adapter");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(ARCMSR_DRIVER_VERSION);
+
+#define	ARCMSR_SLEEPTIME	10
+#define	ARCMSR_RETRYCOUNT	12
+
+wait_queue_head_t wait_q;
+static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
+					struct scsi_cmnd *cmd);
+static int arcmsr_iop_confirm(struct AdapterControlBlock *acb);
+static int arcmsr_abort(struct scsi_cmnd *);
+static int arcmsr_bus_reset(struct scsi_cmnd *);
+static int arcmsr_bios_param(struct scsi_device *sdev,
+		struct block_device *bdev, sector_t capacity, int *info);
+static int arcmsr_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
+static int arcmsr_probe(struct pci_dev *pdev,
+				const struct pci_device_id *id);
+static void arcmsr_remove(struct pci_dev *pdev);
+static void arcmsr_shutdown(struct pci_dev *pdev);
+static void arcmsr_iop_init(struct AdapterControlBlock *acb);
+static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb);
+static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb);
+static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
+static void arcmsr_flush_hba_cache(struct AdapterControlBlock *acb);
+static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb);
+static void arcmsr_request_device_map(unsigned long pacb);
+static void arcmsr_request_hba_device_map(struct AdapterControlBlock *acb);
+static void arcmsr_request_hbb_device_map(struct AdapterControlBlock *acb);
+static void arcmsr_request_hbc_device_map(struct AdapterControlBlock *acb);
+static void arcmsr_message_isr_bh_fn(struct work_struct *work);
+static bool arcmsr_get_firmware_spec(struct AdapterControlBlock *acb);
+static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb);
+static void arcmsr_hbc_message_isr(struct AdapterControlBlock *pACB);
+static void arcmsr_hardware_reset(struct AdapterControlBlock *acb);
+static const char *arcmsr_info(struct Scsi_Host *);
+static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
+static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev,
+					  int queue_depth, int reason)
+{
+	if (reason != SCSI_QDEPTH_DEFAULT)
+		return -EOPNOTSUPP;
+
+	if (queue_depth > ARCMSR_MAX_CMD_PERLUN)
+		queue_depth = ARCMSR_MAX_CMD_PERLUN;
+	scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
+	return queue_depth;
+}
+
+static struct scsi_host_template arcmsr_scsi_host_template = {
+	.module			= THIS_MODULE,
+	.name			= "ARCMSR ARECA SATA/SAS RAID Controller"
+				ARCMSR_DRIVER_VERSION,
+	.info			= arcmsr_info,
+	.queuecommand		= arcmsr_queue_command,
+	.eh_abort_handler		= arcmsr_abort,
+	.eh_bus_reset_handler	= arcmsr_bus_reset,
+	.bios_param		= arcmsr_bios_param,
+	.change_queue_depth	= arcmsr_adjust_disk_queue_depth,
+	.can_queue		= ARCMSR_MAX_FREECCB_NUM,
+	.this_id			= ARCMSR_SCSI_INITIATOR_ID,
+	.sg_tablesize	        	= ARCMSR_DEFAULT_SG_ENTRIES, 
+	.max_sectors    	    	= ARCMSR_MAX_XFER_SECTORS_C, 
+	.cmd_per_lun		= ARCMSR_MAX_CMD_PERLUN,
+	.use_clustering		= ENABLE_CLUSTERING,
+	.shost_attrs		= arcmsr_host_attrs,
+};
+static struct pci_device_id arcmsr_device_id_table[] = {
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1110)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1120)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1130)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1160)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1170)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1200)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1201)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1202)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1210)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1220)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1230)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1260)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1270)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1280)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1380)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1381)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1680)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1681)},
+	{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1880)},
+	{0, 0}, /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(pci, arcmsr_device_id_table);
+static struct pci_driver arcmsr_pci_driver = {
+	.name			= "arcmsr",
+	.id_table			= arcmsr_device_id_table,
+	.probe			= arcmsr_probe,
+	.remove			= arcmsr_remove,
+	.shutdown		= arcmsr_shutdown,
+};
+/*
+****************************************************************************
+****************************************************************************
+*/
+
+static void arcmsr_free_hbb_mu(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A:
+	case ACB_ADAPTER_TYPE_C:
+		break;
+	case ACB_ADAPTER_TYPE_B:{
+		dma_free_coherent(&acb->pdev->dev,
+			sizeof(struct MessageUnit_B),
+			acb->pmuB, acb->dma_coherent_handle_hbb_mu);
+	}
+	}
+}
+
+static bool arcmsr_remap_pciregion(struct AdapterControlBlock *acb)
+{
+	struct pci_dev *pdev = acb->pdev;
+	switch (acb->adapter_type){
+	case ACB_ADAPTER_TYPE_A:{
+		acb->pmuA = ioremap(pci_resource_start(pdev,0), pci_resource_len(pdev,0));
+		if (!acb->pmuA) {
+			printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
+			return false;
+		}
+		break;
+	}
+	case ACB_ADAPTER_TYPE_B:{
+		void __iomem *mem_base0, *mem_base1;
+		mem_base0 = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+		if (!mem_base0) {
+			printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
+			return false;
+		}
+		mem_base1 = ioremap(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
+		if (!mem_base1) {
+			iounmap(mem_base0);
+			printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
+			return false;
+		}
+		acb->mem_base0 = mem_base0;
+		acb->mem_base1 = mem_base1;
+		break;
+	}
+	case ACB_ADAPTER_TYPE_C:{
+		acb->pmuC = ioremap_nocache(pci_resource_start(pdev, 1), pci_resource_len(pdev, 1));
+		if (!acb->pmuC) {
+			printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
+			return false;
+		}
+		if (readl(&acb->pmuC->outbound_doorbell) & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
+			writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &acb->pmuC->outbound_doorbell_clear);/*clear interrupt*/
+			return true;
+		}
+		break;
+	}
+	}
+	return true;
+}
+
+static void arcmsr_unmap_pciregion(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A:{
+		iounmap(acb->pmuA);
+	}
+	break;
+	case ACB_ADAPTER_TYPE_B:{
+		iounmap(acb->mem_base0);
+		iounmap(acb->mem_base1);
+	}
+
+	break;
+	case ACB_ADAPTER_TYPE_C:{
+		iounmap(acb->pmuC);
+	}
+	}
+}
+
+static irqreturn_t arcmsr_do_interrupt(int irq, void *dev_id)
+{
+	irqreturn_t handle_state;
+	struct AdapterControlBlock *acb = dev_id;
+
+	handle_state = arcmsr_interrupt(acb);
+	return handle_state;
+}
+
+static int arcmsr_bios_param(struct scsi_device *sdev,
+		struct block_device *bdev, sector_t capacity, int *geom)
+{
+	int ret, heads, sectors, cylinders, total_capacity;
+	unsigned char *buffer;/* return copy of block device's partition table */
+
+	buffer = scsi_bios_ptable(bdev);
+	if (buffer) {
+		ret = scsi_partsize(buffer, capacity, &geom[2], &geom[0], &geom[1]);
+		kfree(buffer);
+		if (ret != -1)
+			return ret;
+	}
+	total_capacity = capacity;
+	heads = 64;
+	sectors = 32;
+	cylinders = total_capacity / (heads * sectors);
+	if (cylinders > 1024) {
+		heads = 255;
+		sectors = 63;
+		cylinders = total_capacity / (heads * sectors);
+	}
+	geom[0] = heads;
+	geom[1] = sectors;
+	geom[2] = cylinders;
+	return 0;
+}
+
+static void arcmsr_define_adapter_type(struct AdapterControlBlock *acb)
+{
+	struct pci_dev *pdev = acb->pdev;
+	u16 dev_id;
+	pci_read_config_word(pdev, PCI_DEVICE_ID, &dev_id);
+	acb->dev_id = dev_id;
+	switch (dev_id) {
+	case 0x1880: {
+		acb->adapter_type = ACB_ADAPTER_TYPE_C;
+		}
+		break;
+	case 0x1201: {
+		acb->adapter_type = ACB_ADAPTER_TYPE_B;
+		}
+		break;
+
+	default: acb->adapter_type = ACB_ADAPTER_TYPE_A;
+	}
+}
+
+static uint8_t arcmsr_hba_wait_msgint_ready(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	int i;
+
+	for (i = 0; i < 2000; i++) {
+		if (readl(&reg->outbound_intstatus) &
+				ARCMSR_MU_OUTBOUND_MESSAGE0_INT) {
+			writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT,
+				&reg->outbound_intstatus);
+			return true;
+		}
+		msleep(10);
+	} /* max 20 seconds */
+
+	return false;
+}
+
+static uint8_t arcmsr_hbb_wait_msgint_ready(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B *reg = acb->pmuB;
+	int i;
+
+	for (i = 0; i < 2000; i++) {
+		if (readl(reg->iop2drv_doorbell)
+			& ARCMSR_IOP2DRV_MESSAGE_CMD_DONE) {
+			writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN,
+					reg->iop2drv_doorbell);
+			writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT,
+					reg->drv2iop_doorbell);
+			return true;
+		}
+		msleep(10);
+	} /* max 20 seconds */
+
+	return false;
+}
+
+static uint8_t arcmsr_hbc_wait_msgint_ready(struct AdapterControlBlock *pACB)
+{
+	struct MessageUnit_C *phbcmu = (struct MessageUnit_C *)pACB->pmuC;
+	int i;
+
+	for (i = 0; i < 2000; i++) {
+		if (readl(&phbcmu->outbound_doorbell)
+				& ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
+			writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR,
+				&phbcmu->outbound_doorbell_clear); /*clear interrupt*/
+			return true;
+		}
+		msleep(10);
+	} /* max 20 seconds */
+
+	return false;
+}
+
+static void arcmsr_flush_hba_cache(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	int retry_count = 30;
+	writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
+	do {
+		if (arcmsr_hba_wait_msgint_ready(acb))
+			break;
+		else {
+			retry_count--;
+			printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
+			timeout, retry count down = %d \n", acb->host->host_no, retry_count);
+		}
+	} while (retry_count != 0);
+}
+
+static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B *reg = acb->pmuB;
+	int retry_count = 30;
+	writel(ARCMSR_MESSAGE_FLUSH_CACHE, reg->drv2iop_doorbell);
+	do {
+		if (arcmsr_hbb_wait_msgint_ready(acb))
+			break;
+		else {
+			retry_count--;
+			printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
+			timeout,retry count down = %d \n", acb->host->host_no, retry_count);
+		}
+	} while (retry_count != 0);
+}
+
+static void arcmsr_flush_hbc_cache(struct AdapterControlBlock *pACB)
+{
+	struct MessageUnit_C *reg = (struct MessageUnit_C *)pACB->pmuC;
+	int retry_count = 30;/* enlarge wait flush adapter cache time: 10 minute */
+	writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
+	writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
+	do {
+		if (arcmsr_hbc_wait_msgint_ready(pACB)) {
+			break;
+		} else {
+			retry_count--;
+			printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
+			timeout,retry count down = %d \n", pACB->host->host_no, retry_count);
+		}
+	} while (retry_count != 0);
+	return;
+}
+static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		arcmsr_flush_hba_cache(acb);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		arcmsr_flush_hbb_cache(acb);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		arcmsr_flush_hbc_cache(acb);
+		}
+	}
+}
+
+static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
+{
+	struct pci_dev *pdev = acb->pdev;
+	void *dma_coherent;
+	dma_addr_t dma_coherent_handle;
+	struct CommandControlBlock *ccb_tmp;
+	int i = 0, j = 0;
+	dma_addr_t cdb_phyaddr;
+	unsigned long roundup_ccbsize;
+	unsigned long max_xfer_len;
+	unsigned long max_sg_entrys;
+	uint32_t  firm_config_version;
+
+	for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
+		for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
+			acb->devstate[i][j] = ARECA_RAID_GONE;
+
+	max_xfer_len = ARCMSR_MAX_XFER_LEN;
+	max_sg_entrys = ARCMSR_DEFAULT_SG_ENTRIES;
+	firm_config_version = acb->firm_cfg_version;
+	if((firm_config_version & 0xFF) >= 3){
+		max_xfer_len = (ARCMSR_CDB_SG_PAGE_LENGTH << ((firm_config_version >> 8) & 0xFF)) * 1024;/* max 4M byte */
+		max_sg_entrys = (max_xfer_len/4096);
+	}
+	acb->host->max_sectors = max_xfer_len/512;
+	acb->host->sg_tablesize = max_sg_entrys;
+	roundup_ccbsize = roundup(sizeof(struct CommandControlBlock) + (max_sg_entrys - 1) * sizeof(struct SG64ENTRY), 32);
+	acb->uncache_size = roundup_ccbsize * ARCMSR_MAX_FREECCB_NUM;
+	dma_coherent = dma_alloc_coherent(&pdev->dev, acb->uncache_size, &dma_coherent_handle, GFP_KERNEL);
+	if(!dma_coherent){
+		printk(KERN_NOTICE "arcmsr%d: dma_alloc_coherent got error\n", acb->host->host_no);
+		return -ENOMEM;
+	}
+	acb->dma_coherent = dma_coherent;
+	acb->dma_coherent_handle = dma_coherent_handle;
+	memset(dma_coherent, 0, acb->uncache_size);
+	ccb_tmp = dma_coherent;
+	acb->vir2phy_offset = (unsigned long)dma_coherent - (unsigned long)dma_coherent_handle;
+	for(i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++){
+		cdb_phyaddr = dma_coherent_handle + offsetof(struct CommandControlBlock, arcmsr_cdb);
+		ccb_tmp->cdb_phyaddr_pattern = ((acb->adapter_type == ACB_ADAPTER_TYPE_C) ? cdb_phyaddr : (cdb_phyaddr >> 5));
+		acb->pccb_pool[i] = ccb_tmp;
+		ccb_tmp->acb = acb;
+		INIT_LIST_HEAD(&ccb_tmp->list);
+		list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
+		ccb_tmp = (struct CommandControlBlock *)((unsigned long)ccb_tmp + roundup_ccbsize);
+		dma_coherent_handle = dma_coherent_handle + roundup_ccbsize;
+	}
+	return 0;
+}
+
+static void arcmsr_message_isr_bh_fn(struct work_struct *work) 
+{
+	struct AdapterControlBlock *acb = container_of(work,struct AdapterControlBlock, arcmsr_do_message_isr_bh);
+	switch (acb->adapter_type) {
+		case ACB_ADAPTER_TYPE_A: {
+
+			struct MessageUnit_A __iomem *reg  = acb->pmuA;
+			char *acb_dev_map = (char *)acb->device_map;
+			uint32_t __iomem *signature = (uint32_t __iomem*) (&reg->message_rwbuffer[0]);
+			char __iomem *devicemap = (char __iomem*) (&reg->message_rwbuffer[21]);
+			int target, lun;
+			struct scsi_device *psdev;
+			char diff;
+
+			atomic_inc(&acb->rq_map_token);
+			if (readl(signature) == ARCMSR_SIGNATURE_GET_CONFIG) {
+				for(target = 0; target < ARCMSR_MAX_TARGETID -1; target++) {
+					diff = (*acb_dev_map)^readb(devicemap);
+					if (diff != 0) {
+						char temp;
+						*acb_dev_map = readb(devicemap);
+						temp =*acb_dev_map;
+						for(lun = 0; lun < ARCMSR_MAX_TARGETLUN; lun++) {
+							if((temp & 0x01)==1 && (diff & 0x01) == 1) {	
+								scsi_add_device(acb->host, 0, target, lun);
+							}else if((temp & 0x01) == 0 && (diff & 0x01) == 1) {
+								psdev = scsi_device_lookup(acb->host, 0, target, lun);
+								if (psdev != NULL ) {
+									scsi_remove_device(psdev);
+									scsi_device_put(psdev);
+								}
+							}
+							temp >>= 1;
+							diff >>= 1;
+						}
+					}
+					devicemap++;
+					acb_dev_map++;
+				}
+			}
+			break;
+		}
+
+		case ACB_ADAPTER_TYPE_B: {
+			struct MessageUnit_B *reg  = acb->pmuB;
+			char *acb_dev_map = (char *)acb->device_map;
+			uint32_t __iomem *signature = (uint32_t __iomem*)(&reg->message_rwbuffer[0]);
+			char __iomem *devicemap = (char __iomem*)(&reg->message_rwbuffer[21]);
+			int target, lun;
+			struct scsi_device *psdev;
+			char diff;
+
+			atomic_inc(&acb->rq_map_token);
+			if (readl(signature) == ARCMSR_SIGNATURE_GET_CONFIG) {
+				for(target = 0; target < ARCMSR_MAX_TARGETID -1; target++) {
+					diff = (*acb_dev_map)^readb(devicemap);
+					if (diff != 0) {
+						char temp;
+						*acb_dev_map = readb(devicemap);
+						temp =*acb_dev_map;
+						for(lun = 0; lun < ARCMSR_MAX_TARGETLUN; lun++) {
+							if((temp & 0x01)==1 && (diff & 0x01) == 1) {	
+								scsi_add_device(acb->host, 0, target, lun);
+							}else if((temp & 0x01) == 0 && (diff & 0x01) == 1) {
+								psdev = scsi_device_lookup(acb->host, 0, target, lun);
+								if (psdev != NULL ) {
+									scsi_remove_device(psdev);
+									scsi_device_put(psdev);
+								}
+							}
+							temp >>= 1;
+							diff >>= 1;
+						}
+					}
+					devicemap++;
+					acb_dev_map++;
+				}
+			}
+		}
+		break;
+		case ACB_ADAPTER_TYPE_C: {
+			struct MessageUnit_C *reg  = acb->pmuC;
+			char *acb_dev_map = (char *)acb->device_map;
+			uint32_t __iomem *signature = (uint32_t __iomem *)(&reg->msgcode_rwbuffer[0]);
+			char __iomem *devicemap = (char __iomem *)(&reg->msgcode_rwbuffer[21]);
+			int target, lun;
+			struct scsi_device *psdev;
+			char diff;
+
+			atomic_inc(&acb->rq_map_token);
+			if (readl(signature) == ARCMSR_SIGNATURE_GET_CONFIG) {
+				for (target = 0; target < ARCMSR_MAX_TARGETID - 1; target++) {
+					diff = (*acb_dev_map)^readb(devicemap);
+					if (diff != 0) {
+						char temp;
+						*acb_dev_map = readb(devicemap);
+						temp = *acb_dev_map;
+						for (lun = 0; lun < ARCMSR_MAX_TARGETLUN; lun++) {
+							if ((temp & 0x01) == 1 && (diff & 0x01) == 1) {
+								scsi_add_device(acb->host, 0, target, lun);
+							} else if ((temp & 0x01) == 0 && (diff & 0x01) == 1) {
+								psdev = scsi_device_lookup(acb->host, 0, target, lun);
+								if (psdev != NULL) {
+									scsi_remove_device(psdev);
+									scsi_device_put(psdev);
+								}
+							}
+							temp >>= 1;
+							diff >>= 1;
+						}
+					}
+					devicemap++;
+					acb_dev_map++;
+				}
+			}
+		}
+	}
+}
+
+static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct Scsi_Host *host;
+	struct AdapterControlBlock *acb;
+	uint8_t bus,dev_fun;
+	int error;
+	error = pci_enable_device(pdev);
+	if(error){
+		return -ENODEV;
+	}
+	host = scsi_host_alloc(&arcmsr_scsi_host_template, sizeof(struct AdapterControlBlock));
+	if(!host){
+    		goto pci_disable_dev;
+	}
+	error = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+	if(error){
+		error = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+		if(error){
+			printk(KERN_WARNING
+			       "scsi%d: No suitable DMA mask available\n",
+			       host->host_no);
+			goto scsi_host_release;
+		}
+	}
+	init_waitqueue_head(&wait_q);
+	bus = pdev->bus->number;
+	dev_fun = pdev->devfn;
+	acb = (struct AdapterControlBlock *) host->hostdata;
+	memset(acb,0,sizeof(struct AdapterControlBlock));
+	acb->pdev = pdev;
+	acb->host = host;
+	host->max_lun = ARCMSR_MAX_TARGETLUN;
+	host->max_id = ARCMSR_MAX_TARGETID;		/*16:8*/
+	host->max_cmd_len = 16;	 			/*this is issue of 64bit LBA ,over 2T byte*/
+	host->can_queue = ARCMSR_MAX_FREECCB_NUM;	/* max simultaneous cmds */		
+	host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN;	    
+	host->this_id = ARCMSR_SCSI_INITIATOR_ID;
+	host->unique_id = (bus << 8) | dev_fun;
+	pci_set_drvdata(pdev, host);
+	pci_set_master(pdev);
+	error = pci_request_regions(pdev, "arcmsr");
+	if(error){
+		goto scsi_host_release;
+	}
+	spin_lock_init(&acb->eh_lock);
+	spin_lock_init(&acb->ccblist_lock);
+	acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
+			ACB_F_MESSAGE_RQBUFFER_CLEARED |
+			ACB_F_MESSAGE_WQBUFFER_READED);
+	acb->acb_flags &= ~ACB_F_SCSISTOPADAPTER;
+	INIT_LIST_HEAD(&acb->ccb_free_list);
+	arcmsr_define_adapter_type(acb);
+	error = arcmsr_remap_pciregion(acb);
+	if(!error){
+		goto pci_release_regs;
+	}
+	error = arcmsr_get_firmware_spec(acb);
+	if(!error){
+		goto unmap_pci_region;
+	}
+	error = arcmsr_alloc_ccb_pool(acb);
+	if(error){
+		goto free_hbb_mu;
+	}
+	arcmsr_iop_init(acb);
+	error = scsi_add_host(host, &pdev->dev);
+	if(error){
+		goto RAID_controller_stop;
+	}
+	error = request_irq(pdev->irq, arcmsr_do_interrupt, IRQF_SHARED, "arcmsr", acb);
+	if(error){
+		goto scsi_host_remove;
+	}
+	host->irq = pdev->irq;
+    	scsi_scan_host(host);
+	INIT_WORK(&acb->arcmsr_do_message_isr_bh, arcmsr_message_isr_bh_fn);
+	atomic_set(&acb->rq_map_token, 16);
+	atomic_set(&acb->ante_token_value, 16);
+	acb->fw_flag = FW_NORMAL;
+	init_timer(&acb->eternal_timer);
+	acb->eternal_timer.expires = jiffies + msecs_to_jiffies(6 * HZ);
+	acb->eternal_timer.data = (unsigned long) acb;
+	acb->eternal_timer.function = &arcmsr_request_device_map;
+	add_timer(&acb->eternal_timer);
+	if(arcmsr_alloc_sysfs_attr(acb))
+		goto out_free_sysfs;
+	return 0;
+out_free_sysfs:
+scsi_host_remove:
+	scsi_remove_host(host);
+RAID_controller_stop:
+	arcmsr_stop_adapter_bgrb(acb);
+	arcmsr_flush_adapter_cache(acb);
+	arcmsr_free_ccb_pool(acb);
+free_hbb_mu:
+	arcmsr_free_hbb_mu(acb);
+unmap_pci_region:
+	arcmsr_unmap_pciregion(acb);
+pci_release_regs:
+	pci_release_regions(pdev);
+scsi_host_release:
+	scsi_host_put(host);
+pci_disable_dev:
+	pci_disable_device(pdev);
+	return -ENODEV;
+}
+
+static uint8_t arcmsr_abort_hba_allcmd(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, &reg->inbound_msgaddr0);
+	if (!arcmsr_hba_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE
+			"arcmsr%d: wait 'abort all outstanding command' timeout \n"
+			, acb->host->host_no);
+		return false;
+	}
+	return true;
+}
+
+static uint8_t arcmsr_abort_hbb_allcmd(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B *reg = acb->pmuB;
+
+	writel(ARCMSR_MESSAGE_ABORT_CMD, reg->drv2iop_doorbell);
+	if (!arcmsr_hbb_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE
+			"arcmsr%d: wait 'abort all outstanding command' timeout \n"
+			, acb->host->host_no);
+		return false;
+	}
+	return true;
+}
+static uint8_t arcmsr_abort_hbc_allcmd(struct AdapterControlBlock *pACB)
+{
+	struct MessageUnit_C *reg = (struct MessageUnit_C *)pACB->pmuC;
+	writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, &reg->inbound_msgaddr0);
+	writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
+	if (!arcmsr_hbc_wait_msgint_ready(pACB)) {
+		printk(KERN_NOTICE
+			"arcmsr%d: wait 'abort all outstanding command' timeout \n"
+			, pACB->host->host_no);
+		return false;
+	}
+	return true;
+}
+static uint8_t arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
+{
+	uint8_t rtnval = 0;
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A: {
+		rtnval = arcmsr_abort_hba_allcmd(acb);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		rtnval = arcmsr_abort_hbb_allcmd(acb);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_C: {
+		rtnval = arcmsr_abort_hbc_allcmd(acb);
+		}
+	}
+	return rtnval;
+}
+
+static bool arcmsr_hbb_enable_driver_mode(struct AdapterControlBlock *pacb)
+{
+	struct MessageUnit_B *reg = pacb->pmuB;
+	writel(ARCMSR_MESSAGE_START_DRIVER_MODE, reg->drv2iop_doorbell);
+	if (!arcmsr_hbb_wait_msgint_ready(pacb)) {
+		printk(KERN_ERR "arcmsr%d: can't set driver mode. \n", pacb->host->host_no);
+		return false;
+	}
+    	return true;
+}
+
+static void arcmsr_pci_unmap_dma(struct CommandControlBlock *ccb)
+{
+	struct scsi_cmnd *pcmd = ccb->pcmd;
+
+	scsi_dma_unmap(pcmd);
+}
+
+static void arcmsr_ccb_complete(struct CommandControlBlock *ccb)
+{
+	struct AdapterControlBlock *acb = ccb->acb;
+	struct scsi_cmnd *pcmd = ccb->pcmd;
+	unsigned long flags;
+	atomic_dec(&acb->ccboutstandingcount);
+	arcmsr_pci_unmap_dma(ccb);
+	ccb->startdone = ARCMSR_CCB_DONE;
+	spin_lock_irqsave(&acb->ccblist_lock, flags);
+	list_add_tail(&ccb->list, &acb->ccb_free_list);
+	spin_unlock_irqrestore(&acb->ccblist_lock, flags);
+	pcmd->scsi_done(pcmd);
+}
+
+static void arcmsr_report_sense_info(struct CommandControlBlock *ccb)
+{
+
+	struct scsi_cmnd *pcmd = ccb->pcmd;
+	struct SENSE_DATA *sensebuffer = (struct SENSE_DATA *)pcmd->sense_buffer;
+	pcmd->result = DID_OK << 16;
+	if (sensebuffer) {
+		int sense_data_length =
+			sizeof(struct SENSE_DATA) < SCSI_SENSE_BUFFERSIZE
+			? sizeof(struct SENSE_DATA) : SCSI_SENSE_BUFFERSIZE;
+		memset(sensebuffer, 0, SCSI_SENSE_BUFFERSIZE);
+		memcpy(sensebuffer, ccb->arcmsr_cdb.SenseData, sense_data_length);
+		sensebuffer->ErrorCode = SCSI_SENSE_CURRENT_ERRORS;
+		sensebuffer->Valid = 1;
+	}
+}
+
+static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb)
+{
+	u32 orig_mask = 0;
+	switch (acb->adapter_type) {	
+	case ACB_ADAPTER_TYPE_A : {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		orig_mask = readl(&reg->outbound_intmask);
+		writel(orig_mask|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE, \
+						&reg->outbound_intmask);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_B : {
+		struct MessageUnit_B *reg = acb->pmuB;
+		orig_mask = readl(reg->iop2drv_doorbell_mask);
+		writel(0, reg->iop2drv_doorbell_mask);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C:{
+		struct MessageUnit_C *reg = (struct MessageUnit_C *)acb->pmuC;
+		/* disable all outbound interrupt */
+		orig_mask = readl(&reg->host_int_mask); /* disable outbound message0 int */
+		writel(orig_mask|ARCMSR_HBCMU_ALL_INTMASKENABLE, &reg->host_int_mask);
+		}
+		break;
+	}
+	return orig_mask;
+}
+
+static void arcmsr_report_ccb_state(struct AdapterControlBlock *acb, 
+			struct CommandControlBlock *ccb, bool error)
+{
+	uint8_t id, lun;
+	id = ccb->pcmd->device->id;
+	lun = ccb->pcmd->device->lun;
+	if (!error) {
+		if (acb->devstate[id][lun] == ARECA_RAID_GONE)
+			acb->devstate[id][lun] = ARECA_RAID_GOOD;
+		ccb->pcmd->result = DID_OK << 16;
+		arcmsr_ccb_complete(ccb);
+	}else{
+		switch (ccb->arcmsr_cdb.DeviceStatus) {
+		case ARCMSR_DEV_SELECT_TIMEOUT: {
+			acb->devstate[id][lun] = ARECA_RAID_GONE;
+			ccb->pcmd->result = DID_NO_CONNECT << 16;
+			arcmsr_ccb_complete(ccb);
+			}
+			break;
+
+		case ARCMSR_DEV_ABORTED:
+
+		case ARCMSR_DEV_INIT_FAIL: {
+			acb->devstate[id][lun] = ARECA_RAID_GONE;
+			ccb->pcmd->result = DID_BAD_TARGET << 16;
+			arcmsr_ccb_complete(ccb);
+			}
+			break;
+
+		case ARCMSR_DEV_CHECK_CONDITION: {
+			acb->devstate[id][lun] = ARECA_RAID_GOOD;
+			arcmsr_report_sense_info(ccb);
+			arcmsr_ccb_complete(ccb);
+			}
+			break;
+
+		default:
+			printk(KERN_NOTICE
+				"arcmsr%d: scsi id = %d lun = %d isr get command error done, \
+				but got unknown DeviceStatus = 0x%x \n"
+				, acb->host->host_no
+				, id
+				, lun
+				, ccb->arcmsr_cdb.DeviceStatus);
+				acb->devstate[id][lun] = ARECA_RAID_GONE;
+				ccb->pcmd->result = DID_NO_CONNECT << 16;
+				arcmsr_ccb_complete(ccb);
+			break;
+		}
+	}
+}
+
+static void arcmsr_drain_donequeue(struct AdapterControlBlock *acb, struct CommandControlBlock *pCCB, bool error)
+{
+	int id, lun;
+	if ((pCCB->acb != acb) || (pCCB->startdone != ARCMSR_CCB_START)) {
+		if (pCCB->startdone == ARCMSR_CCB_ABORTED) {
+			struct scsi_cmnd *abortcmd = pCCB->pcmd;
+			if (abortcmd) {
+				id = abortcmd->device->id;
+				lun = abortcmd->device->lun;				
+				abortcmd->result |= DID_ABORT << 16;
+				arcmsr_ccb_complete(pCCB);
+				printk(KERN_NOTICE "arcmsr%d: pCCB ='0x%p' isr got aborted command \n",
+				acb->host->host_no, pCCB);
+			}
+			return;
+		}
+		printk(KERN_NOTICE "arcmsr%d: isr get an illegal ccb command \
+				done acb = '0x%p'"
+				"ccb = '0x%p' ccbacb = '0x%p' startdone = 0x%x"
+				" ccboutstandingcount = %d \n"
+				, acb->host->host_no
+				, acb
+				, pCCB
+				, pCCB->acb
+				, pCCB->startdone
+				, atomic_read(&acb->ccboutstandingcount));
+		  return;
+	}
+	arcmsr_report_ccb_state(acb, pCCB, error);
+}
+
+static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb)
+{
+	int i = 0;
+	uint32_t flag_ccb;
+	struct ARCMSR_CDB *pARCMSR_CDB;
+	bool error;
+	struct CommandControlBlock *pCCB;
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		uint32_t outbound_intstatus;
+		outbound_intstatus = readl(&reg->outbound_intstatus) &
+					acb->outbound_int_enable;
+		/*clear and abort all outbound posted Q*/
+		writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
+		while(((flag_ccb = readl(&reg->outbound_queueport)) != 0xFFFFFFFF)
+				&& (i++ < ARCMSR_MAX_OUTSTANDING_CMD)) {
+			pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));/*frame must be 32 bytes aligned*/
+			pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
+			error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
+			arcmsr_drain_donequeue(acb, pCCB, error);
+		}
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		/*clear all outbound posted Q*/
+		writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell); /* clear doorbell interrupt */
+		for (i = 0; i < ARCMSR_MAX_HBB_POSTQUEUE; i++) {
+			if ((flag_ccb = readl(&reg->done_qbuffer[i])) != 0) {
+				writel(0, &reg->done_qbuffer[i]);
+				pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset+(flag_ccb << 5));/*frame must be 32 bytes aligned*/
+				pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
+				error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
+				arcmsr_drain_donequeue(acb, pCCB, error);
+			}
+			reg->post_qbuffer[i] = 0;
+		}
+		reg->doneq_index = 0;
+		reg->postq_index = 0;
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C *reg = acb->pmuC;
+		struct  ARCMSR_CDB *pARCMSR_CDB;
+		uint32_t flag_ccb, ccb_cdb_phy;
+		bool error;
+		struct CommandControlBlock *pCCB;
+		while ((readl(&reg->host_int_status) & ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR) && (i++ < ARCMSR_MAX_OUTSTANDING_CMD)) {
+			/*need to do*/
+			flag_ccb = readl(&reg->outbound_queueport_low);
+			ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
+			pARCMSR_CDB = (struct  ARCMSR_CDB *)(acb->vir2phy_offset+ccb_cdb_phy);/*frame must be 32 bytes aligned*/
+			pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
+			error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1) ? true : false;
+			arcmsr_drain_donequeue(acb, pCCB, error);
+		}
+	}
+	}
+}
+static void arcmsr_remove(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	struct AdapterControlBlock *acb =
+		(struct AdapterControlBlock *) host->hostdata;
+	int poll_count = 0;
+	arcmsr_free_sysfs_attr(acb);
+	scsi_remove_host(host);
+	flush_work_sync(&acb->arcmsr_do_message_isr_bh);
+	del_timer_sync(&acb->eternal_timer);
+	arcmsr_disable_outbound_ints(acb);
+	arcmsr_stop_adapter_bgrb(acb);
+	arcmsr_flush_adapter_cache(acb);	
+	acb->acb_flags |= ACB_F_SCSISTOPADAPTER;
+	acb->acb_flags &= ~ACB_F_IOP_INITED;
+
+	for (poll_count = 0; poll_count < ARCMSR_MAX_OUTSTANDING_CMD; poll_count++){
+		if (!atomic_read(&acb->ccboutstandingcount))
+			break;
+		arcmsr_interrupt(acb);/* FIXME: need spinlock */
+		msleep(25);
+	}
+
+	if (atomic_read(&acb->ccboutstandingcount)) {
+		int i;
+
+		arcmsr_abort_allcmd(acb);
+		arcmsr_done4abort_postqueue(acb);
+		for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
+			struct CommandControlBlock *ccb = acb->pccb_pool[i];
+			if (ccb->startdone == ARCMSR_CCB_START) {
+				ccb->startdone = ARCMSR_CCB_ABORTED;
+				ccb->pcmd->result = DID_ABORT << 16;
+				arcmsr_ccb_complete(ccb);
+			}
+		}
+	}
+	free_irq(pdev->irq, acb);
+	arcmsr_free_ccb_pool(acb);
+	arcmsr_free_hbb_mu(acb);
+	arcmsr_unmap_pciregion(acb);
+	pci_release_regions(pdev);
+	scsi_host_put(host);
+	pci_disable_device(pdev);
+	pci_set_drvdata(pdev, NULL);
+}
+
+static void arcmsr_shutdown(struct pci_dev *pdev)
+{
+	struct Scsi_Host *host = pci_get_drvdata(pdev);
+	struct AdapterControlBlock *acb =
+		(struct AdapterControlBlock *)host->hostdata;
+	del_timer_sync(&acb->eternal_timer);
+	arcmsr_disable_outbound_ints(acb);
+	flush_work_sync(&acb->arcmsr_do_message_isr_bh);
+	arcmsr_stop_adapter_bgrb(acb);
+	arcmsr_flush_adapter_cache(acb);
+}
+
+static int arcmsr_module_init(void)
+{
+	int error = 0;
+	error = pci_register_driver(&arcmsr_pci_driver);
+	return error;
+}
+
+static void arcmsr_module_exit(void)
+{
+	pci_unregister_driver(&arcmsr_pci_driver);
+}
+module_init(arcmsr_module_init);
+module_exit(arcmsr_module_exit);
+
+static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb,
+						u32 intmask_org)
+{
+	u32 mask;
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		mask = intmask_org & ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE |
+			     ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE|
+			     ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE);
+		writel(mask, &reg->outbound_intmask);
+		acb->outbound_int_enable = ~(intmask_org & mask) & 0x000000ff;
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		mask = intmask_org | (ARCMSR_IOP2DRV_DATA_WRITE_OK |
+			ARCMSR_IOP2DRV_DATA_READ_OK |
+			ARCMSR_IOP2DRV_CDB_DONE |
+			ARCMSR_IOP2DRV_MESSAGE_CMD_DONE);
+		writel(mask, reg->iop2drv_doorbell_mask);
+		acb->outbound_int_enable = (intmask_org | mask) & 0x0000000f;
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C *reg = acb->pmuC;
+		mask = ~(ARCMSR_HBCMU_UTILITY_A_ISR_MASK | ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR_MASK|ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR_MASK);
+		writel(intmask_org & mask, &reg->host_int_mask);
+		acb->outbound_int_enable = ~(intmask_org & mask) & 0x0000000f;
+		}
+	}
+}
+
+static int arcmsr_build_ccb(struct AdapterControlBlock *acb,
+	struct CommandControlBlock *ccb, struct scsi_cmnd *pcmd)
+{
+	struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
+	int8_t *psge = (int8_t *)&arcmsr_cdb->u;
+	__le32 address_lo, address_hi;
+	int arccdbsize = 0x30;
+	__le32 length = 0;
+	int i;
+	struct scatterlist *sg;
+	int nseg;
+	ccb->pcmd = pcmd;
+	memset(arcmsr_cdb, 0, sizeof(struct ARCMSR_CDB));
+	arcmsr_cdb->TargetID = pcmd->device->id;
+	arcmsr_cdb->LUN = pcmd->device->lun;
+	arcmsr_cdb->Function = 1;
+	arcmsr_cdb->Context = 0;
+	memcpy(arcmsr_cdb->Cdb, pcmd->cmnd, pcmd->cmd_len);
+
+	nseg = scsi_dma_map(pcmd);
+	if (unlikely(nseg > acb->host->sg_tablesize || nseg < 0))
+		return FAILED;
+	scsi_for_each_sg(pcmd, sg, nseg, i) {
+		/* Get the physical address of the current data pointer */
+		length = cpu_to_le32(sg_dma_len(sg));
+		address_lo = cpu_to_le32(dma_addr_lo32(sg_dma_address(sg)));
+		address_hi = cpu_to_le32(dma_addr_hi32(sg_dma_address(sg)));
+		if (address_hi == 0) {
+			struct SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
+
+			pdma_sg->address = address_lo;
+			pdma_sg->length = length;
+			psge += sizeof (struct SG32ENTRY);
+			arccdbsize += sizeof (struct SG32ENTRY);
+		} else {
+			struct SG64ENTRY *pdma_sg = (struct SG64ENTRY *)psge;
+
+			pdma_sg->addresshigh = address_hi;
+			pdma_sg->address = address_lo;
+			pdma_sg->length = length|cpu_to_le32(IS_SG64_ADDR);
+			psge += sizeof (struct SG64ENTRY);
+			arccdbsize += sizeof (struct SG64ENTRY);
+		}
+	}
+	arcmsr_cdb->sgcount = (uint8_t)nseg;
+	arcmsr_cdb->DataLength = scsi_bufflen(pcmd);
+	arcmsr_cdb->msgPages = arccdbsize/0x100 + (arccdbsize % 0x100 ? 1 : 0);
+	if ( arccdbsize > 256)
+		arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_SGL_BSIZE;
+	if (pcmd->sc_data_direction == DMA_TO_DEVICE)
+		arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_WRITE;
+	ccb->arc_cdb_size = arccdbsize;
+	return SUCCESS;
+}
+
+static void arcmsr_post_ccb(struct AdapterControlBlock *acb, struct CommandControlBlock *ccb)
+{
+	uint32_t cdb_phyaddr_pattern = ccb->cdb_phyaddr_pattern;
+	struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
+	atomic_inc(&acb->ccboutstandingcount);
+	ccb->startdone = ARCMSR_CCB_START;
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+
+		if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE)
+			writel(cdb_phyaddr_pattern | ARCMSR_CCBPOST_FLAG_SGL_BSIZE,
+			&reg->inbound_queueport);
+		else {
+				writel(cdb_phyaddr_pattern, &reg->inbound_queueport);
+		}
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		uint32_t ending_index, index = reg->postq_index;
+
+		ending_index = ((index + 1) % ARCMSR_MAX_HBB_POSTQUEUE);
+		writel(0, &reg->post_qbuffer[ending_index]);
+		if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE) {
+			writel(cdb_phyaddr_pattern | ARCMSR_CCBPOST_FLAG_SGL_BSIZE,\
+						 &reg->post_qbuffer[index]);
+		} else {
+			writel(cdb_phyaddr_pattern, &reg->post_qbuffer[index]);
+		}
+		index++;
+		index %= ARCMSR_MAX_HBB_POSTQUEUE;/*if last index number set it to 0 */
+		reg->postq_index = index;
+		writel(ARCMSR_DRV2IOP_CDB_POSTED, reg->drv2iop_doorbell);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C *phbcmu = (struct MessageUnit_C *)acb->pmuC;
+		uint32_t ccb_post_stamp, arc_cdb_size;
+
+		arc_cdb_size = (ccb->arc_cdb_size > 0x300) ? 0x300 : ccb->arc_cdb_size;
+		ccb_post_stamp = (cdb_phyaddr_pattern | ((arc_cdb_size - 1) >> 6) | 1);
+		if (acb->cdb_phyaddr_hi32) {
+			writel(acb->cdb_phyaddr_hi32, &phbcmu->inbound_queueport_high);
+			writel(ccb_post_stamp, &phbcmu->inbound_queueport_low);
+		} else {
+			writel(ccb_post_stamp, &phbcmu->inbound_queueport_low);
+		}
+		}
+	}
+}
+
+static void arcmsr_stop_hba_bgrb(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
+	writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, &reg->inbound_msgaddr0);
+	if (!arcmsr_hba_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE
+			"arcmsr%d: wait 'stop adapter background rebulid' timeout \n"
+			, acb->host->host_no);
+	}
+}
+
+static void arcmsr_stop_hbb_bgrb(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B *reg = acb->pmuB;
+	acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
+	writel(ARCMSR_MESSAGE_STOP_BGRB, reg->drv2iop_doorbell);
+
+	if (!arcmsr_hbb_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE
+			"arcmsr%d: wait 'stop adapter background rebulid' timeout \n"
+			, acb->host->host_no);
+	}
+}
+
+static void arcmsr_stop_hbc_bgrb(struct AdapterControlBlock *pACB)
+{
+	struct MessageUnit_C *reg = (struct MessageUnit_C *)pACB->pmuC;
+	pACB->acb_flags &= ~ACB_F_MSG_START_BGRB;
+	writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, &reg->inbound_msgaddr0);
+	writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
+	if (!arcmsr_hbc_wait_msgint_ready(pACB)) {
+		printk(KERN_NOTICE
+			"arcmsr%d: wait 'stop adapter background rebulid' timeout \n"
+			, pACB->host->host_no);
+	}
+	return;
+}
+static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A: {
+		arcmsr_stop_hba_bgrb(acb);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		arcmsr_stop_hbb_bgrb(acb);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		arcmsr_stop_hbc_bgrb(acb);
+		}
+	}
+}
+
+static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb)
+{
+	dma_free_coherent(&acb->pdev->dev, acb->uncache_size, acb->dma_coherent, acb->dma_coherent_handle);
+}
+
+void arcmsr_iop_message_read(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C __iomem *reg = acb->pmuC;
+		writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, &reg->inbound_doorbell);
+		}
+	}
+}
+
+static void arcmsr_iop_message_wrote(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		/*
+		** push inbound doorbell tell iop, driver data write ok
+		** and wait reply on next hwinterrupt for next Qbuffer post
+		*/
+		writel(ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK, &reg->inbound_doorbell);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		/*
+		** push inbound doorbell tell iop, driver data write ok
+		** and wait reply on next hwinterrupt for next Qbuffer post
+		*/
+		writel(ARCMSR_DRV2IOP_DATA_WRITE_OK, reg->drv2iop_doorbell);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C __iomem *reg = acb->pmuC;
+		/*
+		** push inbound doorbell tell iop, driver data write ok
+		** and wait reply on next hwinterrupt for next Qbuffer post
+		*/
+		writel(ARCMSR_HBCMU_DRV2IOP_DATA_WRITE_OK, &reg->inbound_doorbell);
+		}
+		break;
+	}
+}
+
+struct QBUFFER __iomem *arcmsr_get_iop_rqbuffer(struct AdapterControlBlock *acb)
+{
+	struct QBUFFER __iomem *qbuffer = NULL;
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		qbuffer = (struct QBUFFER __iomem *)&reg->message_rbuffer;
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		qbuffer = (struct QBUFFER __iomem *)reg->message_rbuffer;
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C *phbcmu = (struct MessageUnit_C *)acb->pmuC;
+		qbuffer = (struct QBUFFER __iomem *)&phbcmu->message_rbuffer;
+		}
+	}
+	return qbuffer;
+}
+
+static struct QBUFFER __iomem *arcmsr_get_iop_wqbuffer(struct AdapterControlBlock *acb)
+{
+	struct QBUFFER __iomem *pqbuffer = NULL;
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		pqbuffer = (struct QBUFFER __iomem *) &reg->message_wbuffer;
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B  *reg = acb->pmuB;
+		pqbuffer = (struct QBUFFER __iomem *)reg->message_wbuffer;
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C *reg = (struct MessageUnit_C *)acb->pmuC;
+		pqbuffer = (struct QBUFFER __iomem *)&reg->message_wbuffer;
+	}
+
+	}
+	return pqbuffer;
+}
+
+static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
+{
+	struct QBUFFER __iomem *prbuffer;
+	struct QBUFFER *pQbuffer;
+	uint8_t __iomem *iop_data;
+	int32_t my_empty_len, iop_len, rqbuf_firstindex, rqbuf_lastindex;
+	rqbuf_lastindex = acb->rqbuf_lastindex;
+	rqbuf_firstindex = acb->rqbuf_firstindex;
+	prbuffer = arcmsr_get_iop_rqbuffer(acb);
+	iop_data = (uint8_t __iomem *)prbuffer->data;
+	iop_len = prbuffer->data_len;
+	my_empty_len = (rqbuf_firstindex - rqbuf_lastindex - 1) & (ARCMSR_MAX_QBUFFER - 1);
+
+	if (my_empty_len >= iop_len)
+	{
+		while (iop_len > 0) {
+			pQbuffer = (struct QBUFFER *)&acb->rqbuffer[rqbuf_lastindex];
+			memcpy(pQbuffer, iop_data, 1);
+			rqbuf_lastindex++;
+			rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
+			iop_data++;
+			iop_len--;
+		}
+		acb->rqbuf_lastindex = rqbuf_lastindex;
+		arcmsr_iop_message_read(acb);
+	}
+
+	else {
+		acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
+	}
+}
+
+static void arcmsr_iop2drv_data_read_handle(struct AdapterControlBlock *acb)
+{
+	acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
+	if (acb->wqbuf_firstindex != acb->wqbuf_lastindex) {
+		uint8_t *pQbuffer;
+		struct QBUFFER __iomem *pwbuffer;
+		uint8_t __iomem *iop_data;
+		int32_t allxfer_len = 0;
+
+		acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
+		pwbuffer = arcmsr_get_iop_wqbuffer(acb);
+		iop_data = (uint8_t __iomem *)pwbuffer->data;
+
+		while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex) && \
+							(allxfer_len < 124)) {
+			pQbuffer = &acb->wqbuffer[acb->wqbuf_firstindex];
+			memcpy(iop_data, pQbuffer, 1);
+			acb->wqbuf_firstindex++;
+			acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
+			iop_data++;
+			allxfer_len++;
+		}
+		pwbuffer->data_len = allxfer_len;
+
+		arcmsr_iop_message_wrote(acb);
+	}
+
+	if (acb->wqbuf_firstindex == acb->wqbuf_lastindex) {
+		acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
+	}
+}
+
+static void arcmsr_hba_doorbell_isr(struct AdapterControlBlock *acb)
+{
+	uint32_t outbound_doorbell;
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	outbound_doorbell = readl(&reg->outbound_doorbell);
+	writel(outbound_doorbell, &reg->outbound_doorbell);
+	if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK) {
+		arcmsr_iop2drv_data_wrote_handle(acb);
+	}
+
+	if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_READ_OK) {
+		arcmsr_iop2drv_data_read_handle(acb);
+	}
+}
+static void arcmsr_hbc_doorbell_isr(struct AdapterControlBlock *pACB)
+{
+	uint32_t outbound_doorbell;
+	struct MessageUnit_C *reg = (struct MessageUnit_C *)pACB->pmuC;
+	/*
+	*******************************************************************
+	**  Maybe here we need to check wrqbuffer_lock is lock or not
+	**  DOORBELL: din! don!
+	**  check if there are any mail need to pack from firmware
+	*******************************************************************
+	*/
+	outbound_doorbell = readl(&reg->outbound_doorbell);
+	writel(outbound_doorbell, &reg->outbound_doorbell_clear);/*clear interrupt*/
+	if (outbound_doorbell & ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK) {
+		arcmsr_iop2drv_data_wrote_handle(pACB);
+	}
+	if (outbound_doorbell & ARCMSR_HBCMU_IOP2DRV_DATA_READ_OK) {
+		arcmsr_iop2drv_data_read_handle(pACB);
+	}
+	if (outbound_doorbell & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
+		arcmsr_hbc_message_isr(pACB);    /* messenger of "driver to iop commands" */
+	}
+	return;
+}
+static void arcmsr_hba_postqueue_isr(struct AdapterControlBlock *acb)
+{
+	uint32_t flag_ccb;
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	struct ARCMSR_CDB *pARCMSR_CDB;
+	struct CommandControlBlock *pCCB;
+	bool error;
+	while ((flag_ccb = readl(&reg->outbound_queueport)) != 0xFFFFFFFF) {
+		pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));/*frame must be 32 bytes aligned*/
+		pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
+		error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
+		arcmsr_drain_donequeue(acb, pCCB, error);
+	}
+}
+static void arcmsr_hbb_postqueue_isr(struct AdapterControlBlock *acb)
+{
+	uint32_t index;
+	uint32_t flag_ccb;
+	struct MessageUnit_B *reg = acb->pmuB;
+	struct ARCMSR_CDB *pARCMSR_CDB;
+	struct CommandControlBlock *pCCB;
+	bool error;
+	index = reg->doneq_index;
+	while ((flag_ccb = readl(&reg->done_qbuffer[index])) != 0) {
+		writel(0, &reg->done_qbuffer[index]);
+		pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset+(flag_ccb << 5));/*frame must be 32 bytes aligned*/
+		pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
+		error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
+		arcmsr_drain_donequeue(acb, pCCB, error);
+		index++;
+		index %= ARCMSR_MAX_HBB_POSTQUEUE;
+		reg->doneq_index = index;
+	}
+}
+
+static void arcmsr_hbc_postqueue_isr(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_C *phbcmu;
+	struct ARCMSR_CDB *arcmsr_cdb;
+	struct CommandControlBlock *ccb;
+	uint32_t flag_ccb, ccb_cdb_phy, throttling = 0;
+	int error;
+
+	phbcmu = (struct MessageUnit_C *)acb->pmuC;
+	/* areca cdb command done */
+	/* Use correct offset and size for syncing */
+
+	while (readl(&phbcmu->host_int_status) &
+	ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR){
+	/* check if command done with no error*/
+	flag_ccb = readl(&phbcmu->outbound_queueport_low);
+	ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);/*frame must be 32 bytes aligned*/
+	arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset + ccb_cdb_phy);
+	ccb = container_of(arcmsr_cdb, struct CommandControlBlock, arcmsr_cdb);
+	error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1) ? true : false;
+	/* check if command done with no error */
+	arcmsr_drain_donequeue(acb, ccb, error);
+	if (throttling == ARCMSR_HBC_ISR_THROTTLING_LEVEL) {
+		writel(ARCMSR_HBCMU_DRV2IOP_POSTQUEUE_THROTTLING, &phbcmu->inbound_doorbell);
+		break;
+	}
+	throttling++;
+	}
+}
+/*
+**********************************************************************************
+** Handle a message interrupt
+**
+** The only message interrupt we expect is in response to a query for the current adapter config.  
+** We want this in order to compare the drivemap so that we can detect newly-attached drives.
+**********************************************************************************
+*/
+static void arcmsr_hba_message_isr(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A *reg  = acb->pmuA;
+	/*clear interrupt and message state*/
+	writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT, &reg->outbound_intstatus);
+	schedule_work(&acb->arcmsr_do_message_isr_bh);
+}
+static void arcmsr_hbb_message_isr(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B *reg  = acb->pmuB;
+
+	/*clear interrupt and message state*/
+	writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
+	schedule_work(&acb->arcmsr_do_message_isr_bh);
+}
+/*
+**********************************************************************************
+** Handle a message interrupt
+**
+** The only message interrupt we expect is in response to a query for the
+** current adapter config.
+** We want this in order to compare the drivemap so that we can detect newly-attached drives.
+**********************************************************************************
+*/
+static void arcmsr_hbc_message_isr(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_C *reg  = acb->pmuC;
+	/*clear interrupt and message state*/
+	writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &reg->outbound_doorbell_clear);
+	schedule_work(&acb->arcmsr_do_message_isr_bh);
+}
+
+static int arcmsr_handle_hba_isr(struct AdapterControlBlock *acb)
+{
+	uint32_t outbound_intstatus;
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	outbound_intstatus = readl(&reg->outbound_intstatus) &
+		acb->outbound_int_enable;
+	if (!(outbound_intstatus & ARCMSR_MU_OUTBOUND_HANDLE_INT))	{
+		return 1;
+	}
+	writel(outbound_intstatus, &reg->outbound_intstatus);
+	if (outbound_intstatus & ARCMSR_MU_OUTBOUND_DOORBELL_INT)	{
+		arcmsr_hba_doorbell_isr(acb);
+	}
+	if (outbound_intstatus & ARCMSR_MU_OUTBOUND_POSTQUEUE_INT) {
+		arcmsr_hba_postqueue_isr(acb);
+	}
+	if(outbound_intstatus & ARCMSR_MU_OUTBOUND_MESSAGE0_INT) 	{
+		/* messenger of "driver to iop commands" */
+		arcmsr_hba_message_isr(acb);
+	}
+	return 0;
+}
+
+static int arcmsr_handle_hbb_isr(struct AdapterControlBlock *acb)
+{
+	uint32_t outbound_doorbell;
+	struct MessageUnit_B *reg = acb->pmuB;
+	outbound_doorbell = readl(reg->iop2drv_doorbell) &
+				acb->outbound_int_enable;
+	if (!outbound_doorbell)
+		return 1;
+
+	writel(~outbound_doorbell, reg->iop2drv_doorbell);
+	/*in case the last action of doorbell interrupt clearance is cached,
+	this action can push HW to write down the clear bit*/
+	readl(reg->iop2drv_doorbell);
+	writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT, reg->drv2iop_doorbell);
+	if (outbound_doorbell & ARCMSR_IOP2DRV_DATA_WRITE_OK) {
+		arcmsr_iop2drv_data_wrote_handle(acb);
+	}
+	if (outbound_doorbell & ARCMSR_IOP2DRV_DATA_READ_OK) {
+		arcmsr_iop2drv_data_read_handle(acb);
+	}
+	if (outbound_doorbell & ARCMSR_IOP2DRV_CDB_DONE) {
+		arcmsr_hbb_postqueue_isr(acb);
+	}
+	if(outbound_doorbell & ARCMSR_IOP2DRV_MESSAGE_CMD_DONE) {
+		/* messenger of "driver to iop commands" */
+		arcmsr_hbb_message_isr(acb);
+	}
+	return 0;
+}
+
+static int arcmsr_handle_hbc_isr(struct AdapterControlBlock *pACB)
+{
+	uint32_t host_interrupt_status;
+	struct MessageUnit_C *phbcmu = (struct MessageUnit_C *)pACB->pmuC;
+	/*
+	*********************************************
+	**   check outbound intstatus
+	*********************************************
+	*/
+	host_interrupt_status = readl(&phbcmu->host_int_status);
+	if (!host_interrupt_status) {
+		/*it must be share irq*/
+		return 1;
+	}
+	/* MU ioctl transfer doorbell interrupts*/
+	if (host_interrupt_status & ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR) {
+		arcmsr_hbc_doorbell_isr(pACB);   /* messenger of "ioctl message read write" */
+	}
+	/* MU post queue interrupts*/
+	if (host_interrupt_status & ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR) {
+		arcmsr_hbc_postqueue_isr(pACB);  /* messenger of "scsi commands" */
+	}
+	return 0;
+}
+static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A: {
+		if (arcmsr_handle_hba_isr(acb)) {
+			return IRQ_NONE;
+		}
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		if (arcmsr_handle_hbb_isr(acb)) {
+			return IRQ_NONE;
+		}
+		}
+		break;
+	 case ACB_ADAPTER_TYPE_C: {
+		if (arcmsr_handle_hbc_isr(acb)) {
+			return IRQ_NONE;
+		}
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+static void arcmsr_iop_parking(struct AdapterControlBlock *acb)
+{
+	if (acb) {
+		/* stop adapter background rebuild */
+		if (acb->acb_flags & ACB_F_MSG_START_BGRB) {
+			uint32_t intmask_org;
+			acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
+			intmask_org = arcmsr_disable_outbound_ints(acb);
+			arcmsr_stop_adapter_bgrb(acb);
+			arcmsr_flush_adapter_cache(acb);
+			arcmsr_enable_outbound_ints(acb, intmask_org);
+		}
+	}
+}
+
+void arcmsr_post_ioctldata2iop(struct AdapterControlBlock *acb)
+{
+	int32_t wqbuf_firstindex, wqbuf_lastindex;
+	uint8_t *pQbuffer;
+	struct QBUFFER __iomem *pwbuffer;
+	uint8_t __iomem *iop_data;
+	int32_t allxfer_len = 0;
+	pwbuffer = arcmsr_get_iop_wqbuffer(acb);
+	iop_data = (uint8_t __iomem *)pwbuffer->data;
+	if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
+		acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
+		wqbuf_firstindex = acb->wqbuf_firstindex;
+		wqbuf_lastindex = acb->wqbuf_lastindex;
+		while ((wqbuf_firstindex != wqbuf_lastindex) && (allxfer_len < 124)) {
+			pQbuffer = &acb->wqbuffer[wqbuf_firstindex];
+			memcpy(iop_data, pQbuffer, 1);
+			wqbuf_firstindex++;
+			wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
+			iop_data++;
+			allxfer_len++;
+		}
+		acb->wqbuf_firstindex = wqbuf_firstindex;
+		pwbuffer->data_len = allxfer_len;
+		arcmsr_iop_message_wrote(acb);
+	}
+}
+
+static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
+					struct scsi_cmnd *cmd)
+{
+	struct CMD_MESSAGE_FIELD *pcmdmessagefld;
+	int retvalue = 0, transfer_len = 0;
+	char *buffer;
+	struct scatterlist *sg;
+	uint32_t controlcode = (uint32_t ) cmd->cmnd[5] << 24 |
+						(uint32_t ) cmd->cmnd[6] << 16 |
+						(uint32_t ) cmd->cmnd[7] << 8  |
+						(uint32_t ) cmd->cmnd[8];
+						/* 4 bytes: Areca io control code */
+	sg = scsi_sglist(cmd);
+	buffer = kmap_atomic(sg_page(sg)) + sg->offset;
+	if (scsi_sg_count(cmd) > 1) {
+		retvalue = ARCMSR_MESSAGE_FAIL;
+		goto message_out;
+	}
+	transfer_len += sg->length;
+
+	if (transfer_len > sizeof(struct CMD_MESSAGE_FIELD)) {
+		retvalue = ARCMSR_MESSAGE_FAIL;
+		goto message_out;
+	}
+	pcmdmessagefld = (struct CMD_MESSAGE_FIELD *) buffer;
+	switch(controlcode) {
+
+	case ARCMSR_MESSAGE_READ_RQBUFFER: {
+		unsigned char *ver_addr;
+		uint8_t *pQbuffer, *ptmpQbuffer;
+		int32_t allxfer_len = 0;
+
+		ver_addr = kmalloc(1032, GFP_ATOMIC);
+		if (!ver_addr) {
+			retvalue = ARCMSR_MESSAGE_FAIL;
+			goto message_out;
+		}
+				
+		ptmpQbuffer = ver_addr;
+		while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
+			&& (allxfer_len < 1031)) {
+			pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
+			memcpy(ptmpQbuffer, pQbuffer, 1);
+			acb->rqbuf_firstindex++;
+			acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
+			ptmpQbuffer++;
+			allxfer_len++;
+		}
+		if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
+
+			struct QBUFFER __iomem *prbuffer;
+			uint8_t __iomem *iop_data;
+			int32_t iop_len;
+
+			acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
+			prbuffer = arcmsr_get_iop_rqbuffer(acb);
+			iop_data = prbuffer->data;
+			iop_len = readl(&prbuffer->data_len);
+			while (iop_len > 0) {
+				acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
+				acb->rqbuf_lastindex++;
+				acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
+				iop_data++;
+				iop_len--;
+			}
+			arcmsr_iop_message_read(acb);
+		}
+		memcpy(pcmdmessagefld->messagedatabuffer, ver_addr, allxfer_len);
+		pcmdmessagefld->cmdmessage.Length = allxfer_len;
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}else{
+			pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
+		}
+		kfree(ver_addr);
+		}
+		break;
+
+	case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
+		unsigned char *ver_addr;
+		int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
+		uint8_t *pQbuffer, *ptmpuserbuffer;
+
+		ver_addr = kmalloc(1032, GFP_ATOMIC);
+		if (!ver_addr) {
+			retvalue = ARCMSR_MESSAGE_FAIL;
+			goto message_out;
+		}
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode = 
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}else{
+			pcmdmessagefld->cmdmessage.ReturnCode = 
+			ARCMSR_MESSAGE_RETURNCODE_OK;
+		}
+		ptmpuserbuffer = ver_addr;
+		user_len = pcmdmessagefld->cmdmessage.Length;
+		memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len);
+		wqbuf_lastindex = acb->wqbuf_lastindex;
+		wqbuf_firstindex = acb->wqbuf_firstindex;
+		if (wqbuf_lastindex != wqbuf_firstindex) {
+			struct SENSE_DATA *sensebuffer =
+				(struct SENSE_DATA *)cmd->sense_buffer;
+			arcmsr_post_ioctldata2iop(acb);
+			/* has error report sensedata */
+			sensebuffer->ErrorCode = 0x70;
+			sensebuffer->SenseKey = ILLEGAL_REQUEST;
+			sensebuffer->AdditionalSenseLength = 0x0A;
+			sensebuffer->AdditionalSenseCode = 0x20;
+			sensebuffer->Valid = 1;
+			retvalue = ARCMSR_MESSAGE_FAIL;
+		} else {
+			my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
+				&(ARCMSR_MAX_QBUFFER - 1);
+			if (my_empty_len >= user_len) {
+				while (user_len > 0) {
+					pQbuffer =
+					&acb->wqbuffer[acb->wqbuf_lastindex];
+					memcpy(pQbuffer, ptmpuserbuffer, 1);
+					acb->wqbuf_lastindex++;
+					acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
+					ptmpuserbuffer++;
+					user_len--;
+				}
+				if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
+					acb->acb_flags &=
+						~ACB_F_MESSAGE_WQBUFFER_CLEARED;
+					arcmsr_post_ioctldata2iop(acb);
+				}
+			} else {
+				/* has error report sensedata */
+				struct SENSE_DATA *sensebuffer =
+					(struct SENSE_DATA *)cmd->sense_buffer;
+				sensebuffer->ErrorCode = 0x70;
+				sensebuffer->SenseKey = ILLEGAL_REQUEST;
+				sensebuffer->AdditionalSenseLength = 0x0A;
+				sensebuffer->AdditionalSenseCode = 0x20;
+				sensebuffer->Valid = 1;
+				retvalue = ARCMSR_MESSAGE_FAIL;
+			}
+			}
+			kfree(ver_addr);
+		}
+		break;
+
+	case ARCMSR_MESSAGE_CLEAR_RQBUFFER: {
+		uint8_t *pQbuffer = acb->rqbuffer;
+		if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
+			acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
+			arcmsr_iop_message_read(acb);
+		}
+		acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
+		acb->rqbuf_firstindex = 0;
+		acb->rqbuf_lastindex = 0;
+		memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}else{
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_OK;
+		}
+		}
+		break;
+
+	case ARCMSR_MESSAGE_CLEAR_WQBUFFER: {
+		uint8_t *pQbuffer = acb->wqbuffer;
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}else{
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_OK;
+		}
+
+		if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
+			acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
+			arcmsr_iop_message_read(acb);
+		}
+		acb->acb_flags |=
+			(ACB_F_MESSAGE_WQBUFFER_CLEARED |
+				ACB_F_MESSAGE_WQBUFFER_READED);
+		acb->wqbuf_firstindex = 0;
+		acb->wqbuf_lastindex = 0;
+		memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
+		}
+		break;
+
+	case ARCMSR_MESSAGE_CLEAR_ALLQBUFFER: {
+		uint8_t *pQbuffer;
+
+		if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
+			acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
+			arcmsr_iop_message_read(acb);
+		}
+		acb->acb_flags |=
+			(ACB_F_MESSAGE_WQBUFFER_CLEARED
+			| ACB_F_MESSAGE_RQBUFFER_CLEARED
+			| ACB_F_MESSAGE_WQBUFFER_READED);
+		acb->rqbuf_firstindex = 0;
+		acb->rqbuf_lastindex = 0;
+		acb->wqbuf_firstindex = 0;
+		acb->wqbuf_lastindex = 0;
+		pQbuffer = acb->rqbuffer;
+		memset(pQbuffer, 0, sizeof(struct QBUFFER));
+		pQbuffer = acb->wqbuffer;
+		memset(pQbuffer, 0, sizeof(struct QBUFFER));
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}else{
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_OK;
+		}
+		}
+		break;
+
+	case ARCMSR_MESSAGE_RETURN_CODE_3F: {
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}else{
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_3F;
+		}
+		break;
+		}
+	case ARCMSR_MESSAGE_SAY_HELLO: {
+		int8_t *hello_string = "Hello! I am ARCMSR";
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}else{
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_OK;
+		}
+		memcpy(pcmdmessagefld->messagedatabuffer, hello_string
+			, (int16_t)strlen(hello_string));
+		}
+		break;
+
+	case ARCMSR_MESSAGE_SAY_GOODBYE:
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}
+		arcmsr_iop_parking(acb);
+		break;
+
+	case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE:
+		if(acb->fw_flag == FW_DEADLOCK) {
+			pcmdmessagefld->cmdmessage.ReturnCode =
+			ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
+		}
+		arcmsr_flush_adapter_cache(acb);
+		break;
+
+	default:
+		retvalue = ARCMSR_MESSAGE_FAIL;
+	}
+	message_out:
+	sg = scsi_sglist(cmd);
+	kunmap_atomic(buffer - sg->offset);
+	return retvalue;
+}
+
+static struct CommandControlBlock *arcmsr_get_freeccb(struct AdapterControlBlock *acb)
+{
+	struct list_head *head = &acb->ccb_free_list;
+	struct CommandControlBlock *ccb = NULL;
+	unsigned long flags;
+	spin_lock_irqsave(&acb->ccblist_lock, flags);
+	if (!list_empty(head)) {
+		ccb = list_entry(head->next, struct CommandControlBlock, list);
+		list_del_init(&ccb->list);
+	}else{
+		spin_unlock_irqrestore(&acb->ccblist_lock, flags);
+		return 0;
+	}
+	spin_unlock_irqrestore(&acb->ccblist_lock, flags);
+	return ccb;
+}
+
+static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb,
+		struct scsi_cmnd *cmd)
+{
+	switch (cmd->cmnd[0]) {
+	case INQUIRY: {
+		unsigned char inqdata[36];
+		char *buffer;
+		struct scatterlist *sg;
+
+		if (cmd->device->lun) {
+			cmd->result = (DID_TIME_OUT << 16);
+			cmd->scsi_done(cmd);
+			return;
+		}
+		inqdata[0] = TYPE_PROCESSOR;
+		/* Periph Qualifier & Periph Dev Type */
+		inqdata[1] = 0;
+		/* rem media bit & Dev Type Modifier */
+		inqdata[2] = 0;
+		/* ISO, ECMA, & ANSI versions */
+		inqdata[4] = 31;
+		/* length of additional data */
+		strncpy(&inqdata[8], "Areca   ", 8);
+		/* Vendor Identification */
+		strncpy(&inqdata[16], "RAID controller ", 16);
+		/* Product Identification */
+		strncpy(&inqdata[32], "R001", 4); /* Product Revision */
+
+		sg = scsi_sglist(cmd);
+		buffer = kmap_atomic(sg_page(sg)) + sg->offset;
+
+		memcpy(buffer, inqdata, sizeof(inqdata));
+		sg = scsi_sglist(cmd);
+		kunmap_atomic(buffer - sg->offset);
+
+		cmd->scsi_done(cmd);
+	}
+	break;
+	case WRITE_BUFFER:
+	case READ_BUFFER: {
+		if (arcmsr_iop_message_xfer(acb, cmd))
+			cmd->result = (DID_ERROR << 16);
+		cmd->scsi_done(cmd);
+	}
+	break;
+	default:
+		cmd->scsi_done(cmd);
+	}
+}
+
+static int arcmsr_queue_command_lck(struct scsi_cmnd *cmd,
+	void (* done)(struct scsi_cmnd *))
+{
+	struct Scsi_Host *host = cmd->device->host;
+	struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
+	struct CommandControlBlock *ccb;
+	int target = cmd->device->id;
+	int lun = cmd->device->lun;
+	uint8_t scsicmd = cmd->cmnd[0];
+	cmd->scsi_done = done;
+	cmd->host_scribble = NULL;
+	cmd->result = 0;
+	if ((scsicmd == SYNCHRONIZE_CACHE) ||(scsicmd == SEND_DIAGNOSTIC)){
+		if(acb->devstate[target][lun] == ARECA_RAID_GONE) {
+    			cmd->result = (DID_NO_CONNECT << 16);
+		}
+		cmd->scsi_done(cmd);
+		return 0;
+	}
+	if (target == 16) {
+		/* virtual device for iop message transfer */
+		arcmsr_handle_virtual_command(acb, cmd);
+		return 0;
+	}
+	if (atomic_read(&acb->ccboutstandingcount) >=
+			ARCMSR_MAX_OUTSTANDING_CMD)
+		return SCSI_MLQUEUE_HOST_BUSY;
+	ccb = arcmsr_get_freeccb(acb);
+	if (!ccb)
+		return SCSI_MLQUEUE_HOST_BUSY;
+	if (arcmsr_build_ccb( acb, ccb, cmd ) == FAILED) {
+		cmd->result = (DID_ERROR << 16) | (RESERVATION_CONFLICT << 1);
+		cmd->scsi_done(cmd);
+		return 0;
+	}
+	arcmsr_post_ccb(acb, ccb);
+	return 0;
+}
+
+static DEF_SCSI_QCMD(arcmsr_queue_command)
+
+static bool arcmsr_get_hba_config(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	char *acb_firm_model = acb->firm_model;
+	char *acb_firm_version = acb->firm_version;
+	char *acb_device_map = acb->device_map;
+	char __iomem *iop_firm_model = (char __iomem *)(&reg->message_rwbuffer[15]);
+	char __iomem *iop_firm_version = (char __iomem *)(&reg->message_rwbuffer[17]);
+	char __iomem *iop_device_map = (char __iomem *)(&reg->message_rwbuffer[21]);
+	int count;
+	writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
+	if (!arcmsr_hba_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
+			miscellaneous data' timeout \n", acb->host->host_no);
+		return false;
+	}
+	count = 8;
+	while (count){
+		*acb_firm_model = readb(iop_firm_model);
+		acb_firm_model++;
+		iop_firm_model++;
+		count--;
+	}
+
+	count = 16;
+	while (count){
+		*acb_firm_version = readb(iop_firm_version);
+		acb_firm_version++;
+		iop_firm_version++;
+		count--;
+	}
+
+	count=16;
+	while(count){
+		*acb_device_map = readb(iop_device_map);
+		acb_device_map++;
+		iop_device_map++;
+		count--;
+	}
+	printk(KERN_NOTICE "Areca RAID Controller%d: F/W %s & Model %s\n", 
+		acb->host->host_no,
+		acb->firm_version,
+		acb->firm_model);
+	acb->signature = readl(&reg->message_rwbuffer[0]);
+	acb->firm_request_len = readl(&reg->message_rwbuffer[1]);
+	acb->firm_numbers_queue = readl(&reg->message_rwbuffer[2]);
+	acb->firm_sdram_size = readl(&reg->message_rwbuffer[3]);
+	acb->firm_hd_channels = readl(&reg->message_rwbuffer[4]);
+	acb->firm_cfg_version = readl(&reg->message_rwbuffer[25]);  /*firm_cfg_version,25,100-103*/
+	return true;
+}
+static bool arcmsr_get_hbb_config(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B *reg = acb->pmuB;
+	struct pci_dev *pdev = acb->pdev;
+	void *dma_coherent;
+	dma_addr_t dma_coherent_handle;
+	char *acb_firm_model = acb->firm_model;
+	char *acb_firm_version = acb->firm_version;
+	char *acb_device_map = acb->device_map;
+	char __iomem *iop_firm_model;
+	/*firm_model,15,60-67*/
+	char __iomem *iop_firm_version;
+	/*firm_version,17,68-83*/
+	char __iomem *iop_device_map;
+	/*firm_version,21,84-99*/
+	int count;
+	dma_coherent = dma_alloc_coherent(&pdev->dev, sizeof(struct MessageUnit_B), &dma_coherent_handle, GFP_KERNEL);
+	if (!dma_coherent){
+		printk(KERN_NOTICE "arcmsr%d: dma_alloc_coherent got error for hbb mu\n", acb->host->host_no);
+		return false;
+	}
+	acb->dma_coherent_handle_hbb_mu = dma_coherent_handle;
+	reg = (struct MessageUnit_B *)dma_coherent;
+	acb->pmuB = reg;
+	reg->drv2iop_doorbell= (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL);
+	reg->drv2iop_doorbell_mask = (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL_MASK);
+	reg->iop2drv_doorbell = (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL);
+	reg->iop2drv_doorbell_mask = (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL_MASK);
+	reg->message_wbuffer = (uint32_t __iomem *)((unsigned long)acb->mem_base1 + ARCMSR_MESSAGE_WBUFFER);
+	reg->message_rbuffer =  (uint32_t __iomem *)((unsigned long)acb->mem_base1 + ARCMSR_MESSAGE_RBUFFER);
+	reg->message_rwbuffer = (uint32_t __iomem *)((unsigned long)acb->mem_base1 + ARCMSR_MESSAGE_RWBUFFER);
+	iop_firm_model = (char __iomem *)(&reg->message_rwbuffer[15]);	/*firm_model,15,60-67*/
+	iop_firm_version = (char __iomem *)(&reg->message_rwbuffer[17]);	/*firm_version,17,68-83*/
+	iop_device_map = (char __iomem *)(&reg->message_rwbuffer[21]);	/*firm_version,21,84-99*/
+
+	writel(ARCMSR_MESSAGE_GET_CONFIG, reg->drv2iop_doorbell);
+	if (!arcmsr_hbb_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
+			miscellaneous data' timeout \n", acb->host->host_no);
+		return false;
+	}
+	count = 8;
+	while (count){
+		*acb_firm_model = readb(iop_firm_model);
+		acb_firm_model++;
+		iop_firm_model++;
+		count--;
+	}
+	count = 16;
+	while (count){
+		*acb_firm_version = readb(iop_firm_version);
+		acb_firm_version++;
+		iop_firm_version++;
+		count--;
+	}
+
+	count = 16;
+	while(count){
+		*acb_device_map = readb(iop_device_map);
+		acb_device_map++;
+		iop_device_map++;
+		count--;
+	}
+	
+	printk(KERN_NOTICE "Areca RAID Controller%d: F/W %s & Model %s\n",
+		acb->host->host_no,
+		acb->firm_version,
+		acb->firm_model);
+
+	acb->signature = readl(&reg->message_rwbuffer[1]);
+	/*firm_signature,1,00-03*/
+	acb->firm_request_len = readl(&reg->message_rwbuffer[2]);
+	/*firm_request_len,1,04-07*/
+	acb->firm_numbers_queue = readl(&reg->message_rwbuffer[3]);
+	/*firm_numbers_queue,2,08-11*/
+	acb->firm_sdram_size = readl(&reg->message_rwbuffer[4]);
+	/*firm_sdram_size,3,12-15*/
+	acb->firm_hd_channels = readl(&reg->message_rwbuffer[5]);
+	/*firm_ide_channels,4,16-19*/
+	acb->firm_cfg_version = readl(&reg->message_rwbuffer[25]);  /*firm_cfg_version,25,100-103*/
+	/*firm_ide_channels,4,16-19*/
+	return true;
+}
+
+static bool arcmsr_get_hbc_config(struct AdapterControlBlock *pACB)
+{
+	uint32_t intmask_org, Index, firmware_state = 0;
+	struct MessageUnit_C *reg = pACB->pmuC;
+	char *acb_firm_model = pACB->firm_model;
+	char *acb_firm_version = pACB->firm_version;
+	char *iop_firm_model = (char *)(&reg->msgcode_rwbuffer[15]);    /*firm_model,15,60-67*/
+	char *iop_firm_version = (char *)(&reg->msgcode_rwbuffer[17]);  /*firm_version,17,68-83*/
+	int count;
+	/* disable all outbound interrupt */
+	intmask_org = readl(&reg->host_int_mask); /* disable outbound message0 int */
+	writel(intmask_org|ARCMSR_HBCMU_ALL_INTMASKENABLE, &reg->host_int_mask);
+	/* wait firmware ready */
+	do {
+		firmware_state = readl(&reg->outbound_msgaddr1);
+	} while ((firmware_state & ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK) == 0);
+	/* post "get config" instruction */
+	writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
+	writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
+	/* wait message ready */
+	for (Index = 0; Index < 2000; Index++) {
+		if (readl(&reg->outbound_doorbell) & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
+			writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &reg->outbound_doorbell_clear);/*clear interrupt*/
+			break;
+		}
+		udelay(10);
+	} /*max 1 seconds*/
+	if (Index >= 2000) {
+		printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
+			miscellaneous data' timeout \n", pACB->host->host_no);
+		return false;
+	}
+	count = 8;
+	while (count) {
+		*acb_firm_model = readb(iop_firm_model);
+		acb_firm_model++;
+		iop_firm_model++;
+		count--;
+	}
+	count = 16;
+	while (count) {
+		*acb_firm_version = readb(iop_firm_version);
+		acb_firm_version++;
+		iop_firm_version++;
+		count--;
+	}
+	printk(KERN_NOTICE "Areca RAID Controller%d: F/W %s & Model %s\n",
+		pACB->host->host_no,
+		pACB->firm_version,
+		pACB->firm_model);
+	pACB->firm_request_len = readl(&reg->msgcode_rwbuffer[1]);   /*firm_request_len,1,04-07*/
+	pACB->firm_numbers_queue = readl(&reg->msgcode_rwbuffer[2]); /*firm_numbers_queue,2,08-11*/
+	pACB->firm_sdram_size = readl(&reg->msgcode_rwbuffer[3]);    /*firm_sdram_size,3,12-15*/
+	pACB->firm_hd_channels = readl(&reg->msgcode_rwbuffer[4]);  /*firm_ide_channels,4,16-19*/
+	pACB->firm_cfg_version = readl(&reg->msgcode_rwbuffer[25]);  /*firm_cfg_version,25,100-103*/
+	/*all interrupt service will be enable at arcmsr_iop_init*/
+	return true;
+}
+static bool arcmsr_get_firmware_spec(struct AdapterControlBlock *acb)
+{
+	if (acb->adapter_type == ACB_ADAPTER_TYPE_A)
+		return arcmsr_get_hba_config(acb);
+	else if (acb->adapter_type == ACB_ADAPTER_TYPE_B)
+		return arcmsr_get_hbb_config(acb);
+	else
+		return arcmsr_get_hbc_config(acb);
+}
+
+static int arcmsr_polling_hba_ccbdone(struct AdapterControlBlock *acb,
+	struct CommandControlBlock *poll_ccb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	struct CommandControlBlock *ccb;
+	struct ARCMSR_CDB *arcmsr_cdb;
+	uint32_t flag_ccb, outbound_intstatus, poll_ccb_done = 0, poll_count = 0;
+	int rtn;
+	bool error;
+	polling_hba_ccb_retry:
+	poll_count++;
+	outbound_intstatus = readl(&reg->outbound_intstatus) & acb->outbound_int_enable;
+	writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
+	while (1) {
+		if ((flag_ccb = readl(&reg->outbound_queueport)) == 0xFFFFFFFF) {
+			if (poll_ccb_done){
+				rtn = SUCCESS;
+				break;
+			}else {
+				msleep(25);
+				if (poll_count > 100){
+					rtn = FAILED;
+					break;
+				}
+				goto polling_hba_ccb_retry;
+			}
+		}
+		arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));
+		ccb = container_of(arcmsr_cdb, struct CommandControlBlock, arcmsr_cdb);
+		poll_ccb_done = (ccb == poll_ccb) ? 1:0;
+		if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
+			if ((ccb->startdone == ARCMSR_CCB_ABORTED) || (ccb == poll_ccb)) {
+				printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
+					" poll command abort successfully \n"
+					, acb->host->host_no
+					, ccb->pcmd->device->id
+					, ccb->pcmd->device->lun
+					, ccb);
+				ccb->pcmd->result = DID_ABORT << 16;
+				arcmsr_ccb_complete(ccb);
+				continue;
+			}
+			printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
+				" command done ccb = '0x%p'"
+				"ccboutstandingcount = %d \n"
+				, acb->host->host_no
+				, ccb
+				, atomic_read(&acb->ccboutstandingcount));
+			continue;
+		}
+		error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
+		arcmsr_report_ccb_state(acb, ccb, error);
+	}
+	return rtn;
+}
+
+static int arcmsr_polling_hbb_ccbdone(struct AdapterControlBlock *acb,
+					struct CommandControlBlock *poll_ccb)
+{
+	struct MessageUnit_B *reg = acb->pmuB;
+	struct ARCMSR_CDB *arcmsr_cdb;
+	struct CommandControlBlock *ccb;
+	uint32_t flag_ccb, poll_ccb_done = 0, poll_count = 0;
+	int index, rtn;
+	bool error;
+	polling_hbb_ccb_retry:
+
+	poll_count++;
+	/* clear doorbell interrupt */
+	writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
+	while(1){
+		index = reg->doneq_index;
+		if ((flag_ccb = readl(&reg->done_qbuffer[index])) == 0) {
+			if (poll_ccb_done){
+				rtn = SUCCESS;
+				break;
+			}else {
+				msleep(25);
+				if (poll_count > 100){
+					rtn = FAILED;
+					break;
+				}
+				goto polling_hbb_ccb_retry;
+			}
+		}
+		writel(0, &reg->done_qbuffer[index]);
+		index++;
+		/*if last index number set it to 0 */
+		index %= ARCMSR_MAX_HBB_POSTQUEUE;
+		reg->doneq_index = index;
+		/* check if command done with no error*/
+		arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));
+		ccb = container_of(arcmsr_cdb, struct CommandControlBlock, arcmsr_cdb);
+		poll_ccb_done = (ccb == poll_ccb) ? 1:0;
+		if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
+			if ((ccb->startdone == ARCMSR_CCB_ABORTED) || (ccb == poll_ccb)) {
+				printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
+					" poll command abort successfully \n"
+					,acb->host->host_no
+					,ccb->pcmd->device->id
+					,ccb->pcmd->device->lun
+					,ccb);
+				ccb->pcmd->result = DID_ABORT << 16;
+				arcmsr_ccb_complete(ccb);
+				continue;
+			}
+			printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
+				" command done ccb = '0x%p'"
+				"ccboutstandingcount = %d \n"
+				, acb->host->host_no
+				, ccb
+				, atomic_read(&acb->ccboutstandingcount));
+			continue;
+		} 
+		error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
+		arcmsr_report_ccb_state(acb, ccb, error);
+	}
+	return rtn;
+}
+
+static int arcmsr_polling_hbc_ccbdone(struct AdapterControlBlock *acb, struct CommandControlBlock *poll_ccb)
+{
+	struct MessageUnit_C *reg = (struct MessageUnit_C *)acb->pmuC;
+	uint32_t flag_ccb, ccb_cdb_phy;
+	struct ARCMSR_CDB *arcmsr_cdb;
+	bool error;
+	struct CommandControlBlock *pCCB;
+	uint32_t poll_ccb_done = 0, poll_count = 0;
+	int rtn;
+polling_hbc_ccb_retry:
+	poll_count++;
+	while (1) {
+		if ((readl(&reg->host_int_status) & ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR) == 0) {
+			if (poll_ccb_done) {
+				rtn = SUCCESS;
+				break;
+			} else {
+				msleep(25);
+				if (poll_count > 100) {
+					rtn = FAILED;
+					break;
+				}
+				goto polling_hbc_ccb_retry;
+			}
+		}
+		flag_ccb = readl(&reg->outbound_queueport_low);
+		ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
+		arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset + ccb_cdb_phy);/*frame must be 32 bytes aligned*/
+		pCCB = container_of(arcmsr_cdb, struct CommandControlBlock, arcmsr_cdb);
+		poll_ccb_done = (pCCB == poll_ccb) ? 1 : 0;
+		/* check ifcommand done with no error*/
+		if ((pCCB->acb != acb) || (pCCB->startdone != ARCMSR_CCB_START)) {
+			if (pCCB->startdone == ARCMSR_CCB_ABORTED) {
+				printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
+					" poll command abort successfully \n"
+					, acb->host->host_no
+					, pCCB->pcmd->device->id
+					, pCCB->pcmd->device->lun
+					, pCCB);
+					pCCB->pcmd->result = DID_ABORT << 16;
+					arcmsr_ccb_complete(pCCB);
+				continue;
+			}
+			printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
+				" command done ccb = '0x%p'"
+				"ccboutstandingcount = %d \n"
+				, acb->host->host_no
+				, pCCB
+				, atomic_read(&acb->ccboutstandingcount));
+			continue;
+		}
+		error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1) ? true : false;
+		arcmsr_report_ccb_state(acb, pCCB, error);
+	}
+	return rtn;
+}
+static int arcmsr_polling_ccbdone(struct AdapterControlBlock *acb,
+					struct CommandControlBlock *poll_ccb)
+{
+	int rtn = 0;
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		rtn = arcmsr_polling_hba_ccbdone(acb, poll_ccb);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		rtn = arcmsr_polling_hbb_ccbdone(acb, poll_ccb);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		rtn = arcmsr_polling_hbc_ccbdone(acb, poll_ccb);
+		}
+	}
+	return rtn;
+}
+
+static int arcmsr_iop_confirm(struct AdapterControlBlock *acb)
+{
+	uint32_t cdb_phyaddr, cdb_phyaddr_hi32;
+	dma_addr_t dma_coherent_handle;
+	/*
+	********************************************************************
+	** here we need to tell iop 331 our freeccb.HighPart
+	** if freeccb.HighPart is not zero
+	********************************************************************
+	*/
+	dma_coherent_handle = acb->dma_coherent_handle;
+	cdb_phyaddr = (uint32_t)(dma_coherent_handle);
+	cdb_phyaddr_hi32 = (uint32_t)((cdb_phyaddr >> 16) >> 16);
+	acb->cdb_phyaddr_hi32 = cdb_phyaddr_hi32;
+	/*
+	***********************************************************************
+	**    if adapter type B, set window of "post command Q"
+	***********************************************************************
+	*/
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		if (cdb_phyaddr_hi32 != 0) {
+			struct MessageUnit_A __iomem *reg = acb->pmuA;
+			uint32_t intmask_org;
+			intmask_org = arcmsr_disable_outbound_ints(acb);
+			writel(ARCMSR_SIGNATURE_SET_CONFIG, \
+						&reg->message_rwbuffer[0]);
+			writel(cdb_phyaddr_hi32, &reg->message_rwbuffer[1]);
+			writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, \
+							&reg->inbound_msgaddr0);
+			if (!arcmsr_hba_wait_msgint_ready(acb)) {
+				printk(KERN_NOTICE "arcmsr%d: ""set ccb high \
+				part physical address timeout\n",
+				acb->host->host_no);
+				return 1;
+			}
+			arcmsr_enable_outbound_ints(acb, intmask_org);
+		}
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		unsigned long post_queue_phyaddr;
+		uint32_t __iomem *rwbuffer;
+
+		struct MessageUnit_B *reg = acb->pmuB;
+		uint32_t intmask_org;
+		intmask_org = arcmsr_disable_outbound_ints(acb);
+		reg->postq_index = 0;
+		reg->doneq_index = 0;
+		writel(ARCMSR_MESSAGE_SET_POST_WINDOW, reg->drv2iop_doorbell);
+		if (!arcmsr_hbb_wait_msgint_ready(acb)) {
+			printk(KERN_NOTICE "arcmsr%d:can not set diver mode\n", \
+				acb->host->host_no);
+			return 1;
+		}
+		post_queue_phyaddr = acb->dma_coherent_handle_hbb_mu;
+		rwbuffer = reg->message_rwbuffer;
+		/* driver "set config" signature */
+		writel(ARCMSR_SIGNATURE_SET_CONFIG, rwbuffer++);
+		/* normal should be zero */
+		writel(cdb_phyaddr_hi32, rwbuffer++);
+		/* postQ size (256 + 8)*4	 */
+		writel(post_queue_phyaddr, rwbuffer++);
+		/* doneQ size (256 + 8)*4	 */
+		writel(post_queue_phyaddr + 1056, rwbuffer++);
+		/* ccb maxQ size must be --> [(256 + 8)*4]*/
+		writel(1056, rwbuffer);
+
+		writel(ARCMSR_MESSAGE_SET_CONFIG, reg->drv2iop_doorbell);
+		if (!arcmsr_hbb_wait_msgint_ready(acb)) {
+			printk(KERN_NOTICE "arcmsr%d: 'set command Q window' \
+			timeout \n",acb->host->host_no);
+			return 1;
+		}
+		arcmsr_hbb_enable_driver_mode(acb);
+		arcmsr_enable_outbound_ints(acb, intmask_org);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		if (cdb_phyaddr_hi32 != 0) {
+			struct MessageUnit_C *reg = (struct MessageUnit_C *)acb->pmuC;
+
+			printk(KERN_NOTICE "arcmsr%d: cdb_phyaddr_hi32=0x%x\n",
+					acb->adapter_index, cdb_phyaddr_hi32);
+			writel(ARCMSR_SIGNATURE_SET_CONFIG, &reg->msgcode_rwbuffer[0]);
+			writel(cdb_phyaddr_hi32, &reg->msgcode_rwbuffer[1]);
+			writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, &reg->inbound_msgaddr0);
+			writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
+			if (!arcmsr_hbc_wait_msgint_ready(acb)) {
+				printk(KERN_NOTICE "arcmsr%d: 'set command Q window' \
+				timeout \n", acb->host->host_no);
+				return 1;
+			}
+		}
+		}
+	}
+	return 0;
+}
+
+static void arcmsr_wait_firmware_ready(struct AdapterControlBlock *acb)
+{
+	uint32_t firmware_state = 0;
+	switch (acb->adapter_type) {
+
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		do {
+			firmware_state = readl(&reg->outbound_msgaddr1);
+		} while ((firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) == 0);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		do {
+			firmware_state = readl(reg->iop2drv_doorbell);
+		} while ((firmware_state & ARCMSR_MESSAGE_FIRMWARE_OK) == 0);
+		writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT, reg->drv2iop_doorbell);
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C *reg = (struct MessageUnit_C *)acb->pmuC;
+		do {
+			firmware_state = readl(&reg->outbound_msgaddr1);
+		} while ((firmware_state & ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK) == 0);
+		}
+	}
+}
+
+static void arcmsr_request_hba_device_map(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	if (unlikely(atomic_read(&acb->rq_map_token) == 0) || ((acb->acb_flags & ACB_F_BUS_RESET) != 0 ) || ((acb->acb_flags & ACB_F_ABORT) != 0 )){
+		mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+		return;
+	} else {
+		acb->fw_flag = FW_NORMAL;
+		if (atomic_read(&acb->ante_token_value) == atomic_read(&acb->rq_map_token)){
+			atomic_set(&acb->rq_map_token, 16);
+		}
+		atomic_set(&acb->ante_token_value, atomic_read(&acb->rq_map_token));
+		if (atomic_dec_and_test(&acb->rq_map_token)) {
+			mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+			return;
+		}
+		writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
+		mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+	}
+	return;
+}
+
+static void arcmsr_request_hbb_device_map(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B __iomem *reg = acb->pmuB;
+	if (unlikely(atomic_read(&acb->rq_map_token) == 0) || ((acb->acb_flags & ACB_F_BUS_RESET) != 0 ) || ((acb->acb_flags & ACB_F_ABORT) != 0 )){
+		mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+		return;
+	} else {
+		acb->fw_flag = FW_NORMAL;
+		if (atomic_read(&acb->ante_token_value) == atomic_read(&acb->rq_map_token)) {
+			atomic_set(&acb->rq_map_token, 16);
+		}
+		atomic_set(&acb->ante_token_value, atomic_read(&acb->rq_map_token));
+		if (atomic_dec_and_test(&acb->rq_map_token)) {
+			mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+			return;
+		}
+		writel(ARCMSR_MESSAGE_GET_CONFIG, reg->drv2iop_doorbell);
+		mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+	}
+	return;
+}
+
+static void arcmsr_request_hbc_device_map(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_C __iomem *reg = acb->pmuC;
+	if (unlikely(atomic_read(&acb->rq_map_token) == 0) || ((acb->acb_flags & ACB_F_BUS_RESET) != 0) || ((acb->acb_flags & ACB_F_ABORT) != 0)) {
+		mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+		return;
+	} else {
+		acb->fw_flag = FW_NORMAL;
+		if (atomic_read(&acb->ante_token_value) == atomic_read(&acb->rq_map_token)) {
+			atomic_set(&acb->rq_map_token, 16);
+		}
+		atomic_set(&acb->ante_token_value, atomic_read(&acb->rq_map_token));
+		if (atomic_dec_and_test(&acb->rq_map_token)) {
+			mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+			return;
+		}
+		writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
+		writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
+		mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+	}
+	return;
+}
+
+static void arcmsr_request_device_map(unsigned long pacb)
+{
+	struct AdapterControlBlock *acb = (struct AdapterControlBlock *)pacb;
+	switch (acb->adapter_type) {
+		case ACB_ADAPTER_TYPE_A: {
+			arcmsr_request_hba_device_map(acb);
+		}
+		break;
+		case ACB_ADAPTER_TYPE_B: {
+			arcmsr_request_hbb_device_map(acb);
+		}
+		break;
+		case ACB_ADAPTER_TYPE_C: {
+			arcmsr_request_hbc_device_map(acb);
+		}
+	}
+}
+
+static void arcmsr_start_hba_bgrb(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_A __iomem *reg = acb->pmuA;
+	acb->acb_flags |= ACB_F_MSG_START_BGRB;
+	writel(ARCMSR_INBOUND_MESG0_START_BGRB, &reg->inbound_msgaddr0);
+	if (!arcmsr_hba_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
+				rebulid' timeout \n", acb->host->host_no);
+	}
+}
+
+static void arcmsr_start_hbb_bgrb(struct AdapterControlBlock *acb)
+{
+	struct MessageUnit_B *reg = acb->pmuB;
+	acb->acb_flags |= ACB_F_MSG_START_BGRB;
+	writel(ARCMSR_MESSAGE_START_BGRB, reg->drv2iop_doorbell);
+	if (!arcmsr_hbb_wait_msgint_ready(acb)) {
+		printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
+				rebulid' timeout \n",acb->host->host_no);
+	}
+}
+
+static void arcmsr_start_hbc_bgrb(struct AdapterControlBlock *pACB)
+{
+	struct MessageUnit_C *phbcmu = (struct MessageUnit_C *)pACB->pmuC;
+	pACB->acb_flags |= ACB_F_MSG_START_BGRB;
+	writel(ARCMSR_INBOUND_MESG0_START_BGRB, &phbcmu->inbound_msgaddr0);
+	writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &phbcmu->inbound_doorbell);
+	if (!arcmsr_hbc_wait_msgint_ready(pACB)) {
+		printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
+				rebulid' timeout \n", pACB->host->host_no);
+	}
+	return;
+}
+static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A:
+		arcmsr_start_hba_bgrb(acb);
+		break;
+	case ACB_ADAPTER_TYPE_B:
+		arcmsr_start_hbb_bgrb(acb);
+		break;
+	case ACB_ADAPTER_TYPE_C:
+		arcmsr_start_hbc_bgrb(acb);
+	}
+}
+
+static void arcmsr_clear_doorbell_queue_buffer(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A: {
+		struct MessageUnit_A __iomem *reg = acb->pmuA;
+		uint32_t outbound_doorbell;
+		/* empty doorbell Qbuffer if door bell ringed */
+		outbound_doorbell = readl(&reg->outbound_doorbell);
+		/*clear doorbell interrupt */
+		writel(outbound_doorbell, &reg->outbound_doorbell);
+		writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
+		}
+		break;
+
+	case ACB_ADAPTER_TYPE_B: {
+		struct MessageUnit_B *reg = acb->pmuB;
+		/*clear interrupt and message state*/
+		writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
+		writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell);
+		/* let IOP know data has been read */
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C: {
+		struct MessageUnit_C *reg = (struct MessageUnit_C *)acb->pmuC;
+		uint32_t outbound_doorbell;
+		/* empty doorbell Qbuffer if door bell ringed */
+		outbound_doorbell = readl(&reg->outbound_doorbell);
+		writel(outbound_doorbell, &reg->outbound_doorbell_clear);
+		writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, &reg->inbound_doorbell);
+		}
+	}
+}
+
+static void arcmsr_enable_eoi_mode(struct AdapterControlBlock *acb)
+{
+	switch (acb->adapter_type) {
+	case ACB_ADAPTER_TYPE_A:
+		return;
+	case ACB_ADAPTER_TYPE_B:
+		{
+			struct MessageUnit_B *reg = acb->pmuB;
+			writel(ARCMSR_MESSAGE_ACTIVE_EOI_MODE, reg->drv2iop_doorbell);
+			if (!arcmsr_hbb_wait_msgint_ready(acb)) {
+				printk(KERN_NOTICE "ARCMSR IOP enables EOI_MODE TIMEOUT");
+				return;
+			}
+		}
+		break;
+	case ACB_ADAPTER_TYPE_C:
+		return;
+	}
+	return;
+}
+
+static void arcmsr_hardware_reset(struct AdapterControlBlock *acb)
+{
+	uint8_t value[64];
+	int i, count = 0;
+	struct MessageUnit_A __iomem *pmuA = acb->pmuA;
+	struct MessageUnit_C __iomem *pmuC = acb->pmuC;
+	u32 temp = 0;
+	/* backup pci config data */
+	printk(KERN_NOTICE "arcmsr%d: executing hw bus reset .....\n", acb->host->host_no);
+	for (i = 0; i < 64; i++) {
+		pci_read_config_byte(acb->pdev, i, &value[i]);
+	}
+	/* hardware reset signal */
+	if ((acb->dev_id == 0x1680)) {
+		writel(ARCMSR_ARC1680_BUS_RESET, &pmuA->reserved1[0]);
+	} else if ((acb->dev_id == 0x1880)) {
+		do {
+			count++;
+			writel(0xF, &pmuC->write_sequence);
+			writel(0x4, &pmuC->write_sequence);
+			writel(0xB, &pmuC->write_sequence);
+			writel(0x2, &pmuC->write_sequence);
+			writel(0x7, &pmuC->write_sequence);
+			writel(0xD, &pmuC->write_sequence);
+		} while ((((temp = readl(&pmuC->host_diagnostic)) | ARCMSR_ARC1880_DiagWrite_ENABLE) == 0) && (count < 5));
+		writel(ARCMSR_ARC1880_RESET_ADAPTER, &pmuC->host_diagnostic);
+	} else {
+		pci_write_config_byte(acb->pdev, 0x84, 0x20);
+	}
+	msleep(2000);
+	/* write back pci config data */
+	for (i = 0; i < 64; i++) {
+		pci_write_config_byte(acb->pdev, i, value[i]);
+	}
+	msleep(1000);
+	return;
+}
+static void arcmsr_iop_init(struct AdapterControlBlock *acb)
+{
+	uint32_t intmask_org;
+	/* disable all outbound interrupt */
+	intmask_org = arcmsr_disable_outbound_ints(acb);
+	arcmsr_wait_firmware_ready(acb);
+	arcmsr_iop_confirm(acb);
+	/*start background rebuild*/
+	arcmsr_start_adapter_bgrb(acb);
+	/* empty doorbell Qbuffer if door bell ringed */
+	arcmsr_clear_doorbell_queue_buffer(acb);
+	arcmsr_enable_eoi_mode(acb);
+	/* enable outbound Post Queue,outbound doorbell Interrupt */
+	arcmsr_enable_outbound_ints(acb, intmask_org);
+	acb->acb_flags |= ACB_F_IOP_INITED;
+}
+
+static uint8_t arcmsr_iop_reset(struct AdapterControlBlock *acb)
+{
+	struct CommandControlBlock *ccb;
+	uint32_t intmask_org;
+	uint8_t rtnval = 0x00;
+	int i = 0;
+	unsigned long flags;
+
+	if (atomic_read(&acb->ccboutstandingcount) != 0) {
+		/* disable all outbound interrupt */
+		intmask_org = arcmsr_disable_outbound_ints(acb);
+		/* talk to iop 331 outstanding command aborted */
+		rtnval = arcmsr_abort_allcmd(acb);
+		/* clear all outbound posted Q */
+		arcmsr_done4abort_postqueue(acb);
+		for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
+			ccb = acb->pccb_pool[i];
+			if (ccb->startdone == ARCMSR_CCB_START) {
+				scsi_dma_unmap(ccb->pcmd);
+				ccb->startdone = ARCMSR_CCB_DONE;
+				ccb->ccb_flags = 0;
+				spin_lock_irqsave(&acb->ccblist_lock, flags);
+				list_add_tail(&ccb->list, &acb->ccb_free_list);
+				spin_unlock_irqrestore(&acb->ccblist_lock, flags);
+			}
+		}
+		atomic_set(&acb->ccboutstandingcount, 0);
+		/* enable all outbound interrupt */
+		arcmsr_enable_outbound_ints(acb, intmask_org);
+		return rtnval;
+	}
+	return rtnval;
+}
+
+static int arcmsr_bus_reset(struct scsi_cmnd *cmd)
+{
+	struct AdapterControlBlock *acb;
+	uint32_t intmask_org, outbound_doorbell;
+	int retry_count = 0;
+	int rtn = FAILED;
+	acb = (struct AdapterControlBlock *) cmd->device->host->hostdata;
+	printk(KERN_ERR "arcmsr: executing bus reset eh.....num_resets = %d, num_aborts = %d \n", acb->num_resets, acb->num_aborts);
+	acb->num_resets++;
+
+	switch(acb->adapter_type){
+		case ACB_ADAPTER_TYPE_A:{
+			if (acb->acb_flags & ACB_F_BUS_RESET){
+				long timeout;
+				printk(KERN_ERR "arcmsr: there is an  bus reset eh proceeding.......\n");
+				timeout = wait_event_timeout(wait_q, (acb->acb_flags & ACB_F_BUS_RESET) == 0, 220*HZ);
+				if (timeout) {
+					return SUCCESS;
+				}
+			}
+			acb->acb_flags |= ACB_F_BUS_RESET;
+			if (!arcmsr_iop_reset(acb)) {
+				struct MessageUnit_A __iomem *reg;
+				reg = acb->pmuA;
+				arcmsr_hardware_reset(acb);
+				acb->acb_flags &= ~ACB_F_IOP_INITED;
+sleep_again:
+				ssleep(ARCMSR_SLEEPTIME);
+				if ((readl(&reg->outbound_msgaddr1) & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) == 0) {
+					printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, retry=%d\n", acb->host->host_no, retry_count);
+					if (retry_count > ARCMSR_RETRYCOUNT) {
+						acb->fw_flag = FW_DEADLOCK;
+						printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, RETRY TERMINATED!!\n", acb->host->host_no);
+						return FAILED;
+					}
+					retry_count++;
+					goto sleep_again;
+				}
+				acb->acb_flags |= ACB_F_IOP_INITED;
+				/* disable all outbound interrupt */
+				intmask_org = arcmsr_disable_outbound_ints(acb);
+				arcmsr_get_firmware_spec(acb);
+				arcmsr_start_adapter_bgrb(acb);
+				/* clear Qbuffer if door bell ringed */
+				outbound_doorbell = readl(&reg->outbound_doorbell);
+				writel(outbound_doorbell, &reg->outbound_doorbell); /*clear interrupt */
+   				writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
+				/* enable outbound Post Queue,outbound doorbell Interrupt */
+				arcmsr_enable_outbound_ints(acb, intmask_org);
+				atomic_set(&acb->rq_map_token, 16);
+				atomic_set(&acb->ante_token_value, 16);
+				acb->fw_flag = FW_NORMAL;
+				mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+				acb->acb_flags &= ~ACB_F_BUS_RESET;
+				rtn = SUCCESS;
+				printk(KERN_ERR "arcmsr: scsi  bus reset eh returns with success\n");
+			} else {
+				acb->acb_flags &= ~ACB_F_BUS_RESET;
+				atomic_set(&acb->rq_map_token, 16);
+				atomic_set(&acb->ante_token_value, 16);
+				acb->fw_flag = FW_NORMAL;
+				mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6*HZ));
+				rtn = SUCCESS;
+			}
+			break;
+		}
+		case ACB_ADAPTER_TYPE_B:{
+			acb->acb_flags |= ACB_F_BUS_RESET;
+			if (!arcmsr_iop_reset(acb)) {
+				acb->acb_flags &= ~ACB_F_BUS_RESET;
+				rtn = FAILED;
+			} else {
+				acb->acb_flags &= ~ACB_F_BUS_RESET;
+				atomic_set(&acb->rq_map_token, 16);
+				atomic_set(&acb->ante_token_value, 16);
+				acb->fw_flag = FW_NORMAL;
+				mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+				rtn = SUCCESS;
+			}
+			break;
+		}
+		case ACB_ADAPTER_TYPE_C:{
+			if (acb->acb_flags & ACB_F_BUS_RESET) {
+				long timeout;
+				printk(KERN_ERR "arcmsr: there is an bus reset eh proceeding.......\n");
+				timeout = wait_event_timeout(wait_q, (acb->acb_flags & ACB_F_BUS_RESET) == 0, 220*HZ);
+				if (timeout) {
+					return SUCCESS;
+				}
+			}
+			acb->acb_flags |= ACB_F_BUS_RESET;
+			if (!arcmsr_iop_reset(acb)) {
+				struct MessageUnit_C __iomem *reg;
+				reg = acb->pmuC;
+				arcmsr_hardware_reset(acb);
+				acb->acb_flags &= ~ACB_F_IOP_INITED;
+sleep:
+				ssleep(ARCMSR_SLEEPTIME);
+				if ((readl(&reg->host_diagnostic) & 0x04) != 0) {
+					printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, retry=%d\n", acb->host->host_no, retry_count);
+					if (retry_count > ARCMSR_RETRYCOUNT) {
+						acb->fw_flag = FW_DEADLOCK;
+						printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, RETRY TERMINATED!!\n", acb->host->host_no);
+						return FAILED;
+					}
+					retry_count++;
+					goto sleep;
+				}
+				acb->acb_flags |= ACB_F_IOP_INITED;
+				/* disable all outbound interrupt */
+				intmask_org = arcmsr_disable_outbound_ints(acb);
+				arcmsr_get_firmware_spec(acb);
+				arcmsr_start_adapter_bgrb(acb);
+				/* clear Qbuffer if door bell ringed */
+				outbound_doorbell = readl(&reg->outbound_doorbell);
+				writel(outbound_doorbell, &reg->outbound_doorbell_clear); /*clear interrupt */
+				writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, &reg->inbound_doorbell);
+				/* enable outbound Post Queue,outbound doorbell Interrupt */
+				arcmsr_enable_outbound_ints(acb, intmask_org);
+				atomic_set(&acb->rq_map_token, 16);
+				atomic_set(&acb->ante_token_value, 16);
+				acb->fw_flag = FW_NORMAL;
+				mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
+				acb->acb_flags &= ~ACB_F_BUS_RESET;
+				rtn = SUCCESS;
+				printk(KERN_ERR "arcmsr: scsi bus reset eh returns with success\n");
+			} else {
+				acb->acb_flags &= ~ACB_F_BUS_RESET;
+				atomic_set(&acb->rq_map_token, 16);
+				atomic_set(&acb->ante_token_value, 16);
+				acb->fw_flag = FW_NORMAL;
+				mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6*HZ));
+				rtn = SUCCESS;
+			}
+			break;
+		}
+	}
+	return rtn;
+}
+
+static int arcmsr_abort_one_cmd(struct AdapterControlBlock *acb,
+		struct CommandControlBlock *ccb)
+{
+	int rtn;
+	rtn = arcmsr_polling_ccbdone(acb, ccb);
+	return rtn;
+}
+
+static int arcmsr_abort(struct scsi_cmnd *cmd)
+{
+	struct AdapterControlBlock *acb =
+		(struct AdapterControlBlock *)cmd->device->host->hostdata;
+	int i = 0;
+	int rtn = FAILED;
+	printk(KERN_NOTICE
+		"arcmsr%d: abort device command of scsi id = %d lun = %d \n",
+		acb->host->host_no, cmd->device->id, cmd->device->lun);
+	acb->acb_flags |= ACB_F_ABORT;
+	acb->num_aborts++;
+	/*
+	************************************************
+	** the all interrupt service routine is locked
+	** we need to handle it as soon as possible and exit
+	************************************************
+	*/
+	if (!atomic_read(&acb->ccboutstandingcount))
+		return rtn;
+
+	for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
+		struct CommandControlBlock *ccb = acb->pccb_pool[i];
+		if (ccb->startdone == ARCMSR_CCB_START && ccb->pcmd == cmd) {
+			ccb->startdone = ARCMSR_CCB_ABORTED;
+			rtn = arcmsr_abort_one_cmd(acb, ccb);
+			break;
+		}
+	}
+	acb->acb_flags &= ~ACB_F_ABORT;
+	return rtn;
+}
+
+static const char *arcmsr_info(struct Scsi_Host *host)
+{
+	struct AdapterControlBlock *acb =
+		(struct AdapterControlBlock *) host->hostdata;
+	static char buf[256];
+	char *type;
+	int raid6 = 1;
+	switch (acb->pdev->device) {
+	case PCI_DEVICE_ID_ARECA_1110:
+	case PCI_DEVICE_ID_ARECA_1200:
+	case PCI_DEVICE_ID_ARECA_1202:
+	case PCI_DEVICE_ID_ARECA_1210:
+		raid6 = 0;
+		/*FALLTHRU*/
+	case PCI_DEVICE_ID_ARECA_1120:
+	case PCI_DEVICE_ID_ARECA_1130:
+	case PCI_DEVICE_ID_ARECA_1160:
+	case PCI_DEVICE_ID_ARECA_1170:
+	case PCI_DEVICE_ID_ARECA_1201:
+	case PCI_DEVICE_ID_ARECA_1220:
+	case PCI_DEVICE_ID_ARECA_1230:
+	case PCI_DEVICE_ID_ARECA_1260:
+	case PCI_DEVICE_ID_ARECA_1270:
+	case PCI_DEVICE_ID_ARECA_1280:
+		type = "SATA";
+		break;
+	case PCI_DEVICE_ID_ARECA_1380:
+	case PCI_DEVICE_ID_ARECA_1381:
+	case PCI_DEVICE_ID_ARECA_1680:
+	case PCI_DEVICE_ID_ARECA_1681:
+	case PCI_DEVICE_ID_ARECA_1880:
+		type = "SAS";
+		break;
+	default:
+		type = "X-TYPE";
+		break;
+	}
+	sprintf(buf, "Areca %s Host Adapter RAID Controller%s\n %s",
+			type, raid6 ? "( RAID6 capable)" : "",
+			ARCMSR_DRIVER_VERSION);
+	return buf;
+}