freebsd-nq/sys/dev/arcmsr/arcmsr.c

/*
*****************************************************************************************
**        O.S   : FreeBSD
**   FILE NAME  : arcmsr.c
**        BY    : Erich Chen   
**   Description: SCSI RAID Device Driver for 
**                ARECA (ARC11XX/ARC12XX/ARC13XX/ARC16XX) SATA/SAS RAID HOST Adapter
**                ARCMSR RAID Host adapter
**                [RAID controller:INTEL 331(PCI-X) 341(PCI-EXPRESS) chip set]
******************************************************************************************
************************************************************************
**
** Copyright (c) 2004-2006 ARECA Co. Ltd.
**        Erich Chen, Taipei Taiwan All rights reserved.
**
** 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.
**************************************************************************
** History
**
**        REV#         DATE	            NAME	         DESCRIPTION
**     1.00.00.00    3/31/2004	       Erich Chen	     First release
**     1.20.00.02   11/29/2004         Erich Chen        bug fix with arcmsr_bus_reset when PHY error
**     1.20.00.03    4/19/2005         Erich Chen        add SATA 24 Ports adapter type support
**                                                       clean unused function
**     1.20.00.12    9/12/2005         Erich Chen        bug fix with abort command handling, 
**                                                       firmware version check 
**                                                       and firmware update notify for hardware bug fix
**                                                       handling if none zero high part physical address 
**                                                       of srb resource 
**     1.20.00.13    8/18/2006         Erich Chen        remove pending srb and report busy
**                                                       add iop message xfer 
**                                                       with scsi pass-through command
**                                                       add new device id of sas raid adapters 
**                                                       code fit for SPARC64 & PPC 
**     1.20.00.14   02/05/2007         Erich Chen        bug fix for incorrect ccb_h.status report
**                                                       and cause g_vfs_done() read write error

******************************************************************************************
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/devicestat.h>
#include <sys/kthread.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/sysctl.h>
#include <sys/poll.h>
#include <sys/ioccom.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>

#include <isa/rtc.h>

#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/atomic.h>
#include <sys/conf.h>
#include <sys/rman.h>

#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
/*
**************************************************************************
**************************************************************************
*/
#if __FreeBSD_version >= 500005
    #include <sys/selinfo.h>
    #include <sys/mutex.h>
    #include <sys/endian.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    #define ARCMSR_LOCK_INIT(l, s)	mtx_init(l, s, NULL, MTX_DEF|MTX_RECURSE)
    #define ARCMSR_LOCK_ACQUIRE(l)	mtx_lock(l)
    #define ARCMSR_LOCK_RELEASE(l)	mtx_unlock(l)
    #define ARCMSR_LOCK_TRY(l)		mtx_trylock(l)
    #define arcmsr_htole32(x)		htole32(x)
    typedef struct mtx		arcmsr_lock_t;
#else
    #include <sys/select.h>
    #include <pci/pcivar.h>
    #include <pci/pcireg.h>
    #define ARCMSR_LOCK_INIT(l, s)	simple_lock_init(l)
    #define ARCMSR_LOCK_ACQUIRE(l)	simple_lock(l)
    #define ARCMSR_LOCK_RELEASE(l)	simple_unlock(l)
    #define ARCMSR_LOCK_TRY(l)		simple_lock_try(l)
    #define arcmsr_htole32(x)		(x)
    typedef struct simplelock		arcmsr_lock_t;
#endif
#include <dev/arcmsr/arcmsr.h>
#define ARCMSR_SRBS_POOL_SIZE           ((sizeof(struct CommandControlBlock) * ARCMSR_MAX_FREESRB_NUM)+0x20)
/*
**************************************************************************
**************************************************************************
*/
#define CHIP_REG_READ32(r)	bus_space_read_4(acb->btag, acb->bhandle, offsetof(struct MessageUnit,r))
#define CHIP_REG_WRITE32(r,d)	bus_space_write_4(acb->btag, acb->bhandle, offsetof(struct MessageUnit,r), d)
/*
**************************************************************************
**************************************************************************
*/
static struct CommandControlBlock * arcmsr_get_freesrb(struct AdapterControlBlock *acb);
static u_int8_t arcmsr_seek_cmd2abort(union ccb * abortccb);
static u_int8_t arcmsr_wait_msgint_ready(struct AdapterControlBlock *acb);
static u_int32_t arcmsr_probe(device_t dev);
static u_int32_t arcmsr_attach(device_t dev);
static u_int32_t arcmsr_detach(device_t dev);
static u_int32_t arcmsr_iop_ioctlcmd(struct AdapterControlBlock *acb, u_int32_t ioctl_cmd, caddr_t arg);
static void arcmsr_iop_parking(struct AdapterControlBlock *acb);
static void arcmsr_shutdown(device_t dev);
static void arcmsr_interrupt(void *arg);
static void arcmsr_polling_srbdone(struct AdapterControlBlock *acb, struct CommandControlBlock *poll_srb);
static void arcmsr_free_resource(struct AdapterControlBlock *acb);
static void arcmsr_bus_reset(struct AdapterControlBlock *acb);
static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb);
static void arcmsr_iop_init(struct AdapterControlBlock *acb);
static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb);
static void arcmsr_post_Qbuffer(struct AdapterControlBlock *acb);
static void arcmsr_abort_allcmd(struct AdapterControlBlock *acb);
static void arcmsr_srb_complete(struct CommandControlBlock *srb, int stand_flag);
static void arcmsr_iop_reset(struct AdapterControlBlock *acb);
static void arcmsr_report_sense_info(struct CommandControlBlock *srb);
static void arcmsr_build_srb(struct CommandControlBlock *srb, bus_dma_segment_t * dm_segs, u_int32_t nseg);
static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, union ccb * pccb);
static int arcmsr_resume(device_t dev);
static int arcmsr_suspend(device_t dev);
/*
**************************************************************************
**************************************************************************
*/
static void UDELAY(u_int32_t us) { DELAY(us); }
/*
**************************************************************************
**************************************************************************
*/
static bus_dmamap_callback_t arcmsr_map_freesrb;
static bus_dmamap_callback_t arcmsr_executesrb;
/*
**************************************************************************
**************************************************************************
*/
static d_open_t	arcmsr_open;
static d_close_t arcmsr_close;
static d_ioctl_t arcmsr_ioctl;

static device_method_t arcmsr_methods[]={
	DEVMETHOD(device_probe,		arcmsr_probe),
	DEVMETHOD(device_attach,	arcmsr_attach),
	DEVMETHOD(device_detach,	arcmsr_detach),
	DEVMETHOD(device_shutdown,	arcmsr_shutdown),
	DEVMETHOD(device_suspend,	arcmsr_suspend),
	DEVMETHOD(device_resume,	arcmsr_resume),

	DEVMETHOD(bus_print_child,	bus_generic_print_child),
	DEVMETHOD(bus_driver_added, 	bus_generic_driver_added),
	{ 0, 0 }
};

static driver_t arcmsr_driver={
	"arcmsr", arcmsr_methods, sizeof(struct AdapterControlBlock)
};

static devclass_t arcmsr_devclass;
DRIVER_MODULE(arcmsr, pci, arcmsr_driver, arcmsr_devclass, 0, 0);
MODULE_DEPEND(arcmsr, pci, 1, 1, 1);
MODULE_DEPEND(arcmsr, cam, 1, 1, 1);
#ifndef BUS_DMA_COHERENT		
	#define	BUS_DMA_COHERENT	0x04	/* hint: map memory in a coherent way */
#endif
#if __FreeBSD_version >= 501000
	#ifndef D_NEEDGIANT
		#define D_NEEDGIANT	0x00400000	/* driver want Giant */
	#endif
	#ifndef D_VERSION
		#define D_VERSION	0x20011966
	#endif
	static struct cdevsw arcmsr_cdevsw={
	#if __FreeBSD_version > 502010
		.d_version = D_VERSION, 
	#endif
	.d_flags   = D_NEEDGIANT, 
	.d_open    = arcmsr_open, 		/* open     */
	.d_close   = arcmsr_close, 		/* close    */
	.d_ioctl   = arcmsr_ioctl, 		/* ioctl    */
	.d_name    = "arcmsr", 			/* name     */
	};
#else
	#define ARCMSR_CDEV_MAJOR	180

	static struct cdevsw arcmsr_cdevsw = {
		arcmsr_open, 		        /* open     */
		arcmsr_close, 		        /* close    */
		noread, 		        /* read     */
		nowrite, 		        /* write    */
		arcmsr_ioctl, 		        /* ioctl    */
		nopoll, 		        /* poll     */
		nommap, 		        /* mmap     */
		nostrategy, 		        /* strategy */
		"arcmsr", 		        /* name     */
		ARCMSR_CDEV_MAJOR, 		/* major    */
		nodump, 			/* dump     */
		nopsize, 			/* psize    */
		0				/* flags    */
	};
#endif

#if __FreeBSD_version < 500005
	static int arcmsr_open(dev_t dev, int flags, int fmt, struct proc *proc)
#else
    #if __FreeBSD_version < 503000
	static int arcmsr_open(dev_t dev, int flags, int fmt, struct thread *proc)
    #else
	static int arcmsr_open(struct cdev *dev, int flags, int fmt, d_thread_t *proc)
    #endif 
#endif
{
	#if __FreeBSD_version < 503000
	    struct AdapterControlBlock *acb=dev->si_drv1;
	#else
		int	unit = minor(dev);
		struct AdapterControlBlock *acb = devclass_get_softc(arcmsr_devclass, unit);
	#endif
	if(acb==NULL) {
		return ENXIO;
	}
	return 0;
}
/*
**************************************************************************
**************************************************************************
*/
#if __FreeBSD_version < 500005
	static int arcmsr_close(dev_t dev, int flags, int fmt, struct proc *proc)
#else
    #if __FreeBSD_version < 503000
	static int arcmsr_close(dev_t dev, int flags, int fmt, struct thread *proc)
    #else
	static int arcmsr_close(struct cdev *dev, int flags, int fmt, d_thread_t *proc)
    #endif 
#endif
{
	#if __FreeBSD_version < 503000
		struct AdapterControlBlock *acb=dev->si_drv1;
	#else
		int	unit = minor(dev);
		struct AdapterControlBlock *acb = devclass_get_softc(arcmsr_devclass, unit);
	#endif
	if(acb==NULL) {
		return ENXIO;
	}
	return 0;
}
/*
**************************************************************************
**************************************************************************
*/
#if __FreeBSD_version < 500005
	static int arcmsr_ioctl(dev_t dev, u_long ioctl_cmd, caddr_t arg, int flags, struct proc *proc)
#else
    #if __FreeBSD_version < 503000
	static int arcmsr_ioctl(dev_t dev, u_long ioctl_cmd, caddr_t arg, int flags, struct thread *proc)
    #else
	static int arcmsr_ioctl(struct cdev *dev, u_long ioctl_cmd, caddr_t arg, int flags, d_thread_t *proc)
    #endif 
#endif
{
	#if __FreeBSD_version < 503000
		struct AdapterControlBlock *acb=dev->si_drv1;
	#else
		int	unit = minor(dev);
		struct AdapterControlBlock *acb = devclass_get_softc(arcmsr_devclass, unit);
	#endif

	if(acb==NULL) {
		return ENXIO;
	}
	return(arcmsr_iop_ioctlcmd(acb, ioctl_cmd, arg));
}
/*
*******************************************************************************
*******************************************************************************
*/
static int arcmsr_suspend(device_t dev)
{
	struct AdapterControlBlock	*acb = device_get_softc(dev);
	u_int32_t intmask_org;

	/* disable all outbound interrupt */
	intmask_org=CHIP_REG_READ32(outbound_intmask);
	CHIP_REG_WRITE32(outbound_intmask, (intmask_org|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE));
	/* flush controller */
	arcmsr_iop_parking(acb);
	return(0);
}
/*
*******************************************************************************
*******************************************************************************
*/
static int arcmsr_resume(device_t dev)
{
	struct AdapterControlBlock	*acb = device_get_softc(dev);

	arcmsr_iop_init(acb);
	return(0);
}
/*
*********************************************************************************
*********************************************************************************
*/
static void arcmsr_async(void *cb_arg, u_int32_t code, struct cam_path *path, void *arg)
{
	struct AdapterControlBlock *acb;
	u_int8_t target_id, target_lun;
	struct cam_sim * sim;

	sim=(struct cam_sim *) cb_arg;
	acb =(struct AdapterControlBlock *) cam_sim_softc(sim);
	switch (code) {
	case AC_LOST_DEVICE:
		target_id=xpt_path_target_id(path);
		target_lun=xpt_path_lun_id(path);
		if((target_id > ARCMSR_MAX_TARGETID) || (target_lun > ARCMSR_MAX_TARGETLUN)) {
			break;
		}
		printf("%s:scsi id%d lun%d device lost \n"
			, device_get_name(acb->pci_dev), target_id, target_lun);
		break;
	default:
		break;
	}
}
/*
************************************************************************
************************************************************************
*/
static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
{
	CHIP_REG_WRITE32(inbound_msgaddr0, ARCMSR_INBOUND_MESG0_FLUSH_CACHE);
	if(arcmsr_wait_msgint_ready(acb)) {
		printf("arcmsr%d: wait 'flush adapter cache' timeout \n"
			, acb->pci_unit);
	}
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static u_int8_t arcmsr_wait_msgint_ready(struct AdapterControlBlock *acb)
{
	u_int32_t Index;
	u_int8_t Retries=0x00;

	do {
		for(Index=0; Index < 100; Index++) {
			if(CHIP_REG_READ32(outbound_intstatus) & ARCMSR_MU_OUTBOUND_MESSAGE0_INT) {
				/*clear interrupt*/
				CHIP_REG_WRITE32(outbound_intstatus, ARCMSR_MU_OUTBOUND_MESSAGE0_INT);
				return 0x00;
			}
			/* one us delay	*/
			UDELAY(10000);
		}/*max 1 seconds*/
	}while(Retries++ < 20);/*max 20 sec*/
	return 0xff;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_srb_complete(struct CommandControlBlock *srb, int stand_flag)
{
	struct AdapterControlBlock *acb=srb->acb;
	union ccb * pccb=srb->pccb;

	if((pccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
		bus_dmasync_op_t op;

		if((pccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
			op = BUS_DMASYNC_POSTREAD;
		} else {
			op = BUS_DMASYNC_POSTWRITE;
		}
		bus_dmamap_sync(acb->dm_segs_dmat, srb->dm_segs_dmamap, op);
		bus_dmamap_unload(acb->dm_segs_dmat, srb->dm_segs_dmamap);
	}
	ARCMSR_LOCK_ACQUIRE(&acb->workingQ_done_lock);
	if(stand_flag==1) {
		atomic_subtract_int(&acb->srboutstandingcount, 1);
		if((acb->acb_flags & ACB_F_CAM_DEV_QFRZN) && (
		acb->srboutstandingcount < ARCMSR_RELEASE_SIMQ_LEVEL)) {
			acb->acb_flags &= ~ACB_F_CAM_DEV_QFRZN;
			pccb->ccb_h.status |= CAM_RELEASE_SIMQ;
		}
	}
	srb->startdone=ARCMSR_SRB_DONE;
	srb->srb_flags=0;
	acb->srbworkingQ[acb->workingsrb_doneindex]=srb;
	acb->workingsrb_doneindex++;
	acb->workingsrb_doneindex %= ARCMSR_MAX_FREESRB_NUM;
	ARCMSR_LOCK_RELEASE(&acb->workingQ_done_lock);
	xpt_done(pccb);
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_report_sense_info(struct CommandControlBlock *srb)
{
	union ccb * pccb=srb->pccb;

	pccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
	pccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
	if(&pccb->csio.sense_data) {
		memset(&pccb->csio.sense_data, 0, sizeof(pccb->csio.sense_data));
		memcpy(&pccb->csio.sense_data, srb->arcmsr_cdb.SenseData, 
		get_min(sizeof(struct SENSE_DATA), sizeof(pccb->csio.sense_data)));
		((u_int8_t *)&pccb->csio.sense_data)[0] = (0x1 << 7 | 0x70); /* Valid,ErrorCode */
		pccb->ccb_h.status |= CAM_AUTOSNS_VALID;
	}
	return;
}
/*
*********************************************************************
** 
*********************************************************************
*/
static void arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
{
	CHIP_REG_WRITE32(inbound_msgaddr0, ARCMSR_INBOUND_MESG0_ABORT_CMD);
	if(arcmsr_wait_msgint_ready(acb)) {
		printf("arcmsr%d: wait 'abort all outstanding command' timeout \n"
			, acb->pci_unit);
	}
	return;
}
/*
****************************************************************************
****************************************************************************
*/
static void arcmsr_iop_reset(struct AdapterControlBlock *acb)
{
	struct CommandControlBlock *srb;
	u_int32_t intmask_org, mask;
	u_int32_t i=0;

	if(acb->srboutstandingcount!=0)
	{
		/* talk to iop 331 outstanding command aborted*/
		arcmsr_abort_allcmd(acb);
		UDELAY(3000*1000);/*wait for 3 sec for all command aborted*/
		/* disable all outbound interrupt */
		intmask_org=CHIP_REG_READ32(outbound_intmask);
		CHIP_REG_WRITE32(outbound_intmask
			, intmask_org|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE);
		/*clear all outbound posted Q*/
		for(i=0;i<ARCMSR_MAX_OUTSTANDING_CMD;i++) {
			CHIP_REG_READ32(outbound_queueport);
		}
		for(i=0;i<ARCMSR_MAX_FREESRB_NUM;i++) {
			srb=acb->psrb_pool[i];
			if(srb->startdone==ARCMSR_SRB_START) {
				srb->startdone=ARCMSR_SRB_ABORTED;
				srb->pccb->ccb_h.status |= CAM_REQ_ABORTED;
				arcmsr_srb_complete(srb, 1);
			}
		}
		/* enable all outbound interrupt */
		mask=~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE
			|ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
		CHIP_REG_WRITE32(outbound_intmask, intmask_org & mask);
		/* post abort all outstanding command message to RAID controller */
	}
	atomic_set_int(&acb->srboutstandingcount, 0);
	acb->workingsrb_doneindex=0;
	acb->workingsrb_startindex=0;
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_build_srb(struct CommandControlBlock *srb, bus_dma_segment_t *dm_segs, u_int32_t nseg)
{
	struct ARCMSR_CDB * arcmsr_cdb= &srb->arcmsr_cdb;
	u_int8_t * psge=(u_int8_t *)&arcmsr_cdb->u;
	u_int32_t address_lo, address_hi;
	union ccb * pccb=srb->pccb;
	struct ccb_scsiio * pcsio= &pccb->csio;
	u_int32_t arccdbsize=0x30;

	memset(arcmsr_cdb, 0, sizeof(struct ARCMSR_CDB));
	arcmsr_cdb->Bus=0;
	arcmsr_cdb->TargetID=pccb->ccb_h.target_id;
	arcmsr_cdb->LUN=pccb->ccb_h.target_lun;
	arcmsr_cdb->Function=1;
	arcmsr_cdb->CdbLength=(u_int8_t)pcsio->cdb_len;
	arcmsr_cdb->Context=(unsigned long)arcmsr_cdb;
	bcopy(pcsio->cdb_io.cdb_bytes, arcmsr_cdb->Cdb, pcsio->cdb_len);
	if(nseg != 0) {
		struct AdapterControlBlock *acb=srb->acb;
		bus_dmasync_op_t op;	
		u_int32_t length, i, cdb_sgcount=0;

		if((pccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
			op=BUS_DMASYNC_PREREAD;
		} else {
			op=BUS_DMASYNC_PREWRITE;
			arcmsr_cdb->Flags|=ARCMSR_CDB_FLAG_WRITE;
			srb->srb_flags|=SRB_FLAG_WRITE;
		}
		bus_dmamap_sync(acb->dm_segs_dmat, srb->dm_segs_dmamap, op);
		for(i=0;i<nseg;i++) {
			/* Get the physical address of the current data pointer */
			length=arcmsr_htole32(dm_segs[i].ds_len);
			address_lo=arcmsr_htole32(dma_addr_lo32(dm_segs[i].ds_addr));
			address_hi=arcmsr_htole32(dma_addr_hi32(dm_segs[i].ds_addr));
			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 {
				u_int32_t sg64s_size=0, tmplength=length;

				while(1) {
					u_int64_t span4G, length0;
					struct SG64ENTRY * pdma_sg=(struct SG64ENTRY *)psge;

					span4G=(u_int64_t)address_lo + tmplength;
					pdma_sg->addresshigh=address_hi;
					pdma_sg->address=address_lo;
					if(span4G > 0x100000000) {
						/*see if cross 4G boundary*/
						length0=0x100000000-address_lo;
						pdma_sg->length=(u_int32_t)length0|IS_SG64_ADDR;
						address_hi=address_hi+1;
						address_lo=0;
						tmplength=tmplength-(u_int32_t)length0;
						sg64s_size += sizeof(struct SG64ENTRY);
						psge += sizeof(struct SG64ENTRY);
						cdb_sgcount++;
					} else {
    						pdma_sg->length=tmplength|IS_SG64_ADDR;
						sg64s_size += sizeof(struct SG64ENTRY);
						psge += sizeof(struct SG64ENTRY);
						break;
					}
				}
				arccdbsize += sg64s_size;
			}
			cdb_sgcount++;
		}
		arcmsr_cdb->sgcount=(u_int8_t)cdb_sgcount;
		arcmsr_cdb->DataLength=pcsio->dxfer_len;
		if( arccdbsize > 256) {
			arcmsr_cdb->Flags|=ARCMSR_CDB_FLAG_SGL_BSIZE;
		}
	}
    return;
}
/*
**************************************************************************
**************************************************************************
*/ 
static void arcmsr_post_srb(struct AdapterControlBlock *acb, struct CommandControlBlock *srb)
{
	u_int32_t cdb_shifted_phyaddr=(u_int32_t) srb->cdb_shifted_phyaddr;
	struct ARCMSR_CDB * arcmsr_cdb=(struct ARCMSR_CDB *)&srb->arcmsr_cdb;

	bus_dmamap_sync(acb->srb_dmat, acb->srb_dmamap, 
	(srb->srb_flags & SRB_FLAG_WRITE) ? BUS_DMASYNC_POSTWRITE:BUS_DMASYNC_POSTREAD);
	atomic_add_int(&acb->srboutstandingcount, 1);
	srb->startdone=ARCMSR_SRB_START;
	if(arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE) {
	    CHIP_REG_WRITE32(inbound_queueport, cdb_shifted_phyaddr|ARCMSR_SRBPOST_FLAG_SGL_BSIZE);
	} else {
	    CHIP_REG_WRITE32(inbound_queueport, cdb_shifted_phyaddr);
	}
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_post_Qbuffer(struct AdapterControlBlock *acb)
{
	u_int8_t * pQbuffer;
	struct QBUFFER * pwbuffer=(struct QBUFFER *)&acb->pmu->message_wbuffer;
	u_int8_t * iop_data=(u_int8_t *)pwbuffer->data;
	u_int32_t allxfer_len=0;

	if(acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
		acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
		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; 
			/*if last index number set it to 0 */
			iop_data++;
			allxfer_len++;
		}
		pwbuffer->data_len=allxfer_len;
		/*
		** push inbound doorbell and wait reply at hwinterrupt routine for next Qbuffer post
		*/
		CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK);
	}
	return;
}
/*
************************************************************************
************************************************************************
*/
static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb)
{
	acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
	CHIP_REG_WRITE32(inbound_msgaddr0, ARCMSR_INBOUND_MESG0_STOP_BGRB);
	if(arcmsr_wait_msgint_ready(acb)) {
		printf("arcmsr%d: wait 'stop adapter rebulid' timeout \n"
			, acb->pci_unit);
	}
	return;
}
/*
************************************************************************
************************************************************************
*/
static void arcmsr_poll(struct cam_sim * psim)
{
	arcmsr_interrupt(cam_sim_softc(psim));
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_interrupt(void *arg)
{
	struct AdapterControlBlock *acb=(struct AdapterControlBlock *)arg;
	struct CommandControlBlock *srb;
	u_int32_t flag_srb, outbound_intstatus, outbound_doorbell;

	/*
	*********************************************
	**   check outbound intstatus 
	*********************************************
	*/
	outbound_intstatus=CHIP_REG_READ32(outbound_intstatus) & acb->outbound_int_enable;
	CHIP_REG_WRITE32(outbound_intstatus, outbound_intstatus);/*clear interrupt*/
	if(outbound_intstatus & ARCMSR_MU_OUTBOUND_DOORBELL_INT) {
		/*
		*********************************************
		**  DOORBELL 
		*********************************************
		*/
		outbound_doorbell=CHIP_REG_READ32(outbound_doorbell);
		CHIP_REG_WRITE32(outbound_doorbell, outbound_doorbell);/*clear interrupt */
		if(outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK) {
			struct QBUFFER * prbuffer=(struct QBUFFER *)&acb->pmu->message_rbuffer;
			u_int8_t * iop_data=(u_int8_t *)prbuffer->data;
			u_int8_t * pQbuffer;
			u_int32_t my_empty_len, iop_len, rqbuf_firstindex, rqbuf_lastindex;

			/*check this iop data if overflow my rqbuffer*/
			rqbuf_lastindex=acb->rqbuf_lastindex;
			rqbuf_firstindex=acb->rqbuf_firstindex;
			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= &acb->rqbuffer[acb->rqbuf_lastindex];
					memcpy(pQbuffer, iop_data, 1);
					acb->rqbuf_lastindex++;
					acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
					/*if last index number set it to 0 */
					iop_data++;
					iop_len--;
				}
				CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
				/*signature, let IOP331 know data has been readed */
			} else {
				acb->acb_flags|=ACB_F_IOPDATA_OVERFLOW;
			}
		}
		if(outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_READ_OK) {
			acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
			/*
			*********************************************
			*********************************************
			*/
			if(acb->wqbuf_firstindex!=acb->wqbuf_lastindex) {
				u_int8_t * pQbuffer;
				struct QBUFFER * pwbuffer=(struct QBUFFER *)&acb->pmu->message_wbuffer;
				u_int8_t * iop_data=(u_int8_t *)pwbuffer->data;
				u_int32_t allxfer_len=0;

				acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
				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; 
					/*if last index number set it to 0 */
					iop_data++;
					allxfer_len++;
				}
				pwbuffer->data_len=allxfer_len;
				/*
				** push inbound doorbell tell iop driver data write ok
				** and wait reply on next hwinterrupt for next Qbuffer post
				*/
				CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK);
 			}
			if(acb->wqbuf_firstindex==acb->wqbuf_lastindex) {
				acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
			}
		}
	}
	if(outbound_intstatus & ARCMSR_MU_OUTBOUND_POSTQUEUE_INT) {
		int target, lun;
 		/*
		*****************************************************************************
		**               areca cdb command done
		*****************************************************************************
		*/
		bus_dmamap_sync(acb->srb_dmat, acb->srb_dmamap, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
		while(1) {
			if((flag_srb=CHIP_REG_READ32(outbound_queueport)) == 0xFFFFFFFF) {
				break;/*chip FIFO no srb for completion already*/
			}
			/* check if command done with no error*/
			srb=(struct CommandControlBlock *)(acb->vir2phy_offset+(flag_srb << 5));
			/*frame must be 32 bytes aligned*/
			if((srb->acb!=acb) || (srb->startdone!=ARCMSR_SRB_START)) {
				if(srb->startdone==ARCMSR_SRB_ABORTED) {
					printf("arcmsr%d: srb='%p' isr got aborted command \n"
						, acb->pci_unit, srb);
					srb->pccb->ccb_h.status |= CAM_REQ_ABORTED;
					arcmsr_srb_complete(srb, 1);
					continue;
				}
				printf("arcmsr%d: isr get an illegal srb command done"
					"acb='%p' srb='%p' srbacb='%p' startdone=0x%x"
					"srboutstandingcount=%d \n",
					acb->pci_unit, acb, srb, srb->acb,
					srb->startdone, acb->srboutstandingcount);
				continue;
			}
			target=srb->pccb->ccb_h.target_id;
			lun=srb->pccb->ccb_h.target_lun;
			if((flag_srb & ARCMSR_SRBREPLY_FLAG_ERROR)==0) {
				if(acb->devstate[target][lun]==ARECA_RAID_GONE) {
					acb->devstate[target][lun]=ARECA_RAID_GOOD;
				}
				srb->pccb->ccb_h.status |= CAM_REQ_CMP;
				arcmsr_srb_complete(srb, 1);
			} else {
				switch(srb->arcmsr_cdb.DeviceStatus) {
				case ARCMSR_DEV_SELECT_TIMEOUT: {
						acb->devstate[target][lun]=ARECA_RAID_GONE;
 						srb->pccb->ccb_h.status |= CAM_SEL_TIMEOUT;
						arcmsr_srb_complete(srb, 1);
					}
					break;
				case ARCMSR_DEV_ABORTED:
				case ARCMSR_DEV_INIT_FAIL: {
						acb->devstate[target][lun]=ARECA_RAID_GONE;
 						srb->pccb->ccb_h.status |= CAM_DEV_NOT_THERE;
						arcmsr_srb_complete(srb, 1);
					}
					break;
				case SCSISTAT_CHECK_CONDITION: {
						acb->devstate[target][lun]=ARECA_RAID_GOOD;
						arcmsr_report_sense_info(srb);
						arcmsr_srb_complete(srb, 1);
					}
					break;
				default:
					printf("arcmsr%d: scsi id=%d lun=%d"
						"isr get command error done,"
						"but got unknow DeviceStatus=0x%x \n"
						, acb->pci_unit, target, lun 
						,srb->arcmsr_cdb.DeviceStatus);
					acb->devstate[target][lun]=ARECA_RAID_GONE;
					srb->pccb->ccb_h.status |= CAM_UNCOR_PARITY;
					/*unknow error or crc error just for retry*/
					arcmsr_srb_complete(srb, 1);
					break;
				}
			}
		}	/*drain reply FIFO*/
	}
 	return;
}
/*
*******************************************************************************
**
*******************************************************************************
*/
static void arcmsr_iop_parking(struct AdapterControlBlock *acb)
{
	if(acb!=NULL) {
		/* stop adapter background rebuild */
		if(acb->acb_flags & ACB_F_MSG_START_BGRB) {
			arcmsr_stop_adapter_bgrb(acb);
			arcmsr_flush_adapter_cache(acb);
		}
	}
}
/*
***********************************************************************
**
************************************************************************
*/
u_int32_t arcmsr_iop_ioctlcmd(struct AdapterControlBlock *acb, u_int32_t ioctl_cmd, caddr_t arg)
{
	struct CMD_MESSAGE_FIELD * pcmdmessagefld;
	u_int32_t retvalue=EINVAL;

	pcmdmessagefld=(struct CMD_MESSAGE_FIELD *) arg;
	if(memcmp(pcmdmessagefld->cmdmessage.Signature, "ARCMSR", 6)!=0) {
		return retvalue;
	}
	ARCMSR_LOCK_ACQUIRE(&acb->qbuffer_lock);
	switch(ioctl_cmd) {
	case ARCMSR_MESSAGE_READ_RQBUFFER: {
			u_int8_t * pQbuffer;
			u_int8_t * ptmpQbuffer=pcmdmessagefld->messagedatabuffer;			
			u_int32_t allxfer_len=0;

			while((acb->rqbuf_firstindex!=acb->rqbuf_lastindex) && (allxfer_len<1031)) {
				/*copy READ QBUFFER to srb*/
				pQbuffer= &acb->rqbuffer[acb->rqbuf_firstindex];
				memcpy(ptmpQbuffer, pQbuffer, 1);
				acb->rqbuf_firstindex++;
				acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER; 
				/*if last index number set it to 0 */
				ptmpQbuffer++;
				allxfer_len++;
			}
			if(acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
				struct QBUFFER * prbuffer=(struct QBUFFER *)&acb->pmu->message_rbuffer;
				u_int8_t * iop_data=(u_int8_t *)prbuffer->data;
				u_int32_t iop_len;

				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				iop_len=(u_int32_t)prbuffer->data_len;
				/*this iop data does no chance to make me overflow again here, so just do it*/
				while(iop_len>0) {
					pQbuffer= &acb->rqbuffer[acb->rqbuf_lastindex];
					memcpy(pQbuffer, iop_data, 1);
					acb->rqbuf_lastindex++;
					acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
					/*if last index number set it to 0 */
					iop_data++;
					iop_len--;
				}
				CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
				/*signature, let IOP331 know data has been readed */
			}
			pcmdmessagefld->cmdmessage.Length=allxfer_len;
			pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_OK;
			retvalue=ARCMSR_MESSAGE_SUCCESS;
 		}
		break;
	case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
			u_int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
			u_int8_t * pQbuffer;
			u_int8_t * ptmpuserbuffer=pcmdmessagefld->messagedatabuffer;

			user_len=pcmdmessagefld->cmdmessage.Length;
			/*check if data xfer length of this request will overflow my array qbuffer */
			wqbuf_lastindex=acb->wqbuf_lastindex;
			wqbuf_firstindex=acb->wqbuf_firstindex;
			if(wqbuf_lastindex!=wqbuf_firstindex) {
				arcmsr_post_Qbuffer(acb);
				pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_ERROR;
			} else {
				my_empty_len=(wqbuf_firstindex-wqbuf_lastindex-1)&(ARCMSR_MAX_QBUFFER-1);
				if(my_empty_len>=user_len) {
					while(user_len>0) {
						/*copy srb data to wqbuffer*/
						pQbuffer= &acb->wqbuffer[acb->wqbuf_lastindex];
						memcpy(pQbuffer, ptmpuserbuffer, 1);
						acb->wqbuf_lastindex++;
						acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
						/*if last index number set it to 0 */
 						ptmpuserbuffer++;
						user_len--;
					}
					/*post fist Qbuffer*/
					if(acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
						acb->acb_flags &=~ACB_F_MESSAGE_WQBUFFER_CLEARED;
 						arcmsr_post_Qbuffer(acb);
					}
					pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_OK;
				} else {
					pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_ERROR;
				}
			}
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	case ARCMSR_MESSAGE_CLEAR_RQBUFFER: {
			u_int8_t * pQbuffer=acb->rqbuffer;

			if(acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
				/*signature, let IOP331 know data has been readed */
			}
			acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
			acb->rqbuf_firstindex=0;
			acb->rqbuf_lastindex=0;
			memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
			pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_OK;
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	case ARCMSR_MESSAGE_CLEAR_WQBUFFER:
		{
			u_int8_t * pQbuffer=acb->wqbuffer;
 
			if(acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
				/*signature, let IOP331 know data has been readed */
			}
			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);
			pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_OK;
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	case ARCMSR_MESSAGE_CLEAR_ALLQBUFFER: {
			u_int8_t * pQbuffer;
 
			if(acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
				/*signature, let IOP331 know data has been readed */
			}
			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));
			pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_OK;
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	case ARCMSR_MESSAGE_REQUEST_RETURNCODE_3F: {
			pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_3F;
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	case ARCMSR_MESSAGE_SAY_HELLO: {
			u_int8_t * hello_string="Hello! I am ARCMSR";
			u_int8_t * puserbuffer=(u_int8_t *)pcmdmessagefld->messagedatabuffer;
  
			if(memcpy(puserbuffer, hello_string, (int16_t)strlen(hello_string))) {
				pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_ERROR;
				ARCMSR_LOCK_RELEASE(&acb->qbuffer_lock);
				return ENOIOCTL;
			}
			pcmdmessagefld->cmdmessage.ReturnCode=ARCMSR_MESSAGE_RETURNCODE_OK;
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	case ARCMSR_MESSAGE_SAY_GOODBYE: {
			arcmsr_iop_parking(acb);
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
    case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE: {
			arcmsr_flush_adapter_cache(acb);
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	}
	ARCMSR_LOCK_RELEASE(&acb->qbuffer_lock);
	return retvalue;
}
/*
**************************************************************************
**************************************************************************
*/
struct CommandControlBlock * arcmsr_get_freesrb(struct AdapterControlBlock *acb)
{
	struct CommandControlBlock *srb=NULL;
	u_int32_t workingsrb_startindex, workingsrb_doneindex;

	ARCMSR_LOCK_ACQUIRE(&acb->workingQ_start_lock);
	workingsrb_doneindex=acb->workingsrb_doneindex;
	workingsrb_startindex=acb->workingsrb_startindex;
	srb=acb->srbworkingQ[workingsrb_startindex];
	workingsrb_startindex++;
	workingsrb_startindex %= ARCMSR_MAX_FREESRB_NUM;
	if(workingsrb_doneindex!=workingsrb_startindex) {
		acb->workingsrb_startindex=workingsrb_startindex;
	} else {
		srb=NULL;
	}
	ARCMSR_LOCK_RELEASE(&acb->workingQ_start_lock);
	return(srb);
}
/*
**************************************************************************
**************************************************************************
*/
static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, union ccb * pccb)
{
	struct CMD_MESSAGE_FIELD * pcmdmessagefld;
	int retvalue = 0, transfer_len = 0;
	char *buffer;
	uint32_t controlcode = (uint32_t ) pccb->csio.cdb_io.cdb_bytes[5] << 24 |
						(uint32_t ) pccb->csio.cdb_io.cdb_bytes[6] << 16 |
						(uint32_t ) pccb->csio.cdb_io.cdb_bytes[7] << 8  |
						(uint32_t ) pccb->csio.cdb_io.cdb_bytes[8];
					/* 4 bytes: Areca io control code */
	if((pccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
		buffer = pccb->csio.data_ptr;
		transfer_len = pccb->csio.dxfer_len;
	} else {
		retvalue = ARCMSR_MESSAGE_FAIL;
		goto message_out;
	}
	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: {
			u_int8_t *pQbuffer;
			u_int8_t *ptmpQbuffer=pcmdmessagefld->messagedatabuffer;
			int32_t allxfer_len = 0;
	
			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  *prbuffer = (struct QBUFFER  *) &acb->pmu->message_rbuffer;
				u_int8_t  *iop_data = (u_int8_t *)prbuffer->data;
				int32_t iop_len;
	
				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				iop_len =(u_int32_t)prbuffer->data_len;
				while (iop_len > 0) {
			        pQbuffer= &acb->rqbuffer[acb->rqbuf_lastindex];
					memcpy(pQbuffer, iop_data, 1);
					acb->rqbuf_lastindex++;
					acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
					iop_data++;
					iop_len--;
				}
				CHIP_REG_WRITE32(inbound_doorbell, 
						ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
			}
			pcmdmessagefld->cmdmessage.Length = allxfer_len;
			pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
			retvalue=ARCMSR_MESSAGE_SUCCESS;
		}
		break;
	case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
			int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
			u_int8_t *pQbuffer;
			u_int8_t *ptmpuserbuffer=pcmdmessagefld->messagedatabuffer;

			user_len = pcmdmessagefld->cmdmessage.Length;
			wqbuf_lastindex = acb->wqbuf_lastindex;
			wqbuf_firstindex = acb->wqbuf_firstindex;
			if (wqbuf_lastindex != wqbuf_firstindex) {
				arcmsr_post_Qbuffer(acb);
				/* has error report sensedata */
			    if(&pccb->csio.sense_data) {
				((u_int8_t *)&pccb->csio.sense_data)[0] = (0x1 << 7 | 0x70); 
				/* Valid,ErrorCode */
				((u_int8_t *)&pccb->csio.sense_data)[2] = 0x05; 
				/* FileMark,EndOfMedia,IncorrectLength,Reserved,SenseKey */
				((u_int8_t *)&pccb->csio.sense_data)[7] = 0x0A; 
				/* AdditionalSenseLength */
				((u_int8_t *)&pccb->csio.sense_data)[12] = 0x20; 
				/* AdditionalSenseCode */
				}
				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_Qbuffer(acb);
					}
				} else {
					/* has error report sensedata */
					if(&pccb->csio.sense_data) {
					((u_int8_t *)&pccb->csio.sense_data)[0] = (0x1 << 7 | 0x70);
					/* Valid,ErrorCode */
					((u_int8_t *)&pccb->csio.sense_data)[2] = 0x05; 
					/* FileMark,EndOfMedia,IncorrectLength,Reserved,SenseKey */
					((u_int8_t *)&pccb->csio.sense_data)[7] = 0x0A; 
					/* AdditionalSenseLength */
					((u_int8_t *)&pccb->csio.sense_data)[12] = 0x20; 
					/* AdditionalSenseCode */
					}
					retvalue = ARCMSR_MESSAGE_FAIL;
				}
			}
		}
		break;
	case ARCMSR_MESSAGE_CLEAR_RQBUFFER: {
			u_int8_t *pQbuffer = acb->rqbuffer;
	
			if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				CHIP_REG_WRITE32(inbound_doorbell
					, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
			}
			acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
			acb->rqbuf_firstindex = 0;
			acb->rqbuf_lastindex = 0;
			memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
			pcmdmessagefld->cmdmessage.ReturnCode =
			ARCMSR_MESSAGE_RETURNCODE_OK;
		}
		break;
	case ARCMSR_MESSAGE_CLEAR_WQBUFFER: {
			u_int8_t *pQbuffer = acb->wqbuffer;
	
			if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				CHIP_REG_WRITE32(inbound_doorbell
						, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
			}
			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);
			pcmdmessagefld->cmdmessage.ReturnCode =
				ARCMSR_MESSAGE_RETURNCODE_OK;
		}
		break;
	case ARCMSR_MESSAGE_CLEAR_ALLQBUFFER: {
			u_int8_t *pQbuffer;
	
			if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
				CHIP_REG_WRITE32(inbound_doorbell
						, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
			}
			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));
			pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
		}
		break;
	case ARCMSR_MESSAGE_REQUEST_RETURNCODE_3F: {
			pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_3F;
		}
		break;
	case ARCMSR_MESSAGE_SAY_HELLO: {
			int8_t * hello_string = "Hello! I am ARCMSR";
	
			memcpy(pcmdmessagefld->messagedatabuffer, hello_string
				, (int16_t)strlen(hello_string));
			pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
		}
		break;
	case ARCMSR_MESSAGE_SAY_GOODBYE:
		arcmsr_iop_parking(acb);
		break;
	case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE:
		arcmsr_flush_adapter_cache(acb);
		break;
	default:
		retvalue = ARCMSR_MESSAGE_FAIL;
	}
message_out:
	return retvalue;
}
/*
*********************************************************************
*********************************************************************
*/
static void arcmsr_executesrb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
{
	struct CommandControlBlock *srb=(struct CommandControlBlock *)arg;
	struct AdapterControlBlock *acb=(struct AdapterControlBlock *)srb->acb;
	union ccb * pccb;
	int target, lun; 

	pccb=srb->pccb;
	target=pccb->ccb_h.target_id;
	lun=pccb->ccb_h.target_lun;
	if(error != 0) {
		if(error != EFBIG) {
			printf("arcmsr%d: unexpected error %x returned from 'bus_dmamap_load' \n"
				, acb->pci_unit, error);
		}
		if((pccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG) {
			pccb->ccb_h.status |= CAM_REQ_TOO_BIG;
		}
		arcmsr_srb_complete(srb, 0);
		return;
	}
	if(nseg > ARCMSR_MAX_SG_ENTRIES) {
		pccb->ccb_h.status |= CAM_REQ_TOO_BIG;
		arcmsr_srb_complete(srb, 0);
		return;
	}
 	if(acb->acb_flags & ACB_F_BUS_RESET) {
		printf("arcmsr%d: bus reset and return busy \n", acb->pci_unit);
		pccb->ccb_h.status |= CAM_SCSI_BUS_RESET;
		arcmsr_srb_complete(srb, 0);
		return;
	}
	if(acb->devstate[target][lun]==ARECA_RAID_GONE) {
		u_int8_t block_cmd;

		block_cmd=pccb->csio.cdb_io.cdb_bytes[0] & 0x0f;
		if(block_cmd==0x08 || block_cmd==0x0a) {
			printf("arcmsr%d:block 'read/write' command"
				"with gone raid volume Cmd=%2x, TargetId=%d, Lun=%d \n"
				, acb->pci_unit, block_cmd, target, lun);
			pccb->ccb_h.status |= CAM_DEV_NOT_THERE;
			arcmsr_srb_complete(srb, 0);
			return;
		}
	}
	if((pccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
		if(nseg != 0) {
			bus_dmamap_unload(acb->dm_segs_dmat, srb->dm_segs_dmamap);
		}
		arcmsr_srb_complete(srb, 0);
		return;
	}
	if(acb->srboutstandingcount >= ARCMSR_MAX_OUTSTANDING_CMD) {
		xpt_freeze_simq(acb->psim, 1);
		pccb->ccb_h.status = CAM_REQUEUE_REQ;
		acb->acb_flags |= ACB_F_CAM_DEV_QFRZN;
		arcmsr_srb_complete(srb, 0);
		return;
	}
	pccb->ccb_h.status |= CAM_SIM_QUEUED;
	arcmsr_build_srb(srb, dm_segs, nseg);
	arcmsr_post_srb(acb, srb);
	return;
}
/*
*****************************************************************************************
*****************************************************************************************
*/
static u_int8_t arcmsr_seek_cmd2abort(union ccb * abortccb)
{
	struct CommandControlBlock *srb;
	struct AdapterControlBlock *acb=(struct AdapterControlBlock *) abortccb->ccb_h.arcmsr_ccbacb_ptr;
	u_int32_t intmask_org, mask;
	int i=0;

	acb->num_aborts++;
	/*
	***************************************************************************
	** It is the upper layer do abort command this lock just prior to calling us.
	** First determine if we currently own this command.
	** Start by searching the device queue. If not found
	** at all, and the system wanted us to just abort the
	** command return success.
	***************************************************************************
	*/
	if(acb->srboutstandingcount!=0) {
		for(i=0;i<ARCMSR_MAX_FREESRB_NUM;i++) {
			srb=acb->psrb_pool[i];
			if(srb->startdone==ARCMSR_SRB_START) {
				if(srb->pccb==abortccb) {
					srb->startdone=ARCMSR_SRB_ABORTED;
					printf("arcmsr%d:scsi id=%d lun=%d abort srb '%p'"
						"outstanding command \n"
						, acb->pci_unit, abortccb->ccb_h.target_id
						, abortccb->ccb_h.target_lun, srb);
					goto abort_outstanding_cmd;
				}
			}
		}
	}
	return(FALSE);
abort_outstanding_cmd:
	/* do not talk to iop 331 abort command */
	UDELAY(3000*1000);/*wait for 3 sec for all command done*/
	/* disable all outbound interrupt */
	intmask_org=CHIP_REG_READ32(outbound_intmask);
	CHIP_REG_WRITE32(outbound_intmask, intmask_org|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE);
	arcmsr_polling_srbdone(acb, srb);
	/* enable all outbound interrupt */
	mask=~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE|ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
	CHIP_REG_WRITE32(outbound_intmask, intmask_org & mask);
	return (TRUE);
}
/*
****************************************************************************
****************************************************************************
*/
static void arcmsr_bus_reset(struct AdapterControlBlock *acb)
{
	int retry=0;

	acb->num_resets++;
	acb->acb_flags |=ACB_F_BUS_RESET;
	while(acb->srboutstandingcount!=0 && retry < 400) {
		arcmsr_interrupt((void *)acb);
		UDELAY(25000);
		retry++;
	}
	arcmsr_iop_reset(acb);
	acb->acb_flags &= ~ACB_F_BUS_RESET;
	return;
} 
/*
**************************************************************************
**************************************************************************
*/
static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb,
		union ccb * pccb)
{
	pccb->ccb_h.status |= CAM_REQ_CMP;
	switch (pccb->csio.cdb_io.cdb_bytes[0]) {
	case INQUIRY: {
		unsigned char inqdata[36];
		char *buffer=pccb->csio.data_ptr;;
	
		if (pccb->ccb_h.target_lun) {
			pccb->ccb_h.status |= CAM_SEL_TIMEOUT;
			xpt_done(pccb);
			return;
		}
		inqdata[0] = T_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 */
		memcpy(buffer, inqdata, sizeof(inqdata));
		xpt_done(pccb);
	}
	break;
	case WRITE_BUFFER:
	case READ_BUFFER: {
		if (arcmsr_iop_message_xfer(acb, pccb)) {
			pccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
			pccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
		}
		xpt_done(pccb);
	}
	break;
	default:
		xpt_done(pccb);
	}
}
/*
*********************************************************************
*********************************************************************
*/
static void arcmsr_action(struct cam_sim * psim, union ccb * pccb)
{
	struct AdapterControlBlock *  acb;

	acb=(struct AdapterControlBlock *) cam_sim_softc(psim);
	if(acb==NULL) {
		pccb->ccb_h.status |= CAM_REQ_INVALID;
		xpt_done(pccb);
		return;
	}
	switch (pccb->ccb_h.func_code) {
	case XPT_SCSI_IO: {
			struct CommandControlBlock *srb;
			int target=pccb->ccb_h.target_id;

			if(target == 16) {
				/* virtual device for iop message transfer */
				arcmsr_handle_virtual_command(acb, pccb);
				return;
			}
 			if((srb=arcmsr_get_freesrb(acb)) == NULL) {
				pccb->ccb_h.status |= CAM_RESRC_UNAVAIL;
				xpt_done(pccb);
				return;
			}
 			pccb->ccb_h.arcmsr_ccbsrb_ptr=srb;
			pccb->ccb_h.arcmsr_ccbacb_ptr=acb;
			srb->pccb=pccb;
			if((pccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
				if(!(pccb->ccb_h.flags & CAM_SCATTER_VALID)) {
					/* Single buffer */
					if(!(pccb->ccb_h.flags & CAM_DATA_PHYS)) {
						/* Buffer is virtual */
						u_int32_t error, s;

						s=splsoftvm();
						error =	bus_dmamap_load(acb->dm_segs_dmat
							, srb->dm_segs_dmamap
							, pccb->csio.data_ptr
							, pccb->csio.dxfer_len
							, arcmsr_executesrb, srb, /*flags*/0);
	         				if(error == EINPROGRESS) {
							xpt_freeze_simq(acb->psim, 1);
							pccb->ccb_h.status |= CAM_RELEASE_SIMQ;
						}
						splx(s);
					} else { 
						/* Buffer is physical */
						panic("arcmsr: CAM_DATA_PHYS not supported");
					}
				} else { 
					/* Scatter/gather list */
					struct bus_dma_segment *segs;

					if((pccb->ccb_h.flags & CAM_SG_LIST_PHYS) == 0
					|| (pccb->ccb_h.flags & CAM_DATA_PHYS) != 0) {
						pccb->ccb_h.status |= CAM_PROVIDE_FAIL;
						xpt_done(pccb);
						free(srb, M_DEVBUF);
						return;
					}
					segs=(struct bus_dma_segment *)pccb->csio.data_ptr;
					arcmsr_executesrb(srb, segs, pccb->csio.sglist_cnt, 0);
				}
			} else {
				arcmsr_executesrb(srb, NULL, 0, 0);
			}
			break;
		}
	case XPT_TARGET_IO: {
			/* target mode not yet support vendor specific commands. */
			pccb->ccb_h.status |= CAM_REQ_CMP;
			xpt_done(pccb);
			break;
		}
	case XPT_PATH_INQ: {
			struct ccb_pathinq *cpi= &pccb->cpi;

			cpi->version_num=1;
			cpi->hba_inquiry=PI_SDTR_ABLE | PI_TAG_ABLE;
			cpi->target_sprt=0;
			cpi->hba_misc=0;
			cpi->hba_eng_cnt=0;
			cpi->max_target=ARCMSR_MAX_TARGETID;        /* 0-16 */
			cpi->max_lun=ARCMSR_MAX_TARGETLUN;	    /* 0-7 */
			cpi->initiator_id=ARCMSR_SCSI_INITIATOR_ID; /* 255 */
			cpi->bus_id=cam_sim_bus(psim);
			strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
			strncpy(cpi->hba_vid, "ARCMSR", HBA_IDLEN);
			strncpy(cpi->dev_name, cam_sim_name(psim), DEV_IDLEN);
			cpi->unit_number=cam_sim_unit(psim);
			cpi->transport = XPORT_SPI;
			cpi->transport_version = 2;
			cpi->protocol = PROTO_SCSI;
			cpi->protocol_version = SCSI_REV_2;
			cpi->ccb_h.status |= CAM_REQ_CMP;
			xpt_done(pccb);
			break;
		}
	case XPT_ABORT: {
			union ccb *pabort_ccb;

			pabort_ccb=pccb->cab.abort_ccb;
			switch (pabort_ccb->ccb_h.func_code) {
			case XPT_ACCEPT_TARGET_IO:
			case XPT_IMMED_NOTIFY:
			case XPT_CONT_TARGET_IO:
				if(arcmsr_seek_cmd2abort(pabort_ccb)==TRUE) {
					pabort_ccb->ccb_h.status |= CAM_REQ_ABORTED;
					xpt_done(pabort_ccb);
					pccb->ccb_h.status |= CAM_REQ_CMP;
				} else {
					xpt_print_path(pabort_ccb->ccb_h.path);
					printf("Not found\n");
					pccb->ccb_h.status |= CAM_PATH_INVALID;
				}
				break;
			case XPT_SCSI_IO:
				pccb->ccb_h.status |= CAM_UA_ABORT;
				break;
			default:
				pccb->ccb_h.status |= CAM_REQ_INVALID;
				break;
			}
			xpt_done(pccb);
			break;
		}
	case XPT_RESET_BUS:
	case XPT_RESET_DEV: {
			u_int32_t     i;

			arcmsr_bus_reset(acb);
			for (i=0; i < 500; i++) {
				DELAY(1000);	
			}
			pccb->ccb_h.status |= CAM_REQ_CMP;
			xpt_done(pccb);
			break;
		}
	case XPT_TERM_IO: {
			pccb->ccb_h.status |= CAM_REQ_INVALID;
			xpt_done(pccb);
			break;
		}
	case XPT_GET_TRAN_SETTINGS: {
			struct ccb_trans_settings *cts;
			struct ccb_trans_settings_scsi *scsi;
			struct ccb_trans_settings_spi *spi;

			if(pccb->ccb_h.target_id == 16) {
				pccb->ccb_h.status |= CAM_FUNC_NOTAVAIL;
				xpt_done(pccb);
				break;
			}

			cts= &pccb->cts;
			scsi = &cts->proto_specific.scsi;
			spi = &cts->xport_specific.spi;

			cts->protocol = PROTO_SCSI;
			cts->protocol_version = SCSI_REV_2;
			cts->transport = XPORT_SPI;
			cts->transport_version = 2;
			spi->flags = CTS_SPI_FLAGS_DISC_ENB;
			spi->sync_period=3;
			spi->sync_offset=32;
			spi->bus_width=MSG_EXT_WDTR_BUS_16_BIT;
			scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
			spi->valid = CTS_SPI_VALID_SYNC_RATE
				| CTS_SPI_VALID_SYNC_OFFSET
				| CTS_SPI_VALID_BUS_WIDTH;
			scsi->valid = CTS_SCSI_VALID_TQ;

			pccb->ccb_h.status |= CAM_REQ_CMP;
			xpt_done(pccb);
			break;
		}
	case XPT_SET_TRAN_SETTINGS: {
			pccb->ccb_h.status |= CAM_FUNC_NOTAVAIL;
			xpt_done(pccb);
			break;
		}
	case XPT_CALC_GEOMETRY: {
			struct ccb_calc_geometry *ccg;
			u_int32_t size_mb;
			u_int32_t secs_per_cylinder;

			if(pccb->ccb_h.target_id == 16) {
				pccb->ccb_h.status |= CAM_FUNC_NOTAVAIL;
				xpt_done(pccb);
				break;
			}
 			ccg= &pccb->ccg;
			if (ccg->block_size == 0) {
				pccb->ccb_h.status = CAM_REQ_INVALID;
				xpt_done(pccb);
				break;
			}
			if(((1024L * 1024L)/ccg->block_size) < 0) {
				pccb->ccb_h.status = CAM_REQ_INVALID;
				xpt_done(pccb);
				break;
			}
			size_mb=ccg->volume_size/((1024L * 1024L)/ccg->block_size);
			if(size_mb > 1024 ) {
				ccg->heads=255;
				ccg->secs_per_track=63;
			} else {
				ccg->heads=64;
				ccg->secs_per_track=32;
			}
			secs_per_cylinder=ccg->heads * ccg->secs_per_track;
			ccg->cylinders=ccg->volume_size / secs_per_cylinder;
			pccb->ccb_h.status |= CAM_REQ_CMP;
			xpt_done(pccb);
			break;
		}
	default:
		pccb->ccb_h.status |= CAM_REQ_INVALID;
		xpt_done(pccb);
		break;
	}
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb)
{
	acb->acb_flags |= ACB_F_MSG_START_BGRB;
	CHIP_REG_WRITE32(inbound_msgaddr0, ARCMSR_INBOUND_MESG0_START_BGRB);
	if(arcmsr_wait_msgint_ready(acb)) {
		printf("arcmsr%d: wait 'start adapter background rebulid' timeout \n", acb->pci_unit);
	}
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_polling_srbdone(struct AdapterControlBlock *acb, struct CommandControlBlock *poll_srb)
{
	struct CommandControlBlock *srb;
	uint32_t flag_srb, outbound_intstatus, poll_srb_done=0, poll_count=0;
	int id, lun;

polling_srb_retry:
	poll_count++;
	outbound_intstatus=CHIP_REG_READ32(outbound_intstatus) & acb->outbound_int_enable;
	CHIP_REG_WRITE32(outbound_intstatus, outbound_intstatus);/*clear interrupt*/
	while(1) {
		if((flag_srb=CHIP_REG_READ32(outbound_queueport))==0xFFFFFFFF) {
			if(poll_srb_done) {
				break;/*chip FIFO no ccb for completion already*/
			} else {
				UDELAY(25000);
				if(poll_count > 100) {
					break;
				}
				goto polling_srb_retry;
			}
		}
		/* check ifcommand done with no error*/
		srb=(struct CommandControlBlock *)(acb->vir2phy_offset+(flag_srb << 5));
		/*frame must be 32 bytes aligned*/
		if((srb->acb!=acb) || (srb->startdone!=ARCMSR_SRB_START)) {
			if((srb->startdone==ARCMSR_SRB_ABORTED) && (srb==poll_srb)) {
				printf("arcmsr%d: scsi id=%d lun=%d srb='%p'"
					"poll command abort successfully \n"
					, acb->pci_unit
					, srb->pccb->ccb_h.target_id
					, srb->pccb->ccb_h.target_lun, srb);
				srb->pccb->ccb_h.status |= CAM_REQ_ABORTED;
				arcmsr_srb_complete(srb, 1);
				poll_srb_done=1;
				continue;
			}
			printf("arcmsr%d: polling get an illegal srb command done srb='%p'"
				"srboutstandingcount=%d \n"
				, acb->pci_unit
				, srb, acb->srboutstandingcount);
			continue;
		}
		id=srb->pccb->ccb_h.target_id;
		lun=srb->pccb->ccb_h.target_lun;
		if((flag_srb & ARCMSR_SRBREPLY_FLAG_ERROR)==0) {
			if(acb->devstate[id][lun]==ARECA_RAID_GONE) {
                acb->devstate[id][lun]=ARECA_RAID_GOOD;
			}
 			srb->pccb->ccb_h.status |= CAM_REQ_CMP;
			arcmsr_srb_complete(srb, 1);
		} else {
			switch(srb->arcmsr_cdb.DeviceStatus) {
			case ARCMSR_DEV_SELECT_TIMEOUT: {
					acb->devstate[id][lun]=ARECA_RAID_GONE;
					srb->pccb->ccb_h.status |= CAM_SEL_TIMEOUT;
					arcmsr_srb_complete(srb, 1);
				}
				break;
			case ARCMSR_DEV_ABORTED:
			case ARCMSR_DEV_INIT_FAIL: {
					acb->devstate[id][lun]=ARECA_RAID_GONE;
					srb->pccb->ccb_h.status |= CAM_DEV_NOT_THERE;
					arcmsr_srb_complete(srb, 1);
				}
				break;
			case SCSISTAT_CHECK_CONDITION: {
					acb->devstate[id][lun]=ARECA_RAID_GOOD;
					arcmsr_report_sense_info(srb);
					arcmsr_srb_complete(srb, 1);
				}
				break;
			default:
				printf("arcmsr%d: scsi id=%d lun=%d"
					"polling and getting command error done"
					", but got unknow DeviceStatus=0x%x \n"
					, acb->pci_unit, id, lun, srb->arcmsr_cdb.DeviceStatus);
				acb->devstate[id][lun]=ARECA_RAID_GONE;
				srb->pccb->ccb_h.status |= CAM_UNCOR_PARITY;
				/*unknow error or crc error just for retry*/
				arcmsr_srb_complete(srb, 1);
				break;
			}
		}
	}	/*drain reply FIFO*/
	return;
}
/*
**********************************************************************
**  get firmware miscellaneous data
**********************************************************************
*/
static void arcmsr_get_firmware_spec(struct AdapterControlBlock *acb)
{
	char *acb_firm_model=acb->firm_model;
	char *acb_firm_version=acb->firm_version;
	size_t iop_firm_model=offsetof(struct MessageUnit,message_rwbuffer[15]);   /*firm_model,15,60-67*/
	size_t iop_firm_version=offsetof(struct MessageUnit,message_rwbuffer[17]); /*firm_version,17,68-83*/
	int i;

	CHIP_REG_WRITE32(inbound_msgaddr0, ARCMSR_INBOUND_MESG0_GET_CONFIG);
	if(arcmsr_wait_msgint_ready(acb)) {
		printf("arcmsr%d: wait 'get adapter firmware miscellaneous data' timeout \n"
			, acb->pci_unit);
	}
	i=0;
	while(i<8) {
		*acb_firm_model=bus_space_read_1(acb->btag, acb->bhandle, iop_firm_model+i); 
		/* 8 bytes firm_model, 15, 60-67*/
		acb_firm_model++;
		i++;
	}
	i=0;
	while(i<16) {
		*acb_firm_version=bus_space_read_1(acb->btag, acb->bhandle, iop_firm_version+i); 
		/* 16 bytes firm_version, 17, 68-83*/
		acb_firm_version++;
		i++;
	}
	printf("ARECA RAID ADAPTER%d: %s \n", acb->pci_unit, ARCMSR_DRIVER_VERSION);
	printf("ARECA RAID ADAPTER%d: FIRMWARE VERSION %s \n", acb->pci_unit, acb->firm_version);
	acb->firm_request_len=CHIP_REG_READ32(message_rwbuffer[1]);   /*firm_request_len, 1, 04-07*/
	acb->firm_numbers_queue=CHIP_REG_READ32(message_rwbuffer[2]); /*firm_numbers_queue, 2, 08-11*/
	acb->firm_sdram_size=CHIP_REG_READ32(message_rwbuffer[3]);    /*firm_sdram_size, 3, 12-15*/
	acb->firm_ide_channels=CHIP_REG_READ32(message_rwbuffer[4]);  /*firm_ide_channels, 4, 16-19*/
	return;
}
/*
**********************************************************************
**  start background rebulid
**********************************************************************
*/
static void arcmsr_iop_init(struct AdapterControlBlock *acb)
{
	u_int32_t intmask_org, mask, outbound_doorbell, firmware_state=0;

	do {
        	firmware_state=CHIP_REG_READ32(outbound_msgaddr1);
	} while((firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK)==0);
	intmask_org=CHIP_REG_READ32(outbound_intmask)|ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE;
	CHIP_REG_WRITE32(outbound_intmask, intmask_org);
	intmask_org=CHIP_REG_READ32(outbound_intmask)|ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE;
	arcmsr_get_firmware_spec(acb);
	arcmsr_start_adapter_bgrb(acb);
	/* clear Qbuffer if door bell ringed */
	outbound_doorbell=CHIP_REG_READ32(outbound_doorbell);
	CHIP_REG_WRITE32(outbound_doorbell, outbound_doorbell);/*clear interrupt */
	CHIP_REG_WRITE32(inbound_doorbell, ARCMSR_INBOUND_DRIVER_DATA_READ_OK);
	/* enable outbound Post Queue, outbound message0, outbell doorbell Interrupt */
	mask=~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE|ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
	CHIP_REG_WRITE32(outbound_intmask, intmask_org & mask);
	acb->outbound_int_enable = ~(intmask_org & mask) & 0x000000ff;
	acb->acb_flags |=ACB_F_IOP_INITED;
	return;
}
/*
**********************************************************************
**********************************************************************
*/
static void arcmsr_map_freesrb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
	struct AdapterControlBlock *acb=arg;
	struct CommandControlBlock *srb_tmp;
	u_int8_t * dma_memptr;
	u_int32_t i, srb_phyaddr_hi32;
	unsigned long srb_phyaddr=(unsigned long)segs->ds_addr;

	dma_memptr=acb->uncacheptr;
	srb_phyaddr=segs->ds_addr; /* We suppose bus_addr_t high part always 0 here*/
	if(((unsigned long)dma_memptr & 0x1F)!=0) {
		dma_memptr=dma_memptr+(0x20-((unsigned long)dma_memptr & 0x1F));
		srb_phyaddr=srb_phyaddr+(0x20-((unsigned long)srb_phyaddr & 0x1F));
	}
	srb_tmp=(struct CommandControlBlock *)dma_memptr;
	for(i=0;i<ARCMSR_MAX_FREESRB_NUM;i++) {
		/*srb address must 32 (0x20) boundary*/
		if(((unsigned long)srb_tmp & 0x1F)==0) {
			if(bus_dmamap_create(acb->dm_segs_dmat, /*flags*/0, &srb_tmp->dm_segs_dmamap)!=0) {
				acb->acb_flags |= ACB_F_MAPFREESRB_FAILD;
				printf("arcmsr%d: srb dmamap bus_dmamap_create error\n", acb->pci_unit);
				return;
			}
			srb_tmp->cdb_shifted_phyaddr=srb_phyaddr >> 5;
			srb_tmp->acb=acb;
			acb->srbworkingQ[i]=acb->psrb_pool[i]=srb_tmp;
			srb_phyaddr=srb_phyaddr+sizeof(struct CommandControlBlock);
		} else {
			acb->acb_flags |= ACB_F_MAPFREESRB_FAILD;
			printf("arcmsr%d: dma_memptr=%p i=%d"
				"this srb cross 32 bytes boundary ignored srb_tmp=%p \n"
				, acb->pci_unit, dma_memptr, i, srb_tmp);
			return;
		}
		srb_tmp++;
	}
	acb->vir2phy_offset=(unsigned long)srb_tmp-(unsigned long)srb_phyaddr;
	/*
	********************************************************************
	** here we need to tell iop 331 our freesrb.HighPart 
	** if freesrb.HighPart is not zero
	********************************************************************
	*/
	srb_phyaddr_hi32=(uint32_t) ((srb_phyaddr>>16)>>16);
	if(srb_phyaddr_hi32!=0) {
		CHIP_REG_WRITE32(message_rwbuffer[0], ARCMSR_SIGNATURE_SET_CONFIG);
		CHIP_REG_WRITE32(message_rwbuffer[1], srb_phyaddr_hi32);
		CHIP_REG_WRITE32(inbound_msgaddr0, ARCMSR_INBOUND_MESG0_SET_CONFIG);
		if(arcmsr_wait_msgint_ready(acb)) {
			printf("arcmsr%d: 'set srb high part physical address' timeout \n", acb->pci_unit);
		}
	}
	return;
}
/*
************************************************************************
**
**
************************************************************************
*/
static void arcmsr_free_resource(struct AdapterControlBlock *acb)
{
	/* remove the control device */
	if(acb->ioctl_dev != NULL) {
		destroy_dev(acb->ioctl_dev);
	}
	bus_dmamap_unload(acb->srb_dmat, acb->srb_dmamap);
	bus_dmamap_destroy(acb->srb_dmat, acb->srb_dmamap);
	bus_dma_tag_destroy(acb->srb_dmat);
	bus_dma_tag_destroy(acb->dm_segs_dmat);
	bus_dma_tag_destroy(acb->parent_dmat);
	return;
}
/*
************************************************************************
************************************************************************
*/
static u_int32_t arcmsr_initialize(device_t dev)
{
	struct AdapterControlBlock *acb=device_get_softc(dev);
	u_int32_t intmask_org, rid=PCIR_BAR(0);
	vm_offset_t	mem_base;
	u_int16_t pci_command;
	int i, j;

#if __FreeBSD_version >= 502010
	if(bus_dma_tag_create(  /*parent*/	NULL,
				/*alignemnt*/	1,
				/*boundary*/	0,
				/*lowaddr*/	BUS_SPACE_MAXADDR,
				/*highaddr*/	BUS_SPACE_MAXADDR,
				/*filter*/	NULL,
				/*filterarg*/	NULL,
				/*maxsize*/	BUS_SPACE_MAXSIZE_32BIT,
				/*nsegments*/	BUS_SPACE_UNRESTRICTED,
				/*maxsegsz*/	BUS_SPACE_MAXSIZE_32BIT,
				/*flags*/	0,
				/*lockfunc*/	NULL,
				/*lockarg*/	NULL,
						&acb->parent_dmat) != 0)
#else
	if(bus_dma_tag_create(  /*parent*/	NULL,
				/*alignemnt*/	1,
				/*boundary*/	0,
				/*lowaddr*/	BUS_SPACE_MAXADDR,
				/*highaddr*/	BUS_SPACE_MAXADDR,
				/*filter*/	NULL,
				/*filterarg*/	NULL,
				/*maxsize*/	BUS_SPACE_MAXSIZE_32BIT,
				/*nsegments*/	BUS_SPACE_UNRESTRICTED,
				/*maxsegsz*/	BUS_SPACE_MAXSIZE_32BIT,
				/*flags*/	0,
						&acb->parent_dmat) != 0)
#endif
	{
		printf("arcmsr%d: parent_dmat bus_dma_tag_create failure!\n", acb->pci_unit);
		return ENOMEM;
	}
	/* Create a single tag describing a region large enough to hold all of the s/g lists we will need. */
#if __FreeBSD_version >= 502010
	if(bus_dma_tag_create(  /*parent_dmat*/	acb->parent_dmat,
				/*alignment*/	1,
				/*boundary*/	0,
				/*lowaddr*/	BUS_SPACE_MAXADDR,
				/*highaddr*/	BUS_SPACE_MAXADDR,
				/*filter*/	NULL,
				/*filterarg*/	NULL,
				/*maxsize*/	MAXBSIZE,
				/*nsegments*/	ARCMSR_MAX_SG_ENTRIES,
				/*maxsegsz*/	BUS_SPACE_MAXSIZE_32BIT,
				/*flags*/	0,
				/*lockfunc*/	busdma_lock_mutex,
				/*lockarg*/	&Giant,
						&acb->dm_segs_dmat) != 0)
#else
	if(bus_dma_tag_create(  /*parent_dmat*/	acb->parent_dmat,
				/*alignment*/	1,
				/*boundary*/	0,
				/*lowaddr*/	BUS_SPACE_MAXADDR,
				/*highaddr*/	BUS_SPACE_MAXADDR,
				/*filter*/	NULL,
				/*filterarg*/	NULL,
				/*maxsize*/	MAXBSIZE,
				/*nsegments*/	ARCMSR_MAX_SG_ENTRIES,
				/*maxsegsz*/	BUS_SPACE_MAXSIZE_32BIT,
				/*flags*/	0,
						&acb->dm_segs_dmat) != 0)
#endif
	{
		bus_dma_tag_destroy(acb->parent_dmat);
		printf("arcmsr%d: dm_segs_dmat bus_dma_tag_create failure!\n", acb->pci_unit);
		return ENOMEM;
	}
	/* DMA tag for our srb structures.... Allocate the freesrb memory */
#if __FreeBSD_version >= 502010
	if(bus_dma_tag_create(  /*parent_dmat*/	acb->parent_dmat,
				/*alignment*/	1,
				/*boundary*/	0,
				/*lowaddr*/	BUS_SPACE_MAXADDR_32BIT,
				/*highaddr*/	BUS_SPACE_MAXADDR,
				/*filter*/	NULL,
				/*filterarg*/	NULL,
				/*maxsize*/	ARCMSR_SRBS_POOL_SIZE,
				/*nsegments*/	1,
				/*maxsegsz*/	BUS_SPACE_MAXSIZE_32BIT,
				/*flags*/	0,
				/*lockfunc*/	NULL,
				/*lockarg*/	NULL,
						&acb->srb_dmat) != 0)
#else
	if(bus_dma_tag_create(  /*parent_dmat*/	acb->parent_dmat,
				/*alignment*/	1,
				/*boundary*/	0,
				/*lowaddr*/	BUS_SPACE_MAXADDR_32BIT,
				/*highaddr*/	BUS_SPACE_MAXADDR,
				/*filter*/	NULL,
				/*filterarg*/	NULL,
				/*maxsize*/	ARCMSR_SRBS_POOL_SIZE,
				/*nsegments*/	1,
				/*maxsegsz*/	BUS_SPACE_MAXSIZE_32BIT,
				/*flags*/	0,
						&acb->srb_dmat) != 0)
#endif
	{
		bus_dma_tag_destroy(acb->dm_segs_dmat);
		bus_dma_tag_destroy(acb->parent_dmat);
		printf("arcmsr%d: srb_dmat bus_dma_tag_create failure!\n", acb->pci_unit);
		return ENXIO;
	}
	/* Allocation for our srbs */
	if(bus_dmamem_alloc(acb->srb_dmat, (void **)&acb->uncacheptr
		, BUS_DMA_WAITOK | BUS_DMA_COHERENT, &acb->srb_dmamap) != 0) {
		bus_dma_tag_destroy(acb->srb_dmat);
		bus_dma_tag_destroy(acb->dm_segs_dmat);
		bus_dma_tag_destroy(acb->parent_dmat);
		printf("arcmsr%d: srb_dmat bus_dmamem_alloc failure!\n", acb->pci_unit);
		return ENXIO;
	}
	/* And permanently map them */
	if(bus_dmamap_load(acb->srb_dmat, acb->srb_dmamap, acb->uncacheptr
		, ARCMSR_SRBS_POOL_SIZE, arcmsr_map_freesrb, acb, /*flags*/0)) {
		bus_dma_tag_destroy(acb->srb_dmat);
		bus_dma_tag_destroy(acb->dm_segs_dmat);
		bus_dma_tag_destroy(acb->parent_dmat);
		printf("arcmsr%d: srb_dmat bus_dmamap_load failure!\n", acb->pci_unit);
		return ENXIO;
	}
	pci_command=pci_read_config(dev, PCIR_COMMAND, 2);
	pci_command |= PCIM_CMD_BUSMASTEREN;
	pci_command |= PCIM_CMD_PERRESPEN;
	pci_command |= PCIM_CMD_MWRICEN;
	/* Enable Busmaster/Mem */
	pci_command |= PCIM_CMD_MEMEN;
	pci_write_config(dev, PCIR_COMMAND, pci_command, 2);
	acb->sys_res_arcmsr=bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0ul, ~0ul, 0x1000, RF_ACTIVE);
	if(acb->sys_res_arcmsr == NULL) {
		arcmsr_free_resource(acb);
		printf("arcmsr%d: bus_alloc_resource failure!\n", acb->pci_unit);
		return ENOMEM;
	}
	if(rman_get_start(acb->sys_res_arcmsr) <= 0) {
		arcmsr_free_resource(acb);
		printf("arcmsr%d: rman_get_start failure!\n", acb->pci_unit);
		return ENXIO;
	}
	mem_base=(vm_offset_t) rman_get_virtual(acb->sys_res_arcmsr);
	if(mem_base==0) {
		arcmsr_free_resource(acb);
		printf("arcmsr%d: rman_get_virtual failure!\n", acb->pci_unit);
		return ENXIO;
	}
	if(acb->acb_flags & ACB_F_MAPFREESRB_FAILD) {
		arcmsr_free_resource(acb);
		printf("arcmsr%d: map free srb failure!\n", acb->pci_unit);
		return ENXIO;
	}
	acb->btag=rman_get_bustag(acb->sys_res_arcmsr);
	acb->bhandle=rman_get_bushandle(acb->sys_res_arcmsr);
	acb->pmu=(struct MessageUnit *)mem_base;
	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 raid volume state
	********************************************************************
	*/
	for(i=0;i<ARCMSR_MAX_TARGETID;i++) {
		for(j=0;j<ARCMSR_MAX_TARGETLUN;j++) {
			acb->devstate[i][j]=ARECA_RAID_GOOD;
		}
	}
	/* disable iop all outbound interrupt */
	intmask_org=CHIP_REG_READ32(outbound_intmask);
	CHIP_REG_WRITE32(outbound_intmask, intmask_org|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE);
	arcmsr_iop_init(acb);
	return(0);
}
/*
************************************************************************
************************************************************************
*/
static u_int32_t arcmsr_attach(device_t dev)
{
	struct AdapterControlBlock *acb=(struct AdapterControlBlock *)device_get_softc(dev);
	u_int32_t unit=device_get_unit(dev);
	struct ccb_setasync csa;
	struct cam_devq	*devq;	/* Device Queue to use for this SIM */
	struct resource	*irqres;
	int	rid;

	if(acb == NULL) {
		printf("arcmsr%d: cannot allocate softc\n", unit);
		return (ENOMEM);
	}
	bzero(acb, sizeof(struct AdapterControlBlock));
	if(arcmsr_initialize(dev)) {
		printf("arcmsr%d: initialize failure!\n", unit);
		return ENXIO;
	}
	/* After setting up the adapter, map our interrupt */
	rid=0;
	irqres=bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, RF_SHAREABLE | RF_ACTIVE);
	if(irqres == NULL || 
	bus_setup_intr(dev, irqres, INTR_TYPE_CAM|INTR_ENTROPY|INTR_MPSAFE
  		, NULL, arcmsr_interrupt, acb, &acb->ih))  {
		arcmsr_free_resource(acb);
		printf("arcmsr%d: unable to register interrupt handler!\n", unit);
		return ENXIO;
	}
	acb->irqres=irqres;
	acb->pci_dev=dev;
	acb->pci_unit=unit;
	/*
	 * Now let the CAM generic SCSI layer find the SCSI devices on
	 * the bus *  start queue to reset to the idle loop. *
	 * Create device queue of SIM(s) *  (MAX_START_JOB - 1) :
	 * max_sim_transactions
	*/
	devq=cam_simq_alloc(ARCMSR_MAX_START_JOB);
	if(devq == NULL) {
	    arcmsr_free_resource(acb);
		bus_release_resource(dev, SYS_RES_IRQ, 0, acb->irqres);
		printf("arcmsr%d: cam_simq_alloc failure!\n", unit);
		return ENXIO;
	}
	acb->psim=cam_sim_alloc(arcmsr_action, arcmsr_poll,
		"arcmsr", acb, unit, &Giant, 1,
		ARCMSR_MAX_OUTSTANDING_CMD, devq);
	if(acb->psim == NULL) {
		arcmsr_free_resource(acb);
		bus_release_resource(dev, SYS_RES_IRQ, 0, acb->irqres);
		cam_simq_free(devq);
		printf("arcmsr%d: cam_sim_alloc failure!\n", unit);
		return ENXIO;
	}
	if(xpt_bus_register(acb->psim, 0) != CAM_SUCCESS) {
		arcmsr_free_resource(acb);
		bus_release_resource(dev, SYS_RES_IRQ, 0, acb->irqres);
		cam_sim_free(acb->psim, /*free_devq*/TRUE);
		printf("arcmsr%d: xpt_bus_register failure!\n", unit);
		return ENXIO;
	}
 	if(xpt_create_path(&acb->ppath, /* periph */ NULL
		, cam_sim_path(acb->psim)
		, CAM_TARGET_WILDCARD
		, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
		arcmsr_free_resource(acb);
		bus_release_resource(dev, SYS_RES_IRQ, 0, acb->irqres);
		xpt_bus_deregister(cam_sim_path(acb->psim));
		cam_sim_free(acb->psim, /* free_simq */ TRUE);
		printf("arcmsr%d: xpt_create_path failure!\n", unit);
		return ENXIO;
	}
	ARCMSR_LOCK_INIT(&acb->workingQ_done_lock, "arcmsr done working Q lock");
	ARCMSR_LOCK_INIT(&acb->workingQ_start_lock, "arcmsr start working Q lock");
	ARCMSR_LOCK_INIT(&acb->qbuffer_lock, "arcmsr Q buffer lock");
	/*
	****************************************************
	*/
	xpt_setup_ccb(&csa.ccb_h, acb->ppath, /*priority*/5);
	csa.ccb_h.func_code=XPT_SASYNC_CB;
	csa.event_enable=AC_FOUND_DEVICE|AC_LOST_DEVICE;
	csa.callback=arcmsr_async;
	csa.callback_arg=acb->psim;
	xpt_action((union ccb *)&csa);
	/* Create the control device.  */
	acb->ioctl_dev=make_dev(&arcmsr_cdevsw
		, unit
		, UID_ROOT
		, GID_WHEEL /* GID_OPERATOR */
		, S_IRUSR | S_IWUSR
		, "arcmsr%d", unit);
#if __FreeBSD_version < 503000
	acb->ioctl_dev->si_drv1=acb;
#endif
#if __FreeBSD_version > 500005
	(void)make_dev_alias(acb->ioctl_dev, "arc%d", unit);
#endif
	return 0;
}
/*
************************************************************************
************************************************************************
*/
static u_int32_t arcmsr_probe(device_t dev)
{
	u_int32_t id;
	static char buf[256];
	char *type;
	int raid6 = 1;

	if (pci_get_vendor(dev) != PCI_VENDOR_ID_ARECA) {
		return (ENXIO);
	}
	switch(id=pci_get_devid(dev)) {
	case PCIDevVenIDARC1110:
	case PCIDevVenIDARC1210:
		raid6 = 0;
		/*FALLTHRU*/
	case PCIDevVenIDARC1120:
	case PCIDevVenIDARC1130:
	case PCIDevVenIDARC1160:
	case PCIDevVenIDARC1170:
	case PCIDevVenIDARC1220:
	case PCIDevVenIDARC1230:
	case PCIDevVenIDARC1260:
	case PCIDevVenIDARC1270:
	case PCIDevVenIDARC1280:
		type = "SATA";
		break;
	case PCIDevVenIDARC1380:
	case PCIDevVenIDARC1381:
	case PCIDevVenIDARC1680:
	case PCIDevVenIDARC1681:
		type = "SAS";
		break;
	default:
		type = "X-TYPE";
		break;
	}
	sprintf(buf, "Areca %s Host Adapter RAID Controller %s\n", type, raid6 ? "(RAID6 capable)" : "");
	device_set_desc_copy(dev, buf);
	return 0;
}
/*
************************************************************************
************************************************************************
*/
static void arcmsr_shutdown(device_t dev)
{
	u_int32_t  i, poll_count=0;
	u_int32_t intmask_org;
	struct CommandControlBlock *srb;
	struct AdapterControlBlock *acb=(struct AdapterControlBlock *)device_get_softc(dev);

	/* stop adapter background rebuild */
	arcmsr_stop_adapter_bgrb(acb);
	arcmsr_flush_adapter_cache(acb);
	/* disable all outbound interrupt */
	intmask_org=CHIP_REG_READ32(outbound_intmask);
	CHIP_REG_WRITE32(outbound_intmask, (intmask_org|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE));
	/* abort all outstanding command */
	acb->acb_flags |= ACB_F_SCSISTOPADAPTER;
	acb->acb_flags &= ~ACB_F_IOP_INITED;
	if(acb->srboutstandingcount!=0) {
		while((acb->srboutstandingcount!=0) && (poll_count < 256)) {
			arcmsr_interrupt((void *)acb);
			UDELAY(25000);
			poll_count++;
		}
		if(acb->srboutstandingcount!=0) {
			arcmsr_abort_allcmd(acb);
			/*clear all outbound posted Q*/
			for(i=0;i<ARCMSR_MAX_OUTSTANDING_CMD;i++) {
				CHIP_REG_READ32(outbound_queueport);
			}
			for(i=0;i<ARCMSR_MAX_FREESRB_NUM;i++) {
				srb=acb->psrb_pool[i];
				if(srb->startdone==ARCMSR_SRB_START) {
					srb->startdone=ARCMSR_SRB_ABORTED;
					srb->pccb->ccb_h.status |= CAM_REQ_ABORTED;
					arcmsr_srb_complete(srb, 1);
				}
			}
		}
	}
	atomic_set_int(&acb->srboutstandingcount, 0);
	acb->workingsrb_doneindex=0;
	acb->workingsrb_startindex=0;
	return;
}
/*
************************************************************************
************************************************************************
*/
static u_int32_t arcmsr_detach(device_t dev)
{
	struct AdapterControlBlock *acb=(struct AdapterControlBlock *)device_get_softc(dev);

	arcmsr_shutdown(dev);
	arcmsr_free_resource(acb);
	bus_release_resource(dev, SYS_RES_MEMORY, PCIR_BAR(0), acb->sys_res_arcmsr);
	bus_teardown_intr(dev, acb->irqres, acb->ih);
	bus_release_resource(dev, SYS_RES_IRQ, 0, acb->irqres);
	xpt_async(AC_LOST_DEVICE, acb->ppath, NULL);
	xpt_free_path(acb->ppath);
	xpt_bus_deregister(cam_sim_path(acb->psim));
	cam_sim_free(acb->psim, TRUE);
	return (0);
}