Attachment 295784 Details for Bug 428801 – arcmsr_hba.c

[patch] arcmsr_hba.c

arcmsr_hba.c (text/plain), 47.93 KB, created by Tomas Henzl on 2008-02-25 11:06:59 UTC

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Creator: Tomas Henzl

Created: 2008-02-25 11:06:59 UTC

Size: 47.93 KB

patch

obsolete

>/*
>*******************************************************************************
>**        O.S   : Linux
>**   FILE NAME  : arcmsr_hba.c
>**        BY    : Erich Chen
>**   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: erich@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.
>******************************************************************************
>******************************************************************************
>** History
>**
>**   REV#         DATE             NAME         DESCRIPTION
>** 1.00.00.00    3/31/2004       Erich Chen     First release
>** 1.10.00.04    7/28/2004       Erich Chen     modify for ioctl
>** 1.10.00.06    8/28/2004       Erich Chen     modify for 2.6.x
>** 1.10.00.08    9/28/2004       Erich Chen     modify for x86_64
>** 1.10.00.10   10/10/2004       Erich Chen     bug fix for SMP & ioctl
>** 1.20.00.00   11/29/2004       Erich Chen     bug fix with arcmsr_bus_reset when PHY error
>** 1.20.00.02   12/09/2004       Erich Chen     bug fix with over 2T bytes RAID Volume
>** 1.20.00.04    1/09/2005       Erich Chen     fits for Debian linux kernel version 2.2.xx
>** 1.20.00.05    2/20/2005       Erich Chen     cleanly as look like a Linux driver at 2.6.x
>**                                              thanks for peoples kindness comment
>**						Kornel Wieliczek
>**						Christoph Hellwig
>**						Adrian Bunk
>**						Andrew Morton
>**						Christoph Hellwig
>**						James Bottomley
>**						Arjan van de Ven
>** 1.20.00.06    3/12/2005       Erich Chen     fix with arcmsr_pci_unmap_dma "unsigned long" cast,
>**						modify PCCB POOL allocated by "dma_alloc_coherent"
>**						(Kornel Wieliczek's comment)
>** 1.20.00.07    3/23/2005       Erich Chen     bug fix with arcmsr_scsi_host_template_init
>**						occur segmentation fault,
>**						if RAID adapter does not on PCI slot
>**						and modprobe/rmmod this driver twice.
>**						bug fix enormous stack usage (Adrian Bunk's comment)
>** 1.20.00.08    6/23/2005       Erich Chen     bug fix with abort command,
>**						in case of heavy loading when sata cable
>**						working on low quality connection
>** 1.20.00.09    9/12/2005       Erich Chen     bug fix with abort command handling, firmware version check
>**						and firmware update notify for hardware bug fix
>** 1.20.00.10    9/23/2005       Erich Chen     enhance sysfs function for change driver's max tag Q number.
>**						add DMA_64BIT_MASK for backward compatible with all 2.6.x
>**						add some useful message for abort command
>**						add ioctl code 'ARCMSR_IOCTL_FLUSH_ADAPTER_CACHE'
>**						customer can send this command for sync raid volume data
>** 1.20.00.11    9/29/2005       Erich Chen     by comment of Arjan van de Ven fix incorrect msleep redefine
>**						cast off sizeof(dma_addr_t) condition for 64bit pci_set_dma_mask
>** 1.20.00.12    9/30/2005       Erich Chen     bug fix with 64bit platform's ccbs using if over 4G system memory
>**						change 64bit pci_set_consistent_dma_mask into 32bit
>**						increcct adapter count if adapter initialize fail.
>**						miss edit at arcmsr_build_ccb....
>**						psge += sizeof(struct _SG64ENTRY *) =>
>**						psge += sizeof(struct _SG64ENTRY)
>**						64 bits sg entry would be incorrectly calculated
>**						thanks Kornel Wieliczek give me kindly notify
>**						and detail description
>** 1.20.00.13   11/15/2005       Erich Chen     scheduling pending ccb with FIFO
>**						change the architecture of arcmsr command queue list
>**						for linux standard list
>**						enable usage of pci message signal interrupt
>**						follow Randy.Danlup kindness suggestion cleanup this code
>*******************************************************************************
>*/
>#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/pci.h>
>#include <asm/dma.h>
>#include <asm/io.h>
>#include <asm/system.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("Erich Chen <erich@areca.com.tw>");
>MODULE_DESCRIPTION("ARECA (ARC11xx/12xx) SATA RAID HOST Adapter");
>MODULE_LICENSE("Dual BSD/GPL");
>MODULE_VERSION(ARCMSR_DRIVER_VERSION);
>
>static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, struct scsi_cmnd *cmd);
>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_cmnd * cmd,
>				void (*done) (struct scsi_cmnd *));
>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_iop_init(struct AdapterControlBlock *acb);
>static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb);
>static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
>static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb);
>static uint8_t arcmsr_wait_msgint_ready(struct AdapterControlBlock *acb);
>static const char *arcmsr_info(struct Scsi_Host *);
>static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
>
>static struct scsi_host_template arcmsr_scsi_host_template = {
>	.module			= THIS_MODULE,
>	.name			= "ARCMSR ARECA SATA RAID HOST Adapter" 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,
>	.can_queue		= ARCMSR_MAX_OUTSTANDING_CMD,
>	.this_id		= ARCMSR_SCSI_INITIATOR_ID,
>	.sg_tablesize		= ARCMSR_MAX_SG_ENTRIES,
>	.max_sectors    	= ARCMSR_MAX_XFER_SECTORS,
>	.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_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)},
>	{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,
>};
>
>static irqreturn_t arcmsr_do_interrupt(int irq, void *dev_id, struct pt_regs *regs)
>{
>	irqreturn_t handle_state;
>	struct AdapterControlBlock *acb;
>	unsigned long flags;
>
>	acb = (struct AdapterControlBlock *)dev_id;
>
>	spin_lock_irqsave(acb->host->host_lock, flags);
>	handle_state = arcmsr_interrupt(acb);
>	spin_unlock_irqrestore(acb->host->host_lock, flags);
>	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 int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
>{
>	struct pci_dev *pdev = acb->pdev;
>	struct MessageUnit __iomem *reg = acb->pmu;
>	u32 ccb_phyaddr_hi32;
>	void *dma_coherent;
>	dma_addr_t dma_coherent_handle, dma_addr;
>	struct CommandControlBlock *ccb_tmp;
>	int i, j;
>
>	dma_coherent = dma_alloc_coherent(&pdev->dev,
>			ARCMSR_MAX_FREECCB_NUM *
>			sizeof (struct CommandControlBlock) + 0x20,
>			&dma_coherent_handle, GFP_KERNEL);
>	if (!dma_coherent)
>		return -ENOMEM;
>
>	acb->dma_coherent = dma_coherent;
>	acb->dma_coherent_handle = dma_coherent_handle;
>
>	if (((unsigned long)dma_coherent & 0x1F)) {
>		dma_coherent = dma_coherent +
>			(0x20 - ((unsigned long)dma_coherent & 0x1F));
>		dma_coherent_handle = dma_coherent_handle +
>			(0x20 - ((unsigned long)dma_coherent_handle & 0x1F));
>	}
>
>	dma_addr = dma_coherent_handle;
>	ccb_tmp = (struct CommandControlBlock *)dma_coherent;
>	for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
>		ccb_tmp->cdb_shifted_phyaddr = dma_addr >> 5;
>		ccb_tmp->acb = acb;
>		acb->pccb_pool[i] = ccb_tmp;
>		list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
>		dma_addr = dma_addr + sizeof (struct CommandControlBlock);
>		ccb_tmp++;
>	}
>
>	acb->vir2phy_offset = (unsigned long)ccb_tmp -
>			      (unsigned long)dma_addr;
>	for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
>		for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
>			acb->devstate[i][j] = ARECA_RAID_GOOD;
>
>	/*
>	** here we need to tell iop 331 our ccb_tmp.HighPart
>	** if ccb_tmp.HighPart is not zero
>	*/
>	ccb_phyaddr_hi32 = (uint32_t) ((dma_coherent_handle >> 16) >> 16);
>	if (ccb_phyaddr_hi32 != 0) {
>		writel(ARCMSR_SIGNATURE_SET_CONFIG, &reg->message_rwbuffer[0]);
>		writel(ccb_phyaddr_hi32, &reg->message_rwbuffer[1]);
>		writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, &reg->inbound_msgaddr0);
>		if (arcmsr_wait_msgint_ready(acb))
>			printk(KERN_NOTICE "arcmsr%d: "
>			       "'set ccb high part physical address' timeout\n",
>				acb->host->host_no);
>	}
>
>	writel(readl(&reg->outbound_intmask) |
>			ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE,
>	       &reg->outbound_intmask);
>	return 0;
>}
>
>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)
>		goto out;
>	pci_set_master(pdev);
>
>	host = scsi_host_alloc(&arcmsr_scsi_host_template,
>			sizeof(struct AdapterControlBlock));
>	if (!host) {
>		error = -ENOMEM;
>		goto out_disable_device;
>	}
>	acb = (struct AdapterControlBlock *)host->hostdata;
>	memset(acb, 0, sizeof (struct AdapterControlBlock));
>
>	error = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
>	if (error) {
>		error = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
>		if (error) {
>			printk(KERN_WARNING
>			       "scsi%d: No suitable DMA mask available\n",
>			       host->host_no);
>			goto out_host_put;
>		}
>	}
>	bus = pdev->bus->number;
>	dev_fun = pdev->devfn;
>	acb->host = host;
>	acb->pdev = pdev;
>	host->max_sectors = ARCMSR_MAX_XFER_SECTORS;
>	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->sg_tablesize = ARCMSR_MAX_SG_ENTRIES;
>	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;
>	host->irq = pdev->irq;
>	error = pci_request_regions(pdev, "arcmsr");
>	if (error)
>		goto out_host_put;
>
>	acb->pmu = ioremap(pci_resource_start(pdev, 0),
>			   pci_resource_len(pdev, 0));
>	if (!acb->pmu) {
>		printk(KERN_NOTICE "arcmsr%d: memory"
>			" mapping region fail \n", acb->host->host_no);
>		goto out_release_regions;
>	}
>	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);
>
>	error = arcmsr_alloc_ccb_pool(acb);
>	if (error)
>		goto out_iounmap;
>
>	error = request_irq(pdev->irq, arcmsr_do_interrupt,
>			SA_INTERRUPT | SA_SHIRQ, "arcmsr", acb);
>	if (error)
>		goto out_free_ccb_pool;
>
>	arcmsr_iop_init(acb);
>	pci_set_drvdata(pdev, host);
>
>	error = scsi_add_host(host, &pdev->dev);
>	if (error)
>		goto out_free_irq;
>
>	error = arcmsr_alloc_sysfs_attr(acb);
>	if (error)
>		goto out_free_sysfs;
>
>	scsi_scan_host(host);
>	return 0;
> out_free_sysfs:
> out_free_irq:
>	free_irq(pdev->irq, acb);
> out_free_ccb_pool:
>	arcmsr_free_ccb_pool(acb);
> out_iounmap:
>	iounmap(acb->pmu);
> out_release_regions:
>	pci_release_regions(pdev);
> out_host_put:
>	scsi_host_put(host);
> out_disable_device:
>	pci_disable_device(pdev);
> out:
>	return error;
>}
>
>static void arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>
>	writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, &reg->inbound_msgaddr0);
>	if (arcmsr_wait_msgint_ready(acb))
>		printk(KERN_NOTICE
>			"arcmsr%d: wait 'abort all outstanding command' timeout \n"
>			, acb->host->host_no);
>}
>
>static void arcmsr_pci_unmap_dma(struct CommandControlBlock *ccb)
>{
>	struct AdapterControlBlock *acb = ccb->acb;
>	struct scsi_cmnd *pcmd = ccb->pcmd;
>
>	if (pcmd->use_sg != 0) {
>		struct scatterlist *sl;
>
>		sl = (struct scatterlist *)pcmd->request_buffer;
>		pci_unmap_sg(acb->pdev, sl, pcmd->use_sg, pcmd->sc_data_direction);
>	}
>	else if (pcmd->request_bufflen != 0)
>		pci_unmap_single(acb->pdev,
>			pcmd->SCp.dma_handle,
>			pcmd->request_bufflen, pcmd->sc_data_direction);
>}
>
>static void arcmsr_ccb_complete(struct CommandControlBlock *ccb, int stand_flag)
>{
>	struct AdapterControlBlock *acb = ccb->acb;
>	struct scsi_cmnd *pcmd = ccb->pcmd;
>
>	arcmsr_pci_unmap_dma(ccb);
>	if (stand_flag == 1)
>		atomic_dec(&acb->ccboutstandingcount);
>	ccb->startdone = ARCMSR_CCB_DONE;
>	ccb->ccb_flags = 0;
>	list_add_tail(&ccb->list, &acb->ccb_free_list);
>	pcmd->scsi_done(pcmd);
>}
>
>static void arcmsr_remove(struct pci_dev *pdev)
>{
>	struct Scsi_Host *host = pci_get_drvdata(pdev);
>	struct AdapterControlBlock *acb =
>		(struct AdapterControlBlock *) host->hostdata;
>	struct MessageUnit __iomem *reg = acb->pmu;
>	int poll_count = 0;
>
>	arcmsr_free_sysfs_attr(acb);
>	scsi_remove_host(host);
>	arcmsr_stop_adapter_bgrb(acb);
>	arcmsr_flush_adapter_cache(acb);
>	writel(readl(&reg->outbound_intmask) |
>		ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE,
>		&reg->outbound_intmask);
>	acb->acb_flags |= ACB_F_SCSISTOPADAPTER;
>	acb->acb_flags &= ~ACB_F_IOP_INITED;
>
>	for (poll_count = 0; poll_count < 256; poll_count++) {
>		if (!atomic_read(&acb->ccboutstandingcount))
>			break;
>		arcmsr_interrupt(acb);
>		msleep(25);
>	}
>
>	if (atomic_read(&acb->ccboutstandingcount)) {
>		int i;
>
>		arcmsr_abort_allcmd(acb);
>		for (i = 0; i < ARCMSR_MAX_OUTSTANDING_CMD; i++)
>			readl(&reg->outbound_queueport);
>		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, 1);
>			}
>		}
>	}
>
>	free_irq(pdev->irq, acb);
>	iounmap(acb->pmu);
>	arcmsr_free_ccb_pool(acb);
>	pci_release_regions(pdev);
>
>	scsi_host_put(host);
>
>	pci_disable_device(pdev);
>	pci_set_drvdata(pdev, NULL);
>}
>
>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 u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	u32 orig_mask = readl(&reg->outbound_intmask);
>
>	writel(orig_mask | ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE,
>			&reg->outbound_intmask);
>	return orig_mask;
>}
>
>static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb,
>		u32 orig_mask)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	u32 mask;
>
>	mask = orig_mask & ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE |
>			     ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
>	writel(mask, &reg->outbound_intmask);
>}
>
>static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg=acb->pmu;
>
>	writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
>	if (arcmsr_wait_msgint_ready(acb))
>		printk(KERN_NOTICE
>			"arcmsr%d: wait 'flush adapter cache' timeout \n"
>			, acb->host->host_no);
>}
>
>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) < sizeof (pcmd->sense_buffer)
>			? sizeof (struct SENSE_DATA) : sizeof (pcmd->sense_buffer);
>		memset(sensebuffer, 0, sizeof (pcmd->sense_buffer));
>		memcpy(sensebuffer, ccb->arcmsr_cdb.SenseData, sense_data_length);
>		sensebuffer->ErrorCode = SCSI_SENSE_CURRENT_ERRORS;
>		sensebuffer->Valid = 1;
>	}
>}
>
>static uint8_t arcmsr_wait_msgint_ready(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	uint32_t Index;
>	uint8_t Retries = 0x00;
>
>	do {
>		for (Index = 0; Index < 100; Index++) {
>			if (readl(&reg->outbound_intstatus)
>				& ARCMSR_MU_OUTBOUND_MESSAGE0_INT) {
>				writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT
>					, &reg->outbound_intstatus);
>				return 0x00;
>			}
>			msleep_interruptible(10);
>		}/*max 1 seconds*/
>	} while (Retries++ < 20);/*max 20 sec*/
>	return 0xff;
>}
>
>static void 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;
>	uint32_t address_lo, address_hi;
>	int arccdbsize = 0x30;
>
>	ccb->pcmd = pcmd;
>	memset(arcmsr_cdb, 0, sizeof (struct ARCMSR_CDB));
>	arcmsr_cdb->Bus = 0;
>	arcmsr_cdb->TargetID = pcmd->device->id;
>	arcmsr_cdb->LUN = pcmd->device->lun;
>	arcmsr_cdb->Function = 1;
>	arcmsr_cdb->CdbLength = (uint8_t)pcmd->cmd_len;
>	arcmsr_cdb->Context = (unsigned long)arcmsr_cdb;
>	memcpy(arcmsr_cdb->Cdb, pcmd->cmnd, pcmd->cmd_len);
>	if (pcmd->use_sg) {
>		int length, sgcount, i, cdb_sgcount = 0;
>		struct scatterlist *sl;
>
>		/* Get Scatter Gather List from scsiport. */
>		sl = (struct scatterlist *) pcmd->request_buffer;
>		sgcount = pci_map_sg(acb->pdev, sl, pcmd->use_sg,
>				pcmd->sc_data_direction);
>		/* map stor port SG list to our iop SG List. */
>		for (i = 0; i < sgcount; i++) {
>			/* Get the physical address of the current data pointer */
>			length = cpu_to_le32(sg_dma_len(sl));
>			address_lo = cpu_to_le32(dma_addr_lo32(sg_dma_address(sl)));
>			address_hi = cpu_to_le32(dma_addr_hi32(sg_dma_address(sl)));
>			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|IS_SG64_ADDR;
>				psge += sizeof (struct SG64ENTRY);
>				arccdbsize += sizeof (struct SG64ENTRY);
>			}
>			sl++;
>			cdb_sgcount++;
>		}
>		arcmsr_cdb->sgcount = (uint8_t)cdb_sgcount;
>		arcmsr_cdb->DataLength = pcmd->request_bufflen;
>		if ( arccdbsize > 256)
>			arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_SGL_BSIZE;
>	} else if (pcmd->request_bufflen) {
>		dma_addr_t dma_addr;
>		dma_addr = pci_map_single(acb->pdev, pcmd->request_buffer,
>				pcmd->request_bufflen, pcmd->sc_data_direction);
>		pcmd->SCp.dma_handle = dma_addr;
>		address_lo = cpu_to_le32(dma_addr_lo32(dma_addr));
>		address_hi = cpu_to_le32(dma_addr_hi32(dma_addr));
>		if (address_hi == 0) {
>			struct  SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
>			pdma_sg->address = address_lo;
>			pdma_sg->length = pcmd->request_bufflen;
>		} else {
>			struct SG64ENTRY *pdma_sg = (struct SG64ENTRY *)psge;
>			pdma_sg->addresshigh = address_hi;
>			pdma_sg->address = address_lo;
>			pdma_sg->length = pcmd->request_bufflen|IS_SG64_ADDR;
>		}
>		arcmsr_cdb->sgcount = 1;
>		arcmsr_cdb->DataLength = pcmd->request_bufflen;
>	}
>	if (pcmd->sc_data_direction == DMA_TO_DEVICE ) {
>		arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_WRITE;
>		ccb->ccb_flags |= CCB_FLAG_WRITE;
>	}
>}
>
>static void arcmsr_post_ccb(struct AdapterControlBlock *acb, struct CommandControlBlock *ccb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	uint32_t cdb_shifted_phyaddr = ccb->cdb_shifted_phyaddr;
>	struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
>
>	atomic_inc(&acb->ccboutstandingcount);
>	ccb->startdone = ARCMSR_CCB_START;
>	if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE)
>		writel(cdb_shifted_phyaddr | ARCMSR_CCBPOST_FLAG_SGL_BSIZE,
>			&reg->inbound_queueport);
>	else
>		writel(cdb_shifted_phyaddr, &reg->inbound_queueport);
>}
>
>void arcmsr_post_Qbuffer(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	struct QBUFFER __iomem *pwbuffer = (struct QBUFFER __iomem *) &reg->message_wbuffer;
>	uint8_t __iomem *iop_data = (uint8_t __iomem *) pwbuffer->data;
>	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)) {
>			writeb(acb->wqbuffer[acb->wqbuf_firstindex], iop_data);
>			acb->wqbuf_firstindex++;
>			acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
>			iop_data++;
>			allxfer_len++;
>		}
>		writel(allxfer_len, &pwbuffer->data_len);
>		writel(ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK
>			, &reg->inbound_doorbell);
>	}
>}
>
>static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>
>	acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
>	writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, &reg->inbound_msgaddr0);
>	if (arcmsr_wait_msgint_ready(acb))
>		printk(KERN_NOTICE
>			"arcmsr%d: wait 'stop adapter background rebulid' timeout \n"
>			, acb->host->host_no);
>}
>
>static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb)
>{
>	dma_free_coherent(&acb->pdev->dev,
>		ARCMSR_MAX_FREECCB_NUM * sizeof (struct CommandControlBlock) + 0x20,
>		acb->dma_coherent,
>		acb->dma_coherent_handle);
>}
>
>static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	struct CommandControlBlock *ccb;
>	uint32_t flag_ccb, outbound_intstatus, outbound_doorbell;
>
>	outbound_intstatus = readl(&reg->outbound_intstatus)
>		& acb->outbound_int_enable;
>	writel(outbound_intstatus, &reg->outbound_intstatus);
>	if (outbound_intstatus & ARCMSR_MU_OUTBOUND_DOORBELL_INT) {
>		outbound_doorbell = readl(&reg->outbound_doorbell);
>		writel(outbound_doorbell, &reg->outbound_doorbell);
>		if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK) {
>			struct QBUFFER __iomem * prbuffer =
>				(struct QBUFFER __iomem *) &reg->message_rbuffer;
>			uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data;
>			int32_t my_empty_len, iop_len, rqbuf_firstindex, rqbuf_lastindex;
>
>			rqbuf_lastindex = acb->rqbuf_lastindex;
>			rqbuf_firstindex = acb->rqbuf_firstindex;
>			iop_len = readl(&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) {
>					acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
>					acb->rqbuf_lastindex++;
>					acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
>					iop_data++;
>					iop_len--;
>				}
>				writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
>					&reg->inbound_doorbell);
>			} 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) {
>				struct QBUFFER __iomem * pwbuffer =
>						(struct QBUFFER __iomem *) &reg->message_wbuffer;
>				uint8_t __iomem * iop_data = (uint8_t __iomem *) pwbuffer->data;
>				int32_t allxfer_len = 0;
>
>				acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
>				while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex)
>					&& (allxfer_len < 124)) {
>					writeb(acb->wqbuffer[acb->wqbuf_firstindex], iop_data);
>					acb->wqbuf_firstindex++;
>					acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
>					iop_data++;
>					allxfer_len++;
>				}
>				writel(allxfer_len, &pwbuffer->data_len);
>				writel(ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK,
>					&reg->inbound_doorbell);
>			}
>			if (acb->wqbuf_firstindex == acb->wqbuf_lastindex)
>				acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
>		}
>	}
>	if (outbound_intstatus & ARCMSR_MU_OUTBOUND_POSTQUEUE_INT) {
>		int id, lun;
>		/*
>		****************************************************************
>		**               areca cdb command done
>		****************************************************************
>		*/
>		while (1) {
>			if ((flag_ccb = readl(&reg->outbound_queueport)) == 0xFFFFFFFF)
>				break;/*chip FIFO no ccb for completion already*/
>			/* check if command done with no error*/
>			ccb = (struct CommandControlBlock *)(acb->vir2phy_offset +
>				(flag_ccb << 5));
>			if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
>				if (ccb->startdone == ARCMSR_CCB_ABORTED) {
>					struct scsi_cmnd *abortcmd=ccb->pcmd;
>					if (abortcmd) {
>					abortcmd->result |= DID_ABORT >> 16;
>					arcmsr_ccb_complete(ccb, 1);
>					printk(KERN_NOTICE
>						"arcmsr%d: ccb='0x%p' isr got aborted command \n"
>						, acb->host->host_no, ccb);
>					}
>					continue;
>				}
>				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
>					, ccb
>					, ccb->acb
>					, ccb->startdone
>					, atomic_read(&acb->ccboutstandingcount));
>				continue;
>			}
>			id = ccb->pcmd->device->id;
>			lun = ccb->pcmd->device->lun;
>			if (!(flag_ccb & ARCMSR_CCBREPLY_FLAG_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, 1);
>			} else {
>				switch(ccb->arcmsr_cdb.DeviceStatus) {
>				case ARCMSR_DEV_SELECT_TIMEOUT: {
>						acb->devstate[id][lun] = ARECA_RAID_GONE;
>						ccb->pcmd->result = DID_TIME_OUT << 16;
>						arcmsr_ccb_complete(ccb, 1);
>					}
>					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, 1);
>					}
>					break;
>				case ARCMSR_DEV_CHECK_CONDITION: {
>						acb->devstate[id][lun] = ARECA_RAID_GOOD;
>						arcmsr_report_sense_info(ccb);
>						arcmsr_ccb_complete(ccb, 1);
>					}
>					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, 1);
>					break;
>				}
>			}
>		}/*drain reply FIFO*/
>	}
>	if (!(outbound_intstatus & ARCMSR_MU_OUTBOUND_HANDLE_INT))
>		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) {
>			acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
>			arcmsr_stop_adapter_bgrb(acb);
>			arcmsr_flush_adapter_cache(acb);
>		}
>	}
>}
>
>static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, struct scsi_cmnd *cmd)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	struct CMD_MESSAGE_FIELD *pcmdmessagefld;
>	int retvalue = 0, transfer_len = 0;
>	char *buffer;
>	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 */
>	if (cmd->use_sg) {
>		struct scatterlist *sg = (struct scatterlist *)cmd->request_buffer;
>
>		buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
>		if (cmd->use_sg > 1) {
>			retvalue = ARCMSR_MESSAGE_FAIL;
>			goto message_out;
>		}
>		transfer_len += sg->length;
>	} else {
>		buffer = cmd->request_buffer;
>		transfer_len = cmd->request_bufflen;
>	}
>	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 long *ver_addr;
>			dma_addr_t buf_handle;
>			uint8_t *pQbuffer, *ptmpQbuffer;
>			int32_t allxfer_len = 0;
>
>			ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
>			if (!ver_addr) {
>				retvalue = ARCMSR_MESSAGE_FAIL;
>				goto message_out;
>			}
>			ptmpQbuffer = (uint8_t *) 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 = (struct QBUFFER __iomem *)
>							&reg->message_rbuffer;
>				uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data;
>				int32_t iop_len;
>
>				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
>				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--;
>				}
>				writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
>						&reg->inbound_doorbell);
>			}
>			memcpy(pcmdmessagefld->messagedatabuffer,
>				(uint8_t *)ver_addr, allxfer_len);
>			pcmdmessagefld->cmdmessage.Length = allxfer_len;
>			pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
>			pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
>		}
>		break;
>	case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
>			unsigned long *ver_addr;
>			dma_addr_t buf_handle;
>			int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
>			uint8_t *pQbuffer, *ptmpuserbuffer;
>
>			ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
>			if (!ver_addr) {
>				retvalue = ARCMSR_MESSAGE_FAIL;
>				goto message_out;
>			}
>			ptmpuserbuffer = (uint8_t *)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_Qbuffer(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_Qbuffer(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;
>				}
>			}
>			pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
>		}
>		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;
>				writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
>					&reg->inbound_doorbell);
>			}
>			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: {
>			uint8_t *pQbuffer = acb->wqbuffer;
>
>			if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
>				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
>				writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK
>						, &reg->inbound_doorbell);
>			}
>			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: {
>			uint8_t *pQbuffer;
>
>			if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
>				acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
>				writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK
>						, &reg->inbound_doorbell);
>			}
>			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_RETURN_CODE_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:
>	if (cmd->use_sg) {
>		struct scatterlist *sg;
>
>		sg = (struct scatterlist *) cmd->request_buffer;
>		kunmap_atomic(buffer - sg->offset, KM_IRQ0);
>	}
>	return retvalue;
>}
>
>static struct CommandControlBlock *arcmsr_get_freeccb(struct AdapterControlBlock *acb)
>{
>	struct list_head *head = &acb->ccb_free_list;
>	struct CommandControlBlock *ccb = NULL;
>
>	if (!list_empty(head)) {
>		ccb = list_entry(head->next, struct CommandControlBlock, list);
>		list_del(head->next);
>	}
>	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;
>
>		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 */
>		if (cmd->use_sg) {
>			struct scatterlist *sg;
>
>			sg = (struct scatterlist *) cmd->request_buffer;
>			buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
>		} else {
>			buffer = cmd->request_buffer;
>		}
>		memcpy(buffer, inqdata, sizeof(inqdata));
>		if (cmd->use_sg) {
>			struct scatterlist *sg;
>
>			sg = (struct scatterlist *) cmd->request_buffer;
>			kunmap_atomic(buffer - sg->offset, KM_IRQ0);
>		}
>		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(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;
>
>	cmd->scsi_done = done;
>	cmd->host_scribble = NULL;
>	cmd->result = 0;
>	if (acb->acb_flags & ACB_F_BUS_RESET) {
>		printk(KERN_NOTICE "arcmsr%d: bus reset"
>			" and return busy \n"
>			, acb->host->host_no);
>		return SCSI_MLQUEUE_HOST_BUSY;
>	}
>	if(target == 16) {
>		/* virtual device for iop message transfer */
>		arcmsr_handle_virtual_command(acb, cmd);
>		return 0;
>	}
>	if (acb->devstate[target][lun] == ARECA_RAID_GONE) {
>		uint8_t block_cmd;
>
>		block_cmd = cmd->cmnd[0] & 0x0f;
>		if (block_cmd == 0x08 || block_cmd == 0x0a) {
>			printk(KERN_NOTICE
>				"arcmsr%d: block 'read/write'"
>				"command with gone raid volume"
>				" Cmd=%2x, TargetId=%d, Lun=%d \n"
>				, acb->host->host_no
>				, cmd->cmnd[0]
>				, target, lun);
>			cmd->result = (DID_NO_CONNECT << 16);
>			cmd->scsi_done(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;
>	arcmsr_build_ccb(acb, ccb, cmd);
>	arcmsr_post_ccb(acb, ccb);
>	return 0;
>}
>
>static void arcmsr_get_firmware_spec(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	char *acb_firm_model = acb->firm_model;
>	char *acb_firm_version = acb->firm_version;
>	char __iomem *iop_firm_model = (char __iomem *) &reg->message_rwbuffer[15];
>	char __iomem *iop_firm_version = (char __iomem *) &reg->message_rwbuffer[17];
>	int count;
>
>	writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
>	if (arcmsr_wait_msgint_ready(acb))
>		printk(KERN_NOTICE
>			"arcmsr%d: wait "
>			"'get adapter firmware miscellaneous data' timeout \n"
>			, acb->host->host_no);
>	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_INFO
>		"ARECA RAID ADAPTER%d: FIRMWARE VERSION %s \n"
>		, acb->host->host_no
>		, acb->firm_version);
>	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]);
>}
>
>static void arcmsr_polling_ccbdone(struct AdapterControlBlock *acb,
>	struct CommandControlBlock *poll_ccb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	struct CommandControlBlock *ccb;
>	uint32_t flag_ccb, outbound_intstatus, poll_ccb_done = 0, poll_count = 0;
>	int id, lun;
>
> polling_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)
>				break;
>			else {
>				msleep(25);
>				if (poll_count > 100)
>					break;
>				goto polling_ccb_retry;
>			}
>		}
>		ccb = (struct CommandControlBlock *)
>			(acb->vir2phy_offset + (flag_ccb << 5));
>		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, 1);
>				poll_ccb_done = 1;
>				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;
>		}
>		id = ccb->pcmd->device->id;
>		lun = ccb->pcmd->device->lun;
>		if (!(flag_ccb & ARCMSR_CCBREPLY_FLAG_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, 1);
>		} else {
>			switch(ccb->arcmsr_cdb.DeviceStatus) {
>			case ARCMSR_DEV_SELECT_TIMEOUT: {
>					acb->devstate[id][lun] = ARECA_RAID_GONE;
>					ccb->pcmd->result = DID_TIME_OUT << 16;
>					arcmsr_ccb_complete(ccb, 1);
>				}
>				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, 1);
>				}
>				break;
>			case ARCMSR_DEV_CHECK_CONDITION: {
>					acb->devstate[id][lun] = ARECA_RAID_GOOD;
>					arcmsr_report_sense_info(ccb);
>					arcmsr_ccb_complete(ccb, 1);
>				}
>				break;
>			default:
>				printk(KERN_NOTICE
>					"arcmsr%d: scsi id=%d lun=%d"
>					" polling and getting 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_BAD_TARGET << 16;
>				arcmsr_ccb_complete(ccb, 1);
>				break;
>			}
>		}
>	}
>}
>
>static void arcmsr_iop_init(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	uint32_t intmask_org, mask, outbound_doorbell, firmware_state = 0;
>
>	do {
>		firmware_state = readl(&reg->outbound_msgaddr1);
>	} while (!(firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK));
>	intmask_org = readl(&reg->outbound_intmask)
>			| ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE;
>	arcmsr_get_firmware_spec(acb);
>
>	acb->acb_flags |= ACB_F_MSG_START_BGRB;
>	writel(ARCMSR_INBOUND_MESG0_START_BGRB, &reg->inbound_msgaddr0);
>	if (arcmsr_wait_msgint_ready(acb)) {
>		printk(KERN_NOTICE "arcmsr%d: "
>			"wait 'start adapter background rebulid' timeout\n",
>			acb->host->host_no);
>	}
>
>	outbound_doorbell = readl(&reg->outbound_doorbell);
>	writel(outbound_doorbell, &reg->outbound_doorbell);
>	writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
>	mask = ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE
>			| ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
>	writel(intmask_org & mask, &reg->outbound_intmask);
>	acb->outbound_int_enable = ~(intmask_org & mask) & 0x000000ff;
>	acb->acb_flags |= ACB_F_IOP_INITED;
>}
>
>static void arcmsr_iop_reset(struct AdapterControlBlock *acb)
>{
>	struct MessageUnit __iomem *reg = acb->pmu;
>	struct CommandControlBlock *ccb;
>	uint32_t intmask_org;
>	int i = 0;
>
>	if (atomic_read(&acb->ccboutstandingcount) != 0) {
>		/* talk to iop 331 outstanding command aborted */
>		arcmsr_abort_allcmd(acb);
>		/* wait for 3 sec for all command aborted*/
>		msleep_interruptible(3000);
>		/* disable all outbound interrupt */
>		intmask_org = arcmsr_disable_outbound_ints(acb);
>		/* clear all outbound posted Q */
>		for (i = 0; i < ARCMSR_MAX_OUTSTANDING_CMD; i++)
>			readl(&reg->outbound_queueport);
>		for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
>			ccb = acb->pccb_pool[i];
>			if ((ccb->startdone == ARCMSR_CCB_START) ||
>				(ccb->startdone == ARCMSR_CCB_ABORTED)) {
>				ccb->startdone = ARCMSR_CCB_ABORTED;
>				ccb->pcmd->result = DID_ABORT << 16;
>				arcmsr_ccb_complete(ccb, 1);
>			}
>		}
>		/* enable all outbound interrupt */
>		arcmsr_enable_outbound_ints(acb, intmask_org);
>	}
>	atomic_set(&acb->ccboutstandingcount, 0);
>}
>
>static int arcmsr_bus_reset(struct scsi_cmnd *cmd)
>{
>	struct AdapterControlBlock *acb =(struct AdapterControlBlock *)cmd->device->host->hostdata;
>	int i;
>
>	acb->num_resets++;
>	acb->acb_flags |= ACB_F_BUS_RESET;
>	for (i = 0; i < 400; i++) {
>		if (!atomic_read(&acb->ccboutstandingcount))
>			break;
>		arcmsr_interrupt(acb);
>		msleep(25);
>	}
>	arcmsr_iop_reset(acb);
>	acb->acb_flags &= ~ACB_F_BUS_RESET;
>	return SUCCESS;
>}
>
>static void arcmsr_abort_one_cmd(struct AdapterControlBlock *acb,
>		struct CommandControlBlock *ccb)
>{
>	u32 intmask;
>
>	ccb->startdone = ARCMSR_CCB_ABORTED;
>
>	/*
>	** Wait for 3 sec for all command done.
>	*/
>	msleep_interruptible(3000);
>
>	intmask = arcmsr_disable_outbound_ints(acb);
>	arcmsr_polling_ccbdone(acb, ccb);
>	arcmsr_enable_outbound_ints(acb, intmask);
>}
>
>static int arcmsr_abort(struct scsi_cmnd *cmd)
>{
>	struct AdapterControlBlock *acb =
>		(struct AdapterControlBlock *)cmd->device->host->hostdata;
>	int i = 0;
>
>	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->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 SUCCESS;
>
>	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) {
>			arcmsr_abort_one_cmd(acb, ccb);
>			break;
>		}
>	}
>
>	return SUCCESS;
>}
>
>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_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_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:
>		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;
>}
>
>

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Attachments on bug 428801: 291703 | 294727 | 294728 | 295784 | 296175 | 296695 | 296981 | 297765 | 308180