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  ** 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

  ** 1.20.00.14   05/02/2007	 Erich Chen & Nick Cheng
  **						1.implement PCI-Express error recovery function and AER capability
  **						2.implement the selection of ARCMSR_MAX_XFER_SECTORS_B=4096
  **				 		if firmware version is newer than 1.42
  **						3.modify arcmsr_iop_reset to improve the ability
  **						4.modify the ISR, arcmsr_interrupt routine,to prevent the
  **						inconsistency with sg_mod driver if application	directly calls
  **						the arcmsr driver w/o passing through scsi mid layer
  **						specially thanks to Yanmin Zhang's openhanded help about AER
  ** 1.20.00.15   08/30/2007	 Erich Chen & Nick Cheng
  **						1. support ARC1200/1201/1202 SATA RAID adapter, which is named
  **						ACB_ADAPTER_TYPE_B
  **						2. modify the arcmsr_pci_slot_reset function
  **						3. modify the arcmsr_pci_ers_disconnect_forepart function
  **						4. modify the arcmsr_pci_ers_need_reset_forepart function

  ** 1.20.00.15   09/27/2007	 Erich Chen & Nick Cheng
  **						1. add arcmsr_enable_eoi_mode() on adapter Type B
  ** 						2. add readl(reg->iop2drv_doorbell_reg) in arcmsr_handle_hbb_isr()
  **						in case of the doorbell interrupt clearance is cached
  ** 1.20.00.15   10/01/2007	 Erich Chen & Nick Cheng
  **						1. modify acb->devstate[i][j]
  **						as ARECA_RAID_GOOD instead of
  **						ARECA_RAID_GONE in arcmsr_alloc_ccb_pool
  ** 1.20.00.15   11/06/2007       Erich Chen & Nick Cheng
  **						1. add conditional declaration for
  ** 						arcmsr_pci_error_detected() and
  **						arcmsr_pci_slot_reset
  ** 1.20.00.15	11/23/2007       Erich Chen & Nick Cheng
  **						1.check if the sg list member number
  **						exceeds arcmsr default limit in arcmsr_build_ccb()
  **						2.change the returned value type of arcmsr_build_ccb()
  **						from "void" to "int"
  **						3.add the conditional check if arcmsr_build_ccb()
  **						returns FAILED
  ** 1.20.00.15	12/04/2007	 Erich Chen & Nick Cheng
  **						1. modify arcmsr_drain_donequeue() to ignore unknown
  **						command and let kernel process command timeout.
  **						This could handle IO request violating max. segments
  **						while Linux XFS over DM-CRYPT.
  **						Thanks to Milan Broz's comments <mbroz@redhat.com>
  ** 1.20.00.15	12/24/2007	 Erich Chen & Nick Cheng
  **						1.fix the portability problems
  **						2.fix type B where we should _not_ iounmap() acb->pmu;
  **						it's not ioremapped.
  **						3.add return -ENOMEM if ioremap() fails
  **						4.transfer IS_SG64_ADDR w/ cpu_to_le32()
  **						in arcmsr_build_ccb
  **						5. modify acb->devstate[i][j] as ARECA_RAID_GONE instead of
  **						ARECA_RAID_GOOD in arcmsr_alloc_ccb_pool()
  **						6.fix arcmsr_cdb->Context as (unsigned long)arcmsr_cdb
  **						7.add the checking state of
  **						(outbound_intstatus & ARCMSR_MU_OUTBOUND_HANDLE_INT) == 0
  **						in arcmsr_handle_hba_isr
  **						8.replace pci_alloc_consistent()/pci_free_consistent() with kmalloc()/kfree() in arcmsr_iop_message_xfer()
  **						9. fix the release of dma memory for type B in arcmsr_free_ccb_pool()
  **						10.fix the arcmsr_polling_hbb_ccbdone()

  ** 1.20.00.15	02/27/2008	Erich Chen & Nick Cheng
  **						1.arcmsr_iop_message_xfer() is called from atomic context under the
  **						queuecommand scsi_host_template handler. James Bottomley pointed out
  **						that the current GFP_KERNEL|GFP_DMA flags are wrong: firstly we are in
  **						atomic context, secondly this memory is not used for DMA.
  **						Also removed some unneeded casts. Thanks to Daniel Drake <dsd@gentoo.org>

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