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** History
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**
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** REV# DATE NAME DESCRIPTION
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** 1.00.00.00 3/31/2004 Erich Chen First release
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** 1.10.00.04 7/28/2004 Erich Chen modify for ioctl
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** 1.10.00.06 8/28/2004 Erich Chen modify for 2.6.x
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** 1.10.00.08 9/28/2004 Erich Chen modify for x86_64
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** 1.10.00.10 10/10/2004 Erich Chen bug fix for SMP & ioctl
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** 1.20.00.00 11/29/2004 Erich Chen bug fix with arcmsr_bus_reset when PHY error
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** 1.20.00.02 12/09/2004 Erich Chen bug fix with over 2T bytes RAID Volume
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** 1.20.00.04 1/09/2005 Erich Chen fits for Debian linux kernel version 2.2.xx
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** 1.20.00.05 2/20/2005 Erich Chen cleanly as look like a Linux driver at 2.6.x
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** thanks for peoples kindness comment
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** Kornel Wieliczek
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** Christoph Hellwig
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** Adrian Bunk
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** Andrew Morton
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** Christoph Hellwig
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** James Bottomley
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** Arjan van de Ven
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** 1.20.00.06 3/12/2005 Erich Chen fix with arcmsr_pci_unmap_dma "unsigned long" cast,
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** modify PCCB POOL allocated by "dma_alloc_coherent"
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** (Kornel Wieliczek's comment)
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** 1.20.00.07 3/23/2005 Erich Chen bug fix with arcmsr_scsi_host_template_init
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** occur segmentation fault,
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** if RAID adapter does not on PCI slot
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** and modprobe/rmmod this driver twice.
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** bug fix enormous stack usage (Adrian Bunk's comment)
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** 1.20.00.08 6/23/2005 Erich Chen bug fix with abort command,
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** in case of heavy loading when sata cable
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** working on low quality connection
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** 1.20.00.09 9/12/2005 Erich Chen bug fix with abort command handling, firmware version check
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** and firmware update notify for hardware bug fix
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** 1.20.00.10 9/23/2005 Erich Chen enhance sysfs function for change driver's max tag Q number.
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** add DMA_64BIT_MASK for backward compatible with all 2.6.x
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** add some useful message for abort command
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** add ioctl code 'ARCMSR_IOCTL_FLUSH_ADAPTER_CACHE'
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** customer can send this command for sync raid volume data
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** 1.20.00.11 9/29/2005 Erich Chen by comment of Arjan van de Ven fix incorrect msleep redefine
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** cast off sizeof(dma_addr_t) condition for 64bit pci_set_dma_mask
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** 1.20.00.12 9/30/2005 Erich Chen bug fix with 64bit platform's ccbs using if over 4G system memory
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** change 64bit pci_set_consistent_dma_mask into 32bit
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** increcct adapter count if adapter initialize fail.
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** miss edit at arcmsr_build_ccb....
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** psge += sizeof(struct _SG64ENTRY *) =>
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** psge += sizeof(struct _SG64ENTRY)
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** 64 bits sg entry would be incorrectly calculated
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** thanks Kornel Wieliczek give me kindly notify
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** and detail description
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** 1.20.00.13 11/15/2005 Erich Chen scheduling pending ccb with FIFO
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** change the architecture of arcmsr command queue list
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** for linux standard list
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** enable usage of pci message signal interrupt
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** follow Randy.Danlup kindness suggestion cleanup this code
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** 1.20.00.14 05/02/2007 Erich Chen & Nick Cheng
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** 1.implement PCI-Express error recovery function and AER capability
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** 2.implement the selection of ARCMSR_MAX_XFER_SECTORS_B=4096
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** if firmware version is newer than 1.42
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** 3.modify arcmsr_iop_reset to improve the ability
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** 4.modify the ISR, arcmsr_interrupt routine,to prevent the
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** inconsistency with sg_mod driver if application directly calls
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** the arcmsr driver w/o passing through scsi mid layer
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** specially thanks to Yanmin Zhang's openhanded help about AER
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** 1.20.00.15 08/30/2007 Erich Chen & Nick Cheng
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** 1. support ARC1200/1201/1202 SATA RAID adapter, which is named
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** ACB_ADAPTER_TYPE_B
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** 2. modify the arcmsr_pci_slot_reset function
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** 3. modify the arcmsr_pci_ers_disconnect_forepart function
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** 4. modify the arcmsr_pci_ers_need_reset_forepart function
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** 1.20.00.15 09/27/2007 Erich Chen & Nick Cheng
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** 1. add arcmsr_enable_eoi_mode() on adapter Type B
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** 2. add readl(reg->iop2drv_doorbell_reg) in arcmsr_handle_hbb_isr()
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** in case of the doorbell interrupt clearance is cached
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** 1.20.00.15 10/01/2007 Erich Chen & Nick Cheng
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** 1. modify acb->devstate[i][j]
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** as ARECA_RAID_GOOD instead of
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** ARECA_RAID_GONE in arcmsr_alloc_ccb_pool
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** 1.20.00.15 11/06/2007 Erich Chen & Nick Cheng
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** 1. add conditional declaration for
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** arcmsr_pci_error_detected() and
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** arcmsr_pci_slot_reset
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** 1.20.00.15 11/23/2007 Erich Chen & Nick Cheng
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** 1.check if the sg list member number
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** exceeds arcmsr default limit in arcmsr_build_ccb()
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** 2.change the returned value type of arcmsr_build_ccb()
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** from "void" to "int"
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** 3.add the conditional check if arcmsr_build_ccb()
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** returns FAILED
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** 1.20.00.15 12/04/2007 Erich Chen & Nick Cheng
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** 1. modify arcmsr_drain_donequeue() to ignore unknown
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** command and let kernel process command timeout.
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** This could handle IO request violating max. segments
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** while Linux XFS over DM-CRYPT.
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** Thanks to Milan Broz's comments <mbroz@redhat.com>
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** 1.20.00.15 12/24/2007 Erich Chen & Nick Cheng
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** 1.fix the portability problems
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** 2.fix type B where we should _not_ iounmap() acb->pmu;
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** it's not ioremapped.
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** 3.add return -ENOMEM if ioremap() fails
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** 4.transfer IS_SG64_ADDR w/ cpu_to_le32()
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** in arcmsr_build_ccb
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** 5. modify acb->devstate[i][j] as ARECA_RAID_GONE instead of
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** ARECA_RAID_GOOD in arcmsr_alloc_ccb_pool()
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** 6.fix arcmsr_cdb->Context as (unsigned long)arcmsr_cdb
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** 7.add the checking state of
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** (outbound_intstatus & ARCMSR_MU_OUTBOUND_HANDLE_INT) == 0
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** in arcmsr_handle_hba_isr
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** 8.replace pci_alloc_consistent()/pci_free_consistent() with kmalloc()/kfree() in arcmsr_iop_message_xfer()
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** 9. fix the release of dma memory for type B in arcmsr_free_ccb_pool()
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** 10.fix the arcmsr_polling_hbb_ccbdone()
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** 1.20.00.15 02/27/2008 Erich Chen & Nick Cheng
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** 1.arcmsr_iop_message_xfer() is called from atomic context under the
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** queuecommand scsi_host_template handler. James Bottomley pointed out
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** that the current GFP_KERNEL|GFP_DMA flags are wrong: firstly we are in
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** atomic context, secondly this memory is not used for DMA.
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** Also removed some unneeded casts. Thanks to Daniel Drake <dsd@gentoo.org>
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**************************************************************************
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