Initial import

1 files changed, 2578 insertions, 0 deletions

diff --git a/drivers/scsi/eata.c b/drivers/scsi/eata.c
new file mode 100644
index 000000000..227dd2c2e
--- /dev/null
+++ b/drivers/scsi/eata.c
@@ -0,0 +1,2578 @@
+/*
+ *      eata.c - Low-level driver for EATA/DMA SCSI host adapters.
+ *
+ *      03 Jun 2003 Rev. 8.10 for linux-2.5.70
+ *        + Update for new IRQ API.
+ *        + Use "goto" when appropriate.
+ *        + Drop eata.h.
+ *        + Update for new module_param API.
+ *        + Module parameters  can now be specified only in the
+ *          same format as the kernel boot options.
+ *
+ *             boot option    old module param 
+ *             -----------    ------------------
+ *             addr,...       io_port=addr,...
+ *             lc:[y|n]       linked_comm=[1|0]
+ *             mq:xx          max_queue_depth=xx
+ *             tm:[0|1|2]     tag_mode=[0|1|2]
+ *             et:[y|n]       ext_tran=[1|0]
+ *             rs:[y|n]       rev_scan=[1|0]
+ *             ip:[y|n]       isa_probe=[1|0]
+ *             ep:[y|n]       eisa_probe=[1|0]
+ *             pp:[y|n]       pci_probe=[1|0]
+ *
+ *          A valid example using the new parameter format is:
+ *          modprobe eata "eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n"
+ *
+ *          which is equivalent to the old format:
+ *          modprobe eata io_port=0x7410,0x230 linked_comm=1 tag_mode=0 \
+ *                        max_queue_depth=4 eisa_probe=0
+ *
+ *      12 Feb 2003 Rev. 8.04 for linux 2.5.60
+ *        + Release irq before calling scsi_register.
+ *
+ *      12 Nov 2002 Rev. 8.02 for linux 2.5.47
+ *        + Release driver_lock before calling scsi_register.
+ *
+ *      11 Nov 2002 Rev. 8.01 for linux 2.5.47
+ *        + Fixed bios_param and scsicam_bios_param calling parameters.
+ *
+ *      28 Oct 2002 Rev. 8.00 for linux 2.5.44-ac4
+ *        + Use new tcq and adjust_queue_depth api.
+ *        + New command line option (tm:[0-2]) to choose the type of tags:
+ *          0 -> disable tagging ; 1 -> simple tags  ; 2 -> ordered tags.
+ *          Default is tm:0 (tagged commands disabled).
+ *          For compatibility the "tc:" option is an alias of the "tm:"
+ *          option; tc:n is equivalent to tm:0 and tc:y is equivalent to
+ *          tm:1.
+ *        + The tagged_comm module parameter has been removed, use tag_mode
+ *          instead, equivalent to the "tm:" boot option.
+ *
+ *      10 Oct 2002 Rev. 7.70 for linux 2.5.42
+ *        + Foreport from revision 6.70.
+ *
+ *      25 Jun 2002 Rev. 6.70 for linux 2.4.19
+ *        + This release is the first one tested on a Big Endian platform:
+ *          fixed endian-ness problem due to bitfields;
+ *          fixed endian-ness problem in read_pio.
+ *        + Added new options for selectively probing ISA, EISA and PCI bus:
+ *
+ *          Boot option   Parameter name    Default according to
+ *
+ *          ip:[y|n]      isa_probe=[1|0]   CONFIG_ISA  defined
+ *          ep:[y|n]      eisa_probe=[1|0]  CONFIG_EISA defined
+ *          pp:[y|n]      pci_probe=[1|0]   CONFIG_PCI  defined
+ *
+ *          The default action is to perform probing if the corresponding
+ *          bus is configured and to skip probing otherwise.
+ *
+ *        + If pci_probe is in effect and a list of I/O  ports is specified
+ *          as parameter or boot option, pci_enable_device() is performed
+ *          on all pci devices matching PCI_CLASS_STORAGE_SCSI.
+ *
+ *      21 Feb 2002 Rev. 6.52 for linux 2.4.18
+ *        + Backport from rev. 7.22 (use io_request_lock).
+ *
+ *      20 Feb 2002 Rev. 7.22 for linux 2.5.5
+ *        + Remove any reference to virt_to_bus().
+ *        + Fix pio hang while detecting multiple HBAs.
+ *        + Fixed a board detection bug: in a system with
+ *          multiple ISA/EISA boards, all but the first one
+ *          were erroneously detected as PCI.
+ *
+ *      01 Jan 2002 Rev. 7.20 for linux 2.5.1
+ *        + Use the dynamic DMA mapping API.
+ *
+ *      19 Dec 2001 Rev. 7.02 for linux 2.5.1
+ *        + Use SCpnt->sc_data_direction if set.
+ *        + Use sglist.page instead of sglist.address.
+ *
+ *      11 Dec 2001 Rev. 7.00 for linux 2.5.1
+ *        + Use host->host_lock instead of io_request_lock.
+ *
+ *       1 May 2001 Rev. 6.05 for linux 2.4.4
+ *        + Clean up all pci related routines.
+ *        + Fix data transfer direction for opcode SEND_CUE_SHEET (0x5d)
+ *
+ *      30 Jan 2001 Rev. 6.04 for linux 2.4.1
+ *        + Call pci_resource_start after pci_enable_device.
+ *
+ *      25 Jan 2001 Rev. 6.03 for linux 2.4.0
+ *        + "check_region" call replaced by "request_region".
+ *
+ *      22 Nov 2000 Rev. 6.02 for linux 2.4.0-test11
+ *        + Return code checked when calling pci_enable_device.
+ *        + Removed old scsi error handling support.
+ *        + The obsolete boot option flag eh:n is silently ignored.
+ *        + Removed error messages while a disk drive is powered up at
+ *          boot time.
+ *        + Improved boot messages: all tagged capable device are
+ *          indicated as "tagged" or "soft-tagged" :
+ *          - "soft-tagged"  means that the driver is trying to do its
+ *            own tagging (i.e. the tc:y option is in effect);
+ *          - "tagged" means that the device supports tagged commands,
+ *            but the driver lets the HBA be responsible for tagging
+ *            support.
+ *
+ *      16 Sep 1999 Rev. 5.11 for linux 2.2.12 and 2.3.18
+ *        + Updated to the new __setup interface for boot command line options.
+ *        + When loaded as a module, accepts the new parameter boot_options
+ *          which value is a string with the same format of the kernel boot
+ *          command line options. A valid example is:
+ *          modprobe eata 'boot_options="0x7410,0x230,lc:y,tc:n,mq:4"'
+ *
+ *       9 Sep 1999 Rev. 5.10 for linux 2.2.12 and 2.3.17
+ *        + 64bit cleanup for Linux/Alpha platform support
+ *          (contribution from H.J. Lu).
+ *
+ *      22 Jul 1999 Rev. 5.00 for linux 2.2.10 and 2.3.11
+ *        + Removed pre-2.2 source code compatibility.
+ *        + Added call to pci_set_master.
+ *
+ *      26 Jul 1998 Rev. 4.33 for linux 2.0.35 and 2.1.111
+ *        + Added command line option (rs:[y|n]) to reverse the scan order
+ *          of PCI boards. The default is rs:y, which reverses the BIOS order
+ *          while registering PCI boards. The default value rs:y generates
+ *          the same order of all previous revisions of this driver.
+ *          Pls. note that "BIOS order" might have been reversed itself
+ *          after the 2.1.9x PCI modifications in the linux kernel.
+ *          The rs value is ignored when the explicit list of addresses
+ *          is used by the "eata=port0,port1,..." command line option.
+ *        + Added command line option (et:[y|n]) to force use of extended
+ *          translation (255 heads, 63 sectors) as disk geometry.
+ *          The default is et:n, which uses the disk geometry returned
+ *          by scsicam_bios_param. The default value et:n is compatible with
+ *          all previous revisions of this driver.
+ *
+ *      28 May 1998 Rev. 4.32 for linux 2.0.33 and 2.1.104
+ *          Increased busy timeout from 10 msec. to 200 msec. while
+ *          processing interrupts.
+ *
+ *      16 May 1998 Rev. 4.31 for linux 2.0.33 and 2.1.102
+ *          Improved abort handling during the eh recovery process.
+ *
+ *      13 May 1998 Rev. 4.30 for linux 2.0.33 and 2.1.101
+ *          The driver is now fully SMP safe, including the
+ *          abort and reset routines.
+ *          Added command line options (eh:[y|n]) to choose between
+ *          new_eh_code and the old scsi code.
+ *          If linux version >= 2.1.101 the default is eh:y, while the eh
+ *          option is ignored for previous releases and the old scsi code
+ *          is used.
+ *
+ *      18 Apr 1998 Rev. 4.20 for linux 2.0.33 and 2.1.97
+ *          Reworked interrupt handler.
+ *
+ *      11 Apr 1998 rev. 4.05 for linux 2.0.33 and 2.1.95
+ *          Major reliability improvement: when a batch with overlapping
+ *          requests is detected, requests are queued one at a time
+ *          eliminating any possible board or drive reordering.
+ *
+ *      10 Apr 1998 rev. 4.04 for linux 2.0.33 and 2.1.95
+ *          Improved SMP support (if linux version >= 2.1.95).
+ *
+ *       9 Apr 1998 rev. 4.03 for linux 2.0.33 and 2.1.94
+ *          Added support for new PCI code and IO-APIC remapping of irqs.
+ *          Performance improvement: when sequential i/o is detected,
+ *          always use direct sort instead of reverse sort.
+ *
+ *       4 Apr 1998 rev. 4.02 for linux 2.0.33 and 2.1.92
+ *          io_port is now unsigned long.
+ *
+ *      17 Mar 1998 rev. 4.01 for linux 2.0.33 and 2.1.88
+ *          Use new scsi error handling code (if linux version >= 2.1.88).
+ *          Use new interrupt code.
+ *
+ *      12 Sep 1997 rev. 3.11 for linux 2.0.30 and 2.1.55
+ *          Use of udelay inside the wait loops to avoid timeout
+ *          problems with fast cpus.
+ *          Removed check about useless calls to the interrupt service
+ *          routine (reported on SMP systems only).
+ *          At initialization time "sorted/unsorted" is displayed instead
+ *          of "linked/unlinked" to reinforce the fact that "linking" is
+ *          nothing but "elevator sorting" in the actual implementation.
+ *
+ *      17 May 1997 rev. 3.10 for linux 2.0.30 and 2.1.38
+ *          Use of serial_number_at_timeout in abort and reset processing.
+ *          Use of the __initfunc and __initdata macro in setup code.
+ *          Minor cleanups in the list_statistics code.
+ *          Increased controller busy timeout in order to better support
+ *          slow SCSI devices.
+ *
+ *      24 Feb 1997 rev. 3.00 for linux 2.0.29 and 2.1.26
+ *          When loading as a module, parameter passing is now supported
+ *          both in 2.0 and in 2.1 style.
+ *          Fixed data transfer direction for some SCSI opcodes.
+ *          Immediate acknowledge to request sense commands.
+ *          Linked commands to each disk device are now reordered by elevator
+ *          sorting. Rare cases in which reordering of write requests could
+ *          cause wrong results are managed.
+ *          Fixed spurious timeouts caused by long simple queue tag sequences.
+ *          New command line option (tm:[0-3]) to choose the type of tags:
+ *          0 -> mixed (default); 1 -> simple; 2 -> head; 3 -> ordered.
+ *
+ *      18 Jan 1997 rev. 2.60 for linux 2.1.21 and 2.0.28
+ *          Added command line options to enable/disable linked commands
+ *          (lc:[y|n]), tagged commands (tc:[y|n]) and to set the max queue
+ *          depth (mq:xx). Default is "eata=lc:n,tc:n,mq:16".
+ *          Improved command linking.
+ *          Documented how to setup RAID-0 with DPT SmartRAID boards.
+ *
+ *       8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27
+ *          Added linked command support.
+ *          Improved detection of PCI boards using ISA base addresses.
+ *
+ *       3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27
+ *          Added support for tagged commands and queue depth adjustment.
+ *
+ *      22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26
+ *          When CONFIG_PCI is defined, BIOS32 is used to include in the
+ *          list of i/o ports to be probed all the PCI SCSI controllers.
+ *          The list of i/o ports to be probed can be overwritten by the
+ *          "eata=port0,port1,...." boot command line option.
+ *          Scatter/gather lists are now allocated by a number of kmalloc
+ *          calls, in order to avoid the previous size limit of 64Kb.
+ *
+ *      16 Nov 1996 rev. 2.20 for linux 2.1.10 and 2.0.25
+ *          Added support for EATA 2.0C, PCI, multichannel and wide SCSI.
+ *
+ *      27 Sep 1996 rev. 2.12 for linux 2.1.0
+ *          Portability cleanups (virtual/bus addressing, little/big endian
+ *          support).
+ *
+ *      09 Jul 1996 rev. 2.11 for linux 2.0.4
+ *          Number of internal retries is now limited.
+ *
+ *      16 Apr 1996 rev. 2.10 for linux 1.3.90
+ *          New argument "reset_flags" to the reset routine.
+ *
+ *       6 Jul 1995 rev. 2.01 for linux 1.3.7
+ *          Update required by the new /proc/scsi support.
+ *
+ *      11 Mar 1995 rev. 2.00 for linux 1.2.0
+ *          Fixed a bug which prevented media change detection for removable
+ *          disk drives.
+ *
+ *      23 Feb 1995 rev. 1.18 for linux 1.1.94
+ *          Added a check for scsi_register returning NULL.
+ *
+ *      11 Feb 1995 rev. 1.17 for linux 1.1.91
+ *          Now DEBUG_RESET is disabled by default.
+ *          Register a board even if it does not assert DMA protocol support
+ *          (DPT SK2011B does not report correctly the dmasup bit).
+ *
+ *       9 Feb 1995 rev. 1.16 for linux 1.1.90
+ *          Use host->wish_block instead of host->block.
+ *          New list of Data Out SCSI commands.
+ *
+ *       8 Feb 1995 rev. 1.15 for linux 1.1.89
+ *          Cleared target_time_out counter while performing a reset.
+ *          All external symbols renamed to avoid possible name conflicts.
+ *
+ *      28 Jan 1995 rev. 1.14 for linux 1.1.86
+ *          Added module support.
+ *          Log and do a retry when a disk drive returns a target status
+ *          different from zero on a recovered error.
+ *
+ *      24 Jan 1995 rev. 1.13 for linux 1.1.85
+ *          Use optimized board configuration, with a measured performance
+ *          increase in the range 10%-20% on i/o throughput.
+ *
+ *      16 Jan 1995 rev. 1.12 for linux 1.1.81
+ *          Fix mscp structure comments (no functional change).
+ *          Display a message if check_region detects a port address
+ *          already in use.
+ *
+ *      17 Dec 1994 rev. 1.11 for linux 1.1.74
+ *          Use the scsicam_bios_param routine. This allows an easy
+ *          migration path from disk partition tables created using
+ *          different SCSI drivers and non optimal disk geometry.
+ *
+ *      15 Dec 1994 rev. 1.10 for linux 1.1.74
+ *          Added support for ISA EATA boards (DPT PM2011, DPT PM2021).
+ *          The host->block flag is set for all the detected ISA boards.
+ *          The detect routine no longer enforces LEVEL triggering
+ *          for EISA boards, it just prints a warning message.
+ *
+ *      30 Nov 1994 rev. 1.09 for linux 1.1.68
+ *          Redo i/o on target status CHECK_CONDITION for TYPE_DISK only.
+ *          Added optional support for using a single board at a time.
+ *
+ *      18 Nov 1994 rev. 1.08 for linux 1.1.64
+ *          Forces sg_tablesize = 64 and can_queue = 64 if these
+ *          values are not correctly detected (DPT PM2012).
+ *
+ *      14 Nov 1994 rev. 1.07 for linux 1.1.63  Final BETA release.
+ *      04 Aug 1994 rev. 1.00 for linux 1.1.39  First BETA release.
+ *
+ *
+ *          This driver is based on the CAM (Common Access Method Committee)
+ *          EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol.
+ *
+ *  Copyright (C) 1994-2003 Dario Ballabio (ballabio_dario@emc.com)
+ *
+ *  Alternate email: dario.ballabio@inwind.it, dario.ballabio@tiscalinet.it
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that redistributions of source
+ *  code retain the above copyright notice and this comment without
+ *  modification.
+ *
+ */
+
+/*
+ *
+ *  Here is a brief description of the DPT SCSI host adapters.
+ *  All these boards provide an EATA/DMA compatible programming interface
+ *  and are fully supported by this driver in any configuration, including
+ *  multiple SCSI channels:
+ *
+ *  PM2011B/9X -  Entry Level ISA
+ *  PM2021A/9X -  High Performance ISA
+ *  PM2012A       Old EISA
+ *  PM2012B       Old EISA
+ *  PM2022A/9X -  Entry Level EISA
+ *  PM2122A/9X -  High Performance EISA
+ *  PM2322A/9X -  Extra High Performance EISA
+ *  PM3021     -  SmartRAID Adapter for ISA
+ *  PM3222     -  SmartRAID Adapter for EISA (PM3222W is 16-bit wide SCSI)
+ *  PM3224     -  SmartRAID Adapter for PCI  (PM3224W is 16-bit wide SCSI)
+ *  PM33340UW  -  SmartRAID Adapter for PCI  ultra wide multichannel
+ *
+ *  The above list is just an indication: as a matter of fact all DPT
+ *  boards using the EATA/DMA protocol are supported by this driver,
+ *  since they use exactely the same programming interface.
+ *
+ *  The DPT PM2001 provides only the EATA/PIO interface and hence is not
+ *  supported by this driver.
+ *
+ *  This code has been tested with up to 3 Distributed Processing Technology
+ *  PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) EISA controllers,
+ *  in any combination of private and shared IRQ.
+ *  PCI support has been tested using up to 2 DPT PM3224W (DPT SCSI BIOS
+ *  v003.D0, firmware v07G.0).
+ *
+ *  DPT SmartRAID boards support "Hardware Array" - a group of disk drives
+ *  which are all members of the same RAID-0, RAID-1 or RAID-5 array implemented
+ *  in host adapter hardware. Hardware Arrays are fully compatible with this
+ *  driver, since they look to it as a single disk drive.
+ *
+ *  WARNING: to create a RAID-0 "Hardware Array" you must select "Other Unix"
+ *  as the current OS in the DPTMGR "Initial System Installation" menu.
+ *  Otherwise RAID-0 is generated as an "Array Group" (i.e. software RAID-0),
+ *  which is not supported by the actual SCSI subsystem.
+ *  To get the "Array Group" functionality, the Linux MD driver must be used
+ *  instead of the DPT "Array Group" feature.
+ *
+ *  Multiple ISA, EISA and PCI boards can be configured in the same system.
+ *  It is suggested to put all the EISA boards on the same IRQ level, all
+ *  the PCI  boards on another IRQ level, while ISA boards cannot share
+ *  interrupts.
+ *
+ *  If you configure multiple boards on the same IRQ, the interrupt must
+ *  be _level_ triggered (not _edge_ triggered).
+ *
+ *  This driver detects EATA boards by probes at fixed port addresses,
+ *  so no BIOS32 or PCI BIOS support is required.
+ *  The suggested way to detect a generic EATA PCI board is to force on it
+ *  any unused EISA address, even if there are other controllers on the EISA
+ *  bus, or even if you system has no EISA bus at all.
+ *  Do not force any ISA address on EATA PCI boards.
+ *
+ *  If PCI bios support is configured into the kernel, BIOS32 is used to
+ *  include in the list of i/o ports to be probed all the PCI SCSI controllers.
+ *
+ *  Due to a DPT BIOS "feature", it might not be possible to force an EISA
+ *  address on more than a single DPT PCI board, so in this case you have to
+ *  let the PCI BIOS assign the addresses.
+ *
+ *  The sequence of detection probes is:
+ *
+ *  - ISA 0x1F0;
+ *  - PCI SCSI controllers (only if BIOS32 is available);
+ *  - EISA/PCI 0x1C88 through 0xFC88 (corresponding to EISA slots 1 to 15);
+ *  - ISA  0x170, 0x230, 0x330.
+ *
+ *  The above list of detection probes can be totally replaced by the
+ *  boot command line option: "eata=port0,port1,port2,...", where the
+ *  port0, port1... arguments are ISA/EISA/PCI addresses to be probed.
+ *  For example using "eata=0x7410,0x7450,0x230", the driver probes
+ *  only the two PCI addresses 0x7410 and 0x7450 and the ISA address 0x230,
+ *  in this order; "eata=0" totally disables this driver.
+ *
+ *  After the optional list of detection probes, other possible command line
+ *  options are:
+ *
+ *  et:y  force use of extended translation (255 heads, 63 sectors);
+ *  et:n  use disk geometry detected by scsicam_bios_param;
+ *  rs:y  reverse scan order while detecting PCI boards;
+ *  rs:n  use BIOS order while detecting PCI boards;
+ *  lc:y  enables linked commands;
+ *  lc:n  disables linked commands;
+ *  tm:0  disables tagged commands (same as tc:n);
+ *  tm:1  use simple queue tags (same as tc:y);
+ *  tm:2  use ordered queue tags (same as tc:2);
+ *  mq:xx set the max queue depth to the value xx (2 <= xx <= 32).
+ *
+ *  The default value is: "eata=lc:n,mq:16,tm:0,et:n,rs:n".
+ *  An example using the list of detection probes could be:
+ *  "eata=0x7410,0x230,lc:y,tm:2,mq:4,et:n".
+ *
+ *  When loading as a module, parameters can be specified as well.
+ *  The above example would be (use 1 in place of y and 0 in place of n):
+ *
+ *  modprobe eata io_port=0x7410,0x230 linked_comm=1 \
+ *                max_queue_depth=4 ext_tran=0 tag_mode=2 \
+ *                rev_scan=1
+ *
+ *  ----------------------------------------------------------------------------
+ *  In this implementation, linked commands are designed to work with any DISK
+ *  or CD-ROM, since this linking has only the intent of clustering (time-wise)
+ *  and reordering by elevator sorting commands directed to each device,
+ *  without any relation with the actual SCSI protocol between the controller
+ *  and the device.
+ *  If Q is the queue depth reported at boot time for each device (also named
+ *  cmds/lun) and Q > 2, whenever there is already an active command to the
+ *  device all other commands to the same device  (up to Q-1) are kept waiting
+ *  in the elevator sorting queue. When the active command completes, the
+ *  commands in this queue are sorted by sector address. The sort is chosen
+ *  between increasing or decreasing by minimizing the seek distance between
+ *  the sector of the commands just completed and the sector of the first
+ *  command in the list to be sorted.
+ *  Trivial math assures that the unsorted average seek distance when doing
+ *  random seeks over S sectors is S/3.
+ *  When (Q-1) requests are uniformly distributed over S sectors, the average
+ *  distance between two adjacent requests is S/((Q-1) + 1), so the sorted
+ *  average seek distance for (Q-1) random requests over S sectors is S/Q.
+ *  The elevator sorting hence divides the seek distance by a factor Q/3.
+ *  The above pure geometric remarks are valid in all cases and the
+ *  driver effectively reduces the seek distance by the predicted factor
+ *  when there are Q concurrent read i/o operations on the device, but this
+ *  does not necessarily results in a noticeable performance improvement:
+ *  your mileage may vary....
+ *
+ *  Note: command reordering inside a batch of queued commands could cause
+ *        wrong results only if there is at least one write request and the
+ *        intersection (sector-wise) of all requests is not empty.
+ *        When the driver detects a batch including overlapping requests
+ *        (a really rare event) strict serial (pid) order is enforced.
+ *  ----------------------------------------------------------------------------
+ *  The extended translation option (et:y) is useful when using large physical
+ *  disks/arrays. It could also be useful when switching between Adaptec boards
+ *  and DPT boards without reformatting the disk.
+ *  When a boot disk is partitioned with extended translation, in order to
+ *  be able to boot it with a DPT board is could be necessary to add to
+ *  lilo.conf additional commands as in the following example:
+ *
+ *  fix-table
+ *  disk=/dev/sda bios=0x80 sectors=63 heads=128 cylindres=546
+ *
+ *  where the above geometry should be replaced with the one reported at
+ *  power up by the DPT controller.
+ *  ----------------------------------------------------------------------------
+ *
+ *  The boards are named EATA0, EATA1,... according to the detection order.
+ *
+ *  In order to support multiple ISA boards in a reliable way,
+ *  the driver sets host->wish_block = 1 for all ISA boards.
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/proc_fs.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/stat.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ctype.h>
+#include <linux/spinlock.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+
+static int eata2x_detect(struct scsi_host_template *);
+static int eata2x_release(struct Scsi_Host *);
+static int eata2x_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
+static int eata2x_eh_abort(struct scsi_cmnd *);
+static int eata2x_eh_host_reset(struct scsi_cmnd *);
+static int eata2x_bios_param(struct scsi_device *, struct block_device *,
+			     sector_t, int *);
+static int eata2x_slave_configure(struct scsi_device *);
+
+static struct scsi_host_template driver_template = {
+	.name = "EATA/DMA 2.0x rev. 8.10.00 ",
+	.detect = eata2x_detect,
+	.release = eata2x_release,
+	.queuecommand = eata2x_queuecommand,
+	.eh_abort_handler = eata2x_eh_abort,
+	.eh_host_reset_handler = eata2x_eh_host_reset,
+	.bios_param = eata2x_bios_param,
+	.slave_configure = eata2x_slave_configure,
+	.this_id = 7,
+	.unchecked_isa_dma = 1,
+	.use_clustering = ENABLE_CLUSTERING,
+};
+
+#if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)
+#error "Adjust your <asm/byteorder.h> defines"
+#endif
+
+/* Subversion values */
+#define ISA  0
+#define ESA 1
+
+#undef  FORCE_CONFIG
+
+#undef  DEBUG_LINKED_COMMANDS
+#undef  DEBUG_DETECT
+#undef  DEBUG_PCI_DETECT
+#undef  DEBUG_INTERRUPT
+#undef  DEBUG_RESET
+#undef  DEBUG_GENERATE_ERRORS
+#undef  DEBUG_GENERATE_ABORTS
+#undef  DEBUG_GEOMETRY
+
+#define MAX_ISA 4
+#define MAX_VESA 0
+#define MAX_EISA 15
+#define MAX_PCI 16
+#define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI)
+#define MAX_CHANNEL 4
+#define MAX_LUN 32
+#define MAX_TARGET 32
+#define MAX_MAILBOXES 64
+#define MAX_SGLIST 64
+#define MAX_LARGE_SGLIST 122
+#define MAX_INTERNAL_RETRIES 64
+#define MAX_CMD_PER_LUN 2
+#define MAX_TAGGED_CMD_PER_LUN (MAX_MAILBOXES - MAX_CMD_PER_LUN)
+
+#define SKIP ULONG_MAX
+#define FREE 0
+#define IN_USE   1
+#define LOCKED   2
+#define IN_RESET 3
+#define IGNORE   4
+#define READY    5
+#define ABORTING 6
+#define NO_DMA  0xff
+#define MAXLOOP  10000
+#define TAG_DISABLED 0
+#define TAG_SIMPLE   1
+#define TAG_ORDERED  2
+
+#define REG_CMD         7
+#define REG_STATUS      7
+#define REG_AUX_STATUS  8
+#define REG_DATA        0
+#define REG_DATA2       1
+#define REG_SEE         6
+#define REG_LOW         2
+#define REG_LM          3
+#define REG_MID         4
+#define REG_MSB         5
+#define REGION_SIZE     9UL
+#define MAX_ISA_ADDR    0x03ff
+#define MIN_EISA_ADDR   0x1c88
+#define MAX_EISA_ADDR   0xfc88
+#define BSY_ASSERTED      0x80
+#define DRQ_ASSERTED      0x08
+#define ABSY_ASSERTED     0x01
+#define IRQ_ASSERTED      0x02
+#define READ_CONFIG_PIO   0xf0
+#define SET_CONFIG_PIO    0xf1
+#define SEND_CP_PIO       0xf2
+#define RECEIVE_SP_PIO    0xf3
+#define TRUNCATE_XFR_PIO  0xf4
+#define RESET_PIO         0xf9
+#define READ_CONFIG_DMA   0xfd
+#define SET_CONFIG_DMA    0xfe
+#define SEND_CP_DMA       0xff
+#define ASOK              0x00
+#define ASST              0x01
+
+#define YESNO(a) ((a) ? 'y' : 'n')
+#define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM)
+
+/* "EATA", in Big Endian format */
+#define EATA_SIG_BE 0x45415441
+
+/* Number of valid bytes in the board config structure for EATA 2.0x */
+#define EATA_2_0A_SIZE 28
+#define EATA_2_0B_SIZE 30
+#define EATA_2_0C_SIZE 34
+
+/* Board info structure */
+struct eata_info {
+	u_int32_t data_len;	/* Number of valid bytes after this field */
+	u_int32_t sign;		/* ASCII "EATA" signature */
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+	unchar version	: 4,
+	       		: 4;
+	unchar haaval	: 1,
+	       ata	: 1,
+	       drqvld	: 1,
+	       dmasup	: 1,
+	       morsup	: 1,
+	       trnxfr	: 1,
+	       tarsup	: 1,
+	       ocsena	: 1;
+#else
+	unchar		: 4,	/* unused low nibble */
+	 	version	: 4;	/* EATA version, should be 0x1 */
+	unchar ocsena	: 1,	/* Overlap Command Support Enabled */
+	       tarsup	: 1,	/* Target Mode Supported */
+	       trnxfr	: 1,	/* Truncate Transfer Cmd NOT Necessary */
+	       morsup	: 1,	/* More Supported */
+	       dmasup	: 1,	/* DMA Supported */
+	       drqvld	: 1,	/* DRQ Index (DRQX) is valid */
+	       ata	: 1,	/* This is an ATA device */
+	       haaval	: 1;	/* Host Adapter Address Valid */
+#endif
+
+	ushort cp_pad_len;	/* Number of pad bytes after cp_len */
+	unchar host_addr[4];	/* Host Adapter SCSI ID for channels 3, 2, 1, 0 */
+	u_int32_t cp_len;	/* Number of valid bytes in cp */
+	u_int32_t sp_len;	/* Number of valid bytes in sp */
+	ushort queue_size;	/* Max number of cp that can be queued */
+	ushort unused;
+	ushort scatt_size;	/* Max number of entries in scatter/gather table */
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+	unchar drqx	: 2,
+	       second	: 1,
+	       irq_tr	: 1,
+	       irq	: 4;
+	unchar sync;
+	unchar		: 4,
+	       res1	: 1,
+	       large_sg	: 1,
+	       forcaddr	: 1,
+	       isaena	: 1;
+	unchar max_chan	: 3,
+	       max_id	: 5;
+	unchar max_lun;
+	unchar eisa	: 1,
+	       pci	: 1,
+	       idquest	: 1,
+	       m1	: 1,
+	       		: 4;
+#else
+	unchar irq	: 4,	/* Interrupt Request assigned to this controller */
+	       irq_tr	: 1,	/* 0 for edge triggered, 1 for level triggered */
+	       second	: 1,	/* 1 if this is a secondary (not primary) controller */
+	       drqx	: 2;	/* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */
+	unchar sync;		/* 1 if scsi target id 7...0 is running sync scsi */
+
+	/* Structure extension defined in EATA 2.0B */
+	unchar isaena	: 1,	/* ISA i/o addressing is disabled/enabled */
+	       forcaddr	: 1,	/* Port address has been forced */
+	       large_sg	: 1,	/* 1 if large SG lists are supported */
+	       res1	: 1,
+	       		: 4;
+	unchar max_id	: 5,	/* Max SCSI target ID number */
+	       max_chan	: 3;	/* Max SCSI channel number on this board */
+
+	/* Structure extension defined in EATA 2.0C */
+	unchar max_lun;		/* Max SCSI LUN number */
+	unchar
+			: 4,
+	       m1	: 1,	/* This is a PCI with an M1 chip installed */
+	       idquest	: 1,	/* RAIDNUM returned is questionable */
+	       pci	: 1,	/* This board is PCI */
+	       eisa	: 1;	/* This board is EISA */
+#endif
+
+	unchar raidnum;		/* Uniquely identifies this HBA in a system */
+	unchar notused;
+
+	ushort ipad[247];
+};
+
+/* Board config structure */
+struct eata_config {
+	ushort len;		/* Number of bytes following this field */
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+	unchar		: 4,
+	       tarena	: 1,
+	       mdpena	: 1,
+	       ocena	: 1,
+	       edis	: 1;
+#else
+	unchar edis	: 1,	/* Disable EATA interface after config command */
+	       ocena	: 1,	/* Overlapped Commands Enabled */
+	       mdpena	: 1,	/* Transfer all Modified Data Pointer Messages */
+	       tarena	: 1,	/* Target Mode Enabled for this controller */
+	       		: 4;
+#endif
+	unchar cpad[511];
+};
+
+/* Returned status packet structure */
+struct mssp {
+#if defined(__BIG_ENDIAN_BITFIELD)
+	unchar eoc	: 1,
+	       adapter_status : 7;
+#else
+	unchar adapter_status : 7,	/* State related to current command */
+	       eoc	: 1;		/* End Of Command (1 = command completed) */
+#endif
+	unchar target_status;	/* SCSI status received after data transfer */
+	unchar unused[2];
+	u_int32_t inv_res_len;	/* Number of bytes not transferred */
+	u_int32_t cpp_index;	/* Index of address set in cp */
+	char mess[12];
+};
+
+struct sg_list {
+	unsigned int address;	/* Segment Address */
+	unsigned int num_bytes;	/* Segment Length */
+};
+
+/* MailBox SCSI Command Packet */
+struct mscp {
+#if defined(__BIG_ENDIAN_BITFIELD)
+	unchar din	: 1,
+	       dout	: 1,
+	       interp	: 1,
+	       		: 1,
+		sg	: 1,
+		reqsen	:1,
+		init	: 1,
+		sreset	: 1;
+	unchar sense_len;
+	unchar unused[3];
+	unchar		: 7,
+	       fwnest	: 1;
+	unchar		: 5,
+	       hbaci	: 1,
+	       iat	: 1,
+	       phsunit	: 1;
+	unchar channel	: 3,
+	       target	: 5;
+	unchar one	: 1,
+	       dispri	: 1,
+	       luntar	: 1,
+	       lun	: 5;
+#else
+	unchar sreset	:1,	/* SCSI Bus Reset Signal should be asserted */
+	       init	:1,	/* Re-initialize controller and self test */
+	       reqsen	:1,	/* Transfer Request Sense Data to addr using DMA */
+	       sg	:1,	/* Use Scatter/Gather */
+	       		:1,
+	       interp	:1,	/* The controller interprets cp, not the target */
+	       dout	:1,	/* Direction of Transfer is Out (Host to Target) */
+	       din	:1;	/* Direction of Transfer is In (Target to Host) */
+	unchar sense_len;	/* Request Sense Length */
+	unchar unused[3];
+	unchar fwnest	: 1,	/* Send command to a component of an Array Group */
+			: 7;
+	unchar phsunit	: 1,	/* Send to Target Physical Unit (bypass RAID) */
+	       iat	: 1,	/* Inhibit Address Translation */
+	       hbaci	: 1,	/* Inhibit HBA Caching for this command */
+	       		: 5;
+	unchar target	: 5,	/* SCSI target ID */
+	       channel	: 3;	/* SCSI channel number */
+	unchar lun	: 5,	/* SCSI logical unit number */
+	       luntar	: 1,	/* This cp is for Target (not LUN) */
+	       dispri	: 1,	/* Disconnect Privilege granted */
+	       one	: 1;	/* 1 */
+#endif
+
+	unchar mess[3];		/* Massage to/from Target */
+	unchar cdb[12];		/* Command Descriptor Block */
+	u_int32_t data_len;	/* If sg=0 Data Length, if sg=1 sglist length */
+	u_int32_t cpp_index;	/* Index of address to be returned in sp */
+	u_int32_t data_address;	/* If sg=0 Data Address, if sg=1 sglist address */
+	u_int32_t sp_dma_addr;	/* Address where sp is DMA'ed when cp completes */
+	u_int32_t sense_addr;	/* Address where Sense Data is DMA'ed on error */
+
+	/* Additional fields begin here. */
+	struct scsi_cmnd *SCpnt;
+
+	/* All the cp structure is zero filled by queuecommand except the
+	   following CP_TAIL_SIZE bytes, initialized by detect */
+	dma_addr_t cp_dma_addr;	/* dma handle for this cp structure */
+	struct sg_list *sglist;	/* pointer to the allocated SG list */
+};
+
+#define CP_TAIL_SIZE (sizeof(struct sglist *) + sizeof(dma_addr_t))
+
+struct hostdata {
+	struct mscp cp[MAX_MAILBOXES];	/* Mailboxes for this board */
+	unsigned int cp_stat[MAX_MAILBOXES];	/* FREE, IN_USE, LOCKED, IN_RESET */
+	unsigned int last_cp_used;	/* Index of last mailbox used */
+	unsigned int iocount;	/* Total i/o done for this board */
+	int board_number;	/* Number of this board */
+	char board_name[16];	/* Name of this board */
+	int in_reset;		/* True if board is doing a reset */
+	int target_to[MAX_TARGET][MAX_CHANNEL];	/* N. of timeout errors on target */
+	int target_redo[MAX_TARGET][MAX_CHANNEL];	/* If 1 redo i/o on target */
+	unsigned int retries;	/* Number of internal retries */
+	unsigned long last_retried_pid;	/* Pid of last retried command */
+	unsigned char subversion;	/* Bus type, either ISA or EISA/PCI */
+	unsigned char protocol_rev;	/* EATA 2.0 rev., 'A' or 'B' or 'C' */
+	unsigned char is_pci;	/* 1 is bus type is PCI */
+	struct pci_dev *pdev;	/* pdev for PCI bus, NULL otherwise */
+	struct mssp *sp_cpu_addr;	/* cpu addr for DMA buffer sp */
+	dma_addr_t sp_dma_addr;	/* dma handle for DMA buffer sp */
+	struct mssp sp;		/* Local copy of sp buffer */
+};
+
+static struct Scsi_Host *sh[MAX_BOARDS];
+static const char *driver_name = "EATA";
+static char sha[MAX_BOARDS];
+
+/* Initialize num_boards so that ihdlr can work while detect is in progress */
+static unsigned int num_boards = MAX_BOARDS;
+
+static unsigned long io_port[] = {
+
+	/* Space for MAX_INT_PARAM ports usable while loading as a module */
+	SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
+	SKIP, SKIP,
+
+	/* First ISA */
+	0x1f0,
+
+	/* Space for MAX_PCI ports possibly reported by PCI_BIOS */
+	SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
+	SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
+
+	/* MAX_EISA ports */
+	0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
+	0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88,
+
+	/* Other (MAX_ISA - 1) ports */
+	0x170, 0x230, 0x330,
+
+	/* End of list */
+	0x0
+};
+
+/* Device is Big Endian */
+#define H2DEV(x)   cpu_to_be32(x)
+#define DEV2H(x)   be32_to_cpu(x)
+#define H2DEV16(x) cpu_to_be16(x)
+#define DEV2H16(x) be16_to_cpu(x)
+
+/* But transfer orientation from the 16 bit data register is Little Endian */
+#define REG2H(x)   le16_to_cpu(x)
+
+static irqreturn_t do_interrupt_handler(int, void *);
+static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *,
+		      unsigned int);
+static int do_trace = 0;
+static int setup_done = 0;
+static int link_statistics;
+static int ext_tran = 0;
+static int rev_scan = 1;
+
+#if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
+static int tag_mode = TAG_SIMPLE;
+#else
+static int tag_mode = TAG_DISABLED;
+#endif
+
+#if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
+static int linked_comm = 1;
+#else
+static int linked_comm = 0;
+#endif
+
+#if defined(CONFIG_SCSI_EATA_MAX_TAGS)
+static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
+#else
+static int max_queue_depth = MAX_CMD_PER_LUN;
+#endif
+
+#if defined(CONFIG_ISA)
+static int isa_probe = 1;
+#else
+static int isa_probe = 0;
+#endif
+
+#if defined(CONFIG_EISA)
+static int eisa_probe = 1;
+#else
+static int eisa_probe = 0;
+#endif
+
+#if defined(CONFIG_PCI)
+static int pci_probe = 1;
+#else
+static int pci_probe = 0;
+#endif
+
+#define MAX_INT_PARAM 10
+#define MAX_BOOT_OPTIONS_SIZE 256
+static char boot_options[MAX_BOOT_OPTIONS_SIZE];
+
+#if defined(MODULE)
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
+MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option."
+		 "            Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\"");
+MODULE_AUTHOR("Dario Ballabio");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("EATA/DMA SCSI Driver");
+
+#endif
+
+static int eata2x_slave_configure(struct scsi_device *dev)
+{
+	int tqd, utqd;
+	char *tag_suffix, *link_suffix;
+
+	utqd = MAX_CMD_PER_LUN;
+	tqd = max_queue_depth;
+
+	if (TLDEV(dev->type) && dev->tagged_supported) {
+		if (tag_mode == TAG_SIMPLE) {
+			tag_suffix = ", simple tags";
+		} else if (tag_mode == TAG_ORDERED) {
+			tag_suffix = ", ordered tags";
+		} else {
+			tag_suffix = ", no tags";
+		}
+		scsi_change_queue_depth(dev, tqd);
+	} else if (TLDEV(dev->type) && linked_comm) {
+		scsi_change_queue_depth(dev, tqd);
+		tag_suffix = ", untagged";
+	} else {
+		scsi_change_queue_depth(dev, utqd);
+		tag_suffix = "";
+	}
+
+	if (TLDEV(dev->type) && linked_comm && dev->queue_depth > 2)
+		link_suffix = ", sorted";
+	else if (TLDEV(dev->type))
+		link_suffix = ", unsorted";
+	else
+		link_suffix = "";
+
+	sdev_printk(KERN_INFO, dev,
+		"cmds/lun %d%s%s.\n",
+	       dev->queue_depth, link_suffix, tag_suffix);
+
+	return 0;
+}
+
+static int wait_on_busy(unsigned long iobase, unsigned int loop)
+{
+	while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
+		udelay(1L);
+		if (--loop == 0)
+			return 1;
+	}
+	return 0;
+}
+
+static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
+{
+	unsigned char *byaddr;
+	unsigned long devaddr;
+
+	if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
+		return 1;
+
+	if (addr) {
+		devaddr = H2DEV(addr);
+		byaddr = (unsigned char *)&devaddr;
+		outb(byaddr[3], iobase + REG_LOW);
+		outb(byaddr[2], iobase + REG_LM);
+		outb(byaddr[1], iobase + REG_MID);
+		outb(byaddr[0], iobase + REG_MSB);
+	}
+
+	outb(cmd, iobase + REG_CMD);
+	return 0;
+}
+
+static int read_pio(unsigned long iobase, ushort * start, ushort * end)
+{
+	unsigned int loop = MAXLOOP;
+	ushort *p;
+
+	for (p = start; p <= end; p++) {
+		while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) {
+			udelay(1L);
+			if (--loop == 0)
+				return 1;
+		}
+		loop = MAXLOOP;
+		*p = REG2H(inw(iobase));
+	}
+
+	return 0;
+}
+
+static struct pci_dev *get_pci_dev(unsigned long port_base)
+{
+#if defined(CONFIG_PCI)
+	unsigned int addr;
+	struct pci_dev *dev = NULL;
+
+	while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
+		addr = pci_resource_start(dev, 0);
+
+#if defined(DEBUG_PCI_DETECT)
+		printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n",
+		       driver_name, dev->bus->number, dev->devfn, addr);
+#endif
+
+		/* we are in so much trouble for a pci hotplug system with this driver
+		 * anyway, so doing this at least lets people unload the driver and not
+		 * cause memory problems, but in general this is a bad thing to do (this
+		 * driver needs to be converted to the proper PCI api someday... */
+		pci_dev_put(dev);
+		if (addr + PCI_BASE_ADDRESS_0 == port_base)
+			return dev;
+	}
+#endif				/* end CONFIG_PCI */
+	return NULL;
+}
+
+static void enable_pci_ports(void)
+{
+#if defined(CONFIG_PCI)
+	struct pci_dev *dev = NULL;
+
+	while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
+#if defined(DEBUG_PCI_DETECT)
+		printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n",
+		       driver_name, dev->bus->number, dev->devfn);
+#endif
+
+		if (pci_enable_device(dev))
+			printk
+			    ("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n",
+			     driver_name, dev->bus->number, dev->devfn);
+	}
+
+#endif				/* end CONFIG_PCI */
+}
+
+static int port_detect(unsigned long port_base, unsigned int j,
+		struct scsi_host_template *tpnt)
+{
+	unsigned char irq, dma_channel, subversion, i, is_pci = 0;
+	unsigned char protocol_rev;
+	struct eata_info info;
+	char *bus_type, dma_name[16];
+	struct pci_dev *pdev;
+	/* Allowed DMA channels for ISA (0 indicates reserved) */
+	unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
+	struct Scsi_Host *shost;
+	struct hostdata *ha;
+	char name[16];
+
+	sprintf(name, "%s%d", driver_name, j);
+
+	if (!request_region(port_base, REGION_SIZE, driver_name)) {
+#if defined(DEBUG_DETECT)
+		printk("%s: address 0x%03lx in use, skipping probe.\n", name,
+		       port_base);
+#endif
+		goto fail;
+	}
+
+	if (do_dma(port_base, 0, READ_CONFIG_PIO)) {
+#if defined(DEBUG_DETECT)
+		printk("%s: detect, do_dma failed at 0x%03lx.\n", name,
+		       port_base);
+#endif
+		goto freelock;
+	}
+
+	/* Read the info structure */
+	if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) {
+#if defined(DEBUG_DETECT)
+		printk("%s: detect, read_pio failed at 0x%03lx.\n", name,
+		       port_base);
+#endif
+		goto freelock;
+	}
+
+	info.data_len = DEV2H(info.data_len);
+	info.sign = DEV2H(info.sign);
+	info.cp_pad_len = DEV2H16(info.cp_pad_len);
+	info.cp_len = DEV2H(info.cp_len);
+	info.sp_len = DEV2H(info.sp_len);
+	info.scatt_size = DEV2H16(info.scatt_size);
+	info.queue_size = DEV2H16(info.queue_size);
+
+	/* Check the controller "EATA" signature */
+	if (info.sign != EATA_SIG_BE) {
+#if defined(DEBUG_DETECT)
+		printk("%s: signature 0x%04x discarded.\n", name, info.sign);
+#endif
+		goto freelock;
+	}
+
+	if (info.data_len < EATA_2_0A_SIZE) {
+		printk
+		    ("%s: config structure size (%d bytes) too short, detaching.\n",
+		     name, info.data_len);
+		goto freelock;
+	} else if (info.data_len == EATA_2_0A_SIZE)
+		protocol_rev = 'A';
+	else if (info.data_len == EATA_2_0B_SIZE)
+		protocol_rev = 'B';
+	else
+		protocol_rev = 'C';
+
+	if (protocol_rev != 'A' && info.forcaddr) {
+		printk("%s: warning, port address has been forced.\n", name);
+		bus_type = "PCI";
+		is_pci = 1;
+		subversion = ESA;
+	} else if (port_base > MAX_EISA_ADDR
+		   || (protocol_rev == 'C' && info.pci)) {
+		bus_type = "PCI";
+		is_pci = 1;
+		subversion = ESA;
+	} else if (port_base >= MIN_EISA_ADDR
+		   || (protocol_rev == 'C' && info.eisa)) {
+		bus_type = "EISA";
+		subversion = ESA;
+	} else if (protocol_rev == 'C' && !info.eisa && !info.pci) {
+		bus_type = "ISA";
+		subversion = ISA;
+	} else if (port_base > MAX_ISA_ADDR) {
+		bus_type = "PCI";
+		is_pci = 1;
+		subversion = ESA;
+	} else {
+		bus_type = "ISA";
+		subversion = ISA;
+	}
+
+	if (!info.haaval || info.ata) {
+		printk
+		    ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n",
+		     name, port_base, bus_type, info.haaval, info.ata);
+		goto freelock;
+	}
+
+	if (info.drqvld) {
+		if (subversion == ESA)
+			printk("%s: warning, weird %s board using DMA.\n", name,
+			       bus_type);
+
+		subversion = ISA;
+		dma_channel = dma_channel_table[3 - info.drqx];
+	} else {
+		if (subversion == ISA)
+			printk("%s: warning, weird %s board not using DMA.\n",
+			       name, bus_type);
+
+		subversion = ESA;
+		dma_channel = NO_DMA;
+	}
+
+	if (!info.dmasup)
+		printk("%s: warning, DMA protocol support not asserted.\n",
+		       name);
+
+	irq = info.irq;
+
+	if (subversion == ESA && !info.irq_tr)
+		printk
+		    ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
+		     name, irq);
+
+	if (is_pci) {
+		pdev = get_pci_dev(port_base);
+		if (!pdev)
+			printk
+			    ("%s: warning, failed to get pci_dev structure.\n",
+			     name);
+	} else
+		pdev = NULL;
+
+	if (pdev && (irq != pdev->irq)) {
+		printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq,
+		       pdev->irq);
+		irq = pdev->irq;
+	}
+
+	/* Board detected, allocate its IRQ */
+	if (request_irq(irq, do_interrupt_handler,
+			(subversion == ESA) ? IRQF_SHARED : 0,
+			driver_name, (void *)&sha[j])) {
+		printk("%s: unable to allocate IRQ %u, detaching.\n", name,
+		       irq);
+		goto freelock;
+	}
+
+	if (subversion == ISA && request_dma(dma_channel, driver_name)) {
+		printk("%s: unable to allocate DMA channel %u, detaching.\n",
+		       name, dma_channel);
+		goto freeirq;
+	}
+#if defined(FORCE_CONFIG)
+	{
+		struct eata_config *cf;
+		dma_addr_t cf_dma_addr;
+
+		cf = pci_zalloc_consistent(pdev, sizeof(struct eata_config),
+					   &cf_dma_addr);
+
+		if (!cf) {
+			printk
+			    ("%s: config, pci_alloc_consistent failed, detaching.\n",
+			     name);
+			goto freedma;
+		}
+
+		/* Set board configuration */
+		cf->len = (ushort) H2DEV16((ushort) 510);
+		cf->ocena = 1;
+
+		if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) {
+			printk
+			    ("%s: busy timeout sending configuration, detaching.\n",
+			     name);
+			pci_free_consistent(pdev, sizeof(struct eata_config),
+					    cf, cf_dma_addr);
+			goto freedma;
+		}
+
+	}
+#endif
+
+	sh[j] = shost = scsi_register(tpnt, sizeof(struct hostdata));
+	if (shost == NULL) {
+		printk("%s: unable to register host, detaching.\n", name);
+		goto freedma;
+	}
+
+	shost->io_port = port_base;
+	shost->unique_id = port_base;
+	shost->n_io_port = REGION_SIZE;
+	shost->dma_channel = dma_channel;
+	shost->irq = irq;
+	shost->sg_tablesize = (ushort) info.scatt_size;
+	shost->this_id = (ushort) info.host_addr[3];
+	shost->can_queue = (ushort) info.queue_size;
+	shost->cmd_per_lun = MAX_CMD_PER_LUN;
+
+	ha = (struct hostdata *)shost->hostdata;
+	
+	memset(ha, 0, sizeof(struct hostdata));
+	ha->subversion = subversion;
+	ha->protocol_rev = protocol_rev;
+	ha->is_pci = is_pci;
+	ha->pdev = pdev;
+	ha->board_number = j;
+
+	if (ha->subversion == ESA)
+		shost->unchecked_isa_dma = 0;
+	else {
+		unsigned long flags;
+		shost->unchecked_isa_dma = 1;
+
+		flags = claim_dma_lock();
+		disable_dma(dma_channel);
+		clear_dma_ff(dma_channel);
+		set_dma_mode(dma_channel, DMA_MODE_CASCADE);
+		enable_dma(dma_channel);
+		release_dma_lock(flags);
+
+	}
+
+	strcpy(ha->board_name, name);
+
+	/* DPT PM2012 does not allow to detect sg_tablesize correctly */
+	if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) {
+		printk("%s: detect, wrong n. of SG lists %d, fixed.\n",
+		       ha->board_name, shost->sg_tablesize);
+		shost->sg_tablesize = MAX_SGLIST;
+	}
+
+	/* DPT PM2012 does not allow to detect can_queue correctly */
+	if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) {
+		printk("%s: detect, wrong n. of mbox %d, fixed.\n",
+		       ha->board_name, shost->can_queue);
+		shost->can_queue = MAX_MAILBOXES;
+	}
+
+	if (protocol_rev != 'A') {
+		if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL)
+			shost->max_channel = info.max_chan;
+
+		if (info.max_id > 7 && info.max_id < MAX_TARGET)
+			shost->max_id = info.max_id + 1;
+
+		if (info.large_sg && shost->sg_tablesize == MAX_SGLIST)
+			shost->sg_tablesize = MAX_LARGE_SGLIST;
+	}
+
+	if (protocol_rev == 'C') {
+		if (info.max_lun > 7 && info.max_lun < MAX_LUN)
+			shost->max_lun = info.max_lun + 1;
+	}
+
+	if (dma_channel == NO_DMA)
+		sprintf(dma_name, "%s", "BMST");
+	else
+		sprintf(dma_name, "DMA %u", dma_channel);
+
+	for (i = 0; i < shost->can_queue; i++)
+		ha->cp[i].cp_dma_addr = pci_map_single(ha->pdev,
+							  &ha->cp[i],
+							  sizeof(struct mscp),
+							  PCI_DMA_BIDIRECTIONAL);
+
+	for (i = 0; i < shost->can_queue; i++) {
+		size_t sz = shost->sg_tablesize *sizeof(struct sg_list);
+		gfp_t gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC;
+		ha->cp[i].sglist = kmalloc(sz, gfp_mask);
+		if (!ha->cp[i].sglist) {
+			printk
+			    ("%s: kmalloc SGlist failed, mbox %d, detaching.\n",
+			     ha->board_name, i);
+			goto release;
+		}
+	}
+
+	if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev,
+							sizeof(struct mssp),
+							&ha->sp_dma_addr))) {
+		printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name);
+		goto release;
+	}
+
+	if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
+		max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
+
+	if (max_queue_depth < MAX_CMD_PER_LUN)
+		max_queue_depth = MAX_CMD_PER_LUN;
+
+	if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE)
+		tag_mode = TAG_ORDERED;
+
+	if (j == 0) {
+		printk
+		    ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n");
+		printk
+		    ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, "
+		     "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode,
+		     YESNO(linked_comm), max_queue_depth, YESNO(rev_scan),
+		     YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe),
+		     YESNO(pci_probe));
+	}
+
+	printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
+	       ha->board_name, ha->protocol_rev, bus_type,
+	       (unsigned long)shost->io_port, shost->irq, dma_name,
+	       shost->sg_tablesize, shost->can_queue);
+
+	if (shost->max_id > 8 || shost->max_lun > 8)
+		printk
+		    ("%s: wide SCSI support enabled, max_id %u, max_lun %llu.\n",
+		     ha->board_name, shost->max_id, shost->max_lun);
+
+	for (i = 0; i <= shost->max_channel; i++)
+		printk("%s: SCSI channel %u enabled, host target ID %d.\n",
+		       ha->board_name, i, info.host_addr[3 - i]);
+
+#if defined(DEBUG_DETECT)
+	printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, "
+	       "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version,
+	       info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync,
+	       info.second, info.data_len, info.cp_len, info.sp_len);
+
+	if (protocol_rev == 'B' || protocol_rev == 'C')
+		printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, "
+		       "large_sg %u, res1 %u.\n", name, info.isaena,
+		       info.forcaddr, info.max_id, info.max_chan, info.large_sg,
+		       info.res1);
+
+	if (protocol_rev == 'C')
+		printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, "
+		       "raidnum %u.\n", name, info.max_lun, info.m1,
+		       info.idquest, info.pci, info.eisa, info.raidnum);
+#endif
+
+	if (ha->pdev) {
+		pci_set_master(ha->pdev);
+		if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32)))
+			printk("%s: warning, pci_set_dma_mask failed.\n",
+			       ha->board_name);
+	}
+
+	return 1;
+
+      freedma:
+	if (subversion == ISA)
+		free_dma(dma_channel);
+      freeirq:
+	free_irq(irq, &sha[j]);
+      freelock:
+	release_region(port_base, REGION_SIZE);
+      fail:
+	return 0;
+
+      release:
+	eata2x_release(shost);
+	return 0;
+}
+
+static void internal_setup(char *str, int *ints)
+{
+	int i, argc = ints[0];
+	char *cur = str, *pc;
+
+	if (argc > 0) {
+		if (argc > MAX_INT_PARAM)
+			argc = MAX_INT_PARAM;
+
+		for (i = 0; i < argc; i++)
+			io_port[i] = ints[i + 1];
+
+		io_port[i] = 0;
+		setup_done = 1;
+	}
+
+	while (cur && (pc = strchr(cur, ':'))) {
+		int val = 0, c = *++pc;
+
+		if (c == 'n' || c == 'N')
+			val = 0;
+		else if (c == 'y' || c == 'Y')
+			val = 1;
+		else
+			val = (int)simple_strtoul(pc, NULL, 0);
+
+		if (!strncmp(cur, "lc:", 3))
+			linked_comm = val;
+		else if (!strncmp(cur, "tm:", 3))
+			tag_mode = val;
+		else if (!strncmp(cur, "tc:", 3))
+			tag_mode = val;
+		else if (!strncmp(cur, "mq:", 3))
+			max_queue_depth = val;
+		else if (!strncmp(cur, "ls:", 3))
+			link_statistics = val;
+		else if (!strncmp(cur, "et:", 3))
+			ext_tran = val;
+		else if (!strncmp(cur, "rs:", 3))
+			rev_scan = val;
+		else if (!strncmp(cur, "ip:", 3))
+			isa_probe = val;
+		else if (!strncmp(cur, "ep:", 3))
+			eisa_probe = val;
+		else if (!strncmp(cur, "pp:", 3))
+			pci_probe = val;
+
+		if ((cur = strchr(cur, ',')))
+			++cur;
+	}
+
+	return;
+}
+
+static int option_setup(char *str)
+{
+	int ints[MAX_INT_PARAM];
+	char *cur = str;
+	int i = 1;
+
+	while (cur && isdigit(*cur) && i < MAX_INT_PARAM) {
+		ints[i++] = simple_strtoul(cur, NULL, 0);
+
+		if ((cur = strchr(cur, ',')) != NULL)
+			cur++;
+	}
+
+	ints[0] = i - 1;
+	internal_setup(cur, ints);
+	return 1;
+}
+
+static void add_pci_ports(void)
+{
+#if defined(CONFIG_PCI)
+	unsigned int addr, k;
+	struct pci_dev *dev = NULL;
+
+	for (k = 0; k < MAX_PCI; k++) {
+
+		if (!(dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev)))
+			break;
+
+		if (pci_enable_device(dev)) {
+#if defined(DEBUG_PCI_DETECT)
+			printk
+			    ("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n",
+			     driver_name, dev->bus->number, dev->devfn);
+#endif
+
+			continue;
+		}
+
+		addr = pci_resource_start(dev, 0);
+
+#if defined(DEBUG_PCI_DETECT)
+		printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n",
+		       driver_name, k, dev->bus->number, dev->devfn, addr);
+#endif
+
+		/* Order addresses according to rev_scan value */
+		io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
+		    addr + PCI_BASE_ADDRESS_0;
+	}
+
+	pci_dev_put(dev);
+#endif				/* end CONFIG_PCI */
+}
+
+static int eata2x_detect(struct scsi_host_template *tpnt)
+{
+	unsigned int j = 0, k;
+
+	tpnt->proc_name = "eata2x";
+
+	if (strlen(boot_options))
+		option_setup(boot_options);
+
+#if defined(MODULE)
+	/* io_port could have been modified when loading as a module */
+	if (io_port[0] != SKIP) {
+		setup_done = 1;
+		io_port[MAX_INT_PARAM] = 0;
+	}
+#endif
+
+	for (k = MAX_INT_PARAM; io_port[k]; k++)
+		if (io_port[k] == SKIP)
+			continue;
+		else if (io_port[k] <= MAX_ISA_ADDR) {
+			if (!isa_probe)
+				io_port[k] = SKIP;
+		} else if (io_port[k] >= MIN_EISA_ADDR
+			   && io_port[k] <= MAX_EISA_ADDR) {
+			if (!eisa_probe)
+				io_port[k] = SKIP;
+		}
+
+	if (pci_probe) {
+		if (!setup_done)
+			add_pci_ports();
+		else
+			enable_pci_ports();
+	}
+
+	for (k = 0; io_port[k]; k++) {
+
+		if (io_port[k] == SKIP)
+			continue;
+
+		if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt))
+			j++;
+	}
+
+	num_boards = j;
+	return j;
+}
+
+static void map_dma(unsigned int i, struct hostdata *ha)
+{
+	unsigned int k, pci_dir;
+	int count;
+	struct scatterlist *sg;
+	struct mscp *cpp;
+	struct scsi_cmnd *SCpnt;
+
+	cpp = &ha->cp[i];
+	SCpnt = cpp->SCpnt;
+	pci_dir = SCpnt->sc_data_direction;
+
+	if (SCpnt->sense_buffer)
+		cpp->sense_addr =
+		    H2DEV(pci_map_single(ha->pdev, SCpnt->sense_buffer,
+			   SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE));
+
+	cpp->sense_len = SCSI_SENSE_BUFFERSIZE;
+
+	if (!scsi_sg_count(SCpnt)) {
+		cpp->data_len = 0;
+		return;
+	}
+
+	count = pci_map_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
+			   pci_dir);
+	BUG_ON(!count);
+
+	scsi_for_each_sg(SCpnt, sg, count, k) {
+		cpp->sglist[k].address = H2DEV(sg_dma_address(sg));
+		cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg));
+	}
+
+	cpp->sg = 1;
+	cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist,
+						 scsi_sg_count(SCpnt) *
+						 sizeof(struct sg_list),
+						 pci_dir));
+	cpp->data_len = H2DEV((scsi_sg_count(SCpnt) * sizeof(struct sg_list)));
+}
+
+static void unmap_dma(unsigned int i, struct hostdata *ha)
+{
+	unsigned int pci_dir;
+	struct mscp *cpp;
+	struct scsi_cmnd *SCpnt;
+
+	cpp = &ha->cp[i];
+	SCpnt = cpp->SCpnt;
+	pci_dir = SCpnt->sc_data_direction;
+
+	if (DEV2H(cpp->sense_addr))
+		pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr),
+				 DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
+
+	if (scsi_sg_count(SCpnt))
+		pci_unmap_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
+			     pci_dir);
+
+	if (!DEV2H(cpp->data_len))
+		pci_dir = PCI_DMA_BIDIRECTIONAL;
+
+	if (DEV2H(cpp->data_address))
+		pci_unmap_single(ha->pdev, DEV2H(cpp->data_address),
+				 DEV2H(cpp->data_len), pci_dir);
+}
+
+static void sync_dma(unsigned int i, struct hostdata *ha)
+{
+	unsigned int pci_dir;
+	struct mscp *cpp;
+	struct scsi_cmnd *SCpnt;
+
+	cpp = &ha->cp[i];
+	SCpnt = cpp->SCpnt;
+	pci_dir = SCpnt->sc_data_direction;
+
+	if (DEV2H(cpp->sense_addr))
+		pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr),
+					    DEV2H(cpp->sense_len),
+					    PCI_DMA_FROMDEVICE);
+
+	if (scsi_sg_count(SCpnt))
+		pci_dma_sync_sg_for_cpu(ha->pdev, scsi_sglist(SCpnt),
+					scsi_sg_count(SCpnt), pci_dir);
+
+	if (!DEV2H(cpp->data_len))
+		pci_dir = PCI_DMA_BIDIRECTIONAL;
+
+	if (DEV2H(cpp->data_address))
+		pci_dma_sync_single_for_cpu(ha->pdev,
+					    DEV2H(cpp->data_address),
+					    DEV2H(cpp->data_len), pci_dir);
+}
+
+static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha)
+{
+	unsigned int k;
+
+	static const unsigned char data_out_cmds[] = {
+		0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e,
+		0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40,
+		0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d
+	};
+
+	static const unsigned char data_none_cmds[] = {
+		0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e,
+		0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47,
+		0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00
+	};
+
+	struct mscp *cpp;
+	struct scsi_cmnd *SCpnt;
+
+	cpp = &ha->cp[i];
+	SCpnt = cpp->SCpnt;
+
+	if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
+		cpp->din = 1;
+		cpp->dout = 0;
+		return;
+	} else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
+		cpp->din = 0;
+		cpp->dout = 1;
+		return;
+	} else if (SCpnt->sc_data_direction == DMA_NONE) {
+		cpp->din = 0;
+		cpp->dout = 0;
+		return;
+	}
+
+	if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL)
+		panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n",
+				ha->board_name);
+
+	for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
+		if (SCpnt->cmnd[0] == data_out_cmds[k]) {
+			cpp->dout = 1;
+			break;
+		}
+
+	if ((cpp->din = !cpp->dout))
+		for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++)
+			if (SCpnt->cmnd[0] == data_none_cmds[k]) {
+				cpp->din = 0;
+				break;
+			}
+
+}
+
+static int eata2x_queuecommand_lck(struct scsi_cmnd *SCpnt,
+			       void (*done) (struct scsi_cmnd *))
+{
+	struct Scsi_Host *shost = SCpnt->device->host;
+	struct hostdata *ha = (struct hostdata *)shost->hostdata;
+	unsigned int i, k;
+	struct mscp *cpp;
+
+	if (SCpnt->host_scribble)
+		panic("%s: qcomm, SCpnt %p already active.\n",
+		      ha->board_name, SCpnt);
+
+	/* i is the mailbox number, look for the first free mailbox
+	   starting from last_cp_used */
+	i = ha->last_cp_used + 1;
+
+	for (k = 0; k < shost->can_queue; k++, i++) {
+		if (i >= shost->can_queue)
+			i = 0;
+		if (ha->cp_stat[i] == FREE) {
+			ha->last_cp_used = i;
+			break;
+		}
+	}
+
+	if (k == shost->can_queue) {
+		printk("%s: qcomm, no free mailbox.\n", ha->board_name);
+		return 1;
+	}
+
+	/* Set pointer to control packet structure */
+	cpp = &ha->cp[i];
+
+	memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
+
+	/* Set pointer to status packet structure, Big Endian format */
+	cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr);
+
+	SCpnt->scsi_done = done;
+	cpp->cpp_index = i;
+	SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index;
+
+	if (do_trace)
+		scmd_printk(KERN_INFO, SCpnt,
+			"qcomm, mbox %d.\n", i);
+
+	cpp->reqsen = 1;
+	cpp->dispri = 1;
+#if 0
+	if (SCpnt->device->type == TYPE_TAPE)
+		cpp->hbaci = 1;
+#endif
+	cpp->one = 1;
+	cpp->channel = SCpnt->device->channel;
+	cpp->target = SCpnt->device->id;
+	cpp->lun = SCpnt->device->lun;
+	cpp->SCpnt = SCpnt;
+	memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
+
+	/* Use data transfer direction SCpnt->sc_data_direction */
+	scsi_to_dev_dir(i, ha);
+
+	/* Map DMA buffers and SG list */
+	map_dma(i, ha);
+
+	if (linked_comm && SCpnt->device->queue_depth > 2
+	    && TLDEV(SCpnt->device->type)) {
+		ha->cp_stat[i] = READY;
+		flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 0);
+		return 0;
+	}
+
+	/* Send control packet to the board */
+	if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
+		unmap_dma(i, ha);
+		SCpnt->host_scribble = NULL;
+		scmd_printk(KERN_INFO, SCpnt, "qcomm, adapter busy.\n");
+		return 1;
+	}
+
+	ha->cp_stat[i] = IN_USE;
+	return 0;
+}
+
+static DEF_SCSI_QCMD(eata2x_queuecommand)
+
+static int eata2x_eh_abort(struct scsi_cmnd *SCarg)
+{
+	struct Scsi_Host *shost = SCarg->device->host;
+	struct hostdata *ha = (struct hostdata *)shost->hostdata;
+	unsigned int i;
+
+	if (SCarg->host_scribble == NULL) {
+		scmd_printk(KERN_INFO, SCarg, "abort, cmd inactive.\n");
+		return SUCCESS;
+	}
+
+	i = *(unsigned int *)SCarg->host_scribble;
+	scmd_printk(KERN_WARNING, SCarg, "abort, mbox %d.\n", i);
+
+	if (i >= shost->can_queue)
+		panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name);
+
+	if (wait_on_busy(shost->io_port, MAXLOOP)) {
+		printk("%s: abort, timeout error.\n", ha->board_name);
+		return FAILED;
+	}
+
+	if (ha->cp_stat[i] == FREE) {
+		printk("%s: abort, mbox %d is free.\n", ha->board_name, i);
+		return SUCCESS;
+	}
+
+	if (ha->cp_stat[i] == IN_USE) {
+		printk("%s: abort, mbox %d is in use.\n", ha->board_name, i);
+
+		if (SCarg != ha->cp[i].SCpnt)
+			panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
+			      ha->board_name, i, SCarg, ha->cp[i].SCpnt);
+
+		if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
+			printk("%s: abort, mbox %d, interrupt pending.\n",
+			       ha->board_name, i);
+
+		return FAILED;
+	}
+
+	if (ha->cp_stat[i] == IN_RESET) {
+		printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i);
+		return FAILED;
+	}
+
+	if (ha->cp_stat[i] == LOCKED) {
+		printk("%s: abort, mbox %d is locked.\n", ha->board_name, i);
+		return SUCCESS;
+	}
+
+	if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
+		unmap_dma(i, ha);
+		SCarg->result = DID_ABORT << 16;
+		SCarg->host_scribble = NULL;
+		ha->cp_stat[i] = FREE;
+		printk("%s, abort, mbox %d ready, DID_ABORT, done.\n",
+		       ha->board_name, i);
+		SCarg->scsi_done(SCarg);
+		return SUCCESS;
+	}
+
+	panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i);
+}
+
+static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg)
+{
+	unsigned int i, time, k, c, limit = 0;
+	int arg_done = 0;
+	struct scsi_cmnd *SCpnt;
+	struct Scsi_Host *shost = SCarg->device->host;
+	struct hostdata *ha = (struct hostdata *)shost->hostdata;
+
+	scmd_printk(KERN_INFO, SCarg, "reset, enter.\n");
+
+	spin_lock_irq(shost->host_lock);
+
+	if (SCarg->host_scribble == NULL)
+		printk("%s: reset, inactive.\n", ha->board_name);
+
+	if (ha->in_reset) {
+		printk("%s: reset, exit, already in reset.\n", ha->board_name);
+		spin_unlock_irq(shost->host_lock);
+		return FAILED;
+	}
+
+	if (wait_on_busy(shost->io_port, MAXLOOP)) {
+		printk("%s: reset, exit, timeout error.\n", ha->board_name);
+		spin_unlock_irq(shost->host_lock);
+		return FAILED;
+	}
+
+	ha->retries = 0;
+
+	for (c = 0; c <= shost->max_channel; c++)
+		for (k = 0; k < shost->max_id; k++) {
+			ha->target_redo[k][c] = 1;
+			ha->target_to[k][c] = 0;
+		}
+
+	for (i = 0; i < shost->can_queue; i++) {
+
+		if (ha->cp_stat[i] == FREE)
+			continue;
+
+		if (ha->cp_stat[i] == LOCKED) {
+			ha->cp_stat[i] = FREE;
+			printk("%s: reset, locked mbox %d forced free.\n",
+			       ha->board_name, i);
+			continue;
+		}
+
+		if (!(SCpnt = ha->cp[i].SCpnt))
+			panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
+
+		if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
+			ha->cp_stat[i] = ABORTING;
+			printk("%s: reset, mbox %d aborting.\n",
+			       ha->board_name, i);
+		}
+
+		else {
+			ha->cp_stat[i] = IN_RESET;
+			printk("%s: reset, mbox %d in reset.\n",
+			       ha->board_name, i);
+		}
+
+		if (SCpnt->host_scribble == NULL)
+			panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i);
+
+		if (*(unsigned int *)SCpnt->host_scribble != i)
+			panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i);
+
+		if (SCpnt->scsi_done == NULL)
+			panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n",
+			      ha->board_name, i);
+
+		if (SCpnt == SCarg)
+			arg_done = 1;
+	}
+
+	if (do_dma(shost->io_port, 0, RESET_PIO)) {
+		printk("%s: reset, cannot reset, timeout error.\n", ha->board_name);
+		spin_unlock_irq(shost->host_lock);
+		return FAILED;
+	}
+
+	printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name);
+
+#if defined(DEBUG_RESET)
+	do_trace = 1;
+#endif
+
+	ha->in_reset = 1;
+
+	spin_unlock_irq(shost->host_lock);
+
+	/* FIXME: use a sleep instead */
+	time = jiffies;
+	while ((jiffies - time) < (10 * HZ) && limit++ < 200000)
+		udelay(100L);
+
+	spin_lock_irq(shost->host_lock);
+
+	printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit);
+
+	for (i = 0; i < shost->can_queue; i++) {
+
+		if (ha->cp_stat[i] == IN_RESET) {
+			SCpnt = ha->cp[i].SCpnt;
+			unmap_dma(i, ha);
+			SCpnt->result = DID_RESET << 16;
+			SCpnt->host_scribble = NULL;
+
+			/* This mailbox is still waiting for its interrupt */
+			ha->cp_stat[i] = LOCKED;
+
+			printk
+			    ("%s, reset, mbox %d locked, DID_RESET, done.\n",
+			     ha->board_name, i);
+		}
+
+		else if (ha->cp_stat[i] == ABORTING) {
+			SCpnt = ha->cp[i].SCpnt;
+			unmap_dma(i, ha);
+			SCpnt->result = DID_RESET << 16;
+			SCpnt->host_scribble = NULL;
+
+			/* This mailbox was never queued to the adapter */
+			ha->cp_stat[i] = FREE;
+
+			printk
+			    ("%s, reset, mbox %d aborting, DID_RESET, done.\n",
+			     ha->board_name, i);
+		}
+
+		else
+			/* Any other mailbox has already been set free by interrupt */
+			continue;
+
+		SCpnt->scsi_done(SCpnt);
+	}
+
+	ha->in_reset = 0;
+	do_trace = 0;
+
+	if (arg_done)
+		printk("%s: reset, exit, done.\n", ha->board_name);
+	else
+		printk("%s: reset, exit.\n", ha->board_name);
+
+	spin_unlock_irq(shost->host_lock);
+	return SUCCESS;
+}
+
+int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev,
+		      sector_t capacity, int *dkinfo)
+{
+	unsigned int size = capacity;
+
+	if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) {
+		dkinfo[0] = 255;
+		dkinfo[1] = 63;
+		dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
+	}
+#if defined (DEBUG_GEOMETRY)
+	printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name,
+	       dkinfo[0], dkinfo[1], dkinfo[2]);
+#endif
+
+	return 0;
+}
+
+static void sort(unsigned long sk[], unsigned int da[], unsigned int n,
+		 unsigned int rev)
+{
+	unsigned int i, j, k, y;
+	unsigned long x;
+
+	for (i = 0; i < n - 1; i++) {
+		k = i;
+
+		for (j = k + 1; j < n; j++)
+			if (rev) {
+				if (sk[j] > sk[k])
+					k = j;
+			} else {
+				if (sk[j] < sk[k])
+					k = j;
+			}
+
+		if (k != i) {
+			x = sk[k];
+			sk[k] = sk[i];
+			sk[i] = x;
+			y = da[k];
+			da[k] = da[i];
+			da[i] = y;
+		}
+	}
+
+	return;
+}
+
+static int reorder(struct hostdata *ha, unsigned long cursec,
+		   unsigned int ihdlr, unsigned int il[], unsigned int n_ready)
+{
+	struct scsi_cmnd *SCpnt;
+	struct mscp *cpp;
+	unsigned int k, n;
+	unsigned int rev = 0, s = 1, r = 1;
+	unsigned int input_only = 1, overlap = 0;
+	unsigned long sl[n_ready], pl[n_ready], ll[n_ready];
+	unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0;
+	unsigned long ioseek = 0;
+
+	static unsigned int flushcount = 0, batchcount = 0, sortcount = 0;
+	static unsigned int readycount = 0, ovlcount = 0, inputcount = 0;
+	static unsigned int readysorted = 0, revcount = 0;
+	static unsigned long seeksorted = 0, seeknosort = 0;
+
+	if (link_statistics && !(++flushcount % link_statistics))
+		printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"
+		       " av %ldK as %ldK.\n", flushcount, batchcount,
+		       inputcount, ovlcount, readycount, readysorted, sortcount,
+		       revcount, seeknosort / (readycount + 1),
+		       seeksorted / (readycount + 1));
+
+	if (n_ready <= 1)
+		return 0;
+
+	for (n = 0; n < n_ready; n++) {
+		k = il[n];
+		cpp = &ha->cp[k];
+		SCpnt = cpp->SCpnt;
+
+		if (!cpp->din)
+			input_only = 0;
+
+		if (blk_rq_pos(SCpnt->request) < minsec)
+			minsec = blk_rq_pos(SCpnt->request);
+		if (blk_rq_pos(SCpnt->request) > maxsec)
+			maxsec = blk_rq_pos(SCpnt->request);
+
+		sl[n] = blk_rq_pos(SCpnt->request);
+		ioseek += blk_rq_sectors(SCpnt->request);
+
+		if (!n)
+			continue;
+
+		if (sl[n] < sl[n - 1])
+			s = 0;
+		if (sl[n] > sl[n - 1])
+			r = 0;
+
+		if (link_statistics) {
+			if (sl[n] > sl[n - 1])
+				seek += sl[n] - sl[n - 1];
+			else
+				seek += sl[n - 1] - sl[n];
+		}
+
+	}
+
+	if (link_statistics) {
+		if (cursec > sl[0])
+			seek += cursec - sl[0];
+		else
+			seek += sl[0] - cursec;
+	}
+
+	if (cursec > ((maxsec + minsec) / 2))
+		rev = 1;
+
+	if (ioseek > ((maxsec - minsec) / 2))
+		rev = 0;
+
+	if (!((rev && r) || (!rev && s)))
+		sort(sl, il, n_ready, rev);
+
+	if (!input_only)
+		for (n = 0; n < n_ready; n++) {
+			k = il[n];
+			cpp = &ha->cp[k];
+			SCpnt = cpp->SCpnt;
+			ll[n] = blk_rq_sectors(SCpnt->request);
+			pl[n] = SCpnt->serial_number;
+
+			if (!n)
+				continue;
+
+			if ((sl[n] == sl[n - 1])
+			    || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n]))
+			    || (rev && ((sl[n] + ll[n]) > sl[n - 1])))
+				overlap = 1;
+		}
+
+	if (overlap)
+		sort(pl, il, n_ready, 0);
+
+	if (link_statistics) {
+		if (cursec > sl[0])
+			iseek = cursec - sl[0];
+		else
+			iseek = sl[0] - cursec;
+		batchcount++;
+		readycount += n_ready;
+		seeknosort += seek / 1024;
+		if (input_only)
+			inputcount++;
+		if (overlap) {
+			ovlcount++;
+			seeksorted += iseek / 1024;
+		} else
+			seeksorted += (iseek + maxsec - minsec) / 1024;
+		if (rev && !r) {
+			revcount++;
+			readysorted += n_ready;
+		}
+		if (!rev && !s) {
+			sortcount++;
+			readysorted += n_ready;
+		}
+	}
+#if defined(DEBUG_LINKED_COMMANDS)
+	if (link_statistics && (overlap || !(flushcount % link_statistics)))
+		for (n = 0; n < n_ready; n++) {
+			k = il[n];
+			cpp = &ha->cp[k];
+			SCpnt = cpp->SCpnt;
+			scmd_printk(KERN_INFO, SCpnt,
+			    "%s mb %d fc %d nr %d sec %ld ns %u"
+			     " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
+			     (ihdlr ? "ihdlr" : "qcomm"),
+			     k, flushcount,
+			     n_ready, blk_rq_pos(SCpnt->request),
+			     blk_rq_sectors(SCpnt->request), cursec, YESNO(s),
+			     YESNO(r), YESNO(rev), YESNO(input_only),
+			     YESNO(overlap), cpp->din);
+		}
+#endif
+	return overlap;
+}
+
+static void flush_dev(struct scsi_device *dev, unsigned long cursec,
+		      struct hostdata *ha, unsigned int ihdlr)
+{
+	struct scsi_cmnd *SCpnt;
+	struct mscp *cpp;
+	unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
+
+	for (k = 0; k < dev->host->can_queue; k++) {
+
+		if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE)
+			continue;
+
+		cpp = &ha->cp[k];
+		SCpnt = cpp->SCpnt;
+
+		if (SCpnt->device != dev)
+			continue;
+
+		if (ha->cp_stat[k] == IN_USE)
+			return;
+
+		il[n_ready++] = k;
+	}
+
+	if (reorder(ha, cursec, ihdlr, il, n_ready))
+		n_ready = 1;
+
+	for (n = 0; n < n_ready; n++) {
+		k = il[n];
+		cpp = &ha->cp[k];
+		SCpnt = cpp->SCpnt;
+
+		if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
+			scmd_printk(KERN_INFO, SCpnt,
+			    "%s, mbox %d, adapter"
+			     " busy, will abort.\n",
+			     (ihdlr ? "ihdlr" : "qcomm"),
+			     k);
+			ha->cp_stat[k] = ABORTING;
+			continue;
+		}
+
+		ha->cp_stat[k] = IN_USE;
+	}
+}
+
+static irqreturn_t ihdlr(struct Scsi_Host *shost)
+{
+	struct scsi_cmnd *SCpnt;
+	unsigned int i, k, c, status, tstatus, reg;
+	struct mssp *spp;
+	struct mscp *cpp;
+	struct hostdata *ha = (struct hostdata *)shost->hostdata;
+	int irq = shost->irq;
+
+	/* Check if this board need to be serviced */
+	if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
+		goto none;
+
+	ha->iocount++;
+
+	if (do_trace)
+		printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq,
+		       ha->iocount);
+
+	/* Check if this board is still busy */
+	if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) {
+		reg = inb(shost->io_port + REG_STATUS);
+		printk
+		    ("%s: ihdlr, busy timeout error,  irq %d, reg 0x%x, count %d.\n",
+		     ha->board_name, irq, reg, ha->iocount);
+		goto none;
+	}
+
+	spp = &ha->sp;
+
+	/* Make a local copy just before clearing the interrupt indication */
+	memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp));
+
+	/* Clear the completion flag and cp pointer on the dynamic copy of sp */
+	memset(ha->sp_cpu_addr, 0, sizeof(struct mssp));
+
+	/* Read the status register to clear the interrupt indication */
+	reg = inb(shost->io_port + REG_STATUS);
+
+#if defined (DEBUG_INTERRUPT)
+	{
+		unsigned char *bytesp;
+		int cnt;
+		bytesp = (unsigned char *)spp;
+		if (ha->iocount < 200) {
+			printk("sp[] =");
+			for (cnt = 0; cnt < 15; cnt++)
+				printk(" 0x%x", bytesp[cnt]);
+			printk("\n");
+		}
+	}
+#endif
+
+	/* Reject any sp with supspect data */
+	if (spp->eoc == 0 && ha->iocount > 1)
+		printk
+		    ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n",
+		     ha->board_name, irq, reg, ha->iocount);
+	if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue)
+		printk
+		    ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n",
+		     ha->board_name, spp->cpp_index, irq, reg, ha->iocount);
+	if (spp->eoc == 0 || spp->cpp_index < 0
+	    || spp->cpp_index >= shost->can_queue)
+		goto handled;
+
+	/* Find the mailbox to be serviced on this board */
+	i = spp->cpp_index;
+
+	cpp = &(ha->cp[i]);
+
+#if defined(DEBUG_GENERATE_ABORTS)
+	if ((ha->iocount > 500) && ((ha->iocount % 500) < 3))
+		goto handled;
+#endif
+
+	if (ha->cp_stat[i] == IGNORE) {
+		ha->cp_stat[i] = FREE;
+		goto handled;
+	} else if (ha->cp_stat[i] == LOCKED) {
+		ha->cp_stat[i] = FREE;
+		printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i,
+		       ha->iocount);
+		goto handled;
+	} else if (ha->cp_stat[i] == FREE) {
+		printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i,
+		       ha->iocount);
+		goto handled;
+	} else if (ha->cp_stat[i] == IN_RESET)
+		printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i);
+	else if (ha->cp_stat[i] != IN_USE)
+		panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
+		      ha->board_name, i, ha->cp_stat[i]);
+
+	ha->cp_stat[i] = FREE;
+	SCpnt = cpp->SCpnt;
+
+	if (SCpnt == NULL)
+		panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
+
+	if (SCpnt->host_scribble == NULL)
+		panic("%s: ihdlr, mbox %d, SCpnt %p garbled.\n", ha->board_name,
+		      i, SCpnt);
+
+	if (*(unsigned int *)SCpnt->host_scribble != i)
+		panic("%s: ihdlr, mbox %d, index mismatch %d.\n",
+		      ha->board_name, i,
+		      *(unsigned int *)SCpnt->host_scribble);
+
+	sync_dma(i, ha);
+
+	if (linked_comm && SCpnt->device->queue_depth > 2
+	    && TLDEV(SCpnt->device->type))
+		flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 1);
+
+	tstatus = status_byte(spp->target_status);
+
+#if defined(DEBUG_GENERATE_ERRORS)
+	if ((ha->iocount > 500) && ((ha->iocount % 200) < 2))
+		spp->adapter_status = 0x01;
+#endif
+
+	switch (spp->adapter_status) {
+	case ASOK:		/* status OK */
+
+		/* Forces a reset if a disk drive keeps returning BUSY */
+		if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
+			status = DID_ERROR << 16;
+
+		/* If there was a bus reset, redo operation on each target */
+		else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK
+			 && ha->target_redo[SCpnt->device->id][SCpnt->
+								  device->
+								  channel])
+			status = DID_BUS_BUSY << 16;
+
+		/* Works around a flaw in scsi.c */
+		else if (tstatus == CHECK_CONDITION
+			 && SCpnt->device->type == TYPE_DISK
+			 && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
+			status = DID_BUS_BUSY << 16;
+
+		else
+			status = DID_OK << 16;
+
+		if (tstatus == GOOD)
+			ha->target_redo[SCpnt->device->id][SCpnt->device->
+							      channel] = 0;
+
+		if (spp->target_status && SCpnt->device->type == TYPE_DISK &&
+		    (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 &&
+		       (SCpnt->sense_buffer[2] & 0xf) == NOT_READY)))
+			printk("%s: ihdlr, target %d.%d:%d, "
+			       "target_status 0x%x, sense key 0x%x.\n",
+			       ha->board_name,
+			       SCpnt->device->channel, SCpnt->device->id,
+			       (u8)SCpnt->device->lun,
+			       spp->target_status, SCpnt->sense_buffer[2]);
+
+		ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0;
+
+		if (ha->last_retried_pid == SCpnt->serial_number)
+			ha->retries = 0;
+
+		break;
+	case ASST:		/* Selection Time Out */
+	case 0x02:		/* Command Time Out   */
+
+		if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1)
+			status = DID_ERROR << 16;
+		else {
+			status = DID_TIME_OUT << 16;
+			ha->target_to[SCpnt->device->id][SCpnt->device->
+							    channel]++;
+		}
+
+		break;
+
+		/* Perform a limited number of internal retries */
+	case 0x03:		/* SCSI Bus Reset Received */
+	case 0x04:		/* Initial Controller Power-up */
+
+		for (c = 0; c <= shost->max_channel; c++)
+			for (k = 0; k < shost->max_id; k++)
+				ha->target_redo[k][c] = 1;
+
+		if (SCpnt->device->type != TYPE_TAPE
+		    && ha->retries < MAX_INTERNAL_RETRIES) {
+
+#if defined(DID_SOFT_ERROR)
+			status = DID_SOFT_ERROR << 16;
+#else
+			status = DID_BUS_BUSY << 16;
+#endif
+
+			ha->retries++;
+			ha->last_retried_pid = SCpnt->serial_number;
+		} else
+			status = DID_ERROR << 16;
+
+		break;
+	case 0x05:		/* Unexpected Bus Phase */
+	case 0x06:		/* Unexpected Bus Free */
+	case 0x07:		/* Bus Parity Error */
+	case 0x08:		/* SCSI Hung */
+	case 0x09:		/* Unexpected Message Reject */
+	case 0x0a:		/* SCSI Bus Reset Stuck */
+	case 0x0b:		/* Auto Request-Sense Failed */
+	case 0x0c:		/* Controller Ram Parity Error */
+	default:
+		status = DID_ERROR << 16;
+		break;
+	}
+
+	SCpnt->result = status | spp->target_status;
+
+#if defined(DEBUG_INTERRUPT)
+	if (SCpnt->result || do_trace)
+#else
+	if ((spp->adapter_status != ASOK && ha->iocount > 1000) ||
+	    (spp->adapter_status != ASOK &&
+	     spp->adapter_status != ASST && ha->iocount <= 1000) ||
+	    do_trace || msg_byte(spp->target_status))
+#endif
+		scmd_printk(KERN_INFO, SCpnt, "ihdlr, mbox %2d, err 0x%x:%x,"
+		       " reg 0x%x, count %d.\n",
+		       i, spp->adapter_status, spp->target_status,
+		       reg, ha->iocount);
+
+	unmap_dma(i, ha);
+
+	/* Set the command state to inactive */
+	SCpnt->host_scribble = NULL;
+
+	SCpnt->scsi_done(SCpnt);
+
+	if (do_trace)
+		printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name,
+				irq, ha->iocount);
+
+      handled:
+	return IRQ_HANDLED;
+      none:
+	return IRQ_NONE;
+}
+
+static irqreturn_t do_interrupt_handler(int dummy, void *shap)
+{
+	struct Scsi_Host *shost;
+	unsigned int j;
+	unsigned long spin_flags;
+	irqreturn_t ret;
+
+	/* Check if the interrupt must be processed by this handler */
+	if ((j = (unsigned int)((char *)shap - sha)) >= num_boards)
+		return IRQ_NONE;
+	shost = sh[j];
+
+	spin_lock_irqsave(shost->host_lock, spin_flags);
+	ret = ihdlr(shost);
+	spin_unlock_irqrestore(shost->host_lock, spin_flags);
+	return ret;
+}
+
+static int eata2x_release(struct Scsi_Host *shost)
+{
+	struct hostdata *ha = (struct hostdata *)shost->hostdata;
+	unsigned int i;
+
+	for (i = 0; i < shost->can_queue; i++)
+		kfree((&ha->cp[i])->sglist);
+
+	for (i = 0; i < shost->can_queue; i++)
+		pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr,
+				 sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL);
+
+	if (ha->sp_cpu_addr)
+		pci_free_consistent(ha->pdev, sizeof(struct mssp),
+				    ha->sp_cpu_addr, ha->sp_dma_addr);
+
+	free_irq(shost->irq, &sha[ha->board_number]);
+
+	if (shost->dma_channel != NO_DMA)
+		free_dma(shost->dma_channel);
+
+	release_region(shost->io_port, shost->n_io_port);
+	scsi_unregister(shost);
+	return 0;
+}
+
+#include "scsi_module.c"
+
+#ifndef MODULE
+__setup("eata=", option_setup);
+#endif				/* end MODULE */