Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1987 insertions, 0 deletions

diff --git a/drivers/scsi/u14-34f.c b/drivers/scsi/u14-34f.c
new file mode 100644
index 00000000000..dca215411f6
--- /dev/null
+++ b/drivers/scsi/u14-34f.c
@@ -0,0 +1,1987 @@
+/*
+ *      u14-34f.c - Low-level driver for UltraStor 14F/34F SCSI host adapters.
+ *
+ *      03 Jun 2003 Rev. 8.10 for linux-2.5.70
+ *        + Update for new IRQ API.
+ *        + Use "goto" when appropriate.
+ *        + Drop u14-34f.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]
+ *             of:[y|n]       have_old_firmware=[1|0]
+ *
+ *          A valid example using the new parameter format is:
+ *          modprobe u14-34f "u14-34f=0x340,0x330,lc:y,tm:0,mq:4"
+ *
+ *          which is equivalent to the old format:
+ *          modprobe u14-34f io_port=0x340,0x330 linked_comm=1 tag_mode=0 \
+ *                        max_queue_depth=4
+ *
+ *          With actual module code, u14-34f and u14_34f are equivalent
+ *          as module parameter names.
+ *
+ *      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.
+ *
+ *      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
+ *        + Fixed endian-ness problem due to bitfields.
+ *
+ *      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.
+ *
+ *      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
+ *        + Fix data transfer direction for opcode SEND_CUE_SHEET (0x5d)
+ *
+ *      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
+ *        + 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".
+ *
+ *      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 u14-34f 'boot_options="0x230,0x340,lc:y,mq:4"'
+ *
+ *      22 Jul 1999 Rev. 5.00 for linux 2.2.10 and 2.3.11
+ *        + Removed pre-2.2 source code compatibility.
+ *
+ *      26 Jul 1998 Rev. 4.33 for linux 2.0.35 and 2.1.111
+ *          Added command line option (et:[y|n]) to use the existing
+ *          translation (returned by scsicam_bios_param) as disk geometry.
+ *          The default is et:n, which uses the disk geometry jumpered
+ *          on the board.
+ *          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.
+ *
+ *      18 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
+ *          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.
+ *
+ *      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.
+ *
+ *      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]), old firmware support (of:[y|n]) and to set the max
+ *          queue depth (mq:xx). Default is "u14-34f=lc:n,of:n,mq:8".
+ *          Improved command linking.
+ *
+ *       8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27
+ *          Added linked command support.
+ *
+ *       3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27
+ *          Added queue depth adjustment.
+ *
+ *      22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26
+ *          The list of i/o ports to be probed can be overwritten by the
+ *          "u14-34f=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 multichannel support.
+ *
+ *      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
+ *          "Data over/under-run" no longer implies a redo on all targets.
+ *          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.
+ *
+ *      21 Jul 1995 rev. 2.02 for linux 1.3.11
+ *          Fixed Data Transfer Direction for some SCSI commands.
+ *
+ *      13 Jun 1995 rev. 2.01 for linux 1.2.10
+ *          HAVE_OLD_UX4F_FIRMWARE should be defined for U34F boards when
+ *          the firmware prom is not the latest one (28008-006).
+ *
+ *      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
+ *          U14F qualified to run with 32 sglists.
+ *          Now DEBUG_RESET is disabled by default.
+ *
+ *       9 Feb 1995 rev. 1.16 for linux 1.1.90
+ *          Use host->wish_block instead of host->block.
+ *
+ *       8 Feb 1995 rev. 1.15 for linux 1.1.89
+ *          Cleared target_time_out counter while performing a reset.
+ *
+ *      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.
+ *          Auto detects if U14F boards have an old firmware revision.
+ *          Max number of scatter/gather lists set to 16 for all boards
+ *          (most installation run fine using 33 sglists, while other
+ *          has problems when using more than 16).
+ *
+ *      16 Jan 1995 rev. 1.13 for linux 1.1.81
+ *          Display a message if check_region detects a port address
+ *          already in use.
+ *
+ *      15 Dec 1994 rev. 1.12 for linux 1.1.74
+ *          The host->block flag is set for all the detected ISA boards.
+ *
+ *      30 Nov 1994 rev. 1.11 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.
+ *
+ *      14 Nov 1994 rev. 1.10 for linux 1.1.63
+ *
+ *      28 Oct 1994 rev. 1.09 for linux 1.1.58  Final BETA release.
+ *      16 Jul 1994 rev. 1.00 for linux 1.1.29  Initial ALPHA release.
+ *
+ *          This driver is a total replacement of the original UltraStor
+ *          scsi driver, but it supports ONLY the 14F and 34F boards.
+ *          It can be configured in the same kernel in which the original
+ *          ultrastor driver is configured to allow the original U24F
+ *          support.
+ *
+ *          Multiple U14F and/or U34F host adapters are supported.
+ *
+ *  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.
+ *
+ *      WARNING: if your 14/34F board has an old firmware revision (see below)
+ *               you must change "#undef" into "#define" in the following
+ *               statement.
+ */
+#undef HAVE_OLD_UX4F_FIRMWARE
+/*
+ *  The UltraStor 14F, 24F, and 34F are a family of intelligent, high
+ *  performance SCSI-2 host adapters.
+ *  Here is the scoop on the various models:
+ *
+ *  14F - ISA first-party DMA HA with floppy support and WD1003 emulation.
+ *  24F - EISA Bus Master HA with floppy support and WD1003 emulation.
+ *  34F - VESA Local-Bus Bus Master HA (no WD1003 emulation).
+ *
+ *  This code has been tested with up to two U14F boards, using both
+ *  firmware 28004-005/38004-004 (BIOS rev. 2.00) and the latest firmware
+ *  28004-006/38004-005 (BIOS rev. 2.01).
+ *
+ *  The latest firmware is required in order to get reliable operations when
+ *  clustering is enabled. ENABLE_CLUSTERING provides a performance increase
+ *  up to 50% on sequential access.
+ *
+ *  Since the Scsi_Host_Template structure is shared among all 14F and 34F,
+ *  the last setting of use_clustering is in effect for all of these boards.
+ *
+ *  Here a sample configuration using two U14F boards:
+ *
+ U14F0: ISA 0x330, BIOS 0xc8000, IRQ 11, DMA 5, SG 32, MB 16, of:n, lc:y, mq:8.
+ U14F1: ISA 0x340, BIOS 0x00000, IRQ 10, DMA 6, SG 32, MB 16, of:n, lc:y, mq:8.
+ *
+ *  The boot controller must have its BIOS enabled, while other boards can
+ *  have their BIOS disabled, or enabled to an higher address.
+ *  Boards are named Ux4F0, Ux4F1..., according to the port address order in
+ *  the io_port[] array.
+ *
+ *  The following facts are based on real testing results (not on
+ *  documentation) on the above U14F board.
+ *
+ *  - The U14F board should be jumpered for bus on time less or equal to 7
+ *    microseconds, while the default is 11 microseconds. This is order to
+ *    get acceptable performance while using floppy drive and hard disk
+ *    together. The jumpering for 7 microseconds is: JP13 pin 15-16,
+ *    JP14 pin 7-8 and pin 9-10.
+ *    The reduction has a little impact on scsi performance.
+ *
+ *  - If scsi bus length exceeds 3m., the scsi bus speed needs to be reduced
+ *    from 10Mhz to 5Mhz (do this by inserting a jumper on JP13 pin 7-8).
+ *
+ *  - If U14F on board firmware is older than 28004-006/38004-005,
+ *    the U14F board is unable to provide reliable operations if the scsi
+ *    request length exceeds 16Kbyte. When this length is exceeded the
+ *    behavior is:
+ *    - adapter_status equal 0x96 or 0xa3 or 0x93 or 0x94;
+ *    - adapter_status equal 0 and target_status equal 2 on for all targets
+ *      in the next operation following the reset.
+ *    This sequence takes a long time (>3 seconds), so in the meantime
+ *    the SD_TIMEOUT in sd.c could expire giving rise to scsi aborts
+ *    (SD_TIMEOUT has been increased from 3 to 6 seconds in 1.1.31).
+ *    Because of this I had to DISABLE_CLUSTERING and to work around the
+ *    bus reset in the interrupt service routine, returning DID_BUS_BUSY
+ *    so that the operations are retried without complains from the scsi.c
+ *    code.
+ *    Any reset of the scsi bus is going to kill tape operations, since
+ *    no retry is allowed for tapes. Bus resets are more likely when the
+ *    scsi bus is under heavy load.
+ *    Requests using scatter/gather have a maximum length of 16 x 1024 bytes
+ *    when DISABLE_CLUSTERING is in effect, but unscattered requests could be
+ *    larger than 16Kbyte.
+ *
+ *    The new firmware has fixed all the above problems.
+ *
+ *  For U34F boards the latest bios prom is 38008-002 (BIOS rev. 2.01),
+ *  the latest firmware prom is 28008-006. Older firmware 28008-005 has
+ *  problems when using more than 16 scatter/gather lists.
+ *
+ *  The list of i/o ports to be probed can be totally replaced by the
+ *  boot command line option: "u14-34f=port0,port1,port2,...", where the
+ *  port0, port1... arguments are ISA/VESA addresses to be probed.
+ *  For example using "u14-34f=0x230,0x340", the driver probes only the two
+ *  addresses 0x230 and 0x340 in this order; "u14-34f=0" totally disables
+ *  this driver.
+ *
+ *  After the optional list of detection probes, other possible command line
+ *  options are:
+ *
+ *  et:y  use disk geometry returned by scsicam_bios_param;
+ *  et:n  use disk geometry jumpered on the board;
+ *  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);
+ *  of:y  enables old firmware support;
+ *  of:n  disables old firmware support;
+ *  mq:xx set the max queue depth to the value xx (2 <= xx <= 8).
+ *
+ *  The default value is: "u14-34f=lc:n,of:n,mq:8,tm:0,et:n".
+ *  An example using the list of detection probes could be:
+ *  "u14-34f=0x230,0x340,lc:y,tm:2,of:n,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 u14-34f io_port=0x230,0x340 linked_comm=1 have_old_firmware=0 \
+ *                max_queue_depth=4 ext_tran=0 tag_mode=2
+ *
+ *  ----------------------------------------------------------------------------
+ *  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 boards are named Ux4F0, Ux4F1,... according to the detection order.
+ *
+ *  In order to support multiple ISA boards in a reliable way,
+ *  the driver sets host->wish_block = TRUE for all ISA boards.
+ */
+
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/byteorder.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 <asm/dma.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 u14_34f_detect(struct scsi_host_template *);
+static int u14_34f_release(struct Scsi_Host *);
+static int u14_34f_queuecommand(struct scsi_cmnd *, void (*done)(struct scsi_cmnd *));
+static int u14_34f_eh_abort(struct scsi_cmnd *);
+static int u14_34f_eh_host_reset(struct scsi_cmnd *);
+static int u14_34f_bios_param(struct scsi_device *, struct block_device *,
+                              sector_t, int *);
+static int u14_34f_slave_configure(struct scsi_device *);
+
+static struct scsi_host_template driver_template = {
+                .name                    = "UltraStor 14F/34F rev. 8.10.00 ",
+                .detect                  = u14_34f_detect,
+                .release                 = u14_34f_release,
+                .queuecommand            = u14_34f_queuecommand,
+                .eh_abort_handler        = u14_34f_eh_abort,
+                .eh_device_reset_handler = NULL,
+                .eh_bus_reset_handler    = NULL,
+                .eh_host_reset_handler   = u14_34f_eh_host_reset,
+                .bios_param              = u14_34f_bios_param,
+                .slave_configure         = u14_34f_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
+
+/* Values for the PRODUCT_ID ports for the 14/34F */
+#define PRODUCT_ID1  0x56
+#define PRODUCT_ID2  0x40        /* NOTE: Only upper nibble is used */
+
+/* Subversion values */
+#define ISA  0
+#define ESA 1
+
+#define OP_HOST_ADAPTER   0x1
+#define OP_SCSI           0x2
+#define OP_RESET          0x4
+#define DTD_SCSI          0x0
+#define DTD_IN            0x1
+#define DTD_OUT           0x2
+#define DTD_NONE          0x3
+#define HA_CMD_INQUIRY    0x1
+#define HA_CMD_SELF_DIAG  0x2
+#define HA_CMD_READ_BUFF  0x3
+#define HA_CMD_WRITE_BUFF 0x4
+
+#undef  DEBUG_LINKED_COMMANDS
+#undef  DEBUG_DETECT
+#undef  DEBUG_INTERRUPT
+#undef  DEBUG_RESET
+#undef  DEBUG_GENERATE_ERRORS
+#undef  DEBUG_GENERATE_ABORTS
+#undef  DEBUG_GEOMETRY
+
+#define MAX_ISA 3
+#define MAX_VESA 1
+#define MAX_EISA 0
+#define MAX_PCI 0
+#define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI)
+#define MAX_CHANNEL 1
+#define MAX_LUN 8
+#define MAX_TARGET 8
+#define MAX_MAILBOXES 16
+#define MAX_SGLIST 32
+#define MAX_SAFE_SGLIST 16
+#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 FALSE 0
+#define TRUE 1
+#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_LCL_MASK      0
+#define REG_LCL_INTR      1
+#define REG_SYS_MASK      2
+#define REG_SYS_INTR      3
+#define REG_PRODUCT_ID1   4
+#define REG_PRODUCT_ID2   5
+#define REG_CONFIG1       6
+#define REG_CONFIG2       7
+#define REG_OGM           8
+#define REG_ICM           12
+#define REGION_SIZE       13UL
+#define BSY_ASSERTED      0x01
+#define IRQ_ASSERTED      0x01
+#define CMD_RESET         0xc0
+#define CMD_OGM_INTR      0x01
+#define CMD_CLR_INTR      0x01
+#define CMD_ENA_INTR      0x81
+#define ASOK              0x00
+#define ASST              0x91
+
+#define YESNO(a) ((a) ? 'y' : 'n')
+#define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM)
+
+#define PACKED          __attribute__((packed))
+
+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)
+   unsigned char sg:1, ca:1, dcn:1, xdir:2, opcode:3;
+   unsigned char lun: 3, channel:2, target:3;
+#else
+   unsigned char opcode: 3,             /* type of command */
+                 xdir: 2,               /* data transfer direction */
+                 dcn: 1,                /* disable disconnect */
+                 ca: 1,                 /* use cache (if available) */
+                 sg: 1;                 /* scatter/gather operation */
+   unsigned char target: 3,             /* SCSI target id */
+                 channel: 2,            /* SCSI channel number */
+                 lun: 3;                /* SCSI logical unit number */
+#endif
+
+   unsigned int data_address PACKED;    /* transfer data pointer */
+   unsigned int data_len PACKED;        /* length in bytes */
+   unsigned int link_address PACKED;    /* for linking command chains */
+   unsigned char clink_id;              /* identifies command in chain */
+   unsigned char use_sg;                /* (if sg is set) 8 bytes per list */
+   unsigned char sense_len;
+   unsigned char cdb_len;               /* 6, 10, or 12 */
+   unsigned char cdb[12];               /* SCSI Command Descriptor Block */
+   unsigned char adapter_status;        /* non-zero indicates HA error */
+   unsigned char target_status;         /* non-zero indicates target error */
+   unsigned int sense_addr PACKED;
+
+   /* Additional fields begin here. */
+   struct scsi_cmnd *SCpnt;
+   unsigned int cpp_index;              /* cp index */
+
+   /* 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 TRUE 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 ESA */
+   struct pci_dev *pdev;                /* Always NULL */
+   unsigned char heads;
+   unsigned char sectors;
+   char board_id[256];                  /* data from INQUIRY on this board */
+   };
+
+static struct Scsi_Host *sh[MAX_BOARDS + 1];
+static const char *driver_name = "Ux4F";
+static char sha[MAX_BOARDS];
+static DEFINE_SPINLOCK(driver_lock);
+
+/* 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,
+
+   /* Possible ISA/VESA ports */
+   0x330, 0x340, 0x230, 0x240, 0x210, 0x130, 0x140,
+
+   /* End of list */
+   0x0
+   };
+
+#define HD(board) ((struct hostdata *) &sh[board]->hostdata)
+#define BN(board) (HD(board)->board_name)
+
+/* Device is Little Endian */
+#define H2DEV(x) cpu_to_le32(x)
+#define DEV2H(x) le32_to_cpu(x)
+
+static irqreturn_t do_interrupt_handler(int, void *, struct pt_regs *);
+static void flush_dev(struct scsi_device *, unsigned long, unsigned int, unsigned int);
+static int do_trace = FALSE;
+static int setup_done = FALSE;
+static int link_statistics;
+static int ext_tran = FALSE;
+
+#if defined(HAVE_OLD_UX4F_FIRMWARE)
+static int have_old_firmware = TRUE;
+#else
+static int have_old_firmware = FALSE;
+#endif
+
+#if defined(CONFIG_SCSI_U14_34F_TAGGED_QUEUE)
+static int tag_mode = TAG_SIMPLE;
+#else
+static int tag_mode = TAG_DISABLED;
+#endif
+
+#if defined(CONFIG_SCSI_U14_34F_LINKED_COMMANDS)
+static int linked_comm = TRUE;
+#else
+static int linked_comm = FALSE;
+#endif
+
+#if defined(CONFIG_SCSI_U14_34F_MAX_TAGS)
+static int max_queue_depth = CONFIG_SCSI_U14_34F_MAX_TAGS;
+#else
+static int max_queue_depth = MAX_CMD_PER_LUN;
+#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(u14_34f, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
+MODULE_PARM_DESC(u14_34f, " equivalent to the \"u14-34f=...\" kernel boot " \
+"option." \
+"      Example: modprobe u14-34f \"u14_34f=0x340,0x330,lc:y,tm:0,mq:4\"");
+MODULE_AUTHOR("Dario Ballabio");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("UltraStor 14F/34F SCSI Driver");
+
+#endif
+
+static int u14_34f_slave_configure(struct scsi_device *dev) {
+   int j, tqd, utqd;
+   char *tag_suffix, *link_suffix;
+   struct Scsi_Host *host = dev->host;
+
+   j = ((struct hostdata *) host->hostdata)->board_number;
+
+   utqd = MAX_CMD_PER_LUN;
+   tqd = max_queue_depth;
+
+   if (TLDEV(dev->type) && dev->tagged_supported)
+
+      if (tag_mode == TAG_SIMPLE) {
+         scsi_adjust_queue_depth(dev, MSG_SIMPLE_TAG, tqd);
+         tag_suffix = ", simple tags";
+         }
+      else if (tag_mode == TAG_ORDERED) {
+         scsi_adjust_queue_depth(dev, MSG_ORDERED_TAG, tqd);
+         tag_suffix = ", ordered tags";
+         }
+      else {
+         scsi_adjust_queue_depth(dev, 0, tqd);
+         tag_suffix = ", no tags";
+         }
+
+   else if (TLDEV(dev->type) && linked_comm) {
+      scsi_adjust_queue_depth(dev, 0, tqd);
+      tag_suffix = ", untagged";
+      }
+
+   else {
+      scsi_adjust_queue_depth(dev, 0, 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 = "";
+
+   printk("%s: scsi%d, channel %d, id %d, lun %d, cmds/lun %d%s%s.\n",
+          BN(j), host->host_no, dev->channel, dev->id, dev->lun,
+          dev->queue_depth, link_suffix, tag_suffix);
+
+   return FALSE;
+}
+
+static int wait_on_busy(unsigned long iobase, unsigned int loop) {
+
+   while (inb(iobase + REG_LCL_INTR) & BSY_ASSERTED) {
+      udelay(1L);
+      if (--loop == 0) return TRUE;
+      }
+
+   return FALSE;
+}
+
+static int board_inquiry(unsigned int j) {
+   struct mscp *cpp;
+   dma_addr_t id_dma_addr;
+   unsigned int time, limit = 0;
+
+   id_dma_addr = pci_map_single(HD(j)->pdev, HD(j)->board_id,
+                    sizeof(HD(j)->board_id), PCI_DMA_BIDIRECTIONAL);
+   cpp = &HD(j)->cp[0];
+   cpp->cp_dma_addr = pci_map_single(HD(j)->pdev, cpp, sizeof(struct mscp),
+                                     PCI_DMA_BIDIRECTIONAL);
+   memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
+   cpp->opcode = OP_HOST_ADAPTER;
+   cpp->xdir = DTD_IN;
+   cpp->data_address = H2DEV(id_dma_addr);
+   cpp->data_len = H2DEV(sizeof(HD(j)->board_id));
+   cpp->cdb_len = 6;
+   cpp->cdb[0] = HA_CMD_INQUIRY;
+
+   if (wait_on_busy(sh[j]->io_port, MAXLOOP)) {
+      printk("%s: board_inquiry, adapter busy.\n", BN(j));
+      return TRUE;
+      }
+
+   HD(j)->cp_stat[0] = IGNORE;
+
+   /* Clear the interrupt indication */
+   outb(CMD_CLR_INTR, sh[j]->io_port + REG_SYS_INTR);
+
+   /* Store pointer in OGM address bytes */
+   outl(H2DEV(cpp->cp_dma_addr), sh[j]->io_port + REG_OGM);
+
+   /* Issue OGM interrupt */
+   outb(CMD_OGM_INTR, sh[j]->io_port + REG_LCL_INTR);
+
+   spin_unlock_irq(&driver_lock);
+   time = jiffies;
+   while ((jiffies - time) < HZ && limit++ < 20000) udelay(100L);
+   spin_lock_irq(&driver_lock);
+
+   if (cpp->adapter_status || HD(j)->cp_stat[0] != FREE) {
+      HD(j)->cp_stat[0] = FREE;
+      printk("%s: board_inquiry, err 0x%x.\n", BN(j), cpp->adapter_status);
+      return TRUE;
+      }
+
+   pci_unmap_single(HD(j)->pdev, cpp->cp_dma_addr, sizeof(struct mscp),
+                    PCI_DMA_BIDIRECTIONAL);
+   pci_unmap_single(HD(j)->pdev, id_dma_addr, sizeof(HD(j)->board_id),
+                    PCI_DMA_BIDIRECTIONAL);
+   return FALSE;
+}
+
+static int port_detect \
+      (unsigned long port_base, unsigned int j, struct scsi_host_template *tpnt) {
+   unsigned char irq, dma_channel, subversion, i;
+   unsigned char in_byte;
+   char *bus_type, dma_name[16];
+
+   /* Allowed BIOS base addresses (NULL indicates reserved) */
+   unsigned long bios_segment_table[8] = {
+      0,
+      0xc4000, 0xc8000, 0xcc000, 0xd0000,
+      0xd4000, 0xd8000, 0xdc000
+      };
+
+   /* Allowed IRQs */
+   unsigned char interrupt_table[4] = { 15, 14, 11, 10 };
+
+   /* Allowed DMA channels for ISA (0 indicates reserved) */
+   unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
+
+   /* Head/sector mappings */
+   struct {
+      unsigned char heads;
+      unsigned char sectors;
+      } mapping_table[4] = {
+           { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 }
+           };
+
+   struct config_1 {
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+      unsigned char dma_channel: 2, interrupt:2,
+                    removable_disks_as_fixed:1, bios_segment: 3;
+#else
+      unsigned char bios_segment: 3, removable_disks_as_fixed: 1,
+                    interrupt: 2, dma_channel: 2;
+#endif
+
+      } config_1;
+
+   struct config_2 {
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+      unsigned char tfr_port: 2, bios_drive_number: 1,
+                    mapping_mode: 2, ha_scsi_id: 3;
+#else
+      unsigned char ha_scsi_id: 3, mapping_mode: 2,
+                    bios_drive_number: 1, tfr_port: 2;
+#endif
+
+      } config_2;
+
+   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;
+      }
+
+   spin_lock_irq(&driver_lock);
+
+   if (inb(port_base + REG_PRODUCT_ID1) != PRODUCT_ID1) goto freelock;
+
+   in_byte = inb(port_base + REG_PRODUCT_ID2);
+
+   if ((in_byte & 0xf0) != PRODUCT_ID2) goto freelock;
+
+   *(char *)&config_1 = inb(port_base + REG_CONFIG1);
+   *(char *)&config_2 = inb(port_base + REG_CONFIG2);
+
+   irq = interrupt_table[config_1.interrupt];
+   dma_channel = dma_channel_table[config_1.dma_channel];
+   subversion = (in_byte & 0x0f);
+
+   /* Board detected, allocate its IRQ */
+   if (request_irq(irq, do_interrupt_handler,
+             SA_INTERRUPT | ((subversion == ESA) ? SA_SHIRQ : 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 (have_old_firmware) tpnt->use_clustering = DISABLE_CLUSTERING;
+
+   spin_unlock_irq(&driver_lock);
+   sh[j] = scsi_register(tpnt, sizeof(struct hostdata));
+   spin_lock_irq(&driver_lock);
+
+   if (sh[j] == NULL) {
+      printk("%s: unable to register host, detaching.\n", name);
+      goto freedma;
+      }
+
+   sh[j]->io_port = port_base;
+   sh[j]->unique_id = port_base;
+   sh[j]->n_io_port = REGION_SIZE;
+   sh[j]->base = bios_segment_table[config_1.bios_segment];
+   sh[j]->irq = irq;
+   sh[j]->sg_tablesize = MAX_SGLIST;
+   sh[j]->this_id = config_2.ha_scsi_id;
+   sh[j]->can_queue = MAX_MAILBOXES;
+   sh[j]->cmd_per_lun = MAX_CMD_PER_LUN;
+
+#if defined(DEBUG_DETECT)
+   {
+   unsigned char sys_mask, lcl_mask;
+
+   sys_mask = inb(sh[j]->io_port + REG_SYS_MASK);
+   lcl_mask = inb(sh[j]->io_port + REG_LCL_MASK);
+   printk("SYS_MASK 0x%x, LCL_MASK 0x%x.\n", sys_mask, lcl_mask);
+   }
+#endif
+
+   /* Probably a bogus host scsi id, set it to the dummy value */
+   if (sh[j]->this_id == 0) sh[j]->this_id = -1;
+
+   /* If BIOS is disabled, force enable interrupts */
+   if (sh[j]->base == 0) outb(CMD_ENA_INTR, sh[j]->io_port + REG_SYS_MASK);
+
+   memset(HD(j), 0, sizeof(struct hostdata));
+   HD(j)->heads = mapping_table[config_2.mapping_mode].heads;
+   HD(j)->sectors = mapping_table[config_2.mapping_mode].sectors;
+   HD(j)->subversion = subversion;
+   HD(j)->pdev = NULL;
+   HD(j)->board_number = j;
+
+   if (have_old_firmware) sh[j]->sg_tablesize = MAX_SAFE_SGLIST;
+
+   if (HD(j)->subversion == ESA) {
+      sh[j]->unchecked_isa_dma = FALSE;
+      sh[j]->dma_channel = NO_DMA;
+      sprintf(BN(j), "U34F%d", j);
+      bus_type = "VESA";
+      }
+   els