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+/*
+ * eata.c - Low-level driver for EATA/DMA SCSI host adapters.
+ *
+ * 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) 1994-1998 Dario Ballabio (dario@milano.europe.dg.com)
+ *
+ * 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)
+ *
+ * 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 then 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:
+ *
+ * eh:y use new scsi code (linux 2.2 only);
+ * eh:n use old scsi code;
+ * 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;
+ * tc:y enables tagged commands;
+ * tc:n disables tagged commands;
+ * tm:0 use head/simple/ordered queue tag sequences;
+ * tm:1 use only simple queue tags;
+ * tm:2 use only head of queue tags;
+ * tm:3 use only ordered queue tags;
+ * mq:xx set the max queue depth to the value xx (2 <= xx <= 32).
+ *
+ * The default value is: "eata=lc:n,tc:n,mq:16,tm:0,et:n,rs:n".
+ * An example using the list of detection probes could be:
+ * "eata=0x7410,0x230,lc:y,tc:n,mq:4,eh:n,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 tagged_comm=0 \
+ * max_queue_depth=4 tag_mode=0 use_new_eh_code=0 \
+ * ext_tran=0 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 = TRUE for all ISA boards.
+ */
+
+#include <linux/version.h>
+
+#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s))
+#define MAX_INT_PARAM 10
+
+#if defined(MODULE)
+#include <linux/module.h>
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,26)
+MODULE_PARM(io_port, "1-" __MODULE_STRING(MAX_INT_PARAM) "i");
+MODULE_PARM(linked_comm, "i");
+MODULE_PARM(tagged_comm, "i");
+MODULE_PARM(link_statistics, "i");
+MODULE_PARM(max_queue_depth, "i");
+MODULE_PARM(tag_mode, "i");
+MODULE_PARM(use_new_eh_code, "i");
+MODULE_PARM(ext_tran, "i");
+MODULE_PARM(rev_scan, "i");
+MODULE_AUTHOR("Dario Ballabio");
+#endif
+
+#endif
+
+#include <linux/string.h>
+#include <linux/sched.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/blk.h>
+#include "scsi.h"
+#include "hosts.h"
+#include "sd.h"
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include "eata.h"
+#include <linux/stat.h>
+#include <linux/config.h>
+#include <linux/pci.h>
+
+#if LINUX_VERSION_CODE < LinuxVersionCode(2,1,93)
+#include <linux/bios32.h>
+#endif
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,36)
+#include <linux/init.h>
+#else
+#define __initfunc(A) A
+#define __initdata
+#define __init
+#endif
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101)
+#include <asm/spinlock.h>
+#define IRQ_FLAGS
+#define IRQ_LOCK
+#define IRQ_LOCK_SAVE
+#define IRQ_UNLOCK
+#define IRQ_UNLOCK_RESTORE
+#define SPIN_FLAGS unsigned long spin_flags;
+#define SPIN_LOCK spin_lock_irq(&io_request_lock);
+#define SPIN_LOCK_SAVE spin_lock_irqsave(&io_request_lock, spin_flags);
+#define SPIN_UNLOCK spin_unlock_irq(&io_request_lock);
+#define SPIN_UNLOCK_RESTORE \
+ spin_unlock_irqrestore(&io_request_lock, spin_flags);
+static int use_new_eh_code = TRUE;
+#else
+#define IRQ_FLAGS unsigned long irq_flags;
+#define IRQ_LOCK cli();
+#define IRQ_LOCK_SAVE do {save_flags(irq_flags); cli();} while (0);
+#define IRQ_UNLOCK sti();
+#define IRQ_UNLOCK_RESTORE do {restore_flags(irq_flags);} while (0);
+#define SPIN_FLAGS
+#define SPIN_LOCK
+#define SPIN_LOCK_SAVE
+#define SPIN_UNLOCK
+#define SPIN_UNLOCK_RESTORE
+static int use_new_eh_code = FALSE;
+#endif
+
+struct proc_dir_entry proc_scsi_eata2x = {
+ PROC_SCSI_EATA2X, 6, "eata2x",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+/* 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 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_MIXED 0
+#define TAG_SIMPLE 1
+#define TAG_HEAD 2
+#define TAG_ORDERED 3
+
+#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 9
+#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 ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr)[0])
+#define YESNO(a) ((a) ? 'y' : 'n')
+#define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM)
+
+/* "EATA", in Big Endian format */
+#define EATA_SIGNATURE 0x41544145
+
+/* 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 {
+ ulong data_len; /* Number of valid bytes after this field */
+ ulong sign; /* ASCII "EATA" signature */
+ 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 */
+ 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 */
+ ulong cp_len; /* Number of valid bytes in cp */
+ ulong 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 */
+ 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 */
+ 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 */
+ 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;
+ unchar cpad[511];
+ };
+
+/* Returned status packet structure */
+struct mssp {
+ unchar adapter_status:7, /* State related to current command */
+ eoc:1; /* End Of Command (1 = command completed) */
+ unchar target_status; /* SCSI status received after data transfer */
+ unchar unused[2];
+ ulong inv_res_len; /* Number of bytes not transferred */
+ struct mscp *cpp; /* 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 {
+ 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 */
+ unchar mess[3]; /* Massage to/from Target */
+ unchar cdb[12]; /* Command Descriptor Block */
+ ulong data_len; /* If sg=0 Data Length, if sg=1 sglist length */
+ struct mscp *cpp; /* Address to be returned in sp */
+ ulong data_address; /* If sg=0 Data Address, if sg=1 sglist address */
+ ulong sp_addr; /* Address where sp is DMA'ed when cp completes */
+ ulong sense_addr; /* Address where Sense Data is DMA'ed on error */
+ Scsi_Cmnd *SCpnt;
+ unsigned int index; /* cp index */
+ struct sg_list *sglist;
+ };
+
+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 */
+ char board_id[256]; /* data from INQUIRY on 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 EISA/PCI */
+ unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */
+ struct mssp sp[2]; /* Returned status for this board */
+ };
+
+static struct Scsi_Host *sh[MAX_BOARDS + 1];
+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[] __initdata = {
+
+ /* 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
+ };
+
+#define HD(board) ((struct hostdata *) &sh[board]->hostdata)
+#define BN(board) (HD(board)->board_name)
+
+#define H2DEV(x) htonl(x)
+#define DEV2H(x) H2DEV(x)
+#define V2DEV(addr) ((addr) ? H2DEV(virt_to_bus((void *)addr)) : 0)
+#define DEV2V(addr) ((addr) ? DEV2H(bus_to_virt((unsigned long)addr)) : 0)
+
+static void do_interrupt_handler(int, void *, struct pt_regs *);
+static void flush_dev(Scsi_Device *, unsigned long, unsigned int, unsigned int);
+static int do_trace = FALSE;
+static int setup_done = FALSE;
+static int link_statistics = 0;
+static int tag_mode = TAG_MIXED;
+static int ext_tran = FALSE;
+static int rev_scan = TRUE;
+
+#if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
+static int tagged_comm = TRUE;
+#else
+static int tagged_comm = FALSE;
+#endif
+
+#if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
+static int linked_comm = TRUE;
+#else
+static int linked_comm = FALSE;
+#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
+
+static void select_queue_depths(struct Scsi_Host *host, Scsi_Device *devlist) {
+ Scsi_Device *dev;
+ int j, ntag = 0, nuntag = 0, tqd, utqd;
+ IRQ_FLAGS
+
+ IRQ_LOCK_SAVE
+ j = ((struct hostdata *) host->hostdata)->board_number;
+
+ for(dev = devlist; dev; dev = dev->next) {
+
+ if (dev->host != host) continue;
+
+ if (TLDEV(dev->type) && (dev->tagged_supported || linked_comm))
+ ntag++;
+ else
+ nuntag++;
+ }
+
+ utqd = MAX_CMD_PER_LUN;
+
+ tqd = (host->can_queue - utqd * nuntag) / (ntag ? ntag : 1);
+
+ if (tqd > max_queue_depth) tqd = max_queue_depth;
+
+ if (tqd < MAX_CMD_PER_LUN) tqd = MAX_CMD_PER_LUN;
+
+ for(dev = devlist; dev; dev = dev->next) {
+ char *tag_suffix = "", *link_suffix = "";
+
+ if (dev->host != host) continue;
+
+ if (TLDEV(dev->type) && (dev->tagged_supported || linked_comm))
+ dev->queue_depth = tqd;
+ else
+ dev->queue_depth = utqd;
+
+ if (TLDEV(dev->type)) {
+ if (linked_comm && dev->queue_depth > 2)
+ link_suffix = ", sorted";
+ else
+ link_suffix = ", unsorted";
+ }
+
+ if (tagged_comm && dev->tagged_supported && TLDEV(dev->type)) {
+ dev->tagged_queue = 1;
+ dev->current_tag = 1;
+ }
+
+ if (dev->tagged_supported && TLDEV(dev->type) && dev->tagged_queue)
+ tag_suffix = ", tagged";
+ else if (dev->tagged_supported && TLDEV(dev->type))
+ tag_suffix = ", untagged";
+
+ 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);
+ }
+
+ IRQ_UNLOCK_RESTORE
+ return;
+}
+
+static inline int wait_on_busy(unsigned long iobase, unsigned int loop) {
+
+ while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
+ udelay(1L);
+ if (--loop == 0) return TRUE;
+ }
+
+ return FALSE;
+}
+
+static inline int do_dma(unsigned long iobase, unsigned int addr, unchar cmd) {
+
+ if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP))) return TRUE;
+
+ if ((addr = V2DEV(addr))) {
+ outb((char) (addr >> 24), iobase + REG_LOW);
+ outb((char) (addr >> 16), iobase + REG_LM);
+ outb((char) (addr >> 8), iobase + REG_MID);
+ outb((char) addr, iobase + REG_MSB);
+ }
+
+ outb(cmd, iobase + REG_CMD);
+ return FALSE;
+}
+
+static inline 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 TRUE;
+ }
+
+ loop = MAXLOOP;
+ *p = inw(iobase);
+ }
+
+ return FALSE;
+}
+
+__initfunc (static inline int
+ get_pci_irq(unsigned long port_base, unsigned char *apic_irq)) {
+
+#if defined(CONFIG_PCI)
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
+
+ unsigned int addr;
+ struct pci_dev *dev = NULL;
+
+ if (!pci_present()) return FALSE;
+
+ while((dev = pci_find_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
+
+ if (pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &addr)) continue;
+
+#if defined(DEBUG_PCI_DETECT)
+ printk("%s: get_pci_irq, bus %d, devfn 0x%x, addr 0x%x, apic_irq %u.\n",
+ driver_name, dev->bus->number, dev->devfn, addr, dev->irq);
+#endif
+
+ if ((addr & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_IO)
+ continue;
+
+ if ((addr & PCI_BASE_ADDRESS_IO_MASK) + PCI_BASE_ADDRESS_0 == port_base) {
+ *apic_irq = dev->irq;
+ return TRUE;
+ }
+
+ }
+
+#endif /* end new style PCI code */
+
+#endif /* end CONFIG_PCI */
+
+ return FALSE;
+}
+
+__initfunc (static inline int port_detect \
+ (unsigned long port_base, unsigned int j, Scsi_Host_Template *tpnt)) {
+ unsigned char irq, dma_channel, subversion, i;
+ unsigned char protocol_rev, apic_irq;
+ struct eata_info info;
+ char *bus_type, dma_name[16], tag_type;
+
+ /* Allowed DMA channels for ISA (0 indicates reserved) */
+ unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
+
+ char name[16];
+
+ sprintf(name, "%s%d", driver_name, j);
+
+ if(check_region(port_base, REGION_SIZE)) {
+ printk("%s: address 0x%03lx in use, skipping probe.\n", name, port_base);
+ return FALSE;
+ }
+
+ if (do_dma(port_base, 0, READ_CONFIG_PIO)) return FALSE;
+
+ /* Read the info structure */
+ if (read_pio(port_base, (ushort *)&info, (ushort *)&info.ipad[0]))
+ return FALSE;
+
+ /* Check the controller "EATA" signature */
+ if (info.sign != EATA_SIGNATURE) return FALSE;
+
+ if (DEV2H(info.data_len) < EATA_2_0A_SIZE) {
+ printk("%s: config structure size (%ld bytes) too short, detaching.\n",
+ name, DEV2H(info.data_len));
+ return FALSE;
+ }
+ else if (DEV2H(info.data_len) == EATA_2_0A_SIZE)
+ protocol_rev = 'A';
+ else if (DEV2H(info.data_len) == EATA_2_0B_SIZE)
+ protocol_rev = 'B';
+ else
+ protocol_rev = 'C';
+
+ if (!setup_done && j > 0 && j <= MAX_PCI) {
+ bus_type = "PCI";
+ subversion = ESA;
+ }
+ else if (port_base > MAX_EISA_ADDR || (protocol_rev == 'C' && info.pci)) {
+ bus_type = "PCI";
+ 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";
+ 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);
+ return FALSE;
+ }
+
+ 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 (get_pci_irq(port_base, &apic_irq) && (irq != apic_irq)) {
+ printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq, apic_irq);
+ irq = apic_irq;
+ }
+
+ /* 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);
+ return FALSE;
+ }
+
+ if (subversion == ISA && request_dma(dma_channel, driver_name)) {
+ printk("%s: unable to allocate DMA channel %u, detaching.\n",
+ name, dma_channel);
+ free_irq(irq, &sha[j]);
+ return FALSE;
+ }
+
+#if defined(FORCE_CONFIG)
+ {
+ struct eata_config config;
+
+ /* Set board configuration */
+ memset((char *)&config, 0, sizeof(struct eata_config));
+ config.len = (ushort) htons((ushort)510);
+ config.ocena = TRUE;
+
+ if (do_dma(port_base, (unsigned int)&config, SET_CONFIG_DMA)) {
+ printk("%s: busy timeout sending configuration, detaching.\n", name);
+ return FALSE;
+ }
+ }
+#endif
+
+ sh[j] = scsi_register(tpnt, sizeof(struct hostdata));
+
+ if (sh[j] == NULL) {
+ printk("%s: unable to register host, detaching.\n", name);
+
+ free_irq(irq, &sha[j]);
+
+ if (subversion == ISA) free_dma(dma_channel);
+
+ return FALSE;
+ }
+
+ sh[j]->io_port = port_base;
+ sh[j]->unique_id = port_base;
+ sh[j]->n_io_port = REGION_SIZE;
+ sh[j]->dma_channel = dma_channel;
+ sh[j]->irq = irq;
+ sh[j]->sg_tablesize = (ushort) ntohs(info.scatt_size);
+ sh[j]->this_id = (ushort) info.host_addr[3];
+ sh[j]->can_queue = (ushort) ntohs(info.queue_size);
+ sh[j]->cmd_per_lun = MAX_CMD_PER_LUN;
+ sh[j]->select_queue_depths = select_queue_depths;
+
+ /* Register the I/O space that we use */
+ request_region(sh[j]->io_port, sh[j]->n_io_port, driver_name);
+
+ memset(HD(j), 0, sizeof(struct hostdata));
+ HD(j)->subversion = subversion;
+ HD(j)->protocol_rev = protocol_rev;
+ HD(j)->board_number = j;
+
+ if (HD(j)->subversion == ESA)
+ sh[j]->unchecked_isa_dma = FALSE;
+ else {
+ sh[j]->wish_block = TRUE;
+ sh[j]->unchecked_isa_dma = TRUE;
+ disable_dma(dma_channel);
+ clear_dma_ff(dma_channel);
+ set_dma_mode(dma_channel, DMA_MODE_CASCADE);
+ enable_dma(dma_channel);
+ }
+
+ strcpy(BN(j), name);
+
+ /* DPT PM2012 does not allow to detect sg_tablesize correctly */
+ if (sh[j]->sg_tablesize > MAX_SGLIST || sh[j]->sg_tablesize < 2) {
+ printk("%s: detect, wrong n. of SG lists %d, fixed.\n",
+ BN(j), sh[j]->sg_tablesize);
+ sh[j]->sg_tablesize = MAX_SGLIST;
+ }
+
+ /* DPT PM2012 does not allow to detect can_queue correctly */
+ if (sh[j]->can_queue > MAX_MAILBOXES || sh[j]->can_queue < 2) {
+ printk("%s: detect, wrong n. of mbox %d, fixed.\n",
+ BN(j), sh[j]->can_queue);
+ sh[j]->can_queue = MAX_MAILBOXES;
+ }
+
+ if (protocol_rev != 'A') {
+
+ if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL)
+ sh[j]->max_channel = info.max_chan;
+
+ if (info.max_id > 7 && info.max_id < MAX_TARGET)
+ sh[j]->max_id = info.max_id + 1;
+
+ if (info.large_sg && sh[j]->sg_tablesize == MAX_SGLIST)
+ sh[j]->sg_tablesize = MAX_LARGE_SGLIST;
+ }
+
+ if (protocol_rev == 'C') {
+
+ if (info.max_lun > 7 && info.max_lun < MAX_LUN)
+ sh[j]->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 < sh[j]->can_queue; i++)
+ if (! ((&HD(j)->cp[i])->sglist = kmalloc(
+ sh[j]->sg_tablesize * sizeof(struct sg_list),
+ (sh[j]->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC))) {
+ printk("%s: kmalloc SGlist failed, mbox %d, detaching.\n", BN(j), i);
+ eata2x_release(sh[j]);
+ return FALSE;
+ }
+
+ 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 (tagged_comm) {
+ if (tag_mode == TAG_SIMPLE) tag_type = '1';
+ else if (tag_mode == TAG_HEAD) tag_type = '2';
+ else if (tag_mode == TAG_ORDERED) tag_type = '3';
+ else tag_type = 'y';
+ }
+ else tag_type = 'n';
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101)
+ sh[j]->hostt->use_new_eh_code = use_new_eh_code;
+#else
+ use_new_eh_code = FALSE;
+#endif
+
+ if (j == 0) {
+ printk("EATA/DMA 2.0x: Copyright (C) 1994-1998 Dario Ballabio.\n");
+ printk("%s config options -> tc:%c, lc:%c, mq:%d, eh:%c, rs:%c, et:%c.\n",
+ driver_name, tag_type, YESNO(linked_comm), max_queue_depth,
+ YESNO(use_new_eh_code), YESNO(rev_scan), YESNO(ext_tran));
+ }
+
+ printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
+ BN(j), HD(j)->protocol_rev, bus_type, (unsigned long)sh[j]->io_port,
+ sh[j]->irq, dma_name, sh[j]->sg_tablesize, sh[j]->can_queue);
+
+ if (sh[j]->max_id > 8 || sh[j]->max_lun > 8)
+ printk("%s: wide SCSI support enabled, max_id %u, max_lun %u.\n",
+ BN(j), sh[j]->max_id, sh[j]->max_lun);
+
+ for (i = 0; i <= sh[j]->max_channel; i++)
+ printk("%s: SCSI channel %u enabled, host target ID %d.\n",
+ BN(j), 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 %ld, cpl %ld spl %ld.\n", name, info.version,
+ info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync,
+ info.second, DEV2H(info.data_len), DEV2H(info.cp_len),
+ DEV2H(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
+
+ return TRUE;
+}
+
+__initfunc (void eata2x_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 = TRUE;
+ }
+
+ while (cur && (pc = strchr(cur, ':'))) {
+ int val = 0, c = *++pc;
+
+ if (c == 'n' || c == 'N') val = FALSE;
+ else if (c == 'y' || c == 'Y') val = TRUE;
+ else val = (int) simple_strtoul(pc, NULL, 0);
+
+ if (!strncmp(cur, "lc:", 3)) linked_comm = val;
+ else if (!strncmp(cur, "tc:", 3)) tagged_comm = val;
+ else if (!strncmp(cur, "tm:", 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, "eh:", 3)) use_new_eh_code = val;
+ else if (!strncmp(cur, "et:", 3)) ext_tran = val;
+ else if (!strncmp(cur, "rs:", 3)) rev_scan = val;
+
+ if ((cur = strchr(cur, ','))) ++cur;
+ }
+
+ return;
+}
+
+__initfunc (static void add_pci_ports(void)) {
+
+#if defined(CONFIG_PCI)
+
+ unsigned int addr, k;
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
+
+ struct pci_dev *dev = NULL;
+
+ if (!pci_present()) return;
+
+ for (k = 0; k < MAX_PCI; k++) {
+
+ if (!(dev = pci_find_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) break;
+
+ if (pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &addr)) continue;
+
+#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
+
+ if ((addr & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_IO)
+ continue;
+
+ /* Order addresses according to rev_scan value */
+ io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
+ (addr & PCI_BASE_ADDRESS_IO_MASK) + PCI_BASE_ADDRESS_0;
+ }
+
+#else /* else old style PCI code */
+
+ unsigned short i = 0;
+ unsigned char bus, devfn;
+
+ if (!pcibios_present()) return;
+
+ for (k = 0; k < MAX_PCI; k++) {
+
+ if (pcibios_find_class(PCI_CLASS_STORAGE_SCSI << 8, i++, &bus, &devfn)
+ != PCIBIOS_SUCCESSFUL) break;
+
+ if (pcibios_read_config_dword(bus, devfn, PCI_BASE_ADDRESS_0, &addr)
+ != PCIBIOS_SUCCESSFUL) continue;
+
+#if defined(DEBUG_PCI_DETECT)
+ printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n",
+ driver_name, k, bus, devfn, addr);
+#endif
+
+ if ((addr & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_IO)
+ continue;
+
+ /* Order addresses according to rev_scan value */
+ io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
+ (addr & PCI_BASE_ADDRESS_IO_MASK) + PCI_BASE_ADDRESS_0;
+ }
+
+#endif /* end old style PCI code */
+
+#endif /* end CONFIG_PCI */
+
+ return;
+}
+
+__initfunc (int eata2x_detect(Scsi_Host_Template *tpnt)) {
+ unsigned int j = 0, k;
+ IRQ_FLAGS
+
+ IRQ_LOCK_SAVE
+ tpnt->proc_dir = &proc_scsi_eata2x;
+
+#if defined(MODULE)
+ /* io_port could have been modified when loading as a module */
+ if(io_port[0] != SKIP) {
+ setup_done = TRUE;
+ io_port[MAX_INT_PARAM] = 0;
+ }
+#endif
+
+ for (k = 0; k < MAX_BOARDS + 1; k++) sh[k] = NULL;
+
+ if (!setup_done) add_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;
+ IRQ_UNLOCK_RESTORE
+ return j;
+}
+
+static inline void build_sg_list(struct mscp *cpp, Scsi_Cmnd *SCpnt) {
+ unsigned int k;
+ struct scatterlist *sgpnt;
+
+ sgpnt = (struct scatterlist *) SCpnt->request_buffer;
+
+ for (k = 0; k < SCpnt->use_sg; k++) {
+ cpp->sglist[k].address = V2DEV(sgpnt[k].address);
+ cpp->sglist[k].num_bytes = H2DEV(sgpnt[k].length);
+ }
+
+ cpp->data_address = V2DEV(cpp->sglist);
+ cpp->data_len = H2DEV((SCpnt->use_sg * sizeof(struct sg_list)));
+}
+
+static inline int do_qcomm(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)) {
+ unsigned int i, j, k;
+ struct mscp *cpp;
+ struct mssp *spp;
+
+ 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
+ };
+
+ 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
+ };
+
+ /* j is the board number */
+ j = ((struct hostdata *) SCpnt->host->hostdata)->board_number;
+
+ if (SCpnt->host_scribble)
+ panic("%s: qcomm, pid %ld, SCpnt %p already active.\n",
+ BN(j), SCpnt->pid, SCpnt);
+
+ /* i is the mailbox number, look for the first free mailbox
+ starting from last_cp_used */
+ i = HD(j)->last_cp_used + 1;
+
+ for (k = 0; k < sh[j]->can_queue; k++, i++) {
+
+ if (i >= sh[j]->can_queue) i = 0;
+
+ if (HD(j)->cp_stat[i] == FREE) {
+ HD(j)->last_cp_used = i;
+ break;
+ }
+ }
+
+ if (k == sh[j]->can_queue) {
+ printk("%s: qcomm, no free mailbox.\n", BN(j));
+ return 1;
+ }
+
+ /* Set pointer to control packet structure */
+ cpp = &HD(j)->cp[i];
+
+ memset(cpp, 0, sizeof(struct mscp) - sizeof(struct sg_list *));
+
+ /* Set pointer to status packet structure */
+ spp = &HD(j)->sp[0];
+
+ /* The EATA protocol uses Big Endian format */
+ cpp->sp_addr = V2DEV(spp);
+
+ cpp->cpp = cpp;
+ SCpnt->scsi_done = done;
+ cpp->index = i;
+ SCpnt->host_scribble = (unsigned char *) &cpp->index;
+
+ if (do_trace) printk("%s: qcomm, mbox %d, target %d.%d:%d, pid %ld.\n",
+ BN(j), i, SCpnt->channel, SCpnt->target,
+ SCpnt->lun, SCpnt->pid);
+
+ for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
+ if (SCpnt->cmnd[0] == data_out_cmds[k]) {
+ cpp->dout = TRUE;
+ 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 = FALSE;
+ break;
+ }
+
+ cpp->reqsen = TRUE;
+ cpp->dispri = TRUE;
+#if 0
+ if (SCpnt->device->type == TYPE_TAPE) cpp->hbaci = TRUE;
+#endif
+ cpp->one = TRUE;
+ cpp->channel = SCpnt->channel;
+ cpp->target = SCpnt->target;
+ cpp->lun = SCpnt->lun;
+ cpp->SCpnt = SCpnt;
+ cpp->sense_addr = V2DEV(SCpnt->sense_buffer);
+ cpp->sense_len = sizeof SCpnt->sense_buffer;
+
+ if (SCpnt->device->tagged_queue) {
+
+ if (HD(j)->target_redo[SCpnt->target][SCpnt->channel] ||
+ HD(j)->target_to[SCpnt->target][SCpnt->channel])
+ cpp->mess[0] = ORDERED_QUEUE_TAG;
+ else if (tag_mode == TAG_SIMPLE) cpp->mess[0] = SIMPLE_QUEUE_TAG;
+ else if (tag_mode == TAG_HEAD) cpp->mess[0] = HEAD_OF_QUEUE_TAG;
+ else if (tag_mode == TAG_ORDERED) cpp->mess[0] = ORDERED_QUEUE_TAG;
+ else if (SCpnt->device->current_tag == 0)
+ cpp->mess[0] = ORDERED_QUEUE_TAG;
+ else if (SCpnt->device->current_tag == 1)
+ cpp->mess[0] = HEAD_OF_QUEUE_TAG;
+ else
+ cpp->mess[0] = SIMPLE_QUEUE_TAG;
+
+ cpp->mess[1] = SCpnt->device->current_tag++;
+ }
+
+ if (SCpnt->use_sg) {
+ cpp->sg = TRUE;
+ build_sg_list(cpp, SCpnt);
+ }
+ else {
+ cpp->data_address = V2DEV(SCpnt->request_buffer);
+ cpp->data_len = H2DEV(SCpnt->request_bufflen);
+ }
+
+ memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
+
+ if (linked_comm && SCpnt->device->queue_depth > 2
+ && TLDEV(SCpnt->device->type)) {
+ HD(j)->cp_stat[i] = READY;
+ flush_dev(SCpnt->device, SCpnt->request.sector, j, FALSE);
+ return 0;
+ }
+
+ /* Send control packet to the board */
+ if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) {
+ SCpnt->host_scribble = NULL;
+ printk("%s: qcomm, target %d.%d:%d, pid %ld, adapter busy.\n",
+ BN(j), SCpnt->channel, SCpnt->target, SCpnt->lun, SCpnt->pid);
+ return 1;
+ }
+
+ HD(j)->cp_stat[i] = IN_USE;
+ return 0;
+}
+
+int eata2x_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)) {
+ int rtn;
+ IRQ_FLAGS
+
+ IRQ_LOCK_SAVE
+ rtn = do_qcomm(SCpnt, done);
+ IRQ_UNLOCK_RESTORE
+ return rtn;
+}
+
+static inline int do_old_abort(Scsi_Cmnd *SCarg) {
+ unsigned int i, j;
+
+ j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
+
+ if (SCarg->host_scribble == NULL ||
+ (SCarg->serial_number_at_timeout &&
+ (SCarg->serial_number != SCarg->serial_number_at_timeout))) {
+ printk("%s: abort, target %d.%d:%d, pid %ld inactive.\n",
+ BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid);
+ return SCSI_ABORT_NOT_RUNNING;
+ }
+
+ i = *(unsigned int *)SCarg->host_scribble;
+ printk("%s: abort, mbox %d, target %d.%d:%d, pid %ld.\n",
+ BN(j), i, SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid);
+
+ if (i >= sh[j]->can_queue)
+ panic("%s: abort, invalid SCarg->host_scribble.\n", BN(j));
+
+ if (wait_on_busy(sh[j]->io_port, MAXLOOP)) {
+ printk("%s: abort, timeout error.\n", BN(j));
+ return SCSI_ABORT_ERROR;
+ }
+
+ if (HD(j)->cp_stat[i] == FREE) {
+ printk("%s: abort, mbox %d is free.\n", BN(j), i);
+ return SCSI_ABORT_NOT_RUNNING;
+ }
+
+ if (HD(j)->cp_stat[i] == IN_USE) {
+ printk("%s: abort, mbox %d is in use.\n", BN(j), i);
+
+ if (SCarg != HD(j)->cp[i].SCpnt)
+ panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
+ BN(j), i, SCarg, HD(j)->cp[i].SCpnt);
+
+ if (inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
+ printk("%s: abort, mbox %d, interrupt pending.\n", BN(j), i);
+
+ return SCSI_ABORT_SNOOZE;
+ }
+
+ if (HD(j)->cp_stat[i] == IN_RESET) {
+ printk("%s: abort, mbox %d is in reset.\n", BN(j), i);
+ return SCSI_ABORT_ERROR;
+ }
+
+ if (HD(j)->cp_stat[i] == LOCKED) {
+ printk("%s: abort, mbox %d is locked.\n", BN(j), i);
+ return SCSI_ABORT_NOT_RUNNING;
+ }
+
+ if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) {
+ SCarg->result = DID_ABORT << 16;
+ SCarg->host_scribble = NULL;
+ HD(j)->cp_stat[i] = FREE;
+ printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n",
+ BN(j), i, SCarg->pid);
+ SCarg->scsi_done(SCarg);
+ return SCSI_ABORT_SUCCESS;
+ }
+
+ panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i);
+}
+
+int eata2x_old_abort(Scsi_Cmnd *SCarg) {
+ int rtn;
+ IRQ_FLAGS
+
+ IRQ_LOCK_SAVE
+ rtn = do_old_abort(SCarg);
+ IRQ_UNLOCK_RESTORE
+ return rtn;
+}
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101)
+
+static inline int do_abort(Scsi_Cmnd *SCarg) {
+ unsigned int i, j;
+
+ j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
+
+ if (SCarg->host_scribble == NULL) {
+ printk("%s: abort, target %d.%d:%d, pid %ld inactive.\n",
+ BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid);
+ return SUCCESS;
+ }
+
+ i = *(unsigned int *)SCarg->host_scribble;
+ printk("%s: abort, mbox %d, target %d.%d:%d, pid %ld.\n",
+ BN(j), i, SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid);
+
+ if (i >= sh[j]->can_queue)
+ panic("%s: abort, invalid SCarg->host_scribble.\n", BN(j));
+
+ if (wait_on_busy(sh[j]->io_port, MAXLOOP)) {
+ printk("%s: abort, timeout error.\n", BN(j));
+ return FAILED;
+ }
+
+ if (HD(j)->cp_stat[i] == FREE) {
+ printk("%s: abort, mbox %d is free.\n", BN(j), i);
+ return SUCCESS;
+ }
+
+ if (HD(j)->cp_stat[i] == IN_USE) {
+ printk("%s: abort, mbox %d is in use.\n", BN(j), i);
+
+ if (SCarg != HD(j)->cp[i].SCpnt)
+ panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
+ BN(j), i, SCarg, HD(j)->cp[i].SCpnt);
+
+ if (inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
+ printk("%s: abort, mbox %d, interrupt pending.\n", BN(j), i);
+
+ if (SCarg->eh_state == SCSI_STATE_TIMEOUT) {
+ SCarg->host_scribble = NULL;
+ HD(j)->cp_stat[i] = FREE;
+ printk("%s, abort, mbox %d, eh_state timeout, pid %ld.\n",
+ BN(j), i, SCarg->pid);
+ return SUCCESS;
+ }
+
+ return FAILED;
+ }
+
+ if (HD(j)->cp_stat[i] == IN_RESET) {
+ printk("%s: abort, mbox %d is in reset.\n", BN(j), i);
+ return FAILED;
+ }
+
+ if (HD(j)->cp_stat[i] == LOCKED) {
+ printk("%s: abort, mbox %d is locked.\n", BN(j), i);
+ return SUCCESS;
+ }
+
+ if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) {
+ SCarg->result = DID_ABORT << 16;
+ SCarg->host_scribble = NULL;
+ HD(j)->cp_stat[i] = FREE;
+ printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n",
+ BN(j), i, SCarg->pid);
+ SCarg->scsi_done(SCarg);
+ return SUCCESS;
+ }
+
+ panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i);
+}
+
+int eata2x_abort(Scsi_Cmnd *SCarg) {
+
+ return do_abort(SCarg);
+}
+
+#endif /* new_eh_code */
+
+static inline int do_old_reset(Scsi_Cmnd *SCarg) {
+ unsigned int i, j, time, k, c, limit = 0;
+ int arg_done = FALSE;
+ Scsi_Cmnd *SCpnt;
+
+ j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
+ printk("%s: reset, enter, target %d.%d:%d, pid %ld.\n",
+ BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid);
+
+ if (SCarg->host_scribble == NULL)
+ printk("%s: reset, pid %ld inactive.\n", BN(j), SCarg->pid);
+
+ if (SCarg->serial_number_at_timeout &&
+ (SCarg->serial_number != SCarg->serial_number_at_timeout)) {
+ printk("%s: reset, pid %ld, reset not running.\n", BN(j), SCarg->pid);
+ return SCSI_RESET_NOT_RUNNING;
+ }
+
+ if (HD(j)->in_reset) {
+ printk("%s: reset, exit, already in reset.\n", BN(j));
+ return SCSI_RESET_ERROR;
+ }
+
+ if (wait_on_busy(sh[j]->io_port, MAXLOOP)) {
+ printk("%s: reset, exit, timeout error.\n", BN(j));
+ return SCSI_RESET_ERROR;
+ }
+
+ HD(j)->retries = 0;
+
+ for (c = 0; c <= sh[j]->max_channel; c++)
+ for (k = 0; k < sh[j]->max_id; k++) {
+ HD(j)->target_redo[k][c] = TRUE;
+ HD(j)->target_to[k][c] = 0;
+ }
+
+ for (i = 0; i < sh[j]->can_queue; i++) {
+
+ if (HD(j)->cp_stat[i] == FREE) continue;
+
+ if (HD(j)->cp_stat[i] == LOCKED) {
+ HD(j)->cp_stat[i] = FREE;
+ printk("%s: reset, locked mbox %d forced free.\n", BN(j), i);
+ continue;
+ }
+
+ if (!(SCpnt = HD(j)->cp[i].SCpnt))
+ panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i);
+
+ if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) {
+ HD(j)->cp_stat[i] = ABORTING;
+ printk("%s: reset, mbox %d aborting, pid %ld.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else {
+ HD(j)->cp_stat[i] = IN_RESET;
+ printk("%s: reset, mbox %d in reset, pid %ld.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ if (SCpnt->host_scribble == NULL)
+ panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i);
+
+ if (*(unsigned int *)SCpnt->host_scribble != i)
+ panic("%s: reset, mbox %d, index mismatch.\n", BN(j), i);
+
+ if (SCpnt->scsi_done == NULL)
+ panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", BN(j), i);
+
+ if (SCpnt == SCarg) arg_done = TRUE;
+ }
+
+ if (do_dma(sh[j]->io_port, 0, RESET_PIO)) {
+ printk("%s: reset, cannot reset, timeout error.\n", BN(j));
+ return SCSI_RESET_ERROR;
+ }
+
+ printk("%s: reset, board reset done, enabling interrupts.\n", BN(j));
+
+#if defined(DEBUG_RESET)
+ do_trace = TRUE;
+#endif
+
+ HD(j)->in_reset = TRUE;
+ SPIN_UNLOCK
+ IRQ_UNLOCK
+ time = jiffies;
+ while ((jiffies - time) < (10 * HZ) && limit++ < 200000) udelay(100L);
+ IRQ_LOCK
+ SPIN_LOCK
+ printk("%s: reset, interrupts disabled, loops %d.\n", BN(j), limit);
+
+ for (i = 0; i < sh[j]->can_queue; i++) {
+
+ if (HD(j)->cp_stat[i] == IN_RESET) {
+ SCpnt = HD(j)->cp[i].SCpnt;
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
+
+ /* This mailbox is still waiting for its interrupt */
+ HD(j)->cp_stat[i] = LOCKED;
+
+ printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else if (HD(j)->cp_stat[i] == ABORTING) {
+ SCpnt = HD(j)->cp[i].SCpnt;
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
+
+ /* This mailbox was never queued to the adapter */
+ HD(j)->cp_stat[i] = FREE;
+
+ printk("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else
+
+ /* Any other mailbox has already been set free by interrupt */
+ continue;
+
+ SCpnt->scsi_done(SCpnt);
+ IRQ_LOCK
+ }
+
+ HD(j)->in_reset = FALSE;
+ do_trace = FALSE;
+
+ if (arg_done) {
+ printk("%s: reset, exit, success.\n", BN(j));
+ return SCSI_RESET_SUCCESS;
+ }
+ else {
+ printk("%s: reset, exit, wakeup.\n", BN(j));
+ return SCSI_RESET_PUNT;
+ }
+}
+
+int eata2x_old_reset(Scsi_Cmnd *SCarg, unsigned int reset_flags) {
+ int rtn;
+ IRQ_FLAGS
+
+ IRQ_LOCK_SAVE
+ rtn = do_old_reset(SCarg);
+ IRQ_UNLOCK_RESTORE
+ return rtn;
+}
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101)
+
+static inline int do_reset(Scsi_Cmnd *SCarg) {
+ unsigned int i, j, time, k, c, limit = 0;
+ int arg_done = FALSE;
+ Scsi_Cmnd *SCpnt;
+
+ j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
+ printk("%s: reset, enter, target %d.%d:%d, pid %ld.\n",
+ BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid);
+
+ if (SCarg->host_scribble == NULL)
+ printk("%s: reset, pid %ld inactive.\n", BN(j), SCarg->pid);
+
+ if (HD(j)->in_reset) {
+ printk("%s: reset, exit, already in reset.\n", BN(j));
+ return FAILED;
+ }
+
+ if (wait_on_busy(sh[j]->io_port, MAXLOOP)) {
+ printk("%s: reset, exit, timeout error.\n", BN(j));
+ return FAILED;
+ }
+
+ HD(j)->retries = 0;
+
+ for (c = 0; c <= sh[j]->max_channel; c++)
+ for (k = 0; k < sh[j]->max_id; k++) {
+ HD(j)->target_redo[k][c] = TRUE;
+ HD(j)->target_to[k][c] = 0;
+ }
+
+ for (i = 0; i < sh[j]->can_queue; i++) {
+
+ if (HD(j)->cp_stat[i] == FREE) continue;
+
+ if (HD(j)->cp_stat[i] == LOCKED) {
+ HD(j)->cp_stat[i] = FREE;
+ printk("%s: reset, locked mbox %d forced free.\n", BN(j), i);
+ continue;
+ }
+
+ if (!(SCpnt = HD(j)->cp[i].SCpnt))
+ panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i);
+
+ if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) {
+ HD(j)->cp_stat[i] = ABORTING;
+ printk("%s: reset, mbox %d aborting, pid %ld.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else {
+ HD(j)->cp_stat[i] = IN_RESET;
+ printk("%s: reset, mbox %d in reset, pid %ld.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ if (SCpnt->host_scribble == NULL)
+ panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i);
+
+ if (*(unsigned int *)SCpnt->host_scribble != i)
+ panic("%s: reset, mbox %d, index mismatch.\n", BN(j), i);
+
+ if (SCpnt->scsi_done == NULL)
+ panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", BN(j), i);
+
+ if (SCpnt == SCarg) arg_done = TRUE;
+ }
+
+ if (do_dma(sh[j]->io_port, 0, RESET_PIO)) {
+ printk("%s: reset, cannot reset, timeout error.\n", BN(j));
+ return FAILED;
+ }
+
+ printk("%s: reset, board reset done, enabling interrupts.\n", BN(j));
+
+#if defined(DEBUG_RESET)
+ do_trace = TRUE;
+#endif
+
+ HD(j)->in_reset = TRUE;
+ SPIN_UNLOCK
+ IRQ_UNLOCK
+ time = jiffies;
+ while ((jiffies - time) < (10 * HZ) && limit++ < 200000) udelay(100L);
+ IRQ_LOCK
+ SPIN_LOCK
+ printk("%s: reset, interrupts disabled, loops %d.\n", BN(j), limit);
+
+ for (i = 0; i < sh[j]->can_queue; i++) {
+
+ if (HD(j)->cp_stat[i] == IN_RESET) {
+ SCpnt = HD(j)->cp[i].SCpnt;
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
+
+ /* This mailbox is still waiting for its interrupt */
+ HD(j)->cp_stat[i] = LOCKED;
+
+ printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else if (HD(j)->cp_stat[i] == ABORTING) {
+ SCpnt = HD(j)->cp[i].SCpnt;
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
+
+ /* This mailbox was never queued to the adapter */
+ HD(j)->cp_stat[i] = FREE;
+
+ printk("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n",
+ BN(j), i, SCpnt->pid);
+ }
+
+ else
+
+ /* Any other mailbox has already been set free by interrupt */
+ continue;
+
+ SCpnt->scsi_done(SCpnt);
+ IRQ_LOCK
+ }
+
+ HD(j)->in_reset = FALSE;
+ do_trace = FALSE;
+
+ if (arg_done) printk("%s: reset, exit, pid %ld done.\n", BN(j), SCarg->pid);
+ else printk("%s: reset, exit.\n", BN(j));
+
+ return SUCCESS;
+}
+
+int eata2x_reset(Scsi_Cmnd *SCarg) {
+
+ return do_reset(SCarg);
+}
+
+#endif /* new_eh_code */
+
+int eata2x_biosparam(Disk *disk, kdev_t dev, int *dkinfo) {
+ int size = disk->capacity;
+
+ if (ext_tran || (scsicam_bios_param(disk, dev, dkinfo) < 0)) {
+ dkinfo[0] = 255;
+ dkinfo[1] = 63;
+ dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
+ }
+
+#if defined (DEBUG_GEOMETRY)
+ printk ("%s: biosparam, head=%d, sec=%d, cyl=%d.\n", driver_name,
+ dkinfo[0], dkinfo[1], dkinfo[2]);
+#endif
+
+ return FALSE;
+}
+
+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 inline int reorder(unsigned int j, unsigned long cursec,
+ unsigned int ihdlr, unsigned int il[], unsigned int n_ready) {
+ Scsi_Cmnd *SCpnt;
+ struct mscp *cpp;
+ unsigned int k, n;
+ unsigned int rev = FALSE, s = TRUE, r = TRUE;
+ unsigned int input_only = TRUE, overlap = FALSE;
+ 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 FALSE;
+
+ for (n = 0; n < n_ready; n++) {
+ k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt;
+
+ if (!cpp->din) input_only = FALSE;
+
+ if (SCpnt->request.sector < minsec) minsec = SCpnt->request.sector;
+ if (SCpnt->request.sector > maxsec) maxsec = SCpnt->request.sector;
+
+ sl[n] = SCpnt->request.sector;
+ ioseek += SCpnt->request.nr_sectors;
+
+ if (!n) continue;
+
+ if (sl[n] < sl[n - 1]) s = FALSE;
+ if (sl[n] > sl[n - 1]) r = FALSE;
+
+ 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 = TRUE;
+
+ if (ioseek > ((maxsec - minsec) / 2)) rev = FALSE;
+
+ 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 = &HD(j)->cp[k]; SCpnt = cpp->SCpnt;
+ ll[n] = SCpnt->request.nr_sectors; pl[n] = SCpnt->pid;
+
+ 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 = TRUE;
+ }
+
+ if (overlap) sort(pl, il, n_ready, FALSE);
+
+ 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 = &HD(j)->cp[k]; SCpnt = cpp->SCpnt;
+ printk("%s %d.%d:%d pid %ld mb %d fc %d nr %d sec %ld ns %ld"\
+ " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
+ (ihdlr ? "ihdlr" : "qcomm"), SCpnt->channel, SCpnt->target,
+ SCpnt->lun, SCpnt->pid, k, flushcount, n_ready,
+ SCpnt->request.sector, SCpnt->request.nr_sectors, cursec,
+ YESNO(s), YESNO(r), YESNO(rev), YESNO(input_only),
+ YESNO(overlap), cpp->din);
+ }
+#endif
+ return overlap;
+}
+
+static void flush_dev(Scsi_Device *dev, unsigned long cursec, unsigned int j,
+ unsigned int ihdlr) {
+ Scsi_Cmnd *SCpnt;
+ struct mscp *cpp;
+ unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
+
+ for (k = 0; k < sh[j]->can_queue; k++) {
+
+ if (HD(j)->cp_stat[k] != READY && HD(j)->cp_stat[k] != IN_USE) continue;
+
+ cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt;
+
+ if (SCpnt->device != dev) continue;
+
+ if (HD(j)->cp_stat[k] == IN_USE) return;
+
+ il[n_ready++] = k;
+ }
+
+ if (reorder(j, cursec, ihdlr, il, n_ready)) n_ready = 1;
+
+ for (n = 0; n < n_ready; n++) {
+ k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt;
+
+ if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) {
+ printk("%s: %s, target %d.%d:%d, pid %ld, mbox %d, adapter"\
+ " busy, will abort.\n", BN(j), (ihdlr ? "ihdlr" : "qcomm"),
+ SCpnt->channel, SCpnt->target, SCpnt->lun, SCpnt->pid, k);
+ HD(j)->cp_stat[k] = ABORTING;
+ continue;
+ }
+
+ HD(j)->cp_stat[k] = IN_USE;
+ }
+
+}
+
+static inline void ihdlr(int irq, unsigned int j) {
+ Scsi_Cmnd *SCpnt;
+ unsigned int i, k, c, status, tstatus, reg;
+ struct mssp *dspp, *spp;
+ struct mscp *cpp;
+
+ if (sh[j]->irq != irq)
+ panic("%s: ihdlr, irq %d, sh[j]->irq %d.\n", BN(j), irq, sh[j]->irq);
+
+ /* Check if this board need to be serviced */
+ if (!(inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)) return;
+
+ HD(j)->iocount++;
+
+ if (do_trace) printk("%s: ihdlr, enter, irq %d, count %d.\n", BN(j), irq,
+ HD(j)->iocount);
+
+ /* Check if this board is still busy */
+ if (wait_on_busy(sh[j]->io_port, 20 * MAXLOOP)) {
+ reg = inb(sh[j]->io_port + REG_STATUS);
+ printk("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n",
+ BN(j), irq, reg, HD(j)->iocount);
+ return;
+ }
+
+ dspp = &HD(j)->sp[0];
+ spp = &HD(j)->sp[1];
+
+ /* Make a local copy just before clearing the interrupt indication */
+ memcpy(spp, dspp, sizeof(struct mssp));
+
+ /* Clear the completion flag and cp pointer on the dynamic copy of sp */
+ memset(dspp, 0, sizeof(struct mssp));
+
+ /* Read the status register to clear the interrupt indication */
+ reg = inb(sh[j]->io_port + REG_STATUS);
+
+ /* Reject any sp with supspect data */
+ if (spp->eoc == FALSE)
+ printk("%s: ihdlr, spp->eoc == FALSE, irq %d, reg 0x%x, count %d.\n",
+ BN(j), irq, reg, HD(j)->iocount);
+ if (spp->cpp == NULL)
+ printk("%s: ihdlr, spp->cpp == NULL, irq %d, reg 0x%x, count %d.\n",
+ BN(j), irq, reg, HD(j)->iocount);
+ if (spp->eoc == FALSE || spp->cpp == NULL) return;
+
+ cpp = spp->cpp;
+
+#if defined(DEBUG_GENERATE_ABORTS)
+ if ((HD(j)->iocount > 500) && ((HD(j)->iocount % 500) < 3)) return;
+#endif
+
+ /* Find the mailbox to be serviced on this board */
+ i = cpp - HD(j)->cp;
+
+ if (cpp < HD(j)->cp || cpp >= HD(j)->cp + sh[j]->can_queue
+ || i >= sh[j]->can_queue)
+ panic("%s: ihdlr, invalid mscp bus address %p, cp0 %p.\n", BN(j),
+ cpp, HD(j)->cp);
+
+ if (HD(j)->cp_stat[i] == IGNORE) {
+ HD(j)->cp_stat[i] = FREE;
+ return;
+ }
+ else if (HD(j)->cp_stat[i] == LOCKED) {
+ HD(j)->cp_stat[i] = FREE;
+ printk("%s: ihdlr, mbox %d unlocked, count %d.\n", BN(j), i,
+ HD(j)->iocount);
+ return;
+ }
+ else if (HD(j)->cp_stat[i] == FREE) {
+ printk("%s: ihdlr, mbox %d is free, count %d.\n", BN(j), i,
+ HD(j)->iocount);
+ return;
+ }
+ else if (HD(j)->cp_stat[i] == IN_RESET)
+ printk("%s: ihdlr, mbox %d is in reset.\n", BN(j), i);
+ else if (HD(j)->cp_stat[i] != IN_USE)
+ panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
+ BN(j), i, HD(j)->cp_stat[i]);
+
+ HD(j)->cp_stat[i] = FREE;
+ SCpnt = cpp->SCpnt;
+
+ if (SCpnt == NULL) panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", BN(j), i);
+
+ if (SCpnt->host_scribble == NULL)
+ panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n", BN(j), i,
+ SCpnt->pid, SCpnt);
+
+ if (*(unsigned int *)SCpnt->host_scribble != i)
+ panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d.\n",
+ BN(j), i, SCpnt->pid, *(unsigned int *)SCpnt->host_scribble);
+
+ if (linked_comm && SCpnt->device->queue_depth > 2
+ && TLDEV(SCpnt->device->type))
+ flush_dev(SCpnt->device, SCpnt->request.sector, j, TRUE);
+
+ tstatus = status_byte(spp->target_status);
+
+#if defined(DEBUG_GENERATE_ERRORS)
+ if ((HD(j)->iocount > 500) && ((HD(j)->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
+ && HD(j)->target_redo[SCpnt->target][SCpnt->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)
+ HD(j)->target_redo[SCpnt->target][SCpnt->channel] = FALSE;
+
+ if (spp->target_status && SCpnt->device->type == TYPE_DISK)
+ printk("%s: ihdlr, target %d.%d:%d, pid %ld, "\
+ "target_status 0x%x, sense key 0x%x.\n", BN(j),
+ SCpnt->channel, SCpnt->target, SCpnt->lun,
+ SCpnt->pid, spp->target_status,
+ SCpnt->sense_buffer[2]);
+
+ HD(j)->target_to[SCpnt->target][SCpnt->channel] = 0;
+
+ if (HD(j)->last_retried_pid == SCpnt->pid) HD(j)->retries = 0;
+
+ break;
+ case ASST: /* Selection Time Out */
+ case 0x02: /* Command Time Out */
+
+ if (HD(j)->target_to[SCpnt->target][SCpnt->channel] > 1)
+ status = DID_ERROR << 16;
+ else {
+ status = DID_TIME_OUT << 16;
+ HD(j)->target_to[SCpnt->target][SCpnt->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 <= sh[j]->max_channel; c++)
+ for (k = 0; k < sh[j]->max_id; k++)
+ HD(j)->target_redo[k][c] = TRUE;
+
+ if (SCpnt->device->type != TYPE_TAPE
+ && HD(j)->retries < MAX_INTERNAL_RETRIES) {
+
+#if defined(DID_SOFT_ERROR)
+ status = DID_SOFT_ERROR << 16;
+#else
+ status = DID_BUS_BUSY << 16;
+#endif
+ HD(j)->retries++;
+ HD(j)->last_retried_pid = SCpnt->pid;
+ }
+ 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 && HD(j)->iocount > 1000) ||
+ (spp->adapter_status != ASOK &&
+ spp->adapter_status != ASST && HD(j)->iocount <= 1000) ||
+ do_trace || msg_byte(spp->target_status))
+#endif
+ printk("%s: ihdlr, mbox %2d, err 0x%x:%x,"\
+ " target %d.%d:%d, pid %ld, reg 0x%x, count %d.\n",
+ BN(j), i, spp->adapter_status, spp->target_status,
+ SCpnt->channel, SCpnt->target, SCpnt->lun, SCpnt->pid,
+ reg, HD(j)->iocount);
+
+ /* 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", BN(j), irq,
+ HD(j)->iocount);
+
+ return;
+}
+
+static void do_interrupt_handler(int irq, void *shap, struct pt_regs *regs) {
+ unsigned int j;
+ IRQ_FLAGS
+ SPIN_FLAGS
+
+ /* Check if the interrupt must be processed by this handler */
+ if ((j = (unsigned int)((char *)shap - sha)) >= num_boards) return;
+
+ SPIN_LOCK_SAVE
+ IRQ_LOCK_SAVE
+ ihdlr(irq, j);
+ IRQ_UNLOCK_RESTORE
+ SPIN_UNLOCK_RESTORE
+}
+
+int eata2x_release(struct Scsi_Host *shpnt) {
+ unsigned int i, j;
+ IRQ_FLAGS
+
+ IRQ_LOCK_SAVE
+
+ for (j = 0; sh[j] != NULL && sh[j] != shpnt; j++);
+
+ if (sh[j] == NULL) panic("%s: release, invalid Scsi_Host pointer.\n",
+ driver_name);
+
+ for (i = 0; i < sh[j]->can_queue; i++)
+ if ((&HD(j)->cp[i])->sglist) kfree((&HD(j)->cp[i])->sglist);
+
+ free_irq(sh[j]->irq, &sha[j]);
+
+ if (sh[j]->dma_channel != NO_DMA) free_dma(sh[j]->dma_channel);
+
+ release_region(sh[j]->io_port, sh[j]->n_io_port);
+ scsi_unregister(sh[j]);
+ IRQ_UNLOCK_RESTORE
+ return FALSE;
+}
+
+#if defined(MODULE)
+Scsi_Host_Template driver_template = EATA;
+
+#include "scsi_module.c"
+#endif