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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/eata.c
Linux-2.6.12-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!
Diffstat (limited to 'drivers/scsi/eata.c')
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diff --git a/drivers/scsi/eata.c b/drivers/scsi/eata.c
new file mode 100644
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+/*
+ * eata.c - Low-level driver for EATA/DMA SCSI host adapters.
+ *
+ * 03 Jun 2003 Rev. 8.10 for linux-2.5.70
+ * + Update for new IRQ API.
+ * + Use "goto" when appropriate.
+ * + Drop eata.h.
+ * + Update for new module_param API.
+ * + Module parameters can now be specified only in the
+ * same format as the kernel boot options.
+ *
+ * boot option old module param
+ * ----------- ------------------
+ * addr,... io_port=addr,...
+ * lc:[y|n] linked_comm=[1|0]
+ * mq:xx max_queue_depth=xx
+ * tm:[0|1|2] tag_mode=[0|1|2]
+ * et:[y|n] ext_tran=[1|0]
+ * rs:[y|n] rev_scan=[1|0]
+ * ip:[y|n] isa_probe=[1|0]
+ * ep:[y|n] eisa_probe=[1|0]
+ * pp:[y|n] pci_probe=[1|0]
+ *
+ * A valid example using the new parameter format is:
+ * modprobe eata "eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n"
+ *
+ * which is equivalent to the old format:
+ * modprobe eata io_port=0x7410,0x230 linked_comm=1 tag_mode=0 \
+ * max_queue_depth=4 eisa_probe=0
+ *
+ * 12 Feb 2003 Rev. 8.04 for linux 2.5.60
+ * + Release irq before calling scsi_register.
+ *
+ * 12 Nov 2002 Rev. 8.02 for linux 2.5.47
+ * + Release driver_lock before calling scsi_register.
+ *
+ * 11 Nov 2002 Rev. 8.01 for linux 2.5.47
+ * + Fixed bios_param and scsicam_bios_param calling parameters.
+ *
+ * 28 Oct 2002 Rev. 8.00 for linux 2.5.44-ac4
+ * + Use new tcq and adjust_queue_depth api.
+ * + New command line option (tm:[0-2]) to choose the type of tags:
+ * 0 -> disable tagging ; 1 -> simple tags ; 2 -> ordered tags.
+ * Default is tm:0 (tagged commands disabled).
+ * For compatibility the "tc:" option is an alias of the "tm:"
+ * option; tc:n is equivalent to tm:0 and tc:y is equivalent to
+ * tm:1.
+ * + The tagged_comm module parameter has been removed, use tag_mode
+ * instead, equivalent to the "tm:" boot option.
+ *
+ * 10 Oct 2002 Rev. 7.70 for linux 2.5.42
+ * + Foreport from revision 6.70.
+ *
+ * 25 Jun 2002 Rev. 6.70 for linux 2.4.19
+ * + This release is the first one tested on a Big Endian platform:
+ * fixed endian-ness problem due to bitfields;
+ * fixed endian-ness problem in read_pio.
+ * + Added new options for selectively probing ISA, EISA and PCI bus:
+ *
+ * Boot option Parameter name Default according to
+ *
+ * ip:[y|n] isa_probe=[1|0] CONFIG_ISA defined
+ * ep:[y|n] eisa_probe=[1|0] CONFIG_EISA defined
+ * pp:[y|n] pci_probe=[1|0] CONFIG_PCI defined
+ *
+ * The default action is to perform probing if the corrisponding
+ * bus is configured and to skip probing otherwise.
+ *
+ * + If pci_probe is in effect and a list of I/O ports is specified
+ * as parameter or boot option, pci_enable_device() is performed
+ * on all pci devices matching PCI_CLASS_STORAGE_SCSI.
+ *
+ * 21 Feb 2002 Rev. 6.52 for linux 2.4.18
+ * + Backport from rev. 7.22 (use io_request_lock).
+ *
+ * 20 Feb 2002 Rev. 7.22 for linux 2.5.5
+ * + Remove any reference to virt_to_bus().
+ * + Fix pio hang while detecting multiple HBAs.
+ * + Fixed a board detection bug: in a system with
+ * multiple ISA/EISA boards, all but the first one
+ * were erroneously detected as PCI.
+ *
+ * 01 Jan 2002 Rev. 7.20 for linux 2.5.1
+ * + Use the dynamic DMA mapping API.
+ *
+ * 19 Dec 2001 Rev. 7.02 for linux 2.5.1
+ * + Use SCpnt->sc_data_direction if set.
+ * + Use sglist.page instead of sglist.address.
+ *
+ * 11 Dec 2001 Rev. 7.00 for linux 2.5.1
+ * + Use host->host_lock instead of io_request_lock.
+ *
+ * 1 May 2001 Rev. 6.05 for linux 2.4.4
+ * + Clean up all pci related routines.
+ * + Fix data transfer direction for opcode SEND_CUE_SHEET (0x5d)
+ *
+ * 30 Jan 2001 Rev. 6.04 for linux 2.4.1
+ * + Call pci_resource_start after pci_enable_device.
+ *
+ * 25 Jan 2001 Rev. 6.03 for linux 2.4.0
+ * + "check_region" call replaced by "request_region".
+ *
+ * 22 Nov 2000 Rev. 6.02 for linux 2.4.0-test11
+ * + Return code checked when calling pci_enable_device.
+ * + Removed old scsi error handling support.
+ * + The obsolete boot option flag eh:n is silently ignored.
+ * + Removed error messages while a disk drive is powered up at
+ * boot time.
+ * + Improved boot messages: all tagged capable device are
+ * indicated as "tagged" or "soft-tagged" :
+ * - "soft-tagged" means that the driver is trying to do its
+ * own tagging (i.e. the tc:y option is in effect);
+ * - "tagged" means that the device supports tagged commands,
+ * but the driver lets the HBA be responsible for tagging
+ * support.
+ *
+ * 16 Sep 1999 Rev. 5.11 for linux 2.2.12 and 2.3.18
+ * + Updated to the new __setup interface for boot command line options.
+ * + When loaded as a module, accepts the new parameter boot_options
+ * which value is a string with the same format of the kernel boot
+ * command line options. A valid example is:
+ * modprobe eata 'boot_options="0x7410,0x230,lc:y,tc:n,mq:4"'
+ *
+ * 9 Sep 1999 Rev. 5.10 for linux 2.2.12 and 2.3.17
+ * + 64bit cleanup for Linux/Alpha platform support
+ * (contribution from H.J. Lu).
+ *
+ * 22 Jul 1999 Rev. 5.00 for linux 2.2.10 and 2.3.11
+ * + Removed pre-2.2 source code compatibility.
+ * + Added call to pci_set_master.
+ *
+ * 26 Jul 1998 Rev. 4.33 for linux 2.0.35 and 2.1.111
+ * + Added command line option (rs:[y|n]) to reverse the scan order
+ * of PCI boards. The default is rs:y, which reverses the BIOS order
+ * while registering PCI boards. The default value rs:y generates
+ * the same order of all previous revisions of this driver.
+ * Pls. note that "BIOS order" might have been reversed itself
+ * after the 2.1.9x PCI modifications in the linux kernel.
+ * The rs value is ignored when the explicit list of addresses
+ * is used by the "eata=port0,port1,..." command line option.
+ * + Added command line option (et:[y|n]) to force use of extended
+ * translation (255 heads, 63 sectors) as disk geometry.
+ * The default is et:n, which uses the disk geometry returned
+ * by scsicam_bios_param. The default value et:n is compatible with
+ * all previous revisions of this driver.
+ *
+ * 28 May 1998 Rev. 4.32 for linux 2.0.33 and 2.1.104
+ * Increased busy timeout from 10 msec. to 200 msec. while
+ * processing interrupts.
+ *
+ * 16 May 1998 Rev. 4.31 for linux 2.0.33 and 2.1.102
+ * Improved abort handling during the eh recovery process.
+ *
+ * 13 May 1998 Rev. 4.30 for linux 2.0.33 and 2.1.101
+ * The driver is now fully SMP safe, including the
+ * abort and reset routines.
+ * Added command line options (eh:[y|n]) to choose between
+ * new_eh_code and the old scsi code.
+ * If linux version >= 2.1.101 the default is eh:y, while the eh
+ * option is ignored for previous releases and the old scsi code
+ * is used.
+ *
+ * 18 Apr 1998 Rev. 4.20 for linux 2.0.33 and 2.1.97
+ * Reworked interrupt handler.
+ *
+ * 11 Apr 1998 rev. 4.05 for linux 2.0.33 and 2.1.95
+ * Major reliability improvement: when a batch with overlapping
+ * requests is detected, requests are queued one at a time
+ * eliminating any possible board or drive reordering.
+ *
+ * 10 Apr 1998 rev. 4.04 for linux 2.0.33 and 2.1.95
+ * Improved SMP support (if linux version >= 2.1.95).
+ *
+ * 9 Apr 1998 rev. 4.03 for linux 2.0.33 and 2.1.94
+ * Added support for new PCI code and IO-APIC remapping of irqs.
+ * Performance improvement: when sequential i/o is detected,
+ * always use direct sort instead of reverse sort.
+ *
+ * 4 Apr 1998 rev. 4.02 for linux 2.0.33 and 2.1.92
+ * io_port is now unsigned long.
+ *
+ * 17 Mar 1998 rev. 4.01 for linux 2.0.33 and 2.1.88
+ * Use new scsi error handling code (if linux version >= 2.1.88).
+ * Use new interrupt code.
+ *
+ * 12 Sep 1997 rev. 3.11 for linux 2.0.30 and 2.1.55
+ * Use of udelay inside the wait loops to avoid timeout
+ * problems with fast cpus.
+ * Removed check about useless calls to the interrupt service
+ * routine (reported on SMP systems only).
+ * At initialization time "sorted/unsorted" is displayed instead
+ * of "linked/unlinked" to reinforce the fact that "linking" is
+ * nothing but "elevator sorting" in the actual implementation.
+ *
+ * 17 May 1997 rev. 3.10 for linux 2.0.30 and 2.1.38
+ * Use of serial_number_at_timeout in abort and reset processing.
+ * Use of the __initfunc and __initdata macro in setup code.
+ * Minor cleanups in the list_statistics code.
+ * Increased controller busy timeout in order to better support
+ * slow SCSI devices.
+ *
+ * 24 Feb 1997 rev. 3.00 for linux 2.0.29 and 2.1.26
+ * When loading as a module, parameter passing is now supported
+ * both in 2.0 and in 2.1 style.
+ * Fixed data transfer direction for some SCSI opcodes.
+ * Immediate acknowledge to request sense commands.
+ * Linked commands to each disk device are now reordered by elevator
+ * sorting. Rare cases in which reordering of write requests could
+ * cause wrong results are managed.
+ * Fixed spurious timeouts caused by long simple queue tag sequences.
+ * New command line option (tm:[0-3]) to choose the type of tags:
+ * 0 -> mixed (default); 1 -> simple; 2 -> head; 3 -> ordered.
+ *
+ * 18 Jan 1997 rev. 2.60 for linux 2.1.21 and 2.0.28
+ * Added command line options to enable/disable linked commands
+ * (lc:[y|n]), tagged commands (tc:[y|n]) and to set the max queue
+ * depth (mq:xx). Default is "eata=lc:n,tc:n,mq:16".
+ * Improved command linking.
+ * Documented how to setup RAID-0 with DPT SmartRAID boards.
+ *
+ * 8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27
+ * Added linked command support.
+ * Improved detection of PCI boards using ISA base addresses.
+ *
+ * 3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27
+ * Added support for tagged commands and queue depth adjustment.
+ *
+ * 22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26
+ * When CONFIG_PCI is defined, BIOS32 is used to include in the
+ * list of i/o ports to be probed all the PCI SCSI controllers.
+ * The list of i/o ports to be probed can be overwritten by the
+ * "eata=port0,port1,...." boot command line option.
+ * Scatter/gather lists are now allocated by a number of kmalloc
+ * calls, in order to avoid the previous size limit of 64Kb.
+ *
+ * 16 Nov 1996 rev. 2.20 for linux 2.1.10 and 2.0.25
+ * Added support for EATA 2.0C, PCI, multichannel and wide SCSI.
+ *
+ * 27 Sep 1996 rev. 2.12 for linux 2.1.0
+ * Portability cleanups (virtual/bus addressing, little/big endian
+ * support).
+ *
+ * 09 Jul 1996 rev. 2.11 for linux 2.0.4
+ * Number of internal retries is now limited.
+ *
+ * 16 Apr 1996 rev. 2.10 for linux 1.3.90
+ * New argument "reset_flags" to the reset routine.
+ *
+ * 6 Jul 1995 rev. 2.01 for linux 1.3.7
+ * Update required by the new /proc/scsi support.
+ *
+ * 11 Mar 1995 rev. 2.00 for linux 1.2.0
+ * Fixed a bug which prevented media change detection for removable
+ * disk drives.
+ *
+ * 23 Feb 1995 rev. 1.18 for linux 1.1.94
+ * Added a check for scsi_register returning NULL.
+ *
+ * 11 Feb 1995 rev. 1.17 for linux 1.1.91
+ * Now DEBUG_RESET is disabled by default.
+ * Register a board even if it does not assert DMA protocol support
+ * (DPT SK2011B does not report correctly the dmasup bit).
+ *
+ * 9 Feb 1995 rev. 1.16 for linux 1.1.90
+ * Use host->wish_block instead of host->block.
+ * New list of Data Out SCSI commands.
+ *
+ * 8 Feb 1995 rev. 1.15 for linux 1.1.89
+ * Cleared target_time_out counter while performing a reset.
+ * All external symbols renamed to avoid possible name conflicts.
+ *
+ * 28 Jan 1995 rev. 1.14 for linux 1.1.86
+ * Added module support.
+ * Log and do a retry when a disk drive returns a target status
+ * different from zero on a recovered error.
+ *
+ * 24 Jan 1995 rev. 1.13 for linux 1.1.85
+ * Use optimized board configuration, with a measured performance
+ * increase in the range 10%-20% on i/o throughput.
+ *
+ * 16 Jan 1995 rev. 1.12 for linux 1.1.81
+ * Fix mscp structure comments (no functional change).
+ * Display a message if check_region detects a port address
+ * already in use.
+ *
+ * 17 Dec 1994 rev. 1.11 for linux 1.1.74
+ * Use the scsicam_bios_param routine. This allows an easy
+ * migration path from disk partition tables created using
+ * different SCSI drivers and non optimal disk geometry.
+ *
+ * 15 Dec 1994 rev. 1.10 for linux 1.1.74
+ * Added support for ISA EATA boards (DPT PM2011, DPT PM2021).
+ * The host->block flag is set for all the detected ISA boards.
+ * The detect routine no longer enforces LEVEL triggering
+ * for EISA boards, it just prints a warning message.
+ *
+ * 30 Nov 1994 rev. 1.09 for linux 1.1.68
+ * Redo i/o on target status CHECK_CONDITION for TYPE_DISK only.
+ * Added optional support for using a single board at a time.
+ *
+ * 18 Nov 1994 rev. 1.08 for linux 1.1.64
+ * Forces sg_tablesize = 64 and can_queue = 64 if these
+ * values are not correctly detected (DPT PM2012).
+ *
+ * 14 Nov 1994 rev. 1.07 for linux 1.1.63 Final BETA release.
+ * 04 Aug 1994 rev. 1.00 for linux 1.1.39 First BETA release.
+ *
+ *
+ * This driver is based on the CAM (Common Access Method Committee)
+ * EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol.
+ *
+ * Copyright (C) 1994-2003 Dario Ballabio (ballabio_dario@emc.com)
+ *
+ * Alternate email: dario.ballabio@inwind.it, dario.ballabio@tiscalinet.it
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that redistributions of source
+ * code retain the above copyright notice and this comment without
+ * modification.
+ *
+ */
+
+/*
+ *
+ * Here is a brief description of the DPT SCSI host adapters.
+ * All these boards provide an EATA/DMA compatible programming interface
+ * and are fully supported by this driver in any configuration, including
+ * multiple SCSI channels:
+ *
+ * PM2011B/9X - Entry Level ISA
+ * PM2021A/9X - High Performance ISA
+ * PM2012A Old EISA
+ * PM2012B Old EISA
+ * PM2022A/9X - Entry Level EISA
+ * PM2122A/9X - High Performance EISA
+ * PM2322A/9X - Extra High Performance EISA
+ * PM3021 - SmartRAID Adapter for ISA
+ * PM3222 - SmartRAID Adapter for EISA (PM3222W is 16-bit wide SCSI)
+ * PM3224 - SmartRAID Adapter for PCI (PM3224W is 16-bit wide SCSI)
+ * PM33340UW - SmartRAID Adapter for PCI ultra wide multichannel
+ *
+ * The above list is just an indication: as a matter of fact all DPT
+ * boards using the EATA/DMA protocol are supported by this driver,
+ * since they use exactely the same programming interface.
+ *
+ * The DPT PM2001 provides only the EATA/PIO interface and hence is not
+ * supported by this driver.
+ *
+ * This code has been tested with up to 3 Distributed Processing Technology
+ * PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) EISA controllers,
+ * in any combination of private and shared IRQ.
+ * PCI support has been tested using up to 2 DPT PM3224W (DPT SCSI BIOS
+ * v003.D0, firmware v07G.0).
+ *
+ * DPT SmartRAID boards support "Hardware Array" - a group of disk drives
+ * which are all members of the same RAID-0, RAID-1 or RAID-5 array implemented
+ * in host adapter hardware. Hardware Arrays are fully compatible with this
+ * driver, since they look to it as a single disk drive.
+ *
+ * WARNING: to create a RAID-0 "Hardware Array" you must select "Other Unix"
+ * as the current OS in the DPTMGR "Initial System Installation" menu.
+ * Otherwise RAID-0 is generated as an "Array Group" (i.e. software RAID-0),
+ * which is not supported by the actual SCSI subsystem.
+ * To get the "Array Group" functionality, the Linux MD driver must be used
+ * instead of the DPT "Array Group" feature.
+ *
+ * Multiple ISA, EISA and PCI boards can be configured in the same system.
+ * It is suggested to put all the EISA boards on the same IRQ level, all
+ * the PCI boards on another IRQ level, while ISA boards cannot share
+ * interrupts.
+ *
+ * If you configure multiple boards on the same IRQ, the interrupt must
+ * be _level_ triggered (not _edge_ triggered).
+ *
+ * This driver detects EATA boards by probes at fixed port addresses,
+ * so no BIOS32 or PCI BIOS support is required.
+ * The suggested way to detect a generic EATA PCI board is to force on it
+ * any unused EISA address, even if there are other controllers on the EISA
+ * bus, or even if you system has no EISA bus at all.
+ * Do not force any ISA address on EATA PCI boards.
+ *
+ * If PCI bios support is configured into the kernel, BIOS32 is used to
+ * include in the list of i/o ports to be probed all the PCI SCSI controllers.
+ *
+ * Due to a DPT BIOS "feature", it might not be possible to force an EISA
+ * address on more than a single DPT PCI board, so in this case you have to
+ * let the PCI BIOS assign the addresses.
+ *
+ * The sequence of detection probes is:
+ *
+ * - ISA 0x1F0;
+ * - PCI SCSI controllers (only if BIOS32 is available);
+ * - EISA/PCI 0x1C88 through 0xFC88 (corresponding to EISA slots 1 to 15);
+ * - ISA 0x170, 0x230, 0x330.
+ *
+ * The above list of detection probes can be totally replaced by the
+ * boot command line option: "eata=port0,port1,port2,...", where the
+ * port0, port1... arguments are ISA/EISA/PCI addresses to be probed.
+ * For example using "eata=0x7410,0x7450,0x230", the driver probes
+ * only the two PCI addresses 0x7410 and 0x7450 and the ISA address 0x230,
+ * in this order; "eata=0" totally disables this driver.
+ *
+ * After the optional list of detection probes, other possible command line
+ * options are:
+ *
+ * et:y force use of extended translation (255 heads, 63 sectors);
+ * et:n use disk geometry detected by scsicam_bios_param;
+ * rs:y reverse scan order while detecting PCI boards;
+ * rs:n use BIOS order while detecting PCI boards;
+ * lc:y enables linked commands;
+ * lc:n disables linked commands;
+ * tm:0 disables tagged commands (same as tc:n);
+ * tm:1 use simple queue tags (same as tc:y);
+ * tm:2 use ordered queue tags (same as tc:2);
+ * mq:xx set the max queue depth to the value xx (2 <= xx <= 32).
+ *
+ * The default value is: "eata=lc:n,mq:16,tm:0,et:n,rs:n".
+ * An example using the list of detection probes could be:
+ * "eata=0x7410,0x230,lc:y,tm:2,mq:4,et:n".
+ *
+ * When loading as a module, parameters can be specified as well.
+ * The above example would be (use 1 in place of y and 0 in place of n):
+ *
+ * modprobe eata io_port=0x7410,0x230 linked_comm=1 \
+ * max_queue_depth=4 ext_tran=0 tag_mode=2 \
+ * rev_scan=1
+ *
+ * ----------------------------------------------------------------------------
+ * In this implementation, linked commands are designed to work with any DISK
+ * or CD-ROM, since this linking has only the intent of clustering (time-wise)
+ * and reordering by elevator sorting commands directed to each device,
+ * without any relation with the actual SCSI protocol between the controller
+ * and the device.
+ * If Q is the queue depth reported at boot time for each device (also named
+ * cmds/lun) and Q > 2, whenever there is already an active command to the
+ * device all other commands to the same device (up to Q-1) are kept waiting
+ * in the elevator sorting queue. When the active command completes, the
+ * commands in this queue are sorted by sector address. The sort is chosen
+ * between increasing or decreasing by minimizing the seek distance between
+ * the sector of the commands just completed and the sector of the first
+ * command in the list to be sorted.
+ * Trivial math assures that the unsorted average seek distance when doing
+ * random seeks over S sectors is S/3.
+ * When (Q-1) requests are uniformly distributed over S sectors, the average
+ * distance between two adjacent requests is S/((Q-1) + 1), so the sorted
+ * average seek distance for (Q-1) random requests over S sectors is S/Q.
+ * The elevator sorting hence divides the seek distance by a factor Q/3.
+ * The above pure geometric remarks are valid in all cases and the
+ * driver effectively reduces the seek distance by the predicted factor
+ * when there are Q concurrent read i/o operations on the device, but this
+ * does not necessarily results in a noticeable performance improvement:
+ * your mileage may vary....
+ *
+ * Note: command reordering inside a batch of queued commands could cause
+ * wrong results only if there is at least one write request and the
+ * intersection (sector-wise) of all requests is not empty.
+ * When the driver detects a batch including overlapping requests
+ * (a really rare event) strict serial (pid) order is enforced.
+ * ----------------------------------------------------------------------------
+ * The extended translation option (et:y) is useful when using large physical
+ * disks/arrays. It could also be useful when switching between Adaptec boards
+ * and DPT boards without reformatting the disk.
+ * When a boot disk is partitioned with extended translation, in order to
+ * be able to boot it with a DPT board is could be necessary to add to
+ * lilo.conf additional commands as in the following example:
+ *
+ * fix-table
+ * disk=/dev/sda bios=0x80 sectors=63 heads=128 cylindres=546
+ *
+ * where the above geometry should be replaced with the one reported at
+ * power up by the DPT controller.
+ * ----------------------------------------------------------------------------
+ *
+ * The boards are named EATA0, EATA1,... according to the detection order.
+ *
+ * In order to support multiple ISA boards in a reliable way,
+ * the driver sets host->wish_block = 1 for all ISA boards.
+ */
+
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/proc_fs.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/stat.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ctype.h>
+#include <linux/spinlock.h>
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+
+static int eata2x_detect(struct scsi_host_template *);
+static int eata2x_release(struct Scsi_Host *);
+static int eata2x_queuecommand(struct scsi_cmnd *,
+ void (*done) (struct scsi_cmnd *));
+static int eata2x_eh_abort(struct scsi_cmnd *);
+static int eata2x_eh_host_reset(struct scsi_cmnd *);
+static int eata2x_bios_param(struct scsi_device *, struct block_device *,
+ sector_t, int *);
+static int eata2x_slave_configure(struct scsi_device *);
+
+static struct scsi_host_template driver_template = {
+ .name = "EATA/DMA 2.0x rev. 8.10.00 ",
+ .detect = eata2x_detect,
+ .release = eata2x_release,
+ .queuecommand = eata2x_queuecommand,
+ .eh_abort_handler = eata2x_eh_abort,
+ .eh_device_reset_handler = NULL,
+ .eh_bus_reset_handler = NULL,
+ .eh_host_reset_handler = eata2x_eh_host_reset,
+ .bios_param = eata2x_bios_param,
+ .slave_configure = eata2x_slave_configure,
+ .this_id = 7,
+ .unchecked_isa_dma = 1,
+ .use_clustering = ENABLE_CLUSTERING
+};
+
+#if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)
+#error "Adjust your <asm/byteorder.h> defines"
+#endif
+
+/* Subversion values */
+#define ISA 0
+#define ESA 1
+
+#undef FORCE_CONFIG
+
+#undef DEBUG_LINKED_COMMANDS
+#undef DEBUG_DETECT
+#undef DEBUG_PCI_DETECT
+#undef DEBUG_INTERRUPT
+#undef DEBUG_RESET
+#undef DEBUG_GENERATE_ERRORS
+#undef DEBUG_GENERATE_ABORTS
+#undef DEBUG_GEOMETRY
+
+#define MAX_ISA 4
+#define MAX_VESA 0
+#define MAX_EISA 15
+#define MAX_PCI 16
+#define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI)
+#define MAX_CHANNEL 4
+#define MAX_LUN 32
+#define MAX_TARGET 32
+#define MAX_MAILBOXES 64
+#define MAX_SGLIST 64
+#define MAX_LARGE_SGLIST 122
+#define MAX_INTERNAL_RETRIES 64
+#define MAX_CMD_PER_LUN 2
+#define MAX_TAGGED_CMD_PER_LUN (MAX_MAILBOXES - MAX_CMD_PER_LUN)
+
+#define SKIP ULONG_MAX
+#define FREE 0
+#define IN_USE 1
+#define LOCKED 2
+#define IN_RESET 3
+#define IGNORE 4
+#define READY 5
+#define ABORTING 6
+#define NO_DMA 0xff
+#define MAXLOOP 10000
+#define TAG_DISABLED 0
+#define TAG_SIMPLE 1
+#define TAG_ORDERED 2
+
+#define REG_CMD 7
+#define REG_STATUS 7
+#define REG_AUX_STATUS 8
+#define REG_DATA 0
+#define REG_DATA2 1
+#define REG_SEE 6
+#define REG_LOW 2
+#define REG_LM 3
+#define REG_MID 4
+#define REG_MSB 5
+#define REGION_SIZE 9UL
+#define MAX_ISA_ADDR 0x03ff
+#define MIN_EISA_ADDR 0x1c88
+#define MAX_EISA_ADDR 0xfc88
+#define BSY_ASSERTED 0x80
+#define DRQ_ASSERTED 0x08
+#define ABSY_ASSERTED 0x01
+#define IRQ_ASSERTED 0x02
+#define READ_CONFIG_PIO 0xf0
+#define SET_CONFIG_PIO 0xf1
+#define SEND_CP_PIO 0xf2
+#define RECEIVE_SP_PIO 0xf3
+#define TRUNCATE_XFR_PIO 0xf4
+#define RESET_PIO 0xf9
+#define READ_CONFIG_DMA 0xfd
+#define SET_CONFIG_DMA 0xfe
+#define SEND_CP_DMA 0xff
+#define ASOK 0x00
+#define ASST 0x01
+
+#define YESNO(a) ((a) ? 'y' : 'n')
+#define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM)
+
+/* "EATA", in Big Endian format */
+#define EATA_SIG_BE 0x45415441
+
+/* Number of valid bytes in the board config structure for EATA 2.0x */
+#define EATA_2_0A_SIZE 28
+#define EATA_2_0B_SIZE 30
+#define EATA_2_0C_SIZE 34
+
+/* Board info structure */
+struct eata_info {
+ u_int32_t data_len; /* Number of valid bytes after this field */
+ u_int32_t sign; /* ASCII "EATA" signature */
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+ unchar version : 4,
+ : 4;
+ unchar haaval : 1,
+ ata : 1,
+ drqvld : 1,
+ dmasup : 1,
+ morsup : 1,
+ trnxfr : 1,
+ tarsup : 1,
+ ocsena : 1;
+#else
+ unchar : 4, /* unused low nibble */
+ version : 4; /* EATA version, should be 0x1 */
+ unchar ocsena : 1, /* Overlap Command Support Enabled */
+ tarsup : 1, /* Target Mode Supported */
+ trnxfr : 1, /* Truncate Transfer Cmd NOT Necessary */
+ morsup : 1, /* More Supported */
+ dmasup : 1, /* DMA Supported */
+ drqvld : 1, /* DRQ Index (DRQX) is valid */
+ ata : 1, /* This is an ATA device */
+ haaval : 1; /* Host Adapter Address Valid */
+#endif
+
+ ushort cp_pad_len; /* Number of pad bytes after cp_len */
+ unchar host_addr[4]; /* Host Adapter SCSI ID for channels 3, 2, 1, 0 */
+ u_int32_t cp_len; /* Number of valid bytes in cp */
+ u_int32_t sp_len; /* Number of valid bytes in sp */
+ ushort queue_size; /* Max number of cp that can be queued */
+ ushort unused;
+ ushort scatt_size; /* Max number of entries in scatter/gather table */
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+ unchar drqx : 2,
+ second : 1,
+ irq_tr : 1,
+ irq : 4;
+ unchar sync;
+ unchar : 4,
+ res1 : 1,
+ large_sg : 1,
+ forcaddr : 1,
+ isaena : 1;
+ unchar max_chan : 3,
+ max_id : 5;
+ unchar max_lun;
+ unchar eisa : 1,
+ pci : 1,
+ idquest : 1,
+ m1 : 1,
+ : 4;
+#else
+ unchar irq : 4, /* Interrupt Request assigned to this controller */
+ irq_tr : 1, /* 0 for edge triggered, 1 for level triggered */
+ second : 1, /* 1 if this is a secondary (not primary) controller */
+ drqx : 2; /* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */
+ unchar sync; /* 1 if scsi target id 7...0 is running sync scsi */
+
+ /* Structure extension defined in EATA 2.0B */
+ unchar isaena : 1, /* ISA i/o addressing is disabled/enabled */
+ forcaddr : 1, /* Port address has been forced */
+ large_sg : 1, /* 1 if large SG lists are supported */
+ res1 : 1,
+ : 4;
+ unchar max_id : 5, /* Max SCSI target ID number */
+ max_chan : 3; /* Max SCSI channel number on this board */
+
+ /* Structure extension defined in EATA 2.0C */
+ unchar max_lun; /* Max SCSI LUN number */
+ unchar
+ : 4,
+ m1 : 1, /* This is a PCI with an M1 chip installed */
+ idquest : 1, /* RAIDNUM returned is questionable */
+ pci : 1, /* This board is PCI */
+ eisa : 1; /* This board is EISA */
+#endif
+
+ unchar raidnum; /* Uniquely identifies this HBA in a system */
+ unchar notused;
+
+ ushort ipad[247];
+};
+
+/* Board config structure */
+struct eata_config {
+ ushort len; /* Number of bytes following this field */
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+ unchar : 4,
+ tarena : 1,
+ mdpena : 1,
+ ocena : 1,
+ edis : 1;
+#else
+ unchar edis : 1, /* Disable EATA interface after config command */
+ ocena : 1, /* Overlapped Commands Enabled */
+ mdpena : 1, /* Transfer all Modified Data Pointer Messages */
+ tarena : 1, /* Target Mode Enabled for this controller */
+ : 4;
+#endif
+ unchar cpad[511];
+};
+
+/* Returned status packet structure */
+struct mssp {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ unchar eoc : 1,
+ adapter_status : 7;
+#else
+ unchar adapter_status : 7, /* State related to current command */
+ eoc : 1; /* End Of Command (1 = command completed) */
+#endif
+ unchar target_status; /* SCSI status received after data transfer */
+ unchar unused[2];
+ u_int32_t inv_res_len; /* Number of bytes not transferred */
+ u_int32_t cpp_index; /* Index of address set in cp */
+ char mess[12];
+};
+
+struct sg_list {
+ unsigned int address; /* Segment Address */
+ unsigned int num_bytes; /* Segment Length */
+};
+
+/* MailBox SCSI Command Packet */
+struct mscp {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ unchar din : 1,
+ dout : 1,
+ interp : 1,
+ : 1,
+ sg : 1,
+ reqsen :1,
+ init : 1,
+ sreset : 1;
+ unchar sense_len;
+ unchar unused[3];
+ unchar : 7,
+ fwnest : 1;
+ unchar : 5,
+ hbaci : 1,
+ iat : 1,
+ phsunit : 1;
+ unchar channel : 3,
+ target : 5;
+ unchar one : 1,
+ dispri : 1,
+ luntar : 1,
+ lun : 5;
+#else
+ unchar sreset :1, /* SCSI Bus Reset Signal should be asserted */
+ init :1, /* Re-initialize controller and self test */
+ reqsen :1, /* Transfer Request Sense Data to addr using DMA */
+ sg :1, /* Use Scatter/Gather */
+ :1,
+ interp :1, /* The controller interprets cp, not the target */
+ dout :1, /* Direction of Transfer is Out (Host to Target) */
+ din :1; /* Direction of Transfer is In (Target to Host) */
+ unchar sense_len; /* Request Sense Length */
+ unchar unused[3];
+ unchar fwnest : 1, /* Send command to a component of an Array Group */
+ : 7;
+ unchar phsunit : 1, /* Send to Target Physical Unit (bypass RAID) */
+ iat : 1, /* Inhibit Address Translation */
+ hbaci : 1, /* Inhibit HBA Caching for this command */
+ : 5;
+ unchar target : 5, /* SCSI target ID */
+ channel : 3; /* SCSI channel number */
+ unchar lun : 5, /* SCSI logical unit number */
+ luntar : 1, /* This cp is for Target (not LUN) */
+ dispri : 1, /* Disconnect Privilege granted */
+ one : 1; /* 1 */
+#endif
+
+ unchar mess[3]; /* Massage to/from Target */
+ unchar cdb[12]; /* Command Descriptor Block */
+ u_int32_t data_len; /* If sg=0 Data Length, if sg=1 sglist length */
+ u_int32_t cpp_index; /* Index of address to be returned in sp */
+ u_int32_t data_address; /* If sg=0 Data Address, if sg=1 sglist address */
+ u_int32_t sp_dma_addr; /* Address where sp is DMA'ed when cp completes */
+ u_int32_t sense_addr; /* Address where Sense Data is DMA'ed on error */
+
+ /* Additional fields begin here. */
+ struct scsi_cmnd *SCpnt;
+
+ /* All the cp structure is zero filled by queuecommand except the
+ following CP_TAIL_SIZE bytes, initialized by detect */
+ dma_addr_t cp_dma_addr; /* dma handle for this cp structure */
+ struct sg_list *sglist; /* pointer to the allocated SG list */
+};
+
+#define CP_TAIL_SIZE (sizeof(struct sglist *) + sizeof(dma_addr_t))
+
+struct hostdata {
+ struct mscp cp[MAX_MAILBOXES]; /* Mailboxes for this board */
+ unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */
+ unsigned int last_cp_used; /* Index of last mailbox used */
+ unsigned int iocount; /* Total i/o done for this board */
+ int board_number; /* Number of this board */
+ char board_name[16]; /* Name of this board */
+ int in_reset; /* True if board is doing a reset */
+ int target_to[MAX_TARGET][MAX_CHANNEL]; /* N. of timeout errors on target */
+ int target_redo[MAX_TARGET][MAX_CHANNEL]; /* If 1 redo i/o on target */
+ unsigned int retries; /* Number of internal retries */
+ unsigned long last_retried_pid; /* Pid of last retried command */
+ unsigned char subversion; /* Bus type, either ISA or EISA/PCI */
+ unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */
+ unsigned char is_pci; /* 1 is bus type is PCI */
+ struct pci_dev *pdev; /* pdev for PCI bus, NULL otherwise */
+ struct mssp *sp_cpu_addr; /* cpu addr for DMA buffer sp */
+ dma_addr_t sp_dma_addr; /* dma handle for DMA buffer sp */
+ struct mssp sp; /* Local copy of sp buffer */
+};
+
+static struct Scsi_Host *sh[MAX_BOARDS];
+static const char *driver_name = "EATA";
+static char sha[MAX_BOARDS];
+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,
+
+ /* First ISA */
+ 0x1f0,
+
+ /* Space for MAX_PCI ports possibly reported by PCI_BIOS */
+ SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
+ SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
+
+ /* MAX_EISA ports */
+ 0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
+ 0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88,
+
+ /* Other (MAX_ISA - 1) ports */
+ 0x170, 0x230, 0x330,
+
+ /* End of list */
+ 0x0
+};
+
+/* Device is Big Endian */
+#define H2DEV(x) cpu_to_be32(x)
+#define DEV2H(x) be32_to_cpu(x)
+#define H2DEV16(x) cpu_to_be16(x)
+#define DEV2H16(x) be16_to_cpu(x)
+
+/* But transfer orientation from the 16 bit data register is Little Endian */
+#define REG2H(x) le16_to_cpu(x)
+
+static irqreturn_t do_interrupt_handler(int, void *, struct pt_regs *);
+static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *,
+ unsigned int);
+static int do_trace = 0;
+static int setup_done = 0;
+static int link_statistics;
+static int ext_tran = 0;
+static int rev_scan = 1;
+
+#if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
+static int tag_mode = TAG_SIMPLE;
+#else
+static int tag_mode = TAG_DISABLED;
+#endif
+
+#if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
+static int linked_comm = 1;
+#else
+static int linked_comm = 0;
+#endif
+
+#if defined(CONFIG_SCSI_EATA_MAX_TAGS)
+static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
+#else
+static int max_queue_depth = MAX_CMD_PER_LUN;
+#endif
+
+#if defined(CONFIG_ISA)
+static int isa_probe = 1;
+#else
+static int isa_probe = 0;
+#endif
+
+#if defined(CONFIG_EISA)
+static int eisa_probe = 1;
+#else
+static int eisa_probe = 0;
+#endif
+
+#if defined(CONFIG_PCI)
+static int pci_probe = 1;
+#else
+static int pci_probe = 0;
+#endif
+
+#define MAX_INT_PARAM 10
+#define MAX_BOOT_OPTIONS_SIZE 256
+static char boot_options[MAX_BOOT_OPTIONS_SIZE];
+
+#if defined(MODULE)
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
+MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option."
+ " Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\"");
+MODULE_AUTHOR("Dario Ballabio");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("EATA/DMA SCSI Driver");
+
+#endif
+
+static int eata2x_slave_configure(struct scsi_device *dev)
+{
+ int tqd, utqd;
+ char *tag_suffix, *link_suffix;
+ struct Scsi_Host *shost = dev->host;
+ struct hostdata *ha = (struct hostdata *)shost->hostdata;
+
+ 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",
+ ha->board_name, shost->host_no, dev->channel, dev->id, dev->lun,
+ dev->queue_depth, link_suffix, tag_suffix);
+
+ return 0;
+}
+
+static int wait_on_busy(unsigned long iobase, unsigned int loop)
+{
+ while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
+ udelay(1L);
+ if (--loop == 0)
+ return 1;
+ }
+ return 0;
+}
+
+static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
+{
+ unsigned char *byaddr;
+ unsigned long devaddr;
+
+ if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
+ return 1;
+
+ if (addr) {
+ devaddr = H2DEV(addr);
+ byaddr = (unsigned char *)&devaddr;
+ outb(byaddr[3], iobase + REG_LOW);
+ outb(byaddr[2], iobase + REG_LM);
+ outb(byaddr[1], iobase + REG_MID);
+ outb(byaddr[0], iobase + REG_MSB);
+ }
+
+ outb(cmd, iobase + REG_CMD);
+ return 0;
+}
+
+static int read_pio(unsigned long iobase, ushort * start, ushort * end)
+{
+ unsigned int loop = MAXLOOP;
+ ushort *p;
+
+ for (p = start; p <= end; p++) {
+ while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) {
+ udelay(1L);
+ if (--loop == 0)
+ return 1;
+ }
+ loop = MAXLOOP;
+ *p = REG2H(inw(iobase));
+ }
+
+ return 0;
+}
+
+static struct pci_dev *get_pci_dev(unsigned long port_base)
+{
+#if defined(CONFIG_PCI)
+ unsigned int addr;
+ struct pci_dev *dev = NULL;
+
+ while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
+ addr = pci_resource_start(dev, 0);
+
+#if defined(DEBUG_PCI_DETECT)
+ printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n",
+ driver_name, dev->bus->number, dev->devfn, addr);
+#endif
+
+ /* we are in so much trouble for a pci hotplug system with this driver
+ * anyway, so doing this at least lets people unload the driver and not
+ * cause memory problems, but in general this is a bad thing to do (this
+ * driver needs to be converted to the proper PCI api someday... */
+ pci_dev_put(dev);
+ if (addr + PCI_BASE_ADDRESS_0 == port_base)
+ return dev;
+ }
+#endif /* end CONFIG_PCI */
+ return NULL;
+}
+
+static void enable_pci_ports(void)
+{
+#if defined(CONFIG_PCI)
+ struct pci_dev *dev = NULL;
+
+ while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
+#if defined(DEBUG_PCI_DETECT)
+ printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n",
+ driver_name, dev->bus->number, dev->devfn);
+#endif
+
+ if (pci_enable_device(dev))
+ printk
+ ("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n",
+ driver_name, dev->bus->number, dev->devfn);
+ }
+
+#endif /* end CONFIG_PCI */
+}
+
+static int port_detect(unsigned long port_base, unsigned int j,
+ struct scsi_host_template *tpnt)
+{
+ unsigned char irq, dma_channel, subversion, i, is_pci = 0;
+ unsigned char protocol_rev;
+ struct eata_info info;
+ char *bus_type, dma_name[16];
+ struct pci_dev *pdev;
+ /* Allowed DMA channels for ISA (0 indicates reserved) */
+ unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
+ struct Scsi_Host *shost;
+ struct hostdata *ha;
+ char name[16];
+
+ sprintf(name, "%s%d", driver_name, j);
+
+ if (!request_region(port_base, REGION_SIZE, driver_name)) {
+#if defined(DEBUG_DETECT)
+ printk("%s: address 0x%03lx in use, skipping probe.\n", name,
+ port_base);
+#endif
+ goto fail;
+ }
+
+ spin_lock_irq(&driver_lock);
+
+ if (do_dma(port_base, 0, READ_CONFIG_PIO)) {
+#if defined(DEBUG_DETECT)
+ printk("%s: detect, do_dma failed at 0x%03lx.\n", name,
+ port_base);
+#endif
+ goto freelock;
+ }
+
+ /* Read the info structure */
+ if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) {
+#if defined(DEBUG_DETECT)
+ printk("%s: detect, read_pio failed at 0x%03lx.\n", name,
+ port_base);
+#endif
+ goto freelock;
+ }
+
+ info.data_len = DEV2H(info.data_len);
+ info.sign = DEV2H(info.sign);
+ info.cp_pad_len = DEV2H16(info.cp_pad_len);
+ info.cp_len = DEV2H(info.cp_len);
+ info.sp_len = DEV2H(info.sp_len);
+ info.scatt_size = DEV2H16(info.scatt_size);
+ info.queue_size = DEV2H16(info.queue_size);
+
+ /* Check the controller "EATA" signature */
+ if (info.sign != EATA_SIG_BE) {
+#if defined(DEBUG_DETECT)
+ printk("%s: signature 0x%04x discarded.\n", name, info.sign);
+#endif
+ goto freelock;
+ }
+
+ if (info.data_len < EATA_2_0A_SIZE) {
+ printk
+ ("%s: config structure size (%d bytes) too short, detaching.\n",
+ name, info.data_len);
+ goto freelock;
+ } else if (info.data_len == EATA_2_0A_SIZE)
+ protocol_rev = 'A';
+ else if (info.data_len == EATA_2_0B_SIZE)
+ protocol_rev = 'B';
+ else
+ protocol_rev = 'C';
+
+ if (protocol_rev != 'A' && info.forcaddr) {
+ printk("%s: warning, port address has been forced.\n", name);
+ bus_type = "PCI";
+ is_pci = 1;
+ subversion = ESA;
+ } else if (port_base > MAX_EISA_ADDR
+ || (protocol_rev == 'C' && info.pci)) {
+ bus_type = "PCI";
+ is_pci = 1;
+ subversion = ESA;
+ } else if (port_base >= MIN_EISA_ADDR
+ || (protocol_rev == 'C' && info.eisa)) {
+ bus_type = "EISA";
+ subversion = ESA;
+ } else if (protocol_rev == 'C' && !info.eisa && !info.pci) {
+ bus_type = "ISA";
+ subversion = ISA;
+ } else if (port_base > MAX_ISA_ADDR) {
+ bus_type = "PCI";
+ is_pci = 1;
+ subversion = ESA;
+ } else {
+ bus_type = "ISA";
+ subversion = ISA;
+ }
+
+ if (!info.haaval || info.ata) {
+ printk
+ ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n",
+ name, port_base, bus_type, info.haaval, info.ata);
+ goto freelock;
+ }
+
+ if (info.drqvld) {
+ if (subversion == ESA)
+ printk("%s: warning, weird %s board using DMA.\n", name,
+ bus_type);
+
+ subversion = ISA;
+ dma_channel = dma_channel_table[3 - info.drqx];
+ } else {
+ if (subversion == ISA)
+ printk("%s: warning, weird %s board not using DMA.\n",
+ name, bus_type);
+
+ subversion = ESA;
+ dma_channel = NO_DMA;
+ }
+
+ if (!info.dmasup)
+ printk("%s: warning, DMA protocol support not asserted.\n",
+ name);
+
+ irq = info.irq;
+
+ if (subversion == ESA && !info.irq_tr)
+ printk
+ ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
+ name, irq);
+
+ if (is_pci) {
+ pdev = get_pci_dev(port_base);
+ if (!pdev)
+ printk
+ ("%s: warning, failed to get pci_dev structure.\n",
+ name);
+ } else
+ pdev = NULL;
+
+ if (pdev && (irq != pdev->irq)) {
+ printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq,
+ pdev->irq);
+ irq = pdev->irq;
+ }
+
+ /* Board detected, allocate its IRQ */
+ if (request_irq(irq, do_interrupt_handler,
+ 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 defined(FORCE_CONFIG)
+ {
+ struct eata_config *cf;
+ dma_addr_t cf_dma_addr;
+
+ cf = pci_alloc_consistent(pdev, sizeof(struct eata_config),
+ &cf_dma_addr);
+
+ if (!cf) {
+ printk
+ ("%s: config, pci_alloc_consistent failed, detaching.\n",
+ name);
+ goto freedma;
+ }
+
+ /* Set board configuration */
+ memset((char *)cf, 0, sizeof(struct eata_config));
+ cf->len = (ushort) H2DEV16((ushort) 510);
+ cf->ocena = 1;
+
+ if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) {
+ printk
+ ("%s: busy timeout sending configuration, detaching.\n",
+ name);
+ pci_free_consistent(pdev, sizeof(struct eata_config),
+ cf, cf_dma_addr);
+ goto freedma;
+ }
+
+ }
+#endif
+
+ spin_unlock_irq(&driver_lock);
+ sh[j] = shost = scsi_register(tpnt, sizeof(struct hostdata));
+ spin_lock_irq(&driver_lock);
+
+ if (shost == NULL) {
+ printk("%s: unable to register host, detaching.\n", name);
+ goto freedma;
+ }
+
+ shost->io_port = port_base;
+ shost->unique_id = port_base;
+ shost->n_io_port = REGION_SIZE;
+ shost->dma_channel = dma_channel;
+ shost->irq = irq;
+ shost->sg_tablesize = (ushort) info.scatt_size;
+ shost->this_id = (ushort) info.host_addr[3];
+ shost->can_queue = (ushort) info.queue_size;
+ shost->cmd_per_lun = MAX_CMD_PER_LUN;
+
+ ha = (struct hostdata *)shost->hostdata;
+
+ memset(ha, 0, sizeof(struct hostdata));
+ ha->subversion = subversion;
+ ha->protocol_rev = protocol_rev;
+ ha->is_pci = is_pci;
+ ha->pdev = pdev;
+ ha->board_number = j;
+
+ if (ha->subversion == ESA)
+ shost->unchecked_isa_dma = 0;
+ else {
+ unsigned long flags;
+ shost->unchecked_isa_dma = 1;
+
+ flags = claim_dma_lock();
+ disable_dma(dma_channel);
+ clear_dma_ff(dma_channel);
+ set_dma_mode(dma_channel, DMA_MODE_CASCADE);
+ enable_dma(dma_channel);
+ release_dma_lock(flags);
+
+ }
+
+ strcpy(ha->board_name, name);
+
+ /* DPT PM2012 does not allow to detect sg_tablesize correctly */
+ if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) {
+ printk("%s: detect, wrong n. of SG lists %d, fixed.\n",
+ ha->board_name, shost->sg_tablesize);
+ shost->sg_tablesize = MAX_SGLIST;
+ }
+
+ /* DPT PM2012 does not allow to detect can_queue correctly */
+ if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) {
+ printk("%s: detect, wrong n. of mbox %d, fixed.\n",
+ ha->board_name, shost->can_queue);
+ shost->can_queue = MAX_MAILBOXES;
+ }
+
+ if (protocol_rev != 'A') {
+ if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL)
+ shost->max_channel = info.max_chan;
+
+ if (info.max_id > 7 && info.max_id < MAX_TARGET)
+ shost->max_id = info.max_id + 1;
+
+ if (info.large_sg && shost->sg_tablesize == MAX_SGLIST)
+ shost->sg_tablesize = MAX_LARGE_SGLIST;
+ }
+
+ if (protocol_rev == 'C') {
+ if (info.max_lun > 7 && info.max_lun < MAX_LUN)
+ shost->max_lun = info.max_lun + 1;
+ }
+
+ if (dma_channel == NO_DMA)
+ sprintf(dma_name, "%s", "BMST");
+ else
+ sprintf(dma_name, "DMA %u", dma_channel);
+
+ spin_unlock_irq(&driver_lock);
+
+ for (i = 0; i < shost->can_queue; i++)
+ ha->cp[i].cp_dma_addr = pci_map_single(ha->pdev,
+ &ha->cp[i],
+ sizeof(struct mscp),
+ PCI_DMA_BIDIRECTIONAL);
+
+ for (i = 0; i < shost->can_queue; i++) {
+ size_t sz = shost->sg_tablesize *sizeof(struct sg_list);
+ unsigned int gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC;
+ ha->cp[i].sglist = kmalloc(sz, gfp_mask);
+ if (!ha->cp[i].sglist) {
+ printk
+ ("%s: kmalloc SGlist failed, mbox %d, detaching.\n",
+ ha->board_name, i);
+ goto release;
+ }
+ }
+
+ if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev,
+ sizeof(struct mssp),
+ &ha->sp_dma_addr))) {
+ printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name);
+ goto release;
+ }
+
+ if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
+ max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
+
+ if (max_queue_depth < MAX_CMD_PER_LUN)
+ max_queue_depth = MAX_CMD_PER_LUN;
+
+ if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE)
+ tag_mode = TAG_ORDERED;
+
+ if (j == 0) {
+ printk
+ ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n");
+ printk
+ ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, "
+ "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode,
+ YESNO(linked_comm), max_queue_depth, YESNO(rev_scan),
+ YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe),
+ YESNO(pci_probe));
+ }
+
+ printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
+ ha->board_name, ha->protocol_rev, bus_type,
+ (unsigned long)shost->io_port, shost->irq, dma_name,
+ shost->sg_tablesize, shost->can_queue);
+
+ if (shost->max_id > 8 || shost->max_lun > 8)
+ printk
+ ("%s: wide SCSI support enabled, max_id %u, max_lun %u.\n",
+ ha->board_name, shost->max_id, shost->max_lun);
+
+ for (i = 0; i <= shost->max_channel; i++)
+ printk("%s: SCSI channel %u enabled, host target ID %d.\n",
+ ha->board_name, i, info.host_addr[3 - i]);
+
+#if defined(DEBUG_DETECT)
+ printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, "
+ "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version,
+ info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync,
+ info.second, info.data_len, info.cp_len, info.sp_len);
+
+ if (protocol_rev == 'B' || protocol_rev == 'C')
+ printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, "
+ "large_sg %u, res1 %u.\n", name, info.isaena,
+ info.forcaddr, info.max_id, info.max_chan, info.large_sg,
+ info.res1);
+
+ if (protocol_rev == 'C')
+ printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, "
+ "raidnum %u.\n", name, info.max_lun, info.m1,
+ info.idquest, info.pci, info.eisa, info.raidnum);
+#endif
+
+ if (ha->pdev) {
+ pci_set_master(ha->pdev);
+ if (pci_set_dma_mask(ha->pdev, 0xffffffff))
+ printk("%s: warning, pci_set_dma_mask failed.\n",
+ ha->board_name);
+ }
+
+ return 1;
+
+ freedma:
+ if (subversion == ISA)
+ free_dma(dma_channel);
+ freeirq:
+ free_irq(irq, &sha[j]);
+ freelock:
+ spin_unlock_irq(&driver_lock);
+ release_region(port_base, REGION_SIZE);
+ fail:
+ return 0;
+
+ release:
+ eata2x_release(shost);
+ return 0;
+}
+
+static void internal_setup(char *str, int *ints)
+{
+ int i, argc = ints[0];
+ char *cur = str, *pc;
+
+ if (argc > 0) {
+ if (argc > MAX_INT_PARAM)
+ argc = MAX_INT_PARAM;
+
+ for (i = 0; i < argc; i++)
+ io_port[i] = ints[i + 1];
+
+ io_port[i] = 0;
+ setup_done = 1;
+ }
+
+ while (cur && (pc = strchr(cur, ':'))) {
+ int val = 0, c = *++pc;
+
+ if (c == 'n' || c == 'N')
+ val = 0;
+ else if (c == 'y' || c == 'Y')
+ val = 1;
+ else
+ val = (int)simple_strtoul(pc, NULL, 0);
+
+ if (!strncmp(cur, "lc:", 3))
+ linked_comm = val;
+ else if (!strncmp(cur, "tm:", 3))
+ tag_mode = val;
+ else if (!strncmp(cur, "tc:", 3))
+ tag_mode = val;
+ else if (!strncmp(cur, "mq:", 3))
+ max_queue_depth = val;
+ else if (!strncmp(cur, "ls:", 3))
+ link_statistics = val;
+ else if (!strncmp(cur, "et:", 3))
+ ext_tran = val;
+ else if (!strncmp(cur, "rs:", 3))
+ rev_scan = val;
+ else if (!strncmp(cur, "ip:", 3))
+ isa_probe = val;
+ else if (!strncmp(cur, "ep:", 3))
+ eisa_probe = val;
+ else if (!strncmp(cur, "pp:", 3))
+ pci_probe = val;
+
+ if ((cur = strchr(cur, ',')))
+ ++cur;
+ }
+
+ return;
+}
+
+static int option_setup(char *str)
+{
+ int ints[MAX_INT_PARAM];
+ char *cur = str;
+ int i = 1;
+
+ while (cur && isdigit(*cur) && i <= MAX_INT_PARAM) {
+ ints[i++] = simple_strtoul(cur, NULL, 0);
+
+ if ((cur = strchr(cur, ',')) != NULL)
+ cur++;
+ }
+
+ ints[0] = i - 1;
+ internal_setup(cur, ints);
+ return 1;
+}
+
+static void add_pci_ports(void)
+{
+#if defined(CONFIG_PCI)
+ unsigned int addr, k;
+ struct pci_dev *dev = NULL;
+
+ for (k = 0; k < MAX_PCI; k++) {
+
+ if (!(dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev)))
+ break;
+
+ if (pci_enable_device(dev)) {
+#if defined(DEBUG_PCI_DETECT)
+ printk
+ ("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n",
+ driver_name, dev->bus->number, dev->devfn);
+#endif
+
+ continue;
+ }
+
+ addr = pci_resource_start(dev, 0);
+
+#if defined(DEBUG_PCI_DETECT)
+ printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n",
+ driver_name, k, dev->bus->number, dev->devfn, addr);
+#endif
+
+ /* Order addresses according to rev_scan value */
+ io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
+ addr + PCI_BASE_ADDRESS_0;
+ }
+
+ pci_dev_put(dev);
+#endif /* end CONFIG_PCI */
+}
+
+static int eata2x_detect(struct scsi_host_template *tpnt)
+{
+ unsigned int j = 0, k;
+
+ tpnt->proc_name = "eata2x";
+
+ if (strlen(boot_options))
+ option_setup(boot_options);
+
+#if defined(MODULE)
+ /* io_port could have been modified when loading as a module */
+ if (io_port[0] != SKIP) {
+ setup_done = 1;
+ io_port[MAX_INT_PARAM] = 0;
+ }
+#endif
+
+ for (k = MAX_INT_PARAM; io_port[k]; k++)
+ if (io_port[k] == SKIP)
+ continue;
+ else if (io_port[k] <= MAX_ISA_ADDR) {
+ if (!isa_probe)
+ io_port[k] = SKIP;
+ } else if (io_port[k] >= MIN_EISA_ADDR
+ && io_port[k] <= MAX_EISA_ADDR) {
+ if (!eisa_probe)
+ io_port[k] = SKIP;
+ }
+
+ if (pci_probe) {
+ if (!setup_done)
+ add_pci_ports();
+ else
+ enable_pci_ports();
+ }
+
+ for (k = 0; io_port[k]; k++) {
+
+ if (io_port[k] == SKIP)
+ continue;
+
+ if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt))
+ j++;
+ }
+
+ num_boards = j;
+ return j;
+}
+
+static void map_dma(unsigned int i, struct hostdata *ha)
+{
+ unsigned int k, count, pci_dir;
+ struct scatterlist *sgpnt;
+ struct mscp *cpp;
+ struct scsi_cmnd *SCpnt;
+
+ cpp = &ha->cp[i];
+ SCpnt = cpp->SCpnt;
+ pci_dir = SCpnt->sc_data_direction;
+
+ if (SCpnt->sense_buffer)
+ cpp->sense_addr =
+ H2DEV(pci_map_single(ha->pdev, SCpnt->sense_buffer,
+ sizeof SCpnt->sense_buffer, PCI_DMA_FROMDEVICE));
+
+ cpp->sense_len = sizeof SCpnt->sense_buffer;
+
+ if (!SCpnt->use_sg) {
+
+ /* If we get here with PCI_DMA_NONE, pci_map_single triggers a BUG() */
+ if (!SCpnt->request_bufflen)
+ pci_dir = PCI_DMA_BIDIRECTIONAL;
+
+ if (SCpnt->request_buffer)
+ cpp->data_address = H2DEV(pci_map_single(ha->pdev,
+ SCpnt->
+ request_buffer,
+ SCpnt->
+ request_bufflen,
+ pci_dir));
+
+ cpp->data_len = H2DEV(SCpnt->request_bufflen);
+ return;
+ }
+
+ sgpnt = (struct scatterlist *)SCpnt->request_buffer;
+ count = pci_map_sg(ha->pdev, sgpnt, SCpnt->use_sg, pci_dir);
+
+ for (k = 0; k < count; k++) {
+ cpp->sglist[k].address = H2DEV(sg_dma_address(&sgpnt[k]));
+ cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(&sgpnt[k]));
+ }
+
+ cpp->sg = 1;
+ cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist,
+ SCpnt->use_sg *
+ sizeof(struct sg_list),
+ pci_dir));
+ cpp->data_len = H2DEV((SCpnt->use_sg * sizeof(struct sg_list)));
+}
+
+static void unmap_dma(unsigned int i, struct hostdata *ha)
+{
+ unsigned int pci_dir;
+ struct mscp *cpp;
+ struct scsi_cmnd *SCpnt;
+
+ cpp = &ha->cp[i];
+ SCpnt = cpp->SCpnt;
+ pci_dir = SCpnt->sc_data_direction;
+
+ if (DEV2H(cpp->sense_addr))
+ pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr),
+ DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
+
+ if (SCpnt->use_sg)
+ pci_unmap_sg(ha->pdev, SCpnt->request_buffer, SCpnt->use_sg,
+ pci_dir);
+
+ if (!DEV2H(cpp->data_len))
+ pci_dir = PCI_DMA_BIDIRECTIONAL;
+
+ if (DEV2H(cpp->data_address))
+ pci_unmap_single(ha->pdev, DEV2H(cpp->data_address),
+ DEV2H(cpp->data_len), pci_dir);
+}
+
+static void sync_dma(unsigned int i, struct hostdata *ha)
+{
+ unsigned int pci_dir;
+ struct mscp *cpp;
+ struct scsi_cmnd *SCpnt;
+
+ cpp = &ha->cp[i];
+ SCpnt = cpp->SCpnt;
+ pci_dir = SCpnt->sc_data_direction;
+
+ if (DEV2H(cpp->sense_addr))
+ pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr),
+ DEV2H(cpp->sense_len),
+ PCI_DMA_FROMDEVICE);
+
+ if (SCpnt->use_sg)
+ pci_dma_sync_sg_for_cpu(ha->pdev, SCpnt->request_buffer,
+ SCpnt->use_sg, pci_dir);
+
+ if (!DEV2H(cpp->data_len))
+ pci_dir = PCI_DMA_BIDIRECTIONAL;
+
+ if (DEV2H(cpp->data_address))
+ pci_dma_sync_single_for_cpu(ha->pdev,
+ DEV2H(cpp->data_address),
+ DEV2H(cpp->data_len), pci_dir);
+}
+
+static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha)
+{
+ unsigned int k;
+
+ static const unsigned char data_out_cmds[] = {
+ 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e,
+ 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40,
+ 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d
+ };
+
+ static const unsigned char data_none_cmds[] = {
+ 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e,
+ 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47,
+ 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00
+ };
+
+ struct mscp *cpp;
+ struct scsi_cmnd *SCpnt;
+
+ cpp = &ha->cp[i];
+ SCpnt = cpp->SCpnt;
+
+ if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
+ cpp->din = 1;
+ cpp->dout = 0;
+ return;
+ } else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
+ cpp->din = 0;
+ cpp->dout = 1;
+ return;
+ } else if (SCpnt->sc_data_direction == DMA_NONE) {
+ cpp->din = 0;
+ cpp->dout = 0;
+ return;
+ }
+
+ if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL)
+ panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n",
+ ha->board_name);
+
+ for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
+ if (SCpnt->cmnd[0] == data_out_cmds[k]) {
+ cpp->dout = 1;
+ break;
+ }
+
+ if ((cpp->din = !cpp->dout))
+ for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++)
+ if (SCpnt->cmnd[0] == data_none_cmds[k]) {
+ cpp->din = 0;
+ break;
+ }
+
+}
+
+static int eata2x_queuecommand(struct scsi_cmnd *SCpnt,
+ void (*done) (struct scsi_cmnd *))
+{
+ struct Scsi_Host *shost = SCpnt->device->host;
+ struct hostdata *ha = (struct hostdata *)shost->hostdata;
+ unsigned int i, k;
+ struct mscp *cpp;
+
+ if (SCpnt->host_scribble)
+ panic("%s: qcomm, pid %ld, SCpnt %p already active.\n",
+ ha->board_name, SCpnt->pid, SCpnt);
+
+ /* i is the mailbox number, look for the first free mailbox
+ starting from last_cp_used */
+ i = ha->last_cp_used + 1;
+
+ for (k = 0; k < shost->can_queue; k++, i++) {
+ if (i >= shost->can_queue)
+ i = 0;
+ if (ha->cp_stat[i] == FREE) {
+ ha->last_cp_used = i;
+ break;
+ }
+ }
+
+ if (k == shost->can_queue) {
+ printk("%s: qcomm, no free mailbox.\n", ha->board_name);
+ return 1;
+ }
+
+ /* Set pointer to control packet structure */
+ cpp = &ha->cp[i];
+
+ memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
+
+ /* Set pointer to status packet structure, Big Endian format */
+ cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr);
+
+ SCpnt->scsi_done = done;
+ cpp->cpp_index = i;
+ SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index;
+
+ if (do_trace)
+ printk("%s: qcomm, mbox %d, target %d.%d:%d, pid %ld.\n",
+ ha->board_name, i, SCpnt->device->channel, SCpnt->device->id,
+ SCpnt->device->lun, SCpnt->pid);
+
+ cpp->reqsen = 1;
+ cpp->dispri = 1;
+#if 0
+ if (SCpnt->device->type == TYPE_TAPE)
+ cpp->hbaci = 1;
+#endif
+ cpp->one = 1;
+ cpp->channel = SCpnt->device->channel;
+ cpp->target = SCpnt->device->id;
+ cpp->lun = SCpnt->device->lun;
+ cpp->SCpnt = SCpnt;
+ memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
+
+ /* Use data transfer direction SCpnt->sc_data_direction */
+ scsi_to_dev_dir(i, ha);
+
+ /* Map DMA buffers and SG list */
+ map_dma(i, ha);
+
+ if (linked_comm && SCpnt->device->queue_depth > 2
+ && TLDEV(SCpnt->device->type)) {
+ ha->cp_stat[i] = READY;
+ flush_dev(SCpnt->device, SCpnt->request->sector, ha, 0);
+ return 0;
+ }
+
+ /* Send control packet to the board */
+ if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
+ unmap_dma(i, ha);
+ SCpnt->host_scribble = NULL;
+ printk("%s: qcomm, target %d.%d:%d, pid %ld, adapter busy.\n",
+ ha->board_name, SCpnt->device->channel, SCpnt->device->id,
+ SCpnt->device->lun, SCpnt->pid);
+ return 1;
+ }
+
+ ha->cp_stat[i] = IN_USE;
+ return 0;
+}
+
+static int eata2x_eh_abort(struct scsi_cmnd *SCarg)
+{
+ struct Scsi_Host *shost = SCarg->device->host;
+ struct hostdata *ha = (struct hostdata *)shost->hostdata;
+ unsigned int i;
+
+ if (SCarg->host_scribble == NULL) {
+ printk("%s: abort, target %d.%d:%d, pid %ld inactive.\n",
+ ha->board_name, SCarg->device->channel, SCarg->device->id,
+ SCarg->device->lun, SCarg->pid);
+ return SUCCESS;
+ }
+
+ i = *(unsigned int *)SCarg->host_scribble;
+ printk("%s: abort, mbox %d, target %d.%d:%d, pid %ld.\n",
+ ha->board_name, i, SCarg->device->channel, SCarg->device->id,
+ SCarg->device->lun, SCarg->pid);
+
+ if (i >= shost->can_queue)
+ panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name);
+
+ if (wait_on_busy(shost->io_port, MAXLOOP)) {
+ printk("%s: abort, timeout error.\n", ha->board_name);
+ return FAILED;
+ }
+
+ if (ha->cp_stat[i] == FREE) {
+ printk("%s: abort, mbox %d is free.\n", ha->board_name, i);
+ return SUCCESS;
+ }
+
+ if (ha->cp_stat[i] == IN_USE) {
+ printk("%s: abort, mbox %d is in use.\n", ha->board_name, i);
+
+ if (SCarg != ha->cp[i].SCpnt)
+ panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
+ ha->board_name, i, SCarg, ha->cp[i].SCpnt);
+
+ if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
+ printk("%s: abort, mbox %d, interrupt pending.\n",
+ ha->board_name, i);
+
+ if (SCarg->eh_state == SCSI_STATE_TIMEOUT) {
+ unmap_dma(i, ha);
+ SCarg->host_scribble = NULL;
+ ha->cp_stat[i] = FREE;
+ printk
+ ("%s, abort, mbox %d, eh_state timeout, pid %ld.\n",
+ ha->board_name, i, SCarg->pid);
+ return SUCCESS;
+ }
+
+ return FAILED;
+ }
+
+ if (ha->cp_stat[i] == IN_RESET) {
+ printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i);
+ return FAILED;
+ }
+
+ if (ha->cp_stat[i] == LOCKED) {
+ printk("%s: abort, mbox %d is locked.\n", ha->board_name, i);
+ return SUCCESS;
+ }
+
+ if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
+ unmap_dma(i, ha);
+ SCarg->result = DID_ABORT << 16;
+ SCarg->host_scribble = NULL;
+ ha->cp_stat[i] = FREE;
+ printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n",
+ ha->board_name, i, SCarg->pid);
+ SCarg->scsi_done(SCarg);
+ return SUCCESS;
+ }
+
+ panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i);
+}
+
+static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg)
+{
+ unsigned int i, time, k, c, limit = 0;
+ int arg_done = 0;
+ struct scsi_cmnd *SCpnt;
+ struct Scsi_Host *shost = SCarg->device->host;
+ struct hostdata *ha = (struct hostdata *)shost->hostdata;
+
+ printk("%s: reset, enter, target %d.%d:%d, pid %ld.\n",
+ ha->board_name, SCarg->device->channel, SCarg->device->id,
+ SCarg->device->lun, SCarg->pid);
+
+ if (SCarg->host_scribble == NULL)
+ printk("%s: reset, pid %ld inactive.\n", ha->board_name, SCarg->pid);
+
+ if (ha->in_reset) {
+ printk("%s: reset, exit, already in reset.\n", ha->board_name);
+ return FAILED;
+ }
+
+ if (wait_on_busy(shost->io_port, MAXLOOP)) {
+ printk("%s: reset, exit, timeout error.\n", ha->board_name);
+ return FAILED;
+ }
+
+ ha->retries = 0;
+
+ for (c = 0; c <= shost->max_channel; c++)
+ for (k = 0; k < shost->max_id; k++) {
+ ha->target_redo[k][c] = 1;
+ ha->target_to[k][c] = 0;
+ }
+
+ for (i = 0; i < shost->can_queue; i++) {
+
+ if (ha->cp_stat[i] == FREE)
+ continue;
+
+ if (ha->cp_stat[i] == LOCKED) {
+ ha->cp_stat[i] = FREE;
+ printk("%s: reset, locked mbox %d forced free.\n",
+ ha->board_name, i);
+ continue;
+ }
+
+ if (!(SCpnt = ha->cp[i].SCpnt))
+ panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
+
+ if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
+ ha->cp_stat[i] = ABORTING;
+ printk("%s: reset, mbox %d aborting, pid %ld.\n",
+ ha->board_name, i, SCpnt->pid);
+ }
+
+ else {
+ ha->cp_stat[i] = IN_RESET;
+ printk("%s: reset, mbox %d in reset, pid %ld.\n",
+ ha->board_name, i, SCpnt->pid);
+ }
+
+ if (SCpnt->host_scribble == NULL)
+ panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i);
+
+ if (*(unsigned int *)SCpnt->host_scribble != i)
+ panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i);
+
+ if (SCpnt->scsi_done == NULL)
+ panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n",
+ ha->board_name, i);
+
+ if (SCpnt == SCarg)
+ arg_done = 1;
+ }
+
+ if (do_dma(shost->io_port, 0, RESET_PIO)) {
+ printk("%s: reset, cannot reset, timeout error.\n", ha->board_name);
+ return FAILED;
+ }
+
+ printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name);
+
+#if defined(DEBUG_RESET)
+ do_trace = 1;
+#endif
+
+ ha->in_reset = 1;
+
+ spin_unlock_irq(shost->host_lock);
+ time = jiffies;
+ while ((jiffies - time) < (10 * HZ) && limit++ < 200000)
+ udelay(100L);
+ spin_lock_irq(shost->host_lock);
+
+ printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit);
+
+ for (i = 0; i < shost->can_queue; i++) {
+
+ if (ha->cp_stat[i] == IN_RESET) {
+ SCpnt = ha->cp[i].SCpnt;
+ unmap_dma(i, ha);
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
+
+ /* This mailbox is still waiting for its interrupt */
+ ha->cp_stat[i] = LOCKED;
+
+ printk
+ ("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
+ ha->board_name, i, SCpnt->pid);
+ }
+
+ else if (ha->cp_stat[i] == ABORTING) {
+ SCpnt = ha->cp[i].SCpnt;
+ unmap_dma(i, ha);
+ SCpnt->result = DID_RESET << 16;
+ SCpnt->host_scribble = NULL;
+
+ /* This mailbox was never queued to the adapter */
+ ha->cp_stat[i] = FREE;
+
+ printk
+ ("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n",
+ ha->board_name, i, SCpnt->pid);
+ }
+
+ else
+ /* Any other mailbox has already been set free by interrupt */
+ continue;
+
+ SCpnt->scsi_done(SCpnt);
+ }
+
+ ha->in_reset = 0;
+ do_trace = 0;
+
+ if (arg_done)
+ printk("%s: reset, exit, pid %ld done.\n", ha->board_name, SCarg->pid);
+ else
+ printk("%s: reset, exit.\n", ha->board_name);
+
+ return SUCCESS;
+}
+
+int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev,
+ sector_t capacity, int *dkinfo)
+{
+ unsigned int size = capacity;
+
+ if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) {
+ dkinfo[0] = 255;
+ dkinfo[1] = 63;
+ dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
+ }
+#if defined (DEBUG_GEOMETRY)
+ printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name,
+ dkinfo[0], dkinfo[1], dkinfo[2]);
+#endif
+
+ return 0;
+}
+
+static void sort(unsigned long sk[], unsigned int da[], unsigned int n,
+ unsigned int rev)
+{
+ unsigned int i, j, k, y;
+ unsigned long x;
+
+ for (i = 0; i < n - 1; i++) {
+ k = i;
+
+ for (j = k + 1; j < n; j++)
+ if (rev) {
+ if (sk[j] > sk[k])
+ k = j;
+ } else {
+ if (sk[j] < sk[k])
+ k = j;
+ }
+
+ if (k != i) {
+ x = sk[k];
+ sk[k] = sk[i];
+ sk[i] = x;
+ y = da[k];
+ da[k] = da[i];
+ da[i] = y;
+ }
+ }
+
+ return;
+}
+
+static int reorder(struct hostdata *ha, unsigned long cursec,
+ unsigned int ihdlr, unsigned int il[], unsigned int n_ready)
+{
+ struct scsi_cmnd *SCpnt;
+ struct mscp *cpp;
+ unsigned int k, n;
+ unsigned int rev = 0, s = 1, r = 1;
+ unsigned int input_only = 1, overlap = 0;
+ unsigned long sl[n_ready], pl[n_ready], ll[n_ready];
+ unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0;
+ unsigned long ioseek = 0;
+
+ static unsigned int flushcount = 0, batchcount = 0, sortcount = 0;
+ static unsigned int readycount = 0, ovlcount = 0, inputcount = 0;
+ static unsigned int readysorted = 0, revcount = 0;
+ static unsigned long seeksorted = 0, seeknosort = 0;
+
+ if (link_statistics && !(++flushcount % link_statistics))
+ printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"
+ " av %ldK as %ldK.\n", flushcount, batchcount,
+ inputcount, ovlcount, readycount, readysorted, sortcount,
+ revcount, seeknosort / (readycount + 1),
+ seeksorted / (readycount + 1));
+
+ if (n_ready <= 1)
+ return 0;
+
+ for (n = 0; n < n_ready; n++) {
+ k = il[n];
+ cpp = &ha->cp[k];
+ SCpnt = cpp->SCpnt;
+
+ if (!cpp->din)
+ input_only = 0;
+
+ if (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 = 0;
+ if (sl[n] > sl[n - 1])
+ r = 0;
+
+ if (link_statistics) {
+ if (sl[n] > sl[n - 1])
+ seek += sl[n] - sl[n - 1];
+ else
+ seek += sl[n - 1] - sl[n];
+ }
+
+ }
+
+ if (link_statistics) {
+ if (cursec > sl[0])
+ seek += cursec - sl[0];
+ else
+ seek += sl[0] - cursec;
+ }
+
+ if (cursec > ((maxsec + minsec) / 2))
+ rev = 1;
+
+ if (ioseek > ((maxsec - minsec) / 2))
+ rev = 0;
+
+ if (!((rev && r) || (!rev && s)))
+ sort(sl, il, n_ready, rev);
+
+ if (!input_only)
+ for (n = 0; n < n_ready; n++) {
+ k = il[n];
+ cpp = &ha->cp[k];
+ SCpnt = cpp->SCpnt;
+ ll[n] = 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 = 1;
+ }
+
+ if (overlap)
+ sort(pl, il, n_ready, 0);
+
+ if (link_statistics) {
+ if (cursec > sl[0])
+ iseek = cursec - sl[0];
+ else
+ iseek = sl[0] - cursec;
+ batchcount++;
+ readycount += n_ready;
+ seeknosort += seek / 1024;
+ if (input_only)
+ inputcount++;
+ if (overlap) {
+ ovlcount++;
+ seeksorted += iseek / 1024;
+ } else
+ seeksorted += (iseek + maxsec - minsec) / 1024;
+ if (rev && !r) {
+ revcount++;
+ readysorted += n_ready;
+ }
+ if (!rev && !s) {
+ sortcount++;
+ readysorted += n_ready;
+ }
+ }
+#if defined(DEBUG_LINKED_COMMANDS)
+ if (link_statistics && (overlap || !(flushcount % link_statistics)))
+ for (n = 0; n < n_ready; n++) {
+ k = il[n];
+ cpp = &ha->cp[k];
+ SCpnt = cpp->SCpnt;
+ 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->device->channel, SCpnt->device->id,
+ SCpnt->device->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(struct scsi_device *dev, unsigned long cursec,
+ struct hostdata *ha, unsigned int ihdlr)
+{
+ struct scsi_cmnd *SCpnt;
+ struct mscp *cpp;
+ unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
+
+ for (k = 0; k < dev->host->can_queue; k++) {
+
+ if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE)
+ continue;
+
+ cpp = &ha->cp[k];
+ SCpnt = cpp->SCpnt;
+
+ if (SCpnt->device != dev)
+ continue;
+
+ if (ha->cp_stat[k] == IN_USE)
+ return;
+
+ il[n_ready++] = k;
+ }
+
+ if (reorder(ha, cursec, ihdlr, il, n_ready))
+ n_ready = 1;
+
+ for (n = 0; n < n_ready; n++) {
+ k = il[n];
+ cpp = &ha->cp[k];
+ SCpnt = cpp->SCpnt;
+
+ if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
+ printk
+ ("%s: %s, target %d.%d:%d, pid %ld, mbox %d, adapter"
+ " busy, will abort.\n", ha->board_name,
+ (ihdlr ? "ihdlr" : "qcomm"),
+ SCpnt->device->channel, SCpnt->device->id,
+ SCpnt->device->lun, SCpnt->pid, k);
+ ha->cp_stat[k] = ABORTING;
+ continue;
+ }
+
+ ha->cp_stat[k] = IN_USE;
+ }
+}
+
+static irqreturn_t ihdlr(int irq, struct Scsi_Host *shost)
+{
+ struct scsi_cmnd *SCpnt;
+ unsigned int i, k, c, status, tstatus, reg;
+ struct mssp *spp;
+ struct mscp *cpp;
+ struct hostdata *ha = (struct hostdata *)shost->hostdata;
+
+ if (shost->irq != irq)
+ panic("%s: ihdlr, irq %d, shost->irq %d.\n", ha->board_name, irq,
+ shost->irq);
+
+ /* Check if this board need to be serviced */
+ if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
+ goto none;
+
+ ha->iocount++;
+
+ if (do_trace)
+ printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq,
+ ha->iocount);
+
+ /* Check if this board is still busy */
+ if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) {
+ reg = inb(shost->io_port + REG_STATUS);
+ printk
+ ("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n",
+ ha->board_name, irq, reg, ha->iocount);
+ goto none;
+ }
+
+ spp = &ha->sp;
+
+ /* Make a local copy just before clearing the interrupt indication */
+ memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp));
+
+ /* Clear the completion flag and cp pointer on the dynamic copy of sp */
+ memset(ha->sp_cpu_addr, 0, sizeof(struct mssp));
+
+ /* Read the status register to clear the interrupt indication */
+ reg = inb(shost->io_port + REG_STATUS);
+
+#if defined (DEBUG_INTERRUPT)
+ {
+ unsigned char *bytesp;
+ int cnt;
+ bytesp = (unsigned char *)spp;
+ if (ha->iocount < 200) {
+ printk("sp[] =");
+ for (cnt = 0; cnt < 15; cnt++)
+ printk(" 0x%x", bytesp[cnt]);
+ printk("\n");
+ }
+ }
+#endif
+
+ /* Reject any sp with supspect data */
+ if (spp->eoc == 0 && ha->iocount > 1)
+ printk
+ ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n",
+ ha->board_name, irq, reg, ha->iocount);
+ if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue)
+ printk
+ ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n",
+ ha->board_name, spp->cpp_index, irq, reg, ha->iocount);
+ if (spp->eoc == 0 || spp->cpp_index < 0
+ || spp->cpp_index >= shost->can_queue)
+ goto handled;
+
+ /* Find the mailbox to be serviced on this board */
+ i = spp->cpp_index;
+
+ cpp = &(ha->cp[i]);
+
+#if defined(DEBUG_GENERATE_ABORTS)
+ if ((ha->iocount > 500) && ((ha->iocount % 500) < 3))
+ goto handled;
+#endif
+
+ if (ha->cp_stat[i] == IGNORE) {
+ ha->cp_stat[i] = FREE;
+ goto handled;
+ } else if (ha->cp_stat[i] == LOCKED) {
+ ha->cp_stat[i] = FREE;
+ printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i,
+ ha->iocount);
+ goto handled;
+ } else if (ha->cp_stat[i] == FREE) {
+ printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i,
+ ha->iocount);
+ goto handled;
+ } else if (ha->cp_stat[i] == IN_RESET)
+ printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i);
+ else if (ha->cp_stat[i] != IN_USE)
+ panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
+ ha->board_name, i, ha->cp_stat[i]);
+
+ ha->cp_stat[i] = FREE;
+ SCpnt = cpp->SCpnt;
+
+ if (SCpnt == NULL)
+ panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
+
+ if (SCpnt->host_scribble == NULL)
+ panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n", ha->board_name,
+ i, SCpnt->pid, SCpnt);
+
+ if (*(unsigned int *)SCpnt->host_scribble != i)
+ panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d.\n",
+ ha->board_name, i, SCpnt->pid,
+ *(unsigned int *)SCpnt->host_scribble);
+
+ sync_dma(i, ha);
+
+ if (linked_comm && SCpnt->device->queue_depth > 2
+ && TLDEV(SCpnt->device->type))
+ flush_dev(SCpnt->device, SCpnt->request->sector, ha, 1);
+
+ tstatus = status_byte(spp->target_status);
+
+#if defined(DEBUG_GENERATE_ERRORS)
+ if ((ha->iocount > 500) && ((ha->iocount % 200) < 2))
+ spp->adapter_status = 0x01;
+#endif
+
+ switch (spp->adapter_status) {
+ case ASOK: /* status OK */
+
+ /* Forces a reset if a disk drive keeps returning BUSY */
+ if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
+ status = DID_ERROR << 16;
+
+ /* If there was a bus reset, redo operation on each target */
+ else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK
+ && ha->target_redo[SCpnt->device->id][SCpnt->
+ device->
+ channel])
+ status = DID_BUS_BUSY << 16;
+
+ /* Works around a flaw in scsi.c */
+ else if (tstatus == CHECK_CONDITION
+ && SCpnt->device->type == TYPE_DISK
+ && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
+ status = DID_BUS_BUSY << 16;
+
+ else
+ status = DID_OK << 16;
+
+ if (tstatus == GOOD)
+ ha->target_redo[SCpnt->device->id][SCpnt->device->
+ channel] = 0;
+
+ if (spp->target_status && SCpnt->device->type == TYPE_DISK &&
+ (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 &&
+ (SCpnt->sense_buffer[2] & 0xf) == NOT_READY)))
+ printk("%s: ihdlr, target %d.%d:%d, pid %ld, "
+ "target_status 0x%x, sense key 0x%x.\n",
+ ha->board_name,
+ SCpnt->device->channel, SCpnt->device->id,
+ SCpnt->device->lun, SCpnt->pid,
+ spp->target_status, SCpnt->sense_buffer[2]);
+
+ ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0;
+
+ if (ha->last_retried_pid == SCpnt->pid)
+ ha->retries = 0;
+
+ break;
+ case ASST: /* Selection Time Out */
+ case 0x02: /* Command Time Out */
+
+ if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1)
+ status = DID_ERROR << 16;
+ else {
+ status = DID_TIME_OUT << 16;
+ ha->target_to[SCpnt->device->id][SCpnt->device->
+ channel]++;
+ }
+
+ break;
+
+ /* Perform a limited number of internal retries */
+ case 0x03: /* SCSI Bus Reset Received */
+ case 0x04: /* Initial Controller Power-up */
+
+ for (c = 0; c <= shost->max_channel; c++)
+ for (k = 0; k < shost->max_id; k++)
+ ha->target_redo[k][c] = 1;
+
+ if (SCpnt->device->type != TYPE_TAPE
+ && ha->retries < MAX_INTERNAL_RETRIES) {
+
+#if defined(DID_SOFT_ERROR)
+ status = DID_SOFT_ERROR << 16;
+#else
+ status = DID_BUS_BUSY << 16;
+#endif
+
+ ha->retries++;
+ ha->last_retried_pid = SCpnt->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 && ha->iocount > 1000) ||
+ (spp->adapter_status != ASOK &&
+ spp->adapter_status != ASST && ha->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",
+ ha->board_name, i, spp->adapter_status, spp->target_status,
+ SCpnt->device->channel, SCpnt->device->id,
+ SCpnt->device->lun, SCpnt->pid, reg, ha->iocount);
+
+ unmap_dma(i, ha);
+
+ /* Set the command state to inactive */
+ SCpnt->host_scribble = NULL;
+
+ SCpnt->scsi_done(SCpnt);
+
+ if (do_trace)
+ printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name,
+ irq, ha->iocount);
+
+ handled:
+ return IRQ_HANDLED;
+ none:
+ return IRQ_NONE;
+}
+
+static irqreturn_t do_interrupt_handler(int irq, void *shap,
+ struct pt_regs *regs)
+{
+ struct Scsi_Host *shost;
+ unsigned int j;
+ unsigned long spin_flags;
+ irqreturn_t ret;
+
+ /* Check if the interrupt must be processed by this handler */
+ if ((j = (unsigned int)((char *)shap - sha)) >= num_boards)
+ return IRQ_NONE;
+ shost = sh[j];
+
+ spin_lock_irqsave(shost->host_lock, spin_flags);
+ ret = ihdlr(irq, shost);
+ spin_unlock_irqrestore(shost->host_lock, spin_flags);
+ return ret;
+}
+
+static int eata2x_release(struct Scsi_Host *shost)
+{
+ struct hostdata *ha = (struct hostdata *)shost->hostdata;
+ unsigned int i;
+
+ for (i = 0; i < shost->can_queue; i++)
+ if ((&ha->cp[i])->sglist)
+ kfree((&ha->cp[i])->sglist);
+
+ for (i = 0; i < shost->can_queue; i++)
+ pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr,
+ sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL);
+
+ if (ha->sp_cpu_addr)
+ pci_free_consistent(ha->pdev, sizeof(struct mssp),
+ ha->sp_cpu_addr, ha->sp_dma_addr);
+
+ free_irq(shost->irq, &sha[ha->board_number]);
+
+ if (shost->dma_channel != NO_DMA)
+ free_dma(shost->dma_channel);
+
+ release_region(shost->io_port, shost->n_io_port);
+ scsi_unregister(shost);
+ return 0;
+}
+
+#include "scsi_module.c"
+
+#ifndef MODULE
+__setup("eata=", option_setup);
+#endif /* end MODULE */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 08:47:43 +0000