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linux-next/drivers/scsi/eata.c
Tejun Heo 83096ebf12 block: convert to pos and nr_sectors accessors 
With recent cleanups, there is no place where low level driver
directly manipulates request fields.  This means that the 'hard'
request fields always equal the !hard fields.  Convert all
rq->sectors, nr_sectors and current_nr_sectors references to
accessors.

While at it, drop superflous blk_rq_pos() < 0 test in swim.c.

[ Impact: use pos and nr_sectors accessors ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Mike Miller <mike.miller@hp.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Borislav Petkov <petkovbb@googlemail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Paul Clements <paul.clements@steeleye.com>
Cc: Tim Waugh <tim@cyberelk.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Dario Ballabio <ballabio_dario@emc.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: unsik Kim <donari75@gmail.com>
Cc: Laurent Vivier <Laurent@lvivier.info>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-05-11 09:50:54 +02:00

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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/string.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/stat.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>
#include <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_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 *);
static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *,
unsigned int);
static int do_trace = 0;
static int setup_done = 0;
static int link_statistics;
static int ext_tran = 0;
static int rev_scan = 1;
#if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
static int tag_mode = TAG_SIMPLE;
#else
static int tag_mode = TAG_DISABLED;
#endif
#if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
static int linked_comm = 1;
#else
static int linked_comm = 0;
#endif
#if defined(CONFIG_SCSI_EATA_MAX_TAGS)
static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
#else
static int max_queue_depth = MAX_CMD_PER_LUN;
#endif
#if defined(CONFIG_ISA)
static int isa_probe = 1;
#else
static int isa_probe = 0;
#endif
#if defined(CONFIG_EISA)
static int eisa_probe = 1;
#else
static int eisa_probe = 0;
#endif
#if defined(CONFIG_PCI)
static int pci_probe = 1;
#else
static int pci_probe = 0;
#endif
#define MAX_INT_PARAM 10
#define MAX_BOOT_OPTIONS_SIZE 256
static char boot_options[MAX_BOOT_OPTIONS_SIZE];
#if defined(MODULE)
#include <linux/module.h>
#include <linux/moduleparam.h>
module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option."
" Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\"");
MODULE_AUTHOR("Dario Ballabio");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("EATA/DMA SCSI Driver");
#endif
static int eata2x_slave_configure(struct scsi_device *dev)
{
int tqd, utqd;
char *tag_suffix, *link_suffix;
utqd = MAX_CMD_PER_LUN;
tqd = max_queue_depth;
if (TLDEV(dev->type) && dev->tagged_supported) {
if (tag_mode == TAG_SIMPLE) {
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 = "";
sdev_printk(KERN_INFO, dev,
"cmds/lun %d%s%s.\n",
dev->queue_depth, link_suffix, tag_suffix);
return 0;
}
static int wait_on_busy(unsigned long iobase, unsigned int loop)
{
while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
udelay(1L);
if (--loop == 0)
return 1;
}
return 0;
}
static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
{
unsigned char *byaddr;
unsigned long devaddr;
if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
return 1;
if (addr) {
devaddr = H2DEV(addr);
byaddr = (unsigned char *)&devaddr;
outb(byaddr[3], iobase + REG_LOW);
outb(byaddr[2], iobase + REG_LM);
outb(byaddr[1], iobase + REG_MID);
outb(byaddr[0], iobase + REG_MSB);
}
outb(cmd, iobase + REG_CMD);
return 0;
}
static int read_pio(unsigned long iobase, ushort * start, ushort * end)
{
unsigned int loop = MAXLOOP;
ushort *p;
for (p = start; p <= end; p++) {
while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) {
udelay(1L);
if (--loop == 0)
return 1;
}
loop = MAXLOOP;
*p = REG2H(inw(iobase));
}
return 0;
}
static struct pci_dev *get_pci_dev(unsigned long port_base)
{
#if defined(CONFIG_PCI)
unsigned int addr;
struct pci_dev *dev = NULL;
while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
addr = pci_resource_start(dev, 0);
#if defined(DEBUG_PCI_DETECT)
printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n",
driver_name, dev->bus->number, dev->devfn, addr);
#endif
/* we are in so much trouble for a pci hotplug system with this driver
* anyway, so doing this at least lets people unload the driver and not
* cause memory problems, but in general this is a bad thing to do (this
* driver needs to be converted to the proper PCI api someday... */
pci_dev_put(dev);
if (addr + PCI_BASE_ADDRESS_0 == port_base)
return dev;
}
#endif /* end CONFIG_PCI */
return NULL;
}
static void enable_pci_ports(void)
{
#if defined(CONFIG_PCI)
struct pci_dev *dev = NULL;
while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
#if defined(DEBUG_PCI_DETECT)
printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n",
driver_name, dev->bus->number, dev->devfn);
#endif
if (pci_enable_device(dev))
printk
("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n",
driver_name, dev->bus->number, dev->devfn);
}
#endif /* end CONFIG_PCI */
}
static int port_detect(unsigned long port_base, unsigned int j,
struct scsi_host_template *tpnt)
{
unsigned char irq, dma_channel, subversion, i, is_pci = 0;
unsigned char protocol_rev;
struct eata_info info;
char *bus_type, dma_name[16];
struct pci_dev *pdev;
/* Allowed DMA channels for ISA (0 indicates reserved) */
unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
struct Scsi_Host *shost;
struct hostdata *ha;
char name[16];
sprintf(name, "%s%d", driver_name, j);
if (!request_region(port_base, REGION_SIZE, driver_name)) {
#if defined(DEBUG_DETECT)
printk("%s: address 0x%03lx in use, skipping probe.\n", name,
port_base);
#endif
goto fail;
}
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,
IRQF_DISABLED | ((subversion == ESA) ? IRQF_SHARED : 0),
driver_name, (void *)&sha[j])) {
printk("%s: unable to allocate IRQ %u, detaching.\n", name,
irq);
goto freelock;
}
if (subversion == ISA && request_dma(dma_channel, driver_name)) {
printk("%s: unable to allocate DMA channel %u, detaching.\n",
name, dma_channel);
goto freeirq;
}
#if defined(FORCE_CONFIG)
{
struct eata_config *cf;
dma_addr_t cf_dma_addr;
cf = pci_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);
gfp_t gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC;
ha->cp[i].sglist = kmalloc(sz, gfp_mask);
if (!ha->cp[i].sglist) {
printk
("%s: kmalloc SGlist failed, mbox %d, detaching.\n",
ha->board_name, i);
goto release;
}
}
if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev,
sizeof(struct mssp),
&ha->sp_dma_addr))) {
printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name);
goto release;
}
if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
if (max_queue_depth < MAX_CMD_PER_LUN)
max_queue_depth = MAX_CMD_PER_LUN;
if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE)
tag_mode = TAG_ORDERED;
if (j == 0) {
printk
("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n");
printk
("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, "
"ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode,
YESNO(linked_comm), max_queue_depth, YESNO(rev_scan),
YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe),
YESNO(pci_probe));
}
printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
ha->board_name, ha->protocol_rev, bus_type,
(unsigned long)shost->io_port, shost->irq, dma_name,
shost->sg_tablesize, shost->can_queue);
if (shost->max_id > 8 || shost->max_lun > 8)
printk
("%s: wide SCSI support enabled, max_id %u, max_lun %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, DMA_BIT_MASK(32)))
printk("%s: warning, pci_set_dma_mask failed.\n",
ha->board_name);
}
return 1;
freedma:
if (subversion == ISA)
free_dma(dma_channel);
freeirq:
free_irq(irq, &sha[j]);
freelock:
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, pci_dir;
int count;
struct scatterlist *sg;
struct mscp *cpp;
struct scsi_cmnd *SCpnt;
cpp = &ha->cp[i];
SCpnt = cpp->SCpnt;
pci_dir = SCpnt->sc_data_direction;
if (SCpnt->sense_buffer)
cpp->sense_addr =
H2DEV(pci_map_single(ha->pdev, SCpnt->sense_buffer,
SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE));
cpp->sense_len = SCSI_SENSE_BUFFERSIZE;
if (!scsi_sg_count(SCpnt)) {
cpp->data_len = 0;
return;
}
count = pci_map_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
pci_dir);
BUG_ON(!count);
scsi_for_each_sg(SCpnt, sg, count, k) {
cpp->sglist[k].address = H2DEV(sg_dma_address(sg));
cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg));
}
cpp->sg = 1;
cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist,
scsi_sg_count(SCpnt) *
sizeof(struct sg_list),
pci_dir));
cpp->data_len = H2DEV((scsi_sg_count(SCpnt) * sizeof(struct sg_list)));
}
static void unmap_dma(unsigned int i, struct hostdata *ha)
{
unsigned int pci_dir;
struct mscp *cpp;
struct scsi_cmnd *SCpnt;
cpp = &ha->cp[i];
SCpnt = cpp->SCpnt;
pci_dir = SCpnt->sc_data_direction;
if (DEV2H(cpp->sense_addr))
pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr),
DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
if (scsi_sg_count(SCpnt))
pci_unmap_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
pci_dir);
if (!DEV2H(cpp->data_len))
pci_dir = PCI_DMA_BIDIRECTIONAL;
if (DEV2H(cpp->data_address))
pci_unmap_single(ha->pdev, DEV2H(cpp->data_address),
DEV2H(cpp->data_len), pci_dir);
}
static void sync_dma(unsigned int i, struct hostdata *ha)
{
unsigned int pci_dir;
struct mscp *cpp;
struct scsi_cmnd *SCpnt;
cpp = &ha->cp[i];
SCpnt = cpp->SCpnt;
pci_dir = SCpnt->sc_data_direction;
if (DEV2H(cpp->sense_addr))
pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr),
DEV2H(cpp->sense_len),
PCI_DMA_FROMDEVICE);
if (scsi_sg_count(SCpnt))
pci_dma_sync_sg_for_cpu(ha->pdev, scsi_sglist(SCpnt),
scsi_sg_count(SCpnt), pci_dir);
if (!DEV2H(cpp->data_len))
pci_dir = PCI_DMA_BIDIRECTIONAL;
if (DEV2H(cpp->data_address))
pci_dma_sync_single_for_cpu(ha->pdev,
DEV2H(cpp->data_address),
DEV2H(cpp->data_len), pci_dir);
}
static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha)
{
unsigned int k;
static const unsigned char data_out_cmds[] = {
0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e,
0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40,
0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d
};
static const unsigned char data_none_cmds[] = {
0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e,
0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47,
0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00
};
struct mscp *cpp;
struct scsi_cmnd *SCpnt;
cpp = &ha->cp[i];
SCpnt = cpp->SCpnt;
if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
cpp->din = 1;
cpp->dout = 0;
return;
} else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
cpp->din = 0;
cpp->dout = 1;
return;
} else if (SCpnt->sc_data_direction == DMA_NONE) {
cpp->din = 0;
cpp->dout = 0;
return;
}
if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL)
panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n",
ha->board_name);
for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
if (SCpnt->cmnd[0] == data_out_cmds[k]) {
cpp->dout = 1;
break;
}
if ((cpp->din = !cpp->dout))
for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++)
if (SCpnt->cmnd[0] == data_none_cmds[k]) {
cpp->din = 0;
break;
}
}
static int eata2x_queuecommand(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->serial_number, SCpnt);
/* i is the mailbox number, look for the first free mailbox
starting from last_cp_used */
i = ha->last_cp_used + 1;
for (k = 0; k < shost->can_queue; k++, i++) {
if (i >= shost->can_queue)
i = 0;
if (ha->cp_stat[i] == FREE) {
ha->last_cp_used = i;
break;
}
}
if (k == shost->can_queue) {
printk("%s: qcomm, no free mailbox.\n", ha->board_name);
return 1;
}
/* Set pointer to control packet structure */
cpp = &ha->cp[i];
memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
/* Set pointer to status packet structure, Big Endian format */
cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr);
SCpnt->scsi_done = done;
cpp->cpp_index = i;
SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index;
if (do_trace)
scmd_printk(KERN_INFO, SCpnt,
"qcomm, mbox %d, pid %ld.\n", i, SCpnt->serial_number);
cpp->reqsen = 1;
cpp->dispri = 1;
#if 0
if (SCpnt->device->type == TYPE_TAPE)
cpp->hbaci = 1;
#endif
cpp->one = 1;
cpp->channel = SCpnt->device->channel;
cpp->target = SCpnt->device->id;
cpp->lun = SCpnt->device->lun;
cpp->SCpnt = SCpnt;
memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
/* Use data transfer direction SCpnt->sc_data_direction */
scsi_to_dev_dir(i, ha);
/* Map DMA buffers and SG list */
map_dma(i, ha);
if (linked_comm && SCpnt->device->queue_depth > 2
&& TLDEV(SCpnt->device->type)) {
ha->cp_stat[i] = READY;
flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 0);
return 0;
}
/* Send control packet to the board */
if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
unmap_dma(i, ha);
SCpnt->host_scribble = NULL;
scmd_printk(KERN_INFO, SCpnt,
"qcomm, pid %ld, adapter busy.\n", SCpnt->serial_number);
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) {
scmd_printk(KERN_INFO, SCarg,
"abort, pid %ld inactive.\n", SCarg->serial_number);
return SUCCESS;
}
i = *(unsigned int *)SCarg->host_scribble;
scmd_printk(KERN_WARNING, SCarg,
"abort, mbox %d, pid %ld.\n", i, SCarg->serial_number);
if (i >= shost->can_queue)
panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name);
if (wait_on_busy(shost->io_port, MAXLOOP)) {
printk("%s: abort, timeout error.\n", ha->board_name);
return FAILED;
}
if (ha->cp_stat[i] == FREE) {
printk("%s: abort, mbox %d is free.\n", ha->board_name, i);
return SUCCESS;
}
if (ha->cp_stat[i] == IN_USE) {
printk("%s: abort, mbox %d is in use.\n", ha->board_name, i);
if (SCarg != ha->cp[i].SCpnt)
panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
ha->board_name, i, SCarg, ha->cp[i].SCpnt);
if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
printk("%s: abort, mbox %d, interrupt pending.\n",
ha->board_name, i);
return FAILED;
}
if (ha->cp_stat[i] == IN_RESET) {
printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i);
return FAILED;
}
if (ha->cp_stat[i] == LOCKED) {
printk("%s: abort, mbox %d is locked.\n", ha->board_name, i);
return SUCCESS;
}
if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
unmap_dma(i, ha);
SCarg->result = DID_ABORT << 16;
SCarg->host_scribble = NULL;
ha->cp_stat[i] = FREE;
printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n",
ha->board_name, i, SCarg->serial_number);
SCarg->scsi_done(SCarg);
return SUCCESS;
}
panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i);
}
static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg)
{
unsigned int i, time, k, c, limit = 0;
int arg_done = 0;
struct scsi_cmnd *SCpnt;
struct Scsi_Host *shost = SCarg->device->host;
struct hostdata *ha = (struct hostdata *)shost->hostdata;
scmd_printk(KERN_INFO, SCarg,
"reset, enter, pid %ld.\n", SCarg->serial_number);
spin_lock_irq(shost->host_lock);
if (SCarg->host_scribble == NULL)
printk("%s: reset, pid %ld inactive.\n", ha->board_name, SCarg->serial_number);
if (ha->in_reset) {
printk("%s: reset, exit, already in reset.\n", ha->board_name);
spin_unlock_irq(shost->host_lock);
return FAILED;
}
if (wait_on_busy(shost->io_port, MAXLOOP)) {
printk("%s: reset, exit, timeout error.\n", ha->board_name);
spin_unlock_irq(shost->host_lock);
return FAILED;
}
ha->retries = 0;
for (c = 0; c <= shost->max_channel; c++)
for (k = 0; k < shost->max_id; k++) {
ha->target_redo[k][c] = 1;
ha->target_to[k][c] = 0;
}
for (i = 0; i < shost->can_queue; i++) {
if (ha->cp_stat[i] == FREE)
continue;
if (ha->cp_stat[i] == LOCKED) {
ha->cp_stat[i] = FREE;
printk("%s: reset, locked mbox %d forced free.\n",
ha->board_name, i);
continue;
}
if (!(SCpnt = ha->cp[i].SCpnt))
panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
ha->cp_stat[i] = ABORTING;
printk("%s: reset, mbox %d aborting, pid %ld.\n",
ha->board_name, i, SCpnt->serial_number);
}
else {
ha->cp_stat[i] = IN_RESET;
printk("%s: reset, mbox %d in reset, pid %ld.\n",
ha->board_name, i, SCpnt->serial_number);
}
if (SCpnt->host_scribble == NULL)
panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i);
if (*(unsigned int *)SCpnt->host_scribble != i)
panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i);
if (SCpnt->scsi_done == NULL)
panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n",
ha->board_name, i);
if (SCpnt == SCarg)
arg_done = 1;
}
if (do_dma(shost->io_port, 0, RESET_PIO)) {
printk("%s: reset, cannot reset, timeout error.\n", ha->board_name);
spin_unlock_irq(shost->host_lock);
return FAILED;
}
printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name);
#if defined(DEBUG_RESET)
do_trace = 1;
#endif
ha->in_reset = 1;
spin_unlock_irq(shost->host_lock);
/* FIXME: use a sleep instead */
time = jiffies;
while ((jiffies - time) < (10 * HZ) && limit++ < 200000)
udelay(100L);
spin_lock_irq(shost->host_lock);
printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit);
for (i = 0; i < shost->can_queue; i++) {
if (ha->cp_stat[i] == IN_RESET) {
SCpnt = ha->cp[i].SCpnt;
unmap_dma(i, ha);
SCpnt->result = DID_RESET << 16;
SCpnt->host_scribble = NULL;
/* This mailbox is still waiting for its interrupt */
ha->cp_stat[i] = LOCKED;
printk
("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
ha->board_name, i, SCpnt->serial_number);
}
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->serial_number);
}
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->serial_number);
else
printk("%s: reset, exit.\n", ha->board_name);
spin_unlock_irq(shost->host_lock);
return SUCCESS;
}
int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int *dkinfo)
{
unsigned int size = capacity;
if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) {
dkinfo[0] = 255;
dkinfo[1] = 63;
dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
}
#if defined (DEBUG_GEOMETRY)
printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name,
dkinfo[0], dkinfo[1], dkinfo[2]);
#endif
return 0;
}
static void sort(unsigned long sk[], unsigned int da[], unsigned int n,
unsigned int rev)
{
unsigned int i, j, k, y;
unsigned long x;
for (i = 0; i < n - 1; i++) {
k = i;
for (j = k + 1; j < n; j++)
if (rev) {
if (sk[j] > sk[k])
k = j;
} else {
if (sk[j] < sk[k])
k = j;
}
if (k != i) {
x = sk[k];
sk[k] = sk[i];
sk[i] = x;
y = da[k];
da[k] = da[i];
da[i] = y;
}
}
return;
}
static int reorder(struct hostdata *ha, unsigned long cursec,
unsigned int ihdlr, unsigned int il[], unsigned int n_ready)
{
struct scsi_cmnd *SCpnt;
struct mscp *cpp;
unsigned int k, n;
unsigned int rev = 0, s = 1, r = 1;
unsigned int input_only = 1, overlap = 0;
unsigned long sl[n_ready], pl[n_ready], ll[n_ready];
unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0;
unsigned long ioseek = 0;
static unsigned int flushcount = 0, batchcount = 0, sortcount = 0;
static unsigned int readycount = 0, ovlcount = 0, inputcount = 0;
static unsigned int readysorted = 0, revcount = 0;
static unsigned long seeksorted = 0, seeknosort = 0;
if (link_statistics && !(++flushcount % link_statistics))
printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"
" av %ldK as %ldK.\n", flushcount, batchcount,
inputcount, ovlcount, readycount, readysorted, sortcount,
revcount, seeknosort / (readycount + 1),
seeksorted / (readycount + 1));
if (n_ready <= 1)
return 0;
for (n = 0; n < n_ready; n++) {
k = il[n];
cpp = &ha->cp[k];
SCpnt = cpp->SCpnt;
if (!cpp->din)
input_only = 0;
if (blk_rq_pos(SCpnt->request) < minsec)
minsec = blk_rq_pos(SCpnt->request);
if (blk_rq_pos(SCpnt->request) > maxsec)
maxsec = blk_rq_pos(SCpnt->request);
sl[n] = blk_rq_pos(SCpnt->request);
ioseek += blk_rq_sectors(SCpnt->request);
if (!n)
continue;
if (sl[n] < sl[n - 1])
s = 0;
if (sl[n] > sl[n - 1])
r = 0;
if (link_statistics) {
if (sl[n] > sl[n - 1])
seek += sl[n] - sl[n - 1];
else
seek += sl[n - 1] - sl[n];
}
}
if (link_statistics) {
if (cursec > sl[0])
seek += cursec - sl[0];
else
seek += sl[0] - cursec;
}
if (cursec > ((maxsec + minsec) / 2))
rev = 1;
if (ioseek > ((maxsec - minsec) / 2))
rev = 0;
if (!((rev && r) || (!rev && s)))
sort(sl, il, n_ready, rev);
if (!input_only)
for (n = 0; n < n_ready; n++) {
k = il[n];
cpp = &ha->cp[k];
SCpnt = cpp->SCpnt;
ll[n] = blk_rq_sectors(SCpnt->request);
pl[n] = SCpnt->serial_number;
if (!n)
continue;
if ((sl[n] == sl[n - 1])
|| (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n]))
|| (rev && ((sl[n] + ll[n]) > sl[n - 1])))
overlap = 1;
}
if (overlap)
sort(pl, il, n_ready, 0);
if (link_statistics) {
if (cursec > sl[0])
iseek = cursec - sl[0];
else
iseek = sl[0] - cursec;
batchcount++;
readycount += n_ready;
seeknosort += seek / 1024;
if (input_only)
inputcount++;
if (overlap) {
ovlcount++;
seeksorted += iseek / 1024;
} else
seeksorted += (iseek + maxsec - minsec) / 1024;
if (rev && !r) {
revcount++;
readysorted += n_ready;
}
if (!rev && !s) {
sortcount++;
readysorted += n_ready;
}
}
#if defined(DEBUG_LINKED_COMMANDS)
if (link_statistics && (overlap || !(flushcount % link_statistics)))
for (n = 0; n < n_ready; n++) {
k = il[n];
cpp = &ha->cp[k];
SCpnt = cpp->SCpnt;
scmd_printk(KERN_INFO, SCpnt,
"%s pid %ld mb %d fc %d nr %d sec %ld ns %u"
" cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
(ihdlr ? "ihdlr" : "qcomm"),
SCpnt->serial_number, k, flushcount,
n_ready, blk_rq_pos(SCpnt->request),
blk_rq_sectors(SCpnt->request), cursec, YESNO(s),
YESNO(r), YESNO(rev), YESNO(input_only),
YESNO(overlap), cpp->din);
}
#endif
return overlap;
}
static void flush_dev(struct scsi_device *dev, unsigned long cursec,
struct hostdata *ha, unsigned int ihdlr)
{
struct scsi_cmnd *SCpnt;
struct mscp *cpp;
unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
for (k = 0; k < dev->host->can_queue; k++) {
if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE)
continue;
cpp = &ha->cp[k];
SCpnt = cpp->SCpnt;
if (SCpnt->device != dev)
continue;
if (ha->cp_stat[k] == IN_USE)
return;
il[n_ready++] = k;
}
if (reorder(ha, cursec, ihdlr, il, n_ready))
n_ready = 1;
for (n = 0; n < n_ready; n++) {
k = il[n];
cpp = &ha->cp[k];
SCpnt = cpp->SCpnt;
if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
scmd_printk(KERN_INFO, SCpnt,
"%s, pid %ld, mbox %d, adapter"
" busy, will abort.\n",
(ihdlr ? "ihdlr" : "qcomm"),
SCpnt->serial_number, k);
ha->cp_stat[k] = ABORTING;
continue;
}
ha->cp_stat[k] = IN_USE;
}
}
static irqreturn_t ihdlr(struct Scsi_Host *shost)
{
struct scsi_cmnd *SCpnt;
unsigned int i, k, c, status, tstatus, reg;
struct mssp *spp;
struct mscp *cpp;
struct hostdata *ha = (struct hostdata *)shost->hostdata;
int irq = shost->irq;
/* Check if this board need to be serviced */
if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
goto none;
ha->iocount++;
if (do_trace)
printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq,
ha->iocount);
/* Check if this board is still busy */
if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) {
reg = inb(shost->io_port + REG_STATUS);
printk
("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n",
ha->board_name, irq, reg, ha->iocount);
goto none;
}
spp = &ha->sp;
/* Make a local copy just before clearing the interrupt indication */
memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp));
/* Clear the completion flag and cp pointer on the dynamic copy of sp */
memset(ha->sp_cpu_addr, 0, sizeof(struct mssp));
/* Read the status register to clear the interrupt indication */
reg = inb(shost->io_port + REG_STATUS);
#if defined (DEBUG_INTERRUPT)
{
unsigned char *bytesp;
int cnt;
bytesp = (unsigned char *)spp;
if (ha->iocount < 200) {
printk("sp[] =");
for (cnt = 0; cnt < 15; cnt++)
printk(" 0x%x", bytesp[cnt]);
printk("\n");
}
}
#endif
/* Reject any sp with supspect data */
if (spp->eoc == 0 && ha->iocount > 1)
printk
("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n",
ha->board_name, irq, reg, ha->iocount);
if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue)
printk
("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n",
ha->board_name, spp->cpp_index, irq, reg, ha->iocount);
if (spp->eoc == 0 || spp->cpp_index < 0
|| spp->cpp_index >= shost->can_queue)
goto handled;
/* Find the mailbox to be serviced on this board */
i = spp->cpp_index;
cpp = &(ha->cp[i]);
#if defined(DEBUG_GENERATE_ABORTS)
if ((ha->iocount > 500) && ((ha->iocount % 500) < 3))
goto handled;
#endif
if (ha->cp_stat[i] == IGNORE) {
ha->cp_stat[i] = FREE;
goto handled;
} else if (ha->cp_stat[i] == LOCKED) {
ha->cp_stat[i] = FREE;
printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i,
ha->iocount);
goto handled;
} else if (ha->cp_stat[i] == FREE) {
printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i,
ha->iocount);
goto handled;
} else if (ha->cp_stat[i] == IN_RESET)
printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i);
else if (ha->cp_stat[i] != IN_USE)
panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
ha->board_name, i, ha->cp_stat[i]);
ha->cp_stat[i] = FREE;
SCpnt = cpp->SCpnt;
if (SCpnt == NULL)
panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
if (SCpnt->host_scribble == NULL)
panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n", ha->board_name,
i, SCpnt->serial_number, SCpnt);
if (*(unsigned int *)SCpnt->host_scribble != i)
panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d.\n",
ha->board_name, i, SCpnt->serial_number,
*(unsigned int *)SCpnt->host_scribble);
sync_dma(i, ha);
if (linked_comm && SCpnt->device->queue_depth > 2
&& TLDEV(SCpnt->device->type))
flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 1);
tstatus = status_byte(spp->target_status);
#if defined(DEBUG_GENERATE_ERRORS)
if ((ha->iocount > 500) && ((ha->iocount % 200) < 2))
spp->adapter_status = 0x01;
#endif
switch (spp->adapter_status) {
case ASOK: /* status OK */
/* Forces a reset if a disk drive keeps returning BUSY */
if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
status = DID_ERROR << 16;
/* If there was a bus reset, redo operation on each target */
else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK
&& ha->target_redo[SCpnt->device->id][SCpnt->
device->
channel])
status = DID_BUS_BUSY << 16;
/* Works around a flaw in scsi.c */
else if (tstatus == CHECK_CONDITION
&& SCpnt->device->type == TYPE_DISK
&& (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
status = DID_BUS_BUSY << 16;
else
status = DID_OK << 16;
if (tstatus == GOOD)
ha->target_redo[SCpnt->device->id][SCpnt->device->
channel] = 0;
if (spp->target_status && SCpnt->device->type == TYPE_DISK &&
(!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 &&
(SCpnt->sense_buffer[2] & 0xf) == NOT_READY)))
printk("%s: ihdlr, target %d.%d:%d, pid %ld, "
"target_status 0x%x, sense key 0x%x.\n",
ha->board_name,
SCpnt->device->channel, SCpnt->device->id,
SCpnt->device->lun, SCpnt->serial_number,
spp->target_status, SCpnt->sense_buffer[2]);
ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0;
if (ha->last_retried_pid == SCpnt->serial_number)
ha->retries = 0;
break;
case ASST: /* Selection Time Out */
case 0x02: /* Command Time Out */
if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1)
status = DID_ERROR << 16;
else {
status = DID_TIME_OUT << 16;
ha->target_to[SCpnt->device->id][SCpnt->device->
channel]++;
}
break;
/* Perform a limited number of internal retries */
case 0x03: /* SCSI Bus Reset Received */
case 0x04: /* Initial Controller Power-up */
for (c = 0; c <= shost->max_channel; c++)
for (k = 0; k < shost->max_id; k++)
ha->target_redo[k][c] = 1;
if (SCpnt->device->type != TYPE_TAPE
&& ha->retries < MAX_INTERNAL_RETRIES) {
#if defined(DID_SOFT_ERROR)
status = DID_SOFT_ERROR << 16;
#else
status = DID_BUS_BUSY << 16;
#endif
ha->retries++;
ha->last_retried_pid = SCpnt->serial_number;
} else
status = DID_ERROR << 16;
break;
case 0x05: /* Unexpected Bus Phase */
case 0x06: /* Unexpected Bus Free */
case 0x07: /* Bus Parity Error */
case 0x08: /* SCSI Hung */
case 0x09: /* Unexpected Message Reject */
case 0x0a: /* SCSI Bus Reset Stuck */
case 0x0b: /* Auto Request-Sense Failed */
case 0x0c: /* Controller Ram Parity Error */
default:
status = DID_ERROR << 16;
break;
}
SCpnt->result = status | spp->target_status;
#if defined(DEBUG_INTERRUPT)
if (SCpnt->result || do_trace)
#else
if ((spp->adapter_status != ASOK && ha->iocount > 1000) ||
(spp->adapter_status != ASOK &&
spp->adapter_status != ASST && ha->iocount <= 1000) ||
do_trace || msg_byte(spp->target_status))
#endif
scmd_printk(KERN_INFO, SCpnt, "ihdlr, mbox %2d, err 0x%x:%x,"
" pid %ld, reg 0x%x, count %d.\n",
i, spp->adapter_status, spp->target_status,
SCpnt->serial_number, reg, ha->iocount);
unmap_dma(i, ha);
/* Set the command state to inactive */
SCpnt->host_scribble = NULL;
SCpnt->scsi_done(SCpnt);
if (do_trace)
printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name,
irq, ha->iocount);
handled:
return IRQ_HANDLED;
none:
return IRQ_NONE;
}
static irqreturn_t do_interrupt_handler(int dummy, void *shap)
{
struct Scsi_Host *shost;
unsigned int j;
unsigned long spin_flags;
irqreturn_t ret;
/* Check if the interrupt must be processed by this handler */
if ((j = (unsigned int)((char *)shap - sha)) >= num_boards)
return IRQ_NONE;
shost = sh[j];
spin_lock_irqsave(shost->host_lock, spin_flags);
ret = ihdlr(shost);
spin_unlock_irqrestore(shost->host_lock, spin_flags);
return ret;
}
static int eata2x_release(struct Scsi_Host *shost)
{
struct hostdata *ha = (struct hostdata *)shost->hostdata;
unsigned int i;
for (i = 0; i < shost->can_queue; i++)
kfree((&ha->cp[i])->sglist);
for (i = 0; i < shost->can_queue; i++)
pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr,
sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL);
if (ha->sp_cpu_addr)
pci_free_consistent(ha->pdev, sizeof(struct mssp),
ha->sp_cpu_addr, ha->sp_dma_addr);
free_irq(shost->irq, &sha[ha->board_number]);
if (shost->dma_channel != NO_DMA)
free_dma(shost->dma_channel);
release_region(shost->io_port, shost->n_io_port);
scsi_unregister(shost);
return 0;
}
#include "scsi_module.c"
#ifndef MODULE
__setup("eata=", option_setup);
#endif /* end MODULE */
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