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eata.c
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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);