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| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/eata.c | |
| download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/scsi/eata.c')
| -rw-r--r-- | drivers/scsi/eata.c | 2621 |
1 files changed, 2621 insertions, 0 deletions
diff --git a/drivers/scsi/eata.c b/drivers/scsi/eata.c new file mode 100644 index 000000000000..81d16cfbe69e --- /dev/null +++ b/drivers/scsi/eata.c @@ -0,0 +1,2621 @@ +/* + * eata.c - Low-level driver for EATA/DMA SCSI host adapters. + * + * 03 Jun 2003 Rev. 8.10 for linux-2.5.70 + * + Update for new IRQ API. + * + Use "goto" when appropriate. + * + Drop eata.h. + * + Update for new module_param API. + * + Module parameters can now be specified only in the + * same format as the kernel boot options. + * + * boot option old module param + * ----------- ------------------ + * addr,... io_port=addr,... + * lc:[y|n] linked_comm=[1|0] + * mq:xx max_queue_depth=xx + * tm:[0|1|2] tag_mode=[0|1|2] + * et:[y|n] ext_tran=[1|0] + * rs:[y|n] rev_scan=[1|0] + * ip:[y|n] isa_probe=[1|0] + * ep:[y|n] eisa_probe=[1|0] + * pp:[y|n] pci_probe=[1|0] + * + * A valid example using the new parameter format is: + * modprobe eata "eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n" + * + * which is equivalent to the old format: + * modprobe eata io_port=0x7410,0x230 linked_comm=1 tag_mode=0 \ + * max_queue_depth=4 eisa_probe=0 + * + * 12 Feb 2003 Rev. 8.04 for linux 2.5.60 + * + Release irq before calling scsi_register. + * + * 12 Nov 2002 Rev. 8.02 for linux 2.5.47 + * + Release driver_lock before calling scsi_register. + * + * 11 Nov 2002 Rev. 8.01 for linux 2.5.47 + * + Fixed bios_param and scsicam_bios_param calling parameters. + * + * 28 Oct 2002 Rev. 8.00 for linux 2.5.44-ac4 + * + Use new tcq and adjust_queue_depth api. + * + New command line option (tm:[0-2]) to choose the type of tags: + * 0 -> disable tagging ; 1 -> simple tags ; 2 -> ordered tags. + * Default is tm:0 (tagged commands disabled). + * For compatibility the "tc:" option is an alias of the "tm:" + * option; tc:n is equivalent to tm:0 and tc:y is equivalent to + * tm:1. + * + The tagged_comm module parameter has been removed, use tag_mode + * instead, equivalent to the "tm:" boot option. + * + * 10 Oct 2002 Rev. 7.70 for linux 2.5.42 + * + Foreport from revision 6.70. + * + * 25 Jun 2002 Rev. 6.70 for linux 2.4.19 + * + This release is the first one tested on a Big Endian platform: + * fixed endian-ness problem due to bitfields; + * fixed endian-ness problem in read_pio. + * + Added new options for selectively probing ISA, EISA and PCI bus: + * + * Boot option Parameter name Default according to + * + * ip:[y|n] isa_probe=[1|0] CONFIG_ISA defined + * ep:[y|n] eisa_probe=[1|0] CONFIG_EISA defined + * pp:[y|n] pci_probe=[1|0] CONFIG_PCI defined + * + * The default action is to perform probing if the corrisponding + * bus is configured and to skip probing otherwise. + * + * + If pci_probe is in effect and a list of I/O ports is specified + * as parameter or boot option, pci_enable_device() is performed + * on all pci devices matching PCI_CLASS_STORAGE_SCSI. + * + * 21 Feb 2002 Rev. 6.52 for linux 2.4.18 + * + Backport from rev. 7.22 (use io_request_lock). + * + * 20 Feb 2002 Rev. 7.22 for linux 2.5.5 + * + Remove any reference to virt_to_bus(). + * + Fix pio hang while detecting multiple HBAs. + * + Fixed a board detection bug: in a system with + * multiple ISA/EISA boards, all but the first one + * were erroneously detected as PCI. + * + * 01 Jan 2002 Rev. 7.20 for linux 2.5.1 + * + Use the dynamic DMA mapping API. + * + * 19 Dec 2001 Rev. 7.02 for linux 2.5.1 + * + Use SCpnt->sc_data_direction if set. + * + Use sglist.page instead of sglist.address. + * + * 11 Dec 2001 Rev. 7.00 for linux 2.5.1 + * + Use host->host_lock instead of io_request_lock. + * + * 1 May 2001 Rev. 6.05 for linux 2.4.4 + * + Clean up all pci related routines. + * + Fix data transfer direction for opcode SEND_CUE_SHEET (0x5d) + * + * 30 Jan 2001 Rev. 6.04 for linux 2.4.1 + * + Call pci_resource_start after pci_enable_device. + * + * 25 Jan 2001 Rev. 6.03 for linux 2.4.0 + * + "check_region" call replaced by "request_region". + * + * 22 Nov 2000 Rev. 6.02 for linux 2.4.0-test11 + * + Return code checked when calling pci_enable_device. + * + Removed old scsi error handling support. + * + The obsolete boot option flag eh:n is silently ignored. + * + Removed error messages while a disk drive is powered up at + * boot time. + * + Improved boot messages: all tagged capable device are + * indicated as "tagged" or "soft-tagged" : + * - "soft-tagged" means that the driver is trying to do its + * own tagging (i.e. the tc:y option is in effect); + * - "tagged" means that the device supports tagged commands, + * but the driver lets the HBA be responsible for tagging + * support. + * + * 16 Sep 1999 Rev. 5.11 for linux 2.2.12 and 2.3.18 + * + Updated to the new __setup interface for boot command line options. + * + When loaded as a module, accepts the new parameter boot_options + * which value is a string with the same format of the kernel boot + * command line options. A valid example is: + * modprobe eata 'boot_options="0x7410,0x230,lc:y,tc:n,mq:4"' + * + * 9 Sep 1999 Rev. 5.10 for linux 2.2.12 and 2.3.17 + * + 64bit cleanup for Linux/Alpha platform support + * (contribution from H.J. Lu). + * + * 22 Jul 1999 Rev. 5.00 for linux 2.2.10 and 2.3.11 + * + Removed pre-2.2 source code compatibility. + * + Added call to pci_set_master. + * + * 26 Jul 1998 Rev. 4.33 for linux 2.0.35 and 2.1.111 + * + Added command line option (rs:[y|n]) to reverse the scan order + * of PCI boards. The default is rs:y, which reverses the BIOS order + * while registering PCI boards. The default value rs:y generates + * the same order of all previous revisions of this driver. + * Pls. note that "BIOS order" might have been reversed itself + * after the 2.1.9x PCI modifications in the linux kernel. + * The rs value is ignored when the explicit list of addresses + * is used by the "eata=port0,port1,..." command line option. + * + Added command line option (et:[y|n]) to force use of extended + * translation (255 heads, 63 sectors) as disk geometry. + * The default is et:n, which uses the disk geometry returned + * by scsicam_bios_param. The default value et:n is compatible with + * all previous revisions of this driver. + * + * 28 May 1998 Rev. 4.32 for linux 2.0.33 and 2.1.104 + * Increased busy timeout from 10 msec. to 200 msec. while + * processing interrupts. + * + * 16 May 1998 Rev. 4.31 for linux 2.0.33 and 2.1.102 + * Improved abort handling during the eh recovery process. + * + * 13 May 1998 Rev. 4.30 for linux 2.0.33 and 2.1.101 + * The driver is now fully SMP safe, including the + * abort and reset routines. + * Added command line options (eh:[y|n]) to choose between + * new_eh_code and the old scsi code. + * If linux version >= 2.1.101 the default is eh:y, while the eh + * option is ignored for previous releases and the old scsi code + * is used. + * + * 18 Apr 1998 Rev. 4.20 for linux 2.0.33 and 2.1.97 + * Reworked interrupt handler. + * + * 11 Apr 1998 rev. 4.05 for linux 2.0.33 and 2.1.95 + * Major reliability improvement: when a batch with overlapping + * requests is detected, requests are queued one at a time + * eliminating any possible board or drive reordering. + * + * 10 Apr 1998 rev. 4.04 for linux 2.0.33 and 2.1.95 + * Improved SMP support (if linux version >= 2.1.95). + * + * 9 Apr 1998 rev. 4.03 for linux 2.0.33 and 2.1.94 + * Added support for new PCI code and IO-APIC remapping of irqs. + * Performance improvement: when sequential i/o is detected, + * always use direct sort instead of reverse sort. + * + * 4 Apr 1998 rev. 4.02 for linux 2.0.33 and 2.1.92 + * io_port is now unsigned long. + * + * 17 Mar 1998 rev. 4.01 for linux 2.0.33 and 2.1.88 + * Use new scsi error handling code (if linux version >= 2.1.88). + * Use new interrupt code. + * + * 12 Sep 1997 rev. 3.11 for linux 2.0.30 and 2.1.55 + * Use of udelay inside the wait loops to avoid timeout + * problems with fast cpus. + * Removed check about useless calls to the interrupt service + * routine (reported on SMP systems only). + * At initialization time "sorted/unsorted" is displayed instead + * of "linked/unlinked" to reinforce the fact that "linking" is + * nothing but "elevator sorting" in the actual implementation. + * + * 17 May 1997 rev. 3.10 for linux 2.0.30 and 2.1.38 + * Use of serial_number_at_timeout in abort and reset processing. + * Use of the __initfunc and __initdata macro in setup code. + * Minor cleanups in the list_statistics code. + * Increased controller busy timeout in order to better support + * slow SCSI devices. + * + * 24 Feb 1997 rev. 3.00 for linux 2.0.29 and 2.1.26 + * When loading as a module, parameter passing is now supported + * both in 2.0 and in 2.1 style. + * Fixed data transfer direction for some SCSI opcodes. + * Immediate acknowledge to request sense commands. + * Linked commands to each disk device are now reordered by elevator + * sorting. Rare cases in which reordering of write requests could + * cause wrong results are managed. + * Fixed spurious timeouts caused by long simple queue tag sequences. + * New command line option (tm:[0-3]) to choose the type of tags: + * 0 -> mixed (default); 1 -> simple; 2 -> head; 3 -> ordered. + * + * 18 Jan 1997 rev. 2.60 for linux 2.1.21 and 2.0.28 + * Added command line options to enable/disable linked commands + * (lc:[y|n]), tagged commands (tc:[y|n]) and to set the max queue + * depth (mq:xx). Default is "eata=lc:n,tc:n,mq:16". + * Improved command linking. + * Documented how to setup RAID-0 with DPT SmartRAID boards. + * + * 8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27 + * Added linked command support. + * Improved detection of PCI boards using ISA base addresses. + * + * 3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27 + * Added support for tagged commands and queue depth adjustment. + * + * 22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26 + * When CONFIG_PCI is defined, BIOS32 is used to include in the + * list of i/o ports to be probed all the PCI SCSI controllers. + * The list of i/o ports to be probed can be overwritten by the + * "eata=port0,port1,...." boot command line option. + * Scatter/gather lists are now allocated by a number of kmalloc + * calls, in order to avoid the previous size limit of 64Kb. + * + * 16 Nov 1996 rev. 2.20 for linux 2.1.10 and 2.0.25 + * Added support for EATA 2.0C, PCI, multichannel and wide SCSI. + * + * 27 Sep 1996 rev. 2.12 for linux 2.1.0 + * Portability cleanups (virtual/bus addressing, little/big endian + * support). + * + * 09 Jul 1996 rev. 2.11 for linux 2.0.4 + * Number of internal retries is now limited. + * + * 16 Apr 1996 rev. 2.10 for linux 1.3.90 + * New argument "reset_flags" to the reset routine. + * + * 6 Jul 1995 rev. 2.01 for linux 1.3.7 + * Update required by the new /proc/scsi support. + * + * 11 Mar 1995 rev. 2.00 for linux 1.2.0 + * Fixed a bug which prevented media change detection for removable + * disk drives. + * + * 23 Feb 1995 rev. 1.18 for linux 1.1.94 + * Added a check for scsi_register returning NULL. + * + * 11 Feb 1995 rev. 1.17 for linux 1.1.91 + * Now DEBUG_RESET is disabled by default. + * Register a board even if it does not assert DMA protocol support + * (DPT SK2011B does not report correctly the dmasup bit). + * + * 9 Feb 1995 rev. 1.16 for linux 1.1.90 + * Use host->wish_block instead of host->block. + * New list of Data Out SCSI commands. + * + * 8 Feb 1995 rev. 1.15 for linux 1.1.89 + * Cleared target_time_out counter while performing a reset. + * All external symbols renamed to avoid possible name conflicts. + * + * 28 Jan 1995 rev. 1.14 for linux 1.1.86 + * Added module support. + * Log and do a retry when a disk drive returns a target status + * different from zero on a recovered error. + * + * 24 Jan 1995 rev. 1.13 for linux 1.1.85 + * Use optimized board configuration, with a measured performance + * increase in the range 10%-20% on i/o throughput. + * + * 16 Jan 1995 rev. 1.12 for linux 1.1.81 + * Fix mscp structure comments (no functional change). + * Display a message if check_region detects a port address + * already in use. + * + * 17 Dec 1994 rev. 1.11 for linux 1.1.74 + * Use the scsicam_bios_param routine. This allows an easy + * migration path from disk partition tables created using + * different SCSI drivers and non optimal disk geometry. + * + * 15 Dec 1994 rev. 1.10 for linux 1.1.74 + * Added support for ISA EATA boards (DPT PM2011, DPT PM2021). + * The host->block flag is set for all the detected ISA boards. + * The detect routine no longer enforces LEVEL triggering + * for EISA boards, it just prints a warning message. + * + * 30 Nov 1994 rev. 1.09 for linux 1.1.68 + * Redo i/o on target status CHECK_CONDITION for TYPE_DISK only. + * Added optional support for using a single board at a time. + * + * 18 Nov 1994 rev. 1.08 for linux 1.1.64 + * Forces sg_tablesize = 64 and can_queue = 64 if these + * values are not correctly detected (DPT PM2012). + * + * 14 Nov 1994 rev. 1.07 for linux 1.1.63 Final BETA release. + * 04 Aug 1994 rev. 1.00 for linux 1.1.39 First BETA release. + * + * + * This driver is based on the CAM (Common Access Method Committee) + * EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol. + * + * Copyright (C) 1994-2003 Dario Ballabio (ballabio_dario@emc.com) + * + * Alternate email: dario.ballabio@inwind.it, dario.ballabio@tiscalinet.it + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that redistributions of source + * code retain the above copyright notice and this comment without + * modification. + * + */ + +/* + * + * Here is a brief description of the DPT SCSI host adapters. + * All these boards provide an EATA/DMA compatible programming interface + * and are fully supported by this driver in any configuration, including + * multiple SCSI channels: + * + * PM2011B/9X - Entry Level ISA + * PM2021A/9X - High Performance ISA + * PM2012A Old EISA + * PM2012B Old EISA + * PM2022A/9X - Entry Level EISA + * PM2122A/9X - High Performance EISA + * PM2322A/9X - Extra High Performance EISA + * PM3021 - SmartRAID Adapter for ISA + * PM3222 - SmartRAID Adapter for EISA (PM3222W is 16-bit wide SCSI) + * PM3224 - SmartRAID Adapter for PCI (PM3224W is 16-bit wide SCSI) + * PM33340UW - SmartRAID Adapter for PCI ultra wide multichannel + * + * The above list is just an indication: as a matter of fact all DPT + * boards using the EATA/DMA protocol are supported by this driver, + * since they use exactely the same programming interface. + * + * The DPT PM2001 provides only the EATA/PIO interface and hence is not + * supported by this driver. + * + * This code has been tested with up to 3 Distributed Processing Technology + * PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) EISA controllers, + * in any combination of private and shared IRQ. + * PCI support has been tested using up to 2 DPT PM3224W (DPT SCSI BIOS + * v003.D0, firmware v07G.0). + * + * DPT SmartRAID boards support "Hardware Array" - a group of disk drives + * which are all members of the same RAID-0, RAID-1 or RAID-5 array implemented + * in host adapter hardware. Hardware Arrays are fully compatible with this + * driver, since they look to it as a single disk drive. + * + * WARNING: to create a RAID-0 "Hardware Array" you must select "Other Unix" + * as the current OS in the DPTMGR "Initial System Installation" menu. + * Otherwise RAID-0 is generated as an "Array Group" (i.e. software RAID-0), + * which is not supported by the actual SCSI subsystem. + * To get the "Array Group" functionality, the Linux MD driver must be used + * instead of the DPT "Array Group" feature. + * + * Multiple ISA, EISA and PCI boards can be configured in the same system. + * It is suggested to put all the EISA boards on the same IRQ level, all + * the PCI boards on another IRQ level, while ISA boards cannot share + * interrupts. + * + * If you configure multiple boards on the same IRQ, the interrupt must + * be _level_ triggered (not _edge_ triggered). + * + * This driver detects EATA boards by probes at fixed port addresses, + * so no BIOS32 or PCI BIOS support is required. + * The suggested way to detect a generic EATA PCI board is to force on it + * any unused EISA address, even if there are other controllers on the EISA + * bus, or even if you system has no EISA bus at all. + * Do not force any ISA address on EATA PCI boards. + * + * If PCI bios support is configured into the kernel, BIOS32 is used to + * include in the list of i/o ports to be probed all the PCI SCSI controllers. + * + * Due to a DPT BIOS "feature", it might not be possible to force an EISA + * address on more than a single DPT PCI board, so in this case you have to + * let the PCI BIOS assign the addresses. + * + * The sequence of detection probes is: + * + * - ISA 0x1F0; + * - PCI SCSI controllers (only if BIOS32 is available); + * - EISA/PCI 0x1C88 through 0xFC88 (corresponding to EISA slots 1 to 15); + * - ISA 0x170, 0x230, 0x330. + * + * The above list of detection probes can be totally replaced by the + * boot command line option: "eata=port0,port1,port2,...", where the + * port0, port1... arguments are ISA/EISA/PCI addresses to be probed. + * For example using "eata=0x7410,0x7450,0x230", the driver probes + * only the two PCI addresses 0x7410 and 0x7450 and the ISA address 0x230, + * in this order; "eata=0" totally disables this driver. + * + * After the optional list of detection probes, other possible command line + * options are: + * + * et:y force use of extended translation (255 heads, 63 sectors); + * et:n use disk geometry detected by scsicam_bios_param; + * rs:y reverse scan order while detecting PCI boards; + * rs:n use BIOS order while detecting PCI boards; + * lc:y enables linked commands; + * lc:n disables linked commands; + * tm:0 disables tagged commands (same as tc:n); + * tm:1 use simple queue tags (same as tc:y); + * tm:2 use ordered queue tags (same as tc:2); + * mq:xx set the max queue depth to the value xx (2 <= xx <= 32). + * + * The default value is: "eata=lc:n,mq:16,tm:0,et:n,rs:n". + * An example using the list of detection probes could be: + * "eata=0x7410,0x230,lc:y,tm:2,mq:4,et:n". + * + * When loading as a module, parameters can be specified as well. + * The above example would be (use 1 in place of y and 0 in place of n): + * + * modprobe eata io_port=0x7410,0x230 linked_comm=1 \ + * max_queue_depth=4 ext_tran=0 tag_mode=2 \ + * rev_scan=1 + * + * ---------------------------------------------------------------------------- + * In this implementation, linked commands are designed to work with any DISK + * or CD-ROM, since this linking has only the intent of clustering (time-wise) + * and reordering by elevator sorting commands directed to each device, + * without any relation with the actual SCSI protocol between the controller + * and the device. + * If Q is the queue depth reported at boot time for each device (also named + * cmds/lun) and Q > 2, whenever there is already an active command to the + * device all other commands to the same device (up to Q-1) are kept waiting + * in the elevator sorting queue. When the active command completes, the + * commands in this queue are sorted by sector address. The sort is chosen + * between increasing or decreasing by minimizing the seek distance between + * the sector of the commands just completed and the sector of the first + * command in the list to be sorted. + * Trivial math assures that the unsorted average seek distance when doing + * random seeks over S sectors is S/3. + * When (Q-1) requests are uniformly distributed over S sectors, the average + * distance between two adjacent requests is S/((Q-1) + 1), so the sorted + * average seek distance for (Q-1) random requests over S sectors is S/Q. + * The elevator sorting hence divides the seek distance by a factor Q/3. + * The above pure geometric remarks are valid in all cases and the + * driver effectively reduces the seek distance by the predicted factor + * when there are Q concurrent read i/o operations on the device, but this + * does not necessarily results in a noticeable performance improvement: + * your mileage may vary.... + * + * Note: command reordering inside a batch of queued commands could cause + * wrong results only if there is at least one write request and the + * intersection (sector-wise) of all requests is not empty. + * When the driver detects a batch including overlapping requests + * (a really rare event) strict serial (pid) order is enforced. + * ---------------------------------------------------------------------------- + * The extended translation option (et:y) is useful when using large physical + * disks/arrays. It could also be useful when switching between Adaptec boards + * and DPT boards without reformatting the disk. + * When a boot disk is partitioned with extended translation, in order to + * be able to boot it with a DPT board is could be necessary to add to + * lilo.conf additional commands as in the following example: + * + * fix-table + * disk=/dev/sda bios=0x80 sectors=63 heads=128 cylindres=546 + * + * where the above geometry should be replaced with the one reported at + * power up by the DPT controller. + * ---------------------------------------------------------------------------- + * + * The boards are named EATA0, EATA1,... according to the detection order. + * + * In order to support multiple ISA boards in a reliable way, + * the driver sets host->wish_block = 1 for all ISA boards. + */ + +#include <linux/config.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/proc_fs.h> +#include <linux/blkdev.h> +#include <linux/interrupt.h> +#include <linux/stat.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/ctype.h> +#include <linux/spinlock.h> +#include <asm/byteorder.h> +#include <asm/dma.h> +#include <asm/io.h> +#include <asm/irq.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsicam.h> + +static int eata2x_detect(struct scsi_host_template *); +static int eata2x_release(struct Scsi_Host *); +static int eata2x_queuecommand(struct scsi_cmnd *, + void (*done) (struct scsi_cmnd *)); +static int eata2x_eh_abort(struct scsi_cmnd *); +static int eata2x_eh_host_reset(struct scsi_cmnd *); +static int eata2x_bios_param(struct scsi_device *, struct block_device *, + sector_t, int *); +static int eata2x_slave_configure(struct scsi_device *); + +static struct scsi_host_template driver_template = { + .name = "EATA/DMA 2.0x rev. 8.10.00 ", + .detect = eata2x_detect, + .release = eata2x_release, + .queuecommand = eata2x_queuecommand, + .eh_abort_handler = eata2x_eh_abort, + .eh_device_reset_handler = NULL, + .eh_bus_reset_handler = NULL, + .eh_host_reset_handler = eata2x_eh_host_reset, + .bios_param = eata2x_bios_param, + .slave_configure = eata2x_slave_configure, + .this_id = 7, + .unchecked_isa_dma = 1, + .use_clustering = ENABLE_CLUSTERING +}; + +#if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD) +#error "Adjust your <asm/byteorder.h> defines" +#endif + +/* Subversion values */ +#define ISA 0 +#define ESA 1 + +#undef FORCE_CONFIG + +#undef DEBUG_LINKED_COMMANDS +#undef DEBUG_DETECT +#undef DEBUG_PCI_DETECT +#undef DEBUG_INTERRUPT +#undef DEBUG_RESET +#undef DEBUG_GENERATE_ERRORS +#undef DEBUG_GENERATE_ABORTS +#undef DEBUG_GEOMETRY + +#define MAX_ISA 4 +#define MAX_VESA 0 +#define MAX_EISA 15 +#define MAX_PCI 16 +#define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI) +#define MAX_CHANNEL 4 +#define MAX_LUN 32 +#define MAX_TARGET 32 +#define MAX_MAILBOXES 64 +#define MAX_SGLIST 64 +#define MAX_LARGE_SGLIST 122 +#define MAX_INTERNAL_RETRIES 64 +#define MAX_CMD_PER_LUN 2 +#define MAX_TAGGED_CMD_PER_LUN (MAX_MAILBOXES - MAX_CMD_PER_LUN) + +#define SKIP ULONG_MAX +#define FREE 0 +#define IN_USE 1 +#define LOCKED 2 +#define IN_RESET 3 +#define IGNORE 4 +#define READY 5 +#define ABORTING 6 +#define NO_DMA 0xff +#define MAXLOOP 10000 +#define TAG_DISABLED 0 +#define TAG_SIMPLE 1 +#define TAG_ORDERED 2 + +#define REG_CMD 7 +#define REG_STATUS 7 +#define REG_AUX_STATUS 8 +#define REG_DATA 0 +#define REG_DATA2 1 +#define REG_SEE 6 +#define REG_LOW 2 +#define REG_LM 3 +#define REG_MID 4 +#define REG_MSB 5 +#define REGION_SIZE 9UL +#define MAX_ISA_ADDR 0x03ff +#define MIN_EISA_ADDR 0x1c88 +#define MAX_EISA_ADDR 0xfc88 +#define BSY_ASSERTED 0x80 +#define DRQ_ASSERTED 0x08 +#define ABSY_ASSERTED 0x01 +#define IRQ_ASSERTED 0x02 +#define READ_CONFIG_PIO 0xf0 +#define SET_CONFIG_PIO 0xf1 +#define SEND_CP_PIO 0xf2 +#define RECEIVE_SP_PIO 0xf3 +#define TRUNCATE_XFR_PIO 0xf4 +#define RESET_PIO 0xf9 +#define READ_CONFIG_DMA 0xfd +#define SET_CONFIG_DMA 0xfe +#define SEND_CP_DMA 0xff +#define ASOK 0x00 +#define ASST 0x01 + +#define YESNO(a) ((a) ? 'y' : 'n') +#define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM) + +/* "EATA", in Big Endian format */ +#define EATA_SIG_BE 0x45415441 + +/* Number of valid bytes in the board config structure for EATA 2.0x */ +#define EATA_2_0A_SIZE 28 +#define EATA_2_0B_SIZE 30 +#define EATA_2_0C_SIZE 34 + +/* Board info structure */ +struct eata_info { + u_int32_t data_len; /* Number of valid bytes after this field */ + u_int32_t sign; /* ASCII "EATA" signature */ + +#if defined(__BIG_ENDIAN_BITFIELD) + unchar version : 4, + : 4; + unchar haaval : 1, + ata : 1, + drqvld : 1, + dmasup : 1, + morsup : 1, + trnxfr : 1, + tarsup : 1, + ocsena : 1; +#else + unchar : 4, /* unused low nibble */ + version : 4; /* EATA version, should be 0x1 */ + unchar ocsena : 1, /* Overlap Command Support Enabled */ + tarsup : 1, /* Target Mode Supported */ + trnxfr : 1, /* Truncate Transfer Cmd NOT Necessary */ + morsup : 1, /* More Supported */ + dmasup : 1, /* DMA Supported */ + drqvld : 1, /* DRQ Index (DRQX) is valid */ + ata : 1, /* This is an ATA device */ + haaval : 1; /* Host Adapter Address Valid */ +#endif + + ushort cp_pad_len; /* Number of pad bytes after cp_len */ + unchar host_addr[4]; /* Host Adapter SCSI ID for channels 3, 2, 1, 0 */ + u_int32_t cp_len; /* Number of valid bytes in cp */ + u_int32_t sp_len; /* Number of valid bytes in sp */ + ushort queue_size; /* Max number of cp that can be queued */ + ushort unused; + ushort scatt_size; /* Max number of entries in scatter/gather table */ + +#if defined(__BIG_ENDIAN_BITFIELD) + unchar drqx : 2, + second : 1, + irq_tr : 1, + irq : 4; + unchar sync; + unchar : 4, + res1 : 1, + large_sg : 1, + forcaddr : 1, + isaena : 1; + unchar max_chan : 3, + max_id : 5; + unchar max_lun; + unchar eisa : 1, + pci : 1, + idquest : 1, + m1 : 1, + : 4; +#else + unchar irq : 4, /* Interrupt Request assigned to this controller */ + irq_tr : 1, /* 0 for edge triggered, 1 for level triggered */ + second : 1, /* 1 if this is a secondary (not primary) controller */ + drqx : 2; /* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */ + unchar sync; /* 1 if scsi target id 7...0 is running sync scsi */ + + /* Structure extension defined in EATA 2.0B */ + unchar isaena : 1, /* ISA i/o addressing is disabled/enabled */ + forcaddr : 1, /* Port address has been forced */ + large_sg : 1, /* 1 if large SG lists are supported */ + res1 : 1, + : 4; + unchar max_id : 5, /* Max SCSI target ID number */ + max_chan : 3; /* Max SCSI channel number on this board */ + + /* Structure extension defined in EATA 2.0C */ + unchar max_lun; /* Max SCSI LUN number */ + unchar + : 4, + m1 : 1, /* This is a PCI with an M1 chip installed */ + idquest : 1, /* RAIDNUM returned is questionable */ + pci : 1, /* This board is PCI */ + eisa : 1; /* This board is EISA */ +#endif + + unchar raidnum; /* Uniquely identifies this HBA in a system */ + unchar notused; + + ushort ipad[247]; +}; + +/* Board config structure */ +struct eata_config { + ushort len; /* Number of bytes following this field */ + +#if defined(__BIG_ENDIAN_BITFIELD) + unchar : 4, + tarena : 1, + mdpena : 1, + ocena : 1, + edis : 1; +#else + unchar edis : 1, /* Disable EATA interface after config command */ + ocena : 1, /* Overlapped Commands Enabled */ + mdpena : 1, /* Transfer all Modified Data Pointer Messages */ + tarena : 1, /* Target Mode Enabled for this controller */ + : 4; +#endif + unchar cpad[511]; +}; + +/* Returned status packet structure */ +struct mssp { +#if defined(__BIG_ENDIAN_BITFIELD) + unchar eoc : 1, + adapter_status : 7; +#else + unchar adapter_status : 7, /* State related to current command */ + eoc : 1; /* End Of Command (1 = command completed) */ +#endif + unchar target_status; /* SCSI status received after data transfer */ + unchar unused[2]; + u_int32_t inv_res_len; /* Number of bytes not transferred */ + u_int32_t cpp_index; /* Index of address set in cp */ + char mess[12]; +}; + +struct sg_list { + unsigned int address; /* Segment Address */ + unsigned int num_bytes; /* Segment Length */ +}; + +/* MailBox SCSI Command Packet */ +struct mscp { +#if defined(__BIG_ENDIAN_BITFIELD) + unchar din : 1, + dout : 1, + interp : 1, + : 1, + sg : 1, + reqsen :1, + init : 1, + sreset : 1; + unchar sense_len; + unchar unused[3]; + unchar : 7, + fwnest : 1; + unchar : 5, + hbaci : 1, + iat : 1, + phsunit : 1; + unchar channel : 3, + target : 5; + unchar one : 1, + dispri : 1, + luntar : 1, + lun : 5; +#else + unchar sreset :1, /* SCSI Bus Reset Signal should be asserted */ + init :1, /* Re-initialize controller and self test */ + reqsen :1, /* Transfer Request Sense Data to addr using DMA */ + sg :1, /* Use Scatter/Gather */ + :1, + interp :1, /* The controller interprets cp, not the target */ + dout :1, /* Direction of Transfer is Out (Host to Target) */ + din :1; /* Direction of Transfer is In (Target to Host) */ + unchar sense_len; /* Request Sense Length */ + unchar unused[3]; + unchar fwnest : 1, /* Send command to a component of an Array Group */ + : 7; + unchar phsunit : 1, /* Send to Target Physical Unit (bypass RAID) */ + iat : 1, /* Inhibit Address Translation */ + hbaci : 1, /* Inhibit HBA Caching for this command */ + : 5; + unchar target : 5, /* SCSI target ID */ + channel : 3; /* SCSI channel number */ + unchar lun : 5, /* SCSI logical unit number */ + luntar : 1, /* This cp is for Target (not LUN) */ + dispri : 1, /* Disconnect Privilege granted */ + one : 1; /* 1 */ +#endif + + unchar mess[3]; /* Massage to/from Target */ + unchar cdb[12]; /* Command Descriptor Block */ + u_int32_t data_len; /* If sg=0 Data Length, if sg=1 sglist length */ + u_int32_t cpp_index; /* Index of address to be returned in sp */ + u_int32_t data_address; /* If sg=0 Data Address, if sg=1 sglist address */ + u_int32_t sp_dma_addr; /* Address where sp is DMA'ed when cp completes */ + u_int32_t sense_addr; /* Address where Sense Data is DMA'ed on error */ + + /* Additional fields begin here. */ + struct scsi_cmnd *SCpnt; + + /* All the cp structure is zero filled by queuecommand except the + following CP_TAIL_SIZE bytes, initialized by detect */ + dma_addr_t cp_dma_addr; /* dma handle for this cp structure */ + struct sg_list *sglist; /* pointer to the allocated SG list */ +}; + +#define CP_TAIL_SIZE (sizeof(struct sglist *) + sizeof(dma_addr_t)) + +struct hostdata { + struct mscp cp[MAX_MAILBOXES]; /* Mailboxes for this board */ + unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */ + unsigned int last_cp_used; /* Index of last mailbox used */ + unsigned int iocount; /* Total i/o done for this board */ + int board_number; /* Number of this board */ + char board_name[16]; /* Name of this board */ + int in_reset; /* True if board is doing a reset */ + int target_to[MAX_TARGET][MAX_CHANNEL]; /* N. of timeout errors on target */ + int target_redo[MAX_TARGET][MAX_CHANNEL]; /* If 1 redo i/o on target */ + unsigned int retries; /* Number of internal retries */ + unsigned long last_retried_pid; /* Pid of last retried command */ + unsigned char subversion; /* Bus type, either ISA or EISA/PCI */ + unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */ + unsigned char is_pci; /* 1 is bus type is PCI */ + struct pci_dev *pdev; /* pdev for PCI bus, NULL otherwise */ + struct mssp *sp_cpu_addr; /* cpu addr for DMA buffer sp */ + dma_addr_t sp_dma_addr; /* dma handle for DMA buffer sp */ + struct mssp sp; /* Local copy of sp buffer */ +}; + +static struct Scsi_Host *sh[MAX_BOARDS]; +static const char *driver_name = "EATA"; +static char sha[MAX_BOARDS]; +static DEFINE_SPINLOCK(driver_lock); + +/* Initialize num_boards so that ihdlr can work while detect is in progress */ +static unsigned int num_boards = MAX_BOARDS; + +static unsigned long io_port[] = { + + /* Space for MAX_INT_PARAM ports usable while loading as a module */ + SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, + SKIP, SKIP, + + /* First ISA */ + 0x1f0, + + /* Space for MAX_PCI ports possibly reported by PCI_BIOS */ + SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, + SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, + + /* MAX_EISA ports */ + 0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88, + 0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88, + + /* Other (MAX_ISA - 1) ports */ + 0x170, 0x230, 0x330, + + /* End of list */ + 0x0 +}; + +/* Device is Big Endian */ +#define H2DEV(x) cpu_to_be32(x) +#define DEV2H(x) be32_to_cpu(x) +#define H2DEV16(x) cpu_to_be16(x) +#define DEV2H16(x) be16_to_cpu(x) + +/* But transfer orientation from the 16 bit data register is Little Endian */ +#define REG2H(x) le16_to_cpu(x) + +static irqreturn_t do_interrupt_handler(int, void *, struct pt_regs *); +static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *, + unsigned int); +static int do_trace = 0; +static int setup_done = 0; +static int link_statistics; +static int ext_tran = 0; +static int rev_scan = 1; + +#if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE) +static int tag_mode = TAG_SIMPLE; +#else +static int tag_mode = TAG_DISABLED; +#endif + +#if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS) +static int linked_comm = 1; +#else +static int linked_comm = 0; +#endif + +#if defined(CONFIG_SCSI_EATA_MAX_TAGS) +static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS; +#else +static int max_queue_depth = MAX_CMD_PER_LUN; +#endif + +#if defined(CONFIG_ISA) +static int isa_probe = 1; +#else +static int isa_probe = 0; +#endif + +#if defined(CONFIG_EISA) +static int eisa_probe = 1; +#else +static int eisa_probe = 0; +#endif + +#if defined(CONFIG_PCI) +static int pci_probe = 1; +#else +static int pci_probe = 0; +#endif + +#define MAX_INT_PARAM 10 +#define MAX_BOOT_OPTIONS_SIZE 256 +static char boot_options[MAX_BOOT_OPTIONS_SIZE]; + +#if defined(MODULE) +#include <linux/module.h> +#include <linux/moduleparam.h> + +module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0); +MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option." + " Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\""); +MODULE_AUTHOR("Dario Ballabio"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("EATA/DMA SCSI Driver"); + +#endif + +static int eata2x_slave_configure(struct scsi_device *dev) +{ + int tqd, utqd; + char *tag_suffix, *link_suffix; + struct Scsi_Host *shost = dev->host; + struct hostdata *ha = (struct hostdata *)shost->hostdata; + + utqd = MAX_CMD_PER_LUN; + tqd = max_queue_depth; + + if (TLDEV(dev->type) && dev->tagged_supported) { + if (tag_mode == TAG_SIMPLE) { + scsi_adjust_queue_depth(dev, MSG_SIMPLE_TAG, tqd); + tag_suffix = ", simple tags"; + } else if (tag_mode == TAG_ORDERED) { + scsi_adjust_queue_depth(dev, MSG_ORDERED_TAG, tqd); + tag_suffix = ", ordered tags"; + } else { + scsi_adjust_queue_depth(dev, 0, tqd); + tag_suffix = ", no tags"; + } + } else if (TLDEV(dev->type) && linked_comm) { + scsi_adjust_queue_depth(dev, 0, tqd); + tag_suffix = ", untagged"; + } else { + scsi_adjust_queue_depth(dev, 0, utqd); + tag_suffix = ""; + } + + if (TLDEV(dev->type) && linked_comm && dev->queue_depth > 2) + link_suffix = ", sorted"; + else if (TLDEV(dev->type)) + link_suffix = ", unsorted"; + else + link_suffix = ""; + + printk("%s: scsi%d, channel %d, id %d, lun %d, cmds/lun %d%s%s.\n", + ha->board_name, shost->host_no, dev->channel, dev->id, dev->lun, + dev->queue_depth, link_suffix, tag_suffix); + + return 0; +} + +static int wait_on_busy(unsigned long iobase, unsigned int loop) +{ + while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) { + udelay(1L); + if (--loop == 0) + return 1; + } + return 0; +} + +static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd) +{ + unsigned char *byaddr; + unsigned long devaddr; + + if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP))) + return 1; + + if (addr) { + devaddr = H2DEV(addr); + byaddr = (unsigned char *)&devaddr; + outb(byaddr[3], iobase + REG_LOW); + outb(byaddr[2], iobase + REG_LM); + outb(byaddr[1], iobase + REG_MID); + outb(byaddr[0], iobase + REG_MSB); + } + + outb(cmd, iobase + REG_CMD); + return 0; +} + +static int read_pio(unsigned long iobase, ushort * start, ushort * end) +{ + unsigned int loop = MAXLOOP; + ushort *p; + + for (p = start; p <= end; p++) { + while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) { + udelay(1L); + if (--loop == 0) + return 1; + } + loop = MAXLOOP; + *p = REG2H(inw(iobase)); + } + + return 0; +} + +static struct pci_dev *get_pci_dev(unsigned long port_base) +{ +#if defined(CONFIG_PCI) + unsigned int addr; + struct pci_dev *dev = NULL; + + while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) { + addr = pci_resource_start(dev, 0); + +#if defined(DEBUG_PCI_DETECT) + printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n", + driver_name, dev->bus->number, dev->devfn, addr); +#endif + + /* we are in so much trouble for a pci hotplug system with this driver + * anyway, so doing this at least lets people unload the driver and not + * cause memory problems, but in general this is a bad thing to do (this + * driver needs to be converted to the proper PCI api someday... */ + pci_dev_put(dev); + if (addr + PCI_BASE_ADDRESS_0 == port_base) + return dev; + } +#endif /* end CONFIG_PCI */ + return NULL; +} + +static void enable_pci_ports(void) +{ +#if defined(CONFIG_PCI) + struct pci_dev *dev = NULL; + + while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) { +#if defined(DEBUG_PCI_DETECT) + printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n", + driver_name, dev->bus->number, dev->devfn); +#endif + + if (pci_enable_device(dev)) + printk + ("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n", + driver_name, dev->bus->number, dev->devfn); + } + +#endif /* end CONFIG_PCI */ +} + +static int port_detect(unsigned long port_base, unsigned int j, + struct scsi_host_template *tpnt) +{ + unsigned char irq, dma_channel, subversion, i, is_pci = 0; + unsigned char protocol_rev; + struct eata_info info; + char *bus_type, dma_name[16]; + struct pci_dev *pdev; + /* Allowed DMA channels for ISA (0 indicates reserved) */ + unsigned char dma_channel_table[4] = { 5, 6, 7, 0 }; + struct Scsi_Host *shost; + struct hostdata *ha; + char name[16]; + + sprintf(name, "%s%d", driver_name, j); + + if (!request_region(port_base, REGION_SIZE, driver_name)) { +#if defined(DEBUG_DETECT) + printk("%s: address 0x%03lx in use, skipping probe.\n", name, + port_base); +#endif + goto fail; + } + + spin_lock_irq(&driver_lock); + + if (do_dma(port_base, 0, READ_CONFIG_PIO)) { +#if defined(DEBUG_DETECT) + printk("%s: detect, do_dma failed at 0x%03lx.\n", name, + port_base); +#endif + goto freelock; + } + + /* Read the info structure */ + if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) { +#if defined(DEBUG_DETECT) + printk("%s: detect, read_pio failed at 0x%03lx.\n", name, + port_base); +#endif + goto freelock; + } + + info.data_len = DEV2H(info.data_len); + info.sign = DEV2H(info.sign); + info.cp_pad_len = DEV2H16(info.cp_pad_len); + info.cp_len = DEV2H(info.cp_len); + info.sp_len = DEV2H(info.sp_len); + info.scatt_size = DEV2H16(info.scatt_size); + info.queue_size = DEV2H16(info.queue_size); + + /* Check the controller "EATA" signature */ + if (info.sign != EATA_SIG_BE) { +#if defined(DEBUG_DETECT) + printk("%s: signature 0x%04x discarded.\n", name, info.sign); +#endif + goto freelock; + } + + if (info.data_len < EATA_2_0A_SIZE) { + printk + ("%s: config structure size (%d bytes) too short, detaching.\n", + name, info.data_len); + goto freelock; + } else if (info.data_len == EATA_2_0A_SIZE) + protocol_rev = 'A'; + else if (info.data_len == EATA_2_0B_SIZE) + protocol_rev = 'B'; + else + protocol_rev = 'C'; + + if (protocol_rev != 'A' && info.forcaddr) { + printk("%s: warning, port address has been forced.\n", name); + bus_type = "PCI"; + is_pci = 1; + subversion = ESA; + } else if (port_base > MAX_EISA_ADDR + || (protocol_rev == 'C' && info.pci)) { + bus_type = "PCI"; + is_pci = 1; + subversion = ESA; + } else if (port_base >= MIN_EISA_ADDR + || (protocol_rev == 'C' && info.eisa)) { + bus_type = "EISA"; + subversion = ESA; + } else if (protocol_rev == 'C' && !info.eisa && !info.pci) { + bus_type = "ISA"; + subversion = ISA; + } else if (port_base > MAX_ISA_ADDR) { + bus_type = "PCI"; + is_pci = 1; + subversion = ESA; + } else { + bus_type = "ISA"; + subversion = ISA; + } + + if (!info.haaval || info.ata) { + printk + ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n", + name, port_base, bus_type, info.haaval, info.ata); + goto freelock; + } + + if (info.drqvld) { + if (subversion == ESA) + printk("%s: warning, weird %s board using DMA.\n", name, + bus_type); + + subversion = ISA; + dma_channel = dma_channel_table[3 - info.drqx]; + } else { + if (subversion == ISA) + printk("%s: warning, weird %s board not using DMA.\n", + name, bus_type); + + subversion = ESA; + dma_channel = NO_DMA; + } + + if (!info.dmasup) + printk("%s: warning, DMA protocol support not asserted.\n", + name); + + irq = info.irq; + + if (subversion == ESA && !info.irq_tr) + printk + ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n", + name, irq); + + if (is_pci) { + pdev = get_pci_dev(port_base); + if (!pdev) + printk + ("%s: warning, failed to get pci_dev structure.\n", + name); + } else + pdev = NULL; + + if (pdev && (irq != pdev->irq)) { + printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq, + pdev->irq); + irq = pdev->irq; + } + + /* Board detected, allocate its IRQ */ + if (request_irq(irq, do_interrupt_handler, + SA_INTERRUPT | ((subversion == ESA) ? SA_SHIRQ : 0), + driver_name, (void *)&sha[j])) { + printk("%s: unable to allocate IRQ %u, detaching.\n", name, + irq); + goto freelock; + } + + if (subversion == ISA && request_dma(dma_channel, driver_name)) { + printk("%s: unable to allocate DMA channel %u, detaching.\n", + name, dma_channel); + goto freeirq; + } +#if defined(FORCE_CONFIG) + { + struct eata_config *cf; + dma_addr_t cf_dma_addr; + + cf = pci_alloc_consistent(pdev, sizeof(struct eata_config), + &cf_dma_addr); + + if (!cf) { + printk + ("%s: config, pci_alloc_consistent failed, detaching.\n", + name); + goto freedma; + } + + /* Set board configuration */ + memset((char *)cf, 0, sizeof(struct eata_config)); + cf->len = (ushort) H2DEV16((ushort) 510); + cf->ocena = 1; + + if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) { + printk + ("%s: busy timeout sending configuration, detaching.\n", + name); + pci_free_consistent(pdev, sizeof(struct eata_config), + cf, cf_dma_addr); + goto freedma; + } + + } +#endif + + spin_unlock_irq(&driver_lock); + sh[j] = shost = scsi_register(tpnt, sizeof(struct hostdata)); + spin_lock_irq(&driver_lock); + + if (shost == NULL) { + printk("%s: unable to register host, detaching.\n", name); + goto freedma; + } + + shost->io_port = port_base; + shost->unique_id = port_base; + shost->n_io_port = REGION_SIZE; + shost->dma_channel = dma_channel; + shost->irq = irq; + shost->sg_tablesize = (ushort) info.scatt_size; + shost->this_id = (ushort) info.host_addr[3]; + shost->can_queue = (ushort) info.queue_size; + shost->cmd_per_lun = MAX_CMD_PER_LUN; + + ha = (struct hostdata *)shost->hostdata; + + memset(ha, 0, sizeof(struct hostdata)); + ha->subversion = subversion; + ha->protocol_rev = protocol_rev; + ha->is_pci = is_pci; + ha->pdev = pdev; + ha->board_number = j; + + if (ha->subversion == ESA) + shost->unchecked_isa_dma = 0; + else { + unsigned long flags; + shost->unchecked_isa_dma = 1; + + flags = claim_dma_lock(); + disable_dma(dma_channel); + clear_dma_ff(dma_channel); + set_dma_mode(dma_channel, DMA_MODE_CASCADE); + enable_dma(dma_channel); + release_dma_lock(flags); + + } + + strcpy(ha->board_name, name); + + /* DPT PM2012 does not allow to detect sg_tablesize correctly */ + if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) { + printk("%s: detect, wrong n. of SG lists %d, fixed.\n", + ha->board_name, shost->sg_tablesize); + shost->sg_tablesize = MAX_SGLIST; + } + + /* DPT PM2012 does not allow to detect can_queue correctly */ + if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) { + printk("%s: detect, wrong n. of mbox %d, fixed.\n", + ha->board_name, shost->can_queue); + shost->can_queue = MAX_MAILBOXES; + } + + if (protocol_rev != 'A') { + if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL) + shost->max_channel = info.max_chan; + + if (info.max_id > 7 && info.max_id < MAX_TARGET) + shost->max_id = info.max_id + 1; + + if (info.large_sg && shost->sg_tablesize == MAX_SGLIST) + shost->sg_tablesize = MAX_LARGE_SGLIST; + } + + if (protocol_rev == 'C') { + if (info.max_lun > 7 && info.max_lun < MAX_LUN) + shost->max_lun = info.max_lun + 1; + } + + if (dma_channel == NO_DMA) + sprintf(dma_name, "%s", "BMST"); + else + sprintf(dma_name, "DMA %u", dma_channel); + + spin_unlock_irq(&driver_lock); + + for (i = 0; i < shost->can_queue; i++) + ha->cp[i].cp_dma_addr = pci_map_single(ha->pdev, + &ha->cp[i], + sizeof(struct mscp), + PCI_DMA_BIDIRECTIONAL); + + for (i = 0; i < shost->can_queue; i++) { + size_t sz = shost->sg_tablesize *sizeof(struct sg_list); + unsigned int gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC; + ha->cp[i].sglist = kmalloc(sz, gfp_mask); + if (!ha->cp[i].sglist) { + printk + ("%s: kmalloc SGlist failed, mbox %d, detaching.\n", + ha->board_name, i); + goto release; + } + } + + if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev, + sizeof(struct mssp), + &ha->sp_dma_addr))) { + printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name); + goto release; + } + + if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN) + max_queue_depth = MAX_TAGGED_CMD_PER_LUN; + + if (max_queue_depth < MAX_CMD_PER_LUN) + max_queue_depth = MAX_CMD_PER_LUN; + + if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE) + tag_mode = TAG_ORDERED; + + if (j == 0) { + printk + ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n"); + printk + ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, " + "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode, + YESNO(linked_comm), max_queue_depth, YESNO(rev_scan), + YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe), + YESNO(pci_probe)); + } + + printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n", + ha->board_name, ha->protocol_rev, bus_type, + (unsigned long)shost->io_port, shost->irq, dma_name, + shost->sg_tablesize, shost->can_queue); + + if (shost->max_id > 8 || shost->max_lun > 8) + printk + ("%s: wide SCSI support enabled, max_id %u, max_lun %u.\n", + ha->board_name, shost->max_id, shost->max_lun); + + for (i = 0; i <= shost->max_channel; i++) + printk("%s: SCSI channel %u enabled, host target ID %d.\n", + ha->board_name, i, info.host_addr[3 - i]); + +#if defined(DEBUG_DETECT) + printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, " + "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version, + info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync, + info.second, info.data_len, info.cp_len, info.sp_len); + + if (protocol_rev == 'B' || protocol_rev == 'C') + printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, " + "large_sg %u, res1 %u.\n", name, info.isaena, + info.forcaddr, info.max_id, info.max_chan, info.large_sg, + info.res1); + + if (protocol_rev == 'C') + printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, " + "raidnum %u.\n", name, info.max_lun, info.m1, + info.idquest, info.pci, info.eisa, info.raidnum); +#endif + + if (ha->pdev) { + pci_set_master(ha->pdev); + if (pci_set_dma_mask(ha->pdev, 0xffffffff)) + printk("%s: warning, pci_set_dma_mask failed.\n", + ha->board_name); + } + + return 1; + + freedma: + if (subversion == ISA) + free_dma(dma_channel); + freeirq: + free_irq(irq, &sha[j]); + freelock: + spin_unlock_irq(&driver_lock); + release_region(port_base, REGION_SIZE); + fail: + return 0; + + release: + eata2x_release(shost); + return 0; +} + +static void internal_setup(char *str, int *ints) +{ + int i, argc = ints[0]; + char *cur = str, *pc; + + if (argc > 0) { + if (argc > MAX_INT_PARAM) + argc = MAX_INT_PARAM; + + for (i = 0; i < argc; i++) + io_port[i] = ints[i + 1]; + + io_port[i] = 0; + setup_done = 1; + } + + while (cur && (pc = strchr(cur, ':'))) { + int val = 0, c = *++pc; + + if (c == 'n' || c == 'N') + val = 0; + else if (c == 'y' || c == 'Y') + val = 1; + else + val = (int)simple_strtoul(pc, NULL, 0); + + if (!strncmp(cur, "lc:", 3)) + linked_comm = val; + else if (!strncmp(cur, "tm:", 3)) + tag_mode = val; + else if (!strncmp(cur, "tc:", 3)) + tag_mode = val; + else if (!strncmp(cur, "mq:", 3)) + max_queue_depth = val; + else if (!strncmp(cur, "ls:", 3)) + link_statistics = val; + else if (!strncmp(cur, "et:", 3)) + ext_tran = val; + else if (!strncmp(cur, "rs:", 3)) + rev_scan = val; + else if (!strncmp(cur, "ip:", 3)) + isa_probe = val; + else if (!strncmp(cur, "ep:", 3)) + eisa_probe = val; + else if (!strncmp(cur, "pp:", 3)) + pci_probe = val; + + if ((cur = strchr(cur, ','))) + ++cur; + } + + return; +} + +static int option_setup(char *str) +{ + int ints[MAX_INT_PARAM]; + char *cur = str; + int i = 1; + + while (cur && isdigit(*cur) && i <= MAX_INT_PARAM) { + ints[i++] = simple_strtoul(cur, NULL, 0); + + if ((cur = strchr(cur, ',')) != NULL) + cur++; + } + + ints[0] = i - 1; + internal_setup(cur, ints); + return 1; +} + +static void add_pci_ports(void) +{ +#if defined(CONFIG_PCI) + unsigned int addr, k; + struct pci_dev *dev = NULL; + + for (k = 0; k < MAX_PCI; k++) { + + if (!(dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) + break; + + if (pci_enable_device(dev)) { +#if defined(DEBUG_PCI_DETECT) + printk + ("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n", + driver_name, dev->bus->number, dev->devfn); +#endif + + continue; + } + + addr = pci_resource_start(dev, 0); + +#if defined(DEBUG_PCI_DETECT) + printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n", + driver_name, k, dev->bus->number, dev->devfn, addr); +#endif + + /* Order addresses according to rev_scan value */ + io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] = + addr + PCI_BASE_ADDRESS_0; + } + + pci_dev_put(dev); +#endif /* end CONFIG_PCI */ +} + +static int eata2x_detect(struct scsi_host_template *tpnt) +{ + unsigned int j = 0, k; + + tpnt->proc_name = "eata2x"; + + if (strlen(boot_options)) + option_setup(boot_options); + +#if defined(MODULE) + /* io_port could have been modified when loading as a module */ + if (io_port[0] != SKIP) { + setup_done = 1; + io_port[MAX_INT_PARAM] = 0; + } +#endif + + for (k = MAX_INT_PARAM; io_port[k]; k++) + if (io_port[k] == SKIP) + continue; + else if (io_port[k] <= MAX_ISA_ADDR) { + if (!isa_probe) + io_port[k] = SKIP; + } else if (io_port[k] >= MIN_EISA_ADDR + && io_port[k] <= MAX_EISA_ADDR) { + if (!eisa_probe) + io_port[k] = SKIP; + } + + if (pci_probe) { + if (!setup_done) + add_pci_ports(); + else + enable_pci_ports(); + } + + for (k = 0; io_port[k]; k++) { + + if (io_port[k] == SKIP) + continue; + + if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt)) + j++; + } + + num_boards = j; + return j; +} + +static void map_dma(unsigned int i, struct hostdata *ha) +{ + unsigned int k, count, pci_dir; + struct scatterlist *sgpnt; + struct mscp *cpp; + struct scsi_cmnd *SCpnt; + + cpp = &ha->cp[i]; + SCpnt = cpp->SCpnt; + pci_dir = SCpnt->sc_data_direction; + + if (SCpnt->sense_buffer) + cpp->sense_addr = + H2DEV(pci_map_single(ha->pdev, SCpnt->sense_buffer, + sizeof SCpnt->sense_buffer, PCI_DMA_FROMDEVICE)); + + cpp->sense_len = sizeof SCpnt->sense_buffer; + + if (!SCpnt->use_sg) { + + /* If we get here with PCI_DMA_NONE, pci_map_single triggers a BUG() */ + if (!SCpnt->request_bufflen) + pci_dir = PCI_DMA_BIDIRECTIONAL; + + if (SCpnt->request_buffer) + cpp->data_address = H2DEV(pci_map_single(ha->pdev, + SCpnt-> + request_buffer, + SCpnt-> + request_bufflen, + pci_dir)); + + cpp->data_len = H2DEV(SCpnt->request_bufflen); + return; + } + + sgpnt = (struct scatterlist *)SCpnt->request_buffer; + count = pci_map_sg(ha->pdev, sgpnt, SCpnt->use_sg, pci_dir); + + for (k = 0; k < count; k++) { + cpp->sglist[k].address = H2DEV(sg_dma_address(&sgpnt[k])); + cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(&sgpnt[k])); + } + + cpp->sg = 1; + cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist, + SCpnt->use_sg * + sizeof(struct sg_list), + pci_dir)); + cpp->data_len = H2DEV((SCpnt->use_sg * sizeof(struct sg_list))); +} + +static void unmap_dma(unsigned int i, struct hostdata *ha) +{ + unsigned int pci_dir; + struct mscp *cpp; + struct scsi_cmnd *SCpnt; + + cpp = &ha->cp[i]; + SCpnt = cpp->SCpnt; + pci_dir = SCpnt->sc_data_direction; + + if (DEV2H(cpp->sense_addr)) + pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr), + DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE); + + if (SCpnt->use_sg) + pci_unmap_sg(ha->pdev, SCpnt->request_buffer, SCpnt->use_sg, + pci_dir); + + if (!DEV2H(cpp->data_len)) + pci_dir = PCI_DMA_BIDIRECTIONAL; + + if (DEV2H(cpp->data_address)) + pci_unmap_single(ha->pdev, DEV2H(cpp->data_address), + DEV2H(cpp->data_len), pci_dir); +} + +static void sync_dma(unsigned int i, struct hostdata *ha) +{ + unsigned int pci_dir; + struct mscp *cpp; + struct scsi_cmnd *SCpnt; + + cpp = &ha->cp[i]; + SCpnt = cpp->SCpnt; + pci_dir = SCpnt->sc_data_direction; + + if (DEV2H(cpp->sense_addr)) + pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr), + DEV2H(cpp->sense_len), + PCI_DMA_FROMDEVICE); + + if (SCpnt->use_sg) + pci_dma_sync_sg_for_cpu(ha->pdev, SCpnt->request_buffer, + SCpnt->use_sg, pci_dir); + + if (!DEV2H(cpp->data_len)) + pci_dir = PCI_DMA_BIDIRECTIONAL; + + if (DEV2H(cpp->data_address)) + pci_dma_sync_single_for_cpu(ha->pdev, + DEV2H(cpp->data_address), + DEV2H(cpp->data_len), pci_dir); +} + +static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha) +{ + unsigned int k; + + static const unsigned char data_out_cmds[] = { + 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e, + 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40, + 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d + }; + + static const unsigned char data_none_cmds[] = { + 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e, + 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47, + 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00 + }; + + struct mscp *cpp; + struct scsi_cmnd *SCpnt; + + cpp = &ha->cp[i]; + SCpnt = cpp->SCpnt; + + if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) { + cpp->din = 1; + cpp->dout = 0; + return; + } else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) { + cpp->din = 0; + cpp->dout = 1; + return; + } else if (SCpnt->sc_data_direction == DMA_NONE) { + cpp->din = 0; + cpp->dout = 0; + return; + } + + if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL) + panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n", + ha->board_name); + + for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++) + if (SCpnt->cmnd[0] == data_out_cmds[k]) { + cpp->dout = 1; + break; + } + + if ((cpp->din = !cpp->dout)) + for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++) + if (SCpnt->cmnd[0] == data_none_cmds[k]) { + cpp->din = 0; + break; + } + +} + +static int eata2x_queuecommand(struct scsi_cmnd *SCpnt, + void (*done) (struct scsi_cmnd *)) +{ + struct Scsi_Host *shost = SCpnt->device->host; + struct hostdata *ha = (struct hostdata *)shost->hostdata; + unsigned int i, k; + struct mscp *cpp; + + if (SCpnt->host_scribble) + panic("%s: qcomm, pid %ld, SCpnt %p already active.\n", + ha->board_name, SCpnt->pid, SCpnt); + + /* i is the mailbox number, look for the first free mailbox + starting from last_cp_used */ + i = ha->last_cp_used + 1; + + for (k = 0; k < shost->can_queue; k++, i++) { + if (i >= shost->can_queue) + i = 0; + if (ha->cp_stat[i] == FREE) { + ha->last_cp_used = i; + break; + } + } + + if (k == shost->can_queue) { + printk("%s: qcomm, no free mailbox.\n", ha->board_name); + return 1; + } + + /* Set pointer to control packet structure */ + cpp = &ha->cp[i]; + + memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE); + + /* Set pointer to status packet structure, Big Endian format */ + cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr); + + SCpnt->scsi_done = done; + cpp->cpp_index = i; + SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index; + + if (do_trace) + printk("%s: qcomm, mbox %d, target %d.%d:%d, pid %ld.\n", + ha->board_name, i, SCpnt->device->channel, SCpnt->device->id, + SCpnt->device->lun, SCpnt->pid); + + cpp->reqsen = 1; + cpp->dispri = 1; +#if 0 + if (SCpnt->device->type == TYPE_TAPE) + cpp->hbaci = 1; +#endif + cpp->one = 1; + cpp->channel = SCpnt->device->channel; + cpp->target = SCpnt->device->id; + cpp->lun = SCpnt->device->lun; + cpp->SCpnt = SCpnt; + memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len); + + /* Use data transfer direction SCpnt->sc_data_direction */ + scsi_to_dev_dir(i, ha); + + /* Map DMA buffers and SG list */ + map_dma(i, ha); + + if (linked_comm && SCpnt->device->queue_depth > 2 + && TLDEV(SCpnt->device->type)) { + ha->cp_stat[i] = READY; + flush_dev(SCpnt->device, SCpnt->request->sector, ha, 0); + return 0; + } + + /* Send control packet to the board */ + if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) { + unmap_dma(i, ha); + SCpnt->host_scribble = NULL; + printk("%s: qcomm, target %d.%d:%d, pid %ld, adapter busy.\n", + ha->board_name, SCpnt->device->channel, SCpnt->device->id, + SCpnt->device->lun, SCpnt->pid); + return 1; + } + + ha->cp_stat[i] = IN_USE; + return 0; +} + +static int eata2x_eh_abort(struct scsi_cmnd *SCarg) +{ + struct Scsi_Host *shost = SCarg->device->host; + struct hostdata *ha = (struct hostdata *)shost->hostdata; + unsigned int i; + + if (SCarg->host_scribble == NULL) { + printk("%s: abort, target %d.%d:%d, pid %ld inactive.\n", + ha->board_name, SCarg->device->channel, SCarg->device->id, + SCarg->device->lun, SCarg->pid); + return SUCCESS; + } + + i = *(unsigned int *)SCarg->host_scribble; + printk("%s: abort, mbox %d, target %d.%d:%d, pid %ld.\n", + ha->board_name, i, SCarg->device->channel, SCarg->device->id, + SCarg->device->lun, SCarg->pid); + + if (i >= shost->can_queue) + panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name); + + if (wait_on_busy(shost->io_port, MAXLOOP)) { + printk("%s: abort, timeout error.\n", ha->board_name); + return FAILED; + } + + if (ha->cp_stat[i] == FREE) { + printk("%s: abort, mbox %d is free.\n", ha->board_name, i); + return SUCCESS; + } + + if (ha->cp_stat[i] == IN_USE) { + printk("%s: abort, mbox %d is in use.\n", ha->board_name, i); + + if (SCarg != ha->cp[i].SCpnt) + panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n", + ha->board_name, i, SCarg, ha->cp[i].SCpnt); + + if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED) + printk("%s: abort, mbox %d, interrupt pending.\n", + ha->board_name, i); + + if (SCarg->eh_state == SCSI_STATE_TIMEOUT) { + unmap_dma(i, ha); + SCarg->host_scribble = NULL; + ha->cp_stat[i] = FREE; + printk + ("%s, abort, mbox %d, eh_state timeout, pid %ld.\n", + ha->board_name, i, SCarg->pid); + return SUCCESS; + } + + return FAILED; + } + + if (ha->cp_stat[i] == IN_RESET) { + printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i); + return FAILED; + } + + if (ha->cp_stat[i] == LOCKED) { + printk("%s: abort, mbox %d is locked.\n", ha->board_name, i); + return SUCCESS; + } + + if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) { + unmap_dma(i, ha); + SCarg->result = DID_ABORT << 16; + SCarg->host_scribble = NULL; + ha->cp_stat[i] = FREE; + printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n", + ha->board_name, i, SCarg->pid); + SCarg->scsi_done(SCarg); + return SUCCESS; + } + + panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i); +} + +static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg) +{ + unsigned int i, time, k, c, limit = 0; + int arg_done = 0; + struct scsi_cmnd *SCpnt; + struct Scsi_Host *shost = SCarg->device->host; + struct hostdata *ha = (struct hostdata *)shost->hostdata; + + printk("%s: reset, enter, target %d.%d:%d, pid %ld.\n", + ha->board_name, SCarg->device->channel, SCarg->device->id, + SCarg->device->lun, SCarg->pid); + + if (SCarg->host_scribble == NULL) + printk("%s: reset, pid %ld inactive.\n", ha->board_name, SCarg->pid); + + if (ha->in_reset) { + printk("%s: reset, exit, already in reset.\n", ha->board_name); + return FAILED; + } + + if (wait_on_busy(shost->io_port, MAXLOOP)) { + printk("%s: reset, exit, timeout error.\n", ha->board_name); + return FAILED; + } + + ha->retries = 0; + + for (c = 0; c <= shost->max_channel; c++) + for (k = 0; k < shost->max_id; k++) { + ha->target_redo[k][c] = 1; + ha->target_to[k][c] = 0; + } + + for (i = 0; i < shost->can_queue; i++) { + + if (ha->cp_stat[i] == FREE) + continue; + + if (ha->cp_stat[i] == LOCKED) { + ha->cp_stat[i] = FREE; + printk("%s: reset, locked mbox %d forced free.\n", + ha->board_name, i); + continue; + } + + if (!(SCpnt = ha->cp[i].SCpnt)) + panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i); + + if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) { + ha->cp_stat[i] = ABORTING; + printk("%s: reset, mbox %d aborting, pid %ld.\n", + ha->board_name, i, SCpnt->pid); + } + + else { + ha->cp_stat[i] = IN_RESET; + printk("%s: reset, mbox %d in reset, pid %ld.\n", + ha->board_name, i, SCpnt->pid); + } + + if (SCpnt->host_scribble == NULL) + panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i); + + if (*(unsigned int *)SCpnt->host_scribble != i) + panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i); + + if (SCpnt->scsi_done == NULL) + panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", + ha->board_name, i); + + if (SCpnt == SCarg) + arg_done = 1; + } + + if (do_dma(shost->io_port, 0, RESET_PIO)) { + printk("%s: reset, cannot reset, timeout error.\n", ha->board_name); + return FAILED; + } + + printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name); + +#if defined(DEBUG_RESET) + do_trace = 1; +#endif + + ha->in_reset = 1; + + spin_unlock_irq(shost->host_lock); + time = jiffies; + while ((jiffies - time) < (10 * HZ) && limit++ < 200000) + udelay(100L); + spin_lock_irq(shost->host_lock); + + printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit); + + for (i = 0; i < shost->can_queue; i++) { + + if (ha->cp_stat[i] == IN_RESET) { + SCpnt = ha->cp[i].SCpnt; + unmap_dma(i, ha); + SCpnt->result = DID_RESET << 16; + SCpnt->host_scribble = NULL; + + /* This mailbox is still waiting for its interrupt */ + ha->cp_stat[i] = LOCKED; + + printk + ("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n", + ha->board_name, i, SCpnt->pid); + } + + else if (ha->cp_stat[i] == ABORTING) { + SCpnt = ha->cp[i].SCpnt; + unmap_dma(i, ha); + SCpnt->result = DID_RESET << 16; + SCpnt->host_scribble = NULL; + + /* This mailbox was never queued to the adapter */ + ha->cp_stat[i] = FREE; + + printk + ("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n", + ha->board_name, i, SCpnt->pid); + } + + else + /* Any other mailbox has already been set free by interrupt */ + continue; + + SCpnt->scsi_done(SCpnt); + } + + ha->in_reset = 0; + do_trace = 0; + + if (arg_done) + printk("%s: reset, exit, pid %ld done.\n", ha->board_name, SCarg->pid); + else + printk("%s: reset, exit.\n", ha->board_name); + + return SUCCESS; +} + +int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev, + sector_t capacity, int *dkinfo) +{ + unsigned int size = capacity; + + if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) { + dkinfo[0] = 255; + dkinfo[1] = 63; + dkinfo[2] = size / (dkinfo[0] * dkinfo[1]); + } +#if defined (DEBUG_GEOMETRY) + printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name, + dkinfo[0], dkinfo[1], dkinfo[2]); +#endif + + return 0; +} + +static void sort(unsigned long sk[], unsigned int da[], unsigned int n, + unsigned int rev) +{ + unsigned int i, j, k, y; + unsigned long x; + + for (i = 0; i < n - 1; i++) { + k = i; + + for (j = k + 1; j < n; j++) + if (rev) { + if (sk[j] > sk[k]) + k = j; + } else { + if (sk[j] < sk[k]) + k = j; + } + + if (k != i) { + x = sk[k]; + sk[k] = sk[i]; + sk[i] = x; + y = da[k]; + da[k] = da[i]; + da[i] = y; + } + } + + return; +} + +static int reorder(struct hostdata *ha, unsigned long cursec, + unsigned int ihdlr, unsigned int il[], unsigned int n_ready) +{ + struct scsi_cmnd *SCpnt; + struct mscp *cpp; + unsigned int k, n; + unsigned int rev = 0, s = 1, r = 1; + unsigned int input_only = 1, overlap = 0; + unsigned long sl[n_ready], pl[n_ready], ll[n_ready]; + unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0; + unsigned long ioseek = 0; + + static unsigned int flushcount = 0, batchcount = 0, sortcount = 0; + static unsigned int readycount = 0, ovlcount = 0, inputcount = 0; + static unsigned int readysorted = 0, revcount = 0; + static unsigned long seeksorted = 0, seeknosort = 0; + + if (link_statistics && !(++flushcount % link_statistics)) + printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d" + " av %ldK as %ldK.\n", flushcount, batchcount, + inputcount, ovlcount, readycount, readysorted, sortcount, + revcount, seeknosort / (readycount + 1), + seeksorted / (readycount + 1)); + + if (n_ready <= 1) + return 0; + + for (n = 0; n < n_ready; n++) { + k = il[n]; + cpp = &ha->cp[k]; + SCpnt = cpp->SCpnt; + + if (!cpp->din) + input_only = 0; + + if (SCpnt->request->sector < minsec) + minsec = SCpnt->request->sector; + if (SCpnt->request->sector > maxsec) + maxsec = SCpnt->request->sector; + + sl[n] = SCpnt->request->sector; + ioseek += SCpnt->request->nr_sectors; + + if (!n) + continue; + + if (sl[n] < sl[n - 1]) + s = 0; + if (sl[n] > sl[n - 1]) + r = 0; + + if (link_statistics) { + if (sl[n] > sl[n - 1]) + seek += sl[n] - sl[n - 1]; + else + seek += sl[n - 1] - sl[n]; + } + + } + + if (link_statistics) { + if (cursec > sl[0]) + seek += cursec - sl[0]; + else + seek += sl[0] - cursec; + } + + if (cursec > ((maxsec + minsec) / 2)) + rev = 1; + + if (ioseek > ((maxsec - minsec) / 2)) + rev = 0; + + if (!((rev && r) || (!rev && s))) + sort(sl, il, n_ready, rev); + + if (!input_only) + for (n = 0; n < n_ready; n++) { + k = il[n]; + cpp = &ha->cp[k]; + SCpnt = cpp->SCpnt; + ll[n] = SCpnt->request->nr_sectors; + pl[n] = SCpnt->pid; + + if (!n) + continue; + + if ((sl[n] == sl[n - 1]) + || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n])) + || (rev && ((sl[n] + ll[n]) > sl[n - 1]))) + overlap = 1; + } + + if (overlap) + sort(pl, il, n_ready, 0); + + if (link_statistics) { + if (cursec > sl[0]) + iseek = cursec - sl[0]; + else + iseek = sl[0] - cursec; + batchcount++; + readycount += n_ready; + seeknosort += seek / 1024; + if (input_only) + inputcount++; + if (overlap) { + ovlcount++; + seeksorted += iseek / 1024; + } else + seeksorted += (iseek + maxsec - minsec) / 1024; + if (rev && !r) { + revcount++; + readysorted += n_ready; + } + if (!rev && !s) { + sortcount++; + readysorted += n_ready; + } + } +#if defined(DEBUG_LINKED_COMMANDS) + if (link_statistics && (overlap || !(flushcount % link_statistics))) + for (n = 0; n < n_ready; n++) { + k = il[n]; + cpp = &ha->cp[k]; + SCpnt = cpp->SCpnt; + printk + ("%s %d.%d:%d pid %ld mb %d fc %d nr %d sec %ld ns %ld" + " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n", + (ihdlr ? "ihdlr" : "qcomm"), + SCpnt->device->channel, SCpnt->device->id, + SCpnt->device->lun, SCpnt->pid, k, flushcount, + n_ready, SCpnt->request->sector, + SCpnt->request->nr_sectors, cursec, YESNO(s), + YESNO(r), YESNO(rev), YESNO(input_only), + YESNO(overlap), cpp->din); + } +#endif + return overlap; +} + +static void flush_dev(struct scsi_device *dev, unsigned long cursec, + struct hostdata *ha, unsigned int ihdlr) +{ + struct scsi_cmnd *SCpnt; + struct mscp *cpp; + unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES]; + + for (k = 0; k < dev->host->can_queue; k++) { + + if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE) + continue; + + cpp = &ha->cp[k]; + SCpnt = cpp->SCpnt; + + if (SCpnt->device != dev) + continue; + + if (ha->cp_stat[k] == IN_USE) + return; + + il[n_ready++] = k; + } + + if (reorder(ha, cursec, ihdlr, il, n_ready)) + n_ready = 1; + + for (n = 0; n < n_ready; n++) { + k = il[n]; + cpp = &ha->cp[k]; + SCpnt = cpp->SCpnt; + + if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) { + printk + ("%s: %s, target %d.%d:%d, pid %ld, mbox %d, adapter" + " busy, will abort.\n", ha->board_name, + (ihdlr ? "ihdlr" : "qcomm"), + SCpnt->device->channel, SCpnt->device->id, + SCpnt->device->lun, SCpnt->pid, k); + ha->cp_stat[k] = ABORTING; + continue; + } + + ha->cp_stat[k] = IN_USE; + } +} + +static irqreturn_t ihdlr(int irq, struct Scsi_Host *shost) +{ + struct scsi_cmnd *SCpnt; + unsigned int i, k, c, status, tstatus, reg; + struct mssp *spp; + struct mscp *cpp; + struct hostdata *ha = (struct hostdata *)shost->hostdata; + + if (shost->irq != irq) + panic("%s: ihdlr, irq %d, shost->irq %d.\n", ha->board_name, irq, + shost->irq); + + /* Check if this board need to be serviced */ + if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)) + goto none; + + ha->iocount++; + + if (do_trace) + printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq, + ha->iocount); + + /* Check if this board is still busy */ + if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) { + reg = inb(shost->io_port + REG_STATUS); + printk + ("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n", + ha->board_name, irq, reg, ha->iocount); + goto none; + } + + spp = &ha->sp; + + /* Make a local copy just before clearing the interrupt indication */ + memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp)); + + /* Clear the completion flag and cp pointer on the dynamic copy of sp */ + memset(ha->sp_cpu_addr, 0, sizeof(struct mssp)); + + /* Read the status register to clear the interrupt indication */ + reg = inb(shost->io_port + REG_STATUS); + +#if defined (DEBUG_INTERRUPT) + { + unsigned char *bytesp; + int cnt; + bytesp = (unsigned char *)spp; + if (ha->iocount < 200) { + printk("sp[] ="); + for (cnt = 0; cnt < 15; cnt++) + printk(" 0x%x", bytesp[cnt]); + printk("\n"); + } + } +#endif + + /* Reject any sp with supspect data */ + if (spp->eoc == 0 && ha->iocount > 1) + printk + ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n", + ha->board_name, irq, reg, ha->iocount); + if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue) + printk + ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n", + ha->board_name, spp->cpp_index, irq, reg, ha->iocount); + if (spp->eoc == 0 || spp->cpp_index < 0 + || spp->cpp_index >= shost->can_queue) + goto handled; + + /* Find the mailbox to be serviced on this board */ + i = spp->cpp_index; + + cpp = &(ha->cp[i]); + +#if defined(DEBUG_GENERATE_ABORTS) + if ((ha->iocount > 500) && ((ha->iocount % 500) < 3)) + goto handled; +#endif + + if (ha->cp_stat[i] == IGNORE) { + ha->cp_stat[i] = FREE; + goto handled; + } else if (ha->cp_stat[i] == LOCKED) { + ha->cp_stat[i] = FREE; + printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i, + ha->iocount); + goto handled; + } else if (ha->cp_stat[i] == FREE) { + printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i, + ha->iocount); + goto handled; + } else if (ha->cp_stat[i] == IN_RESET) + printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i); + else if (ha->cp_stat[i] != IN_USE) + panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n", + ha->board_name, i, ha->cp_stat[i]); + + ha->cp_stat[i] = FREE; + SCpnt = cpp->SCpnt; + + if (SCpnt == NULL) + panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i); + + if (SCpnt->host_scribble == NULL) + panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n", ha->board_name, + i, SCpnt->pid, SCpnt); + + if (*(unsigned int *)SCpnt->host_scribble != i) + panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d.\n", + ha->board_name, i, SCpnt->pid, + *(unsigned int *)SCpnt->host_scribble); + + sync_dma(i, ha); + + if (linked_comm && SCpnt->device->queue_depth > 2 + && TLDEV(SCpnt->device->type)) + flush_dev(SCpnt->device, SCpnt->request->sector, ha, 1); + + tstatus = status_byte(spp->target_status); + +#if defined(DEBUG_GENERATE_ERRORS) + if ((ha->iocount > 500) && ((ha->iocount % 200) < 2)) + spp->adapter_status = 0x01; +#endif + + switch (spp->adapter_status) { + case ASOK: /* status OK */ + + /* Forces a reset if a disk drive keeps returning BUSY */ + if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE) + status = DID_ERROR << 16; + + /* If there was a bus reset, redo operation on each target */ + else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK + && ha->target_redo[SCpnt->device->id][SCpnt-> + device-> + channel]) + status = DID_BUS_BUSY << 16; + + /* Works around a flaw in scsi.c */ + else if (tstatus == CHECK_CONDITION + && SCpnt->device->type == TYPE_DISK + && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR) + status = DID_BUS_BUSY << 16; + + else + status = DID_OK << 16; + + if (tstatus == GOOD) + ha->target_redo[SCpnt->device->id][SCpnt->device-> + channel] = 0; + + if (spp->target_status && SCpnt->device->type == TYPE_DISK && + (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 && + (SCpnt->sense_buffer[2] & 0xf) == NOT_READY))) + printk("%s: ihdlr, target %d.%d:%d, pid %ld, " + "target_status 0x%x, sense key 0x%x.\n", + ha->board_name, + SCpnt->device->channel, SCpnt->device->id, + SCpnt->device->lun, SCpnt->pid, + spp->target_status, SCpnt->sense_buffer[2]); + + ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0; + + if (ha->last_retried_pid == SCpnt->pid) + ha->retries = 0; + + break; + case ASST: /* Selection Time Out */ + case 0x02: /* Command Time Out */ + + if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1) + status = DID_ERROR << 16; + else { + status = DID_TIME_OUT << 16; + ha->target_to[SCpnt->device->id][SCpnt->device-> + channel]++; + } + + break; + + /* Perform a limited number of internal retries */ + case 0x03: /* SCSI Bus Reset Received */ + case 0x04: /* Initial Controller Power-up */ + + for (c = 0; c <= shost->max_channel; c++) + for (k = 0; k < shost->max_id; k++) + ha->target_redo[k][c] = 1; + + if (SCpnt->device->type != TYPE_TAPE + && ha->retries < MAX_INTERNAL_RETRIES) { + +#if defined(DID_SOFT_ERROR) + status = DID_SOFT_ERROR << 16; +#else + status = DID_BUS_BUSY << 16; +#endif + + ha->retries++; + ha->last_retried_pid = SCpnt->pid; + } else + status = DID_ERROR << 16; + + break; + case 0x05: /* Unexpected Bus Phase */ + case 0x06: /* Unexpected Bus Free */ + case 0x07: /* Bus Parity Error */ + case 0x08: /* SCSI Hung */ + case 0x09: /* Unexpected Message Reject */ + case 0x0a: /* SCSI Bus Reset Stuck */ + case 0x0b: /* Auto Request-Sense Failed */ + case 0x0c: /* Controller Ram Parity Error */ + default: + status = DID_ERROR << 16; + break; + } + + SCpnt->result = status | spp->target_status; + +#if defined(DEBUG_INTERRUPT) + if (SCpnt->result || do_trace) +#else + if ((spp->adapter_status != ASOK && ha->iocount > 1000) || + (spp->adapter_status != ASOK && + spp->adapter_status != ASST && ha->iocount <= 1000) || + do_trace || msg_byte(spp->target_status)) +#endif + printk("%s: ihdlr, mbox %2d, err 0x%x:%x," + " target %d.%d:%d, pid %ld, reg 0x%x, count %d.\n", + ha->board_name, i, spp->adapter_status, spp->target_status, + SCpnt->device->channel, SCpnt->device->id, + SCpnt->device->lun, SCpnt->pid, reg, ha->iocount); + + unmap_dma(i, ha); + + /* Set the command state to inactive */ + SCpnt->host_scribble = NULL; + + SCpnt->scsi_done(SCpnt); + + if (do_trace) + printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name, + irq, ha->iocount); + + handled: + return IRQ_HANDLED; + none: + return IRQ_NONE; +} + +static irqreturn_t do_interrupt_handler(int irq, void *shap, + struct pt_regs *regs) +{ + struct Scsi_Host *shost; + unsigned int j; + unsigned long spin_flags; + irqreturn_t ret; + + /* Check if the interrupt must be processed by this handler */ + if ((j = (unsigned int)((char *)shap - sha)) >= num_boards) + return IRQ_NONE; + shost = sh[j]; + + spin_lock_irqsave(shost->host_lock, spin_flags); + ret = ihdlr(irq, shost); + spin_unlock_irqrestore(shost->host_lock, spin_flags); + return ret; +} + +static int eata2x_release(struct Scsi_Host *shost) +{ + struct hostdata *ha = (struct hostdata *)shost->hostdata; + unsigned int i; + + for (i = 0; i < shost->can_queue; i++) + if ((&ha->cp[i])->sglist) + kfree((&ha->cp[i])->sglist); + + for (i = 0; i < shost->can_queue; i++) + pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr, + sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL); + + if (ha->sp_cpu_addr) + pci_free_consistent(ha->pdev, sizeof(struct mssp), + ha->sp_cpu_addr, ha->sp_dma_addr); + + free_irq(shost->irq, &sha[ha->board_number]); + + if (shost->dma_channel != NO_DMA) + free_dma(shost->dma_channel); + + release_region(shost->io_port, shost->n_io_port); + scsi_unregister(shost); + return 0; +} + +#include "scsi_module.c" + +#ifndef MODULE +__setup("eata=", option_setup); +#endif /* end MODULE */ |