diff options
Diffstat (limited to 'linux/src/drivers/scsi/eata.c')
| -rw-r--r-- | linux/src/drivers/scsi/eata.c | 2329 |
1 files changed, 2329 insertions, 0 deletions
diff --git a/linux/src/drivers/scsi/eata.c b/linux/src/drivers/scsi/eata.c new file mode 100644 index 0000000..8d7ba08 --- /dev/null +++ b/linux/src/drivers/scsi/eata.c @@ -0,0 +1,2329 @@ +/* + * eata.c - Low-level driver for EATA/DMA SCSI host adapters. + * + * 26 Jul 1998 Rev. 4.33 for linux 2.0.35 and 2.1.111 + * + Added command line option (rs:[y|n]) to reverse the scan order + * of PCI boards. The default is rs:y, which reverses the BIOS order + * while registering PCI boards. The default value rs:y generates + * the same order of all previous revisions of this driver. + * Pls. note that "BIOS order" might have been reversed itself + * after the 2.1.9x PCI modifications in the linux kernel. + * The rs value is ignored when the explicit list of addresses + * is used by the "eata=port0,port1,..." command line option. + * + Added command line option (et:[y|n]) to force use of extended + * translation (255 heads, 63 sectors) as disk geometry. + * The default is et:n, which uses the disk geometry returned + * by scsicam_bios_param. The default value et:n is compatible with + * all previous revisions of this driver. + * + * 28 May 1998 Rev. 4.32 for linux 2.0.33 and 2.1.104 + * Increased busy timeout from 10 msec. to 200 msec. while + * processing interrupts. + * + * 16 May 1998 Rev. 4.31 for linux 2.0.33 and 2.1.102 + * Improved abort handling during the eh recovery process. + * + * 13 May 1998 Rev. 4.30 for linux 2.0.33 and 2.1.101 + * The driver is now fully SMP safe, including the + * abort and reset routines. + * Added command line options (eh:[y|n]) to choose between + * new_eh_code and the old scsi code. + * If linux version >= 2.1.101 the default is eh:y, while the eh + * option is ignored for previous releases and the old scsi code + * is used. + * + * 18 Apr 1998 Rev. 4.20 for linux 2.0.33 and 2.1.97 + * Reworked interrupt handler. + * + * 11 Apr 1998 rev. 4.05 for linux 2.0.33 and 2.1.95 + * Major reliability improvement: when a batch with overlapping + * requests is detected, requests are queued one at a time + * eliminating any possible board or drive reordering. + * + * 10 Apr 1998 rev. 4.04 for linux 2.0.33 and 2.1.95 + * Improved SMP support (if linux version >= 2.1.95). + * + * 9 Apr 1998 rev. 4.03 for linux 2.0.33 and 2.1.94 + * Added support for new PCI code and IO-APIC remapping of irqs. + * Performance improvement: when sequential i/o is detected, + * always use direct sort instead of reverse sort. + * + * 4 Apr 1998 rev. 4.02 for linux 2.0.33 and 2.1.92 + * io_port is now unsigned long. + * + * 17 Mar 1998 rev. 4.01 for linux 2.0.33 and 2.1.88 + * Use new scsi error handling code (if linux version >= 2.1.88). + * Use new interrupt code. + * + * 12 Sep 1997 rev. 3.11 for linux 2.0.30 and 2.1.55 + * Use of udelay inside the wait loops to avoid timeout + * problems with fast cpus. + * Removed check about useless calls to the interrupt service + * routine (reported on SMP systems only). + * At initialization time "sorted/unsorted" is displayed instead + * of "linked/unlinked" to reinforce the fact that "linking" is + * nothing but "elevator sorting" in the actual implementation. + * + * 17 May 1997 rev. 3.10 for linux 2.0.30 and 2.1.38 + * Use of serial_number_at_timeout in abort and reset processing. + * Use of the __initfunc and __initdata macro in setup code. + * Minor cleanups in the list_statistics code. + * Increased controller busy timeout in order to better support + * slow SCSI devices. + * + * 24 Feb 1997 rev. 3.00 for linux 2.0.29 and 2.1.26 + * When loading as a module, parameter passing is now supported + * both in 2.0 and in 2.1 style. + * Fixed data transfer direction for some SCSI opcodes. + * Immediate acknowledge to request sense commands. + * Linked commands to each disk device are now reordered by elevator + * sorting. Rare cases in which reordering of write requests could + * cause wrong results are managed. + * Fixed spurious timeouts caused by long simple queue tag sequences. + * New command line option (tm:[0-3]) to choose the type of tags: + * 0 -> mixed (default); 1 -> simple; 2 -> head; 3 -> ordered. + * + * 18 Jan 1997 rev. 2.60 for linux 2.1.21 and 2.0.28 + * Added command line options to enable/disable linked commands + * (lc:[y|n]), tagged commands (tc:[y|n]) and to set the max queue + * depth (mq:xx). Default is "eata=lc:n,tc:n,mq:16". + * Improved command linking. + * Documented how to setup RAID-0 with DPT SmartRAID boards. + * + * 8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27 + * Added linked command support. + * Improved detection of PCI boards using ISA base addresses. + * + * 3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27 + * Added support for tagged commands and queue depth adjustment. + * + * 22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26 + * When CONFIG_PCI is defined, BIOS32 is used to include in the + * list of i/o ports to be probed all the PCI SCSI controllers. + * The list of i/o ports to be probed can be overwritten by the + * "eata=port0,port1,...." boot command line option. + * Scatter/gather lists are now allocated by a number of kmalloc + * calls, in order to avoid the previous size limit of 64Kb. + * + * 16 Nov 1996 rev. 2.20 for linux 2.1.10 and 2.0.25 + * Added support for EATA 2.0C, PCI, multichannel and wide SCSI. + * + * 27 Sep 1996 rev. 2.12 for linux 2.1.0 + * Portability cleanups (virtual/bus addressing, little/big endian + * support). + * + * 09 Jul 1996 rev. 2.11 for linux 2.0.4 + * Number of internal retries is now limited. + * + * 16 Apr 1996 rev. 2.10 for linux 1.3.90 + * New argument "reset_flags" to the reset routine. + * + * 6 Jul 1995 rev. 2.01 for linux 1.3.7 + * Update required by the new /proc/scsi support. + * + * 11 Mar 1995 rev. 2.00 for linux 1.2.0 + * Fixed a bug which prevented media change detection for removable + * disk drives. + * + * 23 Feb 1995 rev. 1.18 for linux 1.1.94 + * Added a check for scsi_register returning NULL. + * + * 11 Feb 1995 rev. 1.17 for linux 1.1.91 + * Now DEBUG_RESET is disabled by default. + * Register a board even if it does not assert DMA protocol support + * (DPT SK2011B does not report correctly the dmasup bit). + * + * 9 Feb 1995 rev. 1.16 for linux 1.1.90 + * Use host->wish_block instead of host->block. + * New list of Data Out SCSI commands. + * + * 8 Feb 1995 rev. 1.15 for linux 1.1.89 + * Cleared target_time_out counter while performing a reset. + * All external symbols renamed to avoid possible name conflicts. + * + * 28 Jan 1995 rev. 1.14 for linux 1.1.86 + * Added module support. + * Log and do a retry when a disk drive returns a target status + * different from zero on a recovered error. + * + * 24 Jan 1995 rev. 1.13 for linux 1.1.85 + * Use optimized board configuration, with a measured performance + * increase in the range 10%-20% on i/o throughput. + * + * 16 Jan 1995 rev. 1.12 for linux 1.1.81 + * Fix mscp structure comments (no functional change). + * Display a message if check_region detects a port address + * already in use. + * + * 17 Dec 1994 rev. 1.11 for linux 1.1.74 + * Use the scsicam_bios_param routine. This allows an easy + * migration path from disk partition tables created using + * different SCSI drivers and non optimal disk geometry. + * + * 15 Dec 1994 rev. 1.10 for linux 1.1.74 + * Added support for ISA EATA boards (DPT PM2011, DPT PM2021). + * The host->block flag is set for all the detected ISA boards. + * The detect routine no longer enforces LEVEL triggering + * for EISA boards, it just prints a warning message. + * + * 30 Nov 1994 rev. 1.09 for linux 1.1.68 + * Redo i/o on target status CHECK_CONDITION for TYPE_DISK only. + * Added optional support for using a single board at a time. + * + * 18 Nov 1994 rev. 1.08 for linux 1.1.64 + * Forces sg_tablesize = 64 and can_queue = 64 if these + * values are not correctly detected (DPT PM2012). + * + * 14 Nov 1994 rev. 1.07 for linux 1.1.63 Final BETA release. + * 04 Aug 1994 rev. 1.00 for linux 1.1.39 First BETA release. + * + * + * This driver is based on the CAM (Common Access Method Committee) + * EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol. + * + * Copyright (C) 1994-1998 Dario Ballabio (dario@milano.europe.dg.com) + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that redistributions of source + * code retain the above copyright notice and this comment without + * modification. + * + */ + +/* + * + * Here is a brief description of the DPT SCSI host adapters. + * All these boards provide an EATA/DMA compatible programming interface + * and are fully supported by this driver in any configuration, including + * multiple SCSI channels: + * + * PM2011B/9X - Entry Level ISA + * PM2021A/9X - High Performance ISA + * PM2012A Old EISA + * PM2012B Old EISA + * PM2022A/9X - Entry Level EISA + * PM2122A/9X - High Performance EISA + * PM2322A/9X - Extra High Performance EISA + * PM3021 - SmartRAID Adapter for ISA + * PM3222 - SmartRAID Adapter for EISA (PM3222W is 16-bit wide SCSI) + * PM3224 - SmartRAID Adapter for PCI (PM3224W is 16-bit wide SCSI) + * + * The above list is just an indication: as a matter of fact all DPT + * boards using the EATA/DMA protocol are supported by this driver, + * since they use exactely the same programming interface. + * + * The DPT PM2001 provides only the EATA/PIO interface and hence is not + * supported by this driver. + * + * This code has been tested with up to 3 Distributed Processing Technology + * PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) EISA controllers, + * in any combination of private and shared IRQ. + * PCI support has been tested using up to 2 DPT PM3224W (DPT SCSI BIOS + * v003.D0, firmware v07G.0). + * + * DPT SmartRAID boards support "Hardware Array" - a group of disk drives + * which are all members of the same RAID-0, RAID-1 or RAID-5 array implemented + * in host adapter hardware. Hardware Arrays are fully compatible with this + * driver, since they look to it as a single disk drive. + * + * WARNING: to create a RAID-0 "Hardware Array" you must select "Other Unix" + * as the current OS in the DPTMGR "Initial System Installation" menu. + * Otherwise RAID-0 is generated as an "Array Group" (i.e. software RAID-0), + * which is not supported by the actual SCSI subsystem. + * To get the "Array Group" functionality, the Linux MD driver must be used + * instead of the DPT "Array Group" feature. + * + * Multiple ISA, EISA and PCI boards can be configured in the same system. + * It is suggested to put all the EISA boards on the same IRQ level, all + * the PCI boards on another IRQ level, while ISA boards cannot share + * interrupts. + * + * If you configure multiple boards on the same IRQ, the interrupt must + * be _level_ triggered (not _edge_ triggered). + * + * This driver detects EATA boards by probes at fixed port addresses, + * so no BIOS32 or PCI BIOS support is required. + * The suggested way to detect a generic EATA PCI board is to force on it + * any unused EISA address, even if there are other controllers on the EISA + * bus, or even if you system has no EISA bus at all. + * Do not force any ISA address on EATA PCI boards. + * + * If PCI bios support is configured into the kernel, BIOS32 is used to + * include in the list of i/o ports to be probed all the PCI SCSI controllers. + * + * Due to a DPT BIOS "feature", it might not be possible to force an EISA + * address on more then a single DPT PCI board, so in this case you have to + * let the PCI BIOS assign the addresses. + * + * The sequence of detection probes is: + * + * - ISA 0x1F0; + * - PCI SCSI controllers (only if BIOS32 is available); + * - EISA/PCI 0x1C88 through 0xFC88 (corresponding to EISA slots 1 to 15); + * - ISA 0x170, 0x230, 0x330. + * + * The above list of detection probes can be totally replaced by the + * boot command line option: "eata=port0,port1,port2,...", where the + * port0, port1... arguments are ISA/EISA/PCI addresses to be probed. + * For example using "eata=0x7410,0x7450,0x230", the driver probes + * only the two PCI addresses 0x7410 and 0x7450 and the ISA address 0x230, + * in this order; "eata=0" totally disables this driver. + * + * After the optional list of detection probes, other possible command line + * options are: + * + * eh:y use new scsi code (linux 2.2 only); + * eh:n use old scsi code; + * et:y force use of extended translation (255 heads, 63 sectors); + * et:n use disk geometry detected by scsicam_bios_param; + * rs:y reverse scan order while detecting PCI boards; + * rs:n use BIOS order while detecting PCI boards; + * lc:y enables linked commands; + * lc:n disables linked commands; + * tc:y enables tagged commands; + * tc:n disables tagged commands; + * tm:0 use head/simple/ordered queue tag sequences; + * tm:1 use only simple queue tags; + * tm:2 use only head of queue tags; + * tm:3 use only ordered queue tags; + * mq:xx set the max queue depth to the value xx (2 <= xx <= 32). + * + * The default value is: "eata=lc:n,tc:n,mq:16,tm:0,et:n,rs:n". + * An example using the list of detection probes could be: + * "eata=0x7410,0x230,lc:y,tc:n,mq:4,eh:n,et:n". + * + * When loading as a module, parameters can be specified as well. + * The above example would be (use 1 in place of y and 0 in place of n): + * + * modprobe eata io_port=0x7410,0x230 linked_comm=1 tagged_comm=0 \ + * max_queue_depth=4 tag_mode=0 use_new_eh_code=0 \ + * ext_tran=0 rev_scan=1 + * + * ---------------------------------------------------------------------------- + * In this implementation, linked commands are designed to work with any DISK + * or CD-ROM, since this linking has only the intent of clustering (time-wise) + * and reordering by elevator sorting commands directed to each device, + * without any relation with the actual SCSI protocol between the controller + * and the device. + * If Q is the queue depth reported at boot time for each device (also named + * cmds/lun) and Q > 2, whenever there is already an active command to the + * device all other commands to the same device (up to Q-1) are kept waiting + * in the elevator sorting queue. When the active command completes, the + * commands in this queue are sorted by sector address. The sort is chosen + * between increasing or decreasing by minimizing the seek distance between + * the sector of the commands just completed and the sector of the first + * command in the list to be sorted. + * Trivial math assures that the unsorted average seek distance when doing + * random seeks over S sectors is S/3. + * When (Q-1) requests are uniformly distributed over S sectors, the average + * distance between two adjacent requests is S/((Q-1) + 1), so the sorted + * average seek distance for (Q-1) random requests over S sectors is S/Q. + * The elevator sorting hence divides the seek distance by a factor Q/3. + * The above pure geometric remarks are valid in all cases and the + * driver effectively reduces the seek distance by the predicted factor + * when there are Q concurrent read i/o operations on the device, but this + * does not necessarily results in a noticeable performance improvement: + * your mileage may vary.... + * + * Note: command reordering inside a batch of queued commands could cause + * wrong results only if there is at least one write request and the + * intersection (sector-wise) of all requests is not empty. + * When the driver detects a batch including overlapping requests + * (a really rare event) strict serial (pid) order is enforced. + * ---------------------------------------------------------------------------- + * The extended translation option (et:y) is useful when using large physical + * disks/arrays. It could also be useful when switching between Adaptec boards + * and DPT boards without reformatting the disk. + * When a boot disk is partitioned with extended translation, in order to + * be able to boot it with a DPT board is could be necessary to add to + * lilo.conf additional commands as in the following example: + * + * fix-table + * disk=/dev/sda bios=0x80 sectors=63 heads=128 cylindres=546 + * + * where the above geometry should be replaced with the one reported at + * power up by the DPT controller. + * ---------------------------------------------------------------------------- + * + * The boards are named EATA0, EATA1,... according to the detection order. + * + * In order to support multiple ISA boards in a reliable way, + * the driver sets host->wish_block = TRUE for all ISA boards. + */ + +#include <linux/version.h> + +#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s)) +#define MAX_INT_PARAM 10 + +#if defined(MODULE) +#include <linux/module.h> + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,26) +MODULE_PARM(io_port, "1-" __MODULE_STRING(MAX_INT_PARAM) "i"); +MODULE_PARM(linked_comm, "i"); +MODULE_PARM(tagged_comm, "i"); +MODULE_PARM(link_statistics, "i"); +MODULE_PARM(max_queue_depth, "i"); +MODULE_PARM(tag_mode, "i"); +MODULE_PARM(use_new_eh_code, "i"); +MODULE_PARM(ext_tran, "i"); +MODULE_PARM(rev_scan, "i"); +MODULE_AUTHOR("Dario Ballabio"); +#endif + +#endif + +#include <linux/string.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <asm/io.h> +#include <asm/system.h> +#include <asm/byteorder.h> +#include <linux/proc_fs.h> +#include <linux/blk.h> +#include "scsi.h" +#include "hosts.h" +#include "sd.h" +#include <asm/dma.h> +#include <asm/irq.h> +#include "eata.h" +#include <linux/stat.h> +#include <linux/config.h> +#include <linux/pci.h> + +#if LINUX_VERSION_CODE < LinuxVersionCode(2,1,93) +#include <linux/bios32.h> +#endif + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,36) +#include <linux/init.h> +#else +#define __initfunc(A) A +#define __initdata +#define __init +#endif + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101) +#include <asm/spinlock.h> +#define IRQ_FLAGS +#define IRQ_LOCK +#define IRQ_LOCK_SAVE +#define IRQ_UNLOCK +#define IRQ_UNLOCK_RESTORE +#define SPIN_FLAGS unsigned long spin_flags; +#define SPIN_LOCK spin_lock_irq(&io_request_lock); +#define SPIN_LOCK_SAVE spin_lock_irqsave(&io_request_lock, spin_flags); +#define SPIN_UNLOCK spin_unlock_irq(&io_request_lock); +#define SPIN_UNLOCK_RESTORE \ + spin_unlock_irqrestore(&io_request_lock, spin_flags); +static int use_new_eh_code = TRUE; +#else +#define IRQ_FLAGS unsigned long irq_flags; +#define IRQ_LOCK cli(); +#define IRQ_LOCK_SAVE do {save_flags(irq_flags); cli();} while (0); +#define IRQ_UNLOCK sti(); +#define IRQ_UNLOCK_RESTORE do {restore_flags(irq_flags);} while (0); +#define SPIN_FLAGS +#define SPIN_LOCK +#define SPIN_LOCK_SAVE +#define SPIN_UNLOCK +#define SPIN_UNLOCK_RESTORE +static int use_new_eh_code = FALSE; +#endif + +struct proc_dir_entry proc_scsi_eata2x = { + PROC_SCSI_EATA2X, 6, "eata2x", + S_IFDIR | S_IRUGO | S_IXUGO, 2 +}; + +/* Subversion values */ +#define ISA 0 +#define ESA 1 + +#undef FORCE_CONFIG + +#undef DEBUG_LINKED_COMMANDS +#undef DEBUG_DETECT +#undef DEBUG_PCI_DETECT +#undef DEBUG_INTERRUPT +#undef DEBUG_RESET +#undef DEBUG_GENERATE_ERRORS +#undef DEBUG_GENERATE_ABORTS +#undef DEBUG_GEOMETRY + +#define MAX_ISA 4 +#define MAX_VESA 0 +#define MAX_EISA 15 +#define MAX_PCI 16 +#define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI) +#define MAX_CHANNEL 4 +#define MAX_LUN 32 +#define MAX_TARGET 32 +#define MAX_MAILBOXES 64 +#define MAX_SGLIST 64 +#define MAX_LARGE_SGLIST 122 +#define MAX_INTERNAL_RETRIES 64 +#define MAX_CMD_PER_LUN 2 +#define MAX_TAGGED_CMD_PER_LUN (MAX_MAILBOXES - MAX_CMD_PER_LUN) + +#define SKIP ULONG_MAX +#define FALSE 0 +#define TRUE 1 +#define FREE 0 +#define IN_USE 1 +#define LOCKED 2 +#define IN_RESET 3 +#define IGNORE 4 +#define READY 5 +#define ABORTING 6 +#define NO_DMA 0xff +#define MAXLOOP 10000 +#define TAG_MIXED 0 +#define TAG_SIMPLE 1 +#define TAG_HEAD 2 +#define TAG_ORDERED 3 + +#define REG_CMD 7 +#define REG_STATUS 7 +#define REG_AUX_STATUS 8 +#define REG_DATA 0 +#define REG_DATA2 1 +#define REG_SEE 6 +#define REG_LOW 2 +#define REG_LM 3 +#define REG_MID 4 +#define REG_MSB 5 +#define REGION_SIZE 9 +#define MAX_ISA_ADDR 0x03ff +#define MIN_EISA_ADDR 0x1c88 +#define MAX_EISA_ADDR 0xfc88 +#define BSY_ASSERTED 0x80 +#define DRQ_ASSERTED 0x08 +#define ABSY_ASSERTED 0x01 +#define IRQ_ASSERTED 0x02 +#define READ_CONFIG_PIO 0xf0 +#define SET_CONFIG_PIO 0xf1 +#define SEND_CP_PIO 0xf2 +#define RECEIVE_SP_PIO 0xf3 +#define TRUNCATE_XFR_PIO 0xf4 +#define RESET_PIO 0xf9 +#define READ_CONFIG_DMA 0xfd +#define SET_CONFIG_DMA 0xfe +#define SEND_CP_DMA 0xff +#define ASOK 0x00 +#define ASST 0x01 + +#define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr)[0]) +#define YESNO(a) ((a) ? 'y' : 'n') +#define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM) + +/* "EATA", in Big Endian format */ +#define EATA_SIGNATURE 0x41544145 + +/* Number of valid bytes in the board config structure for EATA 2.0x */ +#define EATA_2_0A_SIZE 28 +#define EATA_2_0B_SIZE 30 +#define EATA_2_0C_SIZE 34 + +/* Board info structure */ +struct eata_info { + ulong data_len; /* Number of valid bytes after this field */ + ulong sign; /* ASCII "EATA" signature */ + unchar :4, /* unused low nibble */ + version:4; /* EATA version, should be 0x1 */ + unchar ocsena:1, /* Overlap Command Support Enabled */ + tarsup:1, /* Target Mode Supported */ + trnxfr:1, /* Truncate Transfer Cmd NOT Necessary */ + morsup:1, /* More Supported */ + dmasup:1, /* DMA Supported */ + drqvld:1, /* DRQ Index (DRQX) is valid */ + ata:1, /* This is an ATA device */ + haaval:1; /* Host Adapter Address Valid */ + ushort cp_pad_len; /* Number of pad bytes after cp_len */ + unchar host_addr[4]; /* Host Adapter SCSI ID for channels 3, 2, 1, 0 */ + ulong cp_len; /* Number of valid bytes in cp */ + ulong sp_len; /* Number of valid bytes in sp */ + ushort queue_size; /* Max number of cp that can be queued */ + ushort unused; + ushort scatt_size; /* Max number of entries in scatter/gather table */ + unchar irq:4, /* Interrupt Request assigned to this controller */ + irq_tr:1, /* 0 for edge triggered, 1 for level triggered */ + second:1, /* 1 if this is a secondary (not primary) controller */ + drqx:2; /* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */ + unchar sync; /* 1 if scsi target id 7...0 is running sync scsi */ + + /* Structure extension defined in EATA 2.0B */ + unchar isaena:1, /* ISA i/o addressing is disabled/enabled */ + forcaddr:1, /* Port address has been forced */ + large_sg:1, /* 1 if large SG lists are supported */ + res1:1, + :4; + unchar max_id:5, /* Max SCSI target ID number */ + max_chan:3; /* Max SCSI channel number on this board */ + + /* Structure extension defined in EATA 2.0C */ + unchar max_lun; /* Max SCSI LUN number */ + unchar :4, + m1:1, /* This is a PCI with an M1 chip installed */ + idquest:1, /* RAIDNUM returned is questionable */ + pci:1, /* This board is PCI */ + eisa:1; /* This board is EISA */ + unchar raidnum; /* Uniquely identifies this HBA in a system */ + unchar notused; + + ushort ipad[247]; + }; + +/* Board config structure */ +struct eata_config { + ushort len; /* Number of bytes following this field */ + unchar edis:1, /* Disable EATA interface after config command */ + ocena:1, /* Overlapped Commands Enabled */ + mdpena:1, /* Transfer all Modified Data Pointer Messages */ + tarena:1, /* Target Mode Enabled for this controller */ + :4; + unchar cpad[511]; + }; + +/* Returned status packet structure */ +struct mssp { + unchar adapter_status:7, /* State related to current command */ + eoc:1; /* End Of Command (1 = command completed) */ + unchar target_status; /* SCSI status received after data transfer */ + unchar unused[2]; + ulong inv_res_len; /* Number of bytes not transferred */ + struct mscp *cpp; /* Address set in cp */ + char mess[12]; + }; + +struct sg_list { + unsigned int address; /* Segment Address */ + unsigned int num_bytes; /* Segment Length */ + }; + +/* MailBox SCSI Command Packet */ +struct mscp { + unchar sreset:1, /* SCSI Bus Reset Signal should be asserted */ + init:1, /* Re-initialize controller and self test */ + reqsen:1, /* Transfer Request Sense Data to addr using DMA */ + sg:1, /* Use Scatter/Gather */ + :1, + interp:1, /* The controller interprets cp, not the target */ + dout:1, /* Direction of Transfer is Out (Host to Target) */ + din:1; /* Direction of Transfer is In (Target to Host) */ + unchar sense_len; /* Request Sense Length */ + unchar unused[3]; + unchar fwnest:1, /* Send command to a component of an Array Group */ + :7; + unchar phsunit:1, /* Send to Target Physical Unit (bypass RAID) */ + iat:1, /* Inhibit Address Translation */ + hbaci:1, /* Inhibit HBA Caching for this command */ + :5; + unchar target:5, /* SCSI target ID */ + channel:3; /* SCSI channel number */ + unchar lun:5, /* SCSI logical unit number */ + luntar:1, /* This cp is for Target (not LUN) */ + dispri:1, /* Disconnect Privilege granted */ + one:1; /* 1 */ + unchar mess[3]; /* Massage to/from Target */ + unchar cdb[12]; /* Command Descriptor Block */ + ulong data_len; /* If sg=0 Data Length, if sg=1 sglist length */ + struct mscp *cpp; /* Address to be returned in sp */ + ulong data_address; /* If sg=0 Data Address, if sg=1 sglist address */ + ulong sp_addr; /* Address where sp is DMA'ed when cp completes */ + ulong sense_addr; /* Address where Sense Data is DMA'ed on error */ + Scsi_Cmnd *SCpnt; + unsigned int index; /* cp index */ + struct sg_list *sglist; + }; + +struct hostdata { + struct mscp cp[MAX_MAILBOXES]; /* Mailboxes for this board */ + unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */ + unsigned int last_cp_used; /* Index of last mailbox used */ + unsigned int iocount; /* Total i/o done for this board */ + int board_number; /* Number of this board */ + char board_name[16]; /* Name of this board */ + char board_id[256]; /* data from INQUIRY on this board */ + int in_reset; /* True if board is doing a reset */ + int target_to[MAX_TARGET][MAX_CHANNEL]; /* N. of timeout errors on target */ + int target_redo[MAX_TARGET][MAX_CHANNEL]; /* If TRUE redo i/o on target */ + unsigned int retries; /* Number of internal retries */ + unsigned long last_retried_pid; /* Pid of last retried command */ + unsigned char subversion; /* Bus type, either ISA or EISA/PCI */ + unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */ + struct mssp sp[2]; /* Returned status for this board */ + }; + +static struct Scsi_Host *sh[MAX_BOARDS + 1]; +static const char *driver_name = "EATA"; +static char sha[MAX_BOARDS]; + +/* Initialize num_boards so that ihdlr can work while detect is in progress */ +static unsigned int num_boards = MAX_BOARDS; + +static unsigned long io_port[] __initdata = { + + /* Space for MAX_INT_PARAM ports usable while loading as a module */ + SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, + SKIP, SKIP, + + /* First ISA */ + 0x1f0, + + /* Space for MAX_PCI ports possibly reported by PCI_BIOS */ + SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, + SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, + + /* MAX_EISA ports */ + 0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88, + 0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88, + + /* Other (MAX_ISA - 1) ports */ + 0x170, 0x230, 0x330, + + /* End of list */ + 0x0 + }; + +#define HD(board) ((struct hostdata *) &sh[board]->hostdata) +#define BN(board) (HD(board)->board_name) + +#define H2DEV(x) htonl(x) +#define DEV2H(x) H2DEV(x) +#define V2DEV(addr) ((addr) ? H2DEV(virt_to_bus((void *)addr)) : 0) +#define DEV2V(addr) ((addr) ? DEV2H(bus_to_virt((unsigned long)addr)) : 0) + +static void do_interrupt_handler(int, void *, struct pt_regs *); +static void flush_dev(Scsi_Device *, unsigned long, unsigned int, unsigned int); +static int do_trace = FALSE; +static int setup_done = FALSE; +static int link_statistics = 0; +static int tag_mode = TAG_MIXED; +static int ext_tran = FALSE; +static int rev_scan = TRUE; + +#if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE) +static int tagged_comm = TRUE; +#else +static int tagged_comm = FALSE; +#endif + +#if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS) +static int linked_comm = TRUE; +#else +static int linked_comm = FALSE; +#endif + +#if defined(CONFIG_SCSI_EATA_MAX_TAGS) +static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS; +#else +static int max_queue_depth = MAX_CMD_PER_LUN; +#endif + +static void select_queue_depths(struct Scsi_Host *host, Scsi_Device *devlist) { + Scsi_Device *dev; + int j, ntag = 0, nuntag = 0, tqd, utqd; + IRQ_FLAGS + + IRQ_LOCK_SAVE + j = ((struct hostdata *) host->hostdata)->board_number; + + for(dev = devlist; dev; dev = dev->next) { + + if (dev->host != host) continue; + + if (TLDEV(dev->type) && (dev->tagged_supported || linked_comm)) + ntag++; + else + nuntag++; + } + + utqd = MAX_CMD_PER_LUN; + + tqd = (host->can_queue - utqd * nuntag) / (ntag ? ntag : 1); + + if (tqd > max_queue_depth) tqd = max_queue_depth; + + if (tqd < MAX_CMD_PER_LUN) tqd = MAX_CMD_PER_LUN; + + for(dev = devlist; dev; dev = dev->next) { + char *tag_suffix = "", *link_suffix = ""; + + if (dev->host != host) continue; + + if (TLDEV(dev->type) && (dev->tagged_supported || linked_comm)) + dev->queue_depth = tqd; + else + dev->queue_depth = utqd; + + if (TLDEV(dev->type)) { + if (linked_comm && dev->queue_depth > 2) + link_suffix = ", sorted"; + else + link_suffix = ", unsorted"; + } + + if (tagged_comm && dev->tagged_supported && TLDEV(dev->type)) { + dev->tagged_queue = 1; + dev->current_tag = 1; + } + + if (dev->tagged_supported && TLDEV(dev->type) && dev->tagged_queue) + tag_suffix = ", tagged"; + else if (dev->tagged_supported && TLDEV(dev->type)) + tag_suffix = ", untagged"; + + printk("%s: scsi%d, channel %d, id %d, lun %d, cmds/lun %d%s%s.\n", + BN(j), host->host_no, dev->channel, dev->id, dev->lun, + dev->queue_depth, link_suffix, tag_suffix); + } + + IRQ_UNLOCK_RESTORE + return; +} + +static inline int wait_on_busy(unsigned long iobase, unsigned int loop) { + + while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) { + udelay(1L); + if (--loop == 0) return TRUE; + } + + return FALSE; +} + +static inline int do_dma(unsigned long iobase, unsigned int addr, unchar cmd) { + + if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP))) return TRUE; + + if ((addr = V2DEV(addr))) { + outb((char) (addr >> 24), iobase + REG_LOW); + outb((char) (addr >> 16), iobase + REG_LM); + outb((char) (addr >> 8), iobase + REG_MID); + outb((char) addr, iobase + REG_MSB); + } + + outb(cmd, iobase + REG_CMD); + return FALSE; +} + +static inline int read_pio(unsigned long iobase, ushort *start, ushort *end) { + unsigned int loop = MAXLOOP; + ushort *p; + + for (p = start; p <= end; p++) { + + while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) { + udelay(1L); + if (--loop == 0) return TRUE; + } + + loop = MAXLOOP; + *p = inw(iobase); + } + + return FALSE; +} + +__initfunc (static inline int + get_pci_irq(unsigned long port_base, unsigned char *apic_irq)) { + +#if defined(CONFIG_PCI) + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93) + + unsigned int addr; + struct pci_dev *dev = NULL; + + if (!pci_present()) return FALSE; + + while((dev = pci_find_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) { + + if (pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &addr)) continue; + +#if defined(DEBUG_PCI_DETECT) + printk("%s: get_pci_irq, bus %d, devfn 0x%x, addr 0x%x, apic_irq %u.\n", + driver_name, dev->bus->number, dev->devfn, addr, dev->irq); +#endif + + if ((addr & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_IO) + continue; + + if ((addr & PCI_BASE_ADDRESS_IO_MASK) + PCI_BASE_ADDRESS_0 == port_base) { + *apic_irq = dev->irq; + return TRUE; + } + + } + +#endif /* end new style PCI code */ + +#endif /* end CONFIG_PCI */ + + return FALSE; +} + +__initfunc (static inline int port_detect \ + (unsigned long port_base, unsigned int j, Scsi_Host_Template *tpnt)) { + unsigned char irq, dma_channel, subversion, i; + unsigned char protocol_rev, apic_irq; + struct eata_info info; + char *bus_type, dma_name[16], tag_type; + + /* Allowed DMA channels for ISA (0 indicates reserved) */ + unsigned char dma_channel_table[4] = { 5, 6, 7, 0 }; + + char name[16]; + + sprintf(name, "%s%d", driver_name, j); + + if(check_region(port_base, REGION_SIZE)) { + printk("%s: address 0x%03lx in use, skipping probe.\n", name, port_base); + return FALSE; + } + + if (do_dma(port_base, 0, READ_CONFIG_PIO)) return FALSE; + + /* Read the info structure */ + if (read_pio(port_base, (ushort *)&info, (ushort *)&info.ipad[0])) + return FALSE; + + /* Check the controller "EATA" signature */ + if (info.sign != EATA_SIGNATURE) return FALSE; + + if (DEV2H(info.data_len) < EATA_2_0A_SIZE) { + printk("%s: config structure size (%ld bytes) too short, detaching.\n", + name, DEV2H(info.data_len)); + return FALSE; + } + else if (DEV2H(info.data_len) == EATA_2_0A_SIZE) + protocol_rev = 'A'; + else if (DEV2H(info.data_len) == EATA_2_0B_SIZE) + protocol_rev = 'B'; + else + protocol_rev = 'C'; + + if (!setup_done && j > 0 && j <= MAX_PCI) { + bus_type = "PCI"; + subversion = ESA; + } + else if (port_base > MAX_EISA_ADDR || (protocol_rev == 'C' && info.pci)) { + bus_type = "PCI"; + subversion = ESA; + } + else if (port_base >= MIN_EISA_ADDR || (protocol_rev == 'C' && info.eisa)) { + bus_type = "EISA"; + subversion = ESA; + } + else if (protocol_rev == 'C' && !info.eisa && !info.pci) { + bus_type = "ISA"; + subversion = ISA; + } + else if (port_base > MAX_ISA_ADDR) { + bus_type = "PCI"; + subversion = ESA; + } + else { + bus_type = "ISA"; + subversion = ISA; + } + + if (!info.haaval || info.ata) { + printk("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n", + name, port_base, bus_type, info.haaval, info.ata); + return FALSE; + } + + if (info.drqvld) { + + if (subversion == ESA) + printk("%s: warning, weird %s board using DMA.\n", name, bus_type); + + subversion = ISA; + dma_channel = dma_channel_table[3 - info.drqx]; + } + else { + + if (subversion == ISA) + printk("%s: warning, weird %s board not using DMA.\n", name, bus_type); + + subversion = ESA; + dma_channel = NO_DMA; + } + + if (!info.dmasup) + printk("%s: warning, DMA protocol support not asserted.\n", name); + + irq = info.irq; + + if (subversion == ESA && !info.irq_tr) + printk("%s: warning, LEVEL triggering is suggested for IRQ %u.\n", + name, irq); + + if (get_pci_irq(port_base, &apic_irq) && (irq != apic_irq)) { + printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq, apic_irq); + irq = apic_irq; + } + + /* Board detected, allocate its IRQ */ + if (request_irq(irq, do_interrupt_handler, + SA_INTERRUPT | ((subversion == ESA) ? SA_SHIRQ : 0), + driver_name, (void *) &sha[j])) { + printk("%s: unable to allocate IRQ %u, detaching.\n", name, irq); + return FALSE; + } + + if (subversion == ISA && request_dma(dma_channel, driver_name)) { + printk("%s: unable to allocate DMA channel %u, detaching.\n", + name, dma_channel); + free_irq(irq, &sha[j]); + return FALSE; + } + +#if defined(FORCE_CONFIG) + { + struct eata_config config; + + /* Set board configuration */ + memset((char *)&config, 0, sizeof(struct eata_config)); + config.len = (ushort) htons((ushort)510); + config.ocena = TRUE; + + if (do_dma(port_base, (unsigned int)&config, SET_CONFIG_DMA)) { + printk("%s: busy timeout sending configuration, detaching.\n", name); + return FALSE; + } + } +#endif + + sh[j] = scsi_register(tpnt, sizeof(struct hostdata)); + + if (sh[j] == NULL) { + printk("%s: unable to register host, detaching.\n", name); + + free_irq(irq, &sha[j]); + + if (subversion == ISA) free_dma(dma_channel); + + return FALSE; + } + + sh[j]->io_port = port_base; + sh[j]->unique_id = port_base; + sh[j]->n_io_port = REGION_SIZE; + sh[j]->dma_channel = dma_channel; + sh[j]->irq = irq; + sh[j]->sg_tablesize = (ushort) ntohs(info.scatt_size); + sh[j]->this_id = (ushort) info.host_addr[3]; + sh[j]->can_queue = (ushort) ntohs(info.queue_size); + sh[j]->cmd_per_lun = MAX_CMD_PER_LUN; + sh[j]->select_queue_depths = select_queue_depths; + + /* Register the I/O space that we use */ + request_region(sh[j]->io_port, sh[j]->n_io_port, driver_name); + + memset(HD(j), 0, sizeof(struct hostdata)); + HD(j)->subversion = subversion; + HD(j)->protocol_rev = protocol_rev; + HD(j)->board_number = j; + + if (HD(j)->subversion == ESA) + sh[j]->unchecked_isa_dma = FALSE; + else { + sh[j]->wish_block = TRUE; + sh[j]->unchecked_isa_dma = TRUE; + disable_dma(dma_channel); + clear_dma_ff(dma_channel); + set_dma_mode(dma_channel, DMA_MODE_CASCADE); + enable_dma(dma_channel); + } + + strcpy(BN(j), name); + + /* DPT PM2012 does not allow to detect sg_tablesize correctly */ + if (sh[j]->sg_tablesize > MAX_SGLIST || sh[j]->sg_tablesize < 2) { + printk("%s: detect, wrong n. of SG lists %d, fixed.\n", + BN(j), sh[j]->sg_tablesize); + sh[j]->sg_tablesize = MAX_SGLIST; + } + + /* DPT PM2012 does not allow to detect can_queue correctly */ + if (sh[j]->can_queue > MAX_MAILBOXES || sh[j]->can_queue < 2) { + printk("%s: detect, wrong n. of mbox %d, fixed.\n", + BN(j), sh[j]->can_queue); + sh[j]->can_queue = MAX_MAILBOXES; + } + + if (protocol_rev != 'A') { + + if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL) + sh[j]->max_channel = info.max_chan; + + if (info.max_id > 7 && info.max_id < MAX_TARGET) + sh[j]->max_id = info.max_id + 1; + + if (info.large_sg && sh[j]->sg_tablesize == MAX_SGLIST) + sh[j]->sg_tablesize = MAX_LARGE_SGLIST; + } + + if (protocol_rev == 'C') { + + if (info.max_lun > 7 && info.max_lun < MAX_LUN) + sh[j]->max_lun = info.max_lun + 1; + } + + if (dma_channel == NO_DMA) sprintf(dma_name, "%s", "BMST"); + else sprintf(dma_name, "DMA %u", dma_channel); + + for (i = 0; i < sh[j]->can_queue; i++) + if (! ((&HD(j)->cp[i])->sglist = kmalloc( + sh[j]->sg_tablesize * sizeof(struct sg_list), + (sh[j]->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC))) { + printk("%s: kmalloc SGlist failed, mbox %d, detaching.\n", BN(j), i); + eata2x_release(sh[j]); + return FALSE; + } + + if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN) + max_queue_depth = MAX_TAGGED_CMD_PER_LUN; + + if (max_queue_depth < MAX_CMD_PER_LUN) max_queue_depth = MAX_CMD_PER_LUN; + + if (tagged_comm) { + if (tag_mode == TAG_SIMPLE) tag_type = '1'; + else if (tag_mode == TAG_HEAD) tag_type = '2'; + else if (tag_mode == TAG_ORDERED) tag_type = '3'; + else tag_type = 'y'; + } + else tag_type = 'n'; + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101) + sh[j]->hostt->use_new_eh_code = use_new_eh_code; +#else + use_new_eh_code = FALSE; +#endif + + if (j == 0) { + printk("EATA/DMA 2.0x: Copyright (C) 1994-1998 Dario Ballabio.\n"); + printk("%s config options -> tc:%c, lc:%c, mq:%d, eh:%c, rs:%c, et:%c.\n", + driver_name, tag_type, YESNO(linked_comm), max_queue_depth, + YESNO(use_new_eh_code), YESNO(rev_scan), YESNO(ext_tran)); + } + + printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n", + BN(j), HD(j)->protocol_rev, bus_type, (unsigned long)sh[j]->io_port, + sh[j]->irq, dma_name, sh[j]->sg_tablesize, sh[j]->can_queue); + + if (sh[j]->max_id > 8 || sh[j]->max_lun > 8) + printk("%s: wide SCSI support enabled, max_id %u, max_lun %u.\n", + BN(j), sh[j]->max_id, sh[j]->max_lun); + + for (i = 0; i <= sh[j]->max_channel; i++) + printk("%s: SCSI channel %u enabled, host target ID %d.\n", + BN(j), i, info.host_addr[3 - i]); + +#if defined(DEBUG_DETECT) + printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, "\ + "sec. %u, infol %ld, cpl %ld spl %ld.\n", name, info.version, + info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync, + info.second, DEV2H(info.data_len), DEV2H(info.cp_len), + DEV2H(info.sp_len)); + + if (protocol_rev == 'B' || protocol_rev == 'C') + printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, "\ + "large_sg %u, res1 %u.\n", name, info.isaena, info.forcaddr, + info.max_id, info.max_chan, info.large_sg, info.res1); + + if (protocol_rev == 'C') + printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, "\ + "raidnum %u.\n", name, info.max_lun, info.m1, info.idquest, + info.pci, info.eisa, info.raidnum); +#endif + + return TRUE; +} + +__initfunc (void eata2x_setup(char *str, int *ints)) { + int i, argc = ints[0]; + char *cur = str, *pc; + + if (argc > 0) { + + if (argc > MAX_INT_PARAM) argc = MAX_INT_PARAM; + + for (i = 0; i < argc; i++) io_port[i] = ints[i + 1]; + + io_port[i] = 0; + setup_done = TRUE; + } + + while (cur && (pc = strchr(cur, ':'))) { + int val = 0, c = *++pc; + + if (c == 'n' || c == 'N') val = FALSE; + else if (c == 'y' || c == 'Y') val = TRUE; + else val = (int) simple_strtoul(pc, NULL, 0); + + if (!strncmp(cur, "lc:", 3)) linked_comm = val; + else if (!strncmp(cur, "tc:", 3)) tagged_comm = val; + else if (!strncmp(cur, "tm:", 3)) tag_mode = val; + else if (!strncmp(cur, "mq:", 3)) max_queue_depth = val; + else if (!strncmp(cur, "ls:", 3)) link_statistics = val; + else if (!strncmp(cur, "eh:", 3)) use_new_eh_code = val; + else if (!strncmp(cur, "et:", 3)) ext_tran = val; + else if (!strncmp(cur, "rs:", 3)) rev_scan = val; + + if ((cur = strchr(cur, ','))) ++cur; + } + + return; +} + +__initfunc (static void add_pci_ports(void)) { + +#if defined(CONFIG_PCI) + + unsigned int addr, k; + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93) + + struct pci_dev *dev = NULL; + + if (!pci_present()) return; + + for (k = 0; k < MAX_PCI; k++) { + + if (!(dev = pci_find_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) break; + + if (pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &addr)) continue; + +#if defined(DEBUG_PCI_DETECT) + printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n", + driver_name, k, dev->bus->number, dev->devfn, addr); +#endif + + if ((addr & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_IO) + continue; + + /* Order addresses according to rev_scan value */ + io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] = + (addr & PCI_BASE_ADDRESS_IO_MASK) + PCI_BASE_ADDRESS_0; + } + +#else /* else old style PCI code */ + + unsigned short i = 0; + unsigned char bus, devfn; + + if (!pcibios_present()) return; + + for (k = 0; k < MAX_PCI; k++) { + + if (pcibios_find_class(PCI_CLASS_STORAGE_SCSI << 8, i++, &bus, &devfn) + != PCIBIOS_SUCCESSFUL) break; + + if (pcibios_read_config_dword(bus, devfn, PCI_BASE_ADDRESS_0, &addr) + != PCIBIOS_SUCCESSFUL) continue; + +#if defined(DEBUG_PCI_DETECT) + printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n", + driver_name, k, bus, devfn, addr); +#endif + + if ((addr & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_IO) + continue; + + /* Order addresses according to rev_scan value */ + io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] = + (addr & PCI_BASE_ADDRESS_IO_MASK) + PCI_BASE_ADDRESS_0; + } + +#endif /* end old style PCI code */ + +#endif /* end CONFIG_PCI */ + + return; +} + +__initfunc (int eata2x_detect(Scsi_Host_Template *tpnt)) { + unsigned int j = 0, k; + IRQ_FLAGS + + IRQ_LOCK_SAVE + tpnt->proc_dir = &proc_scsi_eata2x; + +#if defined(MODULE) + /* io_port could have been modified when loading as a module */ + if(io_port[0] != SKIP) { + setup_done = TRUE; + io_port[MAX_INT_PARAM] = 0; + } +#endif + + for (k = 0; k < MAX_BOARDS + 1; k++) sh[k] = NULL; + + if (!setup_done) add_pci_ports(); + + for (k = 0; io_port[k]; k++) { + + if (io_port[k] == SKIP) continue; + + if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt)) j++; + } + + num_boards = j; + IRQ_UNLOCK_RESTORE + return j; +} + +static inline void build_sg_list(struct mscp *cpp, Scsi_Cmnd *SCpnt) { + unsigned int k; + struct scatterlist *sgpnt; + + sgpnt = (struct scatterlist *) SCpnt->request_buffer; + + for (k = 0; k < SCpnt->use_sg; k++) { + cpp->sglist[k].address = V2DEV(sgpnt[k].address); + cpp->sglist[k].num_bytes = H2DEV(sgpnt[k].length); + } + + cpp->data_address = V2DEV(cpp->sglist); + cpp->data_len = H2DEV((SCpnt->use_sg * sizeof(struct sg_list))); +} + +static inline int do_qcomm(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)) { + unsigned int i, j, k; + struct mscp *cpp; + struct mssp *spp; + + static const unsigned char data_out_cmds[] = { + 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e, + 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40, + 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b + }; + + static const unsigned char data_none_cmds[] = { + 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e, + 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47, + 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5 + }; + + /* j is the board number */ + j = ((struct hostdata *) SCpnt->host->hostdata)->board_number; + + if (SCpnt->host_scribble) + panic("%s: qcomm, pid %ld, SCpnt %p already active.\n", + BN(j), SCpnt->pid, SCpnt); + + /* i is the mailbox number, look for the first free mailbox + starting from last_cp_used */ + i = HD(j)->last_cp_used + 1; + + for (k = 0; k < sh[j]->can_queue; k++, i++) { + + if (i >= sh[j]->can_queue) i = 0; + + if (HD(j)->cp_stat[i] == FREE) { + HD(j)->last_cp_used = i; + break; + } + } + + if (k == sh[j]->can_queue) { + printk("%s: qcomm, no free mailbox.\n", BN(j)); + return 1; + } + + /* Set pointer to control packet structure */ + cpp = &HD(j)->cp[i]; + + memset(cpp, 0, sizeof(struct mscp) - sizeof(struct sg_list *)); + + /* Set pointer to status packet structure */ + spp = &HD(j)->sp[0]; + + /* The EATA protocol uses Big Endian format */ + cpp->sp_addr = V2DEV(spp); + + cpp->cpp = cpp; + SCpnt->scsi_done = done; + cpp->index = i; + SCpnt->host_scribble = (unsigned char *) &cpp->index; + + if (do_trace) printk("%s: qcomm, mbox %d, target %d.%d:%d, pid %ld.\n", + BN(j), i, SCpnt->channel, SCpnt->target, + SCpnt->lun, SCpnt->pid); + + for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++) + if (SCpnt->cmnd[0] == data_out_cmds[k]) { + cpp->dout = TRUE; + break; + } + + if ((cpp->din = !cpp->dout)) + for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++) + if (SCpnt->cmnd[0] == data_none_cmds[k]) { + cpp->din = FALSE; + break; + } + + cpp->reqsen = TRUE; + cpp->dispri = TRUE; +#if 0 + if (SCpnt->device->type == TYPE_TAPE) cpp->hbaci = TRUE; +#endif + cpp->one = TRUE; + cpp->channel = SCpnt->channel; + cpp->target = SCpnt->target; + cpp->lun = SCpnt->lun; + cpp->SCpnt = SCpnt; + cpp->sense_addr = V2DEV(SCpnt->sense_buffer); + cpp->sense_len = sizeof SCpnt->sense_buffer; + + if (SCpnt->device->tagged_queue) { + + if (HD(j)->target_redo[SCpnt->target][SCpnt->channel] || + HD(j)->target_to[SCpnt->target][SCpnt->channel]) + cpp->mess[0] = ORDERED_QUEUE_TAG; + else if (tag_mode == TAG_SIMPLE) cpp->mess[0] = SIMPLE_QUEUE_TAG; + else if (tag_mode == TAG_HEAD) cpp->mess[0] = HEAD_OF_QUEUE_TAG; + else if (tag_mode == TAG_ORDERED) cpp->mess[0] = ORDERED_QUEUE_TAG; + else if (SCpnt->device->current_tag == 0) + cpp->mess[0] = ORDERED_QUEUE_TAG; + else if (SCpnt->device->current_tag == 1) + cpp->mess[0] = HEAD_OF_QUEUE_TAG; + else + cpp->mess[0] = SIMPLE_QUEUE_TAG; + + cpp->mess[1] = SCpnt->device->current_tag++; + } + + if (SCpnt->use_sg) { + cpp->sg = TRUE; + build_sg_list(cpp, SCpnt); + } + else { + cpp->data_address = V2DEV(SCpnt->request_buffer); + cpp->data_len = H2DEV(SCpnt->request_bufflen); + } + + memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len); + + if (linked_comm && SCpnt->device->queue_depth > 2 + && TLDEV(SCpnt->device->type)) { + HD(j)->cp_stat[i] = READY; + flush_dev(SCpnt->device, SCpnt->request.sector, j, FALSE); + return 0; + } + + /* Send control packet to the board */ + if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) { + SCpnt->host_scribble = NULL; + printk("%s: qcomm, target %d.%d:%d, pid %ld, adapter busy.\n", + BN(j), SCpnt->channel, SCpnt->target, SCpnt->lun, SCpnt->pid); + return 1; + } + + HD(j)->cp_stat[i] = IN_USE; + return 0; +} + +int eata2x_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)) { + int rtn; + IRQ_FLAGS + + IRQ_LOCK_SAVE + rtn = do_qcomm(SCpnt, done); + IRQ_UNLOCK_RESTORE + return rtn; +} + +static inline int do_old_abort(Scsi_Cmnd *SCarg) { + unsigned int i, j; + + j = ((struct hostdata *) SCarg->host->hostdata)->board_number; + + if (SCarg->host_scribble == NULL || + (SCarg->serial_number_at_timeout && + (SCarg->serial_number != SCarg->serial_number_at_timeout))) { + printk("%s: abort, target %d.%d:%d, pid %ld inactive.\n", + BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid); + return SCSI_ABORT_NOT_RUNNING; + } + + i = *(unsigned int *)SCarg->host_scribble; + printk("%s: abort, mbox %d, target %d.%d:%d, pid %ld.\n", + BN(j), i, SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid); + + if (i >= sh[j]->can_queue) + panic("%s: abort, invalid SCarg->host_scribble.\n", BN(j)); + + if (wait_on_busy(sh[j]->io_port, MAXLOOP)) { + printk("%s: abort, timeout error.\n", BN(j)); + return SCSI_ABORT_ERROR; + } + + if (HD(j)->cp_stat[i] == FREE) { + printk("%s: abort, mbox %d is free.\n", BN(j), i); + return SCSI_ABORT_NOT_RUNNING; + } + + if (HD(j)->cp_stat[i] == IN_USE) { + printk("%s: abort, mbox %d is in use.\n", BN(j), i); + + if (SCarg != HD(j)->cp[i].SCpnt) + panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n", + BN(j), i, SCarg, HD(j)->cp[i].SCpnt); + + if (inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED) + printk("%s: abort, mbox %d, interrupt pending.\n", BN(j), i); + + return SCSI_ABORT_SNOOZE; + } + + if (HD(j)->cp_stat[i] == IN_RESET) { + printk("%s: abort, mbox %d is in reset.\n", BN(j), i); + return SCSI_ABORT_ERROR; + } + + if (HD(j)->cp_stat[i] == LOCKED) { + printk("%s: abort, mbox %d is locked.\n", BN(j), i); + return SCSI_ABORT_NOT_RUNNING; + } + + if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) { + SCarg->result = DID_ABORT << 16; + SCarg->host_scribble = NULL; + HD(j)->cp_stat[i] = FREE; + printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n", + BN(j), i, SCarg->pid); + SCarg->scsi_done(SCarg); + return SCSI_ABORT_SUCCESS; + } + + panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i); +} + +int eata2x_old_abort(Scsi_Cmnd *SCarg) { + int rtn; + IRQ_FLAGS + + IRQ_LOCK_SAVE + rtn = do_old_abort(SCarg); + IRQ_UNLOCK_RESTORE + return rtn; +} + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101) + +static inline int do_abort(Scsi_Cmnd *SCarg) { + unsigned int i, j; + + j = ((struct hostdata *) SCarg->host->hostdata)->board_number; + + if (SCarg->host_scribble == NULL) { + printk("%s: abort, target %d.%d:%d, pid %ld inactive.\n", + BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid); + return SUCCESS; + } + + i = *(unsigned int *)SCarg->host_scribble; + printk("%s: abort, mbox %d, target %d.%d:%d, pid %ld.\n", + BN(j), i, SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid); + + if (i >= sh[j]->can_queue) + panic("%s: abort, invalid SCarg->host_scribble.\n", BN(j)); + + if (wait_on_busy(sh[j]->io_port, MAXLOOP)) { + printk("%s: abort, timeout error.\n", BN(j)); + return FAILED; + } + + if (HD(j)->cp_stat[i] == FREE) { + printk("%s: abort, mbox %d is free.\n", BN(j), i); + return SUCCESS; + } + + if (HD(j)->cp_stat[i] == IN_USE) { + printk("%s: abort, mbox %d is in use.\n", BN(j), i); + + if (SCarg != HD(j)->cp[i].SCpnt) + panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n", + BN(j), i, SCarg, HD(j)->cp[i].SCpnt); + + if (inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED) + printk("%s: abort, mbox %d, interrupt pending.\n", BN(j), i); + + if (SCarg->eh_state == SCSI_STATE_TIMEOUT) { + SCarg->host_scribble = NULL; + HD(j)->cp_stat[i] = FREE; + printk("%s, abort, mbox %d, eh_state timeout, pid %ld.\n", + BN(j), i, SCarg->pid); + return SUCCESS; + } + + return FAILED; + } + + if (HD(j)->cp_stat[i] == IN_RESET) { + printk("%s: abort, mbox %d is in reset.\n", BN(j), i); + return FAILED; + } + + if (HD(j)->cp_stat[i] == LOCKED) { + printk("%s: abort, mbox %d is locked.\n", BN(j), i); + return SUCCESS; + } + + if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) { + SCarg->result = DID_ABORT << 16; + SCarg->host_scribble = NULL; + HD(j)->cp_stat[i] = FREE; + printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n", + BN(j), i, SCarg->pid); + SCarg->scsi_done(SCarg); + return SUCCESS; + } + + panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i); +} + +int eata2x_abort(Scsi_Cmnd *SCarg) { + + return do_abort(SCarg); +} + +#endif /* new_eh_code */ + +static inline int do_old_reset(Scsi_Cmnd *SCarg) { + unsigned int i, j, time, k, c, limit = 0; + int arg_done = FALSE; + Scsi_Cmnd *SCpnt; + + j = ((struct hostdata *) SCarg->host->hostdata)->board_number; + printk("%s: reset, enter, target %d.%d:%d, pid %ld.\n", + BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid); + + if (SCarg->host_scribble == NULL) + printk("%s: reset, pid %ld inactive.\n", BN(j), SCarg->pid); + + if (SCarg->serial_number_at_timeout && + (SCarg->serial_number != SCarg->serial_number_at_timeout)) { + printk("%s: reset, pid %ld, reset not running.\n", BN(j), SCarg->pid); + return SCSI_RESET_NOT_RUNNING; + } + + if (HD(j)->in_reset) { + printk("%s: reset, exit, already in reset.\n", BN(j)); + return SCSI_RESET_ERROR; + } + + if (wait_on_busy(sh[j]->io_port, MAXLOOP)) { + printk("%s: reset, exit, timeout error.\n", BN(j)); + return SCSI_RESET_ERROR; + } + + HD(j)->retries = 0; + + for (c = 0; c <= sh[j]->max_channel; c++) + for (k = 0; k < sh[j]->max_id; k++) { + HD(j)->target_redo[k][c] = TRUE; + HD(j)->target_to[k][c] = 0; + } + + for (i = 0; i < sh[j]->can_queue; i++) { + + if (HD(j)->cp_stat[i] == FREE) continue; + + if (HD(j)->cp_stat[i] == LOCKED) { + HD(j)->cp_stat[i] = FREE; + printk("%s: reset, locked mbox %d forced free.\n", BN(j), i); + continue; + } + + if (!(SCpnt = HD(j)->cp[i].SCpnt)) + panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i); + + if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) { + HD(j)->cp_stat[i] = ABORTING; + printk("%s: reset, mbox %d aborting, pid %ld.\n", + BN(j), i, SCpnt->pid); + } + + else { + HD(j)->cp_stat[i] = IN_RESET; + printk("%s: reset, mbox %d in reset, pid %ld.\n", + BN(j), i, SCpnt->pid); + } + + if (SCpnt->host_scribble == NULL) + panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i); + + if (*(unsigned int *)SCpnt->host_scribble != i) + panic("%s: reset, mbox %d, index mismatch.\n", BN(j), i); + + if (SCpnt->scsi_done == NULL) + panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", BN(j), i); + + if (SCpnt == SCarg) arg_done = TRUE; + } + + if (do_dma(sh[j]->io_port, 0, RESET_PIO)) { + printk("%s: reset, cannot reset, timeout error.\n", BN(j)); + return SCSI_RESET_ERROR; + } + + printk("%s: reset, board reset done, enabling interrupts.\n", BN(j)); + +#if defined(DEBUG_RESET) + do_trace = TRUE; +#endif + + HD(j)->in_reset = TRUE; + SPIN_UNLOCK + IRQ_UNLOCK + time = jiffies; + while ((jiffies - time) < (10 * HZ) && limit++ < 200000) udelay(100L); + IRQ_LOCK + SPIN_LOCK + printk("%s: reset, interrupts disabled, loops %d.\n", BN(j), limit); + + for (i = 0; i < sh[j]->can_queue; i++) { + + if (HD(j)->cp_stat[i] == IN_RESET) { + SCpnt = HD(j)->cp[i].SCpnt; + SCpnt->result = DID_RESET << 16; + SCpnt->host_scribble = NULL; + + /* This mailbox is still waiting for its interrupt */ + HD(j)->cp_stat[i] = LOCKED; + + printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n", + BN(j), i, SCpnt->pid); + } + + else if (HD(j)->cp_stat[i] == ABORTING) { + SCpnt = HD(j)->cp[i].SCpnt; + SCpnt->result = DID_RESET << 16; + SCpnt->host_scribble = NULL; + + /* This mailbox was never queued to the adapter */ + HD(j)->cp_stat[i] = FREE; + + printk("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n", + BN(j), i, SCpnt->pid); + } + + else + + /* Any other mailbox has already been set free by interrupt */ + continue; + + SCpnt->scsi_done(SCpnt); + IRQ_LOCK + } + + HD(j)->in_reset = FALSE; + do_trace = FALSE; + + if (arg_done) { + printk("%s: reset, exit, success.\n", BN(j)); + return SCSI_RESET_SUCCESS; + } + else { + printk("%s: reset, exit, wakeup.\n", BN(j)); + return SCSI_RESET_PUNT; + } +} + +int eata2x_old_reset(Scsi_Cmnd *SCarg, unsigned int reset_flags) { + int rtn; + IRQ_FLAGS + + IRQ_LOCK_SAVE + rtn = do_old_reset(SCarg); + IRQ_UNLOCK_RESTORE + return rtn; +} + +#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,101) + +static inline int do_reset(Scsi_Cmnd *SCarg) { + unsigned int i, j, time, k, c, limit = 0; + int arg_done = FALSE; + Scsi_Cmnd *SCpnt; + + j = ((struct hostdata *) SCarg->host->hostdata)->board_number; + printk("%s: reset, enter, target %d.%d:%d, pid %ld.\n", + BN(j), SCarg->channel, SCarg->target, SCarg->lun, SCarg->pid); + + if (SCarg->host_scribble == NULL) + printk("%s: reset, pid %ld inactive.\n", BN(j), SCarg->pid); + + if (HD(j)->in_reset) { + printk("%s: reset, exit, already in reset.\n", BN(j)); + return FAILED; + } + + if (wait_on_busy(sh[j]->io_port, MAXLOOP)) { + printk("%s: reset, exit, timeout error.\n", BN(j)); + return FAILED; + } + + HD(j)->retries = 0; + + for (c = 0; c <= sh[j]->max_channel; c++) + for (k = 0; k < sh[j]->max_id; k++) { + HD(j)->target_redo[k][c] = TRUE; + HD(j)->target_to[k][c] = 0; + } + + for (i = 0; i < sh[j]->can_queue; i++) { + + if (HD(j)->cp_stat[i] == FREE) continue; + + if (HD(j)->cp_stat[i] == LOCKED) { + HD(j)->cp_stat[i] = FREE; + printk("%s: reset, locked mbox %d forced free.\n", BN(j), i); + continue; + } + + if (!(SCpnt = HD(j)->cp[i].SCpnt)) + panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i); + + if (HD(j)->cp_stat[i] == READY || HD(j)->cp_stat[i] == ABORTING) { + HD(j)->cp_stat[i] = ABORTING; + printk("%s: reset, mbox %d aborting, pid %ld.\n", + BN(j), i, SCpnt->pid); + } + + else { + HD(j)->cp_stat[i] = IN_RESET; + printk("%s: reset, mbox %d in reset, pid %ld.\n", + BN(j), i, SCpnt->pid); + } + + if (SCpnt->host_scribble == NULL) + panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i); + + if (*(unsigned int *)SCpnt->host_scribble != i) + panic("%s: reset, mbox %d, index mismatch.\n", BN(j), i); + + if (SCpnt->scsi_done == NULL) + panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", BN(j), i); + + if (SCpnt == SCarg) arg_done = TRUE; + } + + if (do_dma(sh[j]->io_port, 0, RESET_PIO)) { + printk("%s: reset, cannot reset, timeout error.\n", BN(j)); + return FAILED; + } + + printk("%s: reset, board reset done, enabling interrupts.\n", BN(j)); + +#if defined(DEBUG_RESET) + do_trace = TRUE; +#endif + + HD(j)->in_reset = TRUE; + SPIN_UNLOCK + IRQ_UNLOCK + time = jiffies; + while ((jiffies - time) < (10 * HZ) && limit++ < 200000) udelay(100L); + IRQ_LOCK + SPIN_LOCK + printk("%s: reset, interrupts disabled, loops %d.\n", BN(j), limit); + + for (i = 0; i < sh[j]->can_queue; i++) { + + if (HD(j)->cp_stat[i] == IN_RESET) { + SCpnt = HD(j)->cp[i].SCpnt; + SCpnt->result = DID_RESET << 16; + SCpnt->host_scribble = NULL; + + /* This mailbox is still waiting for its interrupt */ + HD(j)->cp_stat[i] = LOCKED; + + printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n", + BN(j), i, SCpnt->pid); + } + + else if (HD(j)->cp_stat[i] == ABORTING) { + SCpnt = HD(j)->cp[i].SCpnt; + SCpnt->result = DID_RESET << 16; + SCpnt->host_scribble = NULL; + + /* This mailbox was never queued to the adapter */ + HD(j)->cp_stat[i] = FREE; + + printk("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n", + BN(j), i, SCpnt->pid); + } + + else + + /* Any other mailbox has already been set free by interrupt */ + continue; + + SCpnt->scsi_done(SCpnt); + IRQ_LOCK + } + + HD(j)->in_reset = FALSE; + do_trace = FALSE; + + if (arg_done) printk("%s: reset, exit, pid %ld done.\n", BN(j), SCarg->pid); + else printk("%s: reset, exit.\n", BN(j)); + + return SUCCESS; +} + +int eata2x_reset(Scsi_Cmnd *SCarg) { + + return do_reset(SCarg); +} + +#endif /* new_eh_code */ + +int eata2x_biosparam(Disk *disk, kdev_t dev, int *dkinfo) { + int size = disk->capacity; + + if (ext_tran || (scsicam_bios_param(disk, dev, dkinfo) < 0)) { + dkinfo[0] = 255; + dkinfo[1] = 63; + dkinfo[2] = size / (dkinfo[0] * dkinfo[1]); + } + +#if defined (DEBUG_GEOMETRY) + printk ("%s: biosparam, head=%d, sec=%d, cyl=%d.\n", driver_name, + dkinfo[0], dkinfo[1], dkinfo[2]); +#endif + + return FALSE; +} + +static void sort(unsigned long sk[], unsigned int da[], unsigned int n, + unsigned int rev) { + unsigned int i, j, k, y; + unsigned long x; + + for (i = 0; i < n - 1; i++) { + k = i; + + for (j = k + 1; j < n; j++) + if (rev) { + if (sk[j] > sk[k]) k = j; + } + else { + if (sk[j] < sk[k]) k = j; + } + + if (k != i) { + x = sk[k]; sk[k] = sk[i]; sk[i] = x; + y = da[k]; da[k] = da[i]; da[i] = y; + } + } + + return; + } + +static inline int reorder(unsigned int j, unsigned long cursec, + unsigned int ihdlr, unsigned int il[], unsigned int n_ready) { + Scsi_Cmnd *SCpnt; + struct mscp *cpp; + unsigned int k, n; + unsigned int rev = FALSE, s = TRUE, r = TRUE; + unsigned int input_only = TRUE, overlap = FALSE; + unsigned long sl[n_ready], pl[n_ready], ll[n_ready]; + unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0; + unsigned long ioseek = 0; + + static unsigned int flushcount = 0, batchcount = 0, sortcount = 0; + static unsigned int readycount = 0, ovlcount = 0, inputcount = 0; + static unsigned int readysorted = 0, revcount = 0; + static unsigned long seeksorted = 0, seeknosort = 0; + + if (link_statistics && !(++flushcount % link_statistics)) + printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"\ + " av %ldK as %ldK.\n", flushcount, batchcount, inputcount, + ovlcount, readycount, readysorted, sortcount, revcount, + seeknosort / (readycount + 1), + seeksorted / (readycount + 1)); + + if (n_ready <= 1) return FALSE; + + for (n = 0; n < n_ready; n++) { + k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt; + + if (!cpp->din) input_only = FALSE; + + if (SCpnt->request.sector < minsec) minsec = SCpnt->request.sector; + if (SCpnt->request.sector > maxsec) maxsec = SCpnt->request.sector; + + sl[n] = SCpnt->request.sector; + ioseek += SCpnt->request.nr_sectors; + + if (!n) continue; + + if (sl[n] < sl[n - 1]) s = FALSE; + if (sl[n] > sl[n - 1]) r = FALSE; + + if (link_statistics) { + if (sl[n] > sl[n - 1]) + seek += sl[n] - sl[n - 1]; + else + seek += sl[n - 1] - sl[n]; + } + + } + + if (link_statistics) { + if (cursec > sl[0]) seek += cursec - sl[0]; else seek += sl[0] - cursec; + } + + if (cursec > ((maxsec + minsec) / 2)) rev = TRUE; + + if (ioseek > ((maxsec - minsec) / 2)) rev = FALSE; + + if (!((rev && r) || (!rev && s))) sort(sl, il, n_ready, rev); + + if (!input_only) for (n = 0; n < n_ready; n++) { + k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt; + ll[n] = SCpnt->request.nr_sectors; pl[n] = SCpnt->pid; + + if (!n) continue; + + if ((sl[n] == sl[n - 1]) || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n])) + || (rev && ((sl[n] + ll[n]) > sl[n - 1]))) overlap = TRUE; + } + + if (overlap) sort(pl, il, n_ready, FALSE); + + if (link_statistics) { + if (cursec > sl[0]) iseek = cursec - sl[0]; else iseek = sl[0] - cursec; + batchcount++; readycount += n_ready, seeknosort += seek / 1024; + if (input_only) inputcount++; + if (overlap) { ovlcount++; seeksorted += iseek / 1024; } + else seeksorted += (iseek + maxsec - minsec) / 1024; + if (rev && !r) { revcount++; readysorted += n_ready; } + if (!rev && !s) { sortcount++; readysorted += n_ready; } + } + +#if defined(DEBUG_LINKED_COMMANDS) + if (link_statistics && (overlap || !(flushcount % link_statistics))) + for (n = 0; n < n_ready; n++) { + k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt; + printk("%s %d.%d:%d pid %ld mb %d fc %d nr %d sec %ld ns %ld"\ + " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n", + (ihdlr ? "ihdlr" : "qcomm"), SCpnt->channel, SCpnt->target, + SCpnt->lun, SCpnt->pid, k, flushcount, n_ready, + SCpnt->request.sector, SCpnt->request.nr_sectors, cursec, + YESNO(s), YESNO(r), YESNO(rev), YESNO(input_only), + YESNO(overlap), cpp->din); + } +#endif + return overlap; +} + +static void flush_dev(Scsi_Device *dev, unsigned long cursec, unsigned int j, + unsigned int ihdlr) { + Scsi_Cmnd *SCpnt; + struct mscp *cpp; + unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES]; + + for (k = 0; k < sh[j]->can_queue; k++) { + + if (HD(j)->cp_stat[k] != READY && HD(j)->cp_stat[k] != IN_USE) continue; + + cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt; + + if (SCpnt->device != dev) continue; + + if (HD(j)->cp_stat[k] == IN_USE) return; + + il[n_ready++] = k; + } + + if (reorder(j, cursec, ihdlr, il, n_ready)) n_ready = 1; + + for (n = 0; n < n_ready; n++) { + k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt; + + if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) { + printk("%s: %s, target %d.%d:%d, pid %ld, mbox %d, adapter"\ + " busy, will abort.\n", BN(j), (ihdlr ? "ihdlr" : "qcomm"), + SCpnt->channel, SCpnt->target, SCpnt->lun, SCpnt->pid, k); + HD(j)->cp_stat[k] = ABORTING; + continue; + } + + HD(j)->cp_stat[k] = IN_USE; + } + +} + +static inline void ihdlr(int irq, unsigned int j) { + Scsi_Cmnd *SCpnt; + unsigned int i, k, c, status, tstatus, reg; + struct mssp *dspp, *spp; + struct mscp *cpp; + + if (sh[j]->irq != irq) + panic("%s: ihdlr, irq %d, sh[j]->irq %d.\n", BN(j), irq, sh[j]->irq); + + /* Check if this board need to be serviced */ + if (!(inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)) return; + + HD(j)->iocount++; + + if (do_trace) printk("%s: ihdlr, enter, irq %d, count %d.\n", BN(j), irq, + HD(j)->iocount); + + /* Check if this board is still busy */ + if (wait_on_busy(sh[j]->io_port, 20 * MAXLOOP)) { + reg = inb(sh[j]->io_port + REG_STATUS); + printk("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n", + BN(j), irq, reg, HD(j)->iocount); + return; + } + + dspp = &HD(j)->sp[0]; + spp = &HD(j)->sp[1]; + + /* Make a local copy just before clearing the interrupt indication */ + memcpy(spp, dspp, sizeof(struct mssp)); + + /* Clear the completion flag and cp pointer on the dynamic copy of sp */ + memset(dspp, 0, sizeof(struct mssp)); + + /* Read the status register to clear the interrupt indication */ + reg = inb(sh[j]->io_port + REG_STATUS); + + /* Reject any sp with supspect data */ + if (spp->eoc == FALSE) + printk("%s: ihdlr, spp->eoc == FALSE, irq %d, reg 0x%x, count %d.\n", + BN(j), irq, reg, HD(j)->iocount); + if (spp->cpp == NULL) + printk("%s: ihdlr, spp->cpp == NULL, irq %d, reg 0x%x, count %d.\n", + BN(j), irq, reg, HD(j)->iocount); + if (spp->eoc == FALSE || spp->cpp == NULL) return; + + cpp = spp->cpp; + +#if defined(DEBUG_GENERATE_ABORTS) + if ((HD(j)->iocount > 500) && ((HD(j)->iocount % 500) < 3)) return; +#endif + + /* Find the mailbox to be serviced on this board */ + i = cpp - HD(j)->cp; + + if (cpp < HD(j)->cp || cpp >= HD(j)->cp + sh[j]->can_queue + || i >= sh[j]->can_queue) + panic("%s: ihdlr, invalid mscp bus address %p, cp0 %p.\n", BN(j), + cpp, HD(j)->cp); + + if (HD(j)->cp_stat[i] == IGNORE) { + HD(j)->cp_stat[i] = FREE; + return; + } + else if (HD(j)->cp_stat[i] == LOCKED) { + HD(j)->cp_stat[i] = FREE; + printk("%s: ihdlr, mbox %d unlocked, count %d.\n", BN(j), i, + HD(j)->iocount); + return; + } + else if (HD(j)->cp_stat[i] == FREE) { + printk("%s: ihdlr, mbox %d is free, count %d.\n", BN(j), i, + HD(j)->iocount); + return; + } + else if (HD(j)->cp_stat[i] == IN_RESET) + printk("%s: ihdlr, mbox %d is in reset.\n", BN(j), i); + else if (HD(j)->cp_stat[i] != IN_USE) + panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n", + BN(j), i, HD(j)->cp_stat[i]); + + HD(j)->cp_stat[i] = FREE; + SCpnt = cpp->SCpnt; + + if (SCpnt == NULL) panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", BN(j), i); + + if (SCpnt->host_scribble == NULL) + panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n", BN(j), i, + SCpnt->pid, SCpnt); + + if (*(unsigned int *)SCpnt->host_scribble != i) + panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d.\n", + BN(j), i, SCpnt->pid, *(unsigned int *)SCpnt->host_scribble); + + if (linked_comm && SCpnt->device->queue_depth > 2 + && TLDEV(SCpnt->device->type)) + flush_dev(SCpnt->device, SCpnt->request.sector, j, TRUE); + + tstatus = status_byte(spp->target_status); + +#if defined(DEBUG_GENERATE_ERRORS) + if ((HD(j)->iocount > 500) && ((HD(j)->iocount % 200) < 2)) + spp->adapter_status = 0x01; +#endif + + switch (spp->adapter_status) { + case ASOK: /* status OK */ + + /* Forces a reset if a disk drive keeps returning BUSY */ + if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE) + status = DID_ERROR << 16; + + /* If there was a bus reset, redo operation on each target */ + else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK + && HD(j)->target_redo[SCpnt->target][SCpnt->channel]) + status = DID_BUS_BUSY << 16; + + /* Works around a flaw in scsi.c */ + else if (tstatus == CHECK_CONDITION + && SCpnt->device->type == TYPE_DISK + && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR) + status = DID_BUS_BUSY << 16; + + else + status = DID_OK << 16; + + if (tstatus == GOOD) + HD(j)->target_redo[SCpnt->target][SCpnt->channel] = FALSE; + + if (spp->target_status && SCpnt->device->type == TYPE_DISK) + printk("%s: ihdlr, target %d.%d:%d, pid %ld, "\ + "target_status 0x%x, sense key 0x%x.\n", BN(j), + SCpnt->channel, SCpnt->target, SCpnt->lun, + SCpnt->pid, spp->target_status, + SCpnt->sense_buffer[2]); + + HD(j)->target_to[SCpnt->target][SCpnt->channel] = 0; + + if (HD(j)->last_retried_pid == SCpnt->pid) HD(j)->retries = 0; + + break; + case ASST: /* Selection Time Out */ + case 0x02: /* Command Time Out */ + + if (HD(j)->target_to[SCpnt->target][SCpnt->channel] > 1) + status = DID_ERROR << 16; + else { + status = DID_TIME_OUT << 16; + HD(j)->target_to[SCpnt->target][SCpnt->channel]++; + } + + break; + + /* Perform a limited number of internal retries */ + case 0x03: /* SCSI Bus Reset Received */ + case 0x04: /* Initial Controller Power-up */ + + for (c = 0; c <= sh[j]->max_channel; c++) + for (k = 0; k < sh[j]->max_id; k++) + HD(j)->target_redo[k][c] = TRUE; + + if (SCpnt->device->type != TYPE_TAPE + && HD(j)->retries < MAX_INTERNAL_RETRIES) { + +#if defined(DID_SOFT_ERROR) + status = DID_SOFT_ERROR << 16; +#else + status = DID_BUS_BUSY << 16; +#endif + HD(j)->retries++; + HD(j)->last_retried_pid = SCpnt->pid; + } + else + status = DID_ERROR << 16; + + break; + case 0x05: /* Unexpected Bus Phase */ + case 0x06: /* Unexpected Bus Free */ + case 0x07: /* Bus Parity Error */ + case 0x08: /* SCSI Hung */ + case 0x09: /* Unexpected Message Reject */ + case 0x0a: /* SCSI Bus Reset Stuck */ + case 0x0b: /* Auto Request-Sense Failed */ + case 0x0c: /* Controller Ram Parity Error */ + default: + status = DID_ERROR << 16; + break; + } + + SCpnt->result = status | spp->target_status; + +#if defined(DEBUG_INTERRUPT) + if (SCpnt->result || do_trace) +#else + if ((spp->adapter_status != ASOK && HD(j)->iocount > 1000) || + (spp->adapter_status != ASOK && + spp->adapter_status != ASST && HD(j)->iocount <= 1000) || + do_trace || msg_byte(spp->target_status)) +#endif + printk("%s: ihdlr, mbox %2d, err 0x%x:%x,"\ + " target %d.%d:%d, pid %ld, reg 0x%x, count %d.\n", + BN(j), i, spp->adapter_status, spp->target_status, + SCpnt->channel, SCpnt->target, SCpnt->lun, SCpnt->pid, + reg, HD(j)->iocount); + + /* Set the command state to inactive */ + SCpnt->host_scribble = NULL; + + SCpnt->scsi_done(SCpnt); + + if (do_trace) printk("%s: ihdlr, exit, irq %d, count %d.\n", BN(j), irq, + HD(j)->iocount); + + return; +} + +static void do_interrupt_handler(int irq, void *shap, struct pt_regs *regs) { + unsigned int j; + IRQ_FLAGS + SPIN_FLAGS + + /* Check if the interrupt must be processed by this handler */ + if ((j = (unsigned int)((char *)shap - sha)) >= num_boards) return; + + SPIN_LOCK_SAVE + IRQ_LOCK_SAVE + ihdlr(irq, j); + IRQ_UNLOCK_RESTORE + SPIN_UNLOCK_RESTORE +} + +int eata2x_release(struct Scsi_Host *shpnt) { + unsigned int i, j; + IRQ_FLAGS + + IRQ_LOCK_SAVE + + for (j = 0; sh[j] != NULL && sh[j] != shpnt; j++); + + if (sh[j] == NULL) panic("%s: release, invalid Scsi_Host pointer.\n", + driver_name); + + for (i = 0; i < sh[j]->can_queue; i++) + if ((&HD(j)->cp[i])->sglist) kfree((&HD(j)->cp[i])->sglist); + + free_irq(sh[j]->irq, &sha[j]); + + if (sh[j]->dma_channel != NO_DMA) free_dma(sh[j]->dma_channel); + + release_region(sh[j]->io_port, sh[j]->n_io_port); + scsi_unregister(sh[j]); + IRQ_UNLOCK_RESTORE + return FALSE; +} + +#if defined(MODULE) +Scsi_Host_Template driver_template = EATA; + +#include "scsi_module.c" +#endif |