1112 lines
32 KiB
C
1112 lines
32 KiB
C
/*
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* ultrastor.c Copyright (C) 1992 David B. Gentzel
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* Low-level SCSI driver for UltraStor 14F, 24F, and 34F
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* by David B. Gentzel, Whitfield Software Services, Carnegie, PA
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* (gentzel@nova.enet.dec.com)
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* scatter/gather added by Scott Taylor (n217cg@tamuts.tamu.edu)
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* 24F and multiple command support by John F. Carr (jfc@athena.mit.edu)
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* John's work modified by Caleb Epstein (cae@jpmorgan.com) and
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* Eric Youngdale (eric@tantalus.nrl.navy.mil).
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* Thanks to UltraStor for providing the necessary documentation
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*/
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/*
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* TODO:
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* 1. Find out why scatter/gather is limited to 16 requests per command.
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* 2. Look at command linking (mscp.command_link and
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* mscp.command_link_id). (Does not work with many disks,
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* and no performance increase. ERY).
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* 3. Allow multiple adapters.
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*/
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/*
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* NOTES:
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* The UltraStor 14F, 24F, and 34F are a family of intelligent, high
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* performance SCSI-2 host adapters. They all support command queueing
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* and scatter/gather I/O. Some of them can also emulate the standard
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* WD1003 interface for use with OS's which don't support SCSI. Here
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* is the scoop on the various models:
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* 14F - ISA first-party DMA HA with floppy support and WD1003 emulation.
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* 14N - ISA HA with floppy support. I think that this is a non-DMA
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* HA. Nothing further known.
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* 24F - EISA Bus Master HA with floppy support and WD1003 emulation.
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* 34F - VL-Bus Bus Master HA with floppy support (no WD1003 emulation).
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*
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* The 14F, 24F, and 34F are supported by this driver.
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*
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* Places flagged with a triple question-mark are things which are either
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* unfinished, questionable, or wrong.
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*/
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/* Changes from version 1.9 to 1.11
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*
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* Patches to bring this driver up to speed with the default kernel
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* driver which supports only the 14F and 34F adapters. This version
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* should compile cleanly into 0.99.13, 0.99.12 and probably 0.99.11.
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*
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* Fixes from Eric Youngdale to fix a few possible race conditions and
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* several problems with bit testing operations (insufficient
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* parentheses).
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*
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* Removed the ultrastor_abort() and ultrastor_reset() functions
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* (enclosed them in #if 0 / #endif). These functions, at least on
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* the 24F, cause the SCSI bus to do odd things and generally lead to
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* kernel panics and machine hangs. This is like the Adaptec code.
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*
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* Use check/snarf_region for 14f, 34f to avoid I/O space address conflicts.
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*/
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/* Changes from version 1.8 to version 1.9
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*
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* 0.99.11 patches (cae@jpmorgan.com) */
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/* Changes from version 1.7 to version 1.8
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*
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* Better error reporting.
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*/
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/* Changes from version 1.6 to version 1.7
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*
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* Removed CSIR command code.
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*
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* Better race condition avoidance (xchgb function added).
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*
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* Set ICM and OGM status to zero at probe (24F)
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*
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* reset sends soft reset to UltraStor adapter
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*
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* reset adapter if adapter interrupts with an invalid MSCP address
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*
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* handle aborted command interrupt (24F)
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*
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*/
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/* Changes from version 1.5 to version 1.6:
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*
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* Read MSCP address from ICM _before_ clearing the interrupt flag.
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* This fixes a race condition.
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*/
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/* Changes from version 1.4 to version 1.5:
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*
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* Abort now calls done when multiple commands are enabled.
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*
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* Clear busy when aborted command finishes, not when abort is called.
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*
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* More debugging messages for aborts.
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*/
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/* Changes from version 1.3 to version 1.4:
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*
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* Enable automatic request of sense data on error (requires newer version
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* of scsi.c to be useful).
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*
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* Fix PORT_OVERRIDE for 14F.
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*
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* Fix abort and reset to work properly (config.aborted wasn't cleared
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* after it was tested, so after a command abort no further commands would
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* work).
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*
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* Boot time test to enable SCSI bus reset (defaults to not allowing reset).
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*
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* Fix test for OGM busy -- the busy bit is in different places on the 24F.
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*
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* Release ICM slot by clearing first byte on 24F.
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*/
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#include <linux/stddef.h>
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#include <linux/string.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/ioport.h>
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#include <asm/io.h>
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#include <asm/bitops.h>
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#include <asm/system.h>
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#include <asm/dma.h>
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#define ULTRASTOR_PRIVATE /* Get the private stuff from ultrastor.h */
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#include "../block/blk.h"
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#include "scsi.h"
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#include "hosts.h"
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#include "ultrastor.h"
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#define FALSE 0
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#define TRUE 1
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#ifndef ULTRASTOR_DEBUG
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#define ULTRASTOR_DEBUG (UD_ABORT|UD_CSIR|UD_RESET)
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#endif
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#define VERSION "1.11 alpha"
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#define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr)[0])
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#define PACKED __attribute__((packed))
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#define ALIGNED(x) __attribute__((aligned(x)))
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/* The 14F uses an array of 4-byte ints for its scatter/gather list.
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The data can be unaligned, but need not be. It's easier to give
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the list normal alignment since it doesn't need to fit into a
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packed structure. */
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typedef struct {
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unsigned int address;
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unsigned int num_bytes;
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} ultrastor_sg_list;
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/* MailBox SCSI Command Packet. Basic command structure for communicating
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with controller. */
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struct mscp {
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unsigned char opcode: 3; /* type of command */
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unsigned char xdir: 2; /* data transfer direction */
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unsigned char dcn: 1; /* disable disconnect */
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unsigned char ca: 1; /* use cache (if available) */
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unsigned char sg: 1; /* scatter/gather operation */
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unsigned char target_id: 3; /* target SCSI id */
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unsigned char ch_no: 2; /* SCSI channel (always 0 for 14f) */
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unsigned char lun: 3; /* logical unit number */
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unsigned int transfer_data PACKED; /* transfer data pointer */
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unsigned int transfer_data_length PACKED; /* length in bytes */
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unsigned int command_link PACKED; /* for linking command chains */
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unsigned char scsi_command_link_id; /* identifies command in chain */
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unsigned char number_of_sg_list; /* (if sg is set) 8 bytes per list */
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unsigned char length_of_sense_byte;
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unsigned char length_of_scsi_cdbs; /* 6, 10, or 12 */
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unsigned char scsi_cdbs[12]; /* SCSI commands */
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unsigned char adapter_status; /* non-zero indicates HA error */
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unsigned char target_status; /* non-zero indicates target error */
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unsigned int sense_data PACKED;
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/* The following fields are for software only. They are included in
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the MSCP structure because they are associated with SCSI requests. */
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void (*done)(Scsi_Cmnd *);
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Scsi_Cmnd *SCint;
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ultrastor_sg_list sglist[ULTRASTOR_14F_MAX_SG];
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};
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/* Port addresses (relative to the base address) */
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#define U14F_PRODUCT_ID(port) ((port) + 0x4)
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#define CONFIG(port) ((port) + 0x6)
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/* Port addresses relative to the doorbell base address. */
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#define LCL_DOORBELL_MASK(port) ((port) + 0x0)
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#define LCL_DOORBELL_INTR(port) ((port) + 0x1)
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#define SYS_DOORBELL_MASK(port) ((port) + 0x2)
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#define SYS_DOORBELL_INTR(port) ((port) + 0x3)
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/* Used to store configuration info read from config i/o registers. Most of
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this is not used yet, but might as well save it.
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This structure also holds port addresses that are not at the same offset
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on the 14F and 24F.
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This structure holds all data that must be duplicated to support multiple
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adapters. */
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static struct ultrastor_config
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{
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unsigned short port_address; /* base address of card */
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unsigned short doorbell_address; /* base address of doorbell CSRs */
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unsigned short ogm_address; /* base address of OGM */
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unsigned short icm_address; /* base address of ICM */
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const void *bios_segment;
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unsigned char interrupt: 4;
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unsigned char dma_channel: 3;
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unsigned char bios_drive_number: 1;
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unsigned char heads;
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unsigned char sectors;
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unsigned char ha_scsi_id: 3;
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unsigned char subversion: 4;
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unsigned char revision;
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/* The slot number is used to distinguish the 24F (slot != 0) from
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the 14F and 34F (slot == 0). */
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unsigned char slot;
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#ifdef PRINT_U24F_VERSION
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volatile int csir_done;
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#endif
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/* Our index in the host adapter array maintained by higher-level driver */
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int host_number;
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/* A pool of MSCP structures for this adapter, and a bitmask of
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busy structures. (If ULTRASTOR_14F_MAX_CMDS == 1, a 1 byte
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busy flag is used instead.) */
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#if ULTRASTOR_MAX_CMDS == 1
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unsigned char mscp_busy;
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#else
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unsigned short mscp_free;
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#endif
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volatile unsigned char aborted[ULTRASTOR_MAX_CMDS];
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struct mscp mscp[ULTRASTOR_MAX_CMDS];
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} config = {0};
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/* Set this to 1 to reset the SCSI bus on error. */
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int ultrastor_bus_reset = 0;
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/* Allowed BIOS base addresses (NULL indicates reserved) */
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static const void *const bios_segment_table[8] = {
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NULL, (void *)0xC4000, (void *)0xC8000, (void *)0xCC000,
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(void *)0xD0000, (void *)0xD4000, (void *)0xD8000, (void *)0xDC000,
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};
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/* Allowed IRQs for 14f */
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static const unsigned char interrupt_table_14f[4] = { 15, 14, 11, 10 };
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/* Allowed DMA channels for 14f (0 indicates reserved) */
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static const unsigned char dma_channel_table_14f[4] = { 5, 6, 7, 0 };
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/* Head/sector mappings allowed by 14f */
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static const struct {
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unsigned char heads;
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unsigned char sectors;
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} mapping_table[4] = { { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 } };
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#ifndef PORT_OVERRIDE
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/* ??? A probe of address 0x310 screws up NE2000 cards */
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static const unsigned short ultrastor_ports_14f[] = {
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0x330, 0x340, /*0x310,*/ 0x230, 0x240, 0x210, 0x130, 0x140,
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};
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#endif
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static void ultrastor_interrupt(int cpl);
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static inline void build_sg_list(struct mscp *, Scsi_Cmnd *SCpnt);
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static inline int find_and_clear_bit_16(unsigned short *field)
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{
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int rv;
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cli();
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if (*field == 0) panic("No free mscp");
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asm("xorl %0,%0\n0:\tbsfw %1,%w0\n\tbtr %0,%1\n\tjnc 0b"
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: "=&r" (rv), "=m" (*field) : "1" (*field));
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sti();
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return rv;
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}
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/* This asm is fragile: it doesn't work without the casts and it may
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not work without optimization. Maybe I should add a swap builtin
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to gcc. --jfc */
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static inline unsigned char xchgb(unsigned char reg,
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volatile unsigned char *mem)
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{
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asm("xchgb %0,%1" :
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"=r" (reg), "=m" (*(unsigned char *)mem) :
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"0" (reg), "1" (*(unsigned char *)mem));
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return reg;
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}
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#if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
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static void log_ultrastor_abort(register struct ultrastor_config *config,
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int command)
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{
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static char fmt[80] = "abort %d (%x); MSCP free pool: %x;";
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register int i;
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int flags;
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save_flags(flags);
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cli();
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for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
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{
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fmt[20 + i*2] = ' ';
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if (! (config->mscp_free & (1 << i)))
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fmt[21 + i*2] = '0' + config->mscp[i].target_id;
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else
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fmt[21 + i*2] = '-';
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}
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fmt[20 + ULTRASTOR_MAX_CMDS * 2] = '\n';
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fmt[21 + ULTRASTOR_MAX_CMDS * 2] = 0;
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printk(fmt, command, &config->mscp[command], config->mscp_free);
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restore_flags(flags);
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}
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#endif
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static int ultrastor_14f_detect(int hostnum)
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{
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size_t i;
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unsigned char in_byte, version_byte = 0;
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struct config_1 {
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unsigned char bios_segment: 3;
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unsigned char removable_disks_as_fixed: 1;
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unsigned char interrupt: 2;
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unsigned char dma_channel: 2;
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} config_1;
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struct config_2 {
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unsigned char ha_scsi_id: 3;
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unsigned char mapping_mode: 2;
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unsigned char bios_drive_number: 1;
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unsigned char tfr_port: 2;
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} config_2;
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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printk("US14F: detect: called\n");
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#endif
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/* If a 24F has already been configured, don't look for a 14F. */
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if (config.bios_segment)
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return FALSE;
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#ifdef PORT_OVERRIDE
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if(check_region(PORT_OVERRIDE, 0xc)) {
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printk("Ultrastor I/O space already in use\n");
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return FALSE;
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};
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config.port_address = PORT_OVERRIDE;
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#else
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for (i = 0; i < ARRAY_SIZE(ultrastor_ports_14f); i++) {
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if(check_region(ultrastor_ports_14f[i], 0x0c)) continue;
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config.port_address = ultrastor_ports_14f[i];
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#endif
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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printk("US14F: detect: testing port address %03X\n", config.port_address);
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#endif
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in_byte = inb(U14F_PRODUCT_ID(config.port_address));
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if (in_byte != US14F_PRODUCT_ID_0) {
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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# ifdef PORT_OVERRIDE
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printk("US14F: detect: wrong product ID 0 - %02X\n", in_byte);
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# else
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printk("US14F: detect: no adapter at port %03X\n", config.port_address);
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# endif
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#endif
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#ifdef PORT_OVERRIDE
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return FALSE;
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#else
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continue;
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#endif
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}
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in_byte = inb(U14F_PRODUCT_ID(config.port_address) + 1);
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/* Only upper nibble is significant for Product ID 1 */
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if ((in_byte & 0xF0) != US14F_PRODUCT_ID_1) {
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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# ifdef PORT_OVERRIDE
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printk("US14F: detect: wrong product ID 1 - %02X\n", in_byte);
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# else
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printk("US14F: detect: no adapter at port %03X\n", config.port_address);
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# endif
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#endif
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#ifdef PORT_OVERRIDE
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return FALSE;
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#else
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continue;
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#endif
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}
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version_byte = in_byte;
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#ifndef PORT_OVERRIDE
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break;
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}
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if (i == ARRAY_SIZE(ultrastor_ports_14f)) {
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# if (ULTRASTOR_DEBUG & UD_DETECT)
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printk("US14F: detect: no port address found!\n");
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# endif
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return FALSE;
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}
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#endif
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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printk("US14F: detect: adapter found at port address %03X\n",
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config.port_address);
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#endif
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/* Set local doorbell mask to disallow bus reset unless
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ultrastor_bus_reset is true. */
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outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(config.port_address));
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/* All above tests passed, must be the right thing. Get some useful
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info. */
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snarf_region(config.port_address, 0x0c); /* Register the I/O space that we use */
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*(char *)&config_1 = inb(CONFIG(config.port_address + 0));
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*(char *)&config_2 = inb(CONFIG(config.port_address + 1));
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config.bios_segment = bios_segment_table[config_1.bios_segment];
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config.doorbell_address = config.port_address;
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config.ogm_address = config.port_address + 0x8;
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config.icm_address = config.port_address + 0xC;
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config.interrupt = interrupt_table_14f[config_1.interrupt];
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config.ha_scsi_id = config_2.ha_scsi_id;
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config.heads = mapping_table[config_2.mapping_mode].heads;
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config.sectors = mapping_table[config_2.mapping_mode].sectors;
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config.bios_drive_number = config_2.bios_drive_number;
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config.subversion = (version_byte & 0x0F);
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if (config.subversion == U34F)
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config.dma_channel = 0;
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else
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config.dma_channel = dma_channel_table_14f[config_1.dma_channel];
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if (!config.bios_segment) {
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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printk("US14F: detect: not detected.\n");
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#endif
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return FALSE;
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}
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|
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/* Final consistancy check, verify previous info. */
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if (config.subversion != U34F)
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if (!config.dma_channel || !(config_2.tfr_port & 0x2)) {
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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printk("US14F: detect: consistancy check failed\n");
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#endif
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return FALSE;
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}
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|
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/* If we were TRULY paranoid, we could issue a host adapter inquiry
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command here and verify the data returned. But frankly, I'm
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exhausted! */
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|
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/* Finally! Now I'm satisfied... */
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#if (ULTRASTOR_DEBUG & UD_DETECT)
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printk("US14F: detect: detect succeeded\n"
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" Port address: %03X\n"
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" BIOS segment: %05X\n"
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" Interrupt: %u\n"
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" DMA channel: %u\n"
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" H/A SCSI ID: %u\n"
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" Subversion: %u\n",
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config.port_address, config.bios_segment, config.interrupt,
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config.dma_channel, config.ha_scsi_id, config.subversion);
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#endif
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|
config.host_number = hostnum;
|
|
scsi_hosts[hostnum].this_id = config.ha_scsi_id;
|
|
scsi_hosts[hostnum].unchecked_isa_dma = (config.subversion != U34F);
|
|
|
|
#if ULTRASTOR_MAX_CMDS > 1
|
|
config.mscp_free = ~0;
|
|
#endif
|
|
|
|
if (request_irq(config.interrupt, ultrastor_interrupt)) {
|
|
printk("Unable to allocate IRQ%u for UltraStor controller.\n",
|
|
config.interrupt);
|
|
return FALSE;
|
|
}
|
|
if (config.dma_channel && request_dma(config.dma_channel)) {
|
|
printk("Unable to allocate DMA channel %u for UltraStor controller.\n",
|
|
config.dma_channel);
|
|
free_irq(config.interrupt);
|
|
return FALSE;
|
|
}
|
|
scsi_hosts[hostnum].sg_tablesize = ULTRASTOR_14F_MAX_SG;
|
|
printk("UltraStor driver version" VERSION ". Using %d SG lists.\n",
|
|
ULTRASTOR_14F_MAX_SG);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int ultrastor_24f_detect(int hostnum)
|
|
{
|
|
register int i;
|
|
|
|
#if (ULTRASTOR_DEBUG & UD_DETECT)
|
|
printk("US24F: detect");
|
|
#endif
|
|
|
|
/* probe each EISA slot at slot address C80 */
|
|
for (i = 1; i < 15; i++)
|
|
{
|
|
unsigned char config_1, config_2;
|
|
unsigned short addr = (i << 12) | ULTRASTOR_24F_PORT;
|
|
|
|
if (inb(addr) != US24F_PRODUCT_ID_0 &&
|
|
inb(addr+1) != US24F_PRODUCT_ID_1 &&
|
|
inb(addr+2) != US24F_PRODUCT_ID_2)
|
|
continue;
|
|
|
|
config.revision = inb(addr+3);
|
|
config.slot = i;
|
|
if (! (inb(addr+4) & 1))
|
|
{
|
|
#if (ULTRASTOR_DEBUG & UD_DETECT)
|
|
printk("U24F: found disabled card in slot %u\n", i);
|
|
#endif
|
|
continue;
|
|
}
|
|
#if (ULTRASTOR_DEBUG & UD_DETECT)
|
|
printk("U24F: found card in slot %u\n", i);
|
|
#endif
|
|
config_1 = inb(addr + 5);
|
|
config.bios_segment = bios_segment_table[config_1 & 7];
|
|
switch(config_1 >> 4)
|
|
{
|
|
case 1:
|
|
config.interrupt = 15;
|
|
break;
|
|
case 2:
|
|
config.interrupt = 14;
|
|
break;
|
|
case 4:
|
|
config.interrupt = 11;
|
|
break;
|
|
case 8:
|
|
config.interrupt = 10;
|
|
break;
|
|
default:
|
|
printk("U24F: invalid IRQ\n");
|
|
return FALSE;
|
|
}
|
|
if (request_irq(config.interrupt, ultrastor_interrupt))
|
|
{
|
|
printk("Unable to allocate IRQ%u for UltraStor controller.\n",
|
|
config.interrupt);
|
|
return FALSE;
|
|
}
|
|
/* BIOS addr set */
|
|
/* base port set */
|
|
config.port_address = addr;
|
|
config.doorbell_address = addr + 12;
|
|
config.ogm_address = addr + 0x17;
|
|
config.icm_address = addr + 0x1C;
|
|
config_2 = inb(addr + 7);
|
|
config.ha_scsi_id = config_2 & 7;
|
|
config.heads = mapping_table[(config_2 >> 3) & 3].heads;
|
|
config.sectors = mapping_table[(config_2 >> 3) & 3].sectors;
|
|
#if (ULTRASTOR_DEBUG & UD_DETECT)
|
|
printk("US24F: detect: detect succeeded\n"
|
|
" Port address: %03X\n"
|
|
" BIOS segment: %05X\n"
|
|
" Interrupt: %u\n"
|
|
" H/A SCSI ID: %u\n",
|
|
config.port_address, config.bios_segment,
|
|
config.interrupt, config.ha_scsi_id);
|
|
#endif
|
|
config.host_number = hostnum;
|
|
scsi_hosts[hostnum].this_id = config.ha_scsi_id;
|
|
scsi_hosts[hostnum].unchecked_isa_dma = 0;
|
|
scsi_hosts[hostnum].sg_tablesize = ULTRASTOR_14F_MAX_SG;
|
|
|
|
#if ULTRASTOR_MAX_CMDS > 1
|
|
config.mscp_free = ~0;
|
|
#endif
|
|
/* Mark ICM and OGM free */
|
|
outb(0, addr + 0x16);
|
|
outb(0, addr + 0x1B);
|
|
|
|
/* Set local doorbell mask to disallow bus reset unless
|
|
ultrastor_bus_reset is true. */
|
|
outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(addr+12));
|
|
outb(0x02, SYS_DOORBELL_MASK(addr+12));
|
|
printk("UltraStor driver version " VERSION ". Using %d SG lists.\n",
|
|
ULTRASTOR_14F_MAX_SG);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
int ultrastor_detect(int hostnum)
|
|
{
|
|
return ultrastor_14f_detect(hostnum) || ultrastor_24f_detect(hostnum);
|
|
}
|
|
|
|
const char *ultrastor_info(void)
|
|
{
|
|
static char buf[64];
|
|
|
|
if (config.slot)
|
|
sprintf(buf, "UltraStor 24F SCSI @ Slot %u IRQ%u\n",
|
|
config.slot, config.interrupt);
|
|
else if (config.subversion)
|
|
sprintf(buf, "UltraStor 34F SCSI @ Port %03X BIOS %05X IRQ%u\n",
|
|
config.port_address, (int)config.bios_segment,
|
|
config.interrupt);
|
|
else
|
|
sprintf(buf, "UltraStor 14F SCSI @ Port %03X BIOS %05X IRQ%u DMA%u\n",
|
|
config.port_address, (int)config.bios_segment,
|
|
config.interrupt, config.dma_channel);
|
|
return buf;
|
|
}
|
|
|
|
static inline void build_sg_list(register struct mscp *mscp, Scsi_Cmnd *SCpnt)
|
|
{
|
|
struct scatterlist *sl;
|
|
long transfer_length = 0;
|
|
int i, max;
|
|
|
|
sl = (struct scatterlist *) SCpnt->request_buffer;
|
|
max = SCpnt->use_sg;
|
|
for (i = 0; i < max; i++) {
|
|
mscp->sglist[i].address = (unsigned int)sl[i].address;
|
|
mscp->sglist[i].num_bytes = sl[i].length;
|
|
transfer_length += sl[i].length;
|
|
}
|
|
mscp->number_of_sg_list = max;
|
|
mscp->transfer_data = (unsigned int)mscp->sglist;
|
|
/* ??? May not be necessary. Docs are unclear as to whether transfer
|
|
length field is ignored or whether it should be set to the total
|
|
number of bytes of the transfer. */
|
|
mscp->transfer_data_length = transfer_length;
|
|
}
|
|
|
|
int ultrastor_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
|
|
{
|
|
register struct mscp *my_mscp;
|
|
#if ULTRASTOR_MAX_CMDS > 1
|
|
int mscp_index;
|
|
#endif
|
|
unsigned int status;
|
|
int flags;
|
|
|
|
/* Next test is for debugging; "can't happen" */
|
|
if ((config.mscp_free & ((1U << ULTRASTOR_MAX_CMDS) - 1)) == 0)
|
|
panic("ultrastor_queuecommand: no free MSCP\n");
|
|
mscp_index = find_and_clear_bit_16(&config.mscp_free);
|
|
|
|
/* Has the command been aborted? */
|
|
if (xchgb(0xff, &config.aborted[mscp_index]) != 0)
|
|
{
|
|
status = DID_ABORT << 16;
|
|
goto aborted;
|
|
}
|
|
|
|
my_mscp = &config.mscp[mscp_index];
|
|
|
|
#if 1
|
|
/* This way is faster. */
|
|
*(unsigned char *)my_mscp = OP_SCSI | (DTD_SCSI << 3);
|
|
#else
|
|
my_mscp->opcode = OP_SCSI;
|
|
my_mscp->xdir = DTD_SCSI;
|
|
my_mscp->dcn = FALSE;
|
|
#endif
|
|
/* Tape drives don't work properly if the cache is used. The SCSI
|
|
READ command for a tape doesn't have a block offset, and the adapter
|
|
incorrectly assumes that all reads from the tape read the same
|
|
blocks. Results will depend on read buffer size and other disk
|
|
activity.
|
|
|
|
??? Which other device types should never use the cache? */
|
|
my_mscp->ca = scsi_devices[SCpnt->index].type != TYPE_TAPE;
|
|
my_mscp->target_id = SCpnt->target;
|
|
my_mscp->ch_no = 0;
|
|
my_mscp->lun = SCpnt->lun;
|
|
if (SCpnt->use_sg) {
|
|
/* Set scatter/gather flag in SCSI command packet */
|
|
my_mscp->sg = TRUE;
|
|
build_sg_list(my_mscp, SCpnt);
|
|
} else {
|
|
/* Unset scatter/gather flag in SCSI command packet */
|
|
my_mscp->sg = FALSE;
|
|
my_mscp->transfer_data = (unsigned int)SCpnt->request_buffer;
|
|
my_mscp->transfer_data_length = SCpnt->request_bufflen;
|
|
}
|
|
my_mscp->command_link = 0; /*???*/
|
|
my_mscp->scsi_command_link_id = 0; /*???*/
|
|
my_mscp->length_of_sense_byte = sizeof SCpnt->sense_buffer;
|
|
my_mscp->length_of_scsi_cdbs = COMMAND_SIZE(*(unsigned char *)SCpnt->cmnd);
|
|
memcpy(my_mscp->scsi_cdbs, SCpnt->cmnd, my_mscp->length_of_scsi_cdbs);
|
|
my_mscp->adapter_status = 0;
|
|
my_mscp->target_status = 0;
|
|
my_mscp->sense_data = (unsigned int)&SCpnt->sense_buffer;
|
|
my_mscp->done = done;
|
|
my_mscp->SCint = SCpnt;
|
|
SCpnt->host_scribble = (unsigned char *)my_mscp;
|
|
|
|
/* Find free OGM slot. On 24F, look for OGM status byte == 0.
|
|
On 14F and 34F, wait for local interrupt pending flag to clear. */
|
|
|
|
retry:
|
|
if (config.slot)
|
|
while (inb(config.ogm_address - 1) != 0 &&
|
|
config.aborted[mscp_index] == 0xff);
|
|
|
|
/* else??? */
|
|
|
|
while ((inb(LCL_DOORBELL_INTR(config.doorbell_address)) &
|
|
(config.slot ? 2 : 1))
|
|
&& config.aborted[mscp_index] == 0xff);
|
|
|
|
/* To avoid race conditions, make the code to write to the adapter
|
|
atomic. This simplifies the abort code. */
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
if (inb(LCL_DOORBELL_INTR(config.doorbell_address)) &
|
|
(config.slot ? 2 : 1))
|
|
{
|
|
restore_flags(flags);
|
|
goto retry;
|
|
}
|
|
|
|
status = xchgb(0, &config.aborted[mscp_index]);
|
|
if (status != 0xff) {
|
|
restore_flags(flags);
|
|
|
|
#if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
|
|
printk("USx4F: queuecommand: aborted\n");
|
|
#if ULTRASTOR_MAX_CMDS > 1
|
|
log_ultrastor_abort(&config, mscp_index);
|
|
#endif
|
|
#endif
|
|
status <<= 16;
|
|
|
|
aborted:
|
|
set_bit(mscp_index, &config.mscp_free);
|
|
/* If the driver queues commands, call the done proc here. Otherwise
|
|
return an error. */
|
|
#if ULTRASTOR_MAX_CMDS > 1
|
|
SCpnt->result = status;
|
|
done(SCpnt);
|
|
return 0;
|
|
#else
|
|
return status;
|
|
#endif
|
|
}
|
|
|
|
/* Store pointer in OGM address bytes */
|
|
outl((unsigned int)my_mscp, config.ogm_address);
|
|
|
|
/* Issue OGM interrupt */
|
|
if (config.slot) {
|
|
/* Write OGM command register on 24F */
|
|
outb(1, config.ogm_address - 1);
|
|
outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
|
|
} else {
|
|
outb(0x1, LCL_DOORBELL_INTR(config.doorbell_address));
|
|
}
|
|
|
|
restore_flags(flags);
|
|
|
|
#if (ULTRASTOR_DEBUG & UD_COMMAND)
|
|
printk("USx4F: queuecommand: returning\n");
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This code must deal with 2 cases:
|
|
|
|
1. The command has not been written to the OGM. In this case, set
|
|
the abort flag and return.
|
|
|
|
2. The command has been written to the OGM and is stuck somewhere in
|
|
the adapter.
|
|
|
|
2a. On a 24F, ask the adapter to abort the command. It will interrupt
|
|
when it does.
|
|
|
|
2b. Call the command's done procedure.
|
|
|
|
*/
|
|
|
|
int ultrastor_abort(Scsi_Cmnd *SCpnt, int code)
|
|
{
|
|
#if ULTRASTOR_DEBUG & UD_ABORT
|
|
char out[108];
|
|
unsigned char icm_status = 0, ogm_status = 0;
|
|
unsigned int icm_addr = 0, ogm_addr = 0;
|
|
#endif
|
|
unsigned int mscp_index;
|
|
unsigned char old_aborted;
|
|
void (*done)(Scsi_Cmnd *);
|
|
|
|
if(config.slot) return 0; /* Do not attempt an abort for the 24f */
|
|
|
|
mscp_index = ((struct mscp *)SCpnt->host_scribble) - config.mscp;
|
|
if (mscp_index >= ULTRASTOR_MAX_CMDS)
|
|
panic("Ux4F aborting invalid MSCP");
|
|
|
|
#if ULTRASTOR_DEBUG & UD_ABORT
|
|
if (config.slot)
|
|
{
|
|
int port0 = (config.slot << 12) | 0xc80;
|
|
int i;
|
|
int flags;
|
|
save_flags(flags);
|
|
cli();
|
|
strcpy(out, "OGM %d:%x ICM %d:%x ports: ");
|
|
for (i = 0; i < 16; i++)
|
|
{
|
|
unsigned char p = inb(port0 + i);
|
|
out[28 + i * 3] = "0123456789abcdef"[p >> 4];
|
|
out[29 + i * 3] = "0123456789abcdef"[p & 15];
|
|
out[30 + i * 3] = ' ';
|
|
}
|
|
out[28 + i * 3] = '\n';
|
|
out[29 + i * 3] = 0;
|
|
ogm_status = inb(port0 + 22);
|
|
ogm_addr = inl(port0 + 23);
|
|
icm_status = inb(port0 + 27);
|
|
icm_addr = inl(port0 + 28);
|
|
restore_flags(flags);
|
|
}
|
|
|
|
/* First check to see if an interrupt is pending. I suspect the SiS
|
|
chipset loses interrupts. (I also suspect is mangles data, but
|
|
one bug at a time... */
|
|
if (config.slot ? inb(config.icm_address - 1) == 2 :
|
|
(inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
|
|
{
|
|
int flags;
|
|
save_flags(flags);
|
|
printk("Ux4F: abort while completed command pending\n");
|
|
restore_flags(flags);
|
|
cli();
|
|
ultrastor_interrupt(0);
|
|
restore_flags(flags);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
old_aborted = xchgb(code ? code : DID_ABORT, &config.aborted[mscp_index]);
|
|
|
|
/* aborted == 0xff is the signal that queuecommand has not yet sent
|
|
the command. It will notice the new abort flag and fail. */
|
|
if (old_aborted == 0xff)
|
|
return 0;
|
|
|
|
/* On 24F, send an abort MSCP request. The adapter will interrupt
|
|
and the interrupt handler will call done. */
|
|
if (config.slot && inb(config.ogm_address - 1) == 0)
|
|
{
|
|
int flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
outl((int)&config.mscp[mscp_index], config.ogm_address);
|
|
inb(0xc80); /* delay */
|
|
outb(0x80, config.ogm_address - 1);
|
|
outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
|
|
#if ULTRASTOR_DEBUG & UD_ABORT
|
|
log_ultrastor_abort(&config, mscp_index);
|
|
printk(out, ogm_status, ogm_addr, icm_status, icm_addr);
|
|
#endif
|
|
restore_flags(flags);
|
|
return 0;
|
|
}
|
|
|
|
#if ULTRASTOR_DEBUG & UD_ABORT
|
|
log_ultrastor_abort(&config, mscp_index);
|
|
#endif
|
|
|
|
/* Can't request a graceful abort. Either this is not a 24F or
|
|
the OGM is busy. Don't free the command -- the adapter might
|
|
still be using it. Setting SCint = 0 causes the interrupt
|
|
handler to ignore the command. */
|
|
|
|
#if ULTRASTOR_DEBUG & UD_ABORT
|
|
if (config.mscp[mscp_index].SCint != SCpnt)
|
|
printk("abort: command mismatch, %x != %x\n",
|
|
config.mscp[mscp_index].SCint, SCpnt);
|
|
#endif
|
|
if (config.mscp[mscp_index].SCint == 0)
|
|
return 1;
|
|
|
|
if (config.mscp[mscp_index].SCint != SCpnt) panic("Bad abort");
|
|
config.mscp[mscp_index].SCint = 0;
|
|
done = config.mscp[mscp_index].done;
|
|
config.mscp[mscp_index].done = 0;
|
|
SCpnt->result = DID_ABORT << 16;
|
|
/* I worry about reentrancy in scsi.c */
|
|
done(SCpnt);
|
|
|
|
/* Need to set a timeout here in case command never completes. */
|
|
return 0;
|
|
|
|
}
|
|
|
|
int ultrastor_reset(Scsi_Cmnd * SCpnt)
|
|
{
|
|
int flags;
|
|
register int i;
|
|
#if (ULTRASTOR_DEBUG & UD_RESET)
|
|
printk("US14F: reset: called\n");
|
|
#endif
|
|
|
|
if(config.slot) {
|
|
if (SCpnt) SCpnt->flags |= NEEDS_JUMPSTART;
|
|
return 0; /* Do not attempt a reset for the 24f */
|
|
};
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
|
|
/* Reset the adapter and SCSI bus. The SCSI bus reset can be
|
|
inhibited by clearing ultrastor_bus_reset before probe. */
|
|
outb(0xc0, LCL_DOORBELL_INTR(config.doorbell_address));
|
|
if (config.slot)
|
|
{
|
|
outb(0, config.ogm_address - 1);
|
|
outb(0, config.icm_address - 1);
|
|
}
|
|
|
|
#if ULTRASTOR_MAX_CMDS == 1
|
|
if (config.mscp_busy && config.mscp->done && config.mscp->SCint)
|
|
{
|
|
config.mscp->SCint->result = DID_RESET << 16;
|
|
config.mscp->done(config.mscp->SCint);
|
|
}
|
|
config.mscp->SCint = 0;
|
|
#else
|
|
for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
|
|
{
|
|
if (! (config.mscp_free & (1 << i)) &&
|
|
config.mscp[i].done && config.mscp[i].SCint)
|
|
{
|
|
config.mscp[i].SCint->result = DID_RESET << 16;
|
|
config.mscp[i].done(config.mscp[i].SCint);
|
|
config.mscp[i].done = 0;
|
|
}
|
|
config.mscp[i].SCint = 0;
|
|
}
|
|
#endif
|
|
|
|
memset((unsigned char *)config.aborted, 0, sizeof config.aborted);
|
|
#if ULTRASTOR_MAX_CMDS == 1
|
|
config.mscp_busy = 0;
|
|
#else
|
|
config.mscp_free = ~0;
|
|
#endif
|
|
|
|
restore_flags(flags);
|
|
return 0;
|
|
|
|
}
|
|
|
|
int ultrastor_biosparam(int size, int dev, int * dkinfo)
|
|
{
|
|
unsigned int s = config.heads * config.sectors;
|
|
|
|
dkinfo[0] = config.heads;
|
|
dkinfo[1] = config.sectors;
|
|
dkinfo[2] = size / s; /* Ignore partial cylinders */
|
|
#if 0
|
|
if (dkinfo[2] > 1024)
|
|
dkinfo[2] = 1024;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static void ultrastor_interrupt(int cpl)
|
|
{
|
|
unsigned int status;
|
|
#if ULTRASTOR_MAX_CMDS > 1
|
|
unsigned int mscp_index;
|
|
#endif
|
|
register struct mscp *mscp;
|
|
void (*done)(Scsi_Cmnd *);
|
|
Scsi_Cmnd *SCtmp;
|
|
|
|
#if ULTRASTOR_MAX_CMDS == 1
|
|
mscp = &config.mscp[0];
|
|
#else
|
|
mscp = (struct mscp *)inl(config.icm_address);
|
|
mscp_index = mscp - config.mscp;
|
|
if (mscp_index >= ULTRASTOR_MAX_CMDS) {
|
|
printk("Ux4F interrupt: bad MSCP address %x\n", (unsigned int) mscp);
|
|
/* A command has been lost. Reset and report an error
|
|
for all commands. */
|
|
ultrastor_reset(NULL);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/* Clean ICM slot (set ICMINT bit to 0) */
|
|
if (config.slot) {
|
|
unsigned char icm_status = inb(config.icm_address - 1);
|
|
#if ULTRASTOR_DEBUG & (UD_INTERRUPT|UD_ERROR|UD_ABORT)
|
|
if (icm_status != 1 && icm_status != 2)
|
|
printk("US24F: ICM status %x for MSCP %d (%x)\n", icm_status,
|
|
mscp_index, (unsigned int) mscp);
|
|
#endif
|
|
/* The manual says clear interrupt then write 0 to ICM status.
|
|
This seems backwards, but I'll do it anyway. --jfc */
|
|
outb(2, SYS_DOORBELL_INTR(config.doorbell_address));
|
|
outb(0, config.icm_address - 1);
|
|
if (icm_status == 4) {
|
|
printk("UltraStor abort command failed\n");
|
|
return;
|
|
}
|
|
if (icm_status == 3) {
|
|
void (*done)(Scsi_Cmnd *) = mscp->done;
|
|
if (done) {
|
|
mscp->done = 0;
|
|
mscp->SCint->result = DID_ABORT << 16;
|
|
done(mscp->SCint);
|
|
}
|
|
return;
|
|
}
|
|
} else {
|
|
outb(1, SYS_DOORBELL_INTR(config.doorbell_address));
|
|
}
|
|
|
|
SCtmp = mscp->SCint;
|
|
mscp->SCint = NULL;
|
|
|
|
if (SCtmp == 0)
|
|
{
|
|
#if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
|
|
printk("MSCP %d (%x): no command\n", mscp_index, (unsigned int) mscp);
|
|
#endif
|
|
#if ULTRASTOR_MAX_CMDS == 1
|
|
config.mscp_busy = FALSE;
|
|
#else
|
|
set_bit(mscp_index, &config.mscp_free);
|
|
#endif
|
|
config.aborted[mscp_index] = 0;
|
|
return;
|
|
}
|
|
|
|
/* Save done locally and zero before calling. This is needed as
|
|
once we call done, we may get another command queued before this
|
|
interrupt service routine can return. */
|
|
done = mscp->done;
|
|
mscp->done = 0;
|
|
|
|
/* Let the higher levels know that we're done */
|
|
switch (mscp->adapter_status)
|
|
{
|
|
case 0:
|
|
status = DID_OK << 16;
|
|
break;
|
|
case 0x01: /* invalid command */
|
|
case 0x02: /* invalid parameters */
|
|
case 0x03: /* invalid data list */
|
|
default:
|
|
status = DID_ERROR << 16;
|
|
break;
|
|
case 0x84: /* SCSI bus abort */
|
|
status = DID_ABORT << 16;
|
|
break;
|
|
case 0x91:
|
|
status = DID_TIME_OUT << 16;
|
|
break;
|
|
}
|
|
|
|
SCtmp->result = status | mscp->target_status;
|
|
|
|
SCtmp->host_scribble = 0;
|
|
|
|
/* Free up mscp block for next command */
|
|
#if ULTRASTOR_MAX_CMDS == 1
|
|
config.mscp_busy = FALSE;
|
|
#else
|
|
set_bit(mscp_index, &config.mscp_free);
|
|
#endif
|
|
|
|
#if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
|
|
if (config.aborted[mscp_index])
|
|
printk("Ux4 interrupt: MSCP %d (%x) aborted = %d\n",
|
|
mscp_index, (unsigned int) mscp, config.aborted[mscp_index]);
|
|
#endif
|
|
config.aborted[mscp_index] = 0;
|
|
|
|
if (done)
|
|
done(SCtmp);
|
|
else
|
|
printk("US14F: interrupt: unexpected interrupt\n");
|
|
|
|
if (config.slot ? inb(config.icm_address - 1) : (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
|
|
printk("Ux4F: multiple commands completed\n");
|
|
|
|
#if (ULTRASTOR_DEBUG & UD_INTERRUPT)
|
|
printk("USx4F: interrupt: returning\n");
|
|
#endif
|
|
}
|