250 lines
9.8 KiB
C
250 lines
9.8 KiB
C
/*
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* Written by Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems for use under the MACH(2.5) operating system.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
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*
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* $Id: scsiconf.h,v 1.8 1993/12/19 00:54:55 wollman Exp $
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*/
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#ifndef SCSI_SCSICONF_H
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#define SCSI_SCSICONF_H 1
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typedef int boolean;
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typedef int errval;
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typedef long int int32;
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typedef short int int16;
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typedef char int8;
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typedef unsigned long int u_int32;
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typedef unsigned short int u_int16;
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typedef unsigned char u_int8;
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#include <scsi/scsi_debug.h>
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/*
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* The following documentation tries to describe the relationship between the
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* various structures defined in this file:
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*
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* each adapter type has a scsi_adapter struct. This describes the adapter and
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* identifies routines that can be called to use the adapter.
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* each device type has a scsi_device struct. This describes the device and
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* identifies routines that can be called to use the device.
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* each existing device position (scsibus + target + lun)
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* can be described by a scsi_link struct.
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* Only scsi positions that actually have devices, have a scsi_link
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* structure assigned. so in effect each device has scsi_link struct.
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* The scsi_link structure contains information identifying both the
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* device driver and the adapter driver for that position on that scsi bus,
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* and can be said to 'link' the two.
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* each individual scsi bus has an array that points to all the scsi_link
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* structs associated with that scsi bus. Slots with no device have
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* a NULL pointer.
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* each individual device also knows the address of it's own scsi_link
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* structure.
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*
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* -------------
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*
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* The key to all this is the scsi_link structure which associates all the
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* other structures with each other in the correct configuration. The
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* scsi_link is the connecting information that allows each part of the
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* scsi system to find the associated other parts.
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*/
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/*
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* These entrypoints are called by the high-end drivers to get services from
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* whatever low-end drivers they are attached to each adapter type has one of
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* these statically allocated.
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*/
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struct scsi_adapter
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{
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/* 04*/ int32 (*scsi_cmd)();
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/* 08*/ void (*scsi_minphys)();
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/* 12*/ int32 (*open_target_lu)();
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/* 16*/ int32 (*close_target_lu)();
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/* 20*/ u_int32 (*adapter_info)(); /* see definitions below */
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/* 24*/ char *name; /* name of scsi bus controller */
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/* 32*/ u_long spare[2];
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};
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/*
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* return values for scsi_cmd()
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*/
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#define SUCCESSFULLY_QUEUED 0
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#define TRY_AGAIN_LATER 1
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#define COMPLETE 2
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#define HAD_ERROR 3 /* do not use this, use COMPLETE */
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#define ESCAPE_NOT_SUPPORTED 4
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/*
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* Format of adapter_info() response data
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* e.g. maximum number of entries queuable to a device by the adapter
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*/
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#define AD_INF_MAX_CMDS 0x000000FF
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/* 24 bits of other adapter characteristics go here */
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/*
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* These entry points are called by the low-end drivers to get services from
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* whatever high-end drivers they are attached to. Each device type has one
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* of these statically allocated.
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*/
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struct scsi_device
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{
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/* 4*/ errval (*err_handler)(); /* returns -1 to say err processing complete */
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/* 8*/ void (*start)();
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/* 12*/ int32 (*async)();
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/* 16*/ int32 (*done)(); /* returns -1 to say done processing complete */
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/* 20*/ char *name; /* name of device type */
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/* 24*/ u_int32 flags; /* device type dependent flags */
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/* 32*/ int32 spare[2];
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};
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/*
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* This structure describes the connection between an adapter driver and
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* a device driver, and is used by each to call services provided by
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* the other, and to allow generic scsi glue code to call these services
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* as well.
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*/
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struct scsi_link
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{
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/* 1*/ u_int8 target; /* targ of this dev */
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/* 2*/ u_int8 lun; /* lun of this dev */
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/* 3*/ u_int8 adapter_targ; /* what are we on the scsi bus */
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/* 4*/ u_int8 adapter_unit; /* e.g. the 0 in aha0 */
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/* 5*/ u_int8 scsibus; /* the Nth scsibus */
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/* 6*/ u_int8 dev_unit; /* e.g. the 0 in sd0 */
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/* 7*/ u_int8 opennings; /* available operations */
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/* 8*/ u_int8 active; /* operations in progress */
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/* 10*/ u_int16 flags; /* flags that all devices have */
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/* 12*/ u_int8 spareb[2]; /* unused */
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/* 16*/ struct scsi_adapter *adapter; /* adapter entry points etc. */
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/* 20*/ struct scsi_device *device; /* device entry points etc. */
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/* 24*/ struct scsi_xfer *active_xs; /* operations under way */
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/* 28*/ void * fordriver; /* for private use by the driver */
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/* 32*/ u_int32 spare;
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};
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#define SDEV_MEDIA_LOADED 0x01 /* device figures are still valid */
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#define SDEV_WAITING 0x02 /* a process is waiting for this */
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#define SDEV_OPEN 0x04 /* at least 1 open session */
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#define SDEV_BOUNCE 0x08 /* unit requires DMA bounce buffer */
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#define SDEV_DBX 0xF0 /* debuging flags (scsi_debug.h) */
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/*
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* One of these is allocated and filled in for each scsi bus.
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* it holds pointers to allow the scsi bus to get to the driver
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* That is running each LUN on the bus
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* it also has a template entry which is the prototype struct
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* supplied by the adapter driver, this is used to initialise
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* the others, before they have the rest of the fields filled in
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*/
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struct scsibus_data {
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struct scsi_link *adapter_link; /* prototype supplied by adapter */
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struct scsi_link *sc_link[8][8];
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};
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/*
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* Each scsi transaction is fully described by one of these structures
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* It includes information about the source of the command and also the
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* device and adapter for which the command is destined.
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* (via the scsi_link structure) *
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*/
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struct scsi_xfer
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{
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/*04*/ struct scsi_xfer *next; /* when free */
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/*08*/ u_int32 flags;
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/*12*/ struct scsi_link *sc_link; /* all about our device and adapter */
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/*13*/ u_int8 retries; /* the number of times to retry */
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/*16*/ u_int8 spare[3];
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/*20*/ int32 timeout; /* in milliseconds */
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/*24*/ struct scsi_generic *cmd; /* The scsi command to execute */
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/*28*/ int32 cmdlen; /* how long it is */
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/*32*/ u_char *data; /* dma address OR a uio address */
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/*36*/ int32 datalen; /* data len (blank if uio) */
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/*40*/ int32 resid; /* how much buffer was not touched */
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/*44*/ int32 error; /* an error value */
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/*48*/ struct buf *bp; /* If we need to associate with a buf */
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/*80*/ struct scsi_sense_data sense; /* 32 bytes*/
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/*
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* Believe it or not, Some targets fall on the ground with
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* anything but a certain sense length.
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*/
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/*84*/ int32 req_sense_length; /* Explicit request sense length */
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/*88*/ int32 status; /* SCSI status */
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/*100*/ struct scsi_generic cmdstore; /* stash the command in here */
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};
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/*
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* Per-request Flag values
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*/
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#define SCSI_NOSLEEP 0x01 /* Not a user... don't sleep */
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#define SCSI_NOMASK 0x02 /* dont allow interrupts.. booting */
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#define SCSI_NOSTART 0x04 /* left over from ancient history */
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#define SCSI_USER 0x08 /* Is a user cmd, call scsi_user_done */
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#define ITSDONE 0x10 /* the transfer is as done as it gets */
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#define INUSE 0x20 /* The scsi_xfer block is in use */
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#define SCSI_SILENT 0x40 /* Don't report errors to console */
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#define SCSI_ERR_OK 0x80 /* An error on this operation is OK. */
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#define SCSI_RESET 0x100 /* Reset the device in question */
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#define SCSI_DATA_UIO 0x200 /* The data address refers to a UIO */
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#define SCSI_DATA_IN 0x400 /* expect data to come INTO memory */
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#define SCSI_DATA_OUT 0x800 /* expect data to flow OUT of memory */
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#define SCSI_TARGET 0x1000 /* This defines a TARGET mode op. */
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#define SCSI_ESCAPE 0x2000 /* Escape operation */
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/*
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* Escape op codes. This provides an extensible setup for operations
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* that are not scsi commands. They are intended for modal operations.
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*/
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#define SCSI_OP_TARGET 0x0001
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#define SCSI_OP_RESET 0x0002
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#define SCSI_OP_BDINFO 0x0003
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/*
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* Error values an adapter driver may return
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*/
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#define XS_NOERROR 0x0 /* there is no error, (sense is invalid) */
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#define XS_SENSE 0x1 /* Check the returned sense for the error */
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#define XS_DRIVER_STUFFUP 0x2 /* Driver failed to perform operation */
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#define XS_TIMEOUT 0x03 /* The device timed out.. turned off? */
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#define XS_SWTIMEOUT 0x04 /* The Timeout reported was caught by SW */
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#define XS_BUSY 0x08 /* The device busy, try again later? */
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void scsi_attachdevs __P((struct scsi_link *sc_link_proto));
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struct scsi_xfer *get_xs( struct scsi_link *sc_link, u_int32 flags);
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void free_xs(struct scsi_xfer *xs, struct scsi_link *sc_link,u_int32 flags);
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u_int32 scsi_size( struct scsi_link *sc_link,u_int32 flags);
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errval scsi_test_unit_ready( struct scsi_link *sc_link, u_int32 flags);
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errval scsi_change_def( struct scsi_link *sc_link, u_int32 flags);
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errval scsi_inquire( struct scsi_link *sc_link,
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struct scsi_inquiry_data *inqbuf, u_int32 flags);
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errval scsi_prevent( struct scsi_link *sc_link, u_int32 type,u_int32 flags);
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errval scsi_start_unit( struct scsi_link *sc_link, u_int32 flags);
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void scsi_done(struct scsi_xfer *xs);
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errval scsi_scsi_cmd( struct scsi_link *sc_link, struct scsi_generic *scsi_cmd,
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u_int32 cmdlen, u_char *data_addr,
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u_int32 datalen, u_int32 retries,
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u_int32 timeout, struct buf *bp,
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u_int32 flags);
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errval scsi_do_ioctl __P((struct scsi_link *sc_link, int cmd, caddr_t addr, int f));
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void show_scsi_xs(struct scsi_xfer *xs);
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void show_scsi_cmd(struct scsi_xfer *xs);
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void show_mem(unsigned char * , u_int32);
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void lto3b __P((int val, u_char *bytes));
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int _3btol __P((u_char *bytes));
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extern void sc_print_addr(struct scsi_link *);
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#endif /*SCSI_SCSICONF_H*/
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/* END OF FILE */
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