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/*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*
* $Id: scsiconf.h,v 2.4 93/10/16 00:59:13 julian Exp Locker: julian $
*/
#ifndef SCSI_SCSICONF_H
#define SCSI_SCSICONF_H 1
typedef int boolean;
typedef int errval;
typedef long int int32;
typedef short int int16;
typedef char int8;
typedef unsigned long int u_int32;
typedef unsigned short int u_int16;
typedef unsigned char u_int8;
#include <scsi/scsi_debug.h>
/*
* The following documentation tries to describe the relationship between the
* various structures defined in this file:
*
* each adapter type has a scsi_adapter struct. This describes the adapter and
* identifies routines that can be called to use the adapter.
* each device type has a scsi_device struct. This describes the device and
* identifies routines that can be called to use the device.
* each existing device position (scsibus + target + lun)
* can be described by a scsi_link struct.
* Only scsi positions that actually have devices, have a scsi_link
* structure assigned. so in effect each device has scsi_link struct.
* The scsi_link structure contains information identifying both the
* device driver and the adapter driver for that position on that scsi bus,
* and can be said to 'link' the two.
* each individual scsi bus has an array that points to all the scsi_link
* structs associated with that scsi bus. Slots with no device have
* a NULL pointer.
* each individual device also knows the address of it's own scsi_link
* structure.
*
* -------------
*
* The key to all this is the scsi_link structure which associates all the
* other structures with each other in the correct configuration. The
* scsi_link is the connecting information that allows each part of the
* scsi system to find the associated other parts.
*/
/*
* These entrypoints are called by the high-end drivers to get services from
* whatever low-end drivers they are attached to each adapter type has one of
* these statically allocated.
*/
struct scsi_adapter
{
/* 04*/ int32 (*scsi_cmd)();
/* 08*/ void (*scsi_minphys)();
/* 12*/ int32 (*open_target_lu)();
/* 16*/ int32 (*close_target_lu)();
/* 20*/ u_int32 (*adapter_info)(); /* see definitions below */
/* 24*/ char *name; /* name of scsi bus controller */
/* 32*/ u_long spare[2];
};
/*
* return values for scsi_cmd()
*/
#define SUCCESSFULLY_QUEUED 0
#define TRY_AGAIN_LATER 1
#define COMPLETE 2
#define HAD_ERROR 3 /* do not use this, use COMPLETE */
#define ESCAPE_NOT_SUPPORTED 4
/*
* Format of adapter_info() response data
* e.g. maximum number of entries queuable to a device by the adapter
*/
#define AD_INF_MAX_CMDS 0x000000FF
/* 24 bits of other adapter characteristics go here */
/*
* These entry points are called by the low-end drivers to get services from
* whatever high-end drivers they are attached to. Each device type has one
* of these statically allocated.
*/
struct scsi_device
{
/* 4*/ errval (*err_handler)(); /* returns -1 to say err processing complete */
/* 8*/ void (*start)();
/* 12*/ int32 (*async)();
/* 16*/ int32 (*done)(); /* returns -1 to say done processing complete */
/* 20*/ char *name; /* name of device type */
/* 24*/ u_int32 flags; /* device type dependent flags */
/* 32*/ int32 spare[2];
};
/*
* This structure describes the connection between an adapter driver and
* a device driver, and is used by each to call services provided by
* the other, and to allow generic scsi glue code to call these services
* as well.
*/
struct scsi_link
{
/* 1*/ u_int8 target; /* targ of this dev */
/* 2*/ u_int8 lun; /* lun of this dev */
/* 3*/ u_int8 adapter_targ; /* what are we on the scsi bus */
/* 4*/ u_int8 adapter_unit; /* e.g. the 0 in aha0 */
/* 5*/ u_int8 scsibus; /* the Nth scsibus */
/* 6*/ u_int8 dev_unit; /* e.g. the 0 in sd0 */
/* 7*/ u_int8 opennings; /* available operations */
/* 8*/ u_int8 active; /* operations in progress */
/* 10*/ u_int16 flags; /* flags that all devices have */
/* 12*/ u_int8 spareb[2]; /* unused */
/* 16*/ struct scsi_adapter *adapter; /* adapter entry points etc. */
/* 20*/ struct scsi_device *device; /* device entry points etc. */
/* 24*/ struct scsi_xfer *active_xs; /* operations under way */
/* 28*/ void * fordriver; /* for private use by the driver */
/* 32*/ u_int32 spare;
};
#define SDEV_MEDIA_LOADED 0x01 /* device figures are still valid */
#define SDEV_WAITING 0x02 /* a process is waiting for this */
#define SDEV_OPEN 0x04 /* at least 1 open session */
#define SDEV_DBX 0xF0 /* debuging flags (scsi_debug.h) */
/*
* One of these is allocated and filled in for each scsi bus.
* it holds pointers to allow the scsi bus to get to the driver
* That is running each LUN on the bus
* it also has a template entry which is the prototype struct
* supplied by the adapter driver, this is used to initialise
* the others, before they have the rest of the fields filled in
*/
struct scsibus_data {
struct scsi_link *adapter_link; /* prototype supplied by adapter */
struct scsi_link *sc_link[8][8];
};
/*
* Each scsi transaction is fully described by one of these structures
* It includes information about the source of the command and also the
* device and adapter for which the command is destined.
* (via the scsi_link structure) *
*/
struct scsi_xfer
{
/*04*/ struct scsi_xfer *next; /* when free */
/*08*/ u_int32 flags;
/*12*/ struct scsi_link *sc_link; /* all about our device and adapter */
/*13*/ u_int8 retries; /* the number of times to retry */
/*16*/ u_int8 spare[3];
/*20*/ int32 timeout; /* in milliseconds */
/*24*/ struct scsi_generic *cmd; /* The scsi command to execute */
/*28*/ int32 cmdlen; /* how long it is */
/*32*/ u_char *data; /* dma address OR a uio address */
/*36*/ int32 datalen; /* data len (blank if uio) */
/*40*/ int32 resid; /* how much buffer was not touched */
/*44*/ int32 error; /* an error value */
/*48*/ struct buf *bp; /* If we need to associate with a buf */
/*80*/ struct scsi_sense_data sense; /* 32 bytes*/
/*
* Believe it or not, Some targets fall on the ground with
* anything but a certain sense length.
*/
/*84*/ int32 req_sense_length; /* Explicit request sense length */
/*88*/ int32 status; /* SCSI status */
/*100*/ struct scsi_generic cmdstore; /* stash the command in here */
};
/*
* Per-request Flag values
*/
#define SCSI_NOSLEEP 0x01 /* Not a user... don't sleep */
#define SCSI_NOMASK 0x02 /* dont allow interrupts.. booting */
#define SCSI_NOSTART 0x04 /* left over from ancient history */
#define SCSI_USER 0x08 /* Is a user cmd, call scsi_user_done */
#define ITSDONE 0x10 /* the transfer is as done as it gets */
#define INUSE 0x20 /* The scsi_xfer block is in use */
#define SCSI_SILENT 0x40 /* Don't report errors to console */
#define SCSI_ERR_OK 0x80 /* An error on this operation is OK. */
#define SCSI_RESET 0x100 /* Reset the device in question */
#define SCSI_DATA_UIO 0x200 /* The data address refers to a UIO */
#define SCSI_DATA_IN 0x400 /* expect data to come INTO memory */
#define SCSI_DATA_OUT 0x800 /* expect data to flow OUT of memory */
#define SCSI_TARGET 0x1000 /* This defines a TARGET mode op. */
#define SCSI_ESCAPE 0x2000 /* Escape operation */
/*
* Escape op codes. This provides an extensible setup for operations
* that are not scsi commands. They are intended for modal operations.
*/
#define SCSI_OP_TARGET 0x0001
#define SCSI_OP_RESET 0x0002
#define SCSI_OP_BDINFO 0x0003
/*
* Error values an adapter driver may return
*/
#define XS_NOERROR 0x0 /* there is no error, (sense is invalid) */
#define XS_SENSE 0x1 /* Check the returned sense for the error */
#define XS_DRIVER_STUFFUP 0x2 /* Driver failed to perform operation */
#define XS_TIMEOUT 0x03 /* The device timed out.. turned off? */
#define XS_SWTIMEOUT 0x04 /* The Timeout reported was caught by SW */
#define XS_BUSY 0x08 /* The device busy, try again later? */
void scsi_attachdevs __P((struct scsi_link *sc_link_proto));
struct scsi_xfer *get_xs( struct scsi_link *sc_link, u_int32 flags);
void free_xs(struct scsi_xfer *xs, struct scsi_link *sc_link,u_int32 flags);
u_int32 scsi_size( struct scsi_link *sc_link,u_int32 flags);
errval scsi_test_unit_ready( struct scsi_link *sc_link, u_int32 flags);
errval scsi_change_def( struct scsi_link *sc_link, u_int32 flags);
errval scsi_inquire( struct scsi_link *sc_link,
struct scsi_inquiry_data *inqbuf, u_int32 flags);
errval scsi_prevent( struct scsi_link *sc_link, u_int32 type,u_int32 flags);
errval scsi_start_unit( struct scsi_link *sc_link, u_int32 flags);
void scsi_done(struct scsi_xfer *xs);
errval scsi_scsi_cmd( struct scsi_link *sc_link, struct scsi_generic *scsi_cmd,
u_int32 cmdlen, u_char *data_addr,
u_int32 datalen, u_int32 retries,
u_int32 timeout, struct buf *bp,
u_int32 flags);
errval scsi_do_ioctl __P((struct scsi_link *sc_link, int cmd, caddr_t addr, int f));
void show_scsi_xs(struct scsi_xfer *xs);
void show_scsi_cmd(struct scsi_xfer *xs);
void show_mem(unsigned char * , u_int32);
void lto3b __P((int val, u_char *bytes));
int _3btol __P((u_char *bytes));
#endif /*SCSI_SCSICONF_H*/
/* END OF FILE */
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