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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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scsi.h
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1989-07-02
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/*
* scsi.h --
*
* Declarations of the user level interface to SCSI devices. The
* interface defined in this file allows user level programs to
* send arbitrary SCSI commands to SCSI devices. The interface
* users Sprite Io_Controls to send the SCSI command block and
* a data buffer to the device. The SCSI status byte, command data,
* and any sense data is returned using the
* out buffer of the Io_Control. The IO_COntrols defined in this
* file should work with any SCSI device (ie SCSI Disk, SCSI Tape,
* SCSI Worm, etc) as well as the HBA device driver.
*
* Copyright 1989 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*
* $Header: /sprite/src/lib/include/dev/RCS/scsi.h,v 1.1 89/04/12 21:03:58 mendel Exp Locker: mendel $ SPRITE (Berkeley)
*/
#ifndef _DEVSCSI
#define _DEVSCSI
/*
* Scsi-device specific commands:
*
* IOC_SCSI_COMMAND Issue a SCSI command
*/
#define IOC_SCSI (7 << 16)
#define IOC_SCSI_COMMAND (IOC_SCSI | 0x1)
/*
* IOC_SCSI_COMMAND
* The one IN parameter specifies the SCSI command block, data buffer,
* and data transfer direction.
*/
typedef struct Dev_ScsiCommand {
int bufferLen; /* The length of the data buffer in bytes. */
int dataOffset; /* Offset into the in IO Control input buffer
* of the start of the data buffer. If
* dataOffset equals the size of the input
* buffer then the commands is assumed to
* receive data and the data is returned
* in the output buffer. */
int commandLen; /* Length in bytes of the SCSI command block. */
/*
* The SCSI command block immediately follows the Dev_ScsiCommand
* structure and extends for commandLen bytes. The input data for
* the command starts at dataOffset-sizeof(Dev_ScsiCommand) and
* extends to the end of the input buffer. The input data should start
* on a 32 bit word boundry.
*/
} Dev_ScsiCommand;
/*
* IOC_SCSI_COMMAND returns in the output parameter the scsi Status
* block.
*/
typedef struct Dev_ScsiStatus {
int statusByte; /* Scsi status byte as returned by the
* device. */
int amountTransferred; /* Number of data bytes transferred by the
* command. If the command received data
* then the data follows the Dev_ScsiStatus
* structure. */
int senseDataLen; /* The number of bytes of sense data returned
* by the device. The sense data immediately
* follows the received data in
* the output buffer. */
} Dev_ScsiStatus;
#endif /* _DEVSCSI */