126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
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/*
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* Copyright (c) 1992 The Regents of the University of California.
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* All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratories.
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*
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* %sccs.include.redist.c%
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*
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* %W% (Berkeley) %G%
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*
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* from: Header: tape.h,v 1.3 92/12/02 03:53:14 torek Exp (LBL)
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* $Id: tape.h,v 1.1 1993/10/27 17:48:47 deraadt Exp $
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*/
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/*
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* SCSI definitions for Sequential Access Devices (tapes).
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*
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* Commands defined in common headers (scsi.h or disktape.h) are omitted.
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*/
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#define CMD_REWIND 0x01 /* rewind */
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#define CMD_READ_BLOCK_LIMITS 0x05 /* read block limits */
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#define CMD_READ 0x08 /* read */
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#define CMD_WRITE 0x0a /* write */
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#define CMD_TRACK_SELECT 0x0b /* track select */
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#define CMD_READ_REVERSE 0x0f /* read reverse */
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#define CMD_WRITE_FILEMARK 0x10 /* write file marks */
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#define CMD_SPACE 0x11 /* space */
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#define CMD_VERIFY 0x13 /* verify */
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#define CMD_RBD 0x14 /* recover buffered data */
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#define CMD_RESERVE_UNIT 0x16 /* reserve unit */
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#define CMD_RELEASE_UNIT 0x17 /* release unit */
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/* CMD_COPY 0x18 copy (common to all scsi devs) */
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#define CMD_ERASE 0x19 /* erase */
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#define CMD_LOAD_UNLOAD 0x1b /* load/unload */
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#define CMD_PAMR 0x1e /* prevent/allow medium removal */
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/*
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* Structure of READ, WRITE, READ REVERSE, RECOVER BUFFERED DATA
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* commands (i.e., the cdb).
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* Also used for VERIFY commands.
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*/
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struct scsi_cdb_rw {
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u_char cdb_cmd, /* 0x08 or 0x0a or 0x0f or 0x13 or 0x14 */
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cdb_lun_bf, /* LUN + reserved + bytecmp + fixed */
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cdb_lenh, /* transfer length (MSB) */
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cdb_lenm, /* transfer length */
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cdb_lenl, /* transfer length (LSB) */
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cdb_ctrl; /* control byte */
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};
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#define SCSI_RW_BYTECMP 0x02 /* byte compare flag if verify */
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#define SCSI_RW_FIXEDBLK 0x01 /* fixed block size for read/write */
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/*
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* Structure of a TRACK SELECT command.
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*/
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struct scsi_cdb_ts {
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u_char cdb_cmd, /* 0x0b */
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cdb_lun_xxx, /* logical unit number + reserved */
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cdb_xxx1, /* reserved */
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cdb_xxx2, /* reserved */
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cdb_track, /* track value */
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cdb_ctrl; /* control byte */
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};
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/*
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* Structure of a WRITE FILEMARKS command.
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*/
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struct scsi_cdb_wfm {
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u_char cdb_cmd, /* 0x0b */
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cdb_lun_xxx, /* logical unit number + reserved */
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cdb_nfh, /* number of filemarks (MSB) */
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cdb_nfm, /* number of filemarks */
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cdb_nfl, /* number of filemarks (LSB) */
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cdb_ctrl; /* control byte */
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};
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/*
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* Structure of a SPACE command.
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*/
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struct scsi_cdb_space {
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u_char cdb_cmd, /* 0x0b */
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cdb_lun_code, /* LUN + reserved + 2-bit code */
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cdb_counth, /* count (MSB) */
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cdb_countm, /* count */
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cdb_countl, /* count (LSB) */
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cdb_ctrl; /* control byte */
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};
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#define SCSI_CMD_SPACE_BLOCKS 0 /* skip blocks */
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#define SCSI_CMD_SPACE_FMS 1 /* skip file marks */
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#define SCSI_CMD_SPACE_SFMS 2 /* skip sequential file marks */
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#define SCSI_CMD_SPACE_PEOD 3 /* skip to physical end of data */
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/*
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* Structure of an ERASE command.
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*/
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struct scsi_cdb_erase {
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u_char cdb_cmd, /* 0x0b */
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cdb_lun_long, /* LUN + reserved + long-erase flag */
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cdb_xxx1, /* reserved */
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cdb_xxx2, /* reserved */
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cdb_xxx3, /* reserved */
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cdb_ctrl; /* control byte */
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};
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/*
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* Structure of a LOAD/UNLOAD command.
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*/
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struct scsi_cdb_lu {
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u_char cdb_cmd, /* 0x1b */
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cdb_lun_immed, /* LUN + reserved + immediate flag */
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cdb_xxx1, /* reserved */
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cdb_xxx2, /* reserved */
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cdb_rl, /* reserved + retension flag + load flag */
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cdb_ctrl; /* control byte */
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};
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#define SCSI_LU_RL_RETEN 0x02 /* retension */
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#define SCSI_LU_RL_LOAD 0x01 /* load */
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#define SCSI_LU_RL_UNLOAD 0x00 /* unload (pseudo flag) */
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