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/*
* SCSI tape interface description
*/
/*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems.
*
* 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
*
* $Id$
*/
#ifndef SCSI_SCSI_TAPE_H
#define SCSI_SCSI_TAPE_H 1
/*
* SCSI command formats
*/
struct scsi_rw_tape
{
u_char op_code;
u_char byte2;
#define SRWT_FIXED 0x01
u_char len[3];
u_char control;
};
struct scsi_space
{
u_char op_code;
u_char byte2;
#define SS_CODE 0x03
u_char number[3];
u_char control;
};
#define SP_BLKS 0
#define SP_FILEMARKS 1
#define SP_SEQ_FILEMARKS 2
#define SP_EOM 3
struct scsi_write_filemarks
{
u_char op_code;
u_char byte2;
u_char number[3];
u_char control;
};
struct scsi_rewind
{
u_char op_code;
u_char byte2;
#define SR_IMMED 0x01
u_char unused[3];
u_char control;
};
/*
** Tape erase - AKL: Andreas Klemm <andreas@knobel.gun.de>
*/
struct scsi_erase
{
u_char op_code;
u_char byte2;
#define SE_LONG 0x01 /*
** Archive Viper 2525 doesn't allow short
** erase, other tapes possibly don't allow
** that, too.
*/
#define SE_IMMED 0x02
u_char unused[3];
u_char control;
};
struct scsi_load
{
u_char op_code;
u_char byte2;
#define SL_IMMED 0x01
u_char unused[2];
u_char how;
u_char control;
};
#define LD_UNLOAD 0
#define LD_LOAD 1
#define LD_RETEN 2
struct scsi_blk_limits
{
u_char op_code;
u_char byte2;
u_char unused[3];
u_char control;
};
/*
* Opcodes
*/
#define REWIND 0x01
#define READ_BLK_LIMITS 0x05
#define READ_COMMAND_TAPE 0x08
#define WRITE_COMMAND_TAPE 0x0a
#define WRITE_FILEMARKS 0x10
#define SPACE 0x11
#define ERASE 0x19
#define LOAD_UNLOAD 0x1b
struct scsi_blk_limits_data
{
u_char reserved;
u_char max_length_2; /* Most significant */
u_char max_length_1;
u_char max_length_0; /* Least significant */
u_char min_length_1; /* Most significant */
u_char min_length_0; /* Least significant */
};
/* defines for the device specific byte in the mode select/sense header */
#define SMH_DSP_SPEED 0x0F
#define SMH_DSP_BUFF_MODE 0x70
#define SMH_DSP_BUFF_MODE_OFF 0x00
#define SMH_DSP_BUFF_MODE_ON 0x10
#define SMH_DSP_BUFF_MODE_MLTI 0x20
#define SMH_DSP_WRITE_PROT 0x80
/* A special for the CIPHER ST150S(old drive) */
struct blk_desc_cipher
{
u_char density;
u_char nblocks[3];
u_char reserved;
u_char blklen[3];
u_char other;
#define ST150_SEC 0x01 /* soft error count */
#define SR150_AUI 0x02 /* autoload inhibit */
};
/*
* This structure defines the various mode pages that tapes know about.
*/
#define PAGE_HEADERLEN 2
struct tape_pages
{
u_char pg_code; /* page code */
#define ST_PAGE_CONFIGURATION 0x10
#define ST_PAGE_MEDIUM_PART 0x11
#define ST_PAGE_MEDIUM_PART2 0x12
#define ST_PAGE_MEDIUM_PART3 0x13
#define ST_PAGE_MEDIUM_PART4 0x14
#define ST_P_CODE 0x3F /* page code */
#define ST_P_PS 0x80 /* page savable */
u_char pg_length; /* page length */
union
{
struct
{
u_char active_format; /* active format for density*/
#define ST_P_CAP 0x40 /* change active Partition */
#define ST_P_CAF 0x20 /* change active format */
#define ST_P_AF 0x1F /* active format */
u_char active_partition; /* */
u_char write_buffer_full_ratio; /* highwater writing*/
u_char read_buffer_empty_ratio; /* lowwater reading*/
u_char write_delay_high; /* # 100mSecs before flush*/
u_char write_delay_low; /* of buffer to the media */
u_char flags1; /* various single bit flags */
#define ST_P_DBR 0x80 /* supports data-buffer recovery */
#define ST_P_BIS 0x40 /* supports Block_ID */
#define ST_P_RSmk 0x20 /* Reports setmarks during reads and spaces */
#define ST_P_AVC 0x10 /* Supports Automatic Velocity Control */
#define ST_P_SOCF 0x0C /* Stop On Consecutive Filemarks, */
#define ST_P_RBO 0x02 /* Recoverd Buffered Data order, 1 = LIFO */
#define ST_P_REW 0x01 /* Report Early Warning (see SEW) */
u_char gap_size; /*I/B gap, 1=min 0=default */
u_char flags2; /* various single bit flags */
#define ST_P_EOD 0xE0 /* What is and EOD....*/
#define ST_P_EOD_DEF 0x00 /* Drive's default */
#define ST_P_EOD_FMT 0x20 /* define by format */
#define ST_P_EOD_SOCF 0x40 /* define by SOCF (above) */
#define ST_P_EEG 0x10 /* use EOD above */
#define ST_P_SEW 0x04 /* Synchronise at Early warning.. flush buffers*/
u_char early_warn_high;/* buf size at early warning */
u_char early_warn_med; /* after early warning, only */
u_char early_warn_low; /* buufer this much data */
u_char data_compress_alg; /* 0 = off, 1 = default */
u_char reserved; /* The standard says so */
} configuration;
struct
{
#define ST_MAXPARTS 16 /*for now*/
u_char max_add_parts; /* that drive allows */
u_char parts_defined; /* max min(ST_MAXPARTS,max_add_parts) */
u_char flags;
#define ST_P_FDP 0x80
#define ST_P_SDP 0x40
#define ST_P_IDP 0x20
#define ST_P_PSUM 0x18 /* units of part defs.. */
#define ST_P_PSUM_BYTES 0x0 /* units of part defs.. */
#define ST_P_PSUM_KBYTES 0x08 /* units of part defs.. */
#define ST_P_PSUM_MBYTES 0x10 /* units of part defs.. */
u_char medium_format_recog;
#define ST_P_REC_NONE 0x00
#define ST_P_REC_FMT 0x01 /* can recognise format of new media */
#define ST_P_REC_PART 0x02 /* can recognise partitions of new media */
#define ST_P_REC_FMT_PART 0x03 /* can recognise format and parts */
u_char reserved1;
u_char reserved2;
struct
{
u_char high;
u_char low;
}part[ST_MAXPARTS];
} medium_partition;
struct
{
struct
{
u_char high;
u_char low;
}part[ST_MAXPARTS];
} medium_partition_extra;
}pages;
};
#endif /*SCSI_SCSI_TAPE_H*/
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