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