scsi_tape.h

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    1 /*
    2  * SCSI tape interface description
    3  */
    4 
    5 /*
    6  * Written by Julian Elischer (julian@tfs.com)
    7  * for TRW Financial Systems.
    8  *
    9  * TRW Financial Systems, in accordance with their agreement with Carnegie
   10  * Mellon University, makes this software available to CMU to distribute
   11  * or use in any manner that they see fit as long as this message is kept with
   12  * the software. For this reason TFS also grants any other persons or
   13  * organisations permission to use or modify this software.
   14  *
   15  * TFS supplies this software to be publicly redistributed
   16  * on the understanding that TFS is not responsible for the correct
   17  * functioning of this software in any circumstances.
   18  *
   19  */
   20 
   21 /*
   22  * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
   23  *
   24  * $FreeBSD: src/sys/scsi/scsi_tape.h,v 1.16.6.1 1999/09/05 08:21:45 peter Exp $
   25  */
   26 #ifndef SCSI_SCSI_TAPE_H
   27 #define SCSI_SCSI_TAPE_H 1
   28 
   29 
   30 
   31 /*
   32  * SCSI command formats
   33  */
   34 
   35 
   36 struct scsi_rw_tape
   37 {
   38         u_char  op_code;
   39         u_char  byte2;
   40 #define SRWT_FIXED      0x01
   41         u_char  len[3];
   42         u_char  control;
   43 };
   44 
   45 struct scsi_space
   46 {
   47         u_char  op_code;
   48         u_char  byte2;
   49 #define SS_CODE 0x03
   50         u_char  number[3];
   51         u_char  control;
   52 };
   53 #define SP_BLKS 0
   54 #define SP_FILEMARKS 1
   55 #define SP_SEQ_FILEMARKS 2
   56 #define SP_EOM  3
   57 
   58 struct scsi_write_filemarks
   59 {
   60         u_char  op_code;
   61         u_char  byte2;
   62         u_char  number[3];
   63         u_char  control;
   64 };
   65 
   66 struct scsi_rewind
   67 {
   68         u_char  op_code;
   69         u_char  byte2;
   70 #define SR_IMMED        0x01
   71         u_char  unused[3];
   72         u_char  control;
   73 };
   74 
   75 /*
   76 ** Tape erase - AKL: Andreas Klemm <andreas@knobel.gun.de>
   77 */
   78 struct scsi_erase
   79 {
   80         u_char  op_code;
   81         u_char  byte2;
   82 #define SE_LONG         0x01    /*
   83                                 ** Archive Viper 2525 doesn't allow short
   84                                 ** erase, other tapes possibly don't allow
   85                                 ** that, too.
   86                                 */
   87 #define SE_IMMED        0x02
   88         u_char  unused[3];
   89         u_char  control;
   90 };
   91 
   92 struct scsi_load
   93 {
   94         u_char  op_code;
   95         u_char  byte2;
   96 #define SL_IMMED        0x01
   97         u_char  unused[2];
   98         u_char  how;
   99         u_char  control;
  100 };
  101 #define LD_UNLOAD 0
  102 #define LD_LOAD 1
  103 #define LD_RETEN 2
  104 
  105 
  106 struct scsi_blk_limits
  107 {
  108         u_char  op_code;
  109         u_char  byte2;
  110         u_char  unused[3];
  111         u_char  control;
  112 };
  113 
  114 /*
  115  * Opcodes
  116  */
  117 
  118 #define REWIND                  0x01
  119 #define READ_BLK_LIMITS         0x05
  120 #define READ_COMMAND_TAPE       0x08
  121 #define WRITE_COMMAND_TAPE      0x0a
  122 #define WRITE_FILEMARKS         0x10
  123 #define SPACE                   0x11
  124 #define ERASE                   0x19
  125 #define LOAD_UNLOAD             0x1b
  126 
  127 
  128 
  129 struct scsi_blk_limits_data
  130 {
  131         u_char  reserved;
  132         u_char  max_length_2;   /* Most significant */
  133         u_char  max_length_1;
  134         u_char  max_length_0;   /* Least significant */
  135         u_char  min_length_1;   /* Most significant */
  136         u_char  min_length_0;   /* Least significant */
  137 };
  138 
  139 /* defines for the device specific byte in the mode select/sense header */
  140 #define SMH_DSP_SPEED           0x0F
  141 #define SMH_DSP_BUFF_MODE       0x70
  142 #define SMH_DSP_BUFF_MODE_OFF   0x00
  143 #define SMH_DSP_BUFF_MODE_ON    0x10
  144 #define SMH_DSP_BUFF_MODE_MLTI  0x20
  145 #define SMH_DSP_WRITE_PROT      0x80
  146 
  147 /* A special for the CIPHER ST150S(old drive) */
  148 struct  blk_desc_cipher
  149 {
  150         u_char  density;
  151         u_char  nblocks[3];
  152         u_char  reserved;
  153         u_char  blklen[3];
  154         u_char  other;
  155 #define ST150_SEC       0x01    /* soft error count */
  156 #define SR150_AUI       0x02    /* autoload inhibit */
  157 };
  158 
  159 /*
  160  * This structure defines the various mode pages that tapes know about.
  161  */
  162 #define PAGE_HEADERLEN 2
  163 struct  tape_pages
  164 {
  165         u_char pg_code; /* page code    */
  166 #define ST_PAGE_CONFIGURATION   0x10
  167 #define ST_PAGE_MEDIUM_PART     0x11
  168 #define ST_PAGE_MEDIUM_PART2    0x12
  169 #define ST_PAGE_MEDIUM_PART3    0x13
  170 #define ST_PAGE_MEDIUM_PART4    0x14
  171 #define ST_P_CODE       0x3F    /* page code */
  172 #define ST_P_PS 0x80            /* page savable */
  173         u_char pg_length;       /* page length  */
  174         union
  175         {
  176                 struct
  177                 {
  178                         u_char active_format;   /* active format for density*/
  179 #define ST_P_CAP 0x40   /* change active Partition */
  180 #define ST_P_CAF 0x20   /* change active format */
  181 #define ST_P_AF  0x1F   /* active format */
  182                         u_char active_partition; /* */
  183                         u_char write_buffer_full_ratio; /* highwater writing*/
  184                         u_char read_buffer_empty_ratio; /* lowwater reading*/
  185                         u_char write_delay_high; /* # 100mSecs before flush*/
  186                         u_char write_delay_low; /* of buffer to the media */
  187                         u_char flags1;          /* various single bit flags */
  188 #define ST_P_DBR        0x80 /* supports data-buffer recovery */
  189 #define ST_P_BIS        0x40 /* supports Block_ID */
  190 #define ST_P_RSmk       0x20 /* Reports setmarks during reads and spaces */
  191 #define ST_P_AVC        0x10 /* Supports Automatic Velocity Control */
  192 #define ST_P_SOCF       0x0C /* Stop On Consecutive Filemarks, */
  193 #define ST_P_RBO        0x02 /* Recoverd Buffered Data order, 1 = LIFO */
  194 #define ST_P_REW        0x01 /* Report Early Warning (see SEW) */
  195                         u_char gap_size;        /*I/B gap,  1=min 0=default */
  196                         u_char flags2;          /* various single bit flags */
  197 #define ST_P_EOD        0xE0 /* What is and EOD....*/
  198 #define ST_P_EOD_DEF    0x00 /* Drive's default */
  199 #define ST_P_EOD_FMT    0x20 /* define by format */
  200 #define ST_P_EOD_SOCF   0x40 /* define by SOCF (above) */
  201 #define ST_P_EEG        0x10 /* use EOD above */
  202 #define ST_P_SEW        0x04 /* Synchronise at Early warning.. flush buffers*/
  203                         u_char  early_warn_high;/* buf size at early warning */
  204                         u_char  early_warn_med; /* after early warning, only */
  205                         u_char  early_warn_low; /* buufer this much data */
  206                         u_char  data_compress_alg; /* 0 = off, 1 = default */
  207                         u_char  reserved;       /* The standard says so */
  208                 } configuration;
  209                 struct
  210                 {
  211 #define ST_MAXPARTS 16 /*for now*/
  212                         u_char  max_add_parts; /* that drive allows */
  213                         u_char  parts_defined; /* max min(ST_MAXPARTS,max_add_parts) */
  214                         u_char  flags;
  215 #define ST_P_FDP 0x80
  216 #define ST_P_SDP 0x40
  217 #define ST_P_IDP 0x20
  218 #define ST_P_PSUM 0x18  /* units of part defs.. */
  219 #define ST_P_PSUM_BYTES         0x0     /* units of part defs.. */
  220 #define ST_P_PSUM_KBYTES        0x08    /* units of part defs.. */
  221 #define ST_P_PSUM_MBYTES        0x10    /* units of part defs.. */
  222                         u_char  medium_format_recog;
  223 #define ST_P_REC_NONE 0x00
  224 #define ST_P_REC_FMT 0x01       /* can recognise format of new media */
  225 #define ST_P_REC_PART 0x02  /* can recognise partitions of new media */
  226 #define ST_P_REC_FMT_PART 0x03  /* can recognise format and parts */
  227                         u_char  reserved1;
  228                         u_char  reserved2;
  229                         struct
  230                         {
  231                                 u_char  high;
  232                                 u_char  low;
  233                         }part[ST_MAXPARTS];
  234                 } medium_partition;
  235                 struct
  236                 {
  237                         struct
  238                         {
  239                                 u_char  high;
  240                                 u_char  low;
  241                         }part[ST_MAXPARTS];
  242                 } medium_partition_extra;
  243         }pages;
  244 };
  245 
  246 
  247 #endif /*SCSI_SCSI_TAPE_H*/

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FreeBSD/Linux Kernel Cross Reference sys/scsi/scsi_tape.h

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sys/scsi/scsi_tape.h