FreeBSD/Linux Kernel Cross Reference
sys/dev/scsipi/scsi_tape.h

     /*      $NetBSD: scsi_tape.h,v 1.25 2008/04/28 20:23:57 martin Exp $    */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*
     * Originally 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
     */
    
    /*
     * SCSI tape interface description
     */
    
    /*
     * SCSI command formats
     */
    
    #define READ                    0x08
    #define WRITE                   0x0a
    struct scsi_rw_tape {
            u_int8_t opcode;
            u_int8_t byte2;
    #define SRW_FIXED               0x01
            u_int8_t len[3];
            u_int8_t control;
    };
    
    #define SPACE                   0x11
    struct scsi_space {
            u_int8_t opcode;
            u_int8_t byte2;
    #define SS_CODE                 0x03
    #define SP_BLKS                 0x00
    #define SP_FILEMARKS            0x01
    #define SP_SEQ_FILEMARKS        0x02
    #define SP_EOM                  0x03
            u_int8_t number[3];
            u_int8_t control;
    };
    
    #define WRITE_FILEMARKS         0x10
    struct scsi_write_filemarks {
            u_int8_t opcode;
            u_int8_t byte2;
            u_int8_t number[3];
            u_int8_t control;
    };
    
    #define REWIND                  0x01
    struct scsi_rewind {
            u_int8_t opcode;
            u_int8_t byte2;
    #define SR_IMMED                0x01
            u_int8_t unused[3];
            u_int8_t control;
    };
    
    #define LOAD                    0x1b
    struct scsi_load {
            u_int8_t opcode;
           u_int8_t byte2;
   #define SL_IMMED                0x01
           u_int8_t unused[2];
           u_int8_t how;
   #define LD_UNLOAD               0x00
   #define LD_LOAD                 0x01
   #define LD_RETENSION            0x02
           u_int8_t control;
   };
   
   #define ERASE                   0x19
   struct scsi_erase {
           u_int8_t opcode;
           u_int8_t byte2;
   #define SE_LONG                 0x01
   #define SE_IMMED                0x02
           u_int8_t unused[3];
           u_int8_t control;
   };
   
   #define READ_BLOCK_LIMITS       0x05
   struct scsi_block_limits {
           u_int8_t opcode;
           u_int8_t byte2;
           u_int8_t unused[3];
           u_int8_t control;
   };
   
   struct scsi_block_limits_data {
           u_int8_t reserved;
           u_int8_t max_length[3];         /* Most significant */
           u_int8_t min_length[2];         /* Most significant */
   };
   
   /* See SCSI-II spec 9.3.3.1 */
   struct scsi_tape_dev_conf_page {
           u_int8_t pagecode;      /* 0x10 */
           u_int8_t pagelength;    /* 0x0e */
           u_int8_t byte2;
   #define SMT_CAP                 0x40    /* change active partition */
   #define SMT_CAF                 0x20    /* change active format */
   #define SMT_AFMASK              0x1f    /* active format mask */
           u_int8_t active_partition;
           u_int8_t wb_full_ratio;
           u_int8_t rb_empty_ratio;
           u_int8_t wrdelay_time[2];
           u_int8_t byte8;
   #define SMT_DBR                 0x80    /* data buffer recovery */
   #define SMT_BIS                 0x40    /* block identifiers supported */
   #define SMT_RSMK                0x20    /* report setmarks */
   #define SMT_AVC                 0x10    /* automatic velocity control */
   #define SMT_SOCF_MASK           0xc0    /* stop on consecutive formats */
   #define SMT_RBO                 0x20    /* recover buffer order */
   #define SMT_REW                 0x10    /* report early warning */
           u_int8_t gap_size;
           u_int8_t byte10;
   #define SMT_EODDEFINED          0xe0    /* EOD defined */
   #define SMT_EEG                 0x10    /* enable EOD generation */
   #define SMT_SEW                 0x80    /* synchronize at early warning */
           u_int8_t ew_bufsize[3];
           u_int8_t sel_comp_alg;
   #define SMT_COMP_NONE           0x00
   #define SMT_COMP_DEFAULT        0x01
           u_int8_t reserved;
   };
   
   /* from SCSI-3: SSC-Rev10 (6/97) */
   struct scsi_tape_dev_compression_page {
           u_int8_t pagecode;      /* 0x0f */
           u_int8_t pagelength;    /* 0x0e */
           u_int8_t dce_dcc;
   #define DCP_DCE                 0x80    /* enable compression */
   #define DCP_DCC                 0x40    /* compression capable */
           u_int8_t dde_red;
   #define DCP_DDE                 0x80    /* enable decompression */
   /* There's a lot of gup about bits 5,6 for reporting exceptions */
   /* in transitions between compressed and uncompressed data- but */
   /* mostly we want the default (0), which is to report a MEDIUM  */
   /* ERROR when a read transitions into data that can't be de-    */
   /* compressed */
           u_int8_t comp_alg[4];           /* compression algorithm */
           u_int8_t decomp_alg[4];         /* de-"" */
           u_int8_t reserved[4];
   };
   
   /* 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
   
   #define READ_POSITION   0x34
   struct scsi_tape_read_position {
           u_int8_t opcode;
           u_int8_t byte1;                 /* set LSB to read hardware block pos */
           u_int8_t reserved[8];
   };
   
   #define LOCATE          0x2B
   struct scsi_tape_locate {
           u_int8_t opcode;
           u_int8_t byte2;
           u_int8_t reserved1;
           u_int8_t blkaddr[4];
           u_int8_t reserved2;
           u_int8_t partition;
           u_int8_t control;
   };
   
   #define HALFINCH_800    0x01
   #define HALFINCH_1600   0x02
   #define HALFINCH_6250   0x03
   #define QIC_11          0x04
   #define QIC_24          0x05
   #define QIC_120         0x0f
   #define QIC_150         0x10
   #define QIC_320         0x11
   #define QIC_525         0x11
   #define QIC_1320        0x12
   #define DDS             0x13
   #define QIC_3095        0x45
   #define QIC_3220        0x47

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