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Annotation of Net2/scsi/scsi_changer.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * HISTORY
        !             3:  *
        !             4:  * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
        !             5:  * --------------------         -----   ----------------------
        !             6:  * CURRENT PATCH LEVEL:         1       00098
        !             7:  * --------------------         -----   ----------------------
        !             8:  *
        !             9:  * 16 Feb 93   Julian Elischer         ADDED for SCSI system
        !            10:  * 
        !            11:  */
        !            12: 
        !            13: /*
        !            14:  * SCSI changer interface description
        !            15:  */
        !            16: 
        !            17: /*
        !            18:  * Written by Stefan Grefen   ([email protected] soon [email protected])
        !            19:  * based on the SCSI System by written Julian Elischer ([email protected])
        !            20:  * for TRW Financial Systems.
        !            21:  *
        !            22:  * TRW Financial Systems, in accordance with their agreement with Carnegie
        !            23:  * Mellon University, makes this software available to CMU to distribute
        !            24:  * or use in any manner that they see fit as long as this message is kept with 
        !            25:  * the software. For this reason TFS also grants any other persons or
        !            26:  * organisations permission to use or modify this software.
        !            27:  *
        !            28:  * TFS supplies this software to be publicly redistributed
        !            29:  * on the understanding that TFS is not responsible for the correct
        !            30:  * functioning of this software in any circumstances.
        !            31:  *
        !            32:  */
        !            33: 
        !            34: /*
        !            35:  * Ported to run under 386BSD by Julian Elischer ([email protected]) Sept 1992
        !            36:  */
        !            37: 
        !            38: /*
        !            39:  * SCSI command format
        !            40:  */
        !            41: struct scsi_read_element_status
        !            42: {
        !            43:         u_char  op_code;
        !            44:        u_char  element_type_code:4;
        !            45:        u_char  voltag:1;
        !            46:         u_char  lun:3;
        !            47:        u_char  starting_element_addr[2];
        !            48:        u_char  number_of_elements[2];
        !            49:        u_char  resv1;
        !            50:        u_char  allocation_length[3];
        !            51:        u_char  resv2;
        !            52:         u_char  link:1;
        !            53:         u_char  flag:1;
        !            54:         u_char  :6;
        !            55: };
        !            56: #define RE_ALL_ELEMENTS                        0
        !            57: #define RE_MEDIUM_TRANSPORT_ELEMENT    1
        !            58: #define RE_STORAGE_ELEMENT             2
        !            59: #define RE_IMPORT_EXPORT               3
        !            60: #define RE_DATA_TRANSFER_ELEMENT       4
        !            61: 
        !            62: struct scsi_move_medium
        !            63: {
        !            64:        u_char  op_code;
        !            65:        u_char  :5;
        !            66:        u_char  lun:3;
        !            67:        u_char  transport_element_address[2];
        !            68:        u_char  source_address[2];
        !            69:        u_char  destination_address[2];
        !            70:        u_char  rsvd[2];
        !            71:        u_char  invert:1;
        !            72:        u_char  :7;
        !            73:         u_char  link:1;
        !            74:         u_char  flag:1;
        !            75:         u_char  :6;
        !            76: };
        !            77: 
        !            78: struct scsi_position_to_element
        !            79: {
        !            80:        u_char  op_code;
        !            81:        u_char  :5;
        !            82:        u_char  lun:3;
        !            83:        u_char  transport_element_address[2];
        !            84:        u_char  source_address[2];
        !            85:        u_char  rsvd[2];
        !            86:        u_char  invert:1;
        !            87:        u_char  :7;
        !            88:         u_char  link:1;
        !            89:         u_char  flag:1;
        !            90:         u_char  :6;
        !            91: };
        !            92:        
        !            93: /*
        !            94:  * Opcodes
        !            95:  */
        !            96: #define POSITION_TO_ELEMENT     0x2b
        !            97: #define MOVE_MEDIUM             0xa5
        !            98: #define READ_ELEMENT_STATUS     0xb8
        !            99: 
        !           100: struct scsi_element_status_data 
        !           101: {
        !           102:        u_char  first_element_reported[2];
        !           103:        u_char  number_of_elements_reported[2];
        !           104:        u_char  rsvd;
        !           105:        u_char  byte_count_of_report[3];
        !           106: };
        !           107: 
        !           108: struct element_status_page 
        !           109: {
        !           110:        u_char  element_type_code;
        !           111:        u_char  :5;
        !           112:        u_char avoltag:1;
        !           113:        u_char pvoltag:1;
        !           114:        u_char element_descriptor_length[2];
        !           115:        u_char rsvd;
        !           116:        u_char byte_count_of_descriptor_data[3];
        !           117: };
        !           118: 

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