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Annotation of Net2/scsi/scsi_changer.h, revision 1.1.1.2

1.1       root        1: /*
                      2:  * SCSI changer interface description
1.1.1.2 ! root        3:  *
1.1       root        4:  * Written by Stefan Grefen   ([email protected] soon [email protected])
                      5:  * based on the SCSI System by written Julian Elischer ([email protected])
                      6:  * for TRW Financial Systems.
                      7:  *
                      8:  * TRW Financial Systems, in accordance with their agreement with Carnegie
                      9:  * Mellon University, makes this software available to CMU to distribute
                     10:  * or use in any manner that they see fit as long as this message is kept with 
                     11:  * the software. For this reason TFS also grants any other persons or
                     12:  * organisations permission to use or modify this software.
                     13:  *
                     14:  * TFS supplies this software to be publicly redistributed
                     15:  * on the understanding that TFS is not responsible for the correct
                     16:  * functioning of this software in any circumstances.
                     17:  *
1.1.1.2 ! root       18:  *     scsi_changer.h,v 1.2 1993/05/20 03:46:30 cgd Exp
1.1       root       19:  */
                     20: 
                     21: /*
                     22:  * Ported to run under 386BSD by Julian Elischer ([email protected]) Sept 1992
                     23:  */
                     24: 
                     25: /*
                     26:  * SCSI command format
                     27:  */
                     28: struct scsi_read_element_status
                     29: {
                     30:         u_char  op_code;
                     31:        u_char  element_type_code:4;
                     32:        u_char  voltag:1;
                     33:         u_char  lun:3;
                     34:        u_char  starting_element_addr[2];
                     35:        u_char  number_of_elements[2];
                     36:        u_char  resv1;
                     37:        u_char  allocation_length[3];
                     38:        u_char  resv2;
                     39:         u_char  link:1;
                     40:         u_char  flag:1;
                     41:         u_char  :6;
                     42: };
                     43: #define RE_ALL_ELEMENTS                        0
                     44: #define RE_MEDIUM_TRANSPORT_ELEMENT    1
                     45: #define RE_STORAGE_ELEMENT             2
                     46: #define RE_IMPORT_EXPORT               3
                     47: #define RE_DATA_TRANSFER_ELEMENT       4
                     48: 
                     49: struct scsi_move_medium
                     50: {
                     51:        u_char  op_code;
                     52:        u_char  :5;
                     53:        u_char  lun:3;
                     54:        u_char  transport_element_address[2];
                     55:        u_char  source_address[2];
                     56:        u_char  destination_address[2];
                     57:        u_char  rsvd[2];
                     58:        u_char  invert:1;
                     59:        u_char  :7;
                     60:         u_char  link:1;
                     61:         u_char  flag:1;
                     62:         u_char  :6;
                     63: };
                     64: 
                     65: struct scsi_position_to_element
                     66: {
                     67:        u_char  op_code;
                     68:        u_char  :5;
                     69:        u_char  lun:3;
                     70:        u_char  transport_element_address[2];
                     71:        u_char  source_address[2];
                     72:        u_char  rsvd[2];
                     73:        u_char  invert:1;
                     74:        u_char  :7;
                     75:         u_char  link:1;
                     76:         u_char  flag:1;
                     77:         u_char  :6;
                     78: };
                     79:        
                     80: /*
                     81:  * Opcodes
                     82:  */
                     83: #define POSITION_TO_ELEMENT     0x2b
                     84: #define MOVE_MEDIUM             0xa5
                     85: #define READ_ELEMENT_STATUS     0xb8
                     86: 
                     87: struct scsi_element_status_data 
                     88: {
                     89:        u_char  first_element_reported[2];
                     90:        u_char  number_of_elements_reported[2];
                     91:        u_char  rsvd;
                     92:        u_char  byte_count_of_report[3];
                     93: };
                     94: 
                     95: struct element_status_page 
                     96: {
                     97:        u_char  element_type_code;
                     98:        u_char  :5;
                     99:        u_char avoltag:1;
                    100:        u_char pvoltag:1;
                    101:        u_char element_descriptor_length[2];
                    102:        u_char rsvd;
                    103:        u_char byte_count_of_descriptor_data[3];
                    104: };
                    105: 

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