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1.1 root 1: /*
2: * SCSI tape interface description
1.1.1.2 ! root 3: *
1.1 root 4: * Written by Julian Elischer ([email protected])
5: * for TRW Financial Systems.
6: *
7: * TRW Financial Systems, in accordance with their agreement with Carnegie
8: * Mellon University, makes this software available to CMU to distribute
9: * or use in any manner that they see fit as long as this message is kept with
10: * the software. For this reason TFS also grants any other persons or
11: * organisations permission to use or modify this software.
12: *
13: * TFS supplies this software to be publicly redistributed
14: * on the understanding that TFS is not responsible for the correct
15: * functioning of this software in any circumstances.
16: *
1.1.1.2 ! root 17: * scsi_tape.h,v 1.2 1993/05/20 03:46:34 cgd Exp
1.1 root 18: */
19:
20: /*
21: * Ported to run under 386BSD by Julian Elischer ([email protected]) Sept 1992
22: */
23:
24: /*
25: * SCSI command format
26: */
27:
28:
29: struct scsi_rw_tape
30: {
31: u_char op_code;
32: u_char fixed:1;
33: u_char :4;
34: u_char lun:3;
35: u_char len[3];
36: u_char link:1;
37: u_char flag:1;
38: u_char :6;
39: } rw_tape;
40:
41: struct scsi_space
42: {
43: u_char op_code;
44: u_char code:2;
45: u_char :3;
46: u_char lun:3;
47: u_char number[3];
48: u_char link:1;
49: u_char flag:1;
50: u_char :6;
51: } space;
52: #define SP_BLKS 0
53: #define SP_FILEMARKS 1
54: #define SP_SEQ_FILEMARKS 2
55: #define SP_EOM 3
56:
57: struct scsi_write_filemarks
58: {
59: u_char op_code;
60: u_char :5;
61: u_char lun:3;
62: u_char number[3];
63: u_char link:1;
64: u_char flag:1;
65: u_char :6;
66: } write_filemarks;
67:
68: struct scsi_rewind
69: {
70: u_char op_code;
71: u_char immed:1;
72: u_char :4;
73: u_char lun:3;
74: u_char unused[3];
75: u_char link:1;
76: u_char flag:1;
77: u_char :6;
78: } rewind;
79:
80: struct scsi_load
81: {
82: u_char op_code;
83: u_char immed:1;
84: u_char :4;
85: u_char lun:3;
86: u_char unused[2];
87: u_char load:1;
88: u_char reten:1;
89: u_char :6;
90: u_char link:1;
91: u_char flag:1;
92: u_char :6;
93: } load;
94: #define LD_UNLOAD 0
95: #define LD_LOAD 1
96:
97: struct scsi_blk_limits
98: {
99: u_char op_code;
100: u_char :5;
101: u_char lun:3;
102: u_char unused[3];
103: u_char link:1;
104: u_char flag:1;
105: u_char :6;
106: } blk_limits;
107:
108: /*
109: * Opcodes
110: */
111:
112: #define REWIND 0x01
113: #define READ_BLK_LIMITS 0x05
114: #define READ_COMMAND_TAPE 0x08
115: #define WRITE_COMMAND_TAPE 0x0a
116: #define WRITE_FILEMARKS 0x10
117: #define SPACE 0x11
118: #define LOAD_UNLOAD 0x1b /* same as above */
119:
120:
121:
122: struct scsi_blk_limits_data
123: {
124: u_char reserved;
125: u_char max_length_2; /* Most significant */
126: u_char max_length_1;
127: u_char max_length_0; /* Least significant */
128: u_char min_length_1; /* Most significant */
129: u_char min_length_0; /* Least significant */
130: };
131:
132: struct scsi_mode_header_tape
133: {
134: u_char data_length; /* Sense data length */
135: u_char medium_type;
136: u_char speed:4;
137: u_char buf_mode:3;
138: u_char write_protected:1;
139: u_char blk_desc_len;
140: };
141:
142:
143: #define QIC_120 0x0f
144: #define QIC_150 0x10
145: #define QIC_320 0x11
146: #define QIC_525 0x11
147: #define QIC_1320 0x12
148:
149:
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