1 /*
2 * drivers/s390/char/tape_std.h
3 * standard tape device functions for ibm tapes.
4 *
5 * Copyright (C) IBM Corp. 2001,2006
6 * Author(s): Carsten Otte <cotte@de.ibm.com>
7 * Tuan Ngo-Anh <ngoanh@de.ibm.com>
8 * Martin Schwidefsky <schwidefsky@de.ibm.com>
9 */
10
11 #ifndef _TAPE_STD_H
12 #define _TAPE_STD_H
13
14 #include <asm/tape390.h>
15
16 /*
17 * Biggest block size to handle. Currently 64K because we only build
18 * channel programs without data chaining.
19 */
20 #define MAX_BLOCKSIZE 65535
21
22 /*
23 * The CCW commands for the Tape type of command.
24 */
25 #define INVALID_00 0x00 /* Invalid cmd */
26 #define BACKSPACEBLOCK 0x27 /* Back Space block */
27 #define BACKSPACEFILE 0x2f /* Back Space file */
28 #define DATA_SEC_ERASE 0x97 /* Data security erase */
29 #define ERASE_GAP 0x17 /* Erase Gap */
30 #define FORSPACEBLOCK 0x37 /* Forward space block */
31 #define FORSPACEFILE 0x3F /* Forward Space file */
32 #define FORCE_STREAM_CNT 0xEB /* Forced streaming count # */
33 #define NOP 0x03 /* No operation */
34 #define READ_FORWARD 0x02 /* Read forward */
35 #define REWIND 0x07 /* Rewind */
36 #define REWIND_UNLOAD 0x0F /* Rewind and Unload */
37 #define SENSE 0x04 /* Sense */
38 #define NEW_MODE_SET 0xEB /* Guess it is Mode set */
39 #define WRITE_CMD 0x01 /* Write */
40 #define WRITETAPEMARK 0x1F /* Write Tape Mark */
41
42 #define ASSIGN 0xB7 /* 3420 REJECT,3480 OK */
43 #define CONTROL_ACCESS 0xE3 /* Set high speed */
44 #define DIAG_MODE_SET 0x0B /* 3420 NOP, 3480 REJECT */
45 #define LOAD_DISPLAY 0x9F /* 3420 REJECT,3480 OK */
46 #define LOCATE 0x4F /* 3420 REJ, 3480 NOP */
47 #define LOOP_WRITE_TO_READ 0x8B /* 3480 REJECT */
48 #define MODE_SET_DB 0xDB /* 3420 REJECT,3480 OK */
49 #define MODE_SET_C3 0xC3 /* for 3420 */
50 #define MODE_SET_CB 0xCB /* for 3420 */
51 #define MODE_SET_D3 0xD3 /* for 3420 */
52 #define READ_BACKWARD 0x0C /* */
53 #define READ_BLOCK_ID 0x22 /* 3420 REJECT,3480 OK */
54 #define READ_BUFFER 0x12 /* 3420 REJECT,3480 OK */
55 #define READ_BUFF_LOG 0x24 /* 3420 REJECT,3480 OK */
56 #define RELEASE 0xD4 /* 3420 NOP, 3480 REJECT */
57 #define REQ_TRK_IN_ERROR 0x1B /* 3420 NOP, 3480 REJECT */
58 #define RESERVE 0xF4 /* 3420 NOP, 3480 REJECT */
59 #define SENSE_GROUP_ID 0x34 /* 3420 REJECT,3480 OK */
60 #define SENSE_ID 0xE4 /* 3420 REJECT,3480 OK */
61 #define READ_DEV_CHAR 0x64 /* Read device characteristics */
62 #define SET_DIAGNOSE 0x4B /* 3420 NOP, 3480 REJECT */
63 #define SET_GROUP_ID 0xAF /* 3420 REJECT,3480 OK */
64 #define SET_TAPE_WRITE_IMMED 0xC3 /* for 3480 */
65 #define SUSPEND 0x5B /* 3420 REJ, 3480 NOP */
66 #define SYNC 0x43 /* Synchronize (flush buffer) */
67 #define UNASSIGN 0xC7 /* 3420 REJECT,3480 OK */
68 #define PERF_SUBSYS_FUNC 0x77 /* 3490 CMD */
69 #define READ_CONFIG_DATA 0xFA /* 3490 CMD */
70 #define READ_MESSAGE_ID 0x4E /* 3490 CMD */
71 #define READ_SUBSYS_DATA 0x3E /* 3490 CMD */
72 #define SET_INTERFACE_ID 0x73 /* 3490 CMD */
73
74 #define SENSE_COMMAND_REJECT 0x80
75 #define SENSE_INTERVENTION_REQUIRED 0x40
76 #define SENSE_BUS_OUT_CHECK 0x20
77 #define SENSE_EQUIPMENT_CHECK 0x10
78 #define SENSE_DATA_CHECK 0x08
79 #define SENSE_OVERRUN 0x04
80 #define SENSE_DEFERRED_UNIT_CHECK 0x02
81 #define SENSE_ASSIGNED_ELSEWHERE 0x01
82
83 #define SENSE_LOCATE_FAILURE 0x80
84 #define SENSE_DRIVE_ONLINE 0x40
85 #define SENSE_RESERVED 0x20
86 #define SENSE_RECORD_SEQUENCE_ERR 0x10
87 #define SENSE_BEGINNING_OF_TAPE 0x08
88 #define SENSE_WRITE_MODE 0x04
89 #define SENSE_WRITE_PROTECT 0x02
90 #define SENSE_NOT_CAPABLE 0x01
91
92 #define SENSE_CHANNEL_ADAPTER_CODE 0xE0
93 #define SENSE_CHANNEL_ADAPTER_LOC 0x10
94 #define SENSE_REPORTING_CU 0x08
95 #define SENSE_AUTOMATIC_LOADER 0x04
96 #define SENSE_TAPE_SYNC_MODE 0x02
97 #define SENSE_TAPE_POSITIONING 0x01
98
99 /* discipline functions */
100 struct tape_request *tape_std_read_block(struct tape_device *, size_t);
101 void tape_std_read_backward(struct tape_device *device,
102 struct tape_request *request);
103 struct tape_request *tape_std_write_block(struct tape_device *, size_t);
104 struct tape_request *tape_std_bread(struct tape_device *, struct request *);
105 void tape_std_free_bread(struct tape_request *);
106 void tape_std_check_locate(struct tape_device *, struct tape_request *);
107 struct tape_request *tape_std_bwrite(struct request *,
108 struct tape_device *, int);
109
110 /* Some non-mtop commands. */
111 int tape_std_assign(struct tape_device *);
112 int tape_std_unassign(struct tape_device *);
113 int tape_std_read_block_id(struct tape_device *device, __u64 *id);
114 int tape_std_display(struct tape_device *, struct display_struct *disp);
115 int tape_std_terminate_write(struct tape_device *);
116
117 /* Standard magnetic tape commands. */
118 int tape_std_mtbsf(struct tape_device *, int);
119 int tape_std_mtbsfm(struct tape_device *, int);
120 int tape_std_mtbsr(struct tape_device *, int);
121 int tape_std_mtcompression(struct tape_device *, int);
122 int tape_std_mteom(struct tape_device *, int);
123 int tape_std_mterase(struct tape_device *, int);
124 int tape_std_mtfsf(struct tape_device *, int);
125 int tape_std_mtfsfm(struct tape_device *, int);
126 int tape_std_mtfsr(struct tape_device *, int);
127 int tape_std_mtload(struct tape_device *, int);
128 int tape_std_mtnop(struct tape_device *, int);
129 int tape_std_mtoffl(struct tape_device *, int);
130 int tape_std_mtreset(struct tape_device *, int);
131 int tape_std_mtreten(struct tape_device *, int);
132 int tape_std_mtrew(struct tape_device *, int);
133 int tape_std_mtsetblk(struct tape_device *, int);
134 int tape_std_mtunload(struct tape_device *, int);
135 int tape_std_mtweof(struct tape_device *, int);
136
137 /* Event handlers */
138 void tape_std_default_handler(struct tape_device *);
139 void tape_std_unexpect_uchk_handler(struct tape_device *);
140 void tape_std_irq(struct tape_device *);
141 void tape_std_process_eov(struct tape_device *);
142
143 // the error recovery stuff:
144 void tape_std_error_recovery(struct tape_device *);
145 void tape_std_error_recovery_has_failed(struct tape_device *,int error_id);
146 void tape_std_error_recovery_succeded(struct tape_device *);
147 void tape_std_error_recovery_do_retry(struct tape_device *);
148 void tape_std_error_recovery_read_opposite(struct tape_device *);
149 void tape_std_error_recovery_HWBUG(struct tape_device *, int condno);
150
151 /* S390 tape types */
152 enum s390_tape_type {
153 tape_3480,
154 tape_3490,
155 tape_3590,
156 tape_3592,
157 };
158
159 #endif // _TAPE_STD_H
160
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