xref: /linux/drivers/s390/char/tape_std.h (revision cbecf716ca618fd44feda6bd9a64a8179d031fc5)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *    standard tape device functions for ibm tapes.
4  *
5  *    Copyright 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 
105 /* Some non-mtop commands. */
106 int tape_std_assign(struct tape_device *);
107 int tape_std_unassign(struct tape_device *);
108 int tape_std_read_block_id(struct tape_device *device, __u64 *id);
109 int tape_std_display(struct tape_device *, struct display_struct *disp);
110 int tape_std_terminate_write(struct tape_device *);
111 
112 /* Standard magnetic tape commands. */
113 int tape_std_mtbsf(struct tape_device *, int);
114 int tape_std_mtbsfm(struct tape_device *, int);
115 int tape_std_mtbsr(struct tape_device *, int);
116 int tape_std_mtcompression(struct tape_device *, int);
117 int tape_std_mteom(struct tape_device *, int);
118 int tape_std_mterase(struct tape_device *, int);
119 int tape_std_mtfsf(struct tape_device *, int);
120 int tape_std_mtfsfm(struct tape_device *, int);
121 int tape_std_mtfsr(struct tape_device *, int);
122 int tape_std_mtload(struct tape_device *, int);
123 int tape_std_mtnop(struct tape_device *, int);
124 int tape_std_mtoffl(struct tape_device *, int);
125 int tape_std_mtreset(struct tape_device *, int);
126 int tape_std_mtreten(struct tape_device *, int);
127 int tape_std_mtrew(struct tape_device *, int);
128 int tape_std_mtsetblk(struct tape_device *, int);
129 int tape_std_mtunload(struct tape_device *, int);
130 int tape_std_mtweof(struct tape_device *, int);
131 
132 /* Event handlers */
133 void tape_std_process_eov(struct tape_device *);
134 
135 /* S390 tape types */
136 enum s390_tape_type {
137         tape_3480,
138         tape_3490,
139         tape_3590,
140         tape_3592,
141 };
142 
143 #endif // _TAPE_STD_H
144