blob: a2eb22f67393f76650d68b484a9dd3411149424f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* interface to the SCLP-read/write driver
*
* Copyright IBM Corporation 1999, 2009
*
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef __SCLP_RW_H__
#define __SCLP_RW_H__
#include <linux/list.h>
struct mto {
u16 length;
u16 type;
u16 line_type_flags;
u8 alarm_control;
u8 _reserved[3];
} __attribute__((packed));
struct go {
u16 length;
u16 type;
u32 domid;
u8 hhmmss_time[8];
u8 th_time[3];
u8 reserved_0;
u8 dddyyyy_date[7];
u8 _reserved_1;
u16 general_msg_flags;
u8 _reserved_2[10];
u8 originating_system_name[8];
u8 job_guest_name[8];
} __attribute__((packed));
struct mdb_header {
u16 length;
u16 type;
u32 tag;
u32 revision_code;
} __attribute__((packed));
struct mdb {
struct mdb_header header;
struct go go;
struct mto mto;
} __attribute__((packed));
struct msg_buf {
struct evbuf_header header;
struct mdb mdb;
} __attribute__((packed));
/* The number of empty mto buffers that can be contained in a single sccb. */
#define NR_EMPTY_MSG_PER_SCCB ((PAGE_SIZE - sizeof(struct sclp_buffer) - \
sizeof(struct sccb_header)) / sizeof(struct msg_buf))
/*
* data structure for information about list of SCCBs (only for writing),
* will be located at the end of a SCCBs page
*/
struct sclp_buffer {
struct list_head list; /* list_head for sccb_info chain */
struct sclp_req request;
void *sccb;
struct msg_buf *current_msg;
char *current_line;
int current_length;
int retry_count;
/* output format settings */
unsigned short columns;
unsigned short htab;
/* statistics about this buffer */
unsigned int char_sum; /* # chars in sccb */
unsigned int messages; /* # messages in sccb */
/* Callback that is called after reaching final status. */
void (*callback)(struct sclp_buffer *, int);
};
int sclp_rw_init(void);
struct sclp_buffer *sclp_make_buffer(void *, unsigned short, unsigned short);
void *sclp_unmake_buffer(struct sclp_buffer *);
int sclp_buffer_space(struct sclp_buffer *);
int sclp_write(struct sclp_buffer *buffer, const unsigned char *, int);
int sclp_emit_buffer(struct sclp_buffer *,void (*)(struct sclp_buffer *,int));
void sclp_set_columns(struct sclp_buffer *, unsigned short);
void sclp_set_htab(struct sclp_buffer *, unsigned short);
int sclp_chars_in_buffer(struct sclp_buffer *);
#ifdef CONFIG_SCLP_CONSOLE
void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event);
#else
static inline void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event) { }
#endif
#endif /* __SCLP_RW_H__ */
|
