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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
#ifndef S390_CIO_H
#define S390_CIO_H
#include <linux/mutex.h>
#include <linux/device.h>
#include <asm/chpid.h>
#include "chsc.h"
#include "schid.h"
/*
* path management control word
*/
struct pmcw {
u32 intparm; /* interruption parameter */
u32 qf : 1; /* qdio facility */
u32 res0 : 1; /* reserved zeros */
u32 isc : 3; /* interruption sublass */
u32 res5 : 3; /* reserved zeros */
u32 ena : 1; /* enabled */
u32 lm : 2; /* limit mode */
u32 mme : 2; /* measurement-mode enable */
u32 mp : 1; /* multipath mode */
u32 tf : 1; /* timing facility */
u32 dnv : 1; /* device number valid */
u32 dev : 16; /* device number */
u8 lpm; /* logical path mask */
u8 pnom; /* path not operational mask */
u8 lpum; /* last path used mask */
u8 pim; /* path installed mask */
u16 mbi; /* measurement-block index */
u8 pom; /* path operational mask */
u8 pam; /* path available mask */
u8 chpid[8]; /* CHPID 0-7 (if available) */
u32 unused1 : 8; /* reserved zeros */
u32 st : 3; /* subchannel type */
u32 unused2 : 18; /* reserved zeros */
u32 mbfc : 1; /* measurement block format control */
u32 xmwme : 1; /* extended measurement word mode enable */
u32 csense : 1; /* concurrent sense; can be enabled ...*/
/* ... per MSCH, however, if facility */
/* ... is not installed, this results */
/* ... in an operand exception. */
} __attribute__ ((packed));
/*
* subchannel information block
*/
struct schib {
struct pmcw pmcw; /* path management control word */
struct scsw scsw; /* subchannel status word */
__u64 mba; /* measurement block address */
__u8 mda[4]; /* model dependent area */
} __attribute__ ((packed,aligned(4)));
/* subchannel data structure used by I/O subroutines */
struct subchannel {
struct subchannel_id schid;
spinlock_t *lock; /* subchannel lock */
struct mutex reg_mutex;
enum {
SUBCHANNEL_TYPE_IO = 0,
SUBCHANNEL_TYPE_CHSC = 1,
SUBCHANNEL_TYPE_MSG = 2,
SUBCHANNEL_TYPE_ADM = 3,
} st; /* subchannel type */
struct {
unsigned int suspend:1; /* allow suspend */
unsigned int prefetch:1;/* deny prefetch */
unsigned int inter:1; /* suppress intermediate interrupts */
} __attribute__ ((packed)) options;
__u8 vpm; /* verified path mask */
__u8 lpm; /* logical path mask */
__u8 opm; /* operational path mask */
struct schib schib; /* subchannel information block */
struct chsc_ssd_info ssd_info; /* subchannel description */
struct device dev; /* entry in device tree */
struct css_driver *driver;
void *private; /* private per subchannel type data */
} __attribute__ ((aligned(8)));
#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
#define to_subchannel(n) container_of(n, struct subchannel, dev)
extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
extern int cio_enable_subchannel(struct subchannel *, unsigned int, u32);
extern int cio_disable_subchannel (struct subchannel *);
extern int cio_cancel (struct subchannel *);
extern int cio_clear (struct subchannel *);
extern int cio_resume (struct subchannel *);
extern int cio_halt (struct subchannel *);
extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
extern int cio_cancel (struct subchannel *);
extern int cio_set_options (struct subchannel *, int);
extern int cio_get_options (struct subchannel *);
extern int cio_modify (struct subchannel *);
int cio_create_sch_lock(struct subchannel *);
void do_adapter_IO(void);
void do_IRQ(struct pt_regs *);
/* Use with care. */
#ifdef CONFIG_CCW_CONSOLE
extern struct subchannel *cio_probe_console(void);
extern void cio_release_console(void);
extern int cio_is_console(struct subchannel_id);
extern struct subchannel *cio_get_console_subchannel(void);
extern spinlock_t * cio_get_console_lock(void);
extern void *cio_get_console_priv(void);
#else
#define cio_is_console(schid) 0
#define cio_get_console_subchannel() NULL
#define cio_get_console_lock() NULL
#define cio_get_console_priv() NULL
#endif
extern int cio_show_msg;
#endif
|
