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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
#ifndef _CSS_H
#define _CSS_H
#include <linux/mutex.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/device.h>
#include <linux/types.h>
#include <asm/cio.h>
#include <asm/chpid.h>
#include "schid.h"
/*
* path grouping stuff
*/
#define SPID_FUNC_SINGLE_PATH 0x00
#define SPID_FUNC_MULTI_PATH 0x80
#define SPID_FUNC_ESTABLISH 0x00
#define SPID_FUNC_RESIGN 0x40
#define SPID_FUNC_DISBAND 0x20
#define SNID_STATE1_RESET 0
#define SNID_STATE1_UNGROUPED 2
#define SNID_STATE1_GROUPED 3
#define SNID_STATE2_NOT_RESVD 0
#define SNID_STATE2_RESVD_ELSE 2
#define SNID_STATE2_RESVD_SELF 3
#define SNID_STATE3_MULTI_PATH 1
#define SNID_STATE3_SINGLE_PATH 0
struct path_state {
__u8 state1 : 2; /* path state value 1 */
__u8 state2 : 2; /* path state value 2 */
__u8 state3 : 1; /* path state value 3 */
__u8 resvd : 3; /* reserved */
} __attribute__ ((packed));
struct extended_cssid {
u8 version;
u8 cssid;
} __attribute__ ((packed));
struct pgid {
union {
__u8 fc; /* SPID function code */
struct path_state ps; /* SNID path state */
} __attribute__ ((packed)) inf;
union {
__u32 cpu_addr : 16; /* CPU address */
struct extended_cssid ext_cssid;
} __attribute__ ((packed)) pgid_high;
__u32 cpu_id : 24; /* CPU identification */
__u32 cpu_model : 16; /* CPU model */
__u32 tod_high; /* high word TOD clock */
} __attribute__ ((packed));
/*
* A css driver handles all subchannels of one type.
*/
struct subchannel;
struct css_driver {
struct module *owner;
unsigned int subchannel_type;
struct device_driver drv;
void (*irq)(struct subchannel *);
int (*notify)(struct subchannel *, int);
void (*verify)(struct subchannel *);
void (*termination)(struct subchannel *);
int (*probe)(struct subchannel *);
int (*remove)(struct subchannel *);
void (*shutdown)(struct subchannel *);
const char *name;
};
#define to_cssdriver(n) container_of(n, struct css_driver, drv)
/*
* all css_drivers have the css_bus_type
*/
extern struct bus_type css_bus_type;
extern int css_driver_register(struct css_driver *);
extern void css_driver_unregister(struct css_driver *);
extern void css_sch_device_unregister(struct subchannel *);
extern struct subchannel * get_subchannel_by_schid(struct subchannel_id);
extern int css_init_done;
int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *),
int (*fn_unknown)(struct subchannel_id,
void *), void *data);
extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
extern void css_process_crw(int, int);
extern void css_reiterate_subchannels(void);
void css_update_ssd_info(struct subchannel *sch);
#define __MAX_SUBCHANNEL 65535
#define __MAX_SSID 3
struct channel_subsystem {
u8 cssid;
int valid;
struct channel_path *chps[__MAX_CHPID + 1];
struct device device;
struct pgid global_pgid;
struct mutex mutex;
/* channel measurement related */
int cm_enabled;
void *cub_addr1;
void *cub_addr2;
/* for orphaned ccw devices */
struct subchannel *pseudo_subchannel;
};
#define to_css(dev) container_of(dev, struct channel_subsystem, device)
extern struct bus_type css_bus_type;
extern struct channel_subsystem *channel_subsystems[];
/* Some helper functions for disconnected state. */
int device_is_disconnected(struct subchannel *);
void device_set_disconnected(struct subchannel *);
void device_trigger_reprobe(struct subchannel *);
/* Helper functions for vary on/off. */
int device_is_online(struct subchannel *);
void device_kill_io(struct subchannel *);
void device_set_intretry(struct subchannel *sch);
int device_trigger_verify(struct subchannel *sch);
/* Machine check helper function. */
void device_kill_pending_timer(struct subchannel *);
/* Helper functions to build lists for the slow path. */
void css_schedule_eval(struct subchannel_id schid);
void css_schedule_eval_all(void);
int sch_is_pseudo_sch(struct subchannel *);
struct schib;
int css_sch_is_valid(struct schib *);
extern struct workqueue_struct *slow_path_wq;
void css_wait_for_slow_path(void);
#endif
|
