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1#ifndef _CSS_H
2#define _CSS_H
3
4#include <linux/mutex.h>
5#include <linux/wait.h>
6#include <linux/workqueue.h>
7#include <linux/device.h>
8#include <linux/types.h>
9
10#include <asm/cio.h>
11#include <asm/chpid.h>
12#include <asm/schid.h>
13
14#include "cio.h"
15
16/*
17 * path grouping stuff
18 */
19#define SPID_FUNC_SINGLE_PATH 0x00
20#define SPID_FUNC_MULTI_PATH 0x80
21#define SPID_FUNC_ESTABLISH 0x00
22#define SPID_FUNC_RESIGN 0x40
23#define SPID_FUNC_DISBAND 0x20
24
25#define SNID_STATE1_RESET 0
26#define SNID_STATE1_UNGROUPED 2
27#define SNID_STATE1_GROUPED 3
28
29#define SNID_STATE2_NOT_RESVD 0
30#define SNID_STATE2_RESVD_ELSE 2
31#define SNID_STATE2_RESVD_SELF 3
32
33#define SNID_STATE3_MULTI_PATH 1
34#define SNID_STATE3_SINGLE_PATH 0
35
36struct path_state {
37 __u8 state1 : 2; /* path state value 1 */
38 __u8 state2 : 2; /* path state value 2 */
39 __u8 state3 : 1; /* path state value 3 */
40 __u8 resvd : 3; /* reserved */
41} __attribute__ ((packed));
42
43struct extended_cssid {
44 u8 version;
45 u8 cssid;
46} __attribute__ ((packed));
47
48struct pgid {
49 union {
50 __u8 fc; /* SPID function code */
51 struct path_state ps; /* SNID path state */
52 } __attribute__ ((packed)) inf;
53 union {
54 __u32 cpu_addr : 16; /* CPU address */
55 struct extended_cssid ext_cssid;
56 } __attribute__ ((packed)) pgid_high;
57 __u32 cpu_id : 24; /* CPU identification */
58 __u32 cpu_model : 16; /* CPU model */
59 __u32 tod_high; /* high word TOD clock */
60} __attribute__ ((packed));
61
62struct subchannel;
63struct chp_link;
64/**
65 * struct css_driver - device driver for subchannels
66 * @subchannel_type: subchannel type supported by this driver
67 * @drv: embedded device driver structure
68 * @irq: called on interrupts
69 * @chp_event: called for events affecting a channel path
70 * @sch_event: called for events affecting the subchannel
71 * @probe: function called on probe
72 * @remove: function called on remove
73 * @shutdown: called at device shutdown
74 * @prepare: prepare for pm state transition
75 * @complete: undo work done in @prepare
76 * @freeze: callback for freezing during hibernation snapshotting
77 * @thaw: undo work done in @freeze
78 * @restore: callback for restoring after hibernation
79 * @settle: wait for asynchronous work to finish
80 */
81struct css_driver {
82 struct css_device_id *subchannel_type;
83 struct device_driver drv;
84 void (*irq)(struct subchannel *);
85 int (*chp_event)(struct subchannel *, struct chp_link *, int);
86 int (*sch_event)(struct subchannel *, int);
87 int (*probe)(struct subchannel *);
88 int (*remove)(struct subchannel *);
89 void (*shutdown)(struct subchannel *);
90 int (*prepare) (struct subchannel *);
91 void (*complete) (struct subchannel *);
92 int (*freeze)(struct subchannel *);
93 int (*thaw) (struct subchannel *);
94 int (*restore)(struct subchannel *);
95 int (*settle)(void);
96};
97
98#define to_cssdriver(n) container_of(n, struct css_driver, drv)
99
100extern int css_driver_register(struct css_driver *);
101extern void css_driver_unregister(struct css_driver *);
102
103extern void css_sch_device_unregister(struct subchannel *);
104extern int css_probe_device(struct subchannel_id);
105extern struct subchannel *get_subchannel_by_schid(struct subchannel_id);
106extern int css_init_done;
107extern int max_ssid;
108int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *),
109 int (*fn_unknown)(struct subchannel_id,
110 void *), void *data);
111extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
112extern void css_reiterate_subchannels(void);
113void css_update_ssd_info(struct subchannel *sch);
114
115#define __MAX_SUBCHANNEL 65535
116#define __MAX_SSID 3
117
118struct channel_subsystem {
119 u8 cssid;
120 int valid;
121 struct channel_path *chps[__MAX_CHPID + 1];
122 struct device device;
123 struct pgid global_pgid;
124 struct mutex mutex;
125 /* channel measurement related */
126 int cm_enabled;
127 void *cub_addr1;
128 void *cub_addr2;
129 /* for orphaned ccw devices */
130 struct subchannel *pseudo_subchannel;
131};
132#define to_css(dev) container_of(dev, struct channel_subsystem, device)
133
134extern struct channel_subsystem *channel_subsystems[];
135
136/* Helper functions to build lists for the slow path. */
137void css_schedule_eval(struct subchannel_id schid);
138void css_schedule_eval_all(void);
139int css_complete_work(void);
140
141int sch_is_pseudo_sch(struct subchannel *);
142struct schib;
143int css_sch_is_valid(struct schib *);
144
145extern struct workqueue_struct *cio_work_q;
146void css_wait_for_slow_path(void);
147void css_sched_sch_todo(struct subchannel *sch, enum sch_todo todo);
148#endif
1#ifndef _CSS_H
2#define _CSS_H
3
4#include <linux/mutex.h>
5#include <linux/wait.h>
6#include <linux/workqueue.h>
7#include <linux/device.h>
8#include <linux/types.h>
9
10#include <asm/cio.h>
11#include <asm/chpid.h>
12#include <asm/schid.h>
13
14#include "cio.h"
15
16/*
17 * path grouping stuff
18 */
19#define SPID_FUNC_SINGLE_PATH 0x00
20#define SPID_FUNC_MULTI_PATH 0x80
21#define SPID_FUNC_ESTABLISH 0x00
22#define SPID_FUNC_RESIGN 0x40
23#define SPID_FUNC_DISBAND 0x20
24
25#define SNID_STATE1_RESET 0
26#define SNID_STATE1_UNGROUPED 2
27#define SNID_STATE1_GROUPED 3
28
29#define SNID_STATE2_NOT_RESVD 0
30#define SNID_STATE2_RESVD_ELSE 2
31#define SNID_STATE2_RESVD_SELF 3
32
33#define SNID_STATE3_MULTI_PATH 1
34#define SNID_STATE3_SINGLE_PATH 0
35
36struct path_state {
37 __u8 state1 : 2; /* path state value 1 */
38 __u8 state2 : 2; /* path state value 2 */
39 __u8 state3 : 1; /* path state value 3 */
40 __u8 resvd : 3; /* reserved */
41} __attribute__ ((packed));
42
43struct extended_cssid {
44 u8 version;
45 u8 cssid;
46} __attribute__ ((packed));
47
48struct pgid {
49 union {
50 __u8 fc; /* SPID function code */
51 struct path_state ps; /* SNID path state */
52 } __attribute__ ((packed)) inf;
53 union {
54 __u32 cpu_addr : 16; /* CPU address */
55 struct extended_cssid ext_cssid;
56 } __attribute__ ((packed)) pgid_high;
57 __u32 cpu_id : 24; /* CPU identification */
58 __u32 cpu_model : 16; /* CPU model */
59 __u32 tod_high; /* high word TOD clock */
60} __attribute__ ((packed));
61
62struct subchannel;
63struct chp_link;
64/**
65 * struct css_driver - device driver for subchannels
66 * @subchannel_type: subchannel type supported by this driver
67 * @drv: embedded device driver structure
68 * @irq: called on interrupts
69 * @chp_event: called for events affecting a channel path
70 * @sch_event: called for events affecting the subchannel
71 * @probe: function called on probe
72 * @remove: function called on remove
73 * @shutdown: called at device shutdown
74 * @prepare: prepare for pm state transition
75 * @complete: undo work done in @prepare
76 * @freeze: callback for freezing during hibernation snapshotting
77 * @thaw: undo work done in @freeze
78 * @restore: callback for restoring after hibernation
79 * @settle: wait for asynchronous work to finish
80 */
81struct css_driver {
82 struct css_device_id *subchannel_type;
83 struct device_driver drv;
84 void (*irq)(struct subchannel *);
85 int (*chp_event)(struct subchannel *, struct chp_link *, int);
86 int (*sch_event)(struct subchannel *, int);
87 int (*probe)(struct subchannel *);
88 int (*remove)(struct subchannel *);
89 void (*shutdown)(struct subchannel *);
90 int (*prepare) (struct subchannel *);
91 void (*complete) (struct subchannel *);
92 int (*freeze)(struct subchannel *);
93 int (*thaw) (struct subchannel *);
94 int (*restore)(struct subchannel *);
95 int (*settle)(void);
96};
97
98#define to_cssdriver(n) container_of(n, struct css_driver, drv)
99
100extern int css_driver_register(struct css_driver *);
101extern void css_driver_unregister(struct css_driver *);
102
103extern void css_sch_device_unregister(struct subchannel *);
104extern int css_register_subchannel(struct subchannel *);
105extern struct subchannel *css_alloc_subchannel(struct subchannel_id);
106extern struct subchannel *get_subchannel_by_schid(struct subchannel_id);
107extern int css_init_done;
108extern int max_ssid;
109int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *),
110 int (*fn_unknown)(struct subchannel_id,
111 void *), void *data);
112extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
113void css_update_ssd_info(struct subchannel *sch);
114
115struct channel_subsystem {
116 u8 cssid;
117 int valid;
118 struct channel_path *chps[__MAX_CHPID + 1];
119 struct device device;
120 struct pgid global_pgid;
121 struct mutex mutex;
122 /* channel measurement related */
123 int cm_enabled;
124 void *cub_addr1;
125 void *cub_addr2;
126 /* for orphaned ccw devices */
127 struct subchannel *pseudo_subchannel;
128};
129#define to_css(dev) container_of(dev, struct channel_subsystem, device)
130
131extern struct channel_subsystem *channel_subsystems[];
132
133/* Helper functions to build lists for the slow path. */
134void css_schedule_eval(struct subchannel_id schid);
135void css_schedule_eval_all(void);
136void css_schedule_eval_all_unreg(unsigned long delay);
137int css_complete_work(void);
138
139int sch_is_pseudo_sch(struct subchannel *);
140struct schib;
141int css_sch_is_valid(struct schib *);
142
143extern struct workqueue_struct *cio_work_q;
144void css_wait_for_slow_path(void);
145void css_sched_sch_todo(struct subchannel *sch, enum sch_todo todo);
146#endif