Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _CSS_H |
2 | #define _CSS_H | |
3 | ||
495a5b45 | 4 | #include <linux/mutex.h> |
1da177e4 LT |
5 | #include <linux/wait.h> |
6 | #include <linux/workqueue.h> | |
e6b6e10a | 7 | #include <linux/device.h> |
e5854a58 | 8 | #include <linux/types.h> |
1da177e4 LT |
9 | |
10 | #include <asm/cio.h> | |
e5854a58 | 11 | #include <asm/chpid.h> |
1da177e4 | 12 | |
a8237fc4 CH |
13 | #include "schid.h" |
14 | ||
1da177e4 LT |
15 | /* |
16 | * path grouping stuff | |
17 | */ | |
18 | #define SPID_FUNC_SINGLE_PATH 0x00 | |
19 | #define SPID_FUNC_MULTI_PATH 0x80 | |
20 | #define SPID_FUNC_ESTABLISH 0x00 | |
21 | #define SPID_FUNC_RESIGN 0x40 | |
22 | #define SPID_FUNC_DISBAND 0x20 | |
23 | ||
24 | #define SNID_STATE1_RESET 0 | |
25 | #define SNID_STATE1_UNGROUPED 2 | |
26 | #define SNID_STATE1_GROUPED 3 | |
27 | ||
28 | #define SNID_STATE2_NOT_RESVD 0 | |
29 | #define SNID_STATE2_RESVD_ELSE 2 | |
30 | #define SNID_STATE2_RESVD_SELF 3 | |
31 | ||
32 | #define SNID_STATE3_MULTI_PATH 1 | |
33 | #define SNID_STATE3_SINGLE_PATH 0 | |
34 | ||
35 | struct path_state { | |
36 | __u8 state1 : 2; /* path state value 1 */ | |
37 | __u8 state2 : 2; /* path state value 2 */ | |
38 | __u8 state3 : 1; /* path state value 3 */ | |
39 | __u8 resvd : 3; /* reserved */ | |
40 | } __attribute__ ((packed)); | |
41 | ||
a28c6944 CH |
42 | struct extended_cssid { |
43 | u8 version; | |
44 | u8 cssid; | |
45 | } __attribute__ ((packed)); | |
46 | ||
1da177e4 LT |
47 | struct pgid { |
48 | union { | |
49 | __u8 fc; /* SPID function code */ | |
50 | struct path_state ps; /* SNID path state */ | |
4ae9538d | 51 | } __attribute__ ((packed)) inf; |
a28c6944 CH |
52 | union { |
53 | __u32 cpu_addr : 16; /* CPU address */ | |
54 | struct extended_cssid ext_cssid; | |
4ae9538d | 55 | } __attribute__ ((packed)) pgid_high; |
1da177e4 LT |
56 | __u32 cpu_id : 24; /* CPU identification */ |
57 | __u32 cpu_model : 16; /* CPU model */ | |
58 | __u32 tod_high; /* high word TOD clock */ | |
59 | } __attribute__ ((packed)); | |
60 | ||
1da177e4 LT |
61 | /* |
62 | * A css driver handles all subchannels of one type. | |
63 | * Currently, we only care about I/O subchannels (type 0), these | |
64 | * have a ccw_device connected to them. | |
65 | */ | |
8bbace7e | 66 | struct subchannel; |
1da177e4 | 67 | struct css_driver { |
4beee646 | 68 | struct module *owner; |
1da177e4 LT |
69 | unsigned int subchannel_type; |
70 | struct device_driver drv; | |
602b20f2 CH |
71 | void (*irq)(struct subchannel *); |
72 | int (*notify)(struct subchannel *, int); | |
73 | void (*verify)(struct subchannel *); | |
74 | void (*termination)(struct subchannel *); | |
8bbace7e CH |
75 | int (*probe)(struct subchannel *); |
76 | int (*remove)(struct subchannel *); | |
77 | void (*shutdown)(struct subchannel *); | |
25b7bb58 | 78 | const char *name; |
1da177e4 LT |
79 | }; |
80 | ||
084325d8 CH |
81 | #define to_cssdriver(n) container_of(n, struct css_driver, drv) |
82 | ||
1da177e4 LT |
83 | /* |
84 | * all css_drivers have the css_bus_type | |
85 | */ | |
86 | extern struct bus_type css_bus_type; | |
1da177e4 | 87 | |
25b7bb58 CH |
88 | extern int css_driver_register(struct css_driver *); |
89 | extern void css_driver_unregister(struct css_driver *); | |
90 | ||
6ab4879a | 91 | extern void css_sch_device_unregister(struct subchannel *); |
a8237fc4 | 92 | extern struct subchannel * get_subchannel_by_schid(struct subchannel_id); |
1da177e4 | 93 | extern int css_init_done; |
e82a1567 PO |
94 | int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *), |
95 | int (*fn_unknown)(struct subchannel_id, | |
96 | void *), void *data); | |
f97a56fb | 97 | extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *); |
83b3370c | 98 | extern void css_process_crw(int, int); |
2b67fc46 | 99 | extern void css_reiterate_subchannels(void); |
7ad6a249 | 100 | void css_update_ssd_info(struct subchannel *sch); |
1da177e4 | 101 | |
a8237fc4 | 102 | #define __MAX_SUBCHANNEL 65535 |
fb6958a5 | 103 | #define __MAX_SSID 3 |
a28c6944 CH |
104 | |
105 | struct channel_subsystem { | |
106 | u8 cssid; | |
107 | int valid; | |
871931c1 | 108 | struct channel_path *chps[__MAX_CHPID + 1]; |
a28c6944 CH |
109 | struct device device; |
110 | struct pgid global_pgid; | |
495a5b45 CH |
111 | struct mutex mutex; |
112 | /* channel measurement related */ | |
113 | int cm_enabled; | |
114 | void *cub_addr1; | |
115 | void *cub_addr2; | |
d7b5a4c9 CH |
116 | /* for orphaned ccw devices */ |
117 | struct subchannel *pseudo_subchannel; | |
a28c6944 CH |
118 | }; |
119 | #define to_css(dev) container_of(dev, struct channel_subsystem, device) | |
1da177e4 LT |
120 | |
121 | extern struct bus_type css_bus_type; | |
7c9f4e3a | 122 | extern struct channel_subsystem *channel_subsystems[]; |
1da177e4 LT |
123 | |
124 | /* Some helper functions for disconnected state. */ | |
125 | int device_is_disconnected(struct subchannel *); | |
126 | void device_set_disconnected(struct subchannel *); | |
127 | void device_trigger_reprobe(struct subchannel *); | |
128 | ||
129 | /* Helper functions for vary on/off. */ | |
130 | int device_is_online(struct subchannel *); | |
e7769b48 | 131 | void device_kill_io(struct subchannel *); |
d23861ff | 132 | void device_set_intretry(struct subchannel *sch); |
24cb5b48 | 133 | int device_trigger_verify(struct subchannel *sch); |
1da177e4 LT |
134 | |
135 | /* Machine check helper function. */ | |
136 | void device_kill_pending_timer(struct subchannel *); | |
137 | ||
138 | /* Helper functions to build lists for the slow path. */ | |
83b3370c PO |
139 | void css_schedule_eval(struct subchannel_id schid); |
140 | void css_schedule_eval_all(void); | |
1da177e4 | 141 | |
d7b5a4c9 | 142 | int sch_is_pseudo_sch(struct subchannel *); |
b279a4f5 CH |
143 | struct schib; |
144 | int css_sch_is_valid(struct schib *); | |
d7b5a4c9 | 145 | |
1da177e4 | 146 | extern struct workqueue_struct *slow_path_wq; |
7674da77 | 147 | |
529192f3 | 148 | extern struct attribute_group *subch_attr_groups[]; |
1da177e4 | 149 | #endif |