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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - drivers/s390/cio/css.h
e0fc7b49978497e4039c26db7508f745ac36da46
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>
11 #include <asm/chpid.h>
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
24 #define SNID_STATE1_RESET 0
25 #define SNID_STATE1_UNGROUPED 2
26 #define SNID_STATE1_GROUPED 3
28 #define SNID_STATE2_NOT_RESVD 0
29 #define SNID_STATE2_RESVD_ELSE 2
30 #define SNID_STATE2_RESVD_SELF 3
32 #define SNID_STATE3_MULTI_PATH 1
33 #define SNID_STATE3_SINGLE_PATH 0
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
));
42 struct extended_cssid
{
45 } __attribute__ ((packed
));
49 __u8 fc
; /* SPID function code */
50 struct path_state ps
; /* SNID path state */
51 } __attribute__ ((packed
)) inf
;
53 __u32 cpu_addr
: 16; /* CPU address */
54 struct extended_cssid ext_cssid
;
55 } __attribute__ ((packed
)) pgid_high
;
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
));
62 * A css driver handles all subchannels of one type.
67 unsigned int subchannel_type
;
68 struct device_driver drv
;
69 void (*irq
)(struct subchannel
*);
70 int (*notify
)(struct subchannel
*, int);
71 void (*verify
)(struct subchannel
*);
72 void (*termination
)(struct subchannel
*);
73 int (*probe
)(struct subchannel
*);
74 int (*remove
)(struct subchannel
*);
75 void (*shutdown
)(struct subchannel
*);
79 #define to_cssdriver(n) container_of(n, struct css_driver, drv)
82 * all css_drivers have the css_bus_type
84 extern struct bus_type css_bus_type
;
86 extern int css_driver_register(struct css_driver
*);
87 extern void css_driver_unregister(struct css_driver
*);
89 extern void css_sch_device_unregister(struct subchannel
*);
90 extern struct subchannel
* get_subchannel_by_schid(struct subchannel_id
);
91 extern int css_init_done
;
92 int for_each_subchannel_staged(int (*fn_known
)(struct subchannel
*, void *),
93 int (*fn_unknown
)(struct subchannel_id
,
95 extern int for_each_subchannel(int(*fn
)(struct subchannel_id
, void *), void *);
96 extern void css_process_crw(int, int);
97 extern void css_reiterate_subchannels(void);
98 void css_update_ssd_info(struct subchannel
*sch
);
100 #define __MAX_SUBCHANNEL 65535
103 struct channel_subsystem
{
106 struct channel_path
*chps
[__MAX_CHPID
+ 1];
107 struct device device
;
108 struct pgid global_pgid
;
110 /* channel measurement related */
114 /* for orphaned ccw devices */
115 struct subchannel
*pseudo_subchannel
;
117 #define to_css(dev) container_of(dev, struct channel_subsystem, device)
119 extern struct bus_type css_bus_type
;
120 extern struct channel_subsystem
*channel_subsystems
[];
122 /* Some helper functions for disconnected state. */
123 int device_is_disconnected(struct subchannel
*);
124 void device_set_disconnected(struct subchannel
*);
125 void device_trigger_reprobe(struct subchannel
*);
127 /* Helper functions for vary on/off. */
128 int device_is_online(struct subchannel
*);
129 void device_kill_io(struct subchannel
*);
130 void device_set_intretry(struct subchannel
*sch
);
131 int device_trigger_verify(struct subchannel
*sch
);
133 /* Machine check helper function. */
134 void device_kill_pending_timer(struct subchannel
*);
136 /* Helper functions to build lists for the slow path. */
137 void css_schedule_eval(struct subchannel_id schid
);
138 void css_schedule_eval_all(void);
140 int sch_is_pseudo_sch(struct subchannel
*);
142 int css_sch_is_valid(struct schib
*);
144 extern struct workqueue_struct
*slow_path_wq
;
145 void css_wait_for_slow_path(void);