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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/s390/cio/css.h
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>
12 #include <asm/schid.h>
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
25 #define SNID_STATE1_RESET 0
26 #define SNID_STATE1_UNGROUPED 2
27 #define SNID_STATE1_GROUPED 3
29 #define SNID_STATE2_NOT_RESVD 0
30 #define SNID_STATE2_RESVD_ELSE 2
31 #define SNID_STATE2_RESVD_SELF 3
33 #define SNID_STATE3_MULTI_PATH 1
34 #define SNID_STATE3_SINGLE_PATH 0
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
));
43 struct extended_cssid
{
46 } __attribute__ ((packed
));
50 __u8 fc
; /* SPID function code */
51 struct path_state ps
; /* SNID path state */
52 } __attribute__ ((packed
)) inf
;
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
));
65 * struct css_driver - device driver for subchannels
66 * @owner: owning module
67 * @subchannel_type: subchannel type supported by this driver
68 * @drv: embedded device driver structure
69 * @irq: called on interrupts
70 * @chp_event: called for events affecting a channel path
71 * @sch_event: called for events affecting the subchannel
72 * @probe: function called on probe
73 * @remove: function called on remove
74 * @shutdown: called at device shutdown
75 * @prepare: prepare for pm state transition
76 * @complete: undo work done in @prepare
77 * @freeze: callback for freezing during hibernation snapshotting
78 * @thaw: undo work done in @freeze
79 * @restore: callback for restoring after hibernation
80 * @settle: wait for asynchronous work to finish
81 * @name: name of the device driver
85 struct css_device_id
*subchannel_type
;
86 struct device_driver drv
;
87 void (*irq
)(struct subchannel
*);
88 int (*chp_event
)(struct subchannel
*, struct chp_link
*, int);
89 int (*sch_event
)(struct subchannel
*, int);
90 int (*probe
)(struct subchannel
*);
91 int (*remove
)(struct subchannel
*);
92 void (*shutdown
)(struct subchannel
*);
93 int (*prepare
) (struct subchannel
*);
94 void (*complete
) (struct subchannel
*);
95 int (*freeze
)(struct subchannel
*);
96 int (*thaw
) (struct subchannel
*);
97 int (*restore
)(struct subchannel
*);
102 #define to_cssdriver(n) container_of(n, struct css_driver, drv)
105 * all css_drivers have the css_bus_type
107 extern struct bus_type css_bus_type
;
109 extern int css_driver_register(struct css_driver
*);
110 extern void css_driver_unregister(struct css_driver
*);
112 extern void css_sch_device_unregister(struct subchannel
*);
113 extern int css_probe_device(struct subchannel_id
);
114 extern struct subchannel
*get_subchannel_by_schid(struct subchannel_id
);
115 extern int css_init_done
;
117 int for_each_subchannel_staged(int (*fn_known
)(struct subchannel
*, void *),
118 int (*fn_unknown
)(struct subchannel_id
,
119 void *), void *data
);
120 extern int for_each_subchannel(int(*fn
)(struct subchannel_id
, void *), void *);
121 extern void css_reiterate_subchannels(void);
122 void css_update_ssd_info(struct subchannel
*sch
);
124 #define __MAX_SUBCHANNEL 65535
127 struct channel_subsystem
{
130 struct channel_path
*chps
[__MAX_CHPID
+ 1];
131 struct device device
;
132 struct pgid global_pgid
;
134 /* channel measurement related */
138 /* for orphaned ccw devices */
139 struct subchannel
*pseudo_subchannel
;
141 #define to_css(dev) container_of(dev, struct channel_subsystem, device)
143 extern struct bus_type css_bus_type
;
144 extern struct channel_subsystem
*channel_subsystems
[];
146 /* Helper functions to build lists for the slow path. */
147 void css_schedule_eval(struct subchannel_id schid
);
148 void css_schedule_eval_all(void);
149 int css_complete_work(void);
151 int sch_is_pseudo_sch(struct subchannel
*);
153 int css_sch_is_valid(struct schib
*);
155 extern struct workqueue_struct
*cio_work_q
;
156 void css_wait_for_slow_path(void);
157 void css_sched_sch_todo(struct subchannel
*sch
, enum sch_todo todo
);