1#ifndef S390_CCWGROUP_H
2#define S390_CCWGROUP_H
3
4struct ccw_device;
5struct ccw_driver;
6
7/**
8 * struct ccwgroup_device - ccw group device
9 * @state: online/offline state
10 * @count: number of attached slave devices
11 * @dev: embedded device structure
12 * @cdev: variable number of slave devices, allocated as needed
13 * @ungroup_work: work to be done when a ccwgroup notifier has action
14 *	type %BUS_NOTIFY_UNBIND_DRIVER
15 */
16struct ccwgroup_device {
17	enum {
18		CCWGROUP_OFFLINE,
19		CCWGROUP_ONLINE,
20	} state;
21/* private: */
22	atomic_t onoff;
23	struct mutex reg_mutex;
24/* public: */
25	unsigned int count;
26	struct device	dev;
27	struct work_struct ungroup_work;
28	struct ccw_device *cdev[0];
29};
30
31/**
32 * struct ccwgroup_driver - driver for ccw group devices
33 * @setup: function called during device creation to setup the device
34 * @remove: function called on remove
35 * @set_online: function called when device is set online
36 * @set_offline: function called when device is set offline
37 * @shutdown: function called when device is shut down
38 * @prepare: prepare for pm state transition
39 * @complete: undo work done in @prepare
40 * @freeze: callback for freezing during hibernation snapshotting
41 * @thaw: undo work done in @freeze
42 * @restore: callback for restoring after hibernation
43 * @driver: embedded driver structure
44 */
45struct ccwgroup_driver {
46	int (*setup) (struct ccwgroup_device *);
47	void (*remove) (struct ccwgroup_device *);
48	int (*set_online) (struct ccwgroup_device *);
49	int (*set_offline) (struct ccwgroup_device *);
50	void (*shutdown)(struct ccwgroup_device *);
51	int (*prepare) (struct ccwgroup_device *);
52	void (*complete) (struct ccwgroup_device *);
53	int (*freeze)(struct ccwgroup_device *);
54	int (*thaw) (struct ccwgroup_device *);
55	int (*restore)(struct ccwgroup_device *);
56
57	struct device_driver driver;
58};
59
60extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
61extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
62int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
63			int num_devices, const char *buf);
64
65extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
66extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
67
68extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
69extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);
70
71#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)
72#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)
73#endif
74