tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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