Release 4.18 arch/s390/include/asm/ccwgroup.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef S390_CCWGROUP_H

#define S390_CCWGROUP_H

struct ccw_device;
struct ccw_driver;

/**
 * struct ccwgroup_device - ccw group device
 * @state: online/offline state
 * @count: number of attached slave devices
 * @dev: embedded device structure
 * @cdev: variable number of slave devices, allocated as needed
 * @ungroup_work: work to be done when a ccwgroup notifier has action
 *      type %BUS_NOTIFY_UNBIND_DRIVER
 */

struct ccwgroup_device {
	
enum {
		
CCWGROUP_OFFLINE,
		
CCWGROUP_ONLINE,
        } 
state;
/* private: */
	
atomic_t onoff;
	
struct mutex reg_mutex;
/* public: */
	
unsigned int count;
	
struct device	dev;
	
struct work_struct ungroup_work;
	
struct ccw_device *cdev[0];
};

/**
 * struct ccwgroup_driver - driver for ccw group devices
 * @setup: function called during device creation to setup the device
 * @remove: function called on remove
 * @set_online: function called when device is set online
 * @set_offline: function called when device is set offline
 * @shutdown: function called when device is shut down
 * @prepare: prepare for pm state transition
 * @complete: undo work done in @prepare
 * @freeze: callback for freezing during hibernation snapshotting
 * @thaw: undo work done in @freeze
 * @restore: callback for restoring after hibernation
 * @driver: embedded driver structure
 * @ccw_driver: supported ccw_driver (optional)
 */

struct ccwgroup_driver {
	
int (*setup) (struct ccwgroup_device *);
	
void (*remove) (struct ccwgroup_device *);
	
int (*set_online) (struct ccwgroup_device *);
	
int (*set_offline) (struct ccwgroup_device *);
	
void (*shutdown)(struct ccwgroup_device *);
	
int (*prepare) (struct ccwgroup_device *);
	
void (*complete) (struct ccwgroup_device *);
	
int (*freeze)(struct ccwgroup_device *);
	
int (*thaw) (struct ccwgroup_device *);
	
int (*restore)(struct ccwgroup_device *);

	
struct device_driver driver;
	
struct ccw_driver *ccw_driver;
};

extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
			int num_devices, const char *buf);

extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);

extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);


#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)

#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)

#if IS_ENABLED(CONFIG_CCWGROUP)
bool dev_is_ccwgroup(struct device *dev);
#else /* CONFIG_CCWGROUP */


static inline bool dev_is_ccwgroup(struct device *dev)
{
	return false;
}
Contributors
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Sebastian Ott
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1
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Total
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1
100.00%

#endif /* CONFIG_CCWGROUP */

#endif
Overall Contributors
Person
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CommitProp
Sebastian Ott
143
45.40%
4
28.57%
Martin Schwidefsky
138
43.81%
1
7.14%
Cornelia Huck
17
5.40%
3
21.43%
Julian Wiedmann
6
1.90%
1
7.14%
Andrew Morton
5
1.59%
2
14.29%
Christian Bornträger
4
1.27%
1
7.14%
Greg Kroah-Hartman
1
0.32%
1
7.14%
Randy Dunlap
1
0.32%
1
7.14%
Total
315
100.00%
14
100.00%
Directory: arch/s390/include/asm

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