Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef S390_CCWGROUP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define S390_CCWGROUP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) struct ccw_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) struct ccw_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * struct ccwgroup_device - ccw group device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * @state: online/offline state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * @count: number of attached slave devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * @dev: embedded device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * @cdev: variable number of slave devices, allocated as needed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * @ungroup_work: work to be done when a ccwgroup notifier has action
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  *	type %BUS_NOTIFY_UNBIND_DRIVER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct ccwgroup_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		CCWGROUP_OFFLINE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		CCWGROUP_ONLINE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	} state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /* private: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	atomic_t onoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	struct mutex reg_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* public: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	unsigned int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	struct device	dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	struct work_struct ungroup_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	struct ccw_device *cdev[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  * struct ccwgroup_driver - driver for ccw group devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  * @setup: function called during device creation to setup the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  * @remove: function called on remove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  * @set_online: function called when device is set online
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  * @set_offline: function called when device is set offline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  * @shutdown: function called when device is shut down
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)  * @driver: embedded driver structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  * @ccw_driver: supported ccw_driver (optional)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct ccwgroup_driver {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	int (*setup) (struct ccwgroup_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	void (*remove) (struct ccwgroup_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	int (*set_online) (struct ccwgroup_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	int (*set_offline) (struct ccwgroup_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	void (*shutdown)(struct ccwgroup_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	struct device_driver driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	struct ccw_driver *ccw_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			int num_devices, const char *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct ccwgroup_device *get_ccwgroupdev_by_busid(struct ccwgroup_driver *gdrv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 						 char *bus_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #if IS_ENABLED(CONFIG_CCWGROUP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) bool dev_is_ccwgroup(struct device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #else /* CONFIG_CCWGROUP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static inline bool dev_is_ccwgroup(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #endif /* CONFIG_CCWGROUP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #endif