1 #ifndef S390_CCWGROUP_H 2 #define S390_CCWGROUP_H 3 4 struct ccw_device; 5 struct 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 */ 16 struct 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 */ 45 struct 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 60 extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver); 61 extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver); 62 int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv, 63 int num_devices, const char *buf); 64 65 extern int ccwgroup_set_online(struct ccwgroup_device *gdev); 66 extern int ccwgroup_set_offline(struct ccwgroup_device *gdev); 67 68 extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev); 69 extern 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