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