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