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 * @creator_id: unique number of the driver 10 * @state: online/offline state 11 * @count: number of attached slave devices 12 * @dev: embedded device structure 13 * @cdev: variable number of slave devices, allocated as needed 14 */ 15 struct ccwgroup_device { 16 unsigned long creator_id; 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 ccw_device *cdev[0]; 28 }; 29 30 /** 31 * struct ccwgroup_driver - driver for ccw group devices 32 * @max_slaves: maximum number of slave devices 33 * @driver_id: unique id 34 * @probe: function called on probe 35 * @remove: function called on remove 36 * @set_online: function called when device is set online 37 * @set_offline: function called when device is set offline 38 * @shutdown: function called when device is shut down 39 * @prepare: prepare for pm state transition 40 * @complete: undo work done in @prepare 41 * @freeze: callback for freezing during hibernation snapshotting 42 * @thaw: undo work done in @freeze 43 * @restore: callback for restoring after hibernation 44 * @driver: embedded driver structure 45 */ 46 struct ccwgroup_driver { 47 int max_slaves; 48 unsigned long driver_id; 49 50 int (*probe) (struct ccwgroup_device *); 51 void (*remove) (struct ccwgroup_device *); 52 int (*set_online) (struct ccwgroup_device *); 53 int (*set_offline) (struct ccwgroup_device *); 54 void (*shutdown)(struct ccwgroup_device *); 55 int (*prepare) (struct ccwgroup_device *); 56 void (*complete) (struct ccwgroup_device *); 57 int (*freeze)(struct ccwgroup_device *); 58 int (*thaw) (struct ccwgroup_device *); 59 int (*restore)(struct ccwgroup_device *); 60 61 struct device_driver driver; 62 }; 63 64 extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver); 65 extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver); 66 int ccwgroup_create_from_string(struct device *root, unsigned int creator_id, 67 struct ccw_driver *cdrv, int num_devices, 68 const char *buf); 69 70 extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev); 71 extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev); 72 73 #define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev) 74 #define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver) 75 #endif 76