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 * @setup: function called during device creation to setup the device 35 * @probe: function called on probe 36 * @remove: function called on remove 37 * @set_online: function called when device is set online 38 * @set_offline: function called when device is set offline 39 * @shutdown: function called when device is shut down 40 * @prepare: prepare for pm state transition 41 * @complete: undo work done in @prepare 42 * @freeze: callback for freezing during hibernation snapshotting 43 * @thaw: undo work done in @freeze 44 * @restore: callback for restoring after hibernation 45 * @driver: embedded driver structure 46 */ 47 struct ccwgroup_driver { 48 int max_slaves; 49 unsigned long driver_id; 50 51 int (*setup) (struct ccwgroup_device *); 52 int (*probe) (struct ccwgroup_device *); 53 void (*remove) (struct ccwgroup_device *); 54 int (*set_online) (struct ccwgroup_device *); 55 int (*set_offline) (struct ccwgroup_device *); 56 void (*shutdown)(struct ccwgroup_device *); 57 int (*prepare) (struct ccwgroup_device *); 58 void (*complete) (struct ccwgroup_device *); 59 int (*freeze)(struct ccwgroup_device *); 60 int (*thaw) (struct ccwgroup_device *); 61 int (*restore)(struct ccwgroup_device *); 62 63 struct device_driver driver; 64 }; 65 66 extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver); 67 extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver); 68 int ccwgroup_create_dev(struct device *root, unsigned int creator_id, 69 struct ccw_driver *cdrv, struct ccwgroup_driver *gdrv, 70 int num_devices, const char *buf); 71 int ccwgroup_create_from_string(struct device *root, unsigned int creator_id, 72 struct ccw_driver *cdrv, int num_devices, 73 const char *buf); 74 75 extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev); 76 extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev); 77 78 #define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev) 79 #define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver) 80 #endif 81