diff options
Diffstat (limited to 'kernel/arch/s390/include/asm/ccwgroup.h')
| -rw-r--r-- | kernel/arch/s390/include/asm/ccwgroup.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/kernel/arch/s390/include/asm/ccwgroup.h b/kernel/arch/s390/include/asm/ccwgroup.h new file mode 100644 index 000000000..057ce0ca6 --- /dev/null +++ b/kernel/arch/s390/include/asm/ccwgroup.h @@ -0,0 +1,73 @@ +#ifndef S390_CCWGROUP_H +#define S390_CCWGROUP_H + +struct ccw_device; +struct ccw_driver; + +/** + * struct ccwgroup_device - ccw group device + * @state: online/offline state + * @count: number of attached slave devices + * @dev: embedded device structure + * @cdev: variable number of slave devices, allocated as needed + * @ungroup_work: work to be done when a ccwgroup notifier has action + * type %BUS_NOTIFY_UNBIND_DRIVER + */ +struct ccwgroup_device { + enum { + CCWGROUP_OFFLINE, + CCWGROUP_ONLINE, + } state; +/* private: */ + atomic_t onoff; + struct mutex reg_mutex; +/* public: */ + unsigned int count; + struct device dev; + struct work_struct ungroup_work; + struct ccw_device *cdev[0]; +}; + +/** + * struct ccwgroup_driver - driver for ccw group devices + * @setup: function called during device creation to setup the device + * @remove: function called on remove + * @set_online: function called when device is set online + * @set_offline: function called when device is set offline + * @shutdown: function called when device is shut down + * @prepare: prepare for pm state transition + * @complete: undo work done in @prepare + * @freeze: callback for freezing during hibernation snapshotting + * @thaw: undo work done in @freeze + * @restore: callback for restoring after hibernation + * @driver: embedded driver structure + */ +struct ccwgroup_driver { + int (*setup) (struct ccwgroup_device *); + void (*remove) (struct ccwgroup_device *); + int (*set_online) (struct ccwgroup_device *); + int (*set_offline) (struct ccwgroup_device *); + void (*shutdown)(struct ccwgroup_device *); + int (*prepare) (struct ccwgroup_device *); + void (*complete) (struct ccwgroup_device *); + int (*freeze)(struct ccwgroup_device *); + int (*thaw) (struct ccwgroup_device *); + int (*restore)(struct ccwgroup_device *); + + struct device_driver driver; +}; + +extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver); +extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver); +int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv, + int num_devices, const char *buf); + +extern int ccwgroup_set_online(struct ccwgroup_device *gdev); +extern int ccwgroup_set_offline(struct ccwgroup_device *gdev); + +extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev); +extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev); + +#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev) +#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver) +#endif |