LXR linux/arch/s390/include/asm/ccwgroup.h

   1#ifndef S390_CCWGROUP_H
   2#define S390_CCWGROUP_H
   3
   4struct ccw_device;
   5struct 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 * @ungroup_work: work to be done when a ccwgroup notifier has action
  14 *      type %BUS_NOTIFY_UNBIND_DRIVER
  15 */
  16struct ccwgroup_device {
  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 work_struct ungroup_work;
  28        struct ccw_device *cdev[0];
  29};
  30
  31/**
  32 * struct ccwgroup_driver - driver for ccw group devices
  33 * @setup: function called during device creation to setup the device
  34 * @remove: function called on remove
  35 * @set_online: function called when device is set online
  36 * @set_offline: function called when device is set offline
  37 * @shutdown: function called when device is shut down
  38 * @prepare: prepare for pm state transition
  39 * @complete: undo work done in @prepare
  40 * @freeze: callback for freezing during hibernation snapshotting
  41 * @thaw: undo work done in @freeze
  42 * @restore: callback for restoring after hibernation
  43 * @driver: embedded driver structure
  44 */
  45struct ccwgroup_driver {
  46        int (*setup) (struct ccwgroup_device *);
  47        void (*remove) (struct ccwgroup_device *);
  48        int (*set_online) (struct ccwgroup_device *);
  49        int (*set_offline) (struct ccwgroup_device *);
  50        void (*shutdown)(struct ccwgroup_device *);
  51        int (*prepare) (struct ccwgroup_device *);
  52        void (*complete) (struct ccwgroup_device *);
  53        int (*freeze)(struct ccwgroup_device *);
  54        int (*thaw) (struct ccwgroup_device *);
  55        int (*restore)(struct ccwgroup_device *);
  56
  57        struct device_driver driver;
  58};
  59
  60extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
  61extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
  62int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
  63                        int num_devices, const char *buf);
  64
  65extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
  66extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
  67
  68extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
  69extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);
  70
  71#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)
  72#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)
  73#endif
  74