arch/s390/include/asm/ccwgroup.h

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