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  * @ungroup_work: work to be done when a ccwgroup notifier has action
  14  *      type %BUS_NOTIFY_UNBIND_DRIVER
  15  */
  16 struct 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  */
  45 struct 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
  60 extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
  61 extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
  62 int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
  63                         int num_devices, const char *buf);
  64
  65 extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
  66 extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
  67
  68 extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
  69 extern 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