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