struct_ccw_dev_id (9)

struct ccw_dev_id {
  u8 ssid;
  u16 devno;
};

ssid

subchannel set id

devno

device number

This structure is not directly based on any hardware structure. The hardware identifies a device by its device number and its subchannel, which is in turn identified by its id. In order to get a unique identifier for ccw devices across subchannel sets, struct ccw_dev_id has been introduced.

Cornelia Huck <[email protected]>

Author.