STRUCT CCW_DEV_ID(9)                       The ccw bus                       STRUCT CCW_DEV_ID(9)



NAME
       struct_ccw_dev_id - unique identifier for ccw devices

SYNOPSIS
       struct ccw_dev_id {
         u8 ssid;
         u16 devno;
       };

MEMBERS
       ssid
           subchannel set id

       devno
           device number

DESCRIPTION
       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.

AUTHOR
       Cornelia Huck <cornelia.huck AT de.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      STRUCT CCW_DEV_ID(9)