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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@de.ibm.com>
Author.

COPYRIGHT

April 2019 Kernel Hackers Manual 4.9.