struct_ccw1 (9)

struct ccw1 {
  __u8 cmd_code;
  __u8 flags;
  __u16 count;
  __u32 cda;
};

cmd_code

command code

flags

flags, like IDA addressing, etc.

count

byte count

cda

data address

The ccw is the basic structure to build channel programs that perform operations with the device or the control unit. Only Format-1 channel command words are supported.

Cornelia Huck <[email protected]>

Author.