Name

struct ccw1 — channel command word

Synopsis

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

Members

__u8 cmd_code

command code

__u8 flags

flags, like IDA addressing, etc.

__u16 count

byte count

__u32 cda

data address

Description

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.