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STRUCT CCW1(9) The ccw bus STRUCT CCW1(9)

NAME

struct_ccw1 - channel command word

SYNOPSIS

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

MEMBERS

cmd_code
command code

flags

flags, like IDA addressing, etc.

count

byte count

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.

AUTHOR

Cornelia Huck <cornelia.huck@de.ibm.com>
Author.

COPYRIGHT

April 2019 Kernel Hackers Manual 4.9.