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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

__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.

AUTHOR

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

Author.

COPYRIGHT

July 2017 Kernel Hackers Manual 4.12