gtpc1m1cTransmission Control Protocol/Internet Protocol

Using OSA-Express Support

Another link layer in the TPF system is the queued direct I/O (QDIO) link layer, which enables communication with the OSA-Express card.

Configuration Characteristics of the OSA-Express Card

The OSA-Express card has the following configuration characteristics:

Data Flow between the OSA-Express Card and the TPF System

Queued direct I/O (QDIO) is the link layer protocol that is used to communicate between the OSA-Express card and host processor (the TPF system). QDIO enables the OSA-Express card and the TPF system to share memory; therefore data transfer does not require channel programs or use the I/O subsystem. IP packets are sent or received on any I-stream.