SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The receive streaming interface on port 0 of the CPSW is responsible for receiving packet for Ethernet egress data from the packet streaming switch in the NAVSS. The CPPI receive port is equivalent to an Ethernet port with the difference being that the data is provided to the CPSW in the 128-bit streaming interface data format instead RGMII data format.
In addition to the packet data, the receive streaming interface also can provide additional control information that resides in the information words of the descriptor that was transmitted to the CPSW.
The tables below show the information that may be passed along with which descriptor information word to put it in.