SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
There are four transmit queues in each transmit FIFO. Software has some flexibility in determining how packets are loaded into the queues and on how packet priorities are selected for transmission (how packets are removed and transmitted from queues). All ports on the switch have identical FIFO's. For the purposes of the below the transmit FIFO is switch egress even though the port 0 transmit FIFO is connected to the CPDMA receive (also switch egress). The CPDMA nomenclature is reversed from the CPGMAC_SL nomenclature due to legacy reasons.