PCIe® core supports full duplex at Avalon®-MM interface. Both the slave (Txs*) and the master (Rxm*) are implemented independently. Hence you can utilize these interfaces simutaneously.
Article ID: 000078802 Content Type: Troubleshooting Last Reviewed: 08/12/2012
Does PCIe core support full duplex on Avalon-MM interface?
Quartus® II Subscription Edition
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Resolution The above information will be documented in the future releases of Stratix® V and Arria® V PCI Express® User Guide.