Port ID - 4.0 English

QDMA Subsystem for PCI Express Product Guide (PG302)

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4.0 English

Port ID is the categorization of some queues on the FPGA side. When the DMA is shared by more than one user application, the port ID provides indirection to QID so that all the interfaces can be further demuxed with lower cost. However, when used by a single application, the port ID can be ignored and drive the port id inputs to 0s.