Use RxLength In Status Stream - 7.1 English

AXI DMA LogiCORE IP Product Guide (PG021)

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7.1 English

If the Control/Status Stream is enabled, checking this allows AXI DMA to use a receive length field that is supplied by the S2MM target IP in the App4 field of the status packet. This gives AXI DMA a pre-determined receive byte count, allowing AXI DMA to command the exact number of bytes to be transferred.

This option provides for a higher bandwidth solution for systems needing greater throughput. In this configuration, the S2MM target IP can supply all data bytes specified in the receive length field of status packet APP4.