Why does the Avalon-MM DMA Hard IP for PCIe fail to return data for small DMA transfers?

Description

The Arria® 10 Hard IP for PCI Express with Avalon-MM DMA IP Core fails to return data for small DMA transfers. This problem can occur when the read size is less than 128bytes and the source address is aligned to 256bytes.

Resolution

This problem is fixed starting in the Quartus® Prime software version 16.1.