Article ID: 000082046 Content Type: Troubleshooting Last Reviewed: 04/06/2023

Why does my V-Series Avalon®-MM DMA for PCIe hang with Txs_waitrequest low?

Environment

    PCI Express
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

You will see this behavior if you accidentally issue a DMA request for zero bytes.  The request is correctly sent to the host but will be ignored causing the Hard IP for PCI Express to hang waiting on a response from the host.

Resolution

To correct this, ensure that all DMA requests are > 0 bytes.

Related Products

This article applies to 10 products

Arria® V GZ FPGA
Arria® V ST SoC FPGA
Arria® V GX FPGA
Intel® Arria® 10 GT FPGA
Arria® V GT FPGA
Intel® Arria® 10 GX FPGA
Intel® Arria® 10 SX SoC FPGA
Stratix® V GX FPGA
Stratix® V GT FPGA
Stratix® V GS FPGA

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