AR# 75304

DMA/Bridge Subsystem for PCI Express (Vivado 2020.1) - Bridge Mode Root Port Config Reads to Endpoint can hang randomly


Version Found: Vivado 2020.1

Version Resolved and other Known Issues: (Xilinx Answer 65443)

When the DMA/Bridge Subsystem for PCI Express IP is configured in Bridge/Root Port mode, the config reads sent to a downstream endpoint can occasionally hang.

This issue is seen only with Config Reads. Memory Reads do not have this issue.

Also, the issue is applicable to Vivado 2020.1 only. The issue is not present in Vivado 2019.2 or earlier versions.

This article is part of the PCI Express Solution Centre

(Xilinx Answer 34536)Xilinx Solution Center for PCI Express


This a known issue to be fixed in a future version of the core.

The patch attached to this Answer Record for the 2020.1 version contains a "readme" file which includes installation instructions.

Revision History:

06/27/2020 - Initial Release


Associated Attachments

Name File Size File Type 5 MB ZIP
AR# 75304
Date 06/27/2020
Status Active
Type Known Issues