Device Family: Intel® Arria® 10, Intel® Arria® 10 GT, Intel® Arria® 10 GX, Intel® Arria® 10 SX

Type: Answers, Errata

Area: Intellectual Property


Last Modified: August 14, 2018
Version Found: v17.1
Bug ID: FB: 557298;

Intel® Arria® 10 Gen3 PCIe* Endpoint is not compatible with PCIe* Gen4 capable system.

Description

The Intel® Arria® 10 Gen3 PCIe* IP core will treat Gen4 Data Link Features Exchange as unsupported DLLP type (as per the PCIe* 3.0 spec), unsupported DLLP type is not being flagged as valid DLLP, so does not ungate the InitFC.

When this happens, no error is reported by the Intel® Arria® 10, this is expected.

Workaround/Fix

To work around this problem, Disable the Data Link Feature Exchange in PCIe Gen4 system [Base spec 4.0 chapter 7.7.4.2 Data Link Feature Capabilities Register (Offset 04h)] to be compatible with legacy hardware.

This problem will not be fixed in a future release of the Intel® Quartus® Prime software.