AXI Streaming Intel® FPGA IP for PCI Express* User Guide

ID 790711
Date 7/08/2024
Public
Document Table of Contents

3.11.2. Debugging Data Transfer and Performance Issues

There are many possible reasons causing the PCIe* link to stop transmitting data. The PCI Express* base specification defines three types of errors, outlined in the following table:

Table 24.  Error Types Defined by the PCI Express* Base Specification
Type Responsible Agent Description
Correctable Hardware While correctable errors may affect system performance, data integrity is maintained.
Uncorrectable, non-fatal Device software Uncorrectable, non-fatal errors are defined as errors in which data is lost, but system integrity is maintained. For example, the fabric may lose a particular TLP, but it still works without problems.
Uncorrectable, fatal System software Errors generated by a loss of data and system failure are considered uncorrectable and fatal. Software must determine how to handle such errors: whether to reset the link or implement other means to minimize the problem.