Error handling, Error handling -1 – Altera Arria 10 Avalon-MM User Manual
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Error Handling
9
2015.05.14
UG-01145_avmm
Each PCI Express compliant device must implement a basic level of error management and can optionally
implement advanced error management. The IP core implements both basic and advanced error
reporting. Error handling for a Root Port is more complex than that of an Endpoint.
Table 9-1: Error Classification
The PCI Express Base Specification defines three types of errors, outlined in the following table.
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.
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