Aborting a Completion Transfer - 3.4 English

Versal Adaptive SoC CPM Mode for PCI Express Product Guide (PG346)

Document ID
PG346
Release Date
2024-05-30
Version
3.4 English

For any Completion that includes an associated payload, the core signals an error in the transferred payload by asserting the discontinue signal in the m_axis_rc_tuser bus in the last beat of the packet. This occurs when the core has detected an uncorrectable error while reading data from its internal memories. The user application must discard the entire packet when it has detected the signal discontinue asserted in the last beat of a packet.

When the straddle option is in use, the core does not start a new Completion TLP in the same beat when it has asserted discontinue to abort the Completion TLP ending in the beat.