The auxiliary bus enables clean PCI device partitioning into multiple drivers but lacks a native signaling mechanism for bi-directional event notifications.

Dave Ertman says this restricts communication to a passive model where the parent merely exposes data for the child to consume, hindering real-time coordination for critical events like resets, configuration changes, or cross-driver resource management.

Dave has a proposal to address these challenges but there are open questions. Come and interact and provide your feedback.

More details: https://netdevconf.info/0x1A/sessions/bof/bof-need-for-bidirectional-event-h...

cheers, jamal