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Arnd Bergmann - IBM Deutschland Research & Development

Infrastructure for PCIe endpoint devices

An increasing number of Linux based machines features PCI express ports that can be used as an endpoint instead of a PCI express root complex. Examples include the Triblade of the LANL Roadrunner supercomputer, embedded Linux based PCIe cards and blade servers with a switched PCIe backplane.

So far, there is no common infrastructure for this and device drivers are largely incompatible. On the way to a generic code base, we are looking at virtual device driver(virtio) providers on top of PCIe, implementation of Message Passing Interface (MPI), and possible user interfaces for setting up the devices.