[openib-general] mthca support for Arbel

[Roland Dreier]

    Robert> Does the PCI-Express HCA require any software changes to
    Robert> the HCA driver ?  i.e., will it run with an existing PCI-X
    Robert> tavor driver ?  I have heard that it does not require any
    Robert> changes, but I just wanted to confim that.

As Hal mentioned, there are two modes that the Mellanox PCIe HCA can
run in: compatible and native mode.  In compatible mode, the same
driver as for the PCI-X HCA can be used.  In native mode, new features
are exposed (memory-free mode, verbs extensions, etc), but new
software is required.

 - Roland