Hello, I find in documentation mention of rapidIO: https://www.kernel.org/doc/Documentation/rapidio/rapidio.txt Yet, in source code it seems that only few devices are supported with rapidIO: http://lxr.free-electrons.com/source/drivers/rapidio/ http://lxr.free-electrons.com/source/drivers/rapidio/devices But now I am not sure if it means that it is actually a generic driver for all devices, ot that my specific device (Arria V - Altera) does not have RapioIO driver support. Thank for any idea, Ran