Infiniband via Virtex-II Pro RocketIOs (keywords: Virtex2, RocketIO, Rocket I/O)

Hello, at present I am working on an Infiniband implementation on a Virtex-II Pro. As far as I know the build-in RocketIOs are fully compliant to the Infiniband standard (beacon and variant CRC excluded). There are two types of CRC, the invariant and the variant type. Although the RocketIOs are able to calculate at least one type, i.e. the invariant CRC, you cannot make use of it in this particular case. The reason for this is that the invariant CRC is needed for the variant CRC type which you have to handle yourself, anyway. Has anyone ever tried or finished an Infiniband implementation inside the V2P/RocketIOs and could share his experience with me? Or is there any example implementation for the whole CRC calculation inside the FPGA fabric available? I wonder how one could ever reach the typical 2.5 Gbit/s Infiniband transmission rate when almost all functions must be handled inside the FPGA fabric? Still some other questions: Could someone please help me on the question how often the beacon signal should be repeated before synchronisation is sufficiently established? And what about the packet generation? There are several IBA packet structures. If I assume a plain point-to-point connection it surely would not be necessary to include all that global routing stuff inside the header. So what would be the adequate format to use? The "local packet" structure or maybe just "raw packets"? If someone got the slightest clue, please post a write an email! Any answer is appreciated. Best regards, Bruce

Keywords: FPGA, Xilinx, Virtex 2, Virtex2, Virtex-2, Virtex II, VirtexII, Virtex-II, RocketIO, RocketI/O, RocketIOs, RocketI/Os, Rocket IO, Rocket I/O, Rocket IOs, Rocket I/Os, Virtex2Pro, VirtexIIPro, MGT, SerDes, Gigabit Transmission, Infiniband, Beacon Signal, Synchronisation, Gbit, Gb, Gbit/s, Gbits, Gb/s, Gbs, P2P, IBA

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Break your question up into paragraphs, with one theme per. I can't even begin to appreciate what your problem is from the above, because I am just not willing to try to parse it. I am sure others feel the same way.

Chuck F ( (
   Available for consulting/temporary embedded and systems.
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