GPU Direct 2.0 (GPU to external device) GPUDirect

I was wondering if there is a roadmap for opening up the GPDirect for usage by external devices (like peer-to-peer, but GPU-to-external 3rd party PCIe cards). I know that Mellanox and Qlogic has infiniband cards using GPUDirect1.0 {Which I understand uses the same pinned memory shared by GPU and the infiniband card}, Is there a possibility to use direct device to device DMA transfer without going through the system memory interface at all. I know that NVIDIA has internal cards (SDI capture cards) which are able to talk to device directly already. Any info is appreciated.