What's the current state-of-the-art for network interface -> GPGPU DMA? I recall reading a while ago that NVIDIA was working on the ability to DMA directly off

What's the current state-of-the-art for network interface -> GPGPU DMA? I recall reading a while ago that NVIDIA was working on the ability to DMA directly off certain network cards into GPU RAM. Has this come to fruition? For this kind of application, is there a meaningful speed-up by fetching data from some central data source directly into GPU memory rather than doing the network interface -> RAM -> GPGPU RAM?