FPGA to GPUDIRECT RDMA via UDP packets

Infrastructure & Networking Software And Drivers
1

Hi,

I’m fairly new to RDMA and have a situation where I’m attempting to send UDP packets from an FPGA via 40gigE and be able to place them directly into GPU memory via a Mellanox Connectx5 card. My goal is to not have to create a full TCP stack in the FPGA to handle an RC QP type connection between the two devices but use a UD QP at the server and have it receive properly formatted UD messages from the FPGA.

I believe I can do this since the UD message appears to be a self contained message defining the RECV IBV type as well as the datagram.

I’ve also seen the examples with the QPT_RAW_PACKET type and was curious if this was possible to use at the server and still be able to place the data directly into the GPU allocated memory.

Thanks!

2

Hello Robert,

There is LwIP: http://www.nongnu.org/lwip/2_0_x/group__udp__raw.html

and maybe these can help: http://www.mellanox.com/related-docs/prod_software/RDMA_Aware_Programming_user_manual.pdf

http://www.rdmamojo.com/

Many thanks,

Steve