On Sun, Aug 22, 2021 at 12:40:26PM +0300, Oded Gabbay wrote: > Hi Jason, > > I think that about a year ago we talked about the custom RDMA code of > habanalabs. I tried to upstream it and you, rightfully, rejected that. > > Now that I have enough b/w to do this work, I want to start writing a > proper RDMA driver for the habanalabs Gaudi device, which I will be > able to upstream to the infiniband subsystem. > > I don't know if you remember but the Gaudi h/w is somewhat limited in > its RDMA capabilities. We are not selling a stand-alone NIC :) We just > use RDMA (or more precisely, ROCEv2) to connect between Gaudi devices. > > I'm sure I will have more specific questions down the line, but I had > hoped you could point me to a basic/not-too-complex existing driver > that I can use as a modern template. I'm also aware that I will need > to write matching code in rdma-core. drivers/infiniband/hw/efa can be seen as a good example. > > Also, I would like to add we will use the auxiliary bus feature to > connect between this driver, the main (compute) driver and the > Ethernet driver (which we are going to publish soon I hope). > > Thanks, > Oded
