Get implemented Infiniband specification version of NIC


we would like to know which IB specification is implemented for our ConnectX-4 NIC.
I couldn’t find any references. I do know that IB 1.7 was released this year, but which specification is used by our hardware/software? Is there any utility I can use to find out?

What is the question that you have with regards to the spec?

We want to know which IB specs version is required to understand how our FPGA has to be designed to receive and process the IB packets.

Any update?