Need a simple way to identify products which support DDIO

I spent an hour trying to figure what server ethernet adapter supports DDIO.

The only credible information I found is X540-AT2 controller...

I know X540-T2 adapter uses X540 controller. But again there is no clear information whether that controler is X540-AT2 or something else.

I need to know for sure whether X540-T2 supports DDIO.