iWARP port mapping is now in the iwcm core module, so it is trivial to support this, I think. See this commit for an example.
commit c1340e8aa628d65bcb5c5b7e332bde8a17851ebf
Author: Steve Wise <swise@opengridcomputing.com>
Date: Fri Feb 26 09:18:04 2016 -0600
iw_cxgb3: support for iWARP port mapping
iWARP port mapping is now in the iwcm core module, so it is trivial to support this, I think. See this commit for an example.