Yea that is the nice thing that these are in the ixgbe driver now. That means that it should be in every major OS release going forward since generally Intel drivers get updated.Good news for anyone running (or wanting to run) FreeNAS on X10SDV at 10GE... Intel X557 drivers just got backported to FreeNAS 9.3.1. Nightly, but seems to be running stable.
BUILD - X10SDV-4C-TLN2F Build | FreeNAS Community