I think you need to use the IGB UIO module. Going through the steps in tools/setup.sh helped me. mlx4_core (ethernet) and ib_ipoib (IPoIB) are kernel mode drivers.
Network devices using DPDK-compatible driver
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0000:43:00.0 'MT27500 Family [ConnectX-3]' drv=igb_uio unused=
0000:44:00.0 'Ethernet 10G 2P X520 Adapter' drv=igb_uio unused=
0000:44:00.1 'Ethernet 10G 2P X520 Adapter' drv=igb_uio unused=