See Install the Adapter.
# lspci -d :2088 -v 13:00.0 Infiniband controller: Oracle/SUN Device 2088 (rev 03) Subsystem: Oracle/SUN Device 6279 Physical Slot: 4 Flags: bus master, fast devsel, latency 0 Memory at 383ff8104000 (64-bit, prefetchable) [size=16K] Memory at 383ff0000000 (64-bit, prefetchable) [size=128M] Memory at 383ff8100000 (64-bit, prefetchable) [size=16K] Expansion ROM at c7100000 [disabled] [size=1M] Capabilities: [40] Power Management version 3 Capabilities: [70] Express Endpoint, MSI 00 Capabilities: [b0] MSI-X: Enable+ Count=48 Masked- Capabilities: [100] Advanced Error Reporting Capabilities: [148] Alternative Routing-ID Interpretation (ARI) Capabilities: [158] #19 Capabilities: [188] Single Root I/O Virtualization (SR-IOV) Capabilities: [1c8] Transaction Processing Hints Capabilities: [298] Address Translation Service (ATS) Kernel driver in use: sif