I checked c220M4
http://www.cisco.com/c/dam/en/us/products/collateral/servers-unified-computing/ucs-c-series-rack-servers/c220m4-sff-spec-sheet.pdf Table 10
this are the supported HBA's
Host Bus Adapters (HBAs)
N2XX-AQPCI05
Qlogic QLE2562 Dual Port 8Gb Fibre Channel HBA
UCSC-PCIE-Q2672
Qlogic QLE2672-CSC, 16Gb Fibre Channel HBA with SR Optics
N2XX-AEPCI05
Emulex LPe 12002 Dual Port 8Gb Fibre Channel HBA
UCSC-PCIE-E16002
Emulex LPe16002-M6, 16Gb Fibre Channel HBA with SR Optics