i have the one with 4 onboard ports.
here is how pfsense sees them
skc0: <marvell gigabit="" ethernet="">port 0xd000-0xd0ff mem 0xec02c000-0xec02ffff irq 12 at device 0.0 on pci1
skc0: Marvell Yukon Lite Gigabit Ethernet rev. (0x9)
sk0: <marvell semiconductor,="" inc.="" yukon="">on skc0
sk0: Ethernet address: xx:xx:xx:xx:xx:xx
miibus0: <mii bus="">on sk0
e1000phy0: <marvell 88e1011="" gigabit="" phy="">PHY 0 on miibus0
e1000phy0: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto
skc1: <marvell gigabit="" ethernet="">port 0xd400-0xd4ff mem 0xec020000-0xec023fff irq 10 at device 1.0 on pci1
skc1: Marvell Yukon Lite Gigabit Ethernet rev. (0x9)
sk1: <marvell semiconductor,="" inc.="" yukon="">on skc1
sk1: Ethernet address: xx:xx:xx:xx:xx:xx
miibus1: <mii bus="">on sk1
e1000phy1: <marvell 88e1011="" gigabit="" phy="">PHY 0 on miibus1
e1000phy1: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto
skc2: <marvell gigabit="" ethernet="">port 0xd800-0xd8ff mem 0xec024000-0xec027fff irq 11 at device 2.0 on pci1
skc2: Marvell Yukon Lite Gigabit Ethernet rev. (0x9)
sk2: <marvell semiconductor,="" inc.="" yukon="">on skc2
sk2: Ethernet address: xx:xx:xx:xx:xx:xx
miibus2: <mii bus="">on sk2
e1000phy2: <marvell 88e1011="" gigabit="" phy="">PHY 0 on miibus2
e1000phy2: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto
skc3: <marvell gigabit="" ethernet="">port 0xdc00-0xdcff mem 0xec028000-0xec02bfff irq 5 at device 3.0 on pci1
skc3: Marvell Yukon Lite Gigabit Ethernet rev. (0x9)
sk3: <marvell semiconductor,="" inc.="" yukon="">on skc3
sk3: Ethernet address: xx:xx:xx:xx:xx:xx
miibus3: <mii bus="">on sk3
e1000phy3: <marvell 88e1011="" gigabit="" phy="">PHY 0 on miibus3
e1000phy3: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto</marvell></mii></marvell></marvell></marvell></mii></marvell></marvell></marvell></mii></marvell></marvell></marvell></mii></marvell></marvell>