Adding PHY driver to 5.1 release

["Michael T. Davis" <DAVISM%ecr6.ohio-state.edu@localhost>]

        I just installed 5.1 release (i386) on a system, but I'm having trouble
talking to my Intel NICs.  This is what dmesg has to say about one of them:

wm0 at pci1 dev 4 function 0: Intel i82541PI 1000BASE-T Ethernet, rev. 5
wm0: interrupting at ioapic0 pin 16
wm0: 32-bit 33MHz PCI bus
wm0: 64 word (6 address bits) MicroWire EEPROM
wm0: Ethernet address 00:0e:0c:82:96:0a
igphy0 at wm0 phy 1: Intel IGP01E1000 Gigabit PHY, rev. 0
igphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT,
 1000baseT-FDX, auto

I have the interface configured with an IP address (via /etc/ifconfig.wm0), but
attaching a live cable doesn't do anything.  (`ifconfig wm0' reports "status:
no carrier."  FWIW, it also reports "enabled=0.")  I note that the kernel is
configured with igphy device support (per the sources), but there's no man
page, whereas there is an igphy man page at www.netbsd.org.  Is the 5.1
release missing something which is preventing me from using this NIC?  If so,
what's the most straightforward mechanism for acquiring it?  Or do I just need
to tweak a setting somewhere?

Thanks,
Mike