jmphy —
JMicron JMP202/JMP211 10/100/Gigabit Ethernet PHY
The jmphy driver supports the JMicron JMP202 10/100 and
  JMP211 10/100/Gigabit Ethernet PHYs.
The jmphy device driver first appeared in
  OpenBSD 4.5 and NetBSD 9.0.
The jmphy driver was written by Pyun
  YongHyeon for FreeBSD and ported to
  OpenBSD by Jonathan Gray
  <jsg@openbsd.org> and
  then ported to NetBSD by Masanobu
  SAITOH.
It the media is set to gigabit speed, it may not link up or take a very long
  time to set the link up. It depends on the link partner.