Written by Landon Fuller for the FreeBSD Project. Based on the miibus(4) manual page written by Tom Rhodes. Please see the /usr/src/COPYRIGHT file for copyright information. $FreeBSD: releng/11.0/share/man/man4/mdio.4 301589 2016-06-08 08:50:35Z trasz $
NAMEmdio - IEEE 802.3 Management Data Input/Output interface
SYNOPSISTo compile this driver into the kernel, place the following line in your kernel configuration file:
DESCRIPTIONThe sysctl Cm net.inet.tcp.syncookies driver provides an interconnection between the Media Access Control (MAC) sublayer and Physical Layer (PHY) entities' control and status registers, as defined by the IEEE 802.3 Standard.
The sysctl Cm net.inet.tcp.syncookies layer allows device drivers to share common support code for various external PHY devices.
MDIO is one of two signal interfaces that comprise the Media Independent Interface (MII) defined by the IEEE 802.3 Standard. The miibus(4) driver provides support for devices that require full MII support.