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AE(4)			    Kernel Interfaces Manual			 AE(4)

NAME
       ae -- Attansic/Atheros L2 FastEthernet controller driver

SYNOPSIS
       To  compile  this  driver into the kernel, place	the following lines in
       your kernel configuration file:

	     device miibus
	     device ae

       Alternatively, to load the driver as a module at	boot time,  place  the
       following line in loader.conf(5):

	     if_ae_load="YES"

DESCRIPTION
       The  ae	device	driver	provides  support for Attansic/Atheros L2 PCIe
       FastEthernet controllers.

       The controller supports hardware	Ethernet checksum processing, hardware
       VLAN tag	stripping/insertion and	 an  interrupt	moderation  mechanism.
       Attansic	L2 also	features a 64-bit multicast hash filter.

       The ae driver supports the following media types:

       autoselect   Enable  autoselection  of the media	type and options.  The
		    user can manually override the autoselected	mode by	adding
		    media options to rc.conf(5).

       10baseT/UTP  Select 10Mbps operation.

       100baseTX    Set	100Mbps	(FastEthernet) operation.

       The ae driver provides support for the following	media options:

       full-duplex  Force full duplex operation.

       half-duplex  Force half duplex operation.

       For more	information on configuring this	device,	see ifconfig(8).

HARDWARE
       The ae driver  supports	Attansic/Atheros  L2  PCIe  FastEthernet  con-
       trollers, and is	known to support the following hardware:

       •   ASUS	EeePC 701
       •   ASUS	EeePC 900

       Other hardware may or may not work with this driver.

LOADER TUNABLES
       Tunables	 can  be set at	the loader(8) prompt before booting the	kernel
       or stored in loader.conf(5).

       hw.ae.msi_disable
	       This tunable disables MSI support  on  the  Ethernet  hardware.
	       The default value is 0.

SYSCTL VARIABLES
       The  ae driver collects a number	of useful MAC counter during the work.
       The statistics is available via	the  dev.ae.%d.stats  sysctl(8)	 tree,
       where %d	corresponds to the controller number.

DIAGNOSTICS
       ae%d:  watchdog timeout.	 The device has	stopped	responding to the net-
       work, or	there is a problem with	the network connection (cable).

       ae%d: reset timeout.  The card reset operation has been timed out.

       ae%d: Generating	random ethernet	address.  No  valid  Ethernet  address
       was found in the	controller NVRAM and registers.	 Random	locally	admin-
       istered address with ASUS OUI identifier	will be	used instead.

SEE ALSO
       altq(4),	  arp(4),   miibus(4),	 netintro(4),	ng_ether(4),  vlan(4),
       ifconfig(8)

HISTORY
       The ae driver and this manual  page  was	 written  by  Stanislav	 Sedov
       <stas@FreeBSD.org>.  It first appeared in FreeBSD 7.1.

BUGS
       The Attansic L2 FastEthernet controller supports	DMA but	does not use a
       descriptor  based  transfer mechanism via scatter-gather	DMA.  Thus the
       data should be copied to/from the  controller  memory  on  each	trans-
       mit/receive.   Furthermore, a lot of data alignment restrictions	apply.
       This may	introduce a high CPU load on systems with heavy	network	activ-
       ity.  Luckily enough this should	not be a problem on modern hardware as
       L2 does not support speeds faster than 100Mbps.

FreeBSD	13.2			 May 17, 2019				 AE(4)
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | LOADER TUNABLES | SYSCTL VARIABLES | DIAGNOSTICS | SEE ALSO | HISTORY | BUGS

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