ae(4) [debian man page]
AE(4) BSD 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 controllers, and is known to support the following hardware: o ASUS EeePC 701 o 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 network, 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) BUGS
The Attansic L2 FastEthernet contoller 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 transmit/receive. Furthermore, a lot of data alignment restrictions apply. This may introduce a high CPU load on systems with heavy network activity. Luckily enough this should not be a problem on modern hardware as L2 does not support speeds faster than 100Mbps. HISTORY
The ae driver and this manual page was written by Stanislav Sedov <stas@FreeBSD.org>. It first appeared in FreeBSD 7.1. BSD
October 4, 2008 BSD
Check Out this Related Man Page
AGE(4) BSD Kernel Interfaces Manual AGE(4) NAME
age -- Attansic/Atheros L1 Gigabit Ethernet driver SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device miibus device age Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): if_age_load="YES" DESCRIPTION
The age device driver provides support for Attansic/Atheros L1 PCI Express Gigabit Ethernet controllers. All LOMs supported by the age driver have TCP/UDP/IP checksum offload for both transmit and receive, TCP segmentation offload (TSO), hardware VLAN tag stripping/insertion features and an interrupt moderation mechanism as well as a 64-bit multicast hash filter. The L1 also supports Jumbo Frames (up to 10240 bytes), which can be configured via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility configures the adapter to receive and transmit Jumbo Frames. The age 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 Set 10Mbps operation. 100baseTX Set 100Mbps (Fast Ethernet) operation. 1000baseTX Set 1000baseTX operation over twisted pair. The age driver supports 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 age driver provides support for LOMs based on Attansic/Atheros L1 Gigabit Ethernet controller chips, including: o ASUS M2N8-VMX o ASUS M2V o ASUS M3A o ASUS P2-M2A590G o ASUS P5B-E o ASUS P5B-MX/WIFI-AP o ASUS P5B-VMSE o ASUS P5K o ASUS P5KC o ASUS P5KPL-C o ASUS P5KPL-VM o ASUS P5K-SE o ASUS P5K-V o ASUS P5L-MX o ASUS P5DL2-VM o ASUS P5L-VM 1394 o ASUS G2S LOADER TUNABLES
Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5). hw.age.msi_disable This tunable disables MSI support on the Ethernet hardware. The default value is 0. hw.age.msix_disable This tunable disables MSI-X support on the Ethernet hardware. The default value is 0. SYSCTL VARIABLES
The following variables are available as both sysctl(8) variables and loader(8) tunables: dev.age.%d.int_mod Maximum amount of time to delay interrupt processing in units of 2us. The accepted range is 0 to 65000, the default is 50 (100us). Value 0 completely disables the interrupt moderation. dev.age.%d.process_limit Maximum amount of Rx events to be processed in the event loop before rescheduling a taskqueue. The accepted range is 30 to 255, the default value is 128 events. The interface does not need to be brought down and up again before a change takes effect. dev.age.%d.stats Display lots of useful MAC counters maintained in the driver. SEE ALSO
altq(4), arp(4), miibus(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8) HISTORY
The age driver was written by Pyun YongHyeon <yongari@FreeBSD.org>. It first appeared in FreeBSD 7.1. BSD September 18, 2008 BSD