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KSE(4) BSD Kernel Interfaces Manual KSE(4)
kse -- Micrel 8842/8841 PCI Ethernet controller driver
kse* at pci? dev ? function ?
The kse driver supports Ethernet interfaces based on the Micrel 8842/8841 PCI Ethernet
chips. The 8842 has 2 Ethernet ports which behave as a managed switch to bridge each other.
It works like a T-shape connector of Ethernet data flow in which an Ethernet controller sits
at the leg of the T. Frames can flow between the two ports while traffic destined for the
8842 reaches the EMAC. The 8841 is a plain 10/100 Ethernet. The kse driver distinguishes
and handles them according to the HW model.
arp(4), ifmedia(4), netintro(4), pci(4), ifconfig(8)
The kse driver was written by Tohru Nishimura.
__STRICT_ALIGNMENT case is not written. 8842 media selection keeps ``auto'' and indicates
``up 100baseTX-FX flow'' when either of two ports is found link-up. There is no functional
provision to see and control the media selection of them this moment. Advanced features
like flow volume bound, VLAN tag insertion/removal, QoS DiffServ are not implemented and
remain uncontrollable by the kse driver. UDP4CSUM is not very useful since the HW has an
implementation error for the case when a large UDP datagram is fragmented into MTU sized
BSD July 6, 2006 BSD
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