Updated: 2021/Apr/14

KSE(4)                       Device Drivers 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 frames.

NetBSD 9.99                      July 6, 2006                      NetBSD 9.99