kse(4) - NetBSD Manual Pages

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KSE(4)                  NetBSD Kernel Interfaces Manual                 KSE(4)


NAME

     kse -- Micrel 8842/8841 PCI Ethernet controller driver


SYNOPSIS

     kse* at pci? dev ? function ?


DESCRIPTION

     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 man-
     aged 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.


SEE ALSO

     arp(4), ifmedia(4), netintro(4), pci(4), ifconfig(8)


AUTHORS

     The kse driver was written by Tohru Nishimura.


BUGS

     __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 imple-
     mented 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 7.0                       July 6, 2006                       NetBSD 7.0