kse(4) - NetBSD Manual Pages

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.


SEE ALSO

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


AUTHORS

     The kse driver was written by Tohru Nishimura.


BUGS

     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 the 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 kse driver is not aware of the second port's existence and
     treats the 8842 as if it was a single port 8841.  The second port PHY is
     always auto select.  The PDF documentation is unclear and inconsistent
     about whether the Rx DMA alignment restriction is removed or not.  The
     __STRICT_ALIGNMENT case is not written.  Advanced features like flow vol-
     ume bound, VLAN tag insertion/removal, and detailed MIB counters 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 4.0                       July 6, 2006                       NetBSD 4.0