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30 .Nd Micrel 8842/8841 PCI Ethernet controller driver
32 .Cd "kse* at pci? dev ? function ?"
36 driver supports Ethernet interfaces based on the Micrel 8842/8841
38 The 8842 has 2 Ethernet ports which behave as a managed switch to
40 It works like a T-shape connector of Ethernet data flow in which
41 an Ethernet controller sits at the leg of the T.
42 Frames can flow between the two ports while traffic destined for
43 the 8842 reaches the EMAC.
44 The 8841 is a plain 10/100 Ethernet.
47 driver distinguishes and handles them according to the HW model.
60 __STRICT_ALIGNMENT case is not written.
61 8842 media selection keeps
64 .Dq up 100baseTX-FX flow
65 when either of two ports is found link-up.
66 There is no functional provision to see and control the media
67 selection of them this moment.
68 Advanced features like flow volume bound, VLAN tag insertion/removal,
69 QoS DiffServ are not implemented and remain uncontrollable by the
72 UDP4CSUM is not very useful since the HW has an implementation
73 error for the case when a large UDP datagram is fragmented into