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change the description reflecting recent driver modifications.

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nisimura 2007-10-19 04:57:48 +00:00
parent 1de52faec2
commit 6c83afd245
1 changed files with 17 additions and 18 deletions
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35
share/man/man4/kse.4
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@ -1,4 +1,4 @@
.\" $NetBSD: kse.4,v 1.4 2006/07/06 06:20:52 wiz Exp $
.\" $NetBSD: kse.4,v 1.5 2007/10/19 04:57:48 nisimura Exp $
.\"
.\" Copyright (c) 2006 Tohru Nishimura.
.\"
@ -38,8 +38,16 @@
.Sh DESCRIPTION
The
.Nm
driver supports Ethernet interfaces based on the Micrel
8842/8841 PCI Ethernet chips.
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
.Nm
driver distinguishs and handles them according to the HW model.
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
@ -52,23 +60,14 @@ The
driver was written by
.An Tohru Nishimura .
.Sh 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
.Nm
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 volume bound, VLAN tag insertion/removal,
and detailed MIB counters are not implemented and remain uncontrollable
by the
The __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
.Nm
driver.
UDP4CSUM is not very useful since the HW has an implementation