svn commit: r223683 - head/share/man/man4

[Pyun YongHyeon]

Author: yongari
Date: Wed Jun 29 17:32:52 2011
New Revision: 223683
URL: http://svn.freebsd.org/changeset/base/223683

Log:
  Document two known hardware errata which requires manual link
  configuration.
  
  Submitted by:	Aries Lee (arieslee <> jmicron com)

Modified:
  head/share/man/man4/jme.4

Modified: head/share/man/man4/jme.4
==============================================================================
--- head/share/man/man4/jme.4	Wed Jun 29 17:20:10 2011	(r223682)
+++ head/share/man/man4/jme.4	Wed Jun 29 17:32:52 2011	(r223683)
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd December 20, 2010
+.Dd June 29, 2011
 .Dt JME 4
 .Os
 .Sh NAME
@@ -178,3 +178,17 @@ address once station address is reprogra
 It is highly recommended not to reprogram station address and
 it is responsibility of administrator to store original station
 address into a safe place when station address should be changed.
+.Pp
+There are two known 1000baseT link establishment issues with JMC25x.
+If the full mask revision number of JMC25x controller is less than
+or equal to 4 and link partner enabled IEEE 802.3az Energy Efficient
+Ethernet feature,  the controller would not be able to establish a
+1000baseT link.
+Also if the length of cable is longer than 120 meters, controller
+can not establish a 1000baseT link.
+The known workaround for the issue is to force manual link
+configuration with 100baseTX instead of relying on auto-negotiation.
+The full mask revision number of controller could be checked with
+verbose kernel boot option.
+Use lower nibble of chip revision number to get full mask revision of
+the controller.