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Document the reciever lockup workaround

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abs 2005-10-15 22:28:13 +00:00
parent eb9395f8c7
commit 7e80374049
1 changed files with 15 additions and 1 deletions
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16
share/man/man4/fxp.4
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@ -1,4 +1,4 @@
.\" $NetBSD: fxp.4,v 1.12 2005/09/09 14:11:39 drochner Exp $
.\" $NetBSD: fxp.4,v 1.13 2005/10/15 22:28:13 abs Exp $
.\"
.\" Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -76,6 +76,17 @@ This option is enabled by setting the
.Dq link0
option with
.Xr ifconfig 8 .
.Pp
Some chipset revisions can suffer from a receiver-side lockup bug which
can be mitigated by resetting the chip every sixteen seconds without
traffic. Since the probe for affected chipsets generates false positives
and the workaround can cause momentary loss of responsiveness, particularly
noticeable when playing audio, the workaround is not enabled by default.
The boot messages will indicate if any interface may have this issue.
The workaround is enabled by setting the
.Dq link1
option with
.Xr ifconfig 8 .
.Sh HARDWARE
Cards supported by the
.Nm
@ -132,6 +143,9 @@ panic the system.
The MDIO failed to become ready during an MII read operation.
.It "fxp0: fxp_mdi_write: timed out"
The MDIO failed to become ready during an MII write operation.
.It "fxp0: May need receiver lock-up workaround"
The interface may need to be periodically reset to workaround a receiver
lock-up bug.
.El
.Sh SEE ALSO
.Xr cardbus 4 ,