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Date:      Fri, 17 Nov 2000 11:48:54 -0800
From:      Lars Eggert <larse@ISI.EDU>
To:        Warner Losh <imp@village.org>, freebsd-stable@FreeBSD.ORG
Subject:   Re: Linksys PCMPC100 problem
Message-ID:  <3A158BA6.711D0F04@isi.edu>
References:  <3A0C38FF.CE45632E@isi.edu> <200011102002.NAA51294@harmony.village.org> <3A0C5B53.2A304A80@isi.edu>
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[-- Attachment #1 --]
Problem described below turned out to be caused by pcic0 being in polling
mode. Assigning a management irq to pcic0 resolves this issue.

(Now I just have to figure out why pccardd doesn't detech card
ejections/insertions when a management irq is assigned. Cards do get
attached during bootup.)

Lars Eggert wrote:
> 
> Warner Losh wrote:
> >
> > In message <3A0C38FF.CE45632E@isi.edu> Lars Eggert writes:
> > : We're getting very bad TCP throughput from a Linksys PCMPC100 card. I'm
> > : wondering if anybody can confirm this or has seen a similar problem with
> > : the Linksys card. It looks like the Linksys card is unable to perform at
> > : 100Mbit/s full-duplex speeds, packets arrive too quickly to be drained
> > : ("ed0: warning - receiver ring buffer overrun").
> >
> > This is a possible irq problem.  I see that you are using irq 7, which
> > the printer port normally uses.  If you haven't disabled this device
> > in your BIOS or if the device persists in driving IRQ 7 even when
> > disabled, you must pick another one.
> 
> I've disabled the printer port in the bios:
> [larse@dum: /home/larse] dmesg | grep ppc
> ppc0: parallel port not found.
> 
> > To find out for sure, what does vmstat tell you?
> 
> [larse@dum: /home/larse] vmstat -i
> interrupt      total      rate
> ata0 irq14       1724        9
> ata1 irq15          4        0
> fdc0 irq6           2        0
> atkbd0 irq1       331        1
> clk irq0        18881       99
> rtc irq8        24165      127
> ed0 irq7         3811       20
> Total           48918      258
> 
> I have tried to use that card under irq5, which should also be free (my
> soundcard is at irq11). However, that causes "ed0: device timeout"
> problems. Using irq3 or irq4 (with disabled serial ports) works as irq7
> does, with the "ring overrun" messages.
> 
> > The other possibility is that the card is one of the newer ones like
> > the fa-410 that needs faselect run.
> 
> faselect run? What is that/how do I enable this?
> 
> Thanks,
> Lars
> --
> Lars Eggert <larse@isi.edu>                 Information Sciences Institute
> http://www.isi.edu/larse/                University of Southern California

-- 
Lars Eggert <larse@isi.edu>                 Information Sciences Institute
http://www.isi.edu/larse/                University of Southern California
[-- Attachment #2 --]
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