From owner-freebsd-hackers@FreeBSD.ORG  Mon Feb  7 17:56:45 2005
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From: Stephan Uphoff <ups@tree.com>
To: Gerald Heinig <gheinig@syskonnect.de>
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Date: Mon, 07 Feb 2005 12:56:21 -0500
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cc: hackers@freebsd.org
Subject: Re: Firewire blues
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On Mon, 2005-02-07 at 04:16, Gerald Heinig wrote:
> Hi all,
> 
> I'm having problems getting two 5.3-RELEASE boxes to communicate over 
> firewire.
> I'm using two VIA Vt-6306 -based cards which are correctly recognised at 
> boot-time.
> 
> I've loaded the dcons and dconschat modules and obtained both firewire 
> addresses via fwcontrol.

I assume you mean dcons_crom module instead of dconschat.

Did you reset the firewire bus?

DCONS_CROM(4):
	.....
	BUGS
     If you load dcons_crom.ko manually after booted, you may have to
initiate
     a bus reset by ``fwcontrol -r'' to update Configuration ROM.


> When I try to set up a connection with dconschat I get
> 
> [dcons disconnected (get crom failed)]
> 
> The exact command I gave is:
> 
> dconschat -br -G 5556 -t <the remote firewire address>
> 
> I also tried setting the control ROM address with the -a option, to no 
> avail.
> 
> Anyone have any ideas as to where I'm going wrong?
> 
> BTW, I'm trying to set up remote debugging with gdb to debug a kernel hang.

I recall some issues with gdb and firewire as a module that may or may
not be fixed.
I recommend to put the dcons into the kernel to avoid any problems.

Stephan