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Re: Tulip RaQ2 64 Bit Fix

To: Martin Michlmayr <tbm@cyrius.com>
Subject: Re: Tulip RaQ2 64 Bit Fix
From: Jim Gifford <maillist@jg555.com>
Date: Mon, 16 Jan 2006 08:27:42 -0800
Cc: Linux MIPS List <linux-mips@linux-mips.org>
In-reply-to: <20060116160355.GB28383@deprecation.cyrius.com>
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References: <4393CD9F.3090305@jg555.com> <20051205114456.GA2728@linux-mips.org> <20060116160355.GB28383@deprecation.cyrius.com>
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Martin Michlmayr wrote:
* Ralf Baechle <ralf@linux-mips.org> [2005-12-05 11:44]:
The attached patch allows the tulip driver to work with the RaQ2's
network adapter. Without the patch under a 64 bit build, it will
never negotiate and will drop packets. This driver is part of
Linux Parisc, by Grant Grundler. It's currently in -mm, but Jeff
Garzick will not apply it to the main tree.
Why?

Jim, I don't think you ever responded to this.

Do you know the status of this patch?
Jeff Garzick refuses to apply it do to spinlocks. Andrew Morton is including in his tree because it fixes issue with Parisc and with MIPS based builds. So it's kinda of what is the right thing to do. I also use this driver on my x86 builds, and it actually performs better. Here is a little history of how Grant made the driver.

Grant Grundler is the network maintainer for Parisc Linux.
He discovered that the tulip driver didn't perform that well. He researched the manufactures documentation and found out how to fix the driver to work to its optimum performance. He did this back in 2003, has submitted it to Jeff Garzick several times with no response. Around late 2004, I started to do test builds on 64 bit on my RaQ2 and discovered that the driver would not auto-negotiate transfer speeds. Talked to numerous people, then someone put me in touch with Grant. I tested the driver for about 2 weeks, ask Grant why it wasn't sent upstream, he told me about the spinlock issue. I then contacted Andrew Morton, explained everything as I am here, and he agreed it was needed and tried to get Jeff to add it. Jeff sends back a one liner say doing to it's use of spinlocks it's not accepted.

That's the gory history.

--
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Jim Gifford
maillist@jg555.com


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