Message-ID: <3A0AE88D.FCA19A5A@mandrakesoft.com>
Date: Thu, 09 Nov 2000 13:10:21 -0500
From: Jeff Garzik <jgarzik@mandrakesoft.com>
Organization: MandrakeSoft
MIME-Version: 1.0
To: Steven_Snyder@3com.com
CC: linux-kernel@vger.kernel.org
Subject: Re: Porting Linux v2.2.x Ethernet driver to v2.4.x?
In-Reply-To: <88256992.00632296.00@hqoutbound.ops.3com.com>
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Sender: linux-kernel-owner@vger.kernel.org

Steven_Snyder@3com.com wrote:
> 
> Hello.
> 
> I am about to modify a Linux v2.2.x-compatible Ethernet driver to allow it to
> work in the new v2.4.x kernel.  Are there any documents which describe the
> differences in the device driver models (particularly PCI and Ethernet) of the 2
> kernel versions?  If so, where can I find them?

Not all in one place.  Read:

Documentation/pci.txt
Documentation/DMA-mapping.txt
Documentation/IO-mapping.txt
and the attached document, regarding netdevice member locking rules.

Your best reference is other PCI ethernet drivers.  grep for
'pci_module_init' in drivers/net/*.c of the most recent 2.4.x kernel,
for a good start.

Also... before you start thinking about gunking-up your driver with all
sorts of backwards-compatibility code...  remember that most 2.4.x
drivers can easily be backported to 2.2.x with a few magic macros and
static inline functions.  I have an example of this sort of thing at
http://gtf.org/garzik/drivers/kcompat24/

	Jeff


-- 
Jeff Garzik             |
Building 1024           | Would you like a Twinkie?
MandrakeSoft            |
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