Message-ID: <47584D8C.4090000@s5r6.in-berlin.de>
Date: Thu, 06 Dec 2007 20:29:16 +0100
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
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To: "Jaursch, Bill" <bjaursch@aeshen.com>
CC: Adrian Bunk <bunk@kernel.org>,
       Leon Woestenberg <leon.woestenberg@gmail.com>,
       linux-kernel@vger.kernel.org
Subject: Re: FW: Guidance on resources for User Space Device Drivers on 2.6
 kernel
References: <32A49E5BEBD67A4F877032926EFAA4D209283BD7@ms08.mse3.exchange.ms> <20071206114912.GL15974@stusta.de> <4757ED3B.1000703@s5r6.in-berlin.de> <32A49E5BEBD67A4F877032926EFAA4D2092CCABF@ms08.mse3.exchange.ms>
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Jaursch, Bill wrote:
> The reason to even consider a driver for this "Software only" driver
> was to start the work of writing a kernel space driver (loadable
> module).  So more specifically, I wanted to know if there is a way
> to use calls to the kernel to access a loadable module that is
> running code in User Space (to take advantage of libraries, tools,
> prevention of kernel crashes, etc.).

Since you plan to use this for a PCI device eventually, it sounds like
UIO would be of help.

> I am running 2.6.20, so many of the new User Space Driver features
> don't appear to be available (UIO, User Space API, etc.).  And at
> this point I don't expect my end users to upgrade to a newer kernel.

Perhaps you can backport UIO or can get someone to do it for you.
-- 
Stefan Richter
-=====-=-=== ==-- --==-
http://arcgraph.de/sr/
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