From: Peter Chubb <peter@chubb.wattle.id.au>
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Message-ID: <16312.20420.533453.102220@wombat.chubb.wattle.id.au>
Date: Mon, 17 Nov 2003 15:34:12 +1100
To: public@mikl.as
Cc: linux-kernel@vger.kernel.org
Subject: Re: Userspace DMA
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>>>>> "Andrew" == Andrew Miklas <public@mikl.as> writes:

Andrew> Hi, Is there an accepted way of doing userspace DMA with
Andrew> Linux?

I'm currently working on a framework for user-space device drivers,
that allow suitably privileged user-space programs to set up and tear
down dma regions -- essentially exposing pci_alloc_consistent and
pci_{un}map_sg to userspace -- and also to handle interrupts in user
space.  The framework is implemented as a pair of filesystems, one for
interrupts (actually, I hijack /proc/interrupts/*)  and one for
mappings --- mainly to allow easy cleanup when the userspace program
dies.

It's not yet in a fit state to release, but contact me offline if
you'd like a copy.

--
Dr Peter Chubb  http://www.gelato.unsw.edu.au  peterc AT gelato.unsw.edu.au
The technical we do immediately,  the political takes *forever*


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