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Subject: Re: Probs with PCI bus master DMA to user space
To: norbert.roos@cluster-labs.de (Norbert Roos)
Date: Tue, 20 Feb 2001 12:37:21 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <3A924D8A.FBEAD695@cluster-labs.de> from "Norbert Roos" at Feb 20, 2001 11:57:14 AM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> I'm currently writing a driver which wants to transfer data between main
> memory and a PCI device. The data buffers are allocated by the program
> which uses the driver and therefore lie in the user space. Pointers to

Allocate the buffers in the kernel and mmap() them into user space
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