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Subject: Re: Accessing PCI-E resources on 460EX
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Felix Radensky <felix@embedded-sol.com>
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Date: Mon, 01 Dec 2008 18:54:45 +1100
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On Mon, 2008-11-03 at 23:09 +0200, Felix Radensky wrote:
> Hi,
> 
> I'm currently struggling with some application
> that tries to access PCI-E memory by mmaping
> address found in /sys/bus/pci/devices/<device>/resource
> 
> mmap() fails with "invalid argument" error, apparently
> because on 460EX PCI addresses are 36-bit.
> 
> What is the correct way of accessing PCI-E from
> userspace on this platform.

I fixed a lot of these problems recently. Can you try again with
2.6.28-latest-rc ?

Cheers,
Ben.