linux-kernel - Re: Mapping PCI memory to user-space

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Message-ID: <471EF9CD.6070400@gmail.com>
Date:	Wed, 24 Oct 2007 09:52:45 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	joncglenn <joncglenn@...mail.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Mapping PCI memory to user-space

On 10/24/2007 08:59 AM, joncglenn wrote:
> I am writing a driver to map a PCI board memory space (pcibar2) into a
> user-space vma via 'mmap'.  What is the relationship between the address
> returned from ioremap and the type of address needed in the
> 'io_remap_page_range' or 'remap_pfn_range' functions?  How about the
> following? (I am developing under RHEL4 and a 2.6.9 kernel)

I think you can use the method used for exporting pci resources in /sys. See
pci_mmap_resource. Don't know if this was yet in 2.6.9...

regards,
-- 
Jiri Slaby (jirislaby@...il.com)
Faculty of Informatics, Masaryk University
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