Re: Accessing PCI-E resources on 460EX

Benjamin Herrenschmidt wrote:

On Mon, 2008-11-03 at 23:09 +0200, Felix Radensky wrote:
  

quoted

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 ?
  

Thanks a lot for this input.
The problem is that I have a custom board with quite a few kernel modifications,
and I'm afraid it can take me some time to move from 2.6.26 to 2.6.28.
Any chance I can backport you modifications to 2.6.26 ? Have you modified
other files except arch/powerpc/sysdev/ppc4xx_pci.c to fix these problems ?

Cheers,
Ben.

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