On Thu, Aug 16, 2012 at 07:03:50AM +0000, Arnd Bergmann wrote:

On Thursday 16 August 2012, Thierry Reding wrote:

quoted

At least for the config space this is incorrect. There's a single region
to access the configuration space for all devices below the PCIe
controller. So it is shared by both (Tegra20) or all three (Tegra30)
root ports.

I'm not sure about PCI domains. Do you have any good pointers as to
where I could read up on them? If they need special hardware support,
then I think Tegra doesn't support them either. At least I haven't come
across any mention of domains while going through the, admittedly some-
what sparse on PCIe, Tegra documentation.

I was referring to the same thing here: if you had a separate config
space for each root port, they would by definition be separate PCI
domain. So you don't have them.

I see, that makes sense. Thanks for explaining.

Thierry