On Thu, Sep 25, 2014 at 1:31 AM, Arnd Bergmann [off-list ref] wrote:

On Thursday 25 September 2014 00:37:00 Sunil Kovvuri wrote:

quoted

On Thu, Sep 25, 2014 at 12:04 AM, Arnd Bergmann [off-list ref] wrote:

quoted

On Wednesday 24 September 2014 23:34:04 Sunil Kovvuri wrote:

quoted

quoted

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All on-board PCI devices connected to this PCI controller have fixed resources
and doesn't have to be allocated/reassigned. Some of these devices are
SRIOV based.

I think you need to mark the ones that are nonrelocatable with flag
0x80000000, otherwise the PCI core might decide to reassign them.

Is this flag part of DT pci node properties ?
I am using IORESOURCE_PCI_FIXED flag. Its there in other patches of
the same series.

Ah, right. I checked the source code again and it seems that we don't handle
this right at the moment. I think a range that has the nonrelocatable
flag set should be used for IORESOURCE_PCI_FIXED mappings without any
host specific code, but that needs to be implemented in common code.

What connection do you envision between nonrelocatable ranges and
IORESOURCE_PCI_FIXED?  I don't know what a nonrelocatable range is,
but for IORESOURCE_PCI_FIXED, all I intend is that the PCI core should
not try to assign a different address, e.g., because the BAR is
read-only or because it's a legacy IDE/VGA/etc. range for which there
is no BAR at all.

Bjorn