On Fri, Jun 22, 2012 at 11:28 AM, Stephen Warren [off-list ref] wrote:

On 06/22/2012 11:00 AM, Stephen Warren wrote:

quoted

On 06/22/2012 05:00 AM, Thierry Reding wrote:
...

quoted

Stephen: can you try to find out whether the Tegra PCIe controller
indeed implements ECAM, or if this scheme is actually just a
proprietary variant?

Sure. I have added this request to the bug I filed requesting more
complete PCIe host documentation.

I've received unofficial confirmation that we do indeed implement a
non-standard/non-ECAM mapping, and what's in our driver matches our HW.

Interesting.  A generic ECAM/MMCONFIG solution might still be worth
thinking about.  We could easily have a hook to encapsulate the
address mapping function, while still sharing the resource management
(request_region(), etc).  Not any kind of requirement for the current
patch series, of course, just possible future work.

Bjorn