Commit 3da34aa brakes MSI support on MPC8308 (possibly all MPC83xx) [REPOST]
wd at denx.de
Fri Jul 30 07:20:43 EST 2010
Dear Kumar & Kim,
any comments on this issue?
In message <4C48B384.1020006 at emcraft.com> Ilya Yanok wrote:
> Hi Kumar, Kim, Josh, everybody,
> I hope to disturb you but I haven't got any reply for my first posting...
> I've found that MSI work correctly with older kernels on my MPC8308RDB
> board and don't work with newer ones. After bisecting I've found that
> the source of the problem is commit 3da34aa:
> commit 3da34aae03d498ee62f75aa7467de93cce3030fd
> Author: Kumar Gala <galak at kernel.crashing.org>
> Date: Tue May 12 15:51:56 2009 -0500
> powerpc/fsl: Support unique MSI addresses per PCIe Root Complex
> Its feasible based on how the PCI address map is setup that the region
> of PCI address space used for MSIs differs for each PHB on the same
> Instead of assuming that the address mappes to CCSRBAR 1:1 we read
> PEXCSRBAR (BAR0) for the PHB that the given pci_dev is on.
> Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
> I can see BAR0 initialization for 85xx/86xx hardware but not for 83xx
> neigher in the kernel nor in U-Boot (that makes me think that all 83xx
> can be affected).
> I'm not actually an PCI expert so I've just tried to write IMMR base
> address to the BAR0 register from the U-Boot to get the correct address
> but this doesn't help.
> Please direct me how to init 83xx PCIE controller to make it compatible
> with this patch.
> Kim, I think MPC8315E is affected too, could you please test it?
> Thanks in advance.
> Regards, Ilya.
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