[PATCH V1] ARM: dts: tegra: Modify pcie memory space size

Jay Agarwal jagarwal at nvidia.com
Fri Jun 21 01:30:20 EDT 2013


> On 06/20/2013 01:14 AM, Jay Agarwal wrote:
> > - decrease non-prefetch memory size to 128 MB
> > - increase prefetch memory size to 384 MB
> > - above change is done because most pcie devices
> >   prefetch memory size requirement is quite higher
> >   compared to non-prefetch memory space.
> 
> It's possible this change won't be suitable for all applications. People may
> simply need to adjust their DT based on what they want to connect.
> Still, this patch probably biases things in the correct way for now.
> Longer term, we might want to investigate dynamically sizing the windows
> in order to support arbitrary attached devices, in much the same way as the
> Marvell code does/will in order to conserve physical/bus address space for
> their multiple controllers.
> 
> However, this change allows me to correctly enumerate a particular GPU I
> have plugged into my Harmony board, and assign all the BARs, so:
> 
> Tested-by: Stephen Warren <swarren at nvidia.com>
> 
Thierry,
Could you please integrate this change also to your branch if review is done. Please let me know once it is done.



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