On 9/27/19 2:24 AM, Rob Herring wrote:
> This series fixes several issues related to 'dma-ranges'. Primarily,
> 'dma-ranges' in a PCI bridge node does correctly set dma masks for PCI
> devices not described in the DT. A common case needing dma-ranges is a
> 32-bit PCIe bridge on a 64-bit system. This affects several platforms
> including Broadcom, NXP, Renesas, and Arm Juno. There's been several
> attempts to fix these issues, most recently earlier this week[1].
>
> In the process, I found several bugs in the address translation. It
> appears that things have happened to work as various DTs happen to use
> 1:1 addresses.
>
> First 3 patches are just some clean-up. The 4th patch adds a unittest
> exhibiting the issues. Patches 5-9 rework how of_dma_configure() works
> making it work on either a struct device child node or a struct
> device_node parent node so that it works on bus leaf nodes like PCI
> bridges. Patches 10 and 11 fix 2 issues with address translation for
> dma-ranges.
>
> My testing on this has been with QEMU virt machine hacked up to set PCI
> dma-ranges and the unittest. Nicolas reports this series resolves the
> issues on Rpi4 and NXP Layerscape platforms.
With the following patches applied:
https://patchwork.ozlabs.org/patch/1144870/
https://patchwork.ozlabs.org/patch/1144871/
on R8A7795 Salvator-XS
Tested-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>
--
Best regards,
Marek Vasut
