Re: [PATCH v1 2/4] riscv: dts: microchip: add fabric address translation properties

[<Conor.Dooley@microchip.com>]

On 02/09/2022 15:22, daire.mcnamara@microchip.com wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> From: Daire McNamara <daire.mcnamara@microchip.com>
> 
> On PolarFire SoC both in- & out-bound address translations occur in two
> stages. The specific translations are tightly coupled to the FPGA
> designs and supplement the {dma-,}ranges properties. The first stage of
> the translation is done by the FPGA fabric & the second by the root
> port.
> Add outbound address translation information so that the translation
> tables in the root port's bridge layer can be configured to account for
> the translation done by the FPGA fabric on Icicle Kit reference design.
> 
> Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com>

As an FYI to the PCI maintainers, I'll take this patch through the
RISC-V tree once everything else is approved as it conflicts with
some other changes that are pending there.

Thanks,
Conor.

> ---
>   arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi | 6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi
> index 98f04be0dc6b..6839650e7d1b 100644
> --- a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi
> +++ b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit-fabric.dtsi
> @@ -57,7 +57,11 @@ pcie: pcie@3000000000 {
>                  interrupt-map-mask = <0 0 0 7>;
>                  clocks = <&fabric_clk1>, <&fabric_clk3>;
>                  clock-names = "fic1", "fic3";
> -               ranges = <0x3000000 0x0 0x8000000 0x30 0x8000000 0x0 0x80000000>;
> +               ranges = <0x0000000 0x0 0x0000000 0x30 0x0000000 0x0 0x8000000>,
> +                        <0x3000000 0x0 0x8000000 0x30 0x8000000 0x0 0x80000000>;
> +               microchip,outbound-fabric-translation-ranges =
> +                        <0x0000000 0x0 0x0000000 0x30 0x0000000 0x0 0x8000000>,
> +                        <0x3000000 0x0 0x8000000 0x30 0x8000000 0x0 0x80000000>;
>                  dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000 0x1 0x00000000>;
>                  msi-parent = <&pcie>;
>                  msi-controller;
> --
> 2.25.1
> 
> 
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