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

Conor.Dooley
2022-09-02T14:29:47Z

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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