Re: [PATCH v3 7/9] arm64: dts: renesas: rzg3s-smarc-som: Update dma-ranges for PCIe

Claudiu Beznea
2025-07-08T10:32:26Z

Hi, Biju,

On 07.07.2025 11:18, Biju Das wrote:
> Hi Claudiu,
>
>> -----Original Message-----
>> From: Claudiu <claudiu.beznea@tuxon.dev>
>> Sent: 04 July 2025 17:14
>> Subject: [PATCH v3 7/9] arm64: dts: renesas: rzg3s-smarc-som: Update dma-ranges for PCIe
>>
>> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>>
>> The first 128MB of memory is reserved on this board for secure area.
>> Update the PCIe dma-ranges property to reflect this.
>
> I see R-Car PCIe dma-ranges[1] and [2] maps all possible DDR area supported by the SoC?
> Do we need to make board specific as well there?

I'm not familiar with R-Car, but if there are ranges reserved for other
purposes, I think we should reflect it in board specific device trees.

But that would have to be address though a different series as it has
nothing to do with enabling the RZ/G3S PCIe support.

Thank you,
Claudiu

>
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/arm64/boot/dts/renesas/r8a774e1.dtsi?h=next-20250704#n2487
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/arm64/boot/dts/renesas/salvator-common.dtsi?h=next-20250704
>
> Cheers,
> Biju
>
>>
>> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>> ---
>>
>> Changes in v3:
>> - collected tags
>>
>> Changes in v2:
>> - none, this patch is new
>>
>> arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi | 5 +++++
>> 1 file changed, 5 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-
>> smarc-som.dtsi
>> index 39845faec894..1b03820a6f02 100644
>> --- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
>> +++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
>> @@ -214,6 +214,11 @@ &sdhi2 {
>> };
>> #endif
>>
>> +&pcie {
>> + /* First 128MB is reserved for secure area. */
>> + dma-ranges = <0x42000000 0 0x48000000 0 0x48000000 0x0 0x38000000>; };
>> +
>> &pinctrl {
>> #if SW_CONFIG3 == SW_ON
>> eth0-phy-irq-hog {
>> --
>> 2.43.0
>>
>