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

Claudiu Beznea
2025-08-08T12:04:26Z

Hi, Bjorn,

On 08.07.2025 19:55, Bjorn Helgaas wrote:
> On Fri, Jul 04, 2025 at 07:14:07PM +0300, Claudiu wrote:
>> 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.
>
> Can we include a sentence or two about what the "secure area" means?

I'll update it.

Basically, it is a RAM region that is used by firmware.

Thank you for your review,
Claudiu

> I don't know how to connect this with anything in the driver.
>
>> 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
>>