linux-kernel - Re: [PATCH v2 7/7] arm64: dts: ti: k3-j784s4-j742s2-main-common: switch to 64-bit address space for PCIe0 and PCIe1

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Message-ID: <d987c7f7-181a-4d1a-a88c-3b6c5aac6f63@ti.com>
Date: Wed, 23 Apr 2025 09:37:39 +0530
From: "Kumar, Udit" <u-kumar1@...com>
To: Siddharth Vadapalli <s-vadapalli@...com>, <nm@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>
Subject: Re: [PATCH v2 7/7] arm64: dts: ti: k3-j784s4-j742s2-main-common:
 switch to 64-bit address space for PCIe0 and PCIe1


On 4/22/2025 5:30 PM, Siddharth Vadapalli wrote:
> The PCIe0 and PCIe1 instances of PCIe in J742S2 and J784S4 SoCs support:
> 1. 128 MB address region in the 32-bit address space
> 2. 4 GB address region in the 64-bit address space
>
> The default configuration is that of a 128 MB address region in the
> 32-bit address space. While this might be sufficient for most use-cases,
> it is insufficient for supporting use-cases which require larger address
> spaces. Therefore, switch to using the 64-bit address space with a 4 GB
> address region.
>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
> ---
>
> [..]
> +			 <0x02000000 0x00 0x00101000 0x41 0x00101000 0x00 0xffeff000>; /* 32-bit Non-Prefetchable MEM (4 GB - 1 MB - 4 KB) */

Reviewed-by: Udit Kumar <u-kumar1@...com>


>   		dma-ranges = <0x02000000 0x0 0x0 0x0 0x0 0x10000 0x0>;
>   		status = "disabled";
>   	};