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Date:   Mon, 6 Jul 2020 19:09:17 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Vidya Sagar <vidyas@...dia.com>, <robh+dt@...nel.org>,
        <treding@...dia.com>, <thierry.reding@...il.com>
CC:     <lorenzo.pieralisi@....com>, <amurray@...goodpenguin.co.uk>,
        <bhelgaas@...gle.com>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>, <sagar.tv@...il.com>
Subject: Re: [PATCH] arm64: tegra: Re-order PCIe aperture mappings


On 06/07/2020 18:14, Vidya Sagar wrote:
> Re-order Tegra194's PCIe aperture mappings to have IO window moved to
> 64-bit aperture and have the entire 32-bit aperture used for accessing
> the configuration space. This makes it to use the entire 32MB of the 32-bit
> aperture for ECAM purpose while booting through ACPI.
> 
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
> ---
>  arch/arm64/boot/dts/nvidia/tegra194.dtsi | 36 ++++++++++++------------
>  1 file changed, 18 insertions(+), 18 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> index 4bc187a4eacd..2b378fa06d19 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> @@ -1404,9 +1404,9 @@
>  		nvidia,aspm-l0s-entrance-latency-us = <3>;
>  
>  		bus-range = <0x0 0xff>;
> -		ranges = <0x81000000 0x0  0x30100000 0x0  0x30100000 0x0 0x00100000   /* downstream I/O (1MB) */
> -			  0xc3000000 0x12 0x00000000 0x12 0x00000000 0x0 0x30000000   /* prefetchable memory (768MB) */
> -			  0x82000000 0x0  0x40000000 0x12 0x30000000 0x0 0x10000000>; /* non-prefetchable memory (256MB) */
> +		ranges = <0xc3000000 0x12 0x00000000 0x12 0x00000000 0x0 0x30000000   /* prefetchable memory (768MB) */
> +			  0x82000000 0x00 0x40000000 0x12 0x30000000 0x0 0x0fff0000   /* non-prefetchable memory (256MB - 64KB) */
> +			  0x81000000 0x00 0x00000000 0x12 0x3fff0000 0x0 0x00010000>; /* downstream I/O (64KB) */
>  	};
>  
>  	pcie@...20000 {
> @@ -1449,9 +1449,9 @@
>  		nvidia,aspm-l0s-entrance-latency-us = <3>;
>  
>  		bus-range = <0x0 0xff>;
> -		ranges = <0x81000000 0x0  0x32100000 0x0  0x32100000 0x0 0x00100000   /* downstream I/O (1MB) */
> -			  0xc3000000 0x12 0x40000000 0x12 0x40000000 0x0 0x30000000   /* prefetchable memory (768MB) */
> -			  0x82000000 0x0  0x40000000 0x12 0x70000000 0x0 0x10000000>; /* non-prefetchable memory (256MB) */
> +		ranges = <0xc3000000 0x12 0x40000000 0x12 0x40000000 0x0 0x30000000   /* prefetchable memory (768MB) */
> +			  0x82000000 0x00 0x40000000 0x12 0x70000000 0x0 0x0fff0000   /* non-prefetchable memory (256MB - 64KB) */
> +			  0x81000000 0x00 0x00000000 0x12 0x7fff0000 0x0 0x00010000>; /* downstream I/O (64KB) */
>  	};
>  
>  	pcie@...40000 {
> @@ -1494,9 +1494,9 @@
>  		nvidia,aspm-l0s-entrance-latency-us = <3>;
>  
>  		bus-range = <0x0 0xff>;
> -		ranges = <0x81000000 0x0  0x34100000 0x0  0x34100000 0x0 0x00100000   /* downstream I/O (1MB) */
> -			  0xc3000000 0x12 0x80000000 0x12 0x80000000 0x0 0x30000000   /* prefetchable memory (768MB) */
> -			  0x82000000 0x0  0x40000000 0x12 0xb0000000 0x0 0x10000000>; /* non-prefetchable memory (256MB) */
> +		ranges = <0xc3000000 0x12 0x80000000 0x12 0x80000000 0x0 0x30000000   /* prefetchable memory (768MB) */
> +			  0x82000000 0x00 0x40000000 0x12 0xb0000000 0x0 0x0fff0000   /* non-prefetchable memory (256MB - 64KB) */
> +			  0x81000000 0x00 0x00000000 0x12 0xbfff0000 0x0 0x00010000>; /* downstream I/O (64KB) */
>  	};
>  
>  	pcie@...60000 {
> @@ -1539,9 +1539,9 @@
>  		nvidia,aspm-l0s-entrance-latency-us = <3>;
>  
>  		bus-range = <0x0 0xff>;
> -		ranges = <0x81000000 0x0  0x36100000 0x0  0x36100000 0x0 0x00100000   /* downstream I/O (1MB) */
> -			  0xc3000000 0x14 0x00000000 0x14 0x00000000 0x3 0x40000000   /* prefetchable memory (13GB) */
> -			  0x82000000 0x0  0x40000000 0x17 0x40000000 0x0 0xc0000000>; /* non-prefetchable memory (3GB) */
> +		ranges = <0xc3000000 0x14 0x00000000 0x14 0x00000000 0x3 0x40000000   /* prefetchable memory (13GB) */
> +			  0x82000000 0x00 0x40000000 0x17 0x40000000 0x0 0xbfff0000   /* non-prefetchable memory (3GB - 64KB) */
> +			  0x81000000 0x00 0x00000000 0x17 0xffff0000 0x0 0x00010000>; /* downstream I/O (64KB) */
>  	};
>  
>  	pcie@...80000 {
> @@ -1584,9 +1584,9 @@
>  		nvidia,aspm-l0s-entrance-latency-us = <3>;
>  
>  		bus-range = <0x0 0xff>;
> -		ranges = <0x81000000 0x0  0x38100000 0x0  0x38100000 0x0 0x00100000   /* downstream I/O (1MB) */
> -			  0xc3000000 0x18 0x00000000 0x18 0x00000000 0x3 0x40000000   /* prefetchable memory (13GB) */
> -			  0x82000000 0x0  0x40000000 0x1b 0x40000000 0x0 0xc0000000>; /* non-prefetchable memory (3GB) */
> +		ranges = <0xc3000000 0x18 0x00000000 0x18 0x00000000 0x3 0x40000000   /* prefetchable memory (13GB) */
> +			  0x82000000 0x00 0x40000000 0x1b 0x40000000 0x0 0xbfff0000   /* non-prefetchable memory (3GB - 64KB) */
> +			  0x81000000 0x00 0x00000000 0x1b 0xffff0000 0x0 0x00010000>; /* downstream I/O (64KB) */
>  	};
>  
>  	pcie@...a0000 {
> @@ -1633,9 +1633,9 @@
>  		nvidia,aspm-l0s-entrance-latency-us = <3>;
>  
>  		bus-range = <0x0 0xff>;
> -		ranges = <0x81000000 0x0  0x3a100000 0x0  0x3a100000 0x0 0x00100000   /* downstream I/O (1MB) */
> -			  0xc3000000 0x1c 0x00000000 0x1c 0x00000000 0x3 0x40000000   /* prefetchable memory (13GB) */
> -			  0x82000000 0x0  0x40000000 0x1f 0x40000000 0x0 0xc0000000>; /* non-prefetchable memory (3GB) */
> +		ranges = <0xc3000000 0x1c 0x00000000 0x1c 0x00000000 0x3 0x40000000   /* prefetchable memory (13GB) */
> +			  0x82000000 0x00 0x40000000 0x1f 0x40000000 0x0 0xbfff0000   /* non-prefetchable memory (3GB - 64KB) */
> +			  0x81000000 0x00 0x00000000 0x1f 0xffff0000 0x0 0x00010000>; /* downstream I/O (64KB) */
>  	};
>  
>  	pcie_ep@...60000 {
> 


Acked-by: Jon Hunter <jonathanh@...dia.com>

Cheers!
Jon

-- 
nvpublic

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