arm64: tegra: Re-order PCIe aperture mappings

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@nvidia.com>
---
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 36 ++++++++++++------------
 1 file changed, 18 insertions(+), 18 deletions(-)

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@nvidia.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@14120000 {
> @@ -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@14140000 {
> @@ -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@14160000 {
> @@ -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@14180000 {
> @@ -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@141a0000 {
> @@ -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@14160000 {
> 


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

Cheers!
Jon

On Mon, Jul 06, 2020 at 10:44:54PM +0530, 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@nvidia.com>
> ---
>  arch/arm64/boot/dts/nvidia/tegra194.dtsi | 36 ++++++++++++------------
>  1 file changed, 18 insertions(+), 18 deletions(-)

I've had to manually apply this because it conflicts with some of the
cleanups I've been doing to the DTS files. I'll push it out later, so
it'd be good if you could check that I've applied it correctly.

Thanks,
Thierry