diff mbox series

[v3,3/3] arm64: dts: qcom: sm8450: Use GIC-ITS for PCIe0 and PCIe1

Message ID 20230102105821.28243-4-manivannan.sadhasivam@linaro.org
State New
Headers
Series Qcom: Add GIC-ITS support to SM8450 PCIe controllers |

Commit Message

Manivannan Sadhasivam Jan. 2, 2023, 10:58 a.m. UTC 
  Both PCIe0 and PCIe1 controllers are capable of signalling the MSIs
received from endpoint devices to the CPU using GIC-ITS MSI controller.
Add support for it.

Currently, BDF (0:0.0) and BDF (1:0.0) are enabled and with the
msi-map-mask of 0xff00, all the 32 devices under these two busses can
share the same Device ID.

The GIC-ITS MSI implementation provides an advantage over internal MSI
implementation using Locality-specific Peripheral Interrupts (LPI) that
would allow MSIs to be targeted for each CPU core.

It should be noted that the MSIs for BDF (1:0.0) only works with Device
ID of 0x5980 and 0x5a00. Hence, the IDs are swapped.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8450.dtsi | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

Comments

Konrad Dybcio Jan. 2, 2023, 11:57 a.m. UTC | #1 
On 2.01.2023 11:58, Manivannan Sadhasivam wrote:
> Both PCIe0 and PCIe1 controllers are capable of signalling the MSIs
> received from endpoint devices to the CPU using GIC-ITS MSI controller.
> Add support for it.
> 
> Currently, BDF (0:0.0) and BDF (1:0.0) are enabled and with the
> msi-map-mask of 0xff00, all the 32 devices under these two busses can
> share the same Device ID.
> 
> The GIC-ITS MSI implementation provides an advantage over internal MSI
> implementation using Locality-specific Peripheral Interrupts (LPI) that
> would allow MSIs to be targeted for each CPU core.
> 
> It should be noted that the MSIs for BDF (1:0.0) only works with Device
> ID of 0x5980 and 0x5a00. Hence, the IDs are swapped.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
Tested-by: Konrad Dybcio <konrad.dybcio@linaro.org> # Xperia 1 IV (WCN6855)

Konrad
>  arch/arm64/boot/dts/qcom/sm8450.dtsi | 20 ++++++++++++++------
>  1 file changed, 14 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 570475040d95..c4dd5838fac6 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -1733,9 +1733,13 @@ pcie0: pci@1c00000 {
>  			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
>  				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
>  
> -			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
> -			interrupt-names = "msi";
> -			#interrupt-cells = <1>;
> +			/*
> +			 * MSIs for BDF (1:0.0) only works with Device ID 0x5980.
> +			 * Hence, the IDs are swapped.
> +			 */
> +			msi-map = <0x0 &gic_its 0x5981 0x1>,
> +				  <0x100 &gic_its 0x5980 0x1>;
> +			msi-map-mask = <0xff00>;
>  			interrupt-map-mask = <0 0 0 0x7>;
>  			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
>  					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> @@ -1842,9 +1846,13 @@ pcie1: pci@1c08000 {
>  			ranges = <0x01000000 0x0 0x40200000 0 0x40200000 0x0 0x100000>,
>  				 <0x02000000 0x0 0x40300000 0 0x40300000 0x0 0x1fd00000>;
>  
> -			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
> -			interrupt-names = "msi";
> -			#interrupt-cells = <1>;
> +			/*
> +			 * MSIs for BDF (1:0.0) only works with Device ID 0x5a00.
> +			 * Hence, the IDs are swapped.
> +			 */
> +			msi-map = <0x0 &gic_its 0x5a01 0x1>,
> +				  <0x100 &gic_its 0x5a00 0x1>;
> +			msi-map-mask = <0xff00>;
>  			interrupt-map-mask = <0 0 0 0x7>;
>  			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
>  					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index 570475040d95..c4dd5838fac6 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -1733,9 +1733,13 @@  pcie0: pci@1c00000 {
 			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
 				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
 
-			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
-			interrupt-names = "msi";
-			#interrupt-cells = <1>;
+			/*
+			 * MSIs for BDF (1:0.0) only works with Device ID 0x5980.
+			 * Hence, the IDs are swapped.
+			 */
+			msi-map = <0x0 &gic_its 0x5981 0x1>,
+				  <0x100 &gic_its 0x5980 0x1>;
+			msi-map-mask = <0xff00>;
 			interrupt-map-mask = <0 0 0 0x7>;
 			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
 					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
@@ -1842,9 +1846,13 @@  pcie1: pci@1c08000 {
 			ranges = <0x01000000 0x0 0x40200000 0 0x40200000 0x0 0x100000>,
 				 <0x02000000 0x0 0x40300000 0 0x40300000 0x0 0x1fd00000>;
 
-			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
-			interrupt-names = "msi";
-			#interrupt-cells = <1>;
+			/*
+			 * MSIs for BDF (1:0.0) only works with Device ID 0x5a00.
+			 * Hence, the IDs are swapped.
+			 */
+			msi-map = <0x0 &gic_its 0x5a01 0x1>,
+				  <0x100 &gic_its 0x5a00 0x1>;
+			msi-map-mask = <0xff00>;
 			interrupt-map-mask = <0 0 0 0x7>;
 			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
 					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */