arm64: dts: qcom: sm8450: Use GIC-ITS for PCIe0 and PCIe1

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)
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230102105821.28243-4-manivannan.sadhasivam@linaro.org

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index 70188e385d0273682a08d11d14aef1dc3d8ab17c..639146088f38d9eb6c9622efa7bdec955deea301 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -1742,9 +1742,13 @@
                        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 */
@@ -1851,9 +1855,13 @@
                        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 */