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Date: Thu, 25 Jan 2024 17:55:04 +0100 From: Neil Armstrong <neil.armstrong@...aro.org> To: Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org> Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Neil Armstrong <neil.armstrong@...aro.org> Subject: [PATCH] arm64: dts: qcom: sm8650: 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. 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. Like SM8450 & SM8550, the IDs are swapped, but works fine on PCIe0 and PCIe1. WiFi PCIe Device on SM8650-QRD using GIC-ITS: 159: 0 0 0 0 0 0 0 0 ITS-MSI 0 Edge PCIe PME, aerdrv 167: 0 4 0 0 0 0 0 0 ITS-MSI 524288 Edge bhi 168: 0 0 4 0 0 0 0 0 ITS-MSI 524289 Edge mhi 169: 0 0 0 34 0 0 0 0 ITS-MSI 524290 Edge mhi 170: 0 0 0 0 3 0 0 0 ITS-MSI 524291 Edge ce0 171: 0 0 0 0 0 2 0 0 ITS-MSI 524292 Edge ce1 172: 0 0 0 0 0 0 806 0 ITS-MSI 524293 Edge ce2 173: 0 0 0 0 0 0 0 76 ITS-MSI 524294 Edge ce3 174: 0 0 0 0 0 0 0 0 ITS-MSI 524295 Edge ce5 175: 0 13 0 0 0 0 0 0 ITS-MSI 524296 Edge DP_EXT_IRQ 176: 0 0 0 0 0 0 0 0 ITS-MSI 524297 Edge DP_EXT_IRQ 177: 0 0 0 5493 0 0 0 0 ITS-MSI 524298 Edge DP_EXT_IRQ 178: 0 0 0 0 82 0 0 0 ITS-MSI 524299 Edge DP_EXT_IRQ 179: 0 0 0 0 0 7204 0 0 ITS-MSI 524300 Edge DP_EXT_IRQ 180: 0 0 0 0 0 0 672 0 ITS-MSI 524301 Edge DP_EXT_IRQ 181: 0 0 0 0 0 0 0 30 ITS-MSI 524302 Edge DP_EXT_IRQ Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org> --- arch/arm64/boot/dts/qcom/sm8650.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi index 2df77123a8c7..7b3dfcb9a57b 100644 --- a/arch/arm64/boot/dts/qcom/sm8650.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi @@ -2255,6 +2255,10 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>, interrupt-map-mask = <0 0 0 0x7>; #interrupt-cells = <1>; + /* Entries are reversed due to the unusual ITS DeviceID encoding */ + msi-map = <0x0 &gic_its 0x1401 0x1>, + <0x100 &gic_its 0x1400 0x1>; + linux,pci-domain = <0>; num-lanes = <2>; bus-range = <0 0xff>; @@ -2364,6 +2368,10 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>, interrupt-map-mask = <0 0 0 0x7>; #interrupt-cells = <1>; + /* Entries are reversed due to the unusual ITS DeviceID encoding */ + msi-map = <0x0 &gic_its 0x1481 0x1>, + <0x100 &gic_its 0x1480 0x1>; + linux,pci-domain = <1>; num-lanes = <2>; bus-range = <0 0xff>; --- base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d change-id: 20240125-topic-sm8650-upstream-pcie-its-94572c7f1a73 Best regards, -- Neil Armstrong <neil.armstrong@...aro.org>
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