linux-kernel - [PATCH v5 3/5] arm64: dts: qcom: sdm845: add SLPI FastRPC support

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Message-Id: <20230406173148.28309-4-me@dylanvanassche.be>
Date:   Thu,  6 Apr 2023 19:31:46 +0200
From:   Dylan Van Assche <me@...anvanassche.be>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Dylan Van Assche <me@...anvanassche.be>
Subject: [PATCH v5 3/5] arm64: dts: qcom: sdm845: add SLPI FastRPC support

Qualcomm SDM845 SoC features a SLPI DSP which uses FastRPC through
an allocated memory region to load files from the host filesystem
such as sensor configuration files.

Add a FastRPC node at /dev/fastrpc-sdsp and a DMA region, similar to
downstream, to allow userspace to communicate with the SLPI via the
FastRPC interface for initializing the sensors on the SLPI.

Signed-off-by: Dylan Van Assche <me@...anvanassche.be>
---
 arch/arm64/boot/dts/qcom/sdm845.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 338a715d110a..dc4b553cbe2e 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -13,6 +13,7 @@
 #include <dt-bindings/clock/qcom,rpmh.h>
 #include <dt-bindings/clock/qcom,videocc-sdm845.h>
 #include <dt-bindings/dma/qcom-gpi.h>
+#include <dt-bindings/firmware/qcom,scm.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interconnect/qcom,osm-l3.h>
 #include <dt-bindings/interconnect/qcom,sdm845.h>
@@ -878,6 +879,14 @@ mdata_mem: mpss-metadata {
 			size = <0 0x4000>;
 			no-map;
 		};
+
+		fastrpc_mem: fastrpc {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;
+			alignment = <0x0 0x400000>;
+			size = <0x0 0x1000000>;
+			reusable;
+		};
 	};
 
 	adsp_pas: remoteproc-adsp {
@@ -3358,6 +3367,23 @@ glink-edge {
 				label = "dsps";
 				qcom,remote-pid = <3>;
 				mboxes = <&apss_shared 24>;
+
+				fastrpc {
+					compatible = "qcom,fastrpc";
+					qcom,glink-channels = "fastrpcglink-apps-dsp";
+					label = "sdsp";
+					qcom,non-secure-domain;
+					qcom,vmids = <QCOM_SCM_VMID_HLOS QCOM_SCM_VMID_MSS_MSA
+						      QCOM_SCM_VMID_SSC_Q6 QCOM_SCM_VMID_ADSP_Q6>;
+					memory-region = <&fastrpc_mem>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					compute-cb@0 {
+						compatible = "qcom,fastrpc-compute-cb";
+						reg = <0>;
+					};
+				};
 			};
 		};
 
-- 
2.39.2