linux-kernel - [PATCH v3 6/9] arm64: tegra: Add Host1x context stream IDs on Tegra186+

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Message-Id: <20220218113952.3077606-7-mperttunen@nvidia.com>
Date:   Fri, 18 Feb 2022 13:39:49 +0200
From:   Mikko Perttunen <mperttunen@...dia.com>
To:     thierry.reding@...il.com, jonathanh@...dia.com, joro@...tes.org,
        will@...nel.org, robh+dt@...nel.org, robin.murphy@....com
Cc:     linux-tegra@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Mikko Perttunen <mperttunen@...dia.com>
Subject: [PATCH v3 6/9] arm64: tegra: Add Host1x context stream IDs on Tegra186+

Add Host1x context stream IDs on systems that support Host1x context
isolation. Host1x and attached engines can use these stream IDs to
allow isolation between memory used by different processes.

The specified stream IDs must match those configured by the hypervisor,
if one is present.

Signed-off-by: Mikko Perttunen <mperttunen@...dia.com>
---
v2:
* Added context devices on T194.
* Use iommu-map instead of custom property.
---
 arch/arm64/boot/dts/nvidia/tegra186.dtsi | 12 ++++++++++++
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 12 ++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index c91afff1b757..7c49a0281986 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -1406,6 +1406,18 @@ host1x@...00000 {
 
 		iommus = <&smmu TEGRA186_SID_HOST1X>;
 
+		memory-contexts {
+			iommu-map = <
+				0 &smmu TEGRA186_SID_HOST1X_CTX0 1
+				1 &smmu TEGRA186_SID_HOST1X_CTX1 1
+				2 &smmu TEGRA186_SID_HOST1X_CTX2 1
+				3 &smmu TEGRA186_SID_HOST1X_CTX3 1
+				4 &smmu TEGRA186_SID_HOST1X_CTX4 1
+				5 &smmu TEGRA186_SID_HOST1X_CTX5 1
+				6 &smmu TEGRA186_SID_HOST1X_CTX6 1
+				7 &smmu TEGRA186_SID_HOST1X_CTX7 1>;
+		};
+
 		dpaux1: dpaux@...40000 {
 			compatible = "nvidia,tegra186-dpaux";
 			reg = <0x15040000 0x10000>;
diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 2d48c3715fc6..240202f2669b 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -1686,6 +1686,18 @@ host1x@...00000 {
 			interconnect-names = "dma-mem";
 			iommus = <&smmu TEGRA194_SID_HOST1X>;
 
+			memory-contexts {
+				iommu-map = <
+					0 &smmu TEGRA194_SID_HOST1X_CTX0 1
+					1 &smmu TEGRA194_SID_HOST1X_CTX1 1
+					2 &smmu TEGRA194_SID_HOST1X_CTX2 1
+					3 &smmu TEGRA194_SID_HOST1X_CTX3 1
+					4 &smmu TEGRA194_SID_HOST1X_CTX4 1
+					5 &smmu TEGRA194_SID_HOST1X_CTX5 1
+					6 &smmu TEGRA194_SID_HOST1X_CTX6 1
+					7 &smmu TEGRA194_SID_HOST1X_CTX7 1>;
+			};
+
 			nvdec@...40000 {
 				compatible = "nvidia,tegra194-nvdec";
 				reg = <0x15140000 0x00040000>;
-- 
2.35.0