linux-kernel - [PATCH v5 6/9] arm64: tegra: Add Host1x context stream IDs on Tegra186+

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Message-Id: <20220516085258.1227691-7-cyndis@kapsi.fi>
Date:   Mon, 16 May 2022 11:52:55 +0300
From:   cyndis@...si.fi
To:     thierry.reding@...il.com, jonathanh@...dia.com, joro@...tes.org,
        will@...nel.org, robin.murphy@....com, robh+dt@...nel.org,
        krzysztof.kozlowski@...onical.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 v5 6/9] arm64: tegra: Add Host1x context stream IDs on Tegra186+

From: Mikko Perttunen <mperttunen@...dia.com>

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.
v4:
* Remove memory-contexts subnode.
---
 arch/arm64/boot/dts/nvidia/tegra186.dtsi | 11 +++++++++++
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 11 +++++++++++
 2 files changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index 0e9afc3e2f26..5f560f13ed93 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -1461,6 +1461,17 @@ host1x@...00000 {
 
 		iommus = <&smmu TEGRA186_SID_HOST1X>;
 
+		/* Context isolation domains */
+		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 d1f8248c00f4..613fd71dec25 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -1769,6 +1769,17 @@ host1x@...00000 {
 			interconnect-names = "dma-mem";
 			iommus = <&smmu TEGRA194_SID_HOST1X>;
 
+			/* Context isolation domains */
+			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>;
-- 
2.36.1