From: Akhil R <akhilrajeev@nvidia.com>
To: Vinod Koul <vkoul@kernel.org>, Frank Li <Frank.Li@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
Laxman Dewangan <ldewangan@nvidia.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
<dmaengine@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: Akhil R <akhilrajeev@nvidia.com>
Subject: [PATCH v6 10/10] arm64: tegra: Enable GPCDMA in Tegra264 and add iommu-map
Date: Tue, 31 Mar 2026 15:53:03 +0530 [thread overview]
Message-ID: <20260331102303.33181-11-akhilrajeev@nvidia.com> (raw)
In-Reply-To: <20260331102303.33181-1-akhilrajeev@nvidia.com>
Enable GPCDMA in Tegra264 and add the iommu-map property so that each
channel uses a separate stream ID and gets its own IOMMU domain for
memory.
Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
---
arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi | 4 ++++
arch/arm64/boot/dts/nvidia/tegra264.dtsi | 1 +
2 files changed, 5 insertions(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi b/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi
index 7e2c3e66c2ab..58cd81bc33d7 100644
--- a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi
@@ -9,6 +9,10 @@ aliases {
};
bus@0 {
+ dma-controller@8400000 {
+ status = "okay";
+ };
+
serial@c4e0000 {
status = "okay";
};
diff --git a/arch/arm64/boot/dts/nvidia/tegra264.dtsi b/arch/arm64/boot/dts/nvidia/tegra264.dtsi
index af077420d7d9..b2f20d4b567a 100644
--- a/arch/arm64/boot/dts/nvidia/tegra264.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra264.dtsi
@@ -3244,6 +3244,7 @@ gpcdma: dma-controller@8400000 {
<GIC_SPI 615 IRQ_TYPE_LEVEL_HIGH>;
#dma-cells = <1>;
iommus = <&smmu1 0x00000800>;
+ iommu-map = <1 &smmu1 0x801 31>;
dma-coherent;
dma-channel-mask = <0xfffffffe>;
status = "disabled";
--
2.50.1
next prev parent reply other threads:[~2026-03-31 10:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-31 10:22 [PATCH v6 00/10] Add GPCDMA support in Tegra264 Akhil R
2026-03-31 10:22 ` [PATCH v6 01/10] dt-bindings: dma: nvidia,tegra186-gpc-dma: Make reset optional Akhil R
2026-03-31 10:22 ` [PATCH v6 02/10] arm64: tegra: Remove fallback compatible for GPCDMA Akhil R
2026-03-31 10:22 ` [PATCH v6 03/10] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property Akhil R
2026-03-31 10:22 ` [PATCH v6 04/10] dmaengine: tegra: Make reset control optional Akhil R
2026-03-31 10:22 ` [PATCH v6 05/10] dmaengine: tegra: Use struct for register offsets Akhil R
2026-03-31 10:22 ` [PATCH v6 06/10] dmaengine: tegra: Support address width > 39 bits Akhil R
2026-03-31 10:23 ` [PATCH v6 07/10] dmaengine: tegra: Use managed DMA controller registration Akhil R
2026-03-31 10:23 ` [PATCH v6 08/10] dmaengine: tegra: Use iommu-map for stream ID Akhil R
2026-03-31 14:12 ` Frank Li
2026-03-31 10:23 ` [PATCH v6 09/10] dmaengine: tegra: Add Tegra264 support Akhil R
2026-03-31 10:23 ` Akhil R [this message]
2026-03-31 18:06 ` [PATCH v6 00/10] Add GPCDMA support in Tegra264 Jon Hunter
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