[PATCH 8/8] arm64: tegra: Add iommu-map and enable GPCDMA in Tegra264
From: Akhil R
Date: Tue Feb 17 2026 - 12:37:33 EST
Add iommu-map and remove iommus in the GPCDMA controller node so
that each channel uses separate stream ID and gets its own IOMMU
domain for memory. Also enable GPCDMA for Tegra264.
Signed-off-by: Akhil R <akhilrajeev@xxxxxxxxxx>
---
.../arm64/boot/dts/nvidia/tegra264-p3834.dtsi | 4 +++
arch/arm64/boot/dts/nvidia/tegra264.dtsi | 33 ++++++++++++++++++-
2 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi b/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi
index 7e2c3e66c2ab..c8beb616964a 100644
--- a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi
@@ -16,6 +16,10 @@ serial@c4e0000 {
serial@c5a0000 {
status = "okay";
};
+
+ dma-controller@8400000 {
+ status = "okay";
+ };
};
bus@8100000000 {
diff --git a/arch/arm64/boot/dts/nvidia/tegra264.dtsi b/arch/arm64/boot/dts/nvidia/tegra264.dtsi
index 7644a41d5f72..0317418c95d3 100644
--- a/arch/arm64/boot/dts/nvidia/tegra264.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra264.dtsi
@@ -3243,7 +3243,38 @@ gpcdma: dma-controller@8400000 {
<GIC_SPI 614 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 615 IRQ_TYPE_LEVEL_HIGH>;
#dma-cells = <1>;
- iommus = <&smmu1 0x00000800>;
+ iommu-map =
+ <1 &smmu1 0x801 1>,
+ <2 &smmu1 0x802 1>,
+ <3 &smmu1 0x803 1>,
+ <4 &smmu1 0x804 1>,
+ <5 &smmu1 0x805 1>,
+ <6 &smmu1 0x806 1>,
+ <7 &smmu1 0x807 1>,
+ <8 &smmu1 0x808 1>,
+ <9 &smmu1 0x809 1>,
+ <10 &smmu1 0x80a 1>,
+ <11 &smmu1 0x80b 1>,
+ <12 &smmu1 0x80c 1>,
+ <13 &smmu1 0x80d 1>,
+ <14 &smmu1 0x80e 1>,
+ <15 &smmu1 0x80f 1>,
+ <16 &smmu1 0x810 1>,
+ <17 &smmu1 0x811 1>,
+ <18 &smmu1 0x812 1>,
+ <19 &smmu1 0x813 1>,
+ <20 &smmu1 0x814 1>,
+ <21 &smmu1 0x815 1>,
+ <22 &smmu1 0x816 1>,
+ <23 &smmu1 0x817 1>,
+ <24 &smmu1 0x818 1>,
+ <25 &smmu1 0x819 1>,
+ <26 &smmu1 0x81a 1>,
+ <27 &smmu1 0x81b 1>,
+ <28 &smmu1 0x81c 1>,
+ <29 &smmu1 0x81d 1>,
+ <30 &smmu1 0x81e 1>,
+ <31 &smmu1 0x81f 1>;
dma-coherent;
dma-channel-mask = <0xfffffffe>;
status = "disabled";
--
2.50.1