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Mon, 23 Feb 2026 22:55:31 -0800 From: Akhil R To: CC: , , , , , , , , , , , , Subject: Re: [PATCH 8/8] arm64: tegra: Add iommu-map and enable GPCDMA in Tegra264 Date: Tue, 24 Feb 2026 12:25:30 +0530 Message-ID: <20260224065530.50701-1-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003445:EE_|CY1PR12MB9673:EE_ X-MS-Office365-Filtering-Correlation-Id: 9b2ec5dc-6ae7-4049-e4a6-08de7371bbb1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|7416014|376014|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?KYjhWdx314vRD0SxubXWGz3fXfE3FTTZzYhrbjosIdWHPiQWtOCJP8LQ2vFO?= =?us-ascii?Q?HTdLfpGgmsYXLbSuBn53vVhyVgcoVvYaqpMqXcuHgz/73d/RYzS78iszm/ye?= =?us-ascii?Q?Bb6hlSzpAp9PfVzUBQeUngtXRYFjayJDzPYBWc2ZyzbAI+wbogigyFzrBJmh?= =?us-ascii?Q?jQFXWAf6UhbJDekOhK0dFIWLFQLrJI6LQpRCLiDsnQbxpXpnI2x4BvPzPTrn?= =?us-ascii?Q?C5b6KnjfPVseitsnYXgZRhwpmTdWB8nubCHLL5xF/3gw66pS1kJg6OpmrtrD?= =?us-ascii?Q?Bgj3Ch01L2PiIxtGUhNzRwFEd8Ivgwe4Ql7Q78tDH93DpruBCNUXeUhkTovs?= =?us-ascii?Q?Lyw+IaTOXvyq16WKjnoYMXyZG71utlZQNHe+3NNLQiJ8zCEitwBL9Ljj/Cgs?= =?us-ascii?Q?DPrQpo1gk7tbufXBQfAwZYwJ+uxaTCr0XLv9YltMDQL93bd9Xqim9MwL8ZO+?= =?us-ascii?Q?YqKZz3JhetvWqZGxq8bQ9Cb4L+OyEj7TnXB9Uvh+gpJDDZjvmYv4p06INO5x?= =?us-ascii?Q?6qHKKDGn4k5GJk4Oyjae7sF5uagPJMvFDMlGClNQvjZshMPmH93WT5c1aRtl?= =?us-ascii?Q?Q+O1GFgzuGrCXgv6132r+o9HkZw9b/0JCpbwCoxYd4MuZA3aNHLXMeyIE3bk?= =?us-ascii?Q?Znr0jqrckkb3wrh/CQZ8JWFSbJG8j689QRvyFlIUDJGUTzxkSu6F49FX1H4b?= =?us-ascii?Q?sGb8kggJ4yMkgJKQNalLRGgqcIcK0Bgyn35AHFnyImGRKWUo5g/RmADlnLK8?= =?us-ascii?Q?RhDEuC7G8IT4epC7TMTZRB5xOqh0FKuRUVAz3iqJZcpie7pzhl00rwqPrviX?= =?us-ascii?Q?GCeuPhaedjKYZH6DpISr6qfihlf0LiJMn76q5k7wvA46T5lqIR+YgZPLLb2/?= =?us-ascii?Q?eb74LxCn+tQWZb7lG6P4/4lfK4fsR9RtGJ6S1ON/YhXUV8qkFG9IFhPAVf8S?= =?us-ascii?Q?Jc5LJV9whFSt1PPKWtOHzX4YQA93N3EVJzs02+Ot3orofqL+X8P6nljc4QXb?= =?us-ascii?Q?RW/15XB1/I39eXLQTvq99CrKTizKP+cAnGtiEKaHSxevwAu4eM87jJRycxwO?= =?us-ascii?Q?lspOcO8MBvOwUw5RFA0HQ1mL7MzTRUMd2IlAksg7NIZ+5ETl+URPZyezjweA?= =?us-ascii?Q?5n/S0xUQ166l8NRGsgLeVPA7jOEEENaJ/FFWs5qOoa9yPxIaEzmZ7TKravNO?= =?us-ascii?Q?mh56ra/UvSM0G+RWgOcuhtC3NVpuE9DWTZned1SAusD9srq0H+yCOvGSGBLe?= =?us-ascii?Q?HX0FnTi8y0LqOUVjF+OcGqnG97CIod+rEri90YpBqMeE/gL4+yiwbf69p6cx?= =?us-ascii?Q?lTHYr/1pRe/+70OAhYpP6fWyY+TeuWooFXVDiA040ZIFFAuc3VR3NnwXpw47?= =?us-ascii?Q?2KheY9FdmfABp0obNrVeMN61DTj6uftIe11H9tk85+4Q7NY6ZGZ5zSSv8CRQ?= =?us-ascii?Q?/0LcLBiu6YqV/H7YjJr+mBnVBgG43ziZeK4/LLMV3hE4RVfPfdzRNNsMpcpO?= =?us-ascii?Q?mojaNpIHiVPyVeYkXTIdKfuLxlqjRYMmk5dW4+q5HJJx38GAcCMMlFrgdu7T?= =?us-ascii?Q?ykw3PMtwGHgfPKt1bvibLdc3AWj0UqwnbyiWXbJKtjkl4HIBl8JwUcAOjeNv?= =?us-ascii?Q?mlj1PYG3LYjPMr9wGt9GFxoon4W1cgoZ5/O7IG6V40/NtsTtUKlD0htM6aU2?= =?us-ascii?Q?47mAVQ=3D=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(7416014)(376014)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: +Lqpbm79DUSkmDwquW/lQVaSSndXwb0YTzCUiOGYX6gbe/ApaGPY/mEfy1CEpzpaJrtEfx7RCX41UUTHC6+4Q7ahJQdCbrMCxMiViWmu8Hh9AXbGhFn5A12Z49k2IGmgsnchNonxPaL0jQdE/Jh1pR0IXEgIwo/EAhvl5wkcwYZT9eL+m2W0kgl4O64yXs+1PYh3OG+4FUjw7b8TeB68LgRMZAXCT+WqY2gVualPb28NnTpCQBN8kf74qoVQDgoBSZERfFoNB78pJOIRgHcVWDcCd8PJsIZ8DJFDp3PVDnHPIlW74k8xjETVJL7kBkZ2fhxID+DmDimmtpXaGAqDLvdUjM6W55Ude9kmYK+DGAyTQcfgEXBfITG38bbT6HKZSE8TAoVFxzJUamQqFaiv0z4QuJ4QteFkaj3tZc5NK7yXUeN///nzdixFYFxKhsdM X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Feb 2026 06:55:44.9277 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9b2ec5dc-6ae7-4049-e4a6-08de7371bbb1 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF00003445.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR12MB9673 On Tue, 17 Feb 2026 13:02:54 -0500, Frank Li wrote: > On Tue, Feb 17, 2026 at 11:04:57PM +0530, Akhil R wrote: >> 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 >> --- >> .../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 { >> , >> ; >> #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>; > > It is linear increase > <1 &smmu1 0x801 31>; Ack. I will update. > > Frank > >> dma-coherent; >> dma-channel-mask = <0xfffffffe>; >> status = "disabled"; >> -- Regards, Akhil