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Fri, 9 Jun 2023 19:56:16 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::f7a7:a561:87e9:5fab]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::f7a7:a561:87e9:5fab%6]) with mapi id 15.20.6455.030; Fri, 9 Jun 2023 19:56:16 +0000 From: Jason Gunthorpe To: Andy Gross , Alim Akhtar , Bjorn Andersson , AngeloGioacchino Del Regno , Baolin Wang , Christophe Leroy , Gerald Schaefer , Heiko Stuebner , iommu@lists.linux.dev, Jernej Skrabec , Jonathan Hunter , Joerg Roedel , Kevin Tian , Konrad Dybcio , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, Russell King , linuxppc-dev@lists.ozlabs.org, Matthias Brugger , Matthew Rosato , Michael Ellerman , Nicholas Piggin , Orson Zhai , Rob Clark , Robin Murphy , Samuel Holland , Thierry Reding , Krishna Reddy , Chen-Yu Tsai , Will Deacon , Yong Wu , Chunyan Zhang Cc: Lu Baolu , Dmitry Osipenko , Marek Szyprowski , Nicolin Chen , Niklas Schnelle , Steven Price , Thierry Reding Subject: [PATCH v3 12/25] iommu/tegra-smmu: Support DMA domains in tegra Date: Fri, 9 Jun 2023 16:56:00 -0300 Message-Id: <12-v3-89830a6c7841+43d-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v3-89830a6c7841+43d-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: BY3PR05CA0039.namprd05.prod.outlook.com (2603:10b6:a03:39b::14) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|CY8PR12MB7489:EE_ X-MS-Office365-Filtering-Correlation-Id: df09db72-fb6f-47d4-8d2a-08db692395f2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: df09db72-fb6f-47d4-8d2a-08db692395f2 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Jun 2023 19:56:16.5049 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: +fPlJMs4apbZIY/zn1RTjoaeFciIVgyWvk5DRpHrvRVnmd3mKC+f5ygdTql3RL+q X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7489 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org All ARM64 iommu drivers should support IOMMU_DOMAIN_DMA to enable dma-iommu.c. tegra is blocking dma-iommu usage, and also default_domain's, because it wants an identity translation. This is needed for some device quirk. The correct way to do this is to support IDENTITY domains and use ops->def_domain_type() to return IOMMU_DOMAIN_IDENTITY for only the quirky devices. Add support for IOMMU_DOMAIN_DMA and force IOMMU_DOMAIN_IDENTITY mode for everything so no behavior changes. Signed-off-by: Jason Gunthorpe --- drivers/iommu/tegra-smmu.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index f63f1d4f0bd10f..6cba034905edbf 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -276,7 +276,7 @@ static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type) { struct tegra_smmu_as *as; - if (type != IOMMU_DOMAIN_UNMANAGED) + if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; as = kzalloc(sizeof(*as), GFP_KERNEL); @@ -989,6 +989,12 @@ static int tegra_smmu_def_domain_type(struct device *dev) } static const struct iommu_ops tegra_smmu_ops = { + /* + * FIXME: For now we want to run all translation in IDENTITY mode, + * better would be to have a def_domain_type op do this for just the + * quirky device. + */ + .default_domain = &tegra_smmu_identity_domain, .identity_domain = &tegra_smmu_identity_domain, .def_domain_type = &tegra_smmu_def_domain_type, .domain_alloc = tegra_smmu_domain_alloc,