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Tue, 16 May 2023 00:01:00 +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 15.20.6387.030; Tue, 16 May 2023 00:01:00 +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, Marek Szyprowski , 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 , Nicolin Chen , Niklas Schnelle , Steven Price , Thierry Reding Subject: [PATCH v2 11/25] iommu/tegra-smmu: Implement an IDENTITY domain Date: Mon, 15 May 2023 21:00:44 -0300 Message-Id: <11-v2-8d1dc464eac9+10f-iommu_all_defdom_jgg@nvidia.com> In-Reply-To: <0-v2-8d1dc464eac9+10f-iommu_all_defdom_jgg@nvidia.com> References: X-ClientProxiedBy: BL0PR1501CA0033.namprd15.prod.outlook.com (2603:10b6:207:17::46) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|PH7PR12MB6786:EE_ X-MS-Office365-Filtering-Correlation-Id: 280b1fb8-21c7-4dfe-10f1-08db55a0a1f4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1101; 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: 280b1fb8-21c7-4dfe-10f1-08db55a0a1f4 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 May 2023 00:01:00.6151 (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: vgnoWp6T63K+3QoRbcEl7R8RKO1QkTi/2VNUdZWRSvKhKEOPm+Wx+W35h9NWzqa4 X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6786 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org What tegra-smmu does during tegra_smmu_set_platform_dma() is actually putting the iommu into identity mode. Move to the new core support for ARM_DMA_USE_IOMMU by defining ops->identity_domain. Signed-off-by: Jason Gunthorpe --- drivers/iommu/tegra-smmu.c | 37 ++++++++++++++++++++++++++++++++----- 1 file changed, 32 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 1cbf063ccf147a..f63f1d4f0bd10f 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -511,23 +511,39 @@ static int tegra_smmu_attach_dev(struct iommu_domain *domain, return err; } -static void tegra_smmu_set_platform_dma(struct device *dev) +static int tegra_smmu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) { struct iommu_domain *domain = iommu_get_domain_for_dev(dev); struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - struct tegra_smmu_as *as = to_smmu_as(domain); - struct tegra_smmu *smmu = as->smmu; + struct tegra_smmu_as *as; + struct tegra_smmu *smmu; unsigned int index; if (!fwspec) - return; + return -ENODEV; + if (domain == identity_domain || !domain) + return 0; + + as = to_smmu_as(domain); + smmu = as->smmu; for (index = 0; index < fwspec->num_ids; index++) { tegra_smmu_disable(smmu, fwspec->ids[index], as->id); tegra_smmu_as_unprepare(smmu, as); } + return 0; } +static struct iommu_domain_ops tegra_smmu_identity_ops = { + .attach_dev = tegra_smmu_identity_attach, +}; + +static struct iommu_domain tegra_smmu_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &tegra_smmu_identity_ops, +}; + static void tegra_smmu_set_pde(struct tegra_smmu_as *as, unsigned long iova, u32 value) { @@ -962,11 +978,22 @@ static int tegra_smmu_of_xlate(struct device *dev, return iommu_fwspec_add_ids(dev, &id, 1); } +static int tegra_smmu_def_domain_type(struct device *dev) +{ + /* + * FIXME: For now we want to run all translation in IDENTITY mode, due + * to some device quirks. Better would be to just quirk the troubled + * devices. + */ + return IOMMU_DOMAIN_IDENTITY; +} + static const struct iommu_ops tegra_smmu_ops = { + .identity_domain = &tegra_smmu_identity_domain, + .def_domain_type = &tegra_smmu_def_domain_type, .domain_alloc = tegra_smmu_domain_alloc, .probe_device = tegra_smmu_probe_device, .device_group = tegra_smmu_device_group, - .set_platform_dma_ops = tegra_smmu_set_platform_dma, .of_xlate = tegra_smmu_of_xlate, .pgsize_bitmap = SZ_4K, .default_domain_ops = &(const struct iommu_domain_ops) {