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Tue, 16 May 2023 00:01:17 +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 00:01:17 +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 06/25] iommu/mtk_iommu_v1: Implement an IDENTITY domain Date: Mon, 15 May 2023 21:00:39 -0300 Message-Id: <6-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: MN2PR08CA0003.namprd08.prod.outlook.com (2603:10b6:208:239::8) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|PH7PR12MB6634:EE_ X-MS-Office365-Filtering-Correlation-Id: f4f81d3c-bb59-4ff0-2f17-08db55a0a3f2 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: f4f81d3c-bb59-4ff0-2f17-08db55a0a3f2 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 May 2023 00:01:03.8982 (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: 52UU+Z/lqnoxCrFZ1Mz2nMOq1tZ1osgGiQLuE3Q3/zVXLQT0ZE2s3osaOFlB5mQn X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6634 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org What mtk does during mtk_iommu_v1_set_platform_dma() is actually putting the iommu into identity mode. Make this available as a proper IDENTITY domain. The mtk_iommu_v1_def_domain_type() from commit 8bbe13f52cb7 ("iommu/mediatek-v1: Add def_domain_type") explains this was needed to allow probe_finalize() to be called, but now the IDENTITY domain will do the same job so change the returned def_domain_type. mkt_v1 is the only driver that returns IOMMU_DOMAIN_UNMANAGED from def_domain_type(). This allows the next patch to enforce an IDENTITY domain policy for this driver. Signed-off-by: Jason Gunthorpe --- drivers/iommu/mtk_iommu_v1.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index 8a0a5e5d049f4a..cc3e7d53d33ad9 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -319,11 +319,27 @@ static int mtk_iommu_v1_attach_device(struct iommu_domain *domain, struct device return 0; } -static void mtk_iommu_v1_set_platform_dma(struct device *dev) +static int mtk_iommu_v1_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) { struct mtk_iommu_v1_data *data = dev_iommu_priv_get(dev); mtk_iommu_v1_config(data, dev, false); + return 0; +} + +static struct iommu_domain_ops mtk_iommu_v1_identity_ops = { + .attach_dev = mtk_iommu_v1_identity_attach, +}; + +static struct iommu_domain mtk_iommu_v1_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &mtk_iommu_v1_identity_ops, +}; + +static void mtk_iommu_v1_set_platform_dma(struct device *dev) +{ + mtk_iommu_v1_identity_attach(&mtk_iommu_v1_identity_domain, dev); } static int mtk_iommu_v1_map(struct iommu_domain *domain, unsigned long iova, @@ -443,7 +459,7 @@ static int mtk_iommu_v1_create_mapping(struct device *dev, struct of_phandle_arg static int mtk_iommu_v1_def_domain_type(struct device *dev) { - return IOMMU_DOMAIN_UNMANAGED; + return IOMMU_DOMAIN_IDENTITY; } static struct iommu_device *mtk_iommu_v1_probe_device(struct device *dev) @@ -578,6 +594,7 @@ static int mtk_iommu_v1_hw_init(const struct mtk_iommu_v1_data *data) } static const struct iommu_ops mtk_iommu_v1_ops = { + .identity_domain = &mtk_iommu_v1_identity_domain, .domain_alloc = mtk_iommu_v1_domain_alloc, .probe_device = mtk_iommu_v1_probe_device, .probe_finalize = mtk_iommu_v1_probe_finalize,