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Sun, 12 Oct 2025 17:05:50 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v1 09/20] iommu/mkt_iommu: Implement mtk_iommu_test_device Date: Sun, 12 Oct 2025 17:05:06 -0700 Message-ID: <42368f4fb509f19681681cbc41e5ef1d2b320437.1760312725.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 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: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF00021F6B:EE_|MN6PR12MB8567:EE_ X-MS-Office365-Filtering-Correlation-Id: 3ed24eb3-349b-47dd-6a46-08de09ec4df3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|36860700013|1800799024|82310400026|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?q9zldhU6rWmBVtb01h7e6yKmmFmVYjUMMcKQ6m5sYMgLVDz2jaoMWBYPQz0d?= =?us-ascii?Q?DWHWWz8xXaCBgFYws/butmCEbDhEa7J5QFYLqQymeo+KMMxNVU9xvRNNTbya?= =?us-ascii?Q?T8aq724TVZzJ+vZk+apWwKN7XA/RGU7twx3UYlDkH1fv1goc16QCgfCCeKEL?= =?us-ascii?Q?O4nqd97VxXLaP7aaMYi1Hr0pcj8DVSB42qbw+beJV4Y+XGMhkHEQTLkKR1GV?= =?us-ascii?Q?IqPwJxeBUceedn1RnWkwrz8htl4LMveD74ZSy9viun5PXCIjQpf25WDOITre?= =?us-ascii?Q?/EEJ9mSfypFe/AILEWaA7/OS02oCgJjoWQD4NQT2SEIdJ9qxjRsNGsWW1pzq?= =?us-ascii?Q?8xqmsYyzI3oo1MQyhkeU3o2f/ICZv2j21xrLEKCWZcfGLYx+glpeZnFYLXtb?= =?us-ascii?Q?15TNSxAZFLSE0z1X+I9Jn0Kkp1qJetv9DLR6AI7ket2hD1iAqDMA+5RAAuE3?= =?us-ascii?Q?jZD45l5Xz+Vc/KUQmrodem6YyJnOeAOm8WlbqpzJYJ249STVBjib/4S8pAJY?= =?us-ascii?Q?mtaYkNFRPugfAkowSUOy7jU4JFHuJz4eF1MJrlexNYIFwqmvVwj/RMLOT/Bt?= =?us-ascii?Q?yEH0UdgvVwgT1qJp+p2o5x/ArmhpWIVBQxUBRxu5qnIX/PzV/0o3lyG0n/o0?= =?us-ascii?Q?tHaiyFlxSSW5EED9PWXNcNwfo0NqfY5L7/hrvfF6XFXyeUMqb3/6FplicaMY?= =?us-ascii?Q?6nG43AO2FtBGkAuuDBDIyUZUItn3U++ho4E5Y/k5iJCr5XhlrpRZaG8Xe4AH?= =?us-ascii?Q?DjRwL+00qntxZpvbyO+5Kf0pyD4FI4XfnSl/f8Wx54MvDZCVgZhDu6iuhRr1?= =?us-ascii?Q?DDIczvDaYhrw1EWQNScAtL98UTsqp2QRCYGtgGKwbt7umLJoGTU0f4CWlp44?= =?us-ascii?Q?o3uqKfOn/cfBZH6pWRlQ+eG214Kn6W+zVLnFiajAF8dOl7zvkXho4E0yYchU?= =?us-ascii?Q?Ia3dGrUt5e426UMQSzWe1LU6VjxNuUQTbuY4FKRIhTxNfKj0LYMSoOX8Y3cN?= =?us-ascii?Q?8eiHElvAtNDtqyq1wJ9oWt3+4pbC3QCd9sPxABVuzGh1AG2FoSAhl9fHsDxm?= =?us-ascii?Q?xtNb+6VqsRurboMLskrkhQTNPK+LPahg5ECzHuh0x3KVQjGTNsdXpb4swWaX?= =?us-ascii?Q?N6JyEuwAeopllaZm9jGir/8/4QtNFXGT0JW7V4u48pM8VSWYtiLzDtB5wJs8?= =?us-ascii?Q?oTA6SKCtEuWgduMTu23z4R0TS4yjPQ70ysC4CyfzZxscDRFS3P8zvFa4/9Jz?= =?us-ascii?Q?jit2k/g6U45cLKCZqT95zIEykq7Bs15x2IjfjJN5MF8xdUUJeK4fYMkJQlt8?= =?us-ascii?Q?tAtd/tWOtGGZb3HloOodlEa/Hl1TyKoNlqI0vSyBa/RLwZAk53SzQ0b6GeO/?= =?us-ascii?Q?y8Ypq5ZEX9U35pS54y4i6OzDXWji37yH2X55/vMcnIiPWaX/j7rM7ZjNlBl1?= =?us-ascii?Q?RkURI6KG16om1KtUYzdyCFIbseZF6WUHJVOUTRssbKVz5xEDYOVSBCxi2T+2?= =?us-ascii?Q?rU7UD+Csjk1beBv73ZrLJDXg/s79yoVZ0cIP61nEkL7ZESvPpvbBmXeUTSCm?= =?us-ascii?Q?8FS1FYnft4S/PRM0dRk=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(7416014)(36860700013)(1800799024)(82310400026)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2025 00:06:05.6446 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3ed24eb3-349b-47dd-6a46-08de09ec4df3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF00021F6B.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN6PR12MB8567 Content-Type: text/plain; charset="utf-8" Move sanity and compatibility tests from the attach_dev callback to the new test_dev callback function. The IOMMU core makes sure an attach_dev call must be invoked after a successful test_dev call. Signed-off-by: Nicolin Chen --- drivers/iommu/mtk_iommu.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 9747ef1644138..0cfcd0d08ae64 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -704,6 +704,20 @@ static void mtk_iommu_domain_free(struct iommu_domain = *domain) kfree(to_mtk_domain(domain)); } =20 +static int mtk_iommu_test_device(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid, + struct iommu_domain *old) +{ + struct mtk_iommu_data *data =3D dev_iommu_priv_get(dev); + int region_id; + + region_id =3D mtk_iommu_get_iova_region_id(dev, data->plat_data); + if (region_id < 0) + return region_id; + + return 0; +} + static int mtk_iommu_attach_device(struct iommu_domain *domain, struct device *dev, struct iommu_domain *old) { @@ -716,8 +730,6 @@ static int mtk_iommu_attach_device(struct iommu_domain = *domain, int ret, region_id; =20 region_id =3D mtk_iommu_get_iova_region_id(dev, data->plat_data); - if (region_id < 0) - return region_id; =20 bankid =3D mtk_iommu_get_bank_id(dev, data->plat_data); mutex_lock(&dom->mutex); @@ -1019,6 +1031,7 @@ static const struct iommu_ops mtk_iommu_ops =3D { .get_resv_regions =3D mtk_iommu_get_resv_regions, .owner =3D THIS_MODULE, .default_domain_ops =3D &(const struct iommu_domain_ops) { + .test_dev =3D mtk_iommu_test_device, .attach_dev =3D mtk_iommu_attach_device, .map_pages =3D mtk_iommu_map, .unmap_pages =3D mtk_iommu_unmap, --=20 2.43.0