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Sun, 12 Oct 2025 17:06:05 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v1 15/20] iommu/fsl_pamu_domain: Implement fsl_pamu_domain_test_device Date: Sun, 12 Oct 2025 17:05:12 -0700 Message-ID: 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: CY4PEPF0000EE3B:EE_|SA0PR12MB4383:EE_ X-MS-Office365-Filtering-Correlation-Id: 648676e8-fa86-4032-ba1c-08de09ec5787 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700013|376014|7416014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?cjKGuBkhvATy7P5wvlyqpU+4kWPsr++cvALZcrMgzZFimlnwyZAoFf7DoVU1?= =?us-ascii?Q?n9WKfJ+5VYrquRHxkubNTRmPXX3d3zLgSFq4HJToRc8+gYIwZ4R2MDY9qgtW?= =?us-ascii?Q?RbHZLIHFrNEH0filGdROHzuebd3IPj4CteKKu6HrBWlQUOXFOyrttXqvS78Y?= =?us-ascii?Q?Z4VuexamY2f5z9X7bZeDSpyuocDebAS/bKVknqsHceDHl+GCgjht0AGEAeAp?= =?us-ascii?Q?7bqbOdq8SKCuQuHPtpNcvk0vSTZh+W3bnJX+TRO3rKP53OQyPPdUq7A/orYF?= =?us-ascii?Q?glCvvjGr6xI6XlzhKOFRhEtBjHUEIRyUIrGz0DR+FVJ9nUQH6zjZ7XhVikz+?= =?us-ascii?Q?oieZ/USCvMMzbRKE4GkX3LT2OSgCz6Rv1nYHMfWHLV73qMAd1xu/2VDNwGBh?= =?us-ascii?Q?w/iTuqvplwcTJRWc91yjT0qHT+98ro8ySCDF8F2epV/8Qz8V7rff2gJFiLm2?= =?us-ascii?Q?ROeY8MrdozaOBJrzUnvi2ElmLwWzh3+cXbPS9CU05TikLidRtDuDtVyaD6qQ?= =?us-ascii?Q?jgLMoF4P2HHTpZ72Yo9Hg441jGSCqNiCUA64pgSwugqLZKhsXMbg0E1m/AjL?= =?us-ascii?Q?/aq/5QMacmv4COEkdFeUozKRKMaTbpDKxO7i61kS79Ub0Nhs8HizQcddC8YJ?= =?us-ascii?Q?ymezPHGTYo0V39cbdnYPH5x6dHGGYdSfWMiggnFjD7YQECeRU25e71EAZrsA?= =?us-ascii?Q?okaeBCSz7lmNmgy7EKiw8O7erFwUX3A+vGW65tYUcN8jmlgjOC3Z+YjXqUzt?= =?us-ascii?Q?ztZ0jPEQNvieaviggQsSHY/GJnexdxaSfdkZohRdvtjtEa5QKc+//Ixwec5z?= =?us-ascii?Q?9dfnRzU2Tw/Vz5uRPYCO8WqCpvtE3PXHTAXKTx5uL8hxtaWiJ2OsyIwnysIo?= =?us-ascii?Q?6nMdSPPflOqIZ7tJ1IE/P0NLpPzIMHAYupGeFe/onUkKSH3yrzPIhif84WAk?= =?us-ascii?Q?xDyqOXtV2GIS0j4Pj7Cs/ThUJGlfuiGFo2esz2Z3TrUJiwhlalvsP4xlsWZ3?= =?us-ascii?Q?adcbIm9YZJQcxPSgNf8w5LwgEzeUfMwt519DbwgefB+1fwBDfaIYP0A9Jjxq?= =?us-ascii?Q?c4yoG/Cm7JmDy+OhevmBynLv3uiVA7WjENz6kVTykXfwu0RrLNKCYTEVCel+?= =?us-ascii?Q?RXuykEB125StESaw5ISxA7nkG+3axua1KK/odVa7WY9qo+B7imnW4u2AhRBO?= =?us-ascii?Q?B4PESwZ52u9ZUk291nDrAv93bVS9jyo7Pi3mVi8ReL6lilbm175ZdwQFqEk8?= =?us-ascii?Q?aZFCI0pu1czQBW3vP9akmPrN3wnlGV54lpkjdFn/3YMo2r5XyUqYQSf5fWSt?= =?us-ascii?Q?p2xQCmyd+rfzIu4Rv9HaSwp/FhnUZZzPviBj4dIkwbN1UcAwu0XU2dK4O1zM?= =?us-ascii?Q?+oC5hxqXJUBYeUHlbB1koPiw6ylT8RJVpKtFI3B00coxLeF3UQ1hJSo+uJP8?= =?us-ascii?Q?X+WdLwZ1x8jWhzV0eC2NAj6TFsd4OR8zyIZzvXnKxZoIlqpln5lXNDCH4iv/?= =?us-ascii?Q?XynDHplYZKI6sqARh8GZ2gRejhmupITntoarT9R1sKMQlWRjQ+PLjG5Q0y1e?= =?us-ascii?Q?f9aMZ1I4Wuy69dqgyks=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(82310400026)(36860700013)(376014)(7416014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2025 00:06:21.7879 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 648676e8-fa86-4032-ba1c-08de09ec5787 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE3B.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4383 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/fsl_pamu_domain.c | 50 +++++++++++++++++++++++++-------- 1 file changed, 38 insertions(+), 12 deletions(-) diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domai= n.c index 9664ef9840d2c..fbdaa74936394 100644 --- a/drivers/iommu/fsl_pamu_domain.c +++ b/drivers/iommu/fsl_pamu_domain.c @@ -237,6 +237,43 @@ static int update_domain_stash(struct fsl_dma_domain *= dma_domain, u32 val) return ret; } =20 +static int fsl_pamu_domain_test_device(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid, + struct iommu_domain *old) +{ + struct fsl_dma_domain *dma_domain =3D to_fsl_dma_domain(domain); + const u32 *liodn; + int len, i; + + /* Use LIODN of the PCI controller while attaching a PCI device. */ + if (dev_is_pci(dev)) { + /* + * make dev point to pci controller device so we can get the + * LIODN programmed by u-boot. + */ + dev =3D pci_bus_to_host(to_pci_dev(dev)->bus)->parent; + } + + liodn =3D of_get_property(dev->of_node, "fsl,liodn", &len); + if (!liodn) { + pr_debug("missing fsl,liodn property at %pOF\n", dev->of_node); + return -ENODEV; + } + + guard(spin_lock_irqsave)(&dma_domain->domain_lock); + + for (i =3D 0; i < len / sizeof(u32); i++) { + /* Ensure that LIODN value is valid */ + if (liodn[i] < PAACE_NUMBER_ENTRIES) + continue; + pr_debug("Invalid liodn %d, attach device failed for %pOF\n", + liodn[i], dev->of_node); + return -ENODEV; + } + + return 0; +} + static int fsl_pamu_attach_device(struct iommu_domain *domain, struct device *dev, struct iommu_domain *old) { @@ -263,21 +300,9 @@ static int fsl_pamu_attach_device(struct iommu_domain = *domain, } =20 liodn =3D of_get_property(dev->of_node, "fsl,liodn", &len); - if (!liodn) { - pr_debug("missing fsl,liodn property at %pOF\n", dev->of_node); - return -ENODEV; - } =20 spin_lock_irqsave(&dma_domain->domain_lock, flags); for (i =3D 0; i < len / sizeof(u32); i++) { - /* Ensure that LIODN value is valid */ - if (liodn[i] >=3D PAACE_NUMBER_ENTRIES) { - pr_debug("Invalid liodn %d, attach device failed for %pOF\n", - liodn[i], dev->of_node); - ret =3D -ENODEV; - break; - } - attach_device(dma_domain, liodn[i], dev); ret =3D pamu_set_liodn(dma_domain, dev, liodn[i]); if (ret) @@ -434,6 +459,7 @@ static const struct iommu_ops fsl_pamu_ops =3D { .probe_device =3D fsl_pamu_probe_device, .device_group =3D fsl_pamu_device_group, .default_domain_ops =3D &(const struct iommu_domain_ops) { + .test_dev =3D fsl_pamu_domain_test_device, .attach_dev =3D fsl_pamu_attach_device, .iova_to_phys =3D fsl_pamu_iova_to_phys, .free =3D fsl_pamu_domain_free, --=20 2.43.0