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Sun, 12 Oct 2025 17:06:19 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v1 20/20] iommu/tegra-smmu: Implement tegra_smmu_domain_test_dev Date: Sun, 12 Oct 2025 17:05:17 -0700 Message-ID: <7c06a0d6165e69b7a8aac10e5b8aea45c8e020f1.1760312725.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: CY4PEPF0000EE3C:EE_|CY3PR12MB9704:EE_ X-MS-Office365-Filtering-Correlation-Id: d9bb0a35-4e89-446e-67cf-08de09ec5ce7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|7416014|376014|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Txk4NSskoZkwOYl3/X/f/kcpNc0ofUJHsse7PoIuysRxafHaNUojgxxNlF7c?= =?us-ascii?Q?htKLe+Fa1mH8bFcUxlUXB5J8AyFP7zbQJ7ygpP+IZ2+N7lvVz/F5bXynE4Hr?= =?us-ascii?Q?824tBTBNC1mVX/JMDnASOIF88uFA4O8g6Bz2/DwAxApRlsptZF+aqYmxT8JR?= =?us-ascii?Q?Lcvx5Itujv/h98L6gojKQ/ReWj7JXmAaBP6M73gx4PCcik76X7pNUGNLoqJy?= =?us-ascii?Q?xZYGjTHfouZU+M2OFlzM6Qv4qLFINhYlPiAHv0slDqfNNXx347UBVzaeecNd?= =?us-ascii?Q?JEE0OQPIgxmO2Ek9jtrsc1bY5qxRwBM+45rqzmxExhXiHHKgUlTOhb+vANlD?= =?us-ascii?Q?iuAJOf7Pg0CN1347+0oExp05rg6ie54BjiA90pjDx/VYKgWbY1HNEVkjfBrz?= =?us-ascii?Q?UQ5xen4xvD4N7YkAcCC8d8L/r2tN5FcadSc+2ry7eoKzIUwTQZJVXg2M71KE?= =?us-ascii?Q?o9Vxx5GGtxLWzddLboo8ZZVu8U7JGErcJP5LLevqrN/KPsIdGzxmKWnqyXwn?= =?us-ascii?Q?X14eiDrdccSXYmKDLYC5g86OtizZXXOvXPBZKpIZMyiFEVX6Q0UydSXNS1b6?= =?us-ascii?Q?q0RxCB6I+oc+kzh3V/klTxRBgi68zxrHyr+u1NSQLq0SxMNz9Z3dBisp1GqX?= =?us-ascii?Q?V39Tqu8PlC8JpZ3crpzfG+7iR1+hHludowJ6MTXk5ElQgcgYHw0Cl+e0jZp2?= =?us-ascii?Q?5EDjRcdQ/N+6Z1vNa+4lkfxKCvViIG2w1H4nCk+IZ5yEjLPvrxYlAx503/gy?= =?us-ascii?Q?5lmBkJMv8tdFCjhgkvFc+HIAg7BsyLS3FJT7iFmk/JtFuiY3X6vbD4uq9gy9?= =?us-ascii?Q?NFWU4e9sXRQV6bKjWaxiYRpB6u8/Ed1oypVHwQl4UvOcAEssq5Lk7BmOt6Ke?= =?us-ascii?Q?EcgHqAK33HZcegSPf4d08zisdyLf11L8cB706HjqJ1oEcKSd4VlnBHDuLE41?= =?us-ascii?Q?Kvw3JwcYuVkTk0W9I9f9vRaLe56V+MpDUqF7OiVLDnmVarqXY6FOe3e6jaNG?= =?us-ascii?Q?jcvVJkhjMBVAhoUe6WjA8hx9c3zyPIcgBV3H7qJeLs/5Hdujv0TpU5oJSbTp?= =?us-ascii?Q?BQWJZbTrtRQHTlHjs6czUOBHq4kJD1fza59sd1amo6dpA91cKVPL3WBKBswi?= =?us-ascii?Q?B2R0qE/0v/DwFoum9H+6lrozqb4P+4ybhqiKqf95aXSbYJmBxgHd8MhlakVi?= =?us-ascii?Q?9UNEexPMW8GiDF8v8fmXKzC/Nn6rgPzfH68G2W0eKBrOfqS6ac2s1iDRE1aw?= =?us-ascii?Q?pXOiCMumRM0P+txGGJbEsIz3iFXsG2tKAXPJEZRCZsQZqLT4ivI/fk8pOQdf?= =?us-ascii?Q?PhVI6AEDacVVsM+apcA9iK2osA5BId+UT/IulctHGyO+xPvd3pM+rm+7H42Q?= =?us-ascii?Q?sAf5sbyDYgq19WioflLb5aGgqCKSeMeMi/wF9A3UfzfWqmT0B0W2iZU9w/oi?= =?us-ascii?Q?hLxjJfVOgjS5mpCk8iCKD9nbZ+1/zqpBXQPIwCv7gtXakg95tvmvBBN0w8B8?= =?us-ascii?Q?eSypBK8aB+9hfT3gpFmIkrllTY4qd1zj7AKRqMOE3C4y/b7SyiDgZ16YKhdD?= =?us-ascii?Q?qcQthlTwRe40bG25Gsc=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)(82310400026)(7416014)(376014)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2025 00:06:30.8053 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d9bb0a35-4e89-446e-67cf-08de09ec5ce7 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: CY4PEPF0000EE3C.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY3PR12MB9704 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/tegra-smmu.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 336e0a3ff41fb..cfbe67678a426 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -489,6 +489,18 @@ static void tegra_smmu_as_unprepare(struct tegra_smmu = *smmu, mutex_unlock(&smmu->lock); } =20 +static int tegra_smmu_domain_test_dev(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid, + struct iommu_domain *old) +{ + struct iommu_fwspec *fwspec =3D dev_iommu_fwspec_get(dev); + + if (!fwspec || !fwspec->num_ids) + return -ENOENT; + + return 0; +} + static int tegra_smmu_attach_dev(struct iommu_domain *domain, struct device *dev, struct iommu_domain *old) { @@ -498,9 +510,6 @@ static int tegra_smmu_attach_dev(struct iommu_domain *d= omain, unsigned int index; int err; =20 - if (!fwspec) - return -ENOENT; - for (index =3D 0; index < fwspec->num_ids; index++) { err =3D tegra_smmu_as_prepare(smmu, as); if (err) @@ -509,9 +518,6 @@ static int tegra_smmu_attach_dev(struct iommu_domain *d= omain, tegra_smmu_enable(smmu, fwspec->ids[index], as->id); } =20 - if (index =3D=3D 0) - return -ENODEV; - return 0; =20 disable: @@ -532,9 +538,6 @@ static int tegra_smmu_identity_attach(struct iommu_doma= in *identity_domain, struct tegra_smmu *smmu; unsigned int index; =20 - if (!fwspec) - return -ENODEV; - if (old =3D=3D identity_domain || !old) return 0; =20 @@ -548,6 +551,7 @@ static int tegra_smmu_identity_attach(struct iommu_doma= in *identity_domain, } =20 static struct iommu_domain_ops tegra_smmu_identity_ops =3D { + .test_dev =3D tegra_smmu_domain_test_dev, .attach_dev =3D tegra_smmu_identity_attach, }; =20 @@ -1005,6 +1009,7 @@ static const struct iommu_ops tegra_smmu_ops =3D { .device_group =3D tegra_smmu_device_group, .of_xlate =3D tegra_smmu_of_xlate, .default_domain_ops =3D &(const struct iommu_domain_ops) { + .test_dev =3D tegra_smmu_domain_test_dev, .attach_dev =3D tegra_smmu_attach_dev, .map_pages =3D tegra_smmu_map, .unmap_pages =3D tegra_smmu_unmap, --=20 2.43.0