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Thu, 24 Jul 2025 15:10:10 -0700 From: Nicolin Chen To: , CC: , , , , , , Subject: [PATCH v4 2/2] iommu/arm-smmu-v3: Replace vsmmu_size/type with get_viommu_size Date: Thu, 24 Jul 2025 15:10:02 -0700 Message-ID: <20250724221002.1883034-3-nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250724221002.1883034-1-nicolinc@nvidia.com> References: <20250724221002.1883034-1-nicolinc@nvidia.com> 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: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB50:EE_|DS5PPFEAC589ED8:EE_ X-MS-Office365-Filtering-Correlation-Id: 8469a568-855e-4e73-06b7-08ddcafee672 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700013|376014|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?/dPyslMOX+WsAmV2N2hFmkhq3anSpufpv9tiSgdPJ4lz4bZrYYp38pjHbSxC?= =?us-ascii?Q?LrpvAlz+TusUD+GVB2dX7V4ztaKoYaDn/MHA2LJPjjy6G6ErBb7CbH+lJZX8?= =?us-ascii?Q?Y/wo4oAt8DplO6xeFf4umXt0Fhc26vHrGuqHmwhtcFf8idBstLVYDcGuFfzN?= =?us-ascii?Q?R2RVIHDuSuJlbK8gyJhpuCe9yE/ktZ09OYJoIIr3aG+AdBvr2AgiDGQcz8es?= =?us-ascii?Q?Zk10sKK4r6CGBty+7Rm+JOLGBXOvWCFbQENEVwnJB016uFez98vtb6//++ET?= =?us-ascii?Q?HNG+t6DcqwU2AZTPkI0oTzvYZ8htliOgIbWh/YtzIAdJrox/RhG3gxn4KUid?= =?us-ascii?Q?vdt+73G/AiGtz8H984B0nEryhvhW7DA5X5bcEoRN74u5OHdDlXF1iSlvjh/z?= =?us-ascii?Q?chHmfr6lyAQYEJqTVJYkSoT5aUFZNcn/gw10CzMMTVjqx9trIlsnd2Zs0MEE?= =?us-ascii?Q?WF08Mc1ljAQUm7ZQKcPeLkYuZxWZbhP/vjKEJEWYHztztAAhkj9/YxUMoEw/?= =?us-ascii?Q?RqRQz69g2fwVS4Y7aomN5nRFPikyfoTogtpUSoYML3r0G4Kiy6rM0HIPBbBG?= =?us-ascii?Q?Ukdoc7MBIQTjzUXcLmjcnILVlUu1PovJtIPy+mP51ycEaBMK43877pvYG/Pe?= =?us-ascii?Q?amfvPxkIVHO2/2s2ykFIGIfM6gXK1Q8g0hW5kqcYf8iQjS6nYQvoZWos0eb8?= =?us-ascii?Q?cgCmIx3JhI4rM1mvSYPz6lwGFNY84GcRdf3mAoK56QwIXBpBcMd/BKAOvZBl?= =?us-ascii?Q?dXiuCZ7RlAE9Gq1OIJ3bA2b6LmR5Dl4W9lsOPsbTQFXRUqm71oTCOTlRfyI9?= =?us-ascii?Q?NSOfW/iE7Vr2E6O4+qQg6g4zZ3q9Zs8gA9jpq9k6h18jx/QvMvTNtYmqsa4q?= =?us-ascii?Q?MPyj61Fh42uQempd0z6AnYDQrE8eIqlBSe2R4lJaUG7ojfAhE5OnuIwN6xt6?= =?us-ascii?Q?VeT9+RK2X9ot16mbiaESiFqk5q8u/Szd92ZbW0gRQcV3Dr+Uaz95/7I4HfuB?= =?us-ascii?Q?TEySTuq/8i0ayykZ1+b0l2yZefAh6Ia1i3JJxzdN5JOaPqdXonOifgB7KWDQ?= =?us-ascii?Q?kpc8WScf7Ybx+Z96AiuragjtqGKd4dPNUoVmjGLuzaln2bG9M0LPBld0/EsS?= =?us-ascii?Q?mDQzidKraDWCZO/JELGNx2nvVH+4KoAGa7md7noynFpgmc8TGunyKgnF92iK?= =?us-ascii?Q?8cpSDV5ZteYm6BiRb1rS0ZzBy9UfWBu1M4W2QVrn3QidQsnxfriTzZJOqRZj?= =?us-ascii?Q?YNk1UalA6rYuNdm9xr3iP3WkvlJzzWUUt8j8Kdbu0tvgHGGjwlnsmKUjA2O/?= =?us-ascii?Q?jVceuE/EIxAP2bOEqqvCwX4ojLTXKduYZIn5NEN9Kc7RmO5wPj7UOcGSH64B?= =?us-ascii?Q?VLnZBiYiDVKN4sQ51XICZEWJvReEILHs/h7t5HNt2GsvvyjgltGS1Im4T6M6?= =?us-ascii?Q?RRZJ1ZISuju7qhDXt9VlTZp/gPtAyV7C6IUCjm7XaLYwmi3friEcJYhlxQuS?= =?us-ascii?Q?z1N1CdWJiya3sdOPbkp4PvH4LHZo/Rlf03KO?= 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)(1800799024)(82310400026)(36860700013)(376014)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jul 2025 22:10:29.1350 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8469a568-855e-4e73-06b7-08ddcafee672 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: BL6PEPF0001AB50.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS5PPFEAC589ED8 Content-Type: text/plain; charset="utf-8" It's more flexible to have a get_viommu_size op. Replace static vsmmu_size and vsmmu_type with that. Suggested-by: Will Deacon Acked-by: Will Deacon Reviewed-by: Pranjal Shrivastava Signed-off-by: Nicolin Chen --- .../iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 11 ++--------- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 ++-- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 3 +-- drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 17 +++++++++++++++-- 4 files changed, 20 insertions(+), 15 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c b/drivers/= iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c index b963b9b3de542..8cd8929bbfdf8 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c @@ -423,10 +423,9 @@ size_t arm_smmu_get_viommu_size(struct device *dev, if (viommu_type =3D=3D IOMMU_VIOMMU_TYPE_ARM_SMMUV3) return VIOMMU_STRUCT_SIZE(struct arm_vsmmu, core); =20 - if (!smmu->impl_ops || !smmu->impl_ops->vsmmu_size || - viommu_type !=3D smmu->impl_ops->vsmmu_type) + if (!smmu->impl_ops || !smmu->impl_ops->get_viommu_size) return 0; - return smmu->impl_ops->vsmmu_size; + return smmu->impl_ops->get_viommu_size(viommu_type); } =20 int arm_vsmmu_init(struct iommufd_viommu *viommu, @@ -451,12 +450,6 @@ int arm_vsmmu_init(struct iommufd_viommu *viommu, return 0; } =20 - /* - * Unsupported type should be rejected by arm_smmu_get_viommu_size. - * Seeing one here indicates a kernel bug or some data corruption. - */ - if (WARN_ON(viommu->type !=3D smmu->impl_ops->vsmmu_type)) - return -EOPNOTSUPP; return smmu->impl_ops->vsmmu_init(vsmmu, user_data); } =20 diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/ar= m/arm-smmu-v3/arm-smmu-v3.c index 9f4ad37058010..f56113107c8ad 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -4716,8 +4716,8 @@ static struct arm_smmu_device *arm_smmu_impl_probe(st= ruct arm_smmu_device *smmu) =20 ops =3D new_smmu->impl_ops; if (ops) { - /* vsmmu_size and vsmmu_init ops must be paired */ - if (WARN_ON(!ops->vsmmu_size !=3D !ops->vsmmu_init)) { + /* get_viommu_size and vsmmu_init ops must be paired */ + if (WARN_ON(!ops->get_viommu_size !=3D !ops->vsmmu_init)) { ret =3D -EINVAL; goto err_remove; } diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/ar= m/arm-smmu-v3/arm-smmu-v3.h index 3fa02c51df9f3..e332f5ba2f8a2 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -728,8 +728,7 @@ struct arm_smmu_impl_ops { */ void *(*hw_info)(struct arm_smmu_device *smmu, u32 *length, enum iommu_hw_info_type *type); - const size_t vsmmu_size; - const enum iommu_viommu_type vsmmu_type; + size_t (*get_viommu_size)(enum iommu_viommu_type viommu_type); int (*vsmmu_init)(struct arm_vsmmu *vsmmu, const struct iommu_user_data *user_data); }; diff --git a/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c b/drivers/iommu= /arm/arm-smmu-v3/tegra241-cmdqv.c index 4c86eacd36b16..be1aaaf8cd17c 100644 --- a/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c +++ b/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c @@ -832,6 +832,13 @@ static void *tegra241_cmdqv_hw_info(struct arm_smmu_de= vice *smmu, u32 *length, return info; } =20 +static size_t tegra241_cmdqv_get_vintf_size(enum iommu_viommu_type viommu_= type) +{ + if (viommu_type !=3D IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV) + return 0; + return VIOMMU_STRUCT_SIZE(struct tegra241_vintf, vsmmu.core); +} + static struct arm_smmu_impl_ops tegra241_cmdqv_impl_ops =3D { /* For in-kernel use */ .get_secondary_cmdq =3D tegra241_cmdqv_get_cmdq, @@ -839,8 +846,7 @@ static struct arm_smmu_impl_ops tegra241_cmdqv_impl_ops= =3D { .device_remove =3D tegra241_cmdqv_remove, /* For user-space use */ .hw_info =3D tegra241_cmdqv_hw_info, - .vsmmu_size =3D VIOMMU_STRUCT_SIZE(struct tegra241_vintf, vsmmu.core), - .vsmmu_type =3D IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV, + .get_viommu_size =3D tegra241_cmdqv_get_vintf_size, .vsmmu_init =3D tegra241_cmdqv_init_vintf_user, }; =20 @@ -1273,6 +1279,13 @@ tegra241_cmdqv_init_vintf_user(struct arm_vsmmu *vsm= mu, phys_addr_t page0_base; int ret; =20 + /* + * Unsupported type should be rejected by tegra241_cmdqv_get_vintf_size. + * Seeing one here indicates a kernel bug or some data corruption. + */ + if (WARN_ON(vsmmu->core.type !=3D IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV)) + return -EOPNOTSUPP; + if (!user_data) return -EINVAL; =20 --=20 2.43.0