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Mon, 21 Jul 2025 13:04:56 -0700 From: Nicolin Chen To: , CC: , , , , , Subject: [PATCH v3 2/2] iommu/arm-smmu-v3: Replace vsmmu_size/type with get_viommu_size Date: Mon, 21 Jul 2025 13:04:44 -0700 Message-ID: <20250721200444.1740461-3-nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250721200444.1740461-1-nicolinc@nvidia.com> References: <20250721200444.1740461-1-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: SJ1PEPF00001CE4:EE_|LV2PR12MB5750:EE_ X-MS-Office365-Filtering-Correlation-Id: f96cc8f0-2a41-4174-798a-08ddc891e66e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|1800799024|36860700013|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?OG7FuAT++5NL4JRu3q41nYY2cqRJS2yotxdxcqVH7uYqtpAV02AioIPbF81C?= =?us-ascii?Q?tfI8OzOhauUF2/yUN9hr7g1XKKDJbCc7yw+Ktg+VRSzazhEmHGagjMp1vucx?= =?us-ascii?Q?PF8OcWtZMR3WKuJ9fbgo2G38q7K8PcVSXv0QmS062gleXfEp/BTlkGoiDaix?= =?us-ascii?Q?FM6Y4O0Sikw/s30S3r9nSJX/hlz0DTfCO9KNC8BLTZ3rtbNFVayBSS6fDLIK?= =?us-ascii?Q?koS/9q+pjRdaXtSehW882DYK+7XT6zSl0d/INuoCumbkXgjVxN0y8SVTHrUJ?= =?us-ascii?Q?ik6Gisp0GL9nJMPHxlzi/zDHSAb6Zq6X3yBAmwrFVdCy7ZwlLpuVhCt3bVnC?= =?us-ascii?Q?Gn55C9s9NEmNt54+i79Ze2W8Ymf7dyE8FqtaalcG3VEX4vcd0HHmMlA+yvPk?= =?us-ascii?Q?OtuGUnQIfHt9FNeniCn8hVLZ0JfI38FjDE7eiifZUcn9LSr5woPYdHCSQ9oa?= =?us-ascii?Q?DIGZ4B4taCVW6ZDTZYjr7EBJsfTZVNzQvA7U1KuHm69f1RUKXRaipnyLZi5R?= =?us-ascii?Q?Wc1a+kEOp+m7ORyXBXTeH75rqcGyD0VOLfAFumaj+v4FdO5jEDU02koYl4yb?= =?us-ascii?Q?7PqjsnHn5Sa5G6FGLaZc1VwzY97ys1RD1F40pTRTOqUVniA3jZiCHE4cqhIE?= =?us-ascii?Q?fYGLFacLticr4H+CvjiseOIOnOnriDxoLSKLhWyNAoxQUQW4w4PhsQodu+Sx?= =?us-ascii?Q?9/bHN4w+Z9PQmj2cNdja3DzG1UOX9dYyR45pRUm9rf9IFSO0vIWKNTNBpDWh?= =?us-ascii?Q?i14MJtp2qYlKoVdkCguAYRsXm7FHYClzJwDfhjp7AjsKTSVbS0VREeR9TyV/?= =?us-ascii?Q?j4glRxjsSv1CuAglh0MR3gM23wSfGw6OhMFbs0KExkSAVoTmvnyQeF71WFHW?= =?us-ascii?Q?zxCAbSVnMTNaT6qlUfXG8KYeCOi9+5uhkcptYbM4Q+0A6hJxQZcV1Yx6qWNK?= =?us-ascii?Q?+zZzi1bkI/mIW7gcqSdrr0/wsKqvT/4Xbl/C7JGRWpO6C0/nsOSxbWdYdmjB?= =?us-ascii?Q?8SfgkxswGVopJSs/xeDosQ/POJr7yXOBXSAhbu2j9/y2ByrRH0SLcC7aWQle?= =?us-ascii?Q?qA+2otjJeYWRjO0zt8e7CuRPwDS/8VxpIChQuFTCxyi4KSzXCnG2Fr/C4wRy?= =?us-ascii?Q?NJNkeCB1CTAX9HdikWxX8DAkGOC4rbhXt5UZlA3vtqxu4sy3zSP0MBa2zWK3?= =?us-ascii?Q?hpp6DF6LHHMwvleVyUIVKzIiKM4BPBdRPa6vjWRV7ygq3nSuXF2ShxBwvnF5?= =?us-ascii?Q?+5EkLNtVfb2buSYY1BHHlAnyb7Tio/VW2+fWcBPkJD+5CEf09HgRDErRUlY1?= =?us-ascii?Q?SJdSSSHehs0GtFdaqkQjtNFc3VNeZrWuDVu9DCFVrHD0+Vbh8IYkxxelIDEm?= =?us-ascii?Q?nYOSB9a+apRV9ppqptbp0/AxCpJIHMIPuGBdmGM/qdrV6hBwaY9rTMOnfSFx?= =?us-ascii?Q?eJE/uT3vw4mGofmy+SbXOlZvoAXGckKYwWf7U8r+aX9xJFtt6Zd0hY72xKWC?= =?us-ascii?Q?3RbJACl1fwjPyZkagv9/6T8yGQd3d0bf+wPq?= X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(82310400026)(1800799024)(36860700013)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jul 2025 20:05:11.7941 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f96cc8f0-2a41-4174-798a-08ddc891e66e X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CE4.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR12MB5750 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 Signed-off-by: Nicolin Chen Reviewed-by: Pranjal Shrivastava --- .../iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 8 ++------ 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 | 14 ++++++++++++-- 4 files changed, 17 insertions(+), 12 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 c034d6c5468f..8cd8929bbfdf 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, @@ -451,9 +450,6 @@ int arm_vsmmu_init(struct iommufd_viommu *viommu, return 0; } =20 - /* Unsupported type was rejected in arm_smmu_get_viommu_size() */ - 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 9f4ad3705801..f56113107c8a 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 3fa02c51df9f..e332f5ba2f8a 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 4c86eacd36b1..46005ed52bc2 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 +1279,10 @@ tegra241_cmdqv_init_vintf_user(struct arm_vsmmu *vsm= mu, phys_addr_t page0_base; int ret; =20 + /* Unsupported type was rejected in tegra241_cmdqv_get_vintf_size() */ + if (WARN_ON(vsmmu->core.type !=3D IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV)) + return -EOPNOTSUPP; + if (!user_data) return -EINVAL; =20 --=20 2.43.0