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Thu, 8 May 2025 20:03:49 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v4 23/23] iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support Date: Thu, 8 May 2025 20:02:44 -0700 Message-ID: <52a7150bcc0fa8bfad9e84bd0021ef4493586471.1746757630.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF00004FBC:EE_|CY8PR12MB7436:EE_ X-MS-Office365-Filtering-Correlation-Id: 6244ae48-5d16-442b-c40f-08dd8ea6269b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|7416014|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?T22NuBDIoh3Nd+OrF3LgF+xu15ld2qTDjHXEIUva9N7Owl84JdRetiRy/7ZM?= =?us-ascii?Q?wxiaghpSpKLooBzDKCU0WWpBY6t5SHfksVowwxOA7qtNZn9BFhZ8mOXZ/HaX?= =?us-ascii?Q?iZSuAuD8qElgyCkgWeWeg8ExunCz1Q59vT1WIoYO+4CdEPP5IeHSBzXvaXjL?= =?us-ascii?Q?qXfpIBwVcEVxA4t6WFMCa4MUNLQYVDCTfA7HZ2XPu1CDBUyEWB/cokSrech1?= =?us-ascii?Q?pF7kI1zGYqxYF4EQKzGnbjtc0gkkEht55HOum/pECECHZ8X0VEFtcxKPagIx?= =?us-ascii?Q?S9PlLDofjvq0VnX9OEwQJVQ9JHCuxI7AZ/kzYw17M79b8ApsnkNpBR0XbAH7?= =?us-ascii?Q?VKSsAmAM6x6vE1870k8X/iAMht3GpKd7jU3M1n/Yji91TolzF2mPg8/to97f?= =?us-ascii?Q?eDwlUMtyaWbGLejor4CbvnCyZHqezttgbsGJnSjkOsGazV7F/xxqoEXz/aZk?= =?us-ascii?Q?MyN6Ma40+qv90n7TSGhMtTJ/fDxts4RKxwACYhmzcYJYul53uWMadXyVteky?= =?us-ascii?Q?YA+NfRt2AsihFS/2vtKr+oEO3WA9S915RCcvbvAWB5Z747xzz0lKJlQRYjOm?= =?us-ascii?Q?OIcgLK4qjZFnE9hMacX6vTYDVjvR07aA6yvckvNecXVtbEjNbEG88MtcyHOs?= =?us-ascii?Q?MJCUNmYnZ8KAZ5AqnR9z7rchYUWOkHWT+UFl8HQtFvDiDnBtvHdDVwZymCZX?= =?us-ascii?Q?RUlbOh4YP2OhoSwloxkfJUyXXdb7HR6IzDZjewFI/xRJrqratSAxEmUZDXKS?= =?us-ascii?Q?7bX6//YUhY7+VMalr3LNH7P+7U2LDIbj7E4nNX/b9y4mSLKD8BiqG7cvfD01?= =?us-ascii?Q?b8W7ANYqZkaqZOpsswTTknpX05lWnwHZfZ5wG24exhBYPR3NGVy6b41D7obA?= =?us-ascii?Q?DdSPtAKGxUITMjt2oUJa3+veU7u/JCnDvjLaq8y7ciO9qv8ORiyCjsOTaZGM?= =?us-ascii?Q?4Y3Rs4tt/Umh6GgEm9sFP7+u/JA9J53KM706YtYjZ0zfMVqwMU/WLtMwTFM7?= =?us-ascii?Q?KiKK66TKCT7u6P4TA/Rqc4h6gSXjI2S3Bm0Ql0Y8PXLd4aRBhBgGcvy6hOFE?= =?us-ascii?Q?f2bEsyuF7g/q7ZE0YBMPt3PGIsgidrhO0h08pNSHjOh6LvE9YVECc9TLFt/V?= =?us-ascii?Q?gUqKMedx6raZzeJ3zMYbuc+vwK8oJcBsVXw6ifC9N4OGzFhNWjcpGZkc1He9?= =?us-ascii?Q?/LtZy6JRfxTwshFUhAY3pugz3ZNsUW++7g2JDJuNcY4gcVAoNxIYzfVgxSZ9?= =?us-ascii?Q?g2yJliFVQGnwFjWZJtyGZQEZd2ZjL2ptD5uaqzoPJs5yKiRWZAr2hNT4GYpt?= =?us-ascii?Q?n+kltg5/KeHa3kz7fAPD9g2BjpW6HTlR+7BqeyrM8JKHkuvMAAn6cEs0WMmv?= =?us-ascii?Q?5QPxrnJs6r9yXu1Yc0hDmcpwQ0RWgD8DhIZp1hfMpY8C+OV4I9pdzzD6tcvq?= =?us-ascii?Q?sqNousa9xJcYkdrVOUpXvQhtOSQ0KB8z3MFZYthf3LEwNbMOQSLqIFaKvbH2?= =?us-ascii?Q?OB4BgqpZ7VjAL7yb7c8AepHNY5zkceOGom74?= X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(1800799024)(7416014)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 May 2025 03:04:01.8015 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6244ae48-5d16-442b-c40f-08dd8ea6269b X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF00004FBC.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7436 Add a new vEVENTQ type for VINTFs that are assigned to the user space. Simply report the two 64-bit LVCMDQ_ERR_MAPs register values. Reviewed-by: Alok Tiwari Reviewed-by: Pranjal Shrivastava Signed-off-by: Nicolin Chen --- include/uapi/linux/iommufd.h | 15 +++++++++++++ .../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 22 +++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index a8a97f43ecc4..b566f12d99f3 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -1114,10 +1114,12 @@ struct iommufd_vevent_header { * enum iommu_veventq_type - Virtual Event Queue Type * @IOMMU_VEVENTQ_TYPE_DEFAULT: Reserved for future use * @IOMMU_VEVENTQ_TYPE_ARM_SMMUV3: ARM SMMUv3 Virtual Event Queue + * @IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV: NVIDIA Tegra241 CMDQV Extension IRQ */ enum iommu_veventq_type { IOMMU_VEVENTQ_TYPE_DEFAULT = 0, IOMMU_VEVENTQ_TYPE_ARM_SMMUV3 = 1, + IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV = 2, }; /** @@ -1141,6 +1143,19 @@ struct iommu_vevent_arm_smmuv3 { __aligned_le64 evt[4]; }; +/** + * struct iommu_vevent_tegra241_cmdqv - Tegra241 CMDQV IRQ + * (IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV) + * @lvcmdq_err_map: 128-bit logical vcmdq error map, little-endian. + * (Refer to register LVCMDQ_ERR_MAPs per VINTF ) + * + * The 128-bit register value from HW exclusively reflect the error bits for a + * Virtual Interface represented by a vIOMMU object. Read and report directly. + */ +struct iommu_vevent_tegra241_cmdqv { + __aligned_le64 lvcmdq_err_map[2]; +}; + /** * struct iommu_veventq_alloc - ioctl(IOMMU_VEVENTQ_ALLOC) * @size: sizeof(struct iommu_veventq_alloc) diff --git a/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c b/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c index 4f3ecc265d6f..ba0aed82fece 100644 --- a/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c +++ b/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c @@ -292,6 +292,20 @@ static inline int vcmdq_write_config(struct tegra241_vcmdq *vcmdq, u32 regval) /* ISR Functions */ +static void tegra241_vintf_user_handle_error(struct tegra241_vintf *vintf) +{ + struct iommufd_viommu *viommu = &vintf->vsmmu.core; + struct iommu_vevent_tegra241_cmdqv vevent_data; + int i; + + for (i = 0; i < LVCMDQ_ERR_MAP_NUM_64; i++) + vevent_data.lvcmdq_err_map[i] = + readq_relaxed(REG_VINTF(vintf, LVCMDQ_ERR_MAP_64(i))); + + iommufd_viommu_report_event(viommu, IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV, + &vevent_data, sizeof(vevent_data)); +} + static void tegra241_vintf0_handle_error(struct tegra241_vintf *vintf) { int i; @@ -337,6 +351,14 @@ static irqreturn_t tegra241_cmdqv_isr(int irq, void *devid) vintf_map &= ~BIT_ULL(0); } + /* Handle other user VINTFs and their LVCMDQs */ + while (vintf_map) { + unsigned long idx = __ffs64(vintf_map); + + tegra241_vintf_user_handle_error(cmdqv->vintfs[idx]); + vintf_map &= ~BIT_ULL(idx); + } + return IRQ_HANDLED; } -- 2.43.0