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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Received: from SATLEXMB03.amd.com (165.204.84.17) by CO1NAM11FT089.mail.protection.outlook.com (10.13.175.179) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6319.25 via Frontend Transport; Fri, 21 Apr 2023 14:54:29 +0000 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Fri, 21 Apr 2023 09:54:28 -0500 Received: from xhdipdslab41.xilinx.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2375.34 via Frontend Transport; Fri, 21 Apr 2023 09:54:26 -0500 From: Nipun Gupta To: , , , CC: , , Nipun Gupta Subject: [PATCH v3 2/5] bus/cdx: add DMA map and unmap support Date: Fri, 21 Apr 2023 20:24:03 +0530 Message-ID: <20230421145406.12831-3-nipun.gupta@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230421145406.12831-1-nipun.gupta@amd.com> References: <20230124140746.594066-1-nipun.gupta@amd.com> <20230421145406.12831-1-nipun.gupta@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT089:EE_|DS0PR12MB6438:EE_ X-MS-Office365-Filtering-Correlation-Id: ec98c711-8e30-47e7-4526-08db42784f66 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Apr 2023 14:54:29.7262 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ec98c711-8e30-47e7-4526-08db42784f66 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT089.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB6438 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org CDX bus can use VFIO interface for mapping and unmapping of DMA addresses in the IOMMU. This change adds the callback support for map and unmap APIs as well as fetching the IOMMU class. Signed-off-by: Nipun Gupta --- drivers/bus/cdx/cdx.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/bus/cdx/cdx.c b/drivers/bus/cdx/cdx.c index d479daa315..8cc273336e 100644 --- a/drivers/bus/cdx/cdx.c +++ b/drivers/bus/cdx/cdx.c @@ -505,12 +505,52 @@ cdx_find_device(const struct rte_device *start, rte_dev_cmp_t cmp, return NULL; } +static int +cdx_dma_map(struct rte_device *dev, void *addr, uint64_t iova, size_t len) +{ + struct rte_cdx_device *cdx_dev = RTE_DEV_TO_CDX_DEV(dev); + + if (!cdx_dev) { + rte_errno = EINVAL; + return -1; + } + + return rte_vfio_container_dma_map(RTE_VFIO_DEFAULT_CONTAINER_FD, + (uintptr_t)addr, iova, len); +} + +static int +cdx_dma_unmap(struct rte_device *dev, void *addr, uint64_t iova, size_t len) +{ + struct rte_cdx_device *cdx_dev = RTE_DEV_TO_CDX_DEV(dev); + + if (!cdx_dev) { + rte_errno = EINVAL; + return -1; + } + + return rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD, + (uintptr_t)addr, iova, len); +} + +static enum rte_iova_mode +cdx_get_iommu_class(void) +{ + if (TAILQ_EMPTY(&rte_cdx_bus.device_list)) + return RTE_IOVA_DC; + + return RTE_IOVA_VA; +} + struct rte_cdx_bus rte_cdx_bus = { .bus = { .scan = cdx_scan, .probe = cdx_probe, .find_device = cdx_find_device, .parse = cdx_parse, + .dma_map = cdx_dma_map, + .dma_unmap = cdx_dma_unmap, + .get_iommu_class = cdx_get_iommu_class, }, .device_list = TAILQ_HEAD_INITIALIZER(rte_cdx_bus.device_list), .driver_list = TAILQ_HEAD_INITIALIZER(rte_cdx_bus.driver_list),