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GET /api/patches/28103/?format=api
{ "id": 28103, "url": "https://patches.dpdk.org/api/patches/28103/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/patch/20170831032618.7120-4-santosh.shukla@caviumnetworks.com/", "project": { "id": 1, "url": "https://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20170831032618.7120-4-santosh.shukla@caviumnetworks.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20170831032618.7120-4-santosh.shukla@caviumnetworks.com", "date": "2017-08-31T03:26:12", "name": "[dpdk-dev,v7,3/9] linuxapp/eal_pci: get iommu class", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "b3a61c62015a535a93eed279dad00565ae612e4b", "submitter": { "id": 480, "url": "https://patches.dpdk.org/api/people/480/?format=api", "name": "Santosh Shukla", "email": "santosh.shukla@caviumnetworks.com" }, "delegate": null, "mbox": "https://patches.dpdk.org/project/dpdk/patch/20170831032618.7120-4-santosh.shukla@caviumnetworks.com/mbox/", "series": [], "comments": "https://patches.dpdk.org/api/patches/28103/comments/", "check": "success", "checks": "https://patches.dpdk.org/api/patches/28103/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [IPv6:::1])\n\tby dpdk.org (Postfix) with ESMTP id 018A4377E;\n\tThu, 31 Aug 2017 05:27:16 +0200 (CEST)", "from NAM02-SN1-obe.outbound.protection.outlook.com\n\t(mail-sn1nam02on0082.outbound.protection.outlook.com [104.47.36.82])\n\tby dpdk.org (Postfix) with ESMTP id D66B3326B\n\tfor <dev@dpdk.org>; Thu, 31 Aug 2017 05:27:11 +0200 (CEST)", "from localhost.localdomain (111.93.218.67) by\n\tBN6PR07MB3089.namprd07.prod.outlook.com (10.172.105.7) with Microsoft\n\tSMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id\n\t15.1.1385.9; Thu, 31 Aug 2017 03:27:06 +0000" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=CAVIUMNETWORKS.onmicrosoft.com; s=selector1-cavium-com;\n\th=From:Date:Subject:Message-ID:Content-Type:MIME-Version;\n\tbh=KeVUfuJJg9Bt+i3tNI4iqJn9eKLu90TR4NU3ijucHP8=;\n\tb=XyhuRXPMBkk2F7/pF+y1hTYoP5gpH6mW09BZSWkokY0qMAlbcBVRPhAEZX/IFJJS2m05M1bjuqEzcKUJzs66JEsou+w88t2tjXYQfhiIYbhwa8yu1J3nHiZhegD9K+GHrzsbOlffuqHGrh750i8z0vLLmoK1JiA8nahMvPVe4Pk=", "Authentication-Results": "spf=none (sender IP is )\n\tsmtp.mailfrom=Santosh.Shukla@cavium.com; ", "From": "Santosh Shukla <santosh.shukla@caviumnetworks.com>", "To": "dev@dpdk.org", "Cc": "thomas@monjalon.net, jerin.jacob@caviumnetworks.com,\n\themant.agrawal@nxp.com, olivier.matz@6wind.com,\n\tmaxime.coquelin@redhat.com, \n\tsergio.gonzalez.monroy@intel.com, bruce.richardson@intel.com,\n\tshreyansh.jain@nxp.com, gaetan.rivet@6wind.com,\n\tanatoly.burakov@intel.com, \n\tstephen@networkplumber.org, aconole@redhat.com,\n\tSantosh Shukla <santosh.shukla@caviumnetworks.com>", "Date": "Thu, 31 Aug 2017 03:26:12 +0000", "Message-Id": "<20170831032618.7120-4-santosh.shukla@caviumnetworks.com>", "X-Mailer": "git-send-email 2.13.0", "In-Reply-To": "<20170831032618.7120-1-santosh.shukla@caviumnetworks.com>", "References": "<20170814161059.6684-1-santosh.shukla@caviumnetworks.com>\n\t<20170831032618.7120-1-santosh.shukla@caviumnetworks.com>", "MIME-Version": "1.0", "Content-Type": "text/plain", "X-Originating-IP": "[111.93.218.67]", "X-ClientProxiedBy": "PN1PR01CA0118.INDPRD01.PROD.OUTLOOK.COM (10.174.144.34) To\n\tBN6PR07MB3089.namprd07.prod.outlook.com (10.172.105.7)", "X-MS-PublicTrafficType": "Email", "X-MS-Office365-Filtering-Correlation-Id": "48267e18-15fd-4bdf-04b6-08d4f0202a35", "X-Microsoft-Antispam": "UriScan:; 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PCL:0;\n\tRULEID:(100000700101)(100105000095)(100000701101)(100105300095)(100000702101)(100105100095)(6040450)(601004)(2401047)(5005006)(8121501046)(10201501046)(3002001)(100000703101)(100105400095)(93006095)(6041248)(20161123558100)(201703131423075)(201702281528075)(201703061421075)(201703061406153)(20161123564025)(20161123562025)(20161123555025)(20161123560025)(6072148)(201708071742011)(100000704101)(100105200095)(100000705101)(100105500095);\n\tSRVR:BN6PR07MB3089; BCL:0; PCL:0;\n\tRULEID:(100000800101)(100110000095)(100000801101)(100110300095)(100000802101)(100110100095)(100000803101)(100110400095)(100000804101)(100110200095)(100000805101)(100110500095);\n\tSRVR:BN6PR07MB3089; ", "X-Forefront-PRVS": "04163EF38A", "X-Forefront-Antispam-Report": "SFV:NSPM;\n\tSFS:(10009020)(6069001)(6009001)(199003)(189002)(81156014)(8936002)(81166006)(8676002)(7736002)(6666003)(5003940100001)(305945005)(2950100002)(7416002)(2906002)(6916009)(42882006)(76176999)(50986999)(101416001)(50226002)(5660300001)(6486002)(6506006)(48376002)(50466002)(72206003)(5890100001)(36756003)(97736004)(478600001)(189998001)(42186005)(2361001)(2351001)(33646002)(106356001)(105586002)(110136004)(107886003)(5009440100003)(8656003)(6512007)(53936002)(4326008)(68736007)(1076002)(6116002)(3846002)(66066001)(47776003)(25786009);\n\tDIR:OUT; SFP:1101; SCL:1; SRVR:BN6PR07MB3089; H:localhost.localdomain;\n\tFPR:; \n\tSPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; ", "Received-SPF": "None (protection.outlook.com: cavium.com does not designate\n\tpermitted sender hosts)", "SpamDiagnosticOutput": "1:99", "SpamDiagnosticMetadata": "NSPM", "X-OriginatorOrg": "caviumnetworks.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "31 Aug 2017 03:27:06.7129\n\t(UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "711e4ccf-2e9b-4bcf-a551-4094005b6194", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "BN6PR07MB3089", "Subject": "[dpdk-dev] [PATCH v7 3/9] linuxapp/eal_pci: get iommu class", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<http://dpdk.org/ml/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://dpdk.org/ml/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<http://dpdk.org/ml/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Get iommu class of PCI device on the bus and returns preferred iova\nmapping mode for that bus.\n\nPatch also introduces RTE_PCI_DRV_IOVA_AS_VA drv flag.\nFlag used when driver needs to operate in iova=va mode.\n\nAlgorithm for iova scheme selection for PCI bus:\n0. If no device bound then return with RTE_IOVA_DC mapping mode,\nelse goto 1).\n1. Look for device attached to vfio kdrv and has .drv_flag set\nto RTE_PCI_DRV_IOVA_AS_VA.\n2. Look for any device attached to UIO class of driver.\n3. Check for vfio-noiommu mode enabled.\n\nIf 2) & 3) is false and 1) is true then select\nmapping scheme as RTE_IOVA_VA. Otherwise use default\nmapping scheme (RTE_IOVA_PA).\n\nSigned-off-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>\nSigned-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>\nReviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>\nAcked-by: Hemant Agrawal <hemant.agrawal@nxp.com>\n---\nv6 --> v7:\n- squashed v6 series patch no [01/12] & [05/12]..\n i.e.. moved RTE_PCI_DRV_IOVA_AS_VA flag into this patch. (Aaron comment).\n\n lib/librte_eal/common/include/rte_pci.h | 2 +\n lib/librte_eal/linuxapp/eal/eal_pci.c | 95 +++++++++++++++++++++++++\n lib/librte_eal/linuxapp/eal/eal_vfio.c | 19 +++++\n lib/librte_eal/linuxapp/eal/eal_vfio.h | 4 ++\n lib/librte_eal/linuxapp/eal/rte_eal_version.map | 1 +\n 5 files changed, 121 insertions(+)", "diff": "diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h\nindex 0e36de093..a67d77f22 100644\n--- a/lib/librte_eal/common/include/rte_pci.h\n+++ b/lib/librte_eal/common/include/rte_pci.h\n@@ -202,6 +202,8 @@ struct rte_pci_bus {\n #define RTE_PCI_DRV_INTR_RMV 0x0010\n /** Device driver needs to keep mapped resources if unsupported dev detected */\n #define RTE_PCI_DRV_KEEP_MAPPED_RES 0x0020\n+/** Device driver supports iova as va */\n+#define RTE_PCI_DRV_IOVA_AS_VA 0X0040\n \n /**\n * A structure describing a PCI mapping.\ndiff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c\nindex 8951ce742..9725fd493 100644\n--- a/lib/librte_eal/linuxapp/eal/eal_pci.c\n+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c\n@@ -45,6 +45,7 @@\n #include \"eal_filesystem.h\"\n #include \"eal_private.h\"\n #include \"eal_pci_init.h\"\n+#include \"eal_vfio.h\"\n \n /**\n * @file\n@@ -487,6 +488,100 @@ rte_pci_scan(void)\n \treturn -1;\n }\n \n+/*\n+ * Is pci device bound to any kdrv\n+ */\n+static inline int\n+pci_device_is_bound(void)\n+{\n+\tstruct rte_pci_device *dev = NULL;\n+\tint ret = 0;\n+\n+\tFOREACH_DEVICE_ON_PCIBUS(dev) {\n+\t\tif (dev->kdrv == RTE_KDRV_UNKNOWN ||\n+\t\t dev->kdrv == RTE_KDRV_NONE) {\n+\t\t\tcontinue;\n+\t\t} else {\n+\t\t\tret = 1;\n+\t\t\tbreak;\n+\t\t}\n+\t}\n+\treturn ret;\n+}\n+\n+/*\n+ * Any one of the device bound to uio\n+ */\n+static inline int\n+pci_device_bound_uio(void)\n+{\n+\tstruct rte_pci_device *dev = NULL;\n+\n+\tFOREACH_DEVICE_ON_PCIBUS(dev) {\n+\t\tif (dev->kdrv == RTE_KDRV_IGB_UIO ||\n+\t\t dev->kdrv == RTE_KDRV_UIO_GENERIC) {\n+\t\t\treturn 1;\n+\t\t}\n+\t}\n+\treturn 0;\n+}\n+\n+/*\n+ * Any one of the device has iova as va\n+ */\n+static inline int\n+pci_device_has_iova_va(void)\n+{\n+\tstruct rte_pci_device *dev = NULL;\n+\tstruct rte_pci_driver *drv = NULL;\n+\n+\tFOREACH_DRIVER_ON_PCIBUS(drv) {\n+\t\tif (drv && drv->drv_flags & RTE_PCI_DRV_IOVA_AS_VA) {\n+\t\t\tFOREACH_DEVICE_ON_PCIBUS(dev) {\n+\t\t\t\tif (dev->kdrv == RTE_KDRV_VFIO &&\n+\t\t\t\t rte_pci_match(drv, dev))\n+\t\t\t\t\treturn 1;\n+\t\t\t}\n+\t\t}\n+\t}\n+\treturn 0;\n+}\n+\n+/*\n+ * Get iommu class of PCI devices on the bus.\n+ */\n+enum rte_iova_mode\n+rte_pci_get_iommu_class(void)\n+{\n+\tbool is_bound;\n+\tbool is_vfio_noiommu_enabled = true;\n+\tbool has_iova_va;\n+\tbool is_bound_uio;\n+\n+\tis_bound = pci_device_is_bound();\n+\tif (!is_bound)\n+\t\treturn RTE_IOVA_DC;\n+\n+\thas_iova_va = pci_device_has_iova_va();\n+\tis_bound_uio = pci_device_bound_uio();\n+#ifdef VFIO_PRESENT\n+\tis_vfio_noiommu_enabled = vfio_noiommu_is_enabled() == 1 ? 1 : 0;\n+#endif\n+\n+\tif (has_iova_va && !is_bound_uio && !is_vfio_noiommu_enabled)\n+\t\treturn RTE_IOVA_VA;\n+\n+\tif (has_iova_va) {\n+\t\tRTE_LOG(WARNING, EAL, \"Some devices want iova as va but pa will be used because.. \");\n+\t\tif (is_vfio_noiommu_enabled)\n+\t\t\tRTE_LOG(WARNING, EAL, \"vfio-noiommu mode configured\\n\");\n+\t\tif (is_bound_uio)\n+\t\t\tRTE_LOG(WARNING, EAL, \"few device bound to UIO\\n\");\n+\t}\n+\n+\treturn RTE_IOVA_PA;\n+}\n+\n /* Read PCI config space. */\n int rte_pci_read_config(const struct rte_pci_device *device,\n \t\tvoid *buf, size_t len, off_t offset)\ndiff --git a/lib/librte_eal/linuxapp/eal/eal_vfio.c b/lib/librte_eal/linuxapp/eal/eal_vfio.c\nindex 946df7e31..c8a97b7e7 100644\n--- a/lib/librte_eal/linuxapp/eal/eal_vfio.c\n+++ b/lib/librte_eal/linuxapp/eal/eal_vfio.c\n@@ -816,4 +816,23 @@ vfio_noiommu_dma_map(int __rte_unused vfio_container_fd)\n \treturn 0;\n }\n \n+int\n+vfio_noiommu_is_enabled(void)\n+{\n+\tint fd, ret, cnt __rte_unused;\n+\tchar c;\n+\n+\tret = -1;\n+\tfd = open(VFIO_NOIOMMU_MODE, O_RDONLY);\n+\tif (fd < 0)\n+\t\treturn -1;\n+\n+\tcnt = read(fd, &c, 1);\n+\tif (c == 'Y')\n+\t\tret = 1;\n+\n+\tclose(fd);\n+\treturn ret;\n+}\n+\n #endif\ndiff --git a/lib/librte_eal/linuxapp/eal/eal_vfio.h b/lib/librte_eal/linuxapp/eal/eal_vfio.h\nindex 5ff63e5d7..26ea8e119 100644\n--- a/lib/librte_eal/linuxapp/eal/eal_vfio.h\n+++ b/lib/librte_eal/linuxapp/eal/eal_vfio.h\n@@ -150,6 +150,8 @@ struct vfio_config {\n #define VFIO_NOIOMMU_GROUP_FMT \"/dev/vfio/noiommu-%u\"\n #define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)\n #define VFIO_GET_REGION_IDX(x) (x >> 40)\n+#define VFIO_NOIOMMU_MODE \\\n+\t\"/sys/module/vfio/parameters/enable_unsafe_noiommu_mode\"\n \n /* DMA mapping function prototype.\n * Takes VFIO container fd as a parameter.\n@@ -210,6 +212,8 @@ int pci_vfio_is_enabled(void);\n \n int vfio_mp_sync_setup(void);\n \n+int vfio_noiommu_is_enabled(void);\n+\n #define SOCKET_REQ_CONTAINER 0x100\n #define SOCKET_REQ_GROUP 0x200\n #define SOCKET_CLR_GROUP 0x300\ndiff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map\nindex a15b382ff..40420ded3 100644\n--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map\n+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map\n@@ -247,5 +247,6 @@ DPDK_17.11 {\n \tglobal:\n \n \trte_pci_match;\n+\trte_pci_get_iommu_class;\n \n } DPDK_17.08;\n", "prefixes": [ "dpdk-dev", "v7", "3/9" ] }