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GET /api/patches/113461/?format=api
{ "id": 113461, "url": "https://patches.dpdk.org/api/patches/113461/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/patch/20220627084917.2295-1-asaini@xilinx.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": "<20220627084917.2295-1-asaini@xilinx.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20220627084917.2295-1-asaini@xilinx.com", "date": "2022-06-27T08:49:17", "name": "vdpa/sfc: handle sync issue between qemu and vhost-user", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "fea9731d8658235d0ecd36417a16e8b2f9505b35", "submitter": { "id": 2468, "url": "https://patches.dpdk.org/api/people/2468/?format=api", "name": "", "email": "abhimanyu.saini@xilinx.com" }, "delegate": { "id": 2642, "url": "https://patches.dpdk.org/api/users/2642/?format=api", "username": "mcoquelin", "first_name": "Maxime", "last_name": "Coquelin", "email": "maxime.coquelin@redhat.com" }, "mbox": "https://patches.dpdk.org/project/dpdk/patch/20220627084917.2295-1-asaini@xilinx.com/mbox/", "series": [ { "id": 23781, "url": "https://patches.dpdk.org/api/series/23781/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=23781", "date": "2022-06-27T08:49:17", "name": "vdpa/sfc: handle sync issue between qemu and vhost-user", "version": 1, "mbox": "https://patches.dpdk.org/series/23781/mbox/" } ], "comments": "https://patches.dpdk.org/api/patches/113461/comments/", "check": "success", "checks": "https://patches.dpdk.org/api/patches/113461/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@inbox.dpdk.org", "Delivered-To": "patchwork@inbox.dpdk.org", "Received": [ "from mails.dpdk.org (mails.dpdk.org [217.70.189.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 4D392A0552;\n\tMon, 27 Jun 2022 10:49:36 +0200 (CEST)", "from [217.70.189.124] (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 8C04A410EF;\n\tMon, 27 Jun 2022 10:49:35 +0200 (CEST)", "from NAM11-CO1-obe.outbound.protection.outlook.com\n (mail-co1nam11on2083.outbound.protection.outlook.com [40.107.220.83])\n by mails.dpdk.org (Postfix) with ESMTP id 2C5C3400D5;\n Mon, 27 Jun 2022 10:49:34 +0200 (CEST)", "from MW3PR06CA0018.namprd06.prod.outlook.com (2603:10b6:303:2a::23)\n by DM4PR12MB5230.namprd12.prod.outlook.com (2603:10b6:5:399::11) with\n Microsoft SMTP Server (version=TLS1_2,\n cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5373.16; 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CTRY:US; LANG:en; SCL:1; SRV:;\n IPV:NLI; SFV:NSPM;\n H:mailrelay000000.14r1f435wfvunndds3vy4cdalc.xx.internal.cloudapp.net;\n PTR:InfoDomainNonexistent; CAT:NONE;\n SFS:(13230016)(4636009)(136003)(376002)(346002)(39860400002)(396003)(46966006)(36840700001)(478600001)(6916009)(316002)(8676002)(5660300002)(4326008)(9786002)(8936002)(2906002)(41300700001)(83170400001)(82740400003)(36860700001)(81166007)(40480700001)(26005)(7696005)(336012)(107886003)(2616005)(42882007)(47076005)(1076003)(426003)(2876002)(6666004)(83380400001)(54906003)(82310400005)(36756003)(186003)(70206006)(102446001)(36900700001);\n DIR:OUT; SFP:1101;", "X-OriginatorOrg": "amd.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "27 Jun 2022 08:49:30.2701 (UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n a1421afd-58dd-4abd-a762-08da5819f326", "X-MS-Exchange-CrossTenant-Id": "3dd8961f-e488-4e60-8e11-a82d994e183d", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "\n TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[20.83.241.18];\n Helo=[mailrelay000000.14r1f435wfvunndds3vy4cdalc.xx.internal.cloudapp.net]", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-AuthSource": "\n TreatMessagesAsInternal-CO1NAM11FT034.eop-nam11.prod.protection.outlook.com", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org" }, "content": "From: Abhimanyu Saini <absaini@amd.com>\n\nWhen DPDK app is running in the VF, it sometimes rings the doorbell\nbefore dev_config has had a chance to complete and hence it misses\nthe event. As workaround, ring the doorbell when vDPA reports the\nnotify_area to QEMU.\n\nFixes: 5e7596ba7cb3 (\"vdpa/sfc: introduce Xilinx vDPA driver\")\nCc: stable@dpdk.org\n\nSigned-off-by: Vijay Kumar Srivastava <vsrivast@xilinx.com>\nSigned-off-by: Abhimanyu Saini <absaini@amd.com>\n---\n drivers/vdpa/sfc/sfc_vdpa_ops.c | 14 ++++++++++++++\n 1 file changed, 14 insertions(+)", "diff": "diff --git a/drivers/vdpa/sfc/sfc_vdpa_ops.c b/drivers/vdpa/sfc/sfc_vdpa_ops.c\nindex b3d9b6c..63aa52d 100644\n--- a/drivers/vdpa/sfc/sfc_vdpa_ops.c\n+++ b/drivers/vdpa/sfc/sfc_vdpa_ops.c\n@@ -794,6 +794,8 @@\n \tint vfio_dev_fd;\n \tefx_rc_t rc;\n \tunsigned int bar_offset;\n+\tvolatile void *doorbell;\n+\tstruct rte_pci_device *pci_dev;\n \tstruct rte_vdpa_device *vdpa_dev;\n \tstruct sfc_vdpa_ops_data *ops_data;\n \tstruct vfio_region_info reg = { .argsz = sizeof(reg) };\n@@ -856,6 +858,18 @@\n \tsfc_vdpa_info(dev, \"vDPA ops get_notify_area :: offset : 0x%\" PRIx64,\n \t\t *offset);\n \n+\tpci_dev = sfc_vdpa_adapter_by_dev_handle(dev)->pdev;\n+\tdoorbell = (uint8_t *)pci_dev->mem_resource[reg.index].addr + *offset;\n+\n+\t/*\n+\t * virtio-net driver in VM sends queue notifications before\n+\t * vDPA has a chance to setup the queues and notification area,\n+\t * and hence the HW misses these doorbell notifications.\n+\t * Since, it is safe to send duplicate doorbell, send another\n+\t * doorbell from vDPA driver as workaround for this timing issue.\n+\t */\n+\trte_write16(qid, doorbell);\n+\n \treturn 0;\n }\n \n", "prefixes": [] }