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Thu, 1 Sep 2022 14:20:59 +0000 Received: from MN2PR12MB4192.namprd12.prod.outlook.com ([fe80::462:7fe:f04f:d0d5]) by MN2PR12MB4192.namprd12.prod.outlook.com ([fe80::462:7fe:f04f:d0d5%7]) with mapi id 15.20.5588.012; Thu, 1 Sep 2022 14:20:59 +0000 From: Jason Gunthorpe To: =?utf-8?q?Christian_K=C3=B6nig?= , dri-devel@lists.freedesktop.org, Leon Romanovsky , linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, Saeed Mahameed , Sumit Semwal Cc: Kamal Heib , Mohammad Kabat Subject: [PATCH 0/4] RDMA/mlx5: Support DMABUF in umems and enable ATS Date: Thu, 1 Sep 2022 11:20:52 -0300 Message-Id: <0-v1-bd147097458e+ede-umem_dmabuf_jgg@nvidia.com> X-ClientProxiedBy: MN2PR01CA0021.prod.exchangelabs.com (2603:10b6:208:10c::34) To MN2PR12MB4192.namprd12.prod.outlook.com (2603:10b6:208:1d5::15) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: bd6c9c99-a69d-4b58-877d-08da8c253031 X-MS-TrafficTypeDiagnostic: BY5PR12MB5000:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Several mlx5dv flows require umem and cannot work with MR. The intended use case is primarily for P2P transfers using dmabuf as a handle to the underlying PCI BAR memory from the exporter. When a PCI switch is present the P2P transfers can bypass the host bridge completely and go directly through the switch. ATS allows this bypass to function in more cases as translated TLPs issued after an ATS query allows the request redirect setting to be bypassed in the switch. Have mlx5 automatically use ATS in places where it makes sense. Jason Gunthorpe (4): net/mlx5: Add IFC bits for mkey ATS RDMA/core: Add UVERBS_ATTR_RAW_FD RDMA/mlx5: Add support for dmabuf to devx umem RDMA/mlx5: Enable ATS support for MRs and umems drivers/infiniband/core/uverbs_ioctl.c | 8 ++++ drivers/infiniband/hw/mlx5/devx.c | 55 +++++++++++++++++------- drivers/infiniband/hw/mlx5/mlx5_ib.h | 36 ++++++++++++++++ drivers/infiniband/hw/mlx5/mr.c | 5 ++- include/linux/mlx5/mlx5_ifc.h | 11 +++-- include/rdma/uverbs_ioctl.h | 13 ++++++ include/uapi/rdma/mlx5_user_ioctl_cmds.h | 1 + 7 files changed, 109 insertions(+), 20 deletions(-) base-commit: b90cb1053190353cc30f0fef0ef1f378ccc063c5