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Fri, 18 Jul 2025 04:52:12 -0700 From: Yonatan Maman To: =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Andrew Morton , Jason Gunthorpe , Leon Romanovsky CC: Lyude Paul , Danilo Krummrich , "David Airlie" , Simona Vetter , Alistair Popple , Ben Skeggs , Michael Guralnik , Or Har-Toov , Daisuke Matsuda , Shay Drory , , , , , , "Yonatan Maman" , Gal Shalom Subject: [PATCH v2 5/5] RDMA/mlx5: Enabling ATS for ODP memory Date: Fri, 18 Jul 2025 14:51:12 +0300 Message-ID: <20250718115112.3881129-6-ymaman@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250718115112.3881129-1-ymaman@nvidia.com> References: <20250718115112.3881129-1-ymaman@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002636C:EE_|SJ0PR12MB7460:EE_ X-MS-Office365-Filtering-Correlation-Id: e54f7cd4-055e-45db-d1cd-08ddc5f1962c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|7416014|376014|82310400026; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Jul 2025 11:52:35.2142 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e54f7cd4-055e-45db-d1cd-08ddc5f1962c X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002636C.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB7460 Content-Type: text/plain; charset="utf-8" From: Yonatan Maman ATS (Address Translation Services) mainly utilized to optimize PCI Peer-to-Peer transfers and prevent bus failures. This change employed ATS usage for ODP memory, to optimize DMA P2P for ODP memory. (e.g DMA P2P for private device pages - ODP memory). Signed-off-by: Yonatan Maman Signed-off-by: Gal Shalom --- drivers/infiniband/hw/mlx5/mlx5_ib.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/m= lx5/mlx5_ib.h index fde859d207ae..a7b7a565b7e8 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -1734,9 +1734,9 @@ static inline bool rt_supported(int ts_cap) static inline bool mlx5_umem_needs_ats(struct mlx5_ib_dev *dev, struct ib_umem *umem, int access_flags) { - if (!MLX5_CAP_GEN(dev->mdev, ats) || !umem->is_dmabuf) - return false; - return access_flags & IB_ACCESS_RELAXED_ORDERING; + if (MLX5_CAP_GEN(dev->mdev, ats) && (umem->is_dmabuf || umem->is_odp)) + return access_flags & IB_ACCESS_RELAXED_ORDERING; + return false; } =20 int set_roce_addr(struct mlx5_ib_dev *dev, u32 port_num, --=20 2.34.1