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Tue, 10 Aug 2021 11:46:46 +0000 Received: from sw-mtx-036.mtx.labs.mlnx (172.20.187.6) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 10 Aug 2021 11:46:44 +0000 From: Parav Pandit To: , , CC: Parav Pandit , Leon Romanovsky Subject: [PATCH net-next 10/10] net/mlx5: Support enable_vnet devlink dev param Date: Tue, 10 Aug 2021 14:46:20 +0300 Message-ID: <20210810114620.8397-11-parav@nvidia.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210810114620.8397-1-parav@nvidia.com> References: <20210810114620.8397-1-parav@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [172.20.187.6] X-ClientProxiedBy: HQMAIL101.nvidia.com (172.20.187.10) To HQMAIL107.nvidia.com (172.20.187.13) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e8519c82-8d6c-4402-39e5-08d95bf4881c X-MS-TrafficTypeDiagnostic: BYAPR12MB2648: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4125; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Aug 2021 11:46:46.1655 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e8519c82-8d6c-4402-39e5-08d95bf4881c X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.34];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT064.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR12MB2648 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Enable user to disable VDPA net auxiliary device so that when it is not required, user can disable it. For example, $ devlink dev param set pci/0000:06:00.0 \ name enable_vnet value false cmode driverinit $ devlink dev reload pci/0000:06:00.0 At this point devlink instance do not create auxiliary device mlx5_core.vnet.2 for the VDPA net functionality. Signed-off-by: Parav Pandit Reviewed-by: Leon Romanovsky --- drivers/net/ethernet/mellanox/mlx5/core/dev.c | 16 ++++++- .../net/ethernet/mellanox/mlx5/core/devlink.c | 42 +++++++++++++++++++ .../ethernet/mellanox/mlx5/core/mlx5_core.h | 1 + 3 files changed, 57 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/dev.c b/drivers/net/ethernet/mellanox/mlx5/core/dev.c index cb86844099c0..ff6b03dc7e32 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/dev.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/dev.c @@ -116,7 +116,7 @@ static bool is_eth_enabled(struct mlx5_core_dev *dev) return err ? false : val.vbool; } -static bool is_vnet_supported(struct mlx5_core_dev *dev) +bool mlx5_vnet_supported(struct mlx5_core_dev *dev) { if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET)) return false; @@ -138,6 +138,17 @@ static bool is_vnet_supported(struct mlx5_core_dev *dev) return true; } +static bool is_vnet_enabled(struct mlx5_core_dev *dev) +{ + union devlink_param_value val; + int err; + + err = devlink_param_driverinit_value_get(priv_to_devlink(dev), + DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET, + &val); + return err ? false : val.vbool; +} + static bool is_ib_rep_supported(struct mlx5_core_dev *dev) { if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND)) @@ -226,7 +237,8 @@ static const struct mlx5_adev_device { bool (*is_enabled)(struct mlx5_core_dev *dev); } mlx5_adev_devices[] = { [MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet", - .is_supported = &is_vnet_supported }, + .is_supported = &mlx5_vnet_supported, + .is_enabled = &is_vnet_enabled }, [MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma", .is_supported = &mlx5_rdma_supported, .is_enabled = &is_ib_enabled }, diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c index f247ffb325a9..6f4d7c7f06e0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c @@ -680,6 +680,42 @@ static void mlx5_devlink_rdma_param_unregister(struct devlink *devlink) devlink_param_unregister(devlink, &enable_rdma_param); } +static const struct devlink_param enable_vnet_param = + DEVLINK_PARAM_GENERIC(ENABLE_VNET, BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), + NULL, NULL, NULL); + +static int mlx5_devlink_vnet_param_register(struct devlink *devlink) +{ + struct mlx5_core_dev *dev = devlink_priv(devlink); + union devlink_param_value value; + int err; + + if (!mlx5_vnet_supported(dev)) + return 0; + + err = devlink_param_register(devlink, &enable_vnet_param); + if (err) + return err; + + value.vbool = true; + devlink_param_driverinit_value_set(devlink, + DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET, + value); + devlink_param_publish(devlink, &enable_rdma_param); + return 0; +} + +static void mlx5_devlink_vnet_param_unregister(struct devlink *devlink) +{ + struct mlx5_core_dev *dev = devlink_priv(devlink); + + if (!mlx5_vnet_supported(dev)) + return; + + devlink_param_unpublish(devlink, &enable_vnet_param); + devlink_param_unregister(devlink, &enable_vnet_param); +} + static int mlx5_devlink_auxdev_params_register(struct devlink *devlink) { int err; @@ -692,8 +728,13 @@ static int mlx5_devlink_auxdev_params_register(struct devlink *devlink) if (err) goto rdma_err; + err = mlx5_devlink_vnet_param_register(devlink); + if (err) + goto vnet_err; return 0; +vnet_err: + mlx5_devlink_rdma_param_unregister(devlink); rdma_err: mlx5_devlink_eth_param_unregister(devlink); return err; @@ -701,6 +742,7 @@ static int mlx5_devlink_auxdev_params_register(struct devlink *devlink) static void mlx5_devlink_auxdev_params_unregister(struct devlink *devlink) { + mlx5_devlink_vnet_param_unregister(devlink); mlx5_devlink_rdma_param_unregister(devlink); mlx5_devlink_eth_param_unregister(devlink); } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h index b36fbcdc048e..2059b7319867 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h @@ -273,5 +273,6 @@ static inline u32 mlx5_sriov_get_vf_total_msix(struct pci_dev *pdev) bool mlx5_eth_supported(struct mlx5_core_dev *dev); bool mlx5_rdma_supported(struct mlx5_core_dev *dev); +bool mlx5_vnet_supported(struct mlx5_core_dev *dev); #endif /* __MLX5_CORE_H__ */ -- 2.26.2