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Message-ID: <20210810132424.9129-11-parav@nvidia.com>
Date: Tue, 10 Aug 2021 16:24:24 +0300
From: Parav Pandit <parav@...dia.com>
To: <davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>
CC: <linux-rdma@...r.kernel.org>,
<virtualization@...ts.linux-foundation.org>,
Parav Pandit <parav@...dia.com>,
Leon Romanovsky <leonro@...dia.com>
Subject: [PATCH RESEND net-next 10/10] net/mlx5: Support enable_vnet devlink dev param
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 <parav@...dia.com>
Reviewed-by: Leon Romanovsky <leonro@...dia.com>
---
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
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