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net/mlx5: Support enable_vnet devlink dev param

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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@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parav Pandit 2021-08-10 16:24:24 +03:00 committed by David S. Miller
parent 87158cedf0
commit 70862a5d60
3 changed files with 57 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/ethernet/mellanox/mlx5/core/dev.c
View File

@ -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 },

42
drivers/net/ethernet/mellanox/mlx5/core/devlink.c
View File

@ -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 @@ rdma_err:
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);
}

1
drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
View File

@ -275,5 +275,6 @@ 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__ */