From: Parav Pandit <parav@nvidia.com>
Date: Tue, 10 Aug 2021 16:24:22 +0300
Subject: net/mlx5: Support enable_eth devlink dev param
Patch-mainline: v5.15-rc1
Git-commit: a17beb28ed9dfd69e00ecd13cbd945fba8af4550
References: jsc#SLE-19253
Enable user to disable Ethernet 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_eth value false cmode driverinit
$ devlink dev reload pci/0000:06:00.0
At this point devlink instance do not create mlx5_core.eth.2 auxiliary
device for the Ethernet 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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlx5/core/dev.c | 42 +++++++++++++++
drivers/net/ethernet/mellanox/mlx5/core/devlink.c | 53 ++++++++++++++++++++
drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h | 3 +
3 files changed, 96 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/dev.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
@@ -53,7 +53,7 @@ static bool is_eth_rep_supported(struct
return true;
}
-static bool is_eth_supported(struct mlx5_core_dev *dev)
+bool mlx5_eth_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_CORE_EN))
return false;
@@ -105,6 +105,17 @@ static bool is_eth_supported(struct mlx5
return true;
}
+static bool is_eth_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_ETH,
+ &val);
+ return err ? false : val.vbool;
+}
+
static bool is_vnet_supported(struct mlx5_core_dev *dev)
{
if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET))
@@ -201,13 +212,15 @@ enum {
static const struct mlx5_adev_device {
const char *suffix;
bool (*is_supported)(struct mlx5_core_dev *dev);
+ bool (*is_enabled)(struct mlx5_core_dev *dev);
} mlx5_adev_devices[] = {
[MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
.is_supported = &is_vnet_supported },
[MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
.is_supported = &is_ib_supported },
[MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
- .is_supported = &is_eth_supported },
+ .is_supported = &mlx5_eth_supported,
+ .is_enabled = &is_eth_enabled },
[MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
.is_supported = &is_eth_rep_supported },
[MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
@@ -308,6 +321,14 @@ int mlx5_attach_device(struct mlx5_core_
if (!priv->adev[i]) {
bool is_supported = false;
+ if (mlx5_adev_devices[i].is_enabled) {
+ bool enabled;
+
+ enabled = mlx5_adev_devices[i].is_enabled(dev);
+ if (!enabled)
+ continue;
+ }
+
if (mlx5_adev_devices[i].is_supported)
is_supported = mlx5_adev_devices[i].is_supported(dev);
@@ -360,6 +381,14 @@ void mlx5_detach_device(struct mlx5_core
if (!priv->adev[i])
continue;
+ if (mlx5_adev_devices[i].is_enabled) {
+ bool enabled;
+
+ enabled = mlx5_adev_devices[i].is_enabled(dev);
+ if (!enabled)
+ goto skip_suspend;
+ }
+
adev = &priv->adev[i]->adev;
/* Auxiliary driver was unbind manually through sysfs */
if (!adev->dev.driver)
@@ -447,12 +476,21 @@ static void delete_drivers(struct mlx5_c
if (!priv->adev[i])
continue;
+ if (mlx5_adev_devices[i].is_enabled) {
+ bool enabled;
+
+ enabled = mlx5_adev_devices[i].is_enabled(dev);
+ if (!enabled)
+ goto del_adev;
+ }
+
if (mlx5_adev_devices[i].is_supported && !delete_all)
is_supported = mlx5_adev_devices[i].is_supported(dev);
if (is_supported)
continue;
+del_adev:
del_adev(&priv->adev[i]->adev);
priv->adev[i] = NULL;
}
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -595,6 +595,52 @@ static void mlx5_devlink_set_params_init
#endif
}
+static const struct devlink_param enable_eth_param =
+ DEVLINK_PARAM_GENERIC(ENABLE_ETH, BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
+ NULL, NULL, NULL);
+
+static int mlx5_devlink_eth_param_register(struct devlink *devlink)
+{
+ struct mlx5_core_dev *dev = devlink_priv(devlink);
+ union devlink_param_value value;
+ int err;
+
+ if (!mlx5_eth_supported(dev))
+ return 0;
+
+ err = devlink_param_register(devlink, &enable_eth_param);
+ if (err)
+ return err;
+
+ value.vbool = true;
+ devlink_param_driverinit_value_set(devlink,
+ DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,
+ value);
+ devlink_param_publish(devlink, &enable_eth_param);
+ return 0;
+}
+
+static void mlx5_devlink_eth_param_unregister(struct devlink *devlink)
+{
+ struct mlx5_core_dev *dev = devlink_priv(devlink);
+
+ if (!mlx5_eth_supported(dev))
+ return;
+
+ devlink_param_unpublish(devlink, &enable_eth_param);
+ devlink_param_unregister(devlink, &enable_eth_param);
+}
+
+static int mlx5_devlink_auxdev_params_register(struct devlink *devlink)
+{
+ return mlx5_devlink_eth_param_register(devlink);
+}
+
+static void mlx5_devlink_auxdev_params_unregister(struct devlink *devlink)
+{
+ mlx5_devlink_eth_param_unregister(devlink);
+}
+
#define MLX5_TRAP_DROP(_id, _group_id) \
DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
@@ -653,6 +699,10 @@ int mlx5_devlink_register(struct devlink
mlx5_devlink_set_params_init_values(devlink);
devlink_params_publish(devlink);
+ err = mlx5_devlink_auxdev_params_register(devlink);
+ if (err)
+ goto auxdev_reg_err;
+
err = mlx5_devlink_traps_register(devlink);
if (err)
goto traps_reg_err;
@@ -660,6 +710,8 @@ int mlx5_devlink_register(struct devlink
return 0;
traps_reg_err:
+ mlx5_devlink_auxdev_params_unregister(devlink);
+auxdev_reg_err:
devlink_params_unregister(devlink, mlx5_devlink_params,
ARRAY_SIZE(mlx5_devlink_params));
params_reg_err:
@@ -670,6 +722,7 @@ params_reg_err:
void mlx5_devlink_unregister(struct devlink *devlink)
{
mlx5_devlink_traps_unregister(devlink);
+ mlx5_devlink_auxdev_params_unregister(devlink);
devlink_params_unpublish(devlink);
devlink_params_unregister(devlink, mlx5_devlink_params,
ARRAY_SIZE(mlx5_devlink_params));
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -277,4 +277,7 @@ static inline u32 mlx5_sriov_get_vf_tota
return MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix);
}
+
+bool mlx5_eth_supported(struct mlx5_core_dev *dev);
+
#endif /* __MLX5_CORE_H__ */