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net/mlx5: E-switch, refactor eswitch mode change

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The E-switch mode was previously updated before removing and re-adding the
IB device, which could cause a temporary mismatch between the E-switch mode
and the IB device configuration.

To prevent this discrepancy, the IB device is now removed first, then
the E-switch mode is updated, and finally, the IB device is re-added.
This sequence ensures consistent alignment between the E-switch mode and
the IB device whenever the mode changes, regardless of the new mode value.

Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241107194357.683732-2-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Patrisious Haddad 2024-11-07 21:43:46 +02:00 committed by Jakub Kicinski
parent 7d3f3b4367
commit ab85ebf437
2 changed files with 21 additions and 6 deletions
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1
drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
View File

@ -1490,7 +1490,6 @@ int mlx5_eswitch_enable_locked(struct mlx5_eswitch *esw, int num_vfs)
if (esw->mode == MLX5_ESWITCH_LEGACY) {
err = esw_legacy_enable(esw);
} else {
mlx5_rescan_drivers(esw->dev);
err = esw_offloads_enable(esw);
}

26
drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
View File

@ -2332,18 +2332,35 @@ out_free:
return err;
}
static void esw_mode_change(struct mlx5_eswitch *esw, u16 mode)
{
mlx5_devcom_comp_lock(esw->dev->priv.hca_devcom_comp);
if (esw->dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV) {
esw->mode = mode;
mlx5_devcom_comp_unlock(esw->dev->priv.hca_devcom_comp);
return;
}
esw->dev->priv.flags |= MLX5_PRIV_FLAGS_DISABLE_IB_ADEV;
mlx5_rescan_drivers_locked(esw->dev);
esw->mode = mode;
esw->dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_IB_ADEV;
mlx5_rescan_drivers_locked(esw->dev);
mlx5_devcom_comp_unlock(esw->dev->priv.hca_devcom_comp);
}
static int esw_offloads_start(struct mlx5_eswitch *esw,
struct netlink_ext_ack *extack)
{
int err;
esw->mode = MLX5_ESWITCH_OFFLOADS;
esw_mode_change(esw, MLX5_ESWITCH_OFFLOADS);
err = mlx5_eswitch_enable_locked(esw, esw->dev->priv.sriov.num_vfs);
if (err) {
NL_SET_ERR_MSG_MOD(extack,
"Failed setting eswitch to offloads");
esw->mode = MLX5_ESWITCH_LEGACY;
mlx5_rescan_drivers(esw->dev);
esw_mode_change(esw, MLX5_ESWITCH_LEGACY);
return err;
}
if (esw->offloads.inline_mode == MLX5_INLINE_MODE_NONE) {
@ -3584,7 +3601,7 @@ static int esw_offloads_stop(struct mlx5_eswitch *esw,
{
int err;
esw->mode = MLX5_ESWITCH_LEGACY;
esw_mode_change(esw, MLX5_ESWITCH_LEGACY);
/* If changing from switchdev to legacy mode without sriov enabled,
* no need to create legacy fdb.
@ -3770,7 +3787,6 @@ int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
err = esw_offloads_start(esw, extack);
} else if (mode == DEVLINK_ESWITCH_MODE_LEGACY) {
err = esw_offloads_stop(esw, extack);
mlx5_rescan_drivers(esw->dev);
} else {
err = -EINVAL;
}