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net/mlx5: Use devl_ API in mlx5_esw_offloads_devlink_port_register
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The function mlx5_esw_offloads_devlink_port_register() calls
devlink_port_register() and devlink_rate_leaf_create(). Use devl_ API to
call devl_port_register() and devl_rate_leaf_create() accordingly and
add devlink instance lock in driver paths to this function.

Similarly, use devl_ API to call devl_port_unregister() and
devl_rate_leaf_destroy() in mlx5_esw_offloads_devlink_port_unregister()
and ensure locking devlink instance lock on the paths to this function
too.

This will be used by the downstream patch to invoke
mlx5_devlink_eswitch_mode_set() with devlink lock held.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Moshe Shemesh authored and Paolo Abeni committed Jul 12, 2022
1 parent 868232f commit f1bc646
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Showing 3 changed files with 19 additions and 5 deletions.
10 changes: 5 additions & 5 deletions drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
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Original file line number Diff line number Diff line change
Expand Up @@ -87,19 +87,19 @@ int mlx5_esw_offloads_devlink_port_register(struct mlx5_eswitch *esw, u16 vport_

devlink = priv_to_devlink(dev);
dl_port_index = mlx5_esw_vport_to_devlink_port_index(dev, vport_num);
err = devlink_port_register(devlink, dl_port, dl_port_index);
err = devl_port_register(devlink, dl_port, dl_port_index);
if (err)
goto reg_err;

err = devlink_rate_leaf_create(dl_port, vport);
err = devl_rate_leaf_create(dl_port, vport);
if (err)
goto rate_err;

vport->dl_port = dl_port;
return 0;

rate_err:
devlink_port_unregister(dl_port);
devl_port_unregister(dl_port);
reg_err:
mlx5_esw_dl_port_free(dl_port);
return err;
Expand All @@ -118,10 +118,10 @@ void mlx5_esw_offloads_devlink_port_unregister(struct mlx5_eswitch *esw, u16 vpo

if (vport->dl_port->devlink_rate) {
mlx5_esw_qos_vport_update_group(esw, vport, NULL, NULL);
devlink_rate_leaf_destroy(vport->dl_port);
devl_rate_leaf_destroy(vport->dl_port);
}

devlink_port_unregister(vport->dl_port);
devl_port_unregister(vport->dl_port);
mlx5_esw_dl_port_free(vport->dl_port);
vport->dl_port = NULL;
}
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4 changes: 4 additions & 0 deletions drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1296,6 +1296,7 @@ int mlx5_eswitch_enable_locked(struct mlx5_eswitch *esw, int num_vfs)
*/
int mlx5_eswitch_enable(struct mlx5_eswitch *esw, int num_vfs)
{
struct devlink *devlink;
bool toggle_lag;
int ret;

Expand All @@ -1307,6 +1308,8 @@ int mlx5_eswitch_enable(struct mlx5_eswitch *esw, int num_vfs)
if (toggle_lag)
mlx5_lag_disable_change(esw->dev);

devlink = priv_to_devlink(esw->dev);
devl_lock(devlink);
down_write(&esw->mode_lock);
if (!mlx5_esw_is_fdb_created(esw)) {
ret = mlx5_eswitch_enable_locked(esw, num_vfs);
Expand All @@ -1320,6 +1323,7 @@ int mlx5_eswitch_enable(struct mlx5_eswitch *esw, int num_vfs)
esw->esw_funcs.num_vfs = num_vfs;
}
up_write(&esw->mode_lock);
devl_unlock(devlink);

if (toggle_lag)
mlx5_lag_enable_change(esw->dev);
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10 changes: 10 additions & 0 deletions drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2177,8 +2177,10 @@ static int esw_create_restore_table(struct mlx5_eswitch *esw)
static int esw_offloads_start(struct mlx5_eswitch *esw,
struct netlink_ext_ack *extack)
{
struct devlink *devlink = priv_to_devlink(esw->dev);
int err, err1;

devl_lock(devlink);
esw->mode = MLX5_ESWITCH_OFFLOADS;
err = mlx5_eswitch_enable_locked(esw, esw->dev->priv.sriov.num_vfs);
if (err) {
Expand All @@ -2200,6 +2202,7 @@ static int esw_offloads_start(struct mlx5_eswitch *esw,
"Inline mode is different between vports");
}
}
devl_unlock(devlink);
return err;
}

Expand Down Expand Up @@ -3064,6 +3067,7 @@ static void esw_offloads_steering_cleanup(struct mlx5_eswitch *esw)
static void
esw_vfs_changed_event_handler(struct mlx5_eswitch *esw, const u32 *out)
{
struct devlink *devlink;
bool host_pf_disabled;
u16 new_num_vfs;

Expand All @@ -3075,6 +3079,8 @@ esw_vfs_changed_event_handler(struct mlx5_eswitch *esw, const u32 *out)
if (new_num_vfs == esw->esw_funcs.num_vfs || host_pf_disabled)
return;

devlink = priv_to_devlink(esw->dev);
devl_lock(devlink);
/* Number of VFs can only change from "0 to x" or "x to 0". */
if (esw->esw_funcs.num_vfs > 0) {
mlx5_eswitch_unload_vf_vports(esw, esw->esw_funcs.num_vfs);
Expand All @@ -3087,6 +3093,7 @@ esw_vfs_changed_event_handler(struct mlx5_eswitch *esw, const u32 *out)
return;
}
esw->esw_funcs.num_vfs = new_num_vfs;
devl_unlock(devlink);
}

static void esw_functions_changed_event_handler(struct work_struct *work)
Expand Down Expand Up @@ -3236,8 +3243,10 @@ int esw_offloads_enable(struct mlx5_eswitch *esw)
static int esw_offloads_stop(struct mlx5_eswitch *esw,
struct netlink_ext_ack *extack)
{
struct devlink *devlink = priv_to_devlink(esw->dev);
int err, err1;

devl_lock(devlink);
esw->mode = MLX5_ESWITCH_LEGACY;
err = mlx5_eswitch_enable_locked(esw, MLX5_ESWITCH_IGNORE_NUM_VFS);
if (err) {
Expand All @@ -3249,6 +3258,7 @@ static int esw_offloads_stop(struct mlx5_eswitch *esw,
"Failed setting eswitch back to offloads");
}
}
devl_unlock(devlink);

return err;
}
Expand Down

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