diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index cb5f36e497e9..4576d59a98a2 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -449,16 +449,39 @@ static int mlxsw_sp_port_set_mac_address(struct net_device *dev, void *p) return 0; } +static int mlxsw_sp_port_headroom_set(struct mlxsw_sp_port *mlxsw_sp_port, + int mtu) +{ + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; + u16 pg_size = 2 * MLXSW_SP_BYTES_TO_CELLS(mtu); + char pbmc_pl[MLXSW_REG_PBMC_LEN]; + int err; + + mlxsw_reg_pbmc_pack(pbmc_pl, mlxsw_sp_port->local_port, 0, 0); + err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(pbmc), pbmc_pl); + if (err) + return err; + mlxsw_reg_pbmc_lossy_buffer_pack(pbmc_pl, 0, pg_size); + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pbmc), pbmc_pl); +} + static int mlxsw_sp_port_change_mtu(struct net_device *dev, int mtu) { struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev); int err; - err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu); + err = mlxsw_sp_port_headroom_set(mlxsw_sp_port, mtu); if (err) return err; + err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu); + if (err) + goto err_port_mtu_set; dev->mtu = mtu; return 0; + +err_port_mtu_set: + mlxsw_sp_port_headroom_set(mlxsw_sp_port, dev->mtu); + return err; } static struct rtnl_link_stats64 * |