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mlxsw: spectrum_buffers: Prevent changing CPU port's configuration

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Next patch is going to register the CPU port with devlink, but only so
that the CPU port's shared buffer configuration and occupancy could be
queried.

Prevent changing CPU port's shared buffer threshold and binding
configuration.

Signed-off-by: Shalom Toledo <shalomt@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shalom Toledo 2019-09-16 18:04:20 +03:00 committed by David S. Miller
parent b63e1a02d7
commit 9d0aa053ea
1 changed files with 10 additions and 0 deletions
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10
drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
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@ -1085,6 +1085,11 @@ int mlxsw_sp_sb_port_pool_set(struct mlxsw_core_port *mlxsw_core_port,
u32 max_buff;
int err;
if (local_port == MLXSW_PORT_CPU_PORT) {
NL_SET_ERR_MSG_MOD(extack, "Changing CPU port's threshold is forbidden");
return -EINVAL;
}
err = mlxsw_sp_sb_threshold_in(mlxsw_sp, pool_index,
threshold, &max_buff, extack);
if (err)
@ -1130,6 +1135,11 @@ int mlxsw_sp_sb_tc_pool_bind_set(struct mlxsw_core_port *mlxsw_core_port,
u32 max_buff;
int err;
if (local_port == MLXSW_PORT_CPU_PORT) {
NL_SET_ERR_MSG_MOD(extack, "Changing CPU port's binding is forbidden");
return -EINVAL;
}
if (dir != mlxsw_sp->sb_vals->pool_dess[pool_index].dir) {
NL_SET_ERR_MSG_MOD(extack, "Binding egress TC to ingress pool and vice versa is forbidden");
return -EINVAL;