From bb6c346cef6fb0414865aaa6e2f3a11ceeeae14a Mon Sep 17 00:00:00 2001 From: Petr Machata Date: Wed, 20 Feb 2019 19:32:29 +0000 Subject: mlxsw: spectrum_buffers: Reject overlarge headroom size requests cap_max_headroom_size holds maximum headroom size supported. Overstepping that limit might under certain conditions lead to ASIC freeze. Query and store the value, and add mlxsw_sp_sb_max_headroom_cells() for obtaining the stored value. In __mlxsw_sp_port_headroom_set(), reject requests where the total port buffer is larger than the advertised maximum. Signed-off-by: Petr Machata Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum.h') diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h index 976843917c95..8bb83d0facc2 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h @@ -373,6 +373,7 @@ int mlxsw_sp_sb_occ_tc_port_bind_get(struct mlxsw_core_port *mlxsw_core_port, u32 *p_cur, u32 *p_max); u32 mlxsw_sp_cells_bytes(const struct mlxsw_sp *mlxsw_sp, u32 cells); u32 mlxsw_sp_bytes_cells(const struct mlxsw_sp *mlxsw_sp, u32 bytes); +u32 mlxsw_sp_sb_max_headroom_cells(const struct mlxsw_sp *mlxsw_sp); extern const struct mlxsw_sp_sb_vals mlxsw_sp1_sb_vals; extern const struct mlxsw_sp_sb_vals mlxsw_sp2_sb_vals; -- cgit v1.2.3