From eceed3b1453d4115b4256ea1d24fab7b6eb7ba1f Mon Sep 17 00:00:00 2001 From: Shalom Toledo Date: Thu, 4 Jul 2019 10:07:38 +0300 Subject: [PATCH] mlxsw: spectrum_ptp: Enable/disable PTP shaper on a port when getting HWTSTAMP on/off In order to get more accurate hardware time stamping, the driver needs to enable PTP shaper on the port, for speeds lower than 40 Gbps. Enable the PTP shaper on the port when the user turns on the hardware time stamping, and disable it when the user turns off the hardware time stamping. Signed-off-by: Shalom Toledo Reviewed-by: Petr Machata Acked-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- .../ethernet/mellanox/mlxsw/spectrum_ptp.c | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c index 08e62cb3d7f2..49aba0ce896b 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c @@ -952,6 +952,54 @@ static int mlxsw_sp1_ptp_mtpppc_update(struct mlxsw_sp_port *mlxsw_sp_port, ing_types, egr_types); } +static bool mlxsw_sp1_ptp_hwtstamp_enabled(struct mlxsw_sp_port *mlxsw_sp_port) +{ + return mlxsw_sp_port->ptp.ing_types || mlxsw_sp_port->ptp.egr_types; +} + +static int +mlxsw_sp1_ptp_port_shaper_set(struct mlxsw_sp_port *mlxsw_sp_port, bool enable) +{ + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; + char qeec_pl[MLXSW_REG_QEEC_LEN]; + + mlxsw_reg_qeec_ptps_pack(qeec_pl, mlxsw_sp_port->local_port, enable); + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qeec), qeec_pl); +} + +static int mlxsw_sp1_ptp_port_shaper_check(struct mlxsw_sp_port *mlxsw_sp_port) +{ + const struct mlxsw_sp_port_type_speed_ops *port_type_speed_ops; + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; + char ptys_pl[MLXSW_REG_PTYS_LEN]; + u32 eth_proto_oper, speed; + bool ptps = false; + int err, i; + + if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port)) + return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, false); + + port_type_speed_ops = mlxsw_sp->port_type_speed_ops; + port_type_speed_ops->reg_ptys_eth_pack(mlxsw_sp, ptys_pl, + mlxsw_sp_port->local_port, 0, + false); + err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl); + if (err) + return err; + port_type_speed_ops->reg_ptys_eth_unpack(mlxsw_sp, ptys_pl, NULL, NULL, + ð_proto_oper); + + speed = port_type_speed_ops->from_ptys_speed(mlxsw_sp, eth_proto_oper); + for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) { + if (mlxsw_sp1_ptp_shaper_params[i].ethtool_speed == speed) { + ptps = true; + break; + } + } + + return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, ptps); +} + int mlxsw_sp1_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port, struct hwtstamp_config *config) { @@ -973,6 +1021,10 @@ int mlxsw_sp1_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port, mlxsw_sp_port->ptp.ing_types = ing_types; mlxsw_sp_port->ptp.egr_types = egr_types; + err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port); + if (err) + return err; + /* Notify the ioctl caller what we are actually timestamping. */ config->rx_filter = rx_filter; -- 2.30.2