mlxsw: ethtool: Pass link mode in use to ethtool

Currently, when user space queries the link's parameters, as speed and
duplex, each parameter is passed from the driver to ethtool.

Instead, pass the link mode bit in use.
In Spectrum-1, simply pass the bit that is set to '1' from PTYS register.
In Spectrum-2, pass the first link mode bit in the mask of the used
link mode.

Signed-off-by: Danielle Ratson <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>

Author: daniellerts

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -330,9 +330,9 @@ struct mlxsw_sp_port_type_speed_ops {
 	void (*from_ptys_link)(struct mlxsw_sp *mlxsw_sp, u32 ptys_eth_proto,
 			       unsigned long *mode);
 	u32 (*from_ptys_speed)(struct mlxsw_sp *mlxsw_sp, u32 ptys_eth_proto);
-	void (*from_ptys_speed_duplex)(struct mlxsw_sp *mlxsw_sp,
-				       bool carrier_ok, u32 ptys_eth_proto,
-				       struct ethtool_link_ksettings *cmd);
+	void (*from_ptys_link_mode)(struct mlxsw_sp *mlxsw_sp,
+				    bool carrier_ok, u32 ptys_eth_proto,
+				    struct ethtool_link_ksettings *cmd);
 	int (*ptys_max_speed)(struct mlxsw_sp_port *mlxsw_sp_port, u32 *p_max_speed);
 	u32 (*to_ptys_advert_link)(struct mlxsw_sp *mlxsw_sp,
 				   const struct ethtool_link_ksettings *cmd);

drivers/net/ethernet/mellanox/mlxsw/spectrum_ethtool.c

@@ -966,8 +966,8 @@ static int mlxsw_sp_port_get_link_ksettings(struct net_device *dev,
 
 	cmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
 	cmd->base.port = mlxsw_sp_port_connector_port(connector_type);
-	ops->from_ptys_speed_duplex(mlxsw_sp, netif_carrier_ok(dev),
-				    eth_proto_oper, cmd);
+	ops->from_ptys_link_mode(mlxsw_sp, netif_carrier_ok(dev),
+				 eth_proto_oper, cmd);
 
 	return 0;
 }
@@ -1221,19 +1221,21 @@ mlxsw_sp1_from_ptys_speed(struct mlxsw_sp *mlxsw_sp, u32 ptys_eth_proto)
 }
 
 static void
-mlxsw_sp1_from_ptys_speed_duplex(struct mlxsw_sp *mlxsw_sp, bool carrier_ok,
-				 u32 ptys_eth_proto,
-				 struct ethtool_link_ksettings *cmd)
+mlxsw_sp1_from_ptys_link_mode(struct mlxsw_sp *mlxsw_sp, bool carrier_ok,
+			      u32 ptys_eth_proto,
+			      struct ethtool_link_ksettings *cmd)
 {
-	cmd->base.speed = SPEED_UNKNOWN;
-	cmd->base.duplex = DUPLEX_UNKNOWN;
+	int i;
+
+	cmd->link_mode = -1;
 
 	if (!carrier_ok)
 		return;
 
-	cmd->base.speed = mlxsw_sp1_from_ptys_speed(mlxsw_sp, ptys_eth_proto);
-	if (cmd->base.speed != SPEED_UNKNOWN)
-		cmd->base.duplex = DUPLEX_FULL;
+	for (i = 0; i < MLXSW_SP1_PORT_LINK_MODE_LEN; i++) {
+		if (ptys_eth_proto & mlxsw_sp1_port_link_mode[i].mask)
+			cmd->link_mode = mlxsw_sp1_port_link_mode[i].mask_ethtool;
+	}
 }
 
 static int mlxsw_sp1_ptys_max_speed(struct mlxsw_sp_port *mlxsw_sp_port, u32 *p_max_speed)
@@ -1322,7 +1324,7 @@ const struct mlxsw_sp_port_type_speed_ops mlxsw_sp1_port_type_speed_ops = {
 	.from_ptys_supported_port	= mlxsw_sp1_from_ptys_supported_port,
 	.from_ptys_link			= mlxsw_sp1_from_ptys_link,
 	.from_ptys_speed		= mlxsw_sp1_from_ptys_speed,
-	.from_ptys_speed_duplex		= mlxsw_sp1_from_ptys_speed_duplex,
+	.from_ptys_link_mode		= mlxsw_sp1_from_ptys_link_mode,
 	.ptys_max_speed			= mlxsw_sp1_ptys_max_speed,
 	.to_ptys_advert_link		= mlxsw_sp1_to_ptys_advert_link,
 	.to_ptys_speed_lanes		= mlxsw_sp1_to_ptys_speed_lanes,
@@ -1658,19 +1660,24 @@ mlxsw_sp2_from_ptys_speed(struct mlxsw_sp *mlxsw_sp, u32 ptys_eth_proto)
 }
 
 static void
-mlxsw_sp2_from_ptys_speed_duplex(struct mlxsw_sp *mlxsw_sp, bool carrier_ok,
-				 u32 ptys_eth_proto,
-				 struct ethtool_link_ksettings *cmd)
+mlxsw_sp2_from_ptys_link_mode(struct mlxsw_sp *mlxsw_sp, bool carrier_ok,
+			      u32 ptys_eth_proto,
+			      struct ethtool_link_ksettings *cmd)
 {
-	cmd->base.speed = SPEED_UNKNOWN;
-	cmd->base.duplex = DUPLEX_UNKNOWN;
+	struct mlxsw_sp2_port_link_mode link;
+	int i;
+
+	cmd->link_mode = -1;
 
 	if (!carrier_ok)
 		return;
 
-	cmd->base.speed = mlxsw_sp2_from_ptys_speed(mlxsw_sp, ptys_eth_proto);
-	if (cmd->base.speed != SPEED_UNKNOWN)
-		cmd->base.duplex = DUPLEX_FULL;
+	for (i = 0; i < MLXSW_SP2_PORT_LINK_MODE_LEN; i++) {
+		if (ptys_eth_proto & mlxsw_sp2_port_link_mode[i].mask) {
+			link = mlxsw_sp2_port_link_mode[i];
+			cmd->link_mode = link.mask_ethtool[1];
+		}
+	}
 }
 
 static int mlxsw_sp2_ptys_max_speed(struct mlxsw_sp_port *mlxsw_sp_port, u32 *p_max_speed)
@@ -1793,7 +1800,7 @@ const struct mlxsw_sp_port_type_speed_ops mlxsw_sp2_port_type_speed_ops = {
 	.from_ptys_supported_port	= mlxsw_sp2_from_ptys_supported_port,
 	.from_ptys_link			= mlxsw_sp2_from_ptys_link,
 	.from_ptys_speed		= mlxsw_sp2_from_ptys_speed,
-	.from_ptys_speed_duplex		= mlxsw_sp2_from_ptys_speed_duplex,
+	.from_ptys_link_mode		= mlxsw_sp2_from_ptys_link_mode,
 	.ptys_max_speed			= mlxsw_sp2_ptys_max_speed,
 	.to_ptys_advert_link		= mlxsw_sp2_to_ptys_advert_link,
 	.to_ptys_speed_lanes		= mlxsw_sp2_to_ptys_speed_lanes,