mlxsw: reg: Add SGCR.lag_lookup_pgt_base

Add SGCR.lag_lookup_pgt_base, which is used for configuring the base
address of the LAG table within the PGT table for cases when the driver
is responsible for the table placement.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -38,9 +38,18 @@ static const struct mlxsw_reg_info mlxsw_reg_##_name = {		\
 
 MLXSW_REG_DEFINE(sgcr, MLXSW_REG_SGCR_ID, MLXSW_REG_SGCR_LEN);
 
-static inline void mlxsw_reg_sgcr_pack(char *payload)
+/* reg_sgcr_lag_lookup_pgt_base
+ * Base address used for lookup in PGT table
+ * Supported when CONFIG_PROFILE.lag_mode = 1
+ * Note: when IGCR.ddd_lag_mode=0, the address shall be aligned to 8 entries.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, sgcr, lag_lookup_pgt_base, 0x0C, 0, 16);
+
+static inline void mlxsw_reg_sgcr_pack(char *payload, u16 lag_lookup_pgt_base)
 {
 	MLXSW_REG_ZERO(sgcr, payload);
+	mlxsw_reg_sgcr_lag_lookup_pgt_base_set(payload, lag_lookup_pgt_base);
 }
 
 /* SPAD - Switch Physical Address Register