mlxsw: spectrum_fid: Add an op for flood table initialization

In controlled flood mode, for each bridge FID family (i.e., 802.1Q and
802.1D) and packet type (i.e., UUC/MC/BC), the hardware needs to be told
which PGT address to use as the base address for the flood table and how
to determine the offset from the base for each FID.

The above is not needed in CFF mode where each FID has its own flood
table instead of the FID family itself.

Therefore, create a new FID family operation for the above configuration
and only implement it for the 802.1Q and 802.1D families in controlled
flood mode.

No functional changes intended.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/06f71415eec75811585ec597e1dd101b6dff77e7.1701183892.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: pmachata

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

@@ -95,6 +95,8 @@ struct mlxsw_sp_fid_ops {
 				  const struct net_device *nve_dev);
 	int (*vid_to_fid_rif_update)(const struct mlxsw_sp_fid *fid,
 				     const struct mlxsw_sp_rif *rif);
+	int (*flood_table_init)(struct mlxsw_sp_fid_family *fid_family,
+				const struct mlxsw_sp_flood_table *flood_table);
 };
 
 struct mlxsw_sp_fid_family {
@@ -1078,8 +1080,8 @@ mlxsw_sp_fid_8021d_vid_to_fid_rif_update(const struct mlxsw_sp_fid *fid,
 }
 
 static int
-mlxsw_sp_fid_flood_table_init(struct mlxsw_sp_fid_family *fid_family,
-			      const struct mlxsw_sp_flood_table *flood_table)
+mlxsw_sp_fid_flood_table_init_ctl(struct mlxsw_sp_fid_family *fid_family,
+				  const struct mlxsw_sp_flood_table *flood_table)
 {
 	enum mlxsw_sp_flood_type packet_type = flood_table->packet_type;
 	struct mlxsw_sp *mlxsw_sp = fid_family->mlxsw_sp;
@@ -1121,6 +1123,7 @@ static const struct mlxsw_sp_fid_ops mlxsw_sp_fid_8021d_ops_ctl = {
 	.nve_flood_index_clear	= mlxsw_sp_fid_8021d_nve_flood_index_clear,
 	.fdb_clear_offload	= mlxsw_sp_fid_8021d_fdb_clear_offload,
 	.vid_to_fid_rif_update  = mlxsw_sp_fid_8021d_vid_to_fid_rif_update,
+	.flood_table_init	= mlxsw_sp_fid_flood_table_init_ctl,
 };
 
 #define MLXSW_SP_FID_8021Q_MAX (VLAN_N_VID - 2)
@@ -1462,6 +1465,7 @@ static const struct mlxsw_sp_fid_ops mlxsw_sp_fid_8021q_ops_ctl = {
 	.nve_flood_index_clear	= mlxsw_sp_fid_8021d_nve_flood_index_clear,
 	.fdb_clear_offload	= mlxsw_sp_fid_8021q_fdb_clear_offload,
 	.vid_to_fid_rif_update  = mlxsw_sp_fid_8021q_vid_to_fid_rif_update,
+	.flood_table_init	= mlxsw_sp_fid_flood_table_init_ctl,
 };
 
 /* There are 4K-2 802.1Q FIDs */
@@ -1723,9 +1727,12 @@ mlxsw_sp_fid_flood_tables_init(struct mlxsw_sp_fid_family *fid_family)
 		const struct mlxsw_sp_flood_table *flood_table;
 
 		flood_table = &fid_family->flood_tables[i];
-		err = mlxsw_sp_fid_flood_table_init(fid_family, flood_table);
-		if (err)
-			goto err_flood_table_init;
+		if (fid_family->ops->flood_table_init) {
+			err = fid_family->ops->flood_table_init(fid_family,
+								flood_table);
+			if (err)
+				goto err_flood_table_init;
+		}
 	}
 
 	return 0;