mlxsw: Prepare 'bridge_type' field for SFMR usage

Under the legacy bridge model, the field 'bridge_type' is used only
in SFGC register, to determine the type of flood table (FID/FID offset).

Under the unified bridge model, it will be used also in SFMR register.
When a BUM packet needs to be flooded, SFGC is used to provide the
'mid_base' for PGT table. The access to SFGC is by
{packet type, bridge type}. Under the unified bridge model, software is
responsible for configuring 'bridge_type' as part of SFMR.

As preparation for the new required configuration, rename
'enum mlxsw_reg_sfgc_bridge_type' to 'enum mlxsw_reg_bridge_type'. Then
it can be used also in SFMR. In addition, align the names of the values to
internal documentation.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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

@@ -1054,9 +1054,10 @@ enum mlxsw_reg_sfgc_type {
  */
 MLXSW_ITEM32(reg, sfgc, type, 0x00, 0, 4);
 
-enum mlxsw_reg_sfgc_bridge_type {
-	MLXSW_REG_SFGC_BRIDGE_TYPE_1Q_FID = 0,
-	MLXSW_REG_SFGC_BRIDGE_TYPE_VFID = 1,
+/* bridge_type is used in SFGC and SFMR. */
+enum mlxsw_reg_bridge_type {
+	MLXSW_REG_BRIDGE_TYPE_0 = 0, /* Used for .1q FIDs. */
+	MLXSW_REG_BRIDGE_TYPE_1 = 1, /* Used for .1d FIDs. */
 };
 
 /* reg_sfgc_bridge_type
@@ -1111,7 +1112,7 @@ MLXSW_ITEM32(reg, sfgc, mid_base, 0x10, 0, 16);
 
 static inline void
 mlxsw_reg_sfgc_pack(char *payload, enum mlxsw_reg_sfgc_type type,
-		    enum mlxsw_reg_sfgc_bridge_type bridge_type,
+		    enum mlxsw_reg_bridge_type bridge_type,
 		    enum mlxsw_flood_table_type table_type,
 		    unsigned int flood_table)
 {

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

@@ -71,7 +71,7 @@ static const struct rhashtable_params mlxsw_sp_fid_vni_ht_params = {
 
 struct mlxsw_sp_flood_table {
 	enum mlxsw_sp_flood_type packet_type;
-	enum mlxsw_reg_sfgc_bridge_type bridge_type;
+	enum mlxsw_reg_bridge_type bridge_type;
 	enum mlxsw_flood_table_type table_type;
 	int table_index;
 };
@@ -709,19 +709,19 @@ static const struct mlxsw_sp_fid_ops mlxsw_sp_fid_8021d_ops = {
 static const struct mlxsw_sp_flood_table mlxsw_sp_fid_8021d_flood_tables[] = {
 	{
 		.packet_type	= MLXSW_SP_FLOOD_TYPE_UC,
-		.bridge_type	= MLXSW_REG_SFGC_BRIDGE_TYPE_VFID,
+		.bridge_type	= MLXSW_REG_BRIDGE_TYPE_1,
 		.table_type	= MLXSW_REG_SFGC_TABLE_TYPE_FID,
 		.table_index	= 0,
 	},
 	{
 		.packet_type	= MLXSW_SP_FLOOD_TYPE_MC,
-		.bridge_type	= MLXSW_REG_SFGC_BRIDGE_TYPE_VFID,
+		.bridge_type	= MLXSW_REG_BRIDGE_TYPE_1,
 		.table_type	= MLXSW_REG_SFGC_TABLE_TYPE_FID,
 		.table_index	= 1,
 	},
 	{
 		.packet_type	= MLXSW_SP_FLOOD_TYPE_BC,
-		.bridge_type	= MLXSW_REG_SFGC_BRIDGE_TYPE_VFID,
+		.bridge_type	= MLXSW_REG_BRIDGE_TYPE_1,
 		.table_type	= MLXSW_REG_SFGC_TABLE_TYPE_FID,
 		.table_index	= 2,
 	},