net: dsa: mv88e6xxx: factorize bridge support

Add MV88E6XXX_FLAG_PORTSTATE and MV88E6XXX_FLAG_VLANTABLE flags to
identify switch models with required 802.1D operations.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6123.c

@@ -133,6 +133,9 @@ struct dsa_switch_driver mv88e6123_switch_driver = {
 	.set_eeprom		= mv88e6xxx_set_eeprom,
 	.get_regs_len		= mv88e6xxx_get_regs_len,
 	.get_regs		= mv88e6xxx_get_regs,
+	.port_bridge_join	= mv88e6xxx_port_bridge_join,
+	.port_bridge_leave	= mv88e6xxx_port_bridge_leave,
+	.port_stp_state_set	= mv88e6xxx_port_stp_state_set,
 };
 
 MODULE_ALIAS("platform:mv88e6123");

drivers/net/dsa/mv88e6131.c

@@ -168,6 +168,7 @@ struct dsa_switch_driver mv88e6131_switch_driver = {
 	.adjust_link		= mv88e6xxx_adjust_link,
 	.port_bridge_join	= mv88e6xxx_port_bridge_join,
 	.port_bridge_leave	= mv88e6xxx_port_bridge_leave,
+	.port_stp_state_set	= mv88e6xxx_port_stp_state_set,
 	.port_vlan_filtering	= mv88e6xxx_port_vlan_filtering,
 	.port_vlan_prepare	= mv88e6xxx_port_vlan_prepare,
 	.port_vlan_add		= mv88e6xxx_port_vlan_add,

drivers/net/dsa/mv88e6xxx.c

@@ -1369,6 +1369,9 @@ void mv88e6xxx_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int stp_state;
 
+	if (!mv88e6xxx_has(ps, MV88E6XXX_FLAG_PORTSTATE))
+		return;
+
 	switch (state) {
 	case BR_STATE_DISABLED:
 		stp_state = PORT_CONTROL_STATE_DISABLED;
@@ -2430,6 +2433,9 @@ int mv88e6xxx_port_bridge_join(struct dsa_switch *ds, int port,
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int i, err = 0;
 
+	if (!mv88e6xxx_has(ps, MV88E6XXX_FLAG_VLANTABLE))
+		return -EOPNOTSUPP;
+
 	mutex_lock(&ps->smi_mutex);
 
 	/* Assign the bridge and remap each port's VLANTable */
@@ -2454,6 +2460,9 @@ void mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port)
 	struct net_device *bridge = ps->ports[port].bridge_dev;
 	int i;
 
+	if (!mv88e6xxx_has(ps, MV88E6XXX_FLAG_VLANTABLE))
+		return;
+
 	mutex_lock(&ps->smi_mutex);
 
 	/* Unassign the bridge and remap each port's VLANTable */

drivers/net/dsa/mv88e6xxx.h

@@ -360,6 +360,11 @@ enum mv88e6xxx_cap {
 	 */
 	MV88E6XXX_CAP_EEPROM,
 
+	/* Port State Filtering for 802.1D Spanning Tree.
+	 * See PORT_CONTROL_STATE_* values in the PORT_CONTROL register.
+	 */
+	MV88E6XXX_CAP_PORTSTATE,
+
 	/* PHY Polling Unit.
 	 * See GLOBAL_CONTROL_PPU_ENABLE and GLOBAL_STATUS_PPU_POLLING.
 	 */
@@ -383,50 +388,67 @@ enum mv88e6xxx_cap {
 	 */
 	MV88E6XXX_CAP_TEMP,
 	MV88E6XXX_CAP_TEMP_LIMIT,
+
+	/* In-chip Port Based VLANs.
+	 * Each port VLANTable register (see PORT_BASE_VLAN) is used to restrict
+	 * the output (or egress) ports to which it is allowed to send frames.
+	 */
+	MV88E6XXX_CAP_VLANTABLE,
 };
 
 /* Bitmask of capabilities */
 #define MV88E6XXX_FLAG_EEE		BIT(MV88E6XXX_CAP_EEE)
 #define MV88E6XXX_FLAG_EEPROM		BIT(MV88E6XXX_CAP_EEPROM)
+#define MV88E6XXX_FLAG_PORTSTATE	BIT(MV88E6XXX_CAP_PORTSTATE)
 #define MV88E6XXX_FLAG_PPU		BIT(MV88E6XXX_CAP_PPU)
 #define MV88E6XXX_FLAG_SMI_PHY		BIT(MV88E6XXX_CAP_SMI_PHY)
 #define MV88E6XXX_FLAG_SWITCH_MAC	BIT(MV88E6XXX_CAP_SWITCH_MAC_WOL_WOF)
 #define MV88E6XXX_FLAG_TEMP		BIT(MV88E6XXX_CAP_TEMP)
 #define MV88E6XXX_FLAG_TEMP_LIMIT	BIT(MV88E6XXX_CAP_TEMP_LIMIT)
+#define MV88E6XXX_FLAG_VLANTABLE	BIT(MV88E6XXX_CAP_VLANTABLE)
 
 #define MV88E6XXX_FLAGS_FAMILY_6095	\
-	MV88E6XXX_FLAG_PPU
+	(MV88E6XXX_FLAG_PPU |		\
+	 MV88E6XXX_FLAG_VLANTABLE)
 
 #define MV88E6XXX_FLAGS_FAMILY_6097	\
-	MV88E6XXX_FLAG_PPU
+	(MV88E6XXX_FLAG_PPU |		\
+	 MV88E6XXX_FLAG_VLANTABLE)
 
 #define MV88E6XXX_FLAGS_FAMILY_6165	\
 	(MV88E6XXX_FLAG_SWITCH_MAC |	\
 	 MV88E6XXX_FLAG_TEMP)
 
 #define MV88E6XXX_FLAGS_FAMILY_6185	\
-	MV88E6XXX_FLAG_PPU
+	(MV88E6XXX_FLAG_PPU |		\
+	 MV88E6XXX_FLAG_VLANTABLE)
 
 #define MV88E6XXX_FLAGS_FAMILY_6320	\
 	(MV88E6XXX_FLAG_EEE |		\
 	 MV88E6XXX_FLAG_EEPROM |	\
+	 MV88E6XXX_FLAG_PORTSTATE |	\
 	 MV88E6XXX_FLAG_SMI_PHY |	\
 	 MV88E6XXX_FLAG_SWITCH_MAC |	\
 	 MV88E6XXX_FLAG_TEMP |		\
-	 MV88E6XXX_FLAG_TEMP_LIMIT)
+	 MV88E6XXX_FLAG_TEMP_LIMIT |	\
+	 MV88E6XXX_FLAG_VLANTABLE)
 
 #define MV88E6XXX_FLAGS_FAMILY_6351	\
-	(MV88E6XXX_FLAG_SMI_PHY |	\
+	(MV88E6XXX_FLAG_PORTSTATE |	\
+	 MV88E6XXX_FLAG_SMI_PHY |	\
 	 MV88E6XXX_FLAG_SWITCH_MAC |	\
-	 MV88E6XXX_FLAG_TEMP)
+	 MV88E6XXX_FLAG_TEMP |		\
+	 MV88E6XXX_FLAG_VLANTABLE)
 
 #define MV88E6XXX_FLAGS_FAMILY_6352	\
 	(MV88E6XXX_FLAG_EEE |		\
 	 MV88E6XXX_FLAG_EEPROM |	\
-	 MV88E6XXX_FLAG_SMI_PHY	|	\
+	 MV88E6XXX_FLAG_PORTSTATE |	\
+	 MV88E6XXX_FLAG_SMI_PHY |	\
 	 MV88E6XXX_FLAG_SWITCH_MAC |	\
 	 MV88E6XXX_FLAG_TEMP |		\
-	 MV88E6XXX_FLAG_TEMP_LIMIT)
+	 MV88E6XXX_FLAG_TEMP_LIMIT |	\
+	 MV88E6XXX_FLAG_VLANTABLE)
 
 struct mv88e6xxx_info {
 	enum mv88e6xxx_family family;