[PATCH net-next v4 11/12] net: dsa: vsc73xx: Add bridge support

[Pawel Dembicki <paweldembicki@gmail.com>]

This patch adds bridge support for the vsc73xx driver.

The vsc73xx requires minimal operations and ithe generic
dsa_tag_8021q_bridge_* API is sufficient.
The forwarding matrix is managed by vsc73xx_port_stp_state_set() ->
vsc73xx_refresh_fwd_map()i routine, which is called immediately after
.port_bridge_join() and .port_bridge_leave().

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v4:
  - resend only
v3:
  - improved commit description
  - added 'Reviewed-by'
v2, v1:
  - Use generic functions instead unnecessary intermediary shims
---
Before patch series split:
https://patchwork.kernel.org/project/netdevbpf/list/?series=841034&state=%2A&archive=both
v8:
  - resend only
v7:
  - added 'Reviewed-by' only
v6:
  - resend only
v5:
  - added 'Reviewed-by' only
v4:
  - remove forward configuration after stp patch refactoring
  - implement new define with max num of bridges for tag8021q devices
v3:
  - All vlan commits was reworked
  - move VLAN_AWR and VLAN_DBLAWR to port setup in other commit
  - drop vlan table upgrade
v2:
  - no changes done
---
 drivers/net/dsa/vitesse-vsc73xx-core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index 25c3cd661b30..d0e501bbd57d 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -691,6 +691,9 @@ static int vsc73xx_setup(struct dsa_switch *ds)
 
 	dev_info(vsc->dev, "set up the switch\n");
 
+	ds->untag_bridge_pvid = true;
+	ds->max_num_bridges = DSA_TAG_8021Q_MAX_NUM_BRIDGES;
+
 	/* Issue RESET */
 	vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
 		      VSC73XX_GLORESET_MASTER_RESET);
@@ -1716,6 +1719,8 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.get_sset_count = vsc73xx_get_sset_count,
 	.port_enable = vsc73xx_port_enable,
 	.port_disable = vsc73xx_port_disable,
+	.port_bridge_join = dsa_tag_8021q_bridge_join,
+	.port_bridge_leave = dsa_tag_8021q_bridge_leave,
 	.port_change_mtu = vsc73xx_change_mtu,
 	.port_max_mtu = vsc73xx_get_max_mtu,
 	.port_stp_state_set = vsc73xx_port_stp_state_set,
-- 
2.34.1