[PATCH net-next v2 11/20] net: ethernet: ti: cpsw: fix allmulti cfg in dual_mac mode

[Grygorii Strashko]

Now CPSW ALE will set/clean Host port bit in Unregistered Multicast Flood
Mask (UNREG_MCAST_FLOOD_MASK) for every VLAN without checking if this port
belongs to VLAN or not when ALLMULTI mode flag is set for nedev. This is
working in non dual_mac mode, but in dual_mac - it causes
enabling/disabling ALLMULTI flag for both ports.

Hence fix it by adding additional parameter to cpsw_ale_set_allmulti() to
specify ALE port number for which ALLMULTI has to be enabled and check if
port belongs to VLAN before modifying UNREG_MCAST_FLOOD_MASK.

Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
---
changes in v2:
 - dropped allmulti field from ALE context

 drivers/net/ethernet/ti/cpsw.c     | 12 +++++++++---
 drivers/net/ethernet/ti/cpsw_ale.c | 19 ++++++++++---------
 drivers/net/ethernet/ti/cpsw_ale.h |  3 +--
 3 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 4a26c72be0cc..071c8aeee2ce 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -793,12 +793,17 @@ static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
 
 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
 {
-	struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
+	struct cpsw_priv *priv = netdev_priv(ndev);
+	struct cpsw_common *cpsw = priv->cpsw;
+	int slave_port = -1;
+
+	if (cpsw->data.dual_emac)
+		slave_port = priv->emac_port + 1;
 
 	if (ndev->flags & IFF_PROMISC) {
 		/* Enable promiscuous mode */
 		cpsw_set_promiscious(ndev, true);
-		cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI);
+		cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, slave_port);
 		return;
 	} else {
 		/* Disable promiscuous mode */
@@ -806,7 +811,8 @@ static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
 	}
 
 	/* Restore allmulti on vlans if necessary */
-	cpsw_ale_set_allmulti(cpsw->ale, ndev->flags & IFF_ALLMULTI);
+	cpsw_ale_set_allmulti(cpsw->ale,
+			      ndev->flags & IFF_ALLMULTI, slave_port);
 
 	/* add/remove mcast address either for real netdev or for vlan */
 	__hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
index 67dc769441ce..f77b5884c8db 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.c
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -468,24 +468,25 @@ int cpsw_ale_del_vlan(struct cpsw_ale *ale, u16 vid, int port_mask)
 	return 0;
 }
 
-void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti)
+void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti, int port)
 {
 	u32 ale_entry[ALE_ENTRY_WORDS];
-	int type, idx;
 	int unreg_mcast = 0;
-
-	/* Only bother doing the work if the setting is actually changing */
-	if (ale->allmulti == allmulti)
-		return;
-
-	/* Remember the new setting to check against next time */
-	ale->allmulti = allmulti;
+	int type, idx;
 
 	for (idx = 0; idx < ale->params.ale_entries; idx++) {
+		int vlan_members;
+
 		cpsw_ale_read(ale, idx, ale_entry);
 		type = cpsw_ale_get_entry_type(ale_entry);
 		if (type != ALE_TYPE_VLAN)
 			continue;
+		vlan_members =
+			cpsw_ale_get_vlan_member_list(ale_entry,
+						      ale->vlan_field_bits);
+
+		if (port != -1 && !(vlan_members & BIT(port)))
+			continue;
 
 		unreg_mcast =
 			cpsw_ale_get_vlan_unreg_mcast(ale_entry,
diff --git a/drivers/net/ethernet/ti/cpsw_ale.h b/drivers/net/ethernet/ti/cpsw_ale.h
index 4777d626fac8..370df254eb12 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.h
+++ b/drivers/net/ethernet/ti/cpsw_ale.h
@@ -30,7 +30,6 @@ struct cpsw_ale {
 	struct cpsw_ale_params	params;
 	struct timer_list	timer;
 	unsigned long		ageout;
-	int			allmulti;
 	u32			version;
 	/* These bits are different on NetCP NU Switch ALE */
 	u32			port_mask_bits;
@@ -109,7 +108,7 @@ int cpsw_ale_del_mcast(struct cpsw_ale *ale, const u8 *addr, int port_mask,
 int cpsw_ale_add_vlan(struct cpsw_ale *ale, u16 vid, int port, int untag,
 			int reg_mcast, int unreg_mcast);
 int cpsw_ale_del_vlan(struct cpsw_ale *ale, u16 vid, int port);
-void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti);
+void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti, int port);
 
 int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control);
 int cpsw_ale_control_set(struct cpsw_ale *ale, int port,
-- 
2.17.1