linux-kernel - [PATCH net-next 3/5] net: dsa: mv88e6xxx: call vtu

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Date:   Thu,  1 Aug 2019 14:36:35 -0400
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linux-kernel@...r.kernel.org,
        Vivien Didelot <vivien.didelot@...il.com>,
        Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        f.fainelli@...il.com, andrew@...n.ch, netdev@...r.kernel.org,
        davem@...emloft.net
Subject: [PATCH net-next 3/5] net: dsa: mv88e6xxx: call vtu_getnext directly in db load/purge

mv88e6xxx_vtu_getnext is simple enough to call it directly in the
mv88e6xxx_port_db_load_purge function and explicit the return code
expected by switchdev for software VLANs when an hardware VLAN does
not exist.

Signed-off-by: Vivien Didelot <vivien.didelot@...il.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index c825fa3477fa..42ab57dbc790 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1540,23 +1540,36 @@ static int mv88e6xxx_port_db_load_purge(struct mv88e6xxx_chip *chip, int port,
 					const unsigned char *addr, u16 vid,
 					u8 state)
 {
-	struct mv88e6xxx_vtu_entry vlan;
 	struct mv88e6xxx_atu_entry entry;
+	struct mv88e6xxx_vtu_entry vlan;
+	u16 fid;
 	int err;
 
 	/* Null VLAN ID corresponds to the port private database */
-	if (vid == 0)
-		err = mv88e6xxx_port_get_fid(chip, port, &vlan.fid);
-	else
-		err = mv88e6xxx_vtu_get(chip, vid, &vlan, false);
-	if (err)
-		return err;
+	if (vid == 0) {
+		err = mv88e6xxx_port_get_fid(chip, port, &fid);
+		if (err)
+			return err;
+	} else {
+		vlan.vid = vid - 1;
+		vlan.valid = false;
+
+		err = mv88e6xxx_vtu_getnext(chip, &vlan);
+		if (err)
+			return err;
+
+		/* switchdev expects -EOPNOTSUPP to honor software VLANs */
+		if (vlan.vid != vid || !vlan.valid)
+			return -EOPNOTSUPP;
+
+		fid = vlan.fid;
+	}
 
 	entry.state = MV88E6XXX_G1_ATU_DATA_STATE_UNUSED;
 	ether_addr_copy(entry.mac, addr);
 	eth_addr_dec(entry.mac);
 
-	err = mv88e6xxx_g1_atu_getnext(chip, vlan.fid, &entry);
+	err = mv88e6xxx_g1_atu_getnext(chip, fid, &entry);
 	if (err)
 		return err;
 
@@ -1577,7 +1590,7 @@ static int mv88e6xxx_port_db_load_purge(struct mv88e6xxx_chip *chip, int port,
 		entry.state = state;
 	}
 
-	return mv88e6xxx_g1_atu_loadpurge(chip, vlan.fid, &entry);
+	return mv88e6xxx_g1_atu_loadpurge(chip, fid, &entry);
 }
 
 static int mv88e6xxx_port_add_broadcast(struct mv88e6xxx_chip *chip, int port,
-- 
2.22.0