net: dsa: add port_fdb_prepare

Push the prepare phase for FDB operations down to the DSA drivers, with
a new port_fdb_prepare function. Currently only mv88e6xxx is affected.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/mv88e6171.c b/drivers/net/dsa/mv88e6171.c
index c95cfab..ca3330a 100644 (file)
--- a/drivers/net/dsa/mv88e6171.c
+++ b/drivers/net/dsa/mv88e6171.c
@@ -121,6 +121,7 @@ struct dsa_switch_driver mv88e6171_switch_driver = {
        .port_vlan_add          = mv88e6xxx_port_vlan_add,
        .port_vlan_del          = mv88e6xxx_port_vlan_del,
        .vlan_getnext           = mv88e6xxx_vlan_getnext,
+       .port_fdb_prepare       = mv88e6xxx_port_fdb_prepare,
        .port_fdb_add           = mv88e6xxx_port_fdb_add,
        .port_fdb_del           = mv88e6xxx_port_fdb_del,
        .port_fdb_getnext       = mv88e6xxx_port_fdb_getnext,

diff --git a/drivers/net/dsa/mv88e6352.c b/drivers/net/dsa/mv88e6352.c
index 3736706..078a358 100644 (file)
--- a/drivers/net/dsa/mv88e6352.c
+++ b/drivers/net/dsa/mv88e6352.c
@@ -348,6 +348,7 @@ struct dsa_switch_driver mv88e6352_switch_driver = {
        .port_vlan_add          = mv88e6xxx_port_vlan_add,
        .port_vlan_del          = mv88e6xxx_port_vlan_del,
        .vlan_getnext           = mv88e6xxx_vlan_getnext,
+       .port_fdb_prepare       = mv88e6xxx_port_fdb_prepare,
        .port_fdb_add           = mv88e6xxx_port_fdb_add,
        .port_fdb_del           = mv88e6xxx_port_fdb_del,
        .port_fdb_getnext       = mv88e6xxx_port_fdb_getnext,

diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 8e088e3..0da8651 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -1841,6 +1841,16 @@ static int _mv88e6xxx_port_fdb_load(struct dsa_switch *ds, int port,
        return _mv88e6xxx_atu_load(ds, &entry);
 }
 
+int mv88e6xxx_port_fdb_prepare(struct dsa_switch *ds, int port,
+                              const struct switchdev_obj_port_fdb *fdb,
+                              struct switchdev_trans *trans)
+{
+       /* We don't need any dynamic resource from the kernel (yet),
+        * so skip the prepare phase.
+        */
+       return 0;
+}
+
 int mv88e6xxx_port_fdb_add(struct dsa_switch *ds, int port,
                           const unsigned char *addr, u16 vid)
 {

diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h
index d8ec487..3042869 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx.h
@@ -474,6 +474,9 @@ int mv88e6xxx_port_vlan_add(struct dsa_switch *ds, int port, u16 vid,
 int mv88e6xxx_port_vlan_del(struct dsa_switch *ds, int port, u16 vid);
 int mv88e6xxx_vlan_getnext(struct dsa_switch *ds, u16 *vid,
                           unsigned long *ports, unsigned long *untagged);
+int mv88e6xxx_port_fdb_prepare(struct dsa_switch *ds, int port,
+                              const struct switchdev_obj_port_fdb *fdb,
+                              struct switchdev_trans *trans);
 int mv88e6xxx_port_fdb_add(struct dsa_switch *ds, int port,
                           const unsigned char *addr, u16 vid);
 int mv88e6xxx_port_fdb_del(struct dsa_switch *ds, int port,

diff --git a/include/net/dsa.h b/include/net/dsa.h
index b34d812..4f66f84 100644 (file)
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -197,6 +197,9 @@ static inline u8 dsa_upstream_port(struct dsa_switch *ds)
                return ds->pd->rtable[dst->cpu_switch];
 }
 
+struct switchdev_trans;
+struct switchdev_obj_port_fdb;
+
 struct dsa_switch_driver {
        struct list_head        list;
 
@@ -316,6 +319,9 @@ struct dsa_switch_driver {
        /*
         * Forwarding database
         */
+       int     (*port_fdb_prepare)(struct dsa_switch *ds, int port,
+                                   const struct switchdev_obj_port_fdb *fdb,
+                                   struct switchdev_trans *trans);
        int     (*port_fdb_add)(struct dsa_switch *ds, int port,
                                const unsigned char *addr, u16 vid);
        int     (*port_fdb_del)(struct dsa_switch *ds, int port,

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 4f607bc..48e8c15 100644 (file)
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -346,10 +346,13 @@ static int dsa_slave_port_fdb_add(struct net_device *dev,
 {
        struct dsa_slave_priv *p = netdev_priv(dev);
        struct dsa_switch *ds = p->parent;
-       int ret = -EOPNOTSUPP;
+       int ret;
+
+       if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
+               return -EOPNOTSUPP;
 
        if (switchdev_trans_ph_prepare(trans))
-               ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
+               ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
        else
                ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid);