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authorVivien Didelot <vivien.didelot@savoirfairelinux.com>2015-08-13 16:52:17 (GMT)
committerDavid S. Miller <davem@davemloft.net>2015-08-14 04:31:12 (GMT)
commit111495361598205967f1be4e07d4726b0f762d60 (patch)
tree55f2a584cbd0811e64ccce8e904e67c33902db58 /net/dsa
parent35103d11173b8fea874183f8aa508ae71234d299 (diff)
net: dsa: add support for switchdev VLAN objects
Add new functions in DSA drivers to access hardware VLAN entries through SWITCHDEV_OBJ_PORT_VLAN objects: - port_pvid_get() and vlan_getnext() to dump a VLAN - port_vlan_del() to exclude a port from a VLAN - port_pvid_set() and port_vlan_add() to join a port to a VLAN The DSA infrastructure will ensure that each VLAN of the given range does not already belong to another bridge. If it does, it will fallback to software VLAN and won't program the hardware. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/slave.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index aa0266f..373ff31 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -200,6 +200,152 @@ out:
return 0;
}
+static int dsa_bridge_check_vlan_range(struct dsa_switch *ds,
+ const struct net_device *bridge,
+ u16 vid_begin, u16 vid_end)
+{
+ struct dsa_slave_priv *p;
+ struct net_device *dev, *vlan_br;
+ DECLARE_BITMAP(members, DSA_MAX_PORTS);
+ DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
+ u16 vid;
+ int member, err;
+
+ if (!ds->drv->vlan_getnext || !vid_begin)
+ return -EOPNOTSUPP;
+
+ vid = vid_begin - 1;
+
+ do {
+ err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
+ if (err)
+ break;
+
+ if (vid > vid_end)
+ break;
+
+ member = find_first_bit(members, DSA_MAX_PORTS);
+ if (member == DSA_MAX_PORTS)
+ continue;
+
+ dev = ds->ports[member];
+ p = netdev_priv(dev);
+ vlan_br = p->bridge_dev;
+ if (vlan_br == bridge)
+ continue;
+
+ netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
+ return -EOPNOTSUPP;
+ } while (vid < vid_end);
+
+ return err == -ENOENT ? 0 : err;
+}
+
+static int dsa_slave_port_vlan_add(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ struct switchdev_obj_vlan *vlan = &obj->u.vlan;
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ u16 vid;
+ int err;
+
+ switch (obj->trans) {
+ case SWITCHDEV_TRANS_PREPARE:
+ if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set)
+ return -EOPNOTSUPP;
+
+ /* If the requested port doesn't belong to the same bridge as
+ * the VLAN members, fallback to software VLAN (hopefully).
+ */
+ err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
+ vlan->vid_begin,
+ vlan->vid_end);
+ if (err)
+ return err;
+ break;
+ case SWITCHDEV_TRANS_COMMIT:
+ for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
+ err = ds->drv->port_vlan_add(ds, p->port, vid,
+ vlan->flags &
+ BRIDGE_VLAN_INFO_UNTAGGED);
+ if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
+ err = ds->drv->port_pvid_set(ds, p->port, vid);
+ if (err)
+ return err;
+ }
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int dsa_slave_port_vlan_del(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ struct switchdev_obj_vlan *vlan = &obj->u.vlan;
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ u16 vid;
+ int err;
+
+ if (!ds->drv->port_vlan_del)
+ return -EOPNOTSUPP;
+
+ for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
+ err = ds->drv->port_vlan_del(ds, p->port, vid);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int dsa_slave_port_vlan_dump(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ struct switchdev_obj_vlan *vlan = &obj->u.vlan;
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ DECLARE_BITMAP(members, DSA_MAX_PORTS);
+ DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
+ u16 pvid, vid = 0;
+ int err;
+
+ if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
+ return -EOPNOTSUPP;
+
+ err = ds->drv->port_pvid_get(ds, p->port, &pvid);
+ if (err)
+ return err;
+
+ for (;;) {
+ err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
+ if (err)
+ break;
+
+ if (!test_bit(p->port, members))
+ continue;
+
+ memset(vlan, 0, sizeof(*vlan));
+ vlan->vid_begin = vlan->vid_end = vid;
+
+ if (vid == pvid)
+ vlan->flags |= BRIDGE_VLAN_INFO_PVID;
+
+ if (test_bit(p->port, untagged))
+ vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+ err = obj->cb(dev, obj);
+ if (err)
+ break;
+ }
+
+ return err == -ENOENT ? 0 : err;
+}
+
static int dsa_slave_port_fdb_add(struct net_device *dev,
struct switchdev_obj *obj)
{
@@ -341,6 +487,9 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
case SWITCHDEV_OBJ_PORT_FDB:
err = dsa_slave_port_fdb_add(dev, obj);
break;
+ case SWITCHDEV_OBJ_PORT_VLAN:
+ err = dsa_slave_port_vlan_add(dev, obj);
+ break;
default:
err = -EOPNOTSUPP;
break;
@@ -358,6 +507,9 @@ static int dsa_slave_port_obj_del(struct net_device *dev,
case SWITCHDEV_OBJ_PORT_FDB:
err = dsa_slave_port_fdb_del(dev, obj);
break;
+ case SWITCHDEV_OBJ_PORT_VLAN:
+ err = dsa_slave_port_vlan_del(dev, obj);
+ break;
default:
err = -EOPNOTSUPP;
break;
@@ -375,6 +527,9 @@ static int dsa_slave_port_obj_dump(struct net_device *dev,
case SWITCHDEV_OBJ_PORT_FDB:
err = dsa_slave_port_fdb_dump(dev, obj);
break;
+ case SWITCHDEV_OBJ_PORT_VLAN:
+ err = dsa_slave_port_vlan_dump(dev, obj);
+ break;
default:
err = -EOPNOTSUPP;
break;
@@ -794,6 +949,9 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
.ndo_poll_controller = dsa_slave_poll_controller,
#endif
+ .ndo_bridge_getlink = switchdev_port_bridge_getlink,
+ .ndo_bridge_setlink = switchdev_port_bridge_setlink,
+ .ndo_bridge_dellink = switchdev_port_bridge_dellink,
};
static const struct switchdev_ops dsa_slave_switchdev_ops = {

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