net: dsa: add cross-chip multicast support
Similarly to how cross-chip VLAN works, define a bitmap of multicast group members for a switch, now including its DSA ports, so that multicast traffic can be sent to all switches of the fabric. A switch may drop the frames if no user port is a member. This brings support for multicast in a multi-chip environment. As of now, all switches of the fabric must support the multicast operations in order to program a single fabric port. Reported-by: Jason Cobham <jcobham@questertangent.com> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Tested-by: Jason Cobham <jcobham@questertangent.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -122,19 +122,30 @@ static int dsa_switch_mdb_add(struct dsa_switch *ds,
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{
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{
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const struct switchdev_obj_port_mdb *mdb = info->mdb;
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const struct switchdev_obj_port_mdb *mdb = info->mdb;
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struct switchdev_trans *trans = info->trans;
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struct switchdev_trans *trans = info->trans;
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DECLARE_BITMAP(group, ds->num_ports);
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int port, err;
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/* Do not care yet about other switch chips of the fabric */
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/* Build a mask of Multicast group members */
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if (ds->index != info->sw_index)
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bitmap_zero(group, ds->num_ports);
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return 0;
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if (ds->index == info->sw_index)
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set_bit(info->port, group);
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for (port = 0; port < ds->num_ports; port++)
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if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
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set_bit(port, group);
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if (switchdev_trans_ph_prepare(trans)) {
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if (switchdev_trans_ph_prepare(trans)) {
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if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
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if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
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return -EOPNOTSUPP;
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return -EOPNOTSUPP;
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return ds->ops->port_mdb_prepare(ds, info->port, mdb, trans);
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for_each_set_bit(port, group, ds->num_ports) {
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err = ds->ops->port_mdb_prepare(ds, port, mdb, trans);
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if (err)
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return err;
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}
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}
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}
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ds->ops->port_mdb_add(ds, info->port, mdb, trans);
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for_each_set_bit(port, group, ds->num_ports)
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ds->ops->port_mdb_add(ds, port, mdb, trans);
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return 0;
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return 0;
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}
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}
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@ -144,14 +155,13 @@ static int dsa_switch_mdb_del(struct dsa_switch *ds,
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{
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{
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const struct switchdev_obj_port_mdb *mdb = info->mdb;
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const struct switchdev_obj_port_mdb *mdb = info->mdb;
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/* Do not care yet about other switch chips of the fabric */
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if (ds->index != info->sw_index)
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return 0;
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if (!ds->ops->port_mdb_del)
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if (!ds->ops->port_mdb_del)
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return -EOPNOTSUPP;
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return -EOPNOTSUPP;
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if (ds->index == info->sw_index)
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return ds->ops->port_mdb_del(ds, info->port, mdb);
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return ds->ops->port_mdb_del(ds, info->port, mdb);
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return 0;
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}
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}
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static int dsa_switch_vlan_add(struct dsa_switch *ds,
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static int dsa_switch_vlan_add(struct dsa_switch *ds,
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