forked from Minki/linux
net: dsa: felix: support FDB entries on offloaded LAG interfaces
This adds the logic in the Felix DSA driver and Ocelot switch library. For Ocelot switches, the DEST_IDX that is the output of the MAC table lookup is a logical port (equal to physical port, if no LAG is used, or a dynamically allocated number otherwise). The allocation we have in place for LAG IDs is different from DSA's, so we can't use that: - DSA allocates a continuous range of LAG IDs starting from 1 - Ocelot appears to require that physical ports and LAG IDs are in the same space of [0, num_phys_ports), and additionally, ports that aren't in a LAG must have physical port id == logical port id The implication is that an FDB entry towards a LAG might need to be deleted and reinstalled when the LAG ID changes. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vladimir Oltean
Jakub Kicinski
parent
e212fa7c54
commit
961d8b6990
@ -614,6 +614,22 @@ static int felix_fdb_del(struct dsa_switch *ds, int port,
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return ocelot_fdb_del(ocelot, port, addr, vid);
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}
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static int felix_lag_fdb_add(struct dsa_switch *ds, struct dsa_lag lag,
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const unsigned char *addr, u16 vid)
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{
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struct ocelot *ocelot = ds->priv;
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return ocelot_lag_fdb_add(ocelot, lag.dev, addr, vid);
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}
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static int felix_lag_fdb_del(struct dsa_switch *ds, struct dsa_lag lag,
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const unsigned char *addr, u16 vid)
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{
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struct ocelot *ocelot = ds->priv;
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return ocelot_lag_fdb_del(ocelot, lag.dev, addr, vid);
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}
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static int felix_mdb_add(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_mdb *mdb)
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{
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@ -1579,6 +1595,8 @@ const struct dsa_switch_ops felix_switch_ops = {
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.port_fdb_dump = felix_fdb_dump,
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.port_fdb_add = felix_fdb_add,
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.port_fdb_del = felix_fdb_del,
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.lag_fdb_add = felix_lag_fdb_add,
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.lag_fdb_del = felix_lag_fdb_del,
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.port_mdb_add = felix_mdb_add,
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.port_mdb_del = felix_mdb_del,
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.port_pre_bridge_flags = felix_pre_bridge_flags,
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@ -1907,6 +1907,8 @@ static u32 ocelot_get_bond_mask(struct ocelot *ocelot, struct net_device *bond)
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u32 mask = 0;
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int port;
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lockdep_assert_held(&ocelot->fwd_domain_lock);
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for (port = 0; port < ocelot->num_phys_ports; port++) {
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struct ocelot_port *ocelot_port = ocelot->ports[port];
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@ -1920,6 +1922,19 @@ static u32 ocelot_get_bond_mask(struct ocelot *ocelot, struct net_device *bond)
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return mask;
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}
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/* The logical port number of a LAG is equal to the lowest numbered physical
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* port ID present in that LAG. It may change if that port ever leaves the LAG.
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*/
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static int ocelot_bond_get_id(struct ocelot *ocelot, struct net_device *bond)
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{
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int bond_mask = ocelot_get_bond_mask(ocelot, bond);
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if (!bond_mask)
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return -ENOENT;
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return __ffs(bond_mask);
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}
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u32 ocelot_get_bridge_fwd_mask(struct ocelot *ocelot, int src_port)
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{
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struct ocelot_port *ocelot_port = ocelot->ports[src_port];
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@ -2413,7 +2428,7 @@ static void ocelot_setup_logical_port_ids(struct ocelot *ocelot)
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bond = ocelot_port->bond;
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if (bond) {
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int lag = __ffs(ocelot_get_bond_mask(ocelot, bond));
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int lag = ocelot_bond_get_id(ocelot, bond);
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ocelot_rmw_gix(ocelot,
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ANA_PORT_PORT_CFG_PORTID_VAL(lag),
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@ -2428,6 +2443,46 @@ static void ocelot_setup_logical_port_ids(struct ocelot *ocelot)
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}
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}
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/* Documentation for PORTID_VAL says:
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* Logical port number for front port. If port is not a member of a LLAG,
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* then PORTID must be set to the physical port number.
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* If port is a member of a LLAG, then PORTID must be set to the common
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* PORTID_VAL used for all member ports of the LLAG.
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* The value must not exceed the number of physical ports on the device.
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*
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* This means we have little choice but to migrate FDB entries pointing towards
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* a logical port when that changes.
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*/
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static void ocelot_migrate_lag_fdbs(struct ocelot *ocelot,
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struct net_device *bond,
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int lag)
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{
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struct ocelot_lag_fdb *fdb;
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int err;
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lockdep_assert_held(&ocelot->fwd_domain_lock);
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list_for_each_entry(fdb, &ocelot->lag_fdbs, list) {
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if (fdb->bond != bond)
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continue;
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err = ocelot_mact_forget(ocelot, fdb->addr, fdb->vid);
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if (err) {
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dev_err(ocelot->dev,
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"failed to delete LAG %s FDB %pM vid %d: %pe\n",
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bond->name, fdb->addr, fdb->vid, ERR_PTR(err));
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}
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err = ocelot_mact_learn(ocelot, lag, fdb->addr, fdb->vid,
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ENTRYTYPE_LOCKED);
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if (err) {
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dev_err(ocelot->dev,
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"failed to migrate LAG %s FDB %pM vid %d: %pe\n",
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bond->name, fdb->addr, fdb->vid, ERR_PTR(err));
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}
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}
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}
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int ocelot_port_lag_join(struct ocelot *ocelot, int port,
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struct net_device *bond,
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struct netdev_lag_upper_info *info)
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@ -2452,14 +2507,23 @@ EXPORT_SYMBOL(ocelot_port_lag_join);
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void ocelot_port_lag_leave(struct ocelot *ocelot, int port,
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struct net_device *bond)
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{
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int old_lag_id, new_lag_id;
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mutex_lock(&ocelot->fwd_domain_lock);
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old_lag_id = ocelot_bond_get_id(ocelot, bond);
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ocelot->ports[port]->bond = NULL;
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ocelot_setup_logical_port_ids(ocelot);
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ocelot_apply_bridge_fwd_mask(ocelot, false);
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ocelot_set_aggr_pgids(ocelot);
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new_lag_id = ocelot_bond_get_id(ocelot, bond);
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if (new_lag_id >= 0 && old_lag_id != new_lag_id)
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ocelot_migrate_lag_fdbs(ocelot, bond, new_lag_id);
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mutex_unlock(&ocelot->fwd_domain_lock);
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}
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EXPORT_SYMBOL(ocelot_port_lag_leave);
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@ -2468,13 +2532,74 @@ void ocelot_port_lag_change(struct ocelot *ocelot, int port, bool lag_tx_active)
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{
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struct ocelot_port *ocelot_port = ocelot->ports[port];
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mutex_lock(&ocelot->fwd_domain_lock);
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ocelot_port->lag_tx_active = lag_tx_active;
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/* Rebalance the LAGs */
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ocelot_set_aggr_pgids(ocelot);
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mutex_unlock(&ocelot->fwd_domain_lock);
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}
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EXPORT_SYMBOL(ocelot_port_lag_change);
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int ocelot_lag_fdb_add(struct ocelot *ocelot, struct net_device *bond,
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const unsigned char *addr, u16 vid)
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{
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struct ocelot_lag_fdb *fdb;
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int lag, err;
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fdb = kzalloc(sizeof(*fdb), GFP_KERNEL);
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if (!fdb)
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return -ENOMEM;
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ether_addr_copy(fdb->addr, addr);
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fdb->vid = vid;
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fdb->bond = bond;
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mutex_lock(&ocelot->fwd_domain_lock);
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lag = ocelot_bond_get_id(ocelot, bond);
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err = ocelot_mact_learn(ocelot, lag, addr, vid, ENTRYTYPE_LOCKED);
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if (err) {
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mutex_unlock(&ocelot->fwd_domain_lock);
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kfree(fdb);
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return err;
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}
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list_add_tail(&fdb->list, &ocelot->lag_fdbs);
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mutex_unlock(&ocelot->fwd_domain_lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocelot_lag_fdb_add);
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int ocelot_lag_fdb_del(struct ocelot *ocelot, struct net_device *bond,
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const unsigned char *addr, u16 vid)
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{
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struct ocelot_lag_fdb *fdb, *tmp;
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mutex_lock(&ocelot->fwd_domain_lock);
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list_for_each_entry_safe(fdb, tmp, &ocelot->lag_fdbs, list) {
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if (!ether_addr_equal(fdb->addr, addr) || fdb->vid != vid ||
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fdb->bond != bond)
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continue;
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ocelot_mact_forget(ocelot, addr, vid);
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list_del(&fdb->list);
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mutex_unlock(&ocelot->fwd_domain_lock);
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kfree(fdb);
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return 0;
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}
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mutex_unlock(&ocelot->fwd_domain_lock);
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return -ENOENT;
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}
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EXPORT_SYMBOL_GPL(ocelot_lag_fdb_del);
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/* Configure the maximum SDU (L2 payload) on RX to the value specified in @sdu.
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* The length of VLAN tags is accounted for automatically via DEV_MAC_TAGS_CFG.
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* In the special case that it's the NPI port that we're configuring, the
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@ -2769,6 +2894,7 @@ int ocelot_init(struct ocelot *ocelot)
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INIT_LIST_HEAD(&ocelot->multicast);
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INIT_LIST_HEAD(&ocelot->pgids);
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INIT_LIST_HEAD(&ocelot->vlans);
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INIT_LIST_HEAD(&ocelot->lag_fdbs);
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ocelot_detect_features(ocelot);
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ocelot_mact_init(ocelot);
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ocelot_vlan_init(ocelot);
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@ -635,6 +635,13 @@ enum macaccess_entry_type {
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#define OCELOT_QUIRK_PCS_PERFORMS_RATE_ADAPTATION BIT(0)
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#define OCELOT_QUIRK_QSGMII_PORTS_MUST_BE_UP BIT(1)
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struct ocelot_lag_fdb {
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unsigned char addr[ETH_ALEN];
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u16 vid;
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struct net_device *bond;
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struct list_head list;
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};
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struct ocelot_port {
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struct ocelot *ocelot;
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@ -690,6 +697,7 @@ struct ocelot {
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struct list_head vlans;
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struct list_head traps;
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struct list_head lag_fdbs;
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/* Switches like VSC9959 have flooding per traffic class */
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int num_flooding_pgids;
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@ -866,6 +874,10 @@ int ocelot_fdb_add(struct ocelot *ocelot, int port,
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const unsigned char *addr, u16 vid);
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int ocelot_fdb_del(struct ocelot *ocelot, int port,
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const unsigned char *addr, u16 vid);
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int ocelot_lag_fdb_add(struct ocelot *ocelot, struct net_device *bond,
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const unsigned char *addr, u16 vid);
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int ocelot_lag_fdb_del(struct ocelot *ocelot, struct net_device *bond,
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const unsigned char *addr, u16 vid);
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int ocelot_vlan_prepare(struct ocelot *ocelot, int port, u16 vid, bool pvid,
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bool untagged, struct netlink_ext_ack *extack);
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int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
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