2 * Handling of a single switch port
4 * Copyright (c) 2017 Savoir-faire Linux Inc.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
13 #include <linux/if_bridge.h>
14 #include <linux/notifier.h>
15 #include <linux/of_mdio.h>
16 #include <linux/of_net.h>
20 static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
22 struct raw_notifier_head *nh = &dp->ds->dst->nh;
25 err = raw_notifier_call_chain(nh, e, v);
27 return notifier_to_errno(err);
30 int dsa_port_set_state(struct dsa_port *dp, u8 state,
31 struct switchdev_trans *trans)
33 struct dsa_switch *ds = dp->ds;
36 if (switchdev_trans_ph_prepare(trans))
37 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
39 if (ds->ops->port_stp_state_set)
40 ds->ops->port_stp_state_set(ds, port, state);
42 if (ds->ops->port_fast_age) {
43 /* Fast age FDB entries or flush appropriate forwarding database
44 * for the given port, if we are moving it from Learning or
45 * Forwarding state, to Disabled or Blocking or Listening state.
48 if ((dp->stp_state == BR_STATE_LEARNING ||
49 dp->stp_state == BR_STATE_FORWARDING) &&
50 (state == BR_STATE_DISABLED ||
51 state == BR_STATE_BLOCKING ||
52 state == BR_STATE_LISTENING))
53 ds->ops->port_fast_age(ds, port);
56 dp->stp_state = state;
61 static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
65 err = dsa_port_set_state(dp, state, NULL);
67 pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
70 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
72 struct dsa_switch *ds = dp->ds;
76 if (ds->ops->port_enable) {
77 err = ds->ops->port_enable(ds, port, phy);
83 dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
88 void dsa_port_disable(struct dsa_port *dp, struct phy_device *phy)
90 struct dsa_switch *ds = dp->ds;
94 dsa_port_set_state_now(dp, BR_STATE_DISABLED);
96 if (ds->ops->port_disable)
97 ds->ops->port_disable(ds, port, phy);
100 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br)
102 struct dsa_notifier_bridge_info info = {
103 .sw_index = dp->ds->index,
109 /* Here the port is already bridged. Reflect the current configuration
110 * so that drivers can program their chips accordingly.
114 err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);
116 /* The bridging is rolled back on error */
118 dp->bridge_dev = NULL;
123 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
125 struct dsa_notifier_bridge_info info = {
126 .sw_index = dp->ds->index,
132 /* Here the port is already unbridged. Reflect the current configuration
133 * so that drivers can program their chips accordingly.
135 dp->bridge_dev = NULL;
137 err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
139 pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
141 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
142 * so allow it to be in BR_STATE_FORWARDING to be kept functional
144 dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
147 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
148 struct switchdev_trans *trans)
150 struct dsa_switch *ds = dp->ds;
152 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
153 if (switchdev_trans_ph_prepare(trans))
156 if (ds->ops->port_vlan_filtering)
157 return ds->ops->port_vlan_filtering(ds, dp->index,
163 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
164 struct switchdev_trans *trans)
166 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
167 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
168 struct dsa_notifier_ageing_time_info info = {
169 .ageing_time = ageing_time,
173 if (switchdev_trans_ph_prepare(trans))
174 return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
176 dp->ageing_time = ageing_time;
178 return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
181 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
184 struct dsa_notifier_fdb_info info = {
185 .sw_index = dp->ds->index,
191 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
194 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
197 struct dsa_notifier_fdb_info info = {
198 .sw_index = dp->ds->index,
205 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
208 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
210 struct dsa_switch *ds = dp->ds;
211 int port = dp->index;
213 if (!ds->ops->port_fdb_dump)
216 return ds->ops->port_fdb_dump(ds, port, cb, data);
219 int dsa_port_mdb_add(const struct dsa_port *dp,
220 const struct switchdev_obj_port_mdb *mdb,
221 struct switchdev_trans *trans)
223 struct dsa_notifier_mdb_info info = {
224 .sw_index = dp->ds->index,
230 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
233 int dsa_port_mdb_del(const struct dsa_port *dp,
234 const struct switchdev_obj_port_mdb *mdb)
236 struct dsa_notifier_mdb_info info = {
237 .sw_index = dp->ds->index,
242 return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
245 int dsa_port_vlan_add(struct dsa_port *dp,
246 const struct switchdev_obj_port_vlan *vlan,
247 struct switchdev_trans *trans)
249 struct dsa_notifier_vlan_info info = {
250 .sw_index = dp->ds->index,
256 if (br_vlan_enabled(dp->bridge_dev))
257 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
262 int dsa_port_vlan_del(struct dsa_port *dp,
263 const struct switchdev_obj_port_vlan *vlan)
265 struct dsa_notifier_vlan_info info = {
266 .sw_index = dp->ds->index,
271 if (netif_is_bridge_master(vlan->obj.orig_dev))
274 if (br_vlan_enabled(dp->bridge_dev))
275 return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
280 static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
282 struct device_node *phy_dn;
283 struct phy_device *phydev;
285 phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
289 phydev = of_phy_find_device(phy_dn);
292 return ERR_PTR(-EPROBE_DEFER);
299 static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
301 struct dsa_switch *ds = dp->ds;
302 struct phy_device *phydev;
303 int port = dp->index;
306 phydev = dsa_port_get_phy_device(dp);
311 return PTR_ERR(phydev);
314 err = genphy_config_init(phydev);
318 err = genphy_resume(phydev);
322 err = genphy_read_status(phydev);
326 err = genphy_suspend(phydev);
331 if (ds->ops->adjust_link)
332 ds->ops->adjust_link(ds, port, phydev);
334 dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
337 put_device(&phydev->mdio.dev);
341 static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
343 struct device_node *dn = dp->dn;
344 struct dsa_switch *ds = dp->ds;
345 struct phy_device *phydev;
346 int port = dp->index;
350 err = of_phy_register_fixed_link(dn);
353 "failed to register the fixed PHY of port %d\n",
358 phydev = of_phy_find_device(dn);
360 mode = of_get_phy_mode(dn);
362 mode = PHY_INTERFACE_MODE_NA;
363 phydev->interface = mode;
365 genphy_config_init(phydev);
366 genphy_read_status(phydev);
368 if (ds->ops->adjust_link)
369 ds->ops->adjust_link(ds, port, phydev);
371 put_device(&phydev->mdio.dev);
376 int dsa_port_link_register_of(struct dsa_port *dp)
378 if (of_phy_is_fixed_link(dp->dn))
379 return dsa_port_fixed_link_register_of(dp);
381 return dsa_port_setup_phy_of(dp, true);
384 void dsa_port_link_unregister_of(struct dsa_port *dp)
386 if (of_phy_is_fixed_link(dp->dn))
387 of_phy_deregister_fixed_link(dp->dn);
389 dsa_port_setup_phy_of(dp, false);
392 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
394 struct phy_device *phydev;
395 int ret = -EOPNOTSUPP;
397 if (of_phy_is_fixed_link(dp->dn))
400 phydev = dsa_port_get_phy_device(dp);
401 if (IS_ERR_OR_NULL(phydev))
404 ret = phy_ethtool_get_strings(phydev, data);
405 put_device(&phydev->mdio.dev);
409 EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
411 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
413 struct phy_device *phydev;
414 int ret = -EOPNOTSUPP;
416 if (of_phy_is_fixed_link(dp->dn))
419 phydev = dsa_port_get_phy_device(dp);
420 if (IS_ERR_OR_NULL(phydev))
423 ret = phy_ethtool_get_stats(phydev, NULL, data);
424 put_device(&phydev->mdio.dev);
428 EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
430 int dsa_port_get_phy_sset_count(struct dsa_port *dp)
432 struct phy_device *phydev;
433 int ret = -EOPNOTSUPP;
435 if (of_phy_is_fixed_link(dp->dn))
438 phydev = dsa_port_get_phy_device(dp);
439 if (IS_ERR_OR_NULL(phydev))
442 ret = phy_ethtool_get_sset_count(phydev);
443 put_device(&phydev->mdio.dev);
447 EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);