ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/net/dsa/port.c b/marvell/linux/net/dsa/port.c
new file mode 100644
index 0000000..14872a9
--- /dev/null
+++ b/marvell/linux/net/dsa/port.c
@@ -0,0 +1,758 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Handling of a single switch port
+ *
+ * Copyright (c) 2017 Savoir-faire Linux Inc.
+ * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
+ */
+
+#include <linux/if_bridge.h>
+#include <linux/notifier.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+
+#include "dsa_priv.h"
+
+static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
+{
+ struct raw_notifier_head *nh = &dp->ds->dst->nh;
+ int err;
+
+ err = raw_notifier_call_chain(nh, e, v);
+
+ return notifier_to_errno(err);
+}
+
+int dsa_port_set_state(struct dsa_port *dp, u8 state,
+ struct switchdev_trans *trans)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (switchdev_trans_ph_prepare(trans))
+ return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
+
+ if (ds->ops->port_stp_state_set)
+ ds->ops->port_stp_state_set(ds, port, state);
+
+ if (ds->ops->port_fast_age) {
+ /* Fast age FDB entries or flush appropriate forwarding database
+ * for the given port, if we are moving it from Learning or
+ * Forwarding state, to Disabled or Blocking or Listening state.
+ */
+
+ if ((dp->stp_state == BR_STATE_LEARNING ||
+ dp->stp_state == BR_STATE_FORWARDING) &&
+ (state == BR_STATE_DISABLED ||
+ state == BR_STATE_BLOCKING ||
+ state == BR_STATE_LISTENING))
+ ds->ops->port_fast_age(ds, port);
+ }
+
+ dp->stp_state = state;
+
+ return 0;
+}
+
+static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
+{
+ int err;
+
+ err = dsa_port_set_state(dp, state, NULL);
+ if (err)
+ pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
+}
+
+int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+ int err;
+
+ if (ds->ops->port_enable) {
+ err = ds->ops->port_enable(ds, port, phy);
+ if (err)
+ return err;
+ }
+
+ if (!dp->bridge_dev)
+ dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
+
+ if (dp->pl)
+ phylink_start(dp->pl);
+
+ return 0;
+}
+
+int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
+{
+ int err;
+
+ rtnl_lock();
+ err = dsa_port_enable_rt(dp, phy);
+ rtnl_unlock();
+
+ return err;
+}
+
+void dsa_port_disable_rt(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (dp->pl)
+ phylink_stop(dp->pl);
+
+ if (!dp->bridge_dev)
+ dsa_port_set_state_now(dp, BR_STATE_DISABLED);
+
+ if (ds->ops->port_disable)
+ ds->ops->port_disable(ds, port);
+}
+
+void dsa_port_disable(struct dsa_port *dp)
+{
+ rtnl_lock();
+ dsa_port_disable_rt(dp);
+ rtnl_unlock();
+}
+
+int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br)
+{
+ struct dsa_notifier_bridge_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .br = br,
+ };
+ int err;
+
+ /* Set the flooding mode before joining the port in the switch */
+ err = dsa_port_bridge_flags(dp, BR_FLOOD | BR_MCAST_FLOOD, NULL);
+ if (err)
+ return err;
+
+ /* Here the interface is already bridged. Reflect the current
+ * configuration so that drivers can program their chips accordingly.
+ */
+ dp->bridge_dev = br;
+
+ err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);
+
+ /* The bridging is rolled back on error */
+ if (err) {
+ dsa_port_bridge_flags(dp, 0, NULL);
+ dp->bridge_dev = NULL;
+ }
+
+ return err;
+}
+
+void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
+{
+ struct dsa_notifier_bridge_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .br = br,
+ };
+ int err;
+
+ /* Here the port is already unbridged. Reflect the current configuration
+ * so that drivers can program their chips accordingly.
+ */
+ dp->bridge_dev = NULL;
+
+ err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
+ if (err)
+ pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
+
+ /* Port is leaving the bridge, disable flooding */
+ dsa_port_bridge_flags(dp, 0, NULL);
+
+ /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
+ * so allow it to be in BR_STATE_FORWARDING to be kept functional
+ */
+ dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
+}
+
+static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
+ bool vlan_filtering)
+{
+ struct dsa_switch *ds = dp->ds;
+ int i;
+
+ if (!ds->vlan_filtering_is_global)
+ return true;
+
+ /* For cases where enabling/disabling VLAN awareness is global to the
+ * switch, we need to handle the case where multiple bridges span
+ * different ports of the same switch device and one of them has a
+ * different setting than what is being requested.
+ */
+ for (i = 0; i < ds->num_ports; i++) {
+ struct net_device *other_bridge;
+
+ other_bridge = dsa_to_port(ds, i)->bridge_dev;
+ if (!other_bridge)
+ continue;
+ /* If it's the same bridge, it also has same
+ * vlan_filtering setting => no need to check
+ */
+ if (other_bridge == dp->bridge_dev)
+ continue;
+ if (br_vlan_enabled(other_bridge) != vlan_filtering) {
+ dev_err(ds->dev, "VLAN filtering is a global setting\n");
+ return false;
+ }
+ }
+ return true;
+}
+
+int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
+ struct switchdev_trans *trans)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
+ if (switchdev_trans_ph_prepare(trans))
+ return 0;
+
+ if (!ds->ops->port_vlan_filtering)
+ return 0;
+
+ if (!dsa_port_can_apply_vlan_filtering(dp, vlan_filtering))
+ return -EINVAL;
+
+ if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
+ return 0;
+
+ err = ds->ops->port_vlan_filtering(ds, dp->index,
+ vlan_filtering);
+ if (err)
+ return err;
+
+ if (ds->vlan_filtering_is_global)
+ ds->vlan_filtering = vlan_filtering;
+ else
+ dp->vlan_filtering = vlan_filtering;
+ return 0;
+}
+
+/* This enforces legacy behavior for switch drivers which assume they can't
+ * receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
+ */
+bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!dp->bridge_dev)
+ return false;
+
+ return (!ds->configure_vlan_while_not_filtering &&
+ !br_vlan_enabled(dp->bridge_dev));
+}
+
+int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
+ struct switchdev_trans *trans)
+{
+ unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
+ unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
+ struct dsa_notifier_ageing_time_info info = {
+ .ageing_time = ageing_time,
+ .trans = trans,
+ };
+
+ if (switchdev_trans_ph_prepare(trans))
+ return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
+
+ dp->ageing_time = ageing_time;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
+}
+
+int dsa_port_pre_bridge_flags(const struct dsa_port *dp, unsigned long flags,
+ struct switchdev_trans *trans)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_egress_floods ||
+ (flags & ~(BR_FLOOD | BR_MCAST_FLOOD)))
+ return -EINVAL;
+
+ return 0;
+}
+
+int dsa_port_bridge_flags(const struct dsa_port *dp, unsigned long flags,
+ struct switchdev_trans *trans)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+ int err = 0;
+
+ if (switchdev_trans_ph_prepare(trans))
+ return 0;
+
+ if (ds->ops->port_egress_floods)
+ err = ds->ops->port_egress_floods(ds, port, flags & BR_FLOOD,
+ flags & BR_MCAST_FLOOD);
+
+ return err;
+}
+
+int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
+ struct switchdev_trans *trans)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (switchdev_trans_ph_prepare(trans))
+ return ds->ops->port_egress_floods ? 0 : -EOPNOTSUPP;
+
+ return ds->ops->port_egress_floods(ds, port, true, mrouter);
+}
+
+int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
+ u16 vid)
+{
+ struct dsa_notifier_fdb_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .addr = addr,
+ .vid = vid,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
+}
+
+int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
+ u16 vid)
+{
+ struct dsa_notifier_fdb_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .addr = addr,
+ .vid = vid,
+
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
+}
+
+int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (!ds->ops->port_fdb_dump)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_fdb_dump(ds, port, cb, data);
+}
+
+int dsa_port_mdb_add(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct switchdev_trans *trans)
+{
+ struct dsa_notifier_mdb_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .trans = trans,
+ .mdb = mdb,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
+}
+
+int dsa_port_mdb_del(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct dsa_notifier_mdb_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .mdb = mdb,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
+}
+
+int dsa_port_vlan_add(struct dsa_port *dp,
+ const struct switchdev_obj_port_vlan *vlan,
+ struct switchdev_trans *trans)
+{
+ struct dsa_notifier_vlan_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .trans = trans,
+ .vlan = vlan,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
+}
+
+int dsa_port_vlan_del(struct dsa_port *dp,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ struct dsa_notifier_vlan_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .vlan = vlan,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
+}
+
+int dsa_port_vid_add(struct dsa_port *dp, u16 vid, u16 flags)
+{
+ struct switchdev_obj_port_vlan vlan = {
+ .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+ .flags = flags,
+ .vid_begin = vid,
+ .vid_end = vid,
+ };
+ struct switchdev_trans trans;
+ int err;
+
+ trans.ph_prepare = true;
+ err = dsa_port_vlan_add(dp, &vlan, &trans);
+ if (err)
+ return err;
+
+ trans.ph_prepare = false;
+ return dsa_port_vlan_add(dp, &vlan, &trans);
+}
+EXPORT_SYMBOL(dsa_port_vid_add);
+
+int dsa_port_vid_del(struct dsa_port *dp, u16 vid)
+{
+ struct switchdev_obj_port_vlan vlan = {
+ .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+ .vid_begin = vid,
+ .vid_end = vid,
+ };
+
+ return dsa_port_vlan_del(dp, &vlan);
+}
+EXPORT_SYMBOL(dsa_port_vid_del);
+
+static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
+{
+ struct device_node *phy_dn;
+ struct phy_device *phydev;
+
+ phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
+ if (!phy_dn)
+ return NULL;
+
+ phydev = of_phy_find_device(phy_dn);
+ if (!phydev) {
+ of_node_put(phy_dn);
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ of_node_put(phy_dn);
+ return phydev;
+}
+
+void dsa_port_phylink_validate(struct phylink_config *config,
+ unsigned long *supported,
+ struct phylink_link_state *state)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_validate)
+ return;
+
+ ds->ops->phylink_validate(ds, dp->index, supported, state);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_validate);
+
+int dsa_port_phylink_mac_link_state(struct phylink_config *config,
+ struct phylink_link_state *state)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct dsa_switch *ds = dp->ds;
+
+ /* Only called for SGMII and 802.3z */
+ if (!ds->ops->phylink_mac_link_state)
+ return -EOPNOTSUPP;
+
+ return ds->ops->phylink_mac_link_state(ds, dp->index, state);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_state);
+
+void dsa_port_phylink_mac_config(struct phylink_config *config,
+ unsigned int mode,
+ const struct phylink_link_state *state)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_mac_config)
+ return;
+
+ ds->ops->phylink_mac_config(ds, dp->index, mode, state);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_config);
+
+void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_mac_an_restart)
+ return;
+
+ ds->ops->phylink_mac_an_restart(ds, dp->index);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_an_restart);
+
+void dsa_port_phylink_mac_link_down(struct phylink_config *config,
+ unsigned int mode,
+ phy_interface_t interface)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct phy_device *phydev = NULL;
+ struct dsa_switch *ds = dp->ds;
+
+ if (dsa_is_user_port(ds, dp->index))
+ phydev = dp->slave->phydev;
+
+ if (!ds->ops->phylink_mac_link_down) {
+ if (ds->ops->adjust_link && phydev)
+ ds->ops->adjust_link(ds, dp->index, phydev);
+ return;
+ }
+
+ ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_down);
+
+void dsa_port_phylink_mac_link_up(struct phylink_config *config,
+ unsigned int mode,
+ phy_interface_t interface,
+ struct phy_device *phydev)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->phylink_mac_link_up) {
+ if (ds->ops->adjust_link && phydev)
+ ds->ops->adjust_link(ds, dp->index, phydev);
+ return;
+ }
+
+ ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev);
+}
+EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_up);
+
+const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
+ .validate = dsa_port_phylink_validate,
+ .mac_link_state = dsa_port_phylink_mac_link_state,
+ .mac_config = dsa_port_phylink_mac_config,
+ .mac_an_restart = dsa_port_phylink_mac_an_restart,
+ .mac_link_down = dsa_port_phylink_mac_link_down,
+ .mac_link_up = dsa_port_phylink_mac_link_up,
+};
+
+static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct phy_device *phydev;
+ int port = dp->index;
+ int err = 0;
+
+ phydev = dsa_port_get_phy_device(dp);
+ if (!phydev)
+ return 0;
+
+ if (IS_ERR(phydev))
+ return PTR_ERR(phydev);
+
+ if (enable) {
+ err = genphy_resume(phydev);
+ if (err < 0)
+ goto err_put_dev;
+
+ err = genphy_read_status(phydev);
+ if (err < 0)
+ goto err_put_dev;
+ } else {
+ err = genphy_suspend(phydev);
+ if (err < 0)
+ goto err_put_dev;
+ }
+
+ if (ds->ops->adjust_link)
+ ds->ops->adjust_link(ds, port, phydev);
+
+ dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
+
+err_put_dev:
+ put_device(&phydev->mdio.dev);
+ return err;
+}
+
+static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
+{
+ struct device_node *dn = dp->dn;
+ struct dsa_switch *ds = dp->ds;
+ struct phy_device *phydev;
+ int port = dp->index;
+ int mode;
+ int err;
+
+ err = of_phy_register_fixed_link(dn);
+ if (err) {
+ dev_err(ds->dev,
+ "failed to register the fixed PHY of port %d\n",
+ port);
+ return err;
+ }
+
+ phydev = of_phy_find_device(dn);
+
+ mode = of_get_phy_mode(dn);
+ if (mode < 0)
+ mode = PHY_INTERFACE_MODE_NA;
+ phydev->interface = mode;
+
+ genphy_read_status(phydev);
+
+ if (ds->ops->adjust_link)
+ ds->ops->adjust_link(ds, port, phydev);
+
+ put_device(&phydev->mdio.dev);
+
+ return 0;
+}
+
+static int dsa_port_phylink_register(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct device_node *port_dn = dp->dn;
+ int mode, err;
+
+ mode = of_get_phy_mode(port_dn);
+ if (mode < 0)
+ mode = PHY_INTERFACE_MODE_NA;
+
+ dp->pl_config.dev = ds->dev;
+ dp->pl_config.type = PHYLINK_DEV;
+
+ dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn),
+ mode, &dsa_port_phylink_mac_ops);
+ if (IS_ERR(dp->pl)) {
+ pr_err("error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
+ return PTR_ERR(dp->pl);
+ }
+
+ err = phylink_of_phy_connect(dp->pl, port_dn, 0);
+ if (err && err != -ENODEV) {
+ pr_err("could not attach to PHY: %d\n", err);
+ goto err_phy_connect;
+ }
+
+ return 0;
+
+err_phy_connect:
+ phylink_destroy(dp->pl);
+ return err;
+}
+
+int dsa_port_link_register_of(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct device_node *phy_np;
+
+ if (!ds->ops->adjust_link) {
+ phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
+ if (of_phy_is_fixed_link(dp->dn) || phy_np)
+ return dsa_port_phylink_register(dp);
+ return 0;
+ }
+
+ dev_warn(ds->dev,
+ "Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
+
+ if (of_phy_is_fixed_link(dp->dn))
+ return dsa_port_fixed_link_register_of(dp);
+ else
+ return dsa_port_setup_phy_of(dp, true);
+}
+
+void dsa_port_link_unregister_of(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->adjust_link && dp->pl) {
+ rtnl_lock();
+ phylink_disconnect_phy(dp->pl);
+ rtnl_unlock();
+ phylink_destroy(dp->pl);
+ dp->pl = NULL;
+ return;
+ }
+
+ if (of_phy_is_fixed_link(dp->dn))
+ of_phy_deregister_fixed_link(dp->dn);
+ else
+ dsa_port_setup_phy_of(dp, false);
+}
+
+int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
+{
+ struct phy_device *phydev;
+ int ret = -EOPNOTSUPP;
+
+ if (of_phy_is_fixed_link(dp->dn))
+ return ret;
+
+ phydev = dsa_port_get_phy_device(dp);
+ if (IS_ERR_OR_NULL(phydev))
+ return ret;
+
+ ret = phy_ethtool_get_strings(phydev, data);
+ put_device(&phydev->mdio.dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
+
+int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
+{
+ struct phy_device *phydev;
+ int ret = -EOPNOTSUPP;
+
+ if (of_phy_is_fixed_link(dp->dn))
+ return ret;
+
+ phydev = dsa_port_get_phy_device(dp);
+ if (IS_ERR_OR_NULL(phydev))
+ return ret;
+
+ ret = phy_ethtool_get_stats(phydev, NULL, data);
+ put_device(&phydev->mdio.dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
+
+int dsa_port_get_phy_sset_count(struct dsa_port *dp)
+{
+ struct phy_device *phydev;
+ int ret = -EOPNOTSUPP;
+
+ if (of_phy_is_fixed_link(dp->dn))
+ return ret;
+
+ phydev = dsa_port_get_phy_device(dp);
+ if (IS_ERR_OR_NULL(phydev))
+ return ret;
+
+ ret = phy_ethtool_get_sset_count(phydev);
+ put_device(&phydev->mdio.dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);