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-rw-r--r--net/dsa/port.c2083
1 files changed, 2083 insertions, 0 deletions
diff --git a/net/dsa/port.c b/net/dsa/port.c
new file mode 100644
index 000000000..750fe68d9
--- /dev/null
+++ b/net/dsa/port.c
@@ -0,0 +1,2083 @@
+// 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/netdevice.h>
+#include <linux/notifier.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+
+#include "dsa_priv.h"
+
+/**
+ * dsa_port_notify - Notify the switching fabric of changes to a port
+ * @dp: port on which change occurred
+ * @e: event, must be of type DSA_NOTIFIER_*
+ * @v: event-specific value.
+ *
+ * Notify all switches in the DSA tree that this port's switch belongs to,
+ * including this switch itself, of an event. Allows the other switches to
+ * reconfigure themselves for cross-chip operations. Can also be used to
+ * reconfigure ports without net_devices (CPU ports, DSA links) whenever
+ * a user port's state changes.
+ */
+static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
+{
+ return dsa_tree_notify(dp->ds->dst, e, v);
+}
+
+static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp, u16 vid)
+{
+ struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
+ struct switchdev_notifier_fdb_info info = {
+ .vid = vid,
+ };
+
+ /* When the port becomes standalone it has already left the bridge.
+ * Don't notify the bridge in that case.
+ */
+ if (!brport_dev)
+ return;
+
+ call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
+ brport_dev, &info.info, NULL);
+}
+
+static void dsa_port_fast_age(const struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_fast_age)
+ return;
+
+ ds->ops->port_fast_age(ds, dp->index);
+
+ /* flush all VLANs */
+ dsa_port_notify_bridge_fdb_flush(dp, 0);
+}
+
+static int dsa_port_vlan_fast_age(const struct dsa_port *dp, u16 vid)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ if (!ds->ops->port_vlan_fast_age)
+ return -EOPNOTSUPP;
+
+ err = ds->ops->port_vlan_fast_age(ds, dp->index, vid);
+
+ if (!err)
+ dsa_port_notify_bridge_fdb_flush(dp, vid);
+
+ return err;
+}
+
+static int dsa_port_msti_fast_age(const struct dsa_port *dp, u16 msti)
+{
+ DECLARE_BITMAP(vids, VLAN_N_VID) = { 0 };
+ int err, vid;
+
+ err = br_mst_get_info(dsa_port_bridge_dev_get(dp), msti, vids);
+ if (err)
+ return err;
+
+ for_each_set_bit(vid, vids, VLAN_N_VID) {
+ err = dsa_port_vlan_fast_age(dp, vid);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static bool dsa_port_can_configure_learning(struct dsa_port *dp)
+{
+ struct switchdev_brport_flags flags = {
+ .mask = BR_LEARNING,
+ };
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ if (!ds->ops->port_bridge_flags || !ds->ops->port_pre_bridge_flags)
+ return false;
+
+ err = ds->ops->port_pre_bridge_flags(ds, dp->index, flags, NULL);
+ return !err;
+}
+
+bool dsa_port_supports_hwtstamp(struct dsa_port *dp, struct ifreq *ifr)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ if (!ds->ops->port_hwtstamp_get || !ds->ops->port_hwtstamp_set)
+ return false;
+
+ /* "See through" shim implementations of the "get" method.
+ * This will clobber the ifreq structure, but we will either return an
+ * error, or the master will overwrite it with proper values.
+ */
+ err = ds->ops->port_hwtstamp_get(ds, dp->index, ifr);
+ return err != -EOPNOTSUPP;
+}
+
+int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (!ds->ops->port_stp_state_set)
+ return -EOPNOTSUPP;
+
+ ds->ops->port_stp_state_set(ds, port, state);
+
+ if (!dsa_port_can_configure_learning(dp) ||
+ (do_fast_age && dp->learning)) {
+ /* 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.
+ * Ports that were standalone before the STP state change don't
+ * need to fast age the FDB, since address learning is off in
+ * standalone mode.
+ */
+
+ 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))
+ dsa_port_fast_age(dp);
+ }
+
+ dp->stp_state = state;
+
+ return 0;
+}
+
+static void dsa_port_set_state_now(struct dsa_port *dp, u8 state,
+ bool do_fast_age)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ err = dsa_port_set_state(dp, state, do_fast_age);
+ if (err && err != -EOPNOTSUPP) {
+ dev_err(ds->dev, "port %d failed to set STP state %u: %pe\n",
+ dp->index, state, ERR_PTR(err));
+ }
+}
+
+int dsa_port_set_mst_state(struct dsa_port *dp,
+ const struct switchdev_mst_state *state,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_switch *ds = dp->ds;
+ u8 prev_state;
+ int err;
+
+ if (!ds->ops->port_mst_state_set)
+ return -EOPNOTSUPP;
+
+ err = br_mst_get_state(dsa_port_to_bridge_port(dp), state->msti,
+ &prev_state);
+ if (err)
+ return err;
+
+ err = ds->ops->port_mst_state_set(ds, dp->index, state);
+ if (err)
+ return err;
+
+ if (!(dp->learning &&
+ (prev_state == BR_STATE_LEARNING ||
+ prev_state == BR_STATE_FORWARDING) &&
+ (state->state == BR_STATE_DISABLED ||
+ state->state == BR_STATE_BLOCKING ||
+ state->state == BR_STATE_LISTENING)))
+ return 0;
+
+ err = dsa_port_msti_fast_age(dp, state->msti);
+ if (err)
+ NL_SET_ERR_MSG_MOD(extack,
+ "Unable to flush associated VLANs");
+
+ return 0;
+}
+
+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)
+ dsa_port_set_state_now(dp, BR_STATE_FORWARDING, false);
+
+ 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)
+ dsa_port_set_state_now(dp, BR_STATE_DISABLED, false);
+
+ 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();
+}
+
+static void dsa_port_reset_vlan_filtering(struct dsa_port *dp,
+ struct dsa_bridge bridge)
+{
+ struct netlink_ext_ack extack = {0};
+ bool change_vlan_filtering = false;
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_port *other_dp;
+ bool vlan_filtering;
+ int err;
+
+ if (ds->needs_standalone_vlan_filtering &&
+ !br_vlan_enabled(bridge.dev)) {
+ change_vlan_filtering = true;
+ vlan_filtering = true;
+ } else if (!ds->needs_standalone_vlan_filtering &&
+ br_vlan_enabled(bridge.dev)) {
+ change_vlan_filtering = true;
+ vlan_filtering = false;
+ }
+
+ /* If the bridge was vlan_filtering, the bridge core doesn't trigger an
+ * event for changing vlan_filtering setting upon slave ports leaving
+ * it. That is a good thing, because that lets us handle it and also
+ * handle the case where the switch's vlan_filtering setting is global
+ * (not per port). When that happens, the correct moment to trigger the
+ * vlan_filtering callback is only when the last port leaves the last
+ * VLAN-aware bridge.
+ */
+ if (change_vlan_filtering && ds->vlan_filtering_is_global) {
+ dsa_switch_for_each_port(other_dp, ds) {
+ struct net_device *br = dsa_port_bridge_dev_get(other_dp);
+
+ if (br && br_vlan_enabled(br)) {
+ change_vlan_filtering = false;
+ break;
+ }
+ }
+ }
+
+ if (!change_vlan_filtering)
+ return;
+
+ err = dsa_port_vlan_filtering(dp, vlan_filtering, &extack);
+ if (extack._msg) {
+ dev_err(ds->dev, "port %d: %s\n", dp->index,
+ extack._msg);
+ }
+ if (err && err != -EOPNOTSUPP) {
+ dev_err(ds->dev,
+ "port %d failed to reset VLAN filtering to %d: %pe\n",
+ dp->index, vlan_filtering, ERR_PTR(err));
+ }
+}
+
+static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
+ struct netlink_ext_ack *extack)
+{
+ const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
+ BR_BCAST_FLOOD | BR_PORT_LOCKED;
+ struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
+ int flag, err;
+
+ for_each_set_bit(flag, &mask, 32) {
+ struct switchdev_brport_flags flags = {0};
+
+ flags.mask = BIT(flag);
+
+ if (br_port_flag_is_set(brport_dev, BIT(flag)))
+ flags.val = BIT(flag);
+
+ err = dsa_port_bridge_flags(dp, flags, extack);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ return 0;
+}
+
+static void dsa_port_clear_brport_flags(struct dsa_port *dp)
+{
+ const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
+ const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
+ BR_BCAST_FLOOD | BR_PORT_LOCKED;
+ int flag, err;
+
+ for_each_set_bit(flag, &mask, 32) {
+ struct switchdev_brport_flags flags = {0};
+
+ flags.mask = BIT(flag);
+ flags.val = val & BIT(flag);
+
+ err = dsa_port_bridge_flags(dp, flags, NULL);
+ if (err && err != -EOPNOTSUPP)
+ dev_err(dp->ds->dev,
+ "failed to clear bridge port flag %lu: %pe\n",
+ flags.val, ERR_PTR(err));
+ }
+}
+
+static int dsa_port_switchdev_sync_attrs(struct dsa_port *dp,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
+ struct net_device *br = dsa_port_bridge_dev_get(dp);
+ int err;
+
+ err = dsa_port_inherit_brport_flags(dp, extack);
+ if (err)
+ return err;
+
+ err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev), false);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+
+ err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+
+ err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
+ if (err && err != -EOPNOTSUPP)
+ return err;
+
+ return 0;
+}
+
+static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp,
+ struct dsa_bridge bridge)
+{
+ /* Configure the port for standalone mode (no address learning,
+ * flood everything).
+ * The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
+ * when the user requests it through netlink or sysfs, but not
+ * automatically at port join or leave, so we need to handle resetting
+ * the brport flags ourselves. But we even prefer it that way, because
+ * otherwise, some setups might never get the notification they need,
+ * for example, when a port leaves a LAG that offloads the bridge,
+ * it becomes standalone, but as far as the bridge is concerned, no
+ * port ever left.
+ */
+ dsa_port_clear_brport_flags(dp);
+
+ /* 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, true);
+
+ dsa_port_reset_vlan_filtering(dp, bridge);
+
+ /* Ageing time may be global to the switch chip, so don't change it
+ * here because we have no good reason (or value) to change it to.
+ */
+}
+
+static int dsa_port_bridge_create(struct dsa_port *dp,
+ struct net_device *br,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_bridge *bridge;
+
+ bridge = dsa_tree_bridge_find(ds->dst, br);
+ if (bridge) {
+ refcount_inc(&bridge->refcount);
+ dp->bridge = bridge;
+ return 0;
+ }
+
+ bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
+ if (!bridge)
+ return -ENOMEM;
+
+ refcount_set(&bridge->refcount, 1);
+
+ bridge->dev = br;
+
+ bridge->num = dsa_bridge_num_get(br, ds->max_num_bridges);
+ if (ds->max_num_bridges && !bridge->num) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Range of offloadable bridges exceeded");
+ kfree(bridge);
+ return -EOPNOTSUPP;
+ }
+
+ dp->bridge = bridge;
+
+ return 0;
+}
+
+static void dsa_port_bridge_destroy(struct dsa_port *dp,
+ const struct net_device *br)
+{
+ struct dsa_bridge *bridge = dp->bridge;
+
+ dp->bridge = NULL;
+
+ if (!refcount_dec_and_test(&bridge->refcount))
+ return;
+
+ if (bridge->num)
+ dsa_bridge_num_put(br, bridge->num);
+
+ kfree(bridge);
+}
+
+static bool dsa_port_supports_mst(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ return ds->ops->vlan_msti_set &&
+ ds->ops->port_mst_state_set &&
+ ds->ops->port_vlan_fast_age &&
+ dsa_port_can_configure_learning(dp);
+}
+
+int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_notifier_bridge_info info = {
+ .dp = dp,
+ .extack = extack,
+ };
+ struct net_device *dev = dp->slave;
+ struct net_device *brport_dev;
+ int err;
+
+ if (br_mst_enabled(br) && !dsa_port_supports_mst(dp))
+ return -EOPNOTSUPP;
+
+ /* Here the interface is already bridged. Reflect the current
+ * configuration so that drivers can program their chips accordingly.
+ */
+ err = dsa_port_bridge_create(dp, br, extack);
+ if (err)
+ return err;
+
+ brport_dev = dsa_port_to_bridge_port(dp);
+
+ info.bridge = *dp->bridge;
+ err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
+ if (err)
+ goto out_rollback;
+
+ /* Drivers which support bridge TX forwarding should set this */
+ dp->bridge->tx_fwd_offload = info.tx_fwd_offload;
+
+ err = switchdev_bridge_port_offload(brport_dev, dev, dp,
+ &dsa_slave_switchdev_notifier,
+ &dsa_slave_switchdev_blocking_notifier,
+ dp->bridge->tx_fwd_offload, extack);
+ if (err)
+ goto out_rollback_unbridge;
+
+ err = dsa_port_switchdev_sync_attrs(dp, extack);
+ if (err)
+ goto out_rollback_unoffload;
+
+ return 0;
+
+out_rollback_unoffload:
+ switchdev_bridge_port_unoffload(brport_dev, dp,
+ &dsa_slave_switchdev_notifier,
+ &dsa_slave_switchdev_blocking_notifier);
+ dsa_flush_workqueue();
+out_rollback_unbridge:
+ dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
+out_rollback:
+ dsa_port_bridge_destroy(dp, br);
+ return err;
+}
+
+void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br)
+{
+ struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
+
+ /* Don't try to unoffload something that is not offloaded */
+ if (!brport_dev)
+ return;
+
+ switchdev_bridge_port_unoffload(brport_dev, dp,
+ &dsa_slave_switchdev_notifier,
+ &dsa_slave_switchdev_blocking_notifier);
+
+ dsa_flush_workqueue();
+}
+
+void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
+{
+ struct dsa_notifier_bridge_info info = {
+ .dp = dp,
+ };
+ int err;
+
+ /* If the port could not be offloaded to begin with, then
+ * there is nothing to do.
+ */
+ if (!dp->bridge)
+ return;
+
+ info.bridge = *dp->bridge;
+
+ /* Here the port is already unbridged. Reflect the current configuration
+ * so that drivers can program their chips accordingly.
+ */
+ dsa_port_bridge_destroy(dp, br);
+
+ err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
+ if (err)
+ dev_err(dp->ds->dev,
+ "port %d failed to notify DSA_NOTIFIER_BRIDGE_LEAVE: %pe\n",
+ dp->index, ERR_PTR(err));
+
+ dsa_port_switchdev_unsync_attrs(dp, info.bridge);
+}
+
+int dsa_port_lag_change(struct dsa_port *dp,
+ struct netdev_lag_lower_state_info *linfo)
+{
+ struct dsa_notifier_lag_info info = {
+ .dp = dp,
+ };
+ bool tx_enabled;
+
+ if (!dp->lag)
+ return 0;
+
+ /* On statically configured aggregates (e.g. loadbalance
+ * without LACP) ports will always be tx_enabled, even if the
+ * link is down. Thus we require both link_up and tx_enabled
+ * in order to include it in the tx set.
+ */
+ tx_enabled = linfo->link_up && linfo->tx_enabled;
+
+ if (tx_enabled == dp->lag_tx_enabled)
+ return 0;
+
+ dp->lag_tx_enabled = tx_enabled;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
+}
+
+static int dsa_port_lag_create(struct dsa_port *dp,
+ struct net_device *lag_dev)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_lag *lag;
+
+ lag = dsa_tree_lag_find(ds->dst, lag_dev);
+ if (lag) {
+ refcount_inc(&lag->refcount);
+ dp->lag = lag;
+ return 0;
+ }
+
+ lag = kzalloc(sizeof(*lag), GFP_KERNEL);
+ if (!lag)
+ return -ENOMEM;
+
+ refcount_set(&lag->refcount, 1);
+ mutex_init(&lag->fdb_lock);
+ INIT_LIST_HEAD(&lag->fdbs);
+ lag->dev = lag_dev;
+ dsa_lag_map(ds->dst, lag);
+ dp->lag = lag;
+
+ return 0;
+}
+
+static void dsa_port_lag_destroy(struct dsa_port *dp)
+{
+ struct dsa_lag *lag = dp->lag;
+
+ dp->lag = NULL;
+ dp->lag_tx_enabled = false;
+
+ if (!refcount_dec_and_test(&lag->refcount))
+ return;
+
+ WARN_ON(!list_empty(&lag->fdbs));
+ dsa_lag_unmap(dp->ds->dst, lag);
+ kfree(lag);
+}
+
+int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
+ struct netdev_lag_upper_info *uinfo,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_notifier_lag_info info = {
+ .dp = dp,
+ .info = uinfo,
+ .extack = extack,
+ };
+ struct net_device *bridge_dev;
+ int err;
+
+ err = dsa_port_lag_create(dp, lag_dev);
+ if (err)
+ goto err_lag_create;
+
+ info.lag = *dp->lag;
+ err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
+ if (err)
+ goto err_lag_join;
+
+ bridge_dev = netdev_master_upper_dev_get(lag_dev);
+ if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
+ return 0;
+
+ err = dsa_port_bridge_join(dp, bridge_dev, extack);
+ if (err)
+ goto err_bridge_join;
+
+ return 0;
+
+err_bridge_join:
+ dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
+err_lag_join:
+ dsa_port_lag_destroy(dp);
+err_lag_create:
+ return err;
+}
+
+void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
+{
+ struct net_device *br = dsa_port_bridge_dev_get(dp);
+
+ if (br)
+ dsa_port_pre_bridge_leave(dp, br);
+}
+
+void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
+{
+ struct net_device *br = dsa_port_bridge_dev_get(dp);
+ struct dsa_notifier_lag_info info = {
+ .dp = dp,
+ };
+ int err;
+
+ if (!dp->lag)
+ return;
+
+ /* Port might have been part of a LAG that in turn was
+ * attached to a bridge.
+ */
+ if (br)
+ dsa_port_bridge_leave(dp, br);
+
+ info.lag = *dp->lag;
+
+ dsa_port_lag_destroy(dp);
+
+ err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
+ if (err)
+ dev_err(dp->ds->dev,
+ "port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n",
+ dp->index, ERR_PTR(err));
+}
+
+/* Must be called under rcu_read_lock() */
+static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
+ bool vlan_filtering,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_port *other_dp;
+ int err;
+
+ /* VLAN awareness was off, so the question is "can we turn it on".
+ * We may have had 8021q uppers, those need to go. Make sure we don't
+ * enter an inconsistent state: deny changing the VLAN awareness state
+ * as long as we have 8021q uppers.
+ */
+ if (vlan_filtering && dsa_port_is_user(dp)) {
+ struct net_device *br = dsa_port_bridge_dev_get(dp);
+ struct net_device *upper_dev, *slave = dp->slave;
+ struct list_head *iter;
+
+ netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
+ struct bridge_vlan_info br_info;
+ u16 vid;
+
+ if (!is_vlan_dev(upper_dev))
+ continue;
+
+ vid = vlan_dev_vlan_id(upper_dev);
+
+ /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
+ * device, respectively the VID is not found, returning
+ * 0 means success, which is a failure for us here.
+ */
+ err = br_vlan_get_info(br, vid, &br_info);
+ if (err == 0) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Must first remove VLAN uppers having VIDs also present in bridge");
+ return false;
+ }
+ }
+ }
+
+ 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.
+ */
+ dsa_switch_for_each_port(other_dp, ds) {
+ struct net_device *other_br = dsa_port_bridge_dev_get(other_dp);
+
+ /* If it's the same bridge, it also has same
+ * vlan_filtering setting => no need to check
+ */
+ if (!other_br || other_br == dsa_port_bridge_dev_get(dp))
+ continue;
+
+ if (br_vlan_enabled(other_br) != vlan_filtering) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "VLAN filtering is a global setting");
+ return false;
+ }
+ }
+ return true;
+}
+
+int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
+ struct netlink_ext_ack *extack)
+{
+ bool old_vlan_filtering = dsa_port_is_vlan_filtering(dp);
+ struct dsa_switch *ds = dp->ds;
+ bool apply;
+ int err;
+
+ if (!ds->ops->port_vlan_filtering)
+ return -EOPNOTSUPP;
+
+ /* We are called from dsa_slave_switchdev_blocking_event(),
+ * which is not under rcu_read_lock(), unlike
+ * dsa_slave_switchdev_event().
+ */
+ rcu_read_lock();
+ apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
+ rcu_read_unlock();
+ if (!apply)
+ return -EINVAL;
+
+ if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
+ return 0;
+
+ err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
+ extack);
+ if (err)
+ return err;
+
+ if (ds->vlan_filtering_is_global) {
+ struct dsa_port *other_dp;
+
+ ds->vlan_filtering = vlan_filtering;
+
+ dsa_switch_for_each_user_port(other_dp, ds) {
+ struct net_device *slave = other_dp->slave;
+
+ /* We might be called in the unbind path, so not
+ * all slave devices might still be registered.
+ */
+ if (!slave)
+ continue;
+
+ err = dsa_slave_manage_vlan_filtering(slave,
+ vlan_filtering);
+ if (err)
+ goto restore;
+ }
+ } else {
+ dp->vlan_filtering = vlan_filtering;
+
+ err = dsa_slave_manage_vlan_filtering(dp->slave,
+ vlan_filtering);
+ if (err)
+ goto restore;
+ }
+
+ return 0;
+
+restore:
+ ds->ops->port_vlan_filtering(ds, dp->index, old_vlan_filtering, NULL);
+
+ if (ds->vlan_filtering_is_global)
+ ds->vlan_filtering = old_vlan_filtering;
+ else
+ dp->vlan_filtering = old_vlan_filtering;
+
+ return err;
+}
+
+/* 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 net_device *br = dsa_port_bridge_dev_get(dp);
+ struct dsa_switch *ds = dp->ds;
+
+ if (!br)
+ return false;
+
+ return !ds->configure_vlan_while_not_filtering && !br_vlan_enabled(br);
+}
+
+int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
+{
+ 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;
+ int err;
+
+ info.ageing_time = ageing_time;
+
+ err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
+ if (err)
+ return err;
+
+ dp->ageing_time = ageing_time;
+
+ return 0;
+}
+
+int dsa_port_mst_enable(struct dsa_port *dp, bool on,
+ struct netlink_ext_ack *extack)
+{
+ if (on && !dsa_port_supports_mst(dp)) {
+ NL_SET_ERR_MSG_MOD(extack, "Hardware does not support MST");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_pre_bridge_flags)
+ return -EINVAL;
+
+ return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
+}
+
+int dsa_port_bridge_flags(struct dsa_port *dp,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ if (!ds->ops->port_bridge_flags)
+ return -EOPNOTSUPP;
+
+ err = ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
+ if (err)
+ return err;
+
+ if (flags.mask & BR_LEARNING) {
+ bool learning = flags.val & BR_LEARNING;
+
+ if (learning == dp->learning)
+ return 0;
+
+ if ((dp->learning && !learning) &&
+ (dp->stp_state == BR_STATE_LEARNING ||
+ dp->stp_state == BR_STATE_FORWARDING))
+ dsa_port_fast_age(dp);
+
+ dp->learning = learning;
+ }
+
+ return 0;
+}
+
+void dsa_port_set_host_flood(struct dsa_port *dp, bool uc, bool mc)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->port_set_host_flood)
+ ds->ops->port_set_host_flood(ds, dp->index, uc, mc);
+}
+
+int dsa_port_vlan_msti(struct dsa_port *dp,
+ const struct switchdev_vlan_msti *msti)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->vlan_msti_set)
+ return -EOPNOTSUPP;
+
+ return ds->ops->vlan_msti_set(ds, *dp->bridge, msti);
+}
+
+int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu)
+{
+ struct dsa_notifier_mtu_info info = {
+ .dp = dp,
+ .mtu = new_mtu,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
+}
+
+int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
+ u16 vid)
+{
+ struct dsa_notifier_fdb_info info = {
+ .dp = dp,
+ .addr = addr,
+ .vid = vid,
+ .db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ },
+ };
+
+ /* Refcounting takes bridge.num as a key, and should be global for all
+ * bridges in the absence of FDB isolation, and per bridge otherwise.
+ * Force the bridge.num to zero here in the absence of FDB isolation.
+ */
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ 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 = {
+ .dp = dp,
+ .addr = addr,
+ .vid = vid,
+ .db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ },
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
+}
+
+static int dsa_port_host_fdb_add(struct dsa_port *dp,
+ const unsigned char *addr, u16 vid,
+ struct dsa_db db)
+{
+ struct dsa_notifier_fdb_info info = {
+ .dp = dp,
+ .addr = addr,
+ .vid = vid,
+ .db = db,
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
+}
+
+int dsa_port_standalone_host_fdb_add(struct dsa_port *dp,
+ const unsigned char *addr, u16 vid)
+{
+ struct dsa_db db = {
+ .type = DSA_DB_PORT,
+ .dp = dp,
+ };
+
+ return dsa_port_host_fdb_add(dp, addr, vid, db);
+}
+
+int dsa_port_bridge_host_fdb_add(struct dsa_port *dp,
+ const unsigned char *addr, u16 vid)
+{
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_db db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ };
+ int err;
+
+ /* Avoid a call to __dev_set_promiscuity() on the master, which
+ * requires rtnl_lock(), since we can't guarantee that is held here,
+ * and we can't take it either.
+ */
+ if (master->priv_flags & IFF_UNICAST_FLT) {
+ err = dev_uc_add(master, addr);
+ if (err)
+ return err;
+ }
+
+ return dsa_port_host_fdb_add(dp, addr, vid, db);
+}
+
+static int dsa_port_host_fdb_del(struct dsa_port *dp,
+ const unsigned char *addr, u16 vid,
+ struct dsa_db db)
+{
+ struct dsa_notifier_fdb_info info = {
+ .dp = dp,
+ .addr = addr,
+ .vid = vid,
+ .db = db,
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
+}
+
+int dsa_port_standalone_host_fdb_del(struct dsa_port *dp,
+ const unsigned char *addr, u16 vid)
+{
+ struct dsa_db db = {
+ .type = DSA_DB_PORT,
+ .dp = dp,
+ };
+
+ return dsa_port_host_fdb_del(dp, addr, vid, db);
+}
+
+int dsa_port_bridge_host_fdb_del(struct dsa_port *dp,
+ const unsigned char *addr, u16 vid)
+{
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_db db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ };
+ int err;
+
+ if (master->priv_flags & IFF_UNICAST_FLT) {
+ err = dev_uc_del(master, addr);
+ if (err)
+ return err;
+ }
+
+ return dsa_port_host_fdb_del(dp, addr, vid, db);
+}
+
+int dsa_port_lag_fdb_add(struct dsa_port *dp, const unsigned char *addr,
+ u16 vid)
+{
+ struct dsa_notifier_lag_fdb_info info = {
+ .lag = dp->lag,
+ .addr = addr,
+ .vid = vid,
+ .db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ },
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_LAG_FDB_ADD, &info);
+}
+
+int dsa_port_lag_fdb_del(struct dsa_port *dp, const unsigned char *addr,
+ u16 vid)
+{
+ struct dsa_notifier_lag_fdb_info info = {
+ .lag = dp->lag,
+ .addr = addr,
+ .vid = vid,
+ .db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ },
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_LAG_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 dsa_notifier_mdb_info info = {
+ .dp = dp,
+ .mdb = mdb,
+ .db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ },
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ 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 = {
+ .dp = dp,
+ .mdb = mdb,
+ .db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ },
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
+}
+
+static int dsa_port_host_mdb_add(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct dsa_db db)
+{
+ struct dsa_notifier_mdb_info info = {
+ .dp = dp,
+ .mdb = mdb,
+ .db = db,
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
+}
+
+int dsa_port_standalone_host_mdb_add(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct dsa_db db = {
+ .type = DSA_DB_PORT,
+ .dp = dp,
+ };
+
+ return dsa_port_host_mdb_add(dp, mdb, db);
+}
+
+int dsa_port_bridge_host_mdb_add(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_db db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ };
+ int err;
+
+ err = dev_mc_add(master, mdb->addr);
+ if (err)
+ return err;
+
+ return dsa_port_host_mdb_add(dp, mdb, db);
+}
+
+static int dsa_port_host_mdb_del(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct dsa_db db)
+{
+ struct dsa_notifier_mdb_info info = {
+ .dp = dp,
+ .mdb = mdb,
+ .db = db,
+ };
+
+ if (!dp->ds->fdb_isolation)
+ info.db.bridge.num = 0;
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
+}
+
+int dsa_port_standalone_host_mdb_del(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct dsa_db db = {
+ .type = DSA_DB_PORT,
+ .dp = dp,
+ };
+
+ return dsa_port_host_mdb_del(dp, mdb, db);
+}
+
+int dsa_port_bridge_host_mdb_del(const struct dsa_port *dp,
+ const struct switchdev_obj_port_mdb *mdb)
+{
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_db db = {
+ .type = DSA_DB_BRIDGE,
+ .bridge = *dp->bridge,
+ };
+ int err;
+
+ err = dev_mc_del(master, mdb->addr);
+ if (err)
+ return err;
+
+ return dsa_port_host_mdb_del(dp, mdb, db);
+}
+
+int dsa_port_vlan_add(struct dsa_port *dp,
+ const struct switchdev_obj_port_vlan *vlan,
+ struct netlink_ext_ack *extack)
+{
+ struct dsa_notifier_vlan_info info = {
+ .dp = dp,
+ .vlan = vlan,
+ .extack = extack,
+ };
+
+ 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 = {
+ .dp = dp,
+ .vlan = vlan,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
+}
+
+int dsa_port_host_vlan_add(struct dsa_port *dp,
+ const struct switchdev_obj_port_vlan *vlan,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_notifier_vlan_info info = {
+ .dp = dp,
+ .vlan = vlan,
+ .extack = extack,
+ };
+ int err;
+
+ err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_ADD, &info);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+
+ vlan_vid_add(master, htons(ETH_P_8021Q), vlan->vid);
+
+ return err;
+}
+
+int dsa_port_host_vlan_del(struct dsa_port *dp,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ struct net_device *master = dsa_port_to_master(dp);
+ struct dsa_notifier_vlan_info info = {
+ .dp = dp,
+ .vlan = vlan,
+ };
+ int err;
+
+ err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_DEL, &info);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+
+ vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
+
+ return err;
+}
+
+int dsa_port_mrp_add(const struct dsa_port *dp,
+ const struct switchdev_obj_mrp *mrp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_add)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_mrp_add(ds, dp->index, mrp);
+}
+
+int dsa_port_mrp_del(const struct dsa_port *dp,
+ const struct switchdev_obj_mrp *mrp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_del)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_mrp_del(ds, dp->index, mrp);
+}
+
+int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
+ const struct switchdev_obj_ring_role_mrp *mrp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_add_ring_role)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_mrp_add_ring_role(ds, dp->index, mrp);
+}
+
+int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
+ const struct switchdev_obj_ring_role_mrp *mrp)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_del_ring_role)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_mrp_del_ring_role(ds, dp->index, mrp);
+}
+
+static int dsa_port_assign_master(struct dsa_port *dp,
+ struct net_device *master,
+ struct netlink_ext_ack *extack,
+ bool fail_on_err)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index, err;
+
+ err = ds->ops->port_change_master(ds, port, master, extack);
+ if (err && !fail_on_err)
+ dev_err(ds->dev, "port %d failed to assign master %s: %pe\n",
+ port, master->name, ERR_PTR(err));
+
+ if (err && fail_on_err)
+ return err;
+
+ dp->cpu_dp = master->dsa_ptr;
+ dp->cpu_port_in_lag = netif_is_lag_master(master);
+
+ return 0;
+}
+
+/* Change the dp->cpu_dp affinity for a user port. Note that both cross-chip
+ * notifiers and drivers have implicit assumptions about user-to-CPU-port
+ * mappings, so we unfortunately cannot delay the deletion of the objects
+ * (switchdev, standalone addresses, standalone VLANs) on the old CPU port
+ * until the new CPU port has been set up. So we need to completely tear down
+ * the old CPU port before changing it, and restore it on errors during the
+ * bringup of the new one.
+ */
+int dsa_port_change_master(struct dsa_port *dp, struct net_device *master,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *bridge_dev = dsa_port_bridge_dev_get(dp);
+ struct net_device *old_master = dsa_port_to_master(dp);
+ struct net_device *dev = dp->slave;
+ struct dsa_switch *ds = dp->ds;
+ bool vlan_filtering;
+ int err, tmp;
+
+ /* Bridges may hold host FDB, MDB and VLAN objects. These need to be
+ * migrated, so dynamically unoffload and later reoffload the bridge
+ * port.
+ */
+ if (bridge_dev) {
+ dsa_port_pre_bridge_leave(dp, bridge_dev);
+ dsa_port_bridge_leave(dp, bridge_dev);
+ }
+
+ /* The port might still be VLAN filtering even if it's no longer
+ * under a bridge, either due to ds->vlan_filtering_is_global or
+ * ds->needs_standalone_vlan_filtering. In turn this means VLANs
+ * on the CPU port.
+ */
+ vlan_filtering = dsa_port_is_vlan_filtering(dp);
+ if (vlan_filtering) {
+ err = dsa_slave_manage_vlan_filtering(dev, false);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Failed to remove standalone VLANs");
+ goto rewind_old_bridge;
+ }
+ }
+
+ /* Standalone addresses, and addresses of upper interfaces like
+ * VLAN, LAG, HSR need to be migrated.
+ */
+ dsa_slave_unsync_ha(dev);
+
+ err = dsa_port_assign_master(dp, master, extack, true);
+ if (err)
+ goto rewind_old_addrs;
+
+ dsa_slave_sync_ha(dev);
+
+ if (vlan_filtering) {
+ err = dsa_slave_manage_vlan_filtering(dev, true);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Failed to restore standalone VLANs");
+ goto rewind_new_addrs;
+ }
+ }
+
+ if (bridge_dev) {
+ err = dsa_port_bridge_join(dp, bridge_dev, extack);
+ if (err && err == -EOPNOTSUPP) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Failed to reoffload bridge");
+ goto rewind_new_vlan;
+ }
+ }
+
+ return 0;
+
+rewind_new_vlan:
+ if (vlan_filtering)
+ dsa_slave_manage_vlan_filtering(dev, false);
+
+rewind_new_addrs:
+ dsa_slave_unsync_ha(dev);
+
+ dsa_port_assign_master(dp, old_master, NULL, false);
+
+/* Restore the objects on the old CPU port */
+rewind_old_addrs:
+ dsa_slave_sync_ha(dev);
+
+ if (vlan_filtering) {
+ tmp = dsa_slave_manage_vlan_filtering(dev, true);
+ if (tmp) {
+ dev_err(ds->dev,
+ "port %d failed to restore standalone VLANs: %pe\n",
+ dp->index, ERR_PTR(tmp));
+ }
+ }
+
+rewind_old_bridge:
+ if (bridge_dev) {
+ tmp = dsa_port_bridge_join(dp, bridge_dev, extack);
+ if (tmp) {
+ dev_err(ds->dev,
+ "port %d failed to rejoin bridge %s: %pe\n",
+ dp->index, bridge_dev->name, ERR_PTR(tmp));
+ }
+ }
+
+ return err;
+}
+
+void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
+ const struct dsa_device_ops *tag_ops)
+{
+ cpu_dp->rcv = tag_ops->rcv;
+ cpu_dp->tag_ops = tag_ops;
+}
+
+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;
+}
+
+static 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) {
+ if (config->mac_capabilities)
+ phylink_generic_validate(config, supported, state);
+ return;
+ }
+
+ ds->ops->phylink_validate(ds, dp->index, supported, state);
+}
+
+static void dsa_port_phylink_mac_pcs_get_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;
+ int err;
+
+ /* Only called for inband modes */
+ if (!ds->ops->phylink_mac_link_state) {
+ state->link = 0;
+ return;
+ }
+
+ err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
+ if (err < 0) {
+ dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
+ dp->index, err);
+ state->link = 0;
+ }
+}
+
+static struct phylink_pcs *
+dsa_port_phylink_mac_select_pcs(struct phylink_config *config,
+ phy_interface_t interface)
+{
+ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+ struct phylink_pcs *pcs = ERR_PTR(-EOPNOTSUPP);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->phylink_mac_select_pcs)
+ pcs = ds->ops->phylink_mac_select_pcs(ds, dp->index, interface);
+
+ return pcs;
+}
+
+static 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);
+}
+
+static 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);
+}
+
+static 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_port_is_user(dp))
+ 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);
+}
+
+static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
+ struct phy_device *phydev,
+ unsigned int mode,
+ phy_interface_t interface,
+ int speed, int duplex,
+ bool tx_pause, bool rx_pause)
+{
+ 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,
+ speed, duplex, tx_pause, rx_pause);
+}
+
+static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
+ .validate = dsa_port_phylink_validate,
+ .mac_select_pcs = dsa_port_phylink_mac_select_pcs,
+ .mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_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,
+};
+
+int dsa_port_phylink_create(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ phy_interface_t mode;
+ struct phylink *pl;
+ int err;
+
+ err = of_get_phy_mode(dp->dn, &mode);
+ if (err)
+ mode = PHY_INTERFACE_MODE_NA;
+
+ /* Presence of phylink_mac_link_state or phylink_mac_an_restart is
+ * an indicator of a legacy phylink driver.
+ */
+ if (ds->ops->phylink_mac_link_state ||
+ ds->ops->phylink_mac_an_restart)
+ dp->pl_config.legacy_pre_march2020 = true;
+
+ if (ds->ops->phylink_get_caps)
+ ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config);
+
+ pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn),
+ mode, &dsa_port_phylink_mac_ops);
+ if (IS_ERR(pl)) {
+ pr_err("error creating PHYLINK: %ld\n", PTR_ERR(pl));
+ return PTR_ERR(pl);
+ }
+
+ dp->pl = pl;
+
+ return 0;
+}
+
+void dsa_port_phylink_destroy(struct dsa_port *dp)
+{
+ phylink_destroy(dp->pl);
+ dp->pl = NULL;
+}
+
+static int dsa_shared_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_shared_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;
+ phy_interface_t 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);
+
+ err = of_get_phy_mode(dn, &mode);
+ if (err)
+ 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_shared_port_phylink_register(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct device_node *port_dn = dp->dn;
+ int err;
+
+ dp->pl_config.dev = ds->dev;
+ dp->pl_config.type = PHYLINK_DEV;
+
+ err = dsa_port_phylink_create(dp);
+ if (err)
+ return err;
+
+ 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:
+ dsa_port_phylink_destroy(dp);
+ return err;
+}
+
+/* During the initial DSA driver migration to OF, port nodes were sometimes
+ * added to device trees with no indication of how they should operate from a
+ * link management perspective (phy-handle, fixed-link, etc). Additionally, the
+ * phy-mode may be absent. The interpretation of these port OF nodes depends on
+ * their type.
+ *
+ * User ports with no phy-handle or fixed-link are expected to connect to an
+ * internal PHY located on the ds->slave_mii_bus at an MDIO address equal to
+ * the port number. This description is still actively supported.
+ *
+ * Shared (CPU and DSA) ports with no phy-handle or fixed-link are expected to
+ * operate at the maximum speed that their phy-mode is capable of. If the
+ * phy-mode is absent, they are expected to operate using the phy-mode
+ * supported by the port that gives the highest link speed. It is unspecified
+ * if the port should use flow control or not, half duplex or full duplex, or
+ * if the phy-mode is a SERDES link, whether in-band autoneg is expected to be
+ * enabled or not.
+ *
+ * In the latter case of shared ports, omitting the link management description
+ * from the firmware node is deprecated and strongly discouraged. DSA uses
+ * phylink, which rejects the firmware nodes of these ports for lacking
+ * required properties.
+ *
+ * For switches in this table, DSA will skip enforcing validation and will
+ * later omit registering a phylink instance for the shared ports, if they lack
+ * a fixed-link, a phy-handle, or a managed = "in-band-status" property.
+ * It becomes the responsibility of the driver to ensure that these ports
+ * operate at the maximum speed (whatever this means) and will interoperate
+ * with the DSA master or other cascade port, since phylink methods will not be
+ * invoked for them.
+ *
+ * If you are considering expanding this table for newly introduced switches,
+ * think again. It is OK to remove switches from this table if there aren't DT
+ * blobs in circulation which rely on defaulting the shared ports.
+ */
+static const char * const dsa_switches_apply_workarounds[] = {
+#if IS_ENABLED(CONFIG_NET_DSA_XRS700X)
+ "arrow,xrs7003e",
+ "arrow,xrs7003f",
+ "arrow,xrs7004e",
+ "arrow,xrs7004f",
+#endif
+#if IS_ENABLED(CONFIG_B53)
+ "brcm,bcm5325",
+ "brcm,bcm53115",
+ "brcm,bcm53125",
+ "brcm,bcm53128",
+ "brcm,bcm5365",
+ "brcm,bcm5389",
+ "brcm,bcm5395",
+ "brcm,bcm5397",
+ "brcm,bcm5398",
+ "brcm,bcm53010-srab",
+ "brcm,bcm53011-srab",
+ "brcm,bcm53012-srab",
+ "brcm,bcm53018-srab",
+ "brcm,bcm53019-srab",
+ "brcm,bcm5301x-srab",
+ "brcm,bcm11360-srab",
+ "brcm,bcm58522-srab",
+ "brcm,bcm58525-srab",
+ "brcm,bcm58535-srab",
+ "brcm,bcm58622-srab",
+ "brcm,bcm58623-srab",
+ "brcm,bcm58625-srab",
+ "brcm,bcm88312-srab",
+ "brcm,cygnus-srab",
+ "brcm,nsp-srab",
+ "brcm,omega-srab",
+ "brcm,bcm3384-switch",
+ "brcm,bcm6328-switch",
+ "brcm,bcm6368-switch",
+ "brcm,bcm63xx-switch",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_BCM_SF2)
+ "brcm,bcm7445-switch-v4.0",
+ "brcm,bcm7278-switch-v4.0",
+ "brcm,bcm7278-switch-v4.8",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_LANTIQ_GSWIP)
+ "lantiq,xrx200-gswip",
+ "lantiq,xrx300-gswip",
+ "lantiq,xrx330-gswip",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_MV88E6060)
+ "marvell,mv88e6060",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_MV88E6XXX)
+ "marvell,mv88e6085",
+ "marvell,mv88e6190",
+ "marvell,mv88e6250",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_MICROCHIP_KSZ_COMMON)
+ "microchip,ksz8765",
+ "microchip,ksz8794",
+ "microchip,ksz8795",
+ "microchip,ksz8863",
+ "microchip,ksz8873",
+ "microchip,ksz9477",
+ "microchip,ksz9897",
+ "microchip,ksz9893",
+ "microchip,ksz9563",
+ "microchip,ksz8563",
+ "microchip,ksz9567",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_SMSC_LAN9303_MDIO)
+ "smsc,lan9303-mdio",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_SMSC_LAN9303_I2C)
+ "smsc,lan9303-i2c",
+#endif
+ NULL,
+};
+
+static void dsa_shared_port_validate_of(struct dsa_port *dp,
+ bool *missing_phy_mode,
+ bool *missing_link_description)
+{
+ struct device_node *dn = dp->dn, *phy_np;
+ struct dsa_switch *ds = dp->ds;
+ phy_interface_t mode;
+
+ *missing_phy_mode = false;
+ *missing_link_description = false;
+
+ if (of_get_phy_mode(dn, &mode)) {
+ *missing_phy_mode = true;
+ dev_err(ds->dev,
+ "OF node %pOF of %s port %d lacks the required \"phy-mode\" property\n",
+ dn, dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
+ }
+
+ /* Note: of_phy_is_fixed_link() also returns true for
+ * managed = "in-band-status"
+ */
+ if (of_phy_is_fixed_link(dn))
+ return;
+
+ phy_np = of_parse_phandle(dn, "phy-handle", 0);
+ if (phy_np) {
+ of_node_put(phy_np);
+ return;
+ }
+
+ *missing_link_description = true;
+
+ dev_err(ds->dev,
+ "OF node %pOF of %s port %d lacks the required \"phy-handle\", \"fixed-link\" or \"managed\" properties\n",
+ dn, dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
+}
+
+int dsa_shared_port_link_register_of(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ bool missing_link_description;
+ bool missing_phy_mode;
+ int port = dp->index;
+
+ dsa_shared_port_validate_of(dp, &missing_phy_mode,
+ &missing_link_description);
+
+ if ((missing_phy_mode || missing_link_description) &&
+ !of_device_compatible_match(ds->dev->of_node,
+ dsa_switches_apply_workarounds))
+ return -EINVAL;
+
+ if (!ds->ops->adjust_link) {
+ if (missing_link_description) {
+ dev_warn(ds->dev,
+ "Skipping phylink registration for %s port %d\n",
+ dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
+ } else {
+ if (ds->ops->phylink_mac_link_down)
+ ds->ops->phylink_mac_link_down(ds, port,
+ MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
+
+ return dsa_shared_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_shared_port_fixed_link_register_of(dp);
+ else
+ return dsa_shared_port_setup_phy_of(dp, true);
+}
+
+void dsa_shared_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();
+ dsa_port_phylink_destroy(dp);
+ return;
+ }
+
+ if (of_phy_is_fixed_link(dp->dn))
+ of_phy_deregister_fixed_link(dp->dn);
+ else
+ dsa_shared_port_setup_phy_of(dp, false);
+}
+
+int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ if (!ds->ops->port_hsr_join)
+ return -EOPNOTSUPP;
+
+ dp->hsr_dev = hsr;
+
+ err = ds->ops->port_hsr_join(ds, dp->index, hsr);
+ if (err)
+ dp->hsr_dev = NULL;
+
+ return err;
+}
+
+void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ dp->hsr_dev = NULL;
+
+ if (ds->ops->port_hsr_leave) {
+ err = ds->ops->port_hsr_leave(ds, dp->index, hsr);
+ if (err)
+ dev_err(dp->ds->dev,
+ "port %d failed to leave HSR %s: %pe\n",
+ dp->index, hsr->name, ERR_PTR(err));
+ }
+}
+
+int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast)
+{
+ struct dsa_notifier_tag_8021q_vlan_info info = {
+ .dp = dp,
+ .vid = vid,
+ };
+
+ if (broadcast)
+ return dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, &info);
+}
+
+void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast)
+{
+ struct dsa_notifier_tag_8021q_vlan_info info = {
+ .dp = dp,
+ .vid = vid,
+ };
+ int err;
+
+ if (broadcast)
+ err = dsa_broadcast(DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
+ else
+ err = dsa_port_notify(dp, DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, &info);
+ if (err)
+ dev_err(dp->ds->dev,
+ "port %d failed to notify tag_8021q VLAN %d deletion: %pe\n",
+ dp->index, vid, ERR_PTR(err));
+}