| // 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" |
| |
| /** |
| * 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; |
| } |
| |
| 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) |
| { |
| int err; |
| |
| err = dsa_port_set_state(dp, state, do_fast_age); |
| if (err) |
| pr_err("DSA: failed to set STP state %u (%d)\n", state, 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, |
| }; |
| 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 dsa_port *cpu_dp = dp->cpu_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 (cpu_dp->master->priv_flags & IFF_UNICAST_FLT) { |
| err = dev_uc_add(cpu_dp->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 dsa_port *cpu_dp = dp->cpu_dp; |
| struct dsa_db db = { |
| .type = DSA_DB_BRIDGE, |
| .bridge = *dp->bridge, |
| }; |
| int err; |
| |
| if (cpu_dp->master->priv_flags & IFF_UNICAST_FLT) { |
| err = dev_uc_del(cpu_dp->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 dsa_port *cpu_dp = dp->cpu_dp; |
| struct dsa_db db = { |
| .type = DSA_DB_BRIDGE, |
| .bridge = *dp->bridge, |
| }; |
| int err; |
| |
| err = dev_mc_add(cpu_dp->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 dsa_port *cpu_dp = dp->cpu_dp; |
| struct dsa_db db = { |
| .type = DSA_DB_BRIDGE, |
| .bridge = *dp->bridge, |
| }; |
| int err; |
| |
| err = dev_mc_del(cpu_dp->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 dsa_notifier_vlan_info info = { |
| .dp = dp, |
| .vlan = vlan, |
| .extack = extack, |
| }; |
| struct dsa_port *cpu_dp = dp->cpu_dp; |
| int err; |
| |
| err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_ADD, &info); |
| if (err && err != -EOPNOTSUPP) |
| return err; |
| |
| vlan_vid_add(cpu_dp->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 dsa_notifier_vlan_info info = { |
| .dp = dp, |
| .vlan = vlan, |
| }; |
| struct dsa_port *cpu_dp = dp->cpu_dp; |
| int err; |
| |
| err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_DEL, &info); |
| if (err && err != -EOPNOTSUPP) |
| return err; |
| |
| vlan_vid_del(cpu_dp->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); |
| } |
| |
| 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; |
| 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); |
| |
| dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->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); |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| 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_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: |
| 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; |
| int port = dp->index; |
| |
| 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) { |
| if (ds->ops->phylink_mac_link_down) |
| ds->ops->phylink_mac_link_down(ds, port, |
| MLO_AN_FIXED, PHY_INTERFACE_MODE_NA); |
| of_node_put(phy_np); |
| return dsa_port_phylink_register(dp); |
| } |
| of_node_put(phy_np); |
| 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_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)); |
| } |