diff options
Diffstat (limited to 'net/dsa/port.c')
| -rw-r--r-- | net/dsa/port.c | 2083 |
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)); +} |