[PATCH net-next 8/8] net: dsa: mt7530: implement port_change_conduit op
flat view
STALE121d
From: Daniel Golle <daniel@makrotopia.org>
Date: 2026-06-10 19:57:04
Also in:
linux-arm-kernel, linux-mediatek, lkml
Subsystem:
mediatek switch driver, networking drivers, networking [dsa], the rest · Maintainers:
Chester A. Unal, Daniel Golle, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn, Vladimir Oltean, Linus Torvalds
Allow changing the CPU port affinity of user ports at runtime via the IFLA_DSA_CONDUIT netlink attribute. This updates the port matrix to forward to the new CPU port instead of the old one. Signed-off-by: Daniel Golle <daniel@makrotopia.org> --- drivers/net/dsa/mt7530.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index c96420c291d5..2f3e734b9f53 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c@@ -3206,6 +3206,34 @@ static int mt753x_set_mac_eee(struct dsa_switch *ds, int port, return 0; } +static int +mt753x_port_change_conduit(struct dsa_switch *ds, int port, + struct net_device *conduit, + struct netlink_ext_ack *extack) +{ + struct dsa_port *new_cpu_dp = conduit->dsa_ptr; + struct dsa_port *dp = dsa_to_port(ds, port); + struct mt7530_priv *priv = ds->priv; + + if (priv->id != ID_MT7531) + return -EOPNOTSUPP; + + mutex_lock(&priv->reg_mutex); + + /* dp->cpu_dp still points to the old CPU port */ + priv->ports[port].pm &= ~PCR_MATRIX(BIT(dp->cpu_dp->index)); + priv->ports[port].pm |= PCR_MATRIX(BIT(new_cpu_dp->index)); + if (priv->ports[port].enable) + regmap_update_bits(priv->regmap, MT7530_PCR_P(port), + PCR_MATRIX_MASK, priv->ports[port].pm); + + mutex_unlock(&priv->reg_mutex); + + mt7530_port_fast_age(ds, port); + + return 0; +} + static void mt753x_conduit_state_change(struct dsa_switch *ds, const struct net_device *conduit,
@@ -3317,6 +3345,7 @@ static const struct dsa_switch_ops mt7530_switch_ops = { .setup = mt753x_setup, .teardown = mt753x_teardown, .preferred_default_local_cpu_port = mt753x_preferred_default_local_cpu_port, + .port_change_conduit = mt753x_port_change_conduit, .get_strings = mt7530_get_strings, .get_ethtool_stats = mt7530_get_ethtool_stats, .get_sset_count = mt7530_get_sset_count,
--
2.54.0