Re: [PATCH v2 net-next 07/10] net: dsa: Pass MST state changes to driver
From: Vladimir Oltean <olteanv@gmail.com>
Date: 2022-03-03 22:21:05
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bridge, lkml
On Tue, Mar 01, 2022 at 11:03:18AM +0100, Tobias Waldekranz wrote:
quoted hunk ↗ jump to hunk
Add the usual trampoline functionality from the generic DSA layer down to the drivers for MST state changes. Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com> --- include/net/dsa.h | 2 ++ net/dsa/dsa_priv.h | 2 ++ net/dsa/port.c | 30 ++++++++++++++++++++++++++++++ net/dsa/slave.c | 6 ++++++ 4 files changed, 40 insertions(+)diff --git a/include/net/dsa.h b/include/net/dsa.h index cc8acb01bd9b..096e6e3a8e1e 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h@@ -943,6 +943,8 @@ struct dsa_switch_ops { struct dsa_bridge bridge); void (*port_stp_state_set)(struct dsa_switch *ds, int port, u8 state); + int (*port_mst_state_set)(struct dsa_switch *ds, int port, + const struct switchdev_mst_state *state); void (*port_fast_age)(struct dsa_switch *ds, int port); int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port, struct switchdev_brport_flags flags,diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h index 87ec0697e92e..a620e079ebc5 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h@@ -198,6 +198,8 @@ static inline struct net_device *dsa_master_find_slave(struct net_device *dev, void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp, const struct dsa_device_ops *tag_ops); int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age); +int dsa_port_set_mst_state(struct dsa_port *dp, + const struct switchdev_mst_state *state); int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy); int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy); void dsa_port_disable_rt(struct dsa_port *dp);diff --git a/net/dsa/port.c b/net/dsa/port.c index 5f45cb7d70ba..26cfbc8ab499 100644 --- a/net/dsa/port.c +++ b/net/dsa/port.c@@ -108,6 +108,36 @@ int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age) return 0; } +int dsa_port_set_mst_state(struct dsa_port *dp, + const struct switchdev_mst_state *state) +{ + struct dsa_switch *ds = dp->ds; + int err, port = dp->index; + + if (!ds->ops->port_mst_state_set) + return -EOPNOTSUPP; + + err = ds->ops->port_mst_state_set(ds, port, state); + if (err) + return err; + + if (!dsa_port_can_configure_learning(dp) || dp->learning) { + switch (state->state) { + case BR_STATE_DISABLED: + case BR_STATE_BLOCKING: + case BR_STATE_LISTENING: + /* Ideally we would only fast age entries + * belonging to VLANs controlled by this + * MST. + */ + dsa_port_fast_age(dp);
Does mv88e6xxx support this? If it does, you might just as well introduce another variant of ds->ops->port_fast_age() for an msti. And since it is new code, you could require that drivers _do_ support configuring learning before they could support MSTP. After all, we don't want to keep legacy mechanisms in place forever.
quoted hunk ↗ jump to hunk
+ break; + } + } + + return 0; +} + static void dsa_port_set_state_now(struct dsa_port *dp, u8 state, bool do_fast_age) {diff --git a/net/dsa/slave.c b/net/dsa/slave.c index c6ffcd782b5a..32b006a5b778 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c@@ -288,6 +288,12 @@ static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, ret = dsa_port_set_state(dp, attr->u.stp_state, true); break; + case SWITCHDEV_ATTR_ID_PORT_MST_STATE: + if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) + return -EOPNOTSUPP; + + ret = dsa_port_set_mst_state(dp, &attr->u.mst_state); + break; case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) return -EOPNOTSUPP;-- 2.25.1