net: dsa: export bridging offload helpers to drivers

Move the static inline helpers from net/dsa/dsa_priv.h to
include/net/dsa.h, so that drivers can call functions such as
dsa_port_offloads_bridge_dev(), which will be necessary after the
transition to a more complex bridge structure.

More functions than are needed right now are being moved, but this is
done for uniformity.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 18bce0383267..899e13d56fc2 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -620,6 +620,49 @@ static inline bool dsa_port_bridge_same(const struct dsa_port *a,
 	return (!br_a || !br_b) ? false : (br_a == br_b);
 }
 
+static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
+						 const struct net_device *dev)
+{
+	return dsa_port_to_bridge_port(dp) == dev;
+}
+
+static inline bool
+dsa_port_offloads_bridge_dev(struct dsa_port *dp,
+			     const struct net_device *bridge_dev)
+{
+	/* DSA ports connected to a bridge, and event was emitted
+	 * for the bridge.
+	 */
+	return dsa_port_bridge_dev_get(dp) == bridge_dev;
+}
+
+/* Returns true if any port of this tree offloads the given net_device */
+static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
+						 const struct net_device *dev)
+{
+	struct dsa_port *dp;
+
+	list_for_each_entry(dp, &dst->ports, list)
+		if (dsa_port_offloads_bridge_port(dp, dev))
+			return true;
+
+	return false;
+}
+
+/* Returns true if any port of this tree offloads the given bridge */
+static inline bool
+dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst,
+			     const struct net_device *bridge_dev)
+{
+	struct dsa_port *dp;
+
+	list_for_each_entry(dp, &dst->ports, list)
+		if (dsa_port_offloads_bridge_dev(dp, bridge_dev))
+			return true;
+
+	return false;
+}
+
 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
 			      bool is_static, void *data);
 struct dsa_switch_ops {