diff options
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/dsa.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h index ea47783d5695..5f632cfd33c7 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -491,6 +491,32 @@ static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); } +/* Return true if this is the local port used to reach the CPU port */ +static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port) +{ + if (dsa_is_unused_port(ds, port)) + return false; + + return port == dsa_upstream_port(ds, port); +} + +/* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning + * that the routing port from @downstream_ds to @upstream_ds is also the port + * which @downstream_ds uses to reach its dedicated CPU. + */ +static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds, + struct dsa_switch *downstream_ds) +{ + int routing_port; + + if (upstream_ds == downstream_ds) + return true; + + routing_port = dsa_routing_port(downstream_ds, upstream_ds->index); + + return dsa_is_upstream_port(downstream_ds, routing_port); +} + static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) { const struct dsa_switch *ds = dp->ds; |