1 files changed, 16 insertions, 0 deletions

diff --git a/include/rdma/opa_addr.h b/include/rdma/opa_addr.h
index f68fca296631..2bbb7a67e643 100644
--- a/include/rdma/opa_addr.h
+++ b/include/rdma/opa_addr.h
@@ -114,4 +114,20 @@ static inline u32 opa_get_mcast_base(u32 nr_top_bits)
         return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
 }
 
+/* Check for a valid unicast LID for non-SM traffic types */
+static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr)
+{
+        if (attr->type == RDMA_AH_ATTR_TYPE_IB) {
+                if (!rdma_ah_get_dlid(attr) ||
+                    rdma_ah_get_dlid(attr) >=
+                    be32_to_cpu(IB_MULTICAST_LID_BASE))
+                        return false;
+        } else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) {
+                if (!rdma_ah_get_dlid(attr) ||
+                    rdma_ah_get_dlid(attr) >=
+                    opa_get_mcast_base(OPA_MCAST_NR))
+                        return false;
+        }
+        return true;
+}
 #endif /* OPA_ADDR_H */