int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah);
int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
struct ib_ud_header *header);
+int mthca_ah_grh_present(struct mthca_ah *ah);
int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);