static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah, struct rdma_ah_attr *ah_attr) { enum ib_gid_type gid_type; int err; if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr); memcpy(ah->av.rgid, &grh->dgid, 16); ah->av.grh_gid_fl = cpu_to_be32(grh->flow_label | (1 << 30) | grh->sgid_index << 20); ah->av.hop_limit = grh->hop_limit; ah->av.tclass = grh->traffic_class; } ah->av.stat_rate_sl = (rdma_ah_get_static_rate(ah_attr) << 4); if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) { err = mlx5_get_roce_gid_type(dev, ah_attr->port_num, ah_attr->grh.sgid_index, &gid_type); if (err) return ERR_PTR(err); memcpy(ah->av.rmac, ah_attr->roce.dmac, sizeof(ah_attr->roce.dmac)); ah->av.udp_sport = mlx5_get_roce_udp_sport(dev, rdma_ah_get_port_num(ah_attr), rdma_ah_read_grh(ah_attr)->sgid_index); ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0x7) << 1; if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) #define MLX5_ECN_ENABLED BIT(1) ah->av.tclass |= MLX5_ECN_ENABLED; } else { ah->av.rlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr)); ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f; ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf); } return &ah->ibah; }
/** * pvrdma_create_ah - create an address handle * @pd: the protection domain * @ah_attr: the attributes of the AH * @udata: user data blob * * @return: the ib_ah pointer on success, otherwise errno. */ struct ib_ah *pvrdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr, struct ib_udata *udata) { struct pvrdma_dev *dev = to_vdev(pd->device); struct pvrdma_ah *ah; const struct ib_global_route *grh; u8 port_num = rdma_ah_get_port_num(ah_attr); if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) return ERR_PTR(-EINVAL); grh = rdma_ah_read_grh(ah_attr); if ((ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE) || rdma_is_multicast_addr((struct in6_addr *)grh->dgid.raw)) return ERR_PTR(-EINVAL); if (!atomic_add_unless(&dev->num_ahs, 1, dev->dsr->caps.max_ah)) return ERR_PTR(-ENOMEM); ah = kzalloc(sizeof(*ah), GFP_KERNEL); if (!ah) { atomic_dec(&dev->num_ahs); return ERR_PTR(-ENOMEM); } ah->av.port_pd = to_vpd(pd)->pd_handle | (port_num << 24); ah->av.src_path_bits = rdma_ah_get_path_bits(ah_attr); ah->av.src_path_bits |= 0x80; ah->av.gid_index = grh->sgid_index; ah->av.hop_limit = grh->hop_limit; ah->av.sl_tclass_flowlabel = (grh->traffic_class << 20) | grh->flow_label; memcpy(ah->av.dgid, grh->dgid.raw, 16); memcpy(ah->av.dmac, ah_attr->roce.dmac, ETH_ALEN); ah->ibah.device = pd->device; ah->ibah.pd = pd; ah->ibah.uobject = NULL; return &ah->ibah; }