| /* |
| * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include "mlx5_ib.h" |
| |
| static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev, |
| struct mlx5_ib_ah *ah, |
| struct ib_ah_attr *ah_attr, |
| enum rdma_link_layer ll) |
| { |
| if (ah_attr->ah_flags & IB_AH_GRH) { |
| memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16); |
| ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label | |
| (1 << 30) | |
| ah_attr->grh.sgid_index << 20); |
| ah->av.hop_limit = ah_attr->grh.hop_limit; |
| ah->av.tclass = ah_attr->grh.traffic_class; |
| } |
| |
| ah->av.stat_rate_sl = (ah_attr->static_rate << 4); |
| |
| if (ll == IB_LINK_LAYER_ETHERNET) { |
| memcpy(ah->av.rmac, ah_attr->dmac, sizeof(ah_attr->dmac)); |
| ah->av.udp_sport = |
| mlx5_get_roce_udp_sport(dev, |
| ah_attr->port_num, |
| ah_attr->grh.sgid_index); |
| ah->av.stat_rate_sl |= (ah_attr->sl & 0x7) << 1; |
| } else { |
| ah->av.rlid = cpu_to_be16(ah_attr->dlid); |
| ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f; |
| ah->av.stat_rate_sl |= (ah_attr->sl & 0xf); |
| } |
| |
| return &ah->ibah; |
| } |
| |
| struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, |
| struct ib_udata *udata) |
| |
| { |
| struct mlx5_ib_ah *ah; |
| struct mlx5_ib_dev *dev = to_mdev(pd->device); |
| enum rdma_link_layer ll; |
| |
| ll = pd->device->get_link_layer(pd->device, ah_attr->port_num); |
| |
| if (ll == IB_LINK_LAYER_ETHERNET && !(ah_attr->ah_flags & IB_AH_GRH)) |
| return ERR_PTR(-EINVAL); |
| |
| if (ll == IB_LINK_LAYER_ETHERNET && udata) { |
| int err; |
| struct mlx5_ib_create_ah_resp resp = {}; |
| u32 min_resp_len = offsetof(typeof(resp), dmac) + |
| sizeof(resp.dmac); |
| |
| if (udata->outlen < min_resp_len) |
| return ERR_PTR(-EINVAL); |
| |
| resp.response_length = min_resp_len; |
| |
| err = ib_resolve_eth_dmac(pd->device, ah_attr); |
| if (err) |
| return ERR_PTR(err); |
| |
| memcpy(resp.dmac, ah_attr->dmac, ETH_ALEN); |
| err = ib_copy_to_udata(udata, &resp, resp.response_length); |
| if (err) |
| return ERR_PTR(err); |
| } |
| |
| ah = kzalloc(sizeof(*ah), GFP_ATOMIC); |
| if (!ah) |
| return ERR_PTR(-ENOMEM); |
| |
| return create_ib_ah(dev, ah, ah_attr, ll); /* never fails */ |
| } |
| |
| int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) |
| { |
| struct mlx5_ib_ah *ah = to_mah(ibah); |
| u32 tmp; |
| |
| memset(ah_attr, 0, sizeof(*ah_attr)); |
| |
| tmp = be32_to_cpu(ah->av.grh_gid_fl); |
| if (tmp & (1 << 30)) { |
| ah_attr->ah_flags = IB_AH_GRH; |
| ah_attr->grh.sgid_index = (tmp >> 20) & 0xff; |
| ah_attr->grh.flow_label = tmp & 0xfffff; |
| memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16); |
| ah_attr->grh.hop_limit = ah->av.hop_limit; |
| ah_attr->grh.traffic_class = ah->av.tclass; |
| } |
| ah_attr->dlid = be16_to_cpu(ah->av.rlid); |
| ah_attr->static_rate = ah->av.stat_rate_sl >> 4; |
| ah_attr->sl = ah->av.stat_rate_sl & 0xf; |
| |
| return 0; |
| } |
| |
| int mlx5_ib_destroy_ah(struct ib_ah *ah) |
| { |
| kfree(to_mah(ah)); |
| return 0; |
| } |