1 /* 2 * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include "mlx5_ib.h" 34 35 struct ib_ah *create_ib_ah(struct ib_ah_attr *ah_attr, 36 struct mlx5_ib_ah *ah) 37 { 38 if (ah_attr->ah_flags & IB_AH_GRH) { 39 memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16); 40 ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label | 41 (1 << 30) | 42 ah_attr->grh.sgid_index << 20); 43 ah->av.hop_limit = ah_attr->grh.hop_limit; 44 ah->av.tclass = ah_attr->grh.traffic_class; 45 } 46 47 ah->av.rlid = cpu_to_be16(ah_attr->dlid); 48 ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f; 49 ah->av.stat_rate_sl = (ah_attr->static_rate << 4) | (ah_attr->sl & 0xf); 50 51 return &ah->ibah; 52 } 53 54 struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 55 { 56 struct mlx5_ib_ah *ah; 57 58 ah = kzalloc(sizeof(*ah), GFP_ATOMIC); 59 if (!ah) 60 return ERR_PTR(-ENOMEM); 61 62 return create_ib_ah(ah_attr, ah); /* never fails */ 63 } 64 65 int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) 66 { 67 struct mlx5_ib_ah *ah = to_mah(ibah); 68 u32 tmp; 69 70 memset(ah_attr, 0, sizeof(*ah_attr)); 71 72 tmp = be32_to_cpu(ah->av.grh_gid_fl); 73 if (tmp & (1 << 30)) { 74 ah_attr->ah_flags = IB_AH_GRH; 75 ah_attr->grh.sgid_index = (tmp >> 20) & 0xff; 76 ah_attr->grh.flow_label = tmp & 0xfffff; 77 memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16); 78 ah_attr->grh.hop_limit = ah->av.hop_limit; 79 ah_attr->grh.traffic_class = ah->av.tclass; 80 } 81 ah_attr->dlid = be16_to_cpu(ah->av.rlid); 82 ah_attr->static_rate = ah->av.stat_rate_sl >> 4; 83 ah_attr->sl = ah->av.stat_rate_sl & 0xf; 84 85 return 0; 86 } 87 88 int mlx5_ib_destroy_ah(struct ib_ah *ah) 89 { 90 kfree(to_mah(ah)); 91 return 0; 92 } 93