| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2013-2015, Mellanox Technologies. 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 | } |