|
| 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 | +} |
0 commit comments