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e126ba97 | 1 | /* |
6cf0a15f | 2 | * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. |
e126ba97 EC |
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 | } |