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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 | ||
2811ba51 AS |
35 | static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev, |
36 | struct mlx5_ib_ah *ah, | |
37 | struct ib_ah_attr *ah_attr, | |
38 | enum rdma_link_layer ll) | |
e126ba97 EC |
39 | { |
40 | if (ah_attr->ah_flags & IB_AH_GRH) { | |
41 | memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16); | |
42 | ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label | | |
43 | (1 << 30) | | |
44 | ah_attr->grh.sgid_index << 20); | |
45 | ah->av.hop_limit = ah_attr->grh.hop_limit; | |
46 | ah->av.tclass = ah_attr->grh.traffic_class; | |
47 | } | |
48 | ||
2811ba51 AS |
49 | ah->av.stat_rate_sl = (ah_attr->static_rate << 4); |
50 | ||
51 | if (ll == IB_LINK_LAYER_ETHERNET) { | |
52 | memcpy(ah->av.rmac, ah_attr->dmac, sizeof(ah_attr->dmac)); | |
53 | ah->av.udp_sport = | |
54 | mlx5_get_roce_udp_sport(dev, | |
55 | ah_attr->port_num, | |
56 | ah_attr->grh.sgid_index); | |
57 | ah->av.stat_rate_sl |= (ah_attr->sl & 0x7) << 1; | |
58 | } else { | |
59 | ah->av.rlid = cpu_to_be16(ah_attr->dlid); | |
60 | ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f; | |
61 | ah->av.stat_rate_sl |= (ah_attr->sl & 0xf); | |
62 | } | |
e126ba97 EC |
63 | |
64 | return &ah->ibah; | |
65 | } | |
66 | ||
67 | struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) | |
68 | { | |
69 | struct mlx5_ib_ah *ah; | |
2811ba51 AS |
70 | struct mlx5_ib_dev *dev = to_mdev(pd->device); |
71 | enum rdma_link_layer ll; | |
72 | ||
73 | ll = pd->device->get_link_layer(pd->device, ah_attr->port_num); | |
74 | ||
75 | if (ll == IB_LINK_LAYER_ETHERNET && !(ah_attr->ah_flags & IB_AH_GRH)) | |
76 | return ERR_PTR(-EINVAL); | |
e126ba97 EC |
77 | |
78 | ah = kzalloc(sizeof(*ah), GFP_ATOMIC); | |
79 | if (!ah) | |
80 | return ERR_PTR(-ENOMEM); | |
81 | ||
2811ba51 | 82 | return create_ib_ah(dev, ah, ah_attr, ll); /* never fails */ |
e126ba97 EC |
83 | } |
84 | ||
85 | int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) | |
86 | { | |
87 | struct mlx5_ib_ah *ah = to_mah(ibah); | |
88 | u32 tmp; | |
89 | ||
90 | memset(ah_attr, 0, sizeof(*ah_attr)); | |
91 | ||
92 | tmp = be32_to_cpu(ah->av.grh_gid_fl); | |
93 | if (tmp & (1 << 30)) { | |
94 | ah_attr->ah_flags = IB_AH_GRH; | |
95 | ah_attr->grh.sgid_index = (tmp >> 20) & 0xff; | |
96 | ah_attr->grh.flow_label = tmp & 0xfffff; | |
97 | memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16); | |
98 | ah_attr->grh.hop_limit = ah->av.hop_limit; | |
99 | ah_attr->grh.traffic_class = ah->av.tclass; | |
100 | } | |
101 | ah_attr->dlid = be16_to_cpu(ah->av.rlid); | |
102 | ah_attr->static_rate = ah->av.stat_rate_sl >> 4; | |
103 | ah_attr->sl = ah->av.stat_rate_sl & 0xf; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | int mlx5_ib_destroy_ah(struct ib_ah *ah) | |
109 | { | |
110 | kfree(to_mah(ah)); | |
111 | return 0; | |
112 | } |