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1 | /* |
2 | * Copyright (c) 2007 Cisco Systems, 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 "mlx4_ib.h" | |
34 | ||
35 | struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) | |
36 | { | |
37 | struct mlx4_dev *dev = to_mdev(pd->device)->dev; | |
38 | struct mlx4_ib_ah *ah; | |
39 | ||
40 | ah = kmalloc(sizeof *ah, GFP_ATOMIC); | |
41 | if (!ah) | |
42 | return ERR_PTR(-ENOMEM); | |
43 | ||
44 | memset(&ah->av, 0, sizeof ah->av); | |
45 | ||
46 | ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); | |
47 | ah->av.g_slid = ah_attr->src_path_bits; | |
48 | ah->av.dlid = cpu_to_be16(ah_attr->dlid); | |
49 | if (ah_attr->static_rate) { | |
50 | ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; | |
51 | while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && | |
52 | !(1 << ah->av.stat_rate & dev->caps.stat_rate_support)) | |
53 | --ah->av.stat_rate; | |
54 | } | |
55 | ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); | |
56 | if (ah_attr->ah_flags & IB_AH_GRH) { | |
57 | ah->av.g_slid |= 0x80; | |
58 | ah->av.gid_index = ah_attr->grh.sgid_index; | |
59 | ah->av.hop_limit = ah_attr->grh.hop_limit; | |
60 | ah->av.sl_tclass_flowlabel |= | |
61 | cpu_to_be32((ah_attr->grh.traffic_class << 20) | | |
62 | ah_attr->grh.flow_label); | |
63 | memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16); | |
64 | } | |
65 | ||
66 | return &ah->ibah; | |
67 | } | |
68 | ||
69 | int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) | |
70 | { | |
71 | struct mlx4_ib_ah *ah = to_mah(ibah); | |
72 | ||
73 | memset(ah_attr, 0, sizeof *ah_attr); | |
74 | ah_attr->dlid = be16_to_cpu(ah->av.dlid); | |
75 | ah_attr->sl = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28; | |
76 | ah_attr->port_num = be32_to_cpu(ah->av.port_pd) >> 24; | |
77 | if (ah->av.stat_rate) | |
78 | ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET; | |
79 | ah_attr->src_path_bits = ah->av.g_slid & 0x7F; | |
80 | ||
81 | if (mlx4_ib_ah_grh_present(ah)) { | |
82 | ah_attr->ah_flags = IB_AH_GRH; | |
83 | ||
84 | ah_attr->grh.traffic_class = | |
85 | be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20; | |
86 | ah_attr->grh.flow_label = | |
87 | be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff; | |
88 | ah_attr->grh.hop_limit = ah->av.hop_limit; | |
89 | ah_attr->grh.sgid_index = ah->av.gid_index; | |
90 | memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, 16); | |
91 | } | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | int mlx4_ib_destroy_ah(struct ib_ah *ah) | |
97 | { | |
98 | kfree(to_mah(ah)); | |
99 | return 0; | |
100 | } |