2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
35 struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
37 struct mlx4_dev *dev = to_mdev(pd->device)->dev;
38 struct mlx4_ib_ah *ah;
40 ah = kmalloc(sizeof *ah, GFP_ATOMIC);
42 return ERR_PTR(-ENOMEM);
44 memset(&ah->av, 0, sizeof ah->av);
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))
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);
69 int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
71 struct mlx4_ib_ah *ah = to_mah(ibah);
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;
78 ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET;
79 ah_attr->src_path_bits = ah->av.g_slid & 0x7F;
81 if (mlx4_ib_ah_grh_present(ah)) {
82 ah_attr->ah_flags = IB_AH_GRH;
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);
96 int mlx4_ib_destroy_ah(struct ib_ah *ah)