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225c7b1f RD |
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 | ||
fa417f7b | 33 | #include <rdma/ib_addr.h> |
4c3eb3ca | 34 | #include <rdma/ib_cache.h> |
fa417f7b | 35 | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
fa417f7b EC |
37 | #include <linux/inet.h> |
38 | #include <linux/string.h> | |
5a0e3ad6 | 39 | |
225c7b1f RD |
40 | #include "mlx4_ib.h" |
41 | ||
fa417f7b EC |
42 | static struct ib_ah *create_ib_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, |
43 | struct mlx4_ib_ah *ah) | |
44 | { | |
45 | struct mlx4_dev *dev = to_mdev(pd->device)->dev; | |
46 | ||
47 | ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); | |
48 | ah->av.ib.g_slid = ah_attr->src_path_bits; | |
225c7b1f | 49 | if (ah_attr->ah_flags & IB_AH_GRH) { |
fa417f7b EC |
50 | ah->av.ib.g_slid |= 0x80; |
51 | ah->av.ib.gid_index = ah_attr->grh.sgid_index; | |
52 | ah->av.ib.hop_limit = ah_attr->grh.hop_limit; | |
53 | ah->av.ib.sl_tclass_flowlabel |= | |
225c7b1f RD |
54 | cpu_to_be32((ah_attr->grh.traffic_class << 20) | |
55 | ah_attr->grh.flow_label); | |
fa417f7b EC |
56 | memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16); |
57 | } | |
58 | ||
59 | ah->av.ib.dlid = cpu_to_be16(ah_attr->dlid); | |
60 | if (ah_attr->static_rate) { | |
61 | ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; | |
62 | while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && | |
63 | !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support)) | |
64 | --ah->av.ib.stat_rate; | |
225c7b1f | 65 | } |
fa417f7b | 66 | ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); |
225c7b1f RD |
67 | |
68 | return &ah->ibah; | |
69 | } | |
70 | ||
fa417f7b EC |
71 | static struct ib_ah *create_iboe_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, |
72 | struct mlx4_ib_ah *ah) | |
73 | { | |
74 | struct mlx4_ib_dev *ibdev = to_mdev(pd->device); | |
75 | struct mlx4_dev *dev = ibdev->dev; | |
fa417f7b | 76 | int is_mcast; |
297e0dad | 77 | struct in6_addr in6; |
4c3eb3ca | 78 | u16 vlan_tag; |
fa417f7b | 79 | |
297e0dad MS |
80 | memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(in6)); |
81 | if (rdma_is_multicast_addr(&in6)) { | |
82 | is_mcast = 1; | |
83 | rdma_get_mcast_mac(&in6, ah->av.eth.mac); | |
84 | } else { | |
85 | memcpy(ah->av.eth.mac, ah_attr->dmac, ETH_ALEN); | |
86 | } | |
87 | vlan_tag = ah_attr->vlan_id; | |
4c3eb3ca EC |
88 | if (vlan_tag < 0x1000) |
89 | vlan_tag |= (ah_attr->sl & 7) << 13; | |
fa417f7b EC |
90 | ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); |
91 | ah->av.eth.gid_index = ah_attr->grh.sgid_index; | |
4c3eb3ca | 92 | ah->av.eth.vlan = cpu_to_be16(vlan_tag); |
fa417f7b EC |
93 | if (ah_attr->static_rate) { |
94 | ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; | |
95 | while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && | |
96 | !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support)) | |
97 | --ah->av.eth.stat_rate; | |
98 | } | |
99 | ||
100 | /* | |
101 | * HW requires multicast LID so we just choose one. | |
102 | */ | |
103 | if (is_mcast) | |
104 | ah->av.ib.dlid = cpu_to_be16(0xc000); | |
105 | ||
106 | memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16); | |
9106c410 | 107 | ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 29); |
fa417f7b EC |
108 | |
109 | return &ah->ibah; | |
110 | } | |
111 | ||
112 | struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) | |
113 | { | |
114 | struct mlx4_ib_ah *ah; | |
115 | struct ib_ah *ret; | |
116 | ||
117 | ah = kzalloc(sizeof *ah, GFP_ATOMIC); | |
118 | if (!ah) | |
119 | return ERR_PTR(-ENOMEM); | |
120 | ||
121 | if (rdma_port_get_link_layer(pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) { | |
122 | if (!(ah_attr->ah_flags & IB_AH_GRH)) { | |
123 | ret = ERR_PTR(-EINVAL); | |
124 | } else { | |
125 | /* | |
126 | * TBD: need to handle the case when we get | |
127 | * called in an atomic context and there we | |
128 | * might sleep. We don't expect this | |
129 | * currently since we're working with link | |
130 | * local addresses which we can translate | |
131 | * without going to sleep. | |
132 | */ | |
133 | ret = create_iboe_ah(pd, ah_attr, ah); | |
134 | } | |
135 | ||
136 | if (IS_ERR(ret)) | |
137 | kfree(ah); | |
138 | ||
139 | return ret; | |
140 | } else | |
141 | return create_ib_ah(pd, ah_attr, ah); /* never fails */ | |
142 | } | |
143 | ||
225c7b1f RD |
144 | int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) |
145 | { | |
146 | struct mlx4_ib_ah *ah = to_mah(ibah); | |
fa417f7b | 147 | enum rdma_link_layer ll; |
225c7b1f RD |
148 | |
149 | memset(ah_attr, 0, sizeof *ah_attr); | |
fa417f7b EC |
150 | ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; |
151 | ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24; | |
152 | ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num); | |
153 | ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0; | |
154 | if (ah->av.ib.stat_rate) | |
155 | ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET; | |
156 | ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F; | |
225c7b1f RD |
157 | |
158 | if (mlx4_ib_ah_grh_present(ah)) { | |
159 | ah_attr->ah_flags = IB_AH_GRH; | |
160 | ||
161 | ah_attr->grh.traffic_class = | |
fa417f7b | 162 | be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20; |
225c7b1f | 163 | ah_attr->grh.flow_label = |
fa417f7b EC |
164 | be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff; |
165 | ah_attr->grh.hop_limit = ah->av.ib.hop_limit; | |
166 | ah_attr->grh.sgid_index = ah->av.ib.gid_index; | |
167 | memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16); | |
225c7b1f RD |
168 | } |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | int mlx4_ib_destroy_ah(struct ib_ah *ah) | |
174 | { | |
175 | kfree(to_mah(ah)); | |
176 | return 0; | |
177 | } |