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 <sys/types.h>
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <rdma/ib_addr.h>
37 #include <rdma/ib_cache.h>
38
39 #include <linux/slab.h>
40 #include <linux/string.h>
41 #include <linux/etherdevice.h>
42
43 #include "mlx4_ib.h"
44
create_ib_ah(struct ib_ah * ib_ah,struct ib_ah_attr * ah_attr)45 static int create_ib_ah(struct ib_ah *ib_ah, struct ib_ah_attr *ah_attr)
46 {
47 struct ib_pd *pd = ib_ah->pd;
48 struct mlx4_ib_ah *ah = to_mah(ib_ah);
49 struct mlx4_dev *dev = to_mdev(ib_ah->device)->dev;
50
51 ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
52 ah->av.ib.g_slid = ah_attr->src_path_bits;
53 ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
54 if (ah_attr->ah_flags & IB_AH_GRH) {
55 ah->av.ib.g_slid |= 0x80;
56 ah->av.ib.gid_index = ah_attr->grh.sgid_index;
57 ah->av.ib.hop_limit = ah_attr->grh.hop_limit;
58 ah->av.ib.sl_tclass_flowlabel |=
59 cpu_to_be32((ah_attr->grh.traffic_class << 20) |
60 ah_attr->grh.flow_label);
61 memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16);
62 }
63
64 ah->av.ib.dlid = cpu_to_be16(ah_attr->dlid);
65 if (ah_attr->static_rate) {
66 ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
67 while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
68 !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support))
69 --ah->av.ib.stat_rate;
70 }
71 return 0;
72 }
73
create_iboe_ah(struct ib_ah * ib_ah,struct ib_ah_attr * ah_attr)74 static int create_iboe_ah(struct ib_ah *ib_ah, struct ib_ah_attr *ah_attr)
75 {
76 struct ib_pd *pd = ib_ah->pd;
77 struct mlx4_ib_dev *ibdev = to_mdev(ib_ah->device);
78 struct mlx4_ib_ah *ah = to_mah(ib_ah);
79 struct mlx4_dev *dev = ibdev->dev;
80 int is_mcast = 0;
81 struct in6_addr in6;
82 u16 vlan_tag = 0xffff;
83 union ib_gid sgid;
84 struct ib_gid_attr gid_attr;
85 int ret;
86
87 memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(in6));
88 if (rdma_is_multicast_addr(&in6)) {
89 is_mcast = 1;
90 rdma_get_mcast_mac(&in6, ah->av.eth.mac);
91 } else {
92 memcpy(ah->av.eth.mac, ah_attr->dmac, ETH_ALEN);
93 }
94 ret = ib_get_cached_gid(pd->device, ah_attr->port_num,
95 ah_attr->grh.sgid_index, &sgid, &gid_attr);
96 if (ret)
97 return ret;
98 eth_zero_addr(ah->av.eth.s_mac);
99 if (gid_attr.ndev) {
100 vlan_tag = rdma_vlan_dev_vlan_id(gid_attr.ndev);
101 memcpy(ah->av.eth.s_mac, if_getlladdr(gid_attr.ndev), ETH_ALEN);
102 if_rele(gid_attr.ndev);
103 }
104 if (vlan_tag < 0x1000)
105 vlan_tag |= (ah_attr->sl & 7) << 13;
106 ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
107 ret = mlx4_ib_gid_index_to_real_index(ibdev, ah_attr->port_num, ah_attr->grh.sgid_index);
108 if (ret < 0)
109 return ret;
110 ah->av.eth.gid_index = ret;
111 ah->av.eth.vlan = cpu_to_be16(vlan_tag);
112 ah->av.eth.hop_limit = ah_attr->grh.hop_limit;
113 if (ah_attr->static_rate) {
114 ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
115 while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
116 !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))
117 --ah->av.eth.stat_rate;
118 }
119
120 /*
121 * HW requires multicast LID so we just choose one.
122 */
123 if (is_mcast)
124 ah->av.ib.dlid = cpu_to_be16(0xc000);
125
126 memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16);
127 ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 29);
128
129 return 0;
130 }
131
mlx4_ib_create_ah(struct ib_ah * ib_ah,struct ib_ah_attr * ah_attr,u32 flags,struct ib_udata * udata)132 int mlx4_ib_create_ah(struct ib_ah *ib_ah, struct ib_ah_attr *ah_attr,
133 u32 flags, struct ib_udata *udata)
134 {
135 if (rdma_port_get_link_layer(ib_ah->pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) {
136 if (!(ah_attr->ah_flags & IB_AH_GRH)) {
137 return -EINVAL;
138 } else {
139 /*
140 * TBD: need to handle the case when we get
141 * called in an atomic context and there we
142 * might sleep. We don't expect this
143 * currently since we're working with link
144 * local addresses which we can translate
145 * without going to sleep.
146 */
147 return create_iboe_ah(ib_ah, ah_attr);
148 }
149 }
150 return create_ib_ah(ib_ah, ah_attr);
151 }
152
mlx4_ib_create_ah_slave(struct ib_ah * ah,struct ib_ah_attr * ah_attr,int slave_sgid_index,u8 * s_mac,u16 vlan_tag)153 int mlx4_ib_create_ah_slave(struct ib_ah *ah, struct ib_ah_attr *ah_attr,
154 int slave_sgid_index, u8 *s_mac, u16 vlan_tag)
155 {
156 struct ib_ah_attr slave_attr = *ah_attr;
157 struct mlx4_ib_ah *mah = to_mah(ah);
158 int ret;
159
160 slave_attr.grh.sgid_index = slave_sgid_index;
161 ret = mlx4_ib_create_ah(ah, &slave_attr, 0, NULL);
162 if (ret)
163 return ret;
164
165 /* get rid of force-loopback bit */
166 mah->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);
167
168 if (rdma_port_get_link_layer(ah->pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET)
169 memcpy(mah->av.eth.s_mac, s_mac, 6);
170
171 if (vlan_tag < 0x1000)
172 vlan_tag |= (ah_attr->sl & 7) << 13;
173 mah->av.eth.vlan = cpu_to_be16(vlan_tag);
174
175 return 0;
176 }
177
mlx4_ib_query_ah(struct ib_ah * ibah,struct ib_ah_attr * ah_attr)178 int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
179 {
180 struct mlx4_ib_ah *ah = to_mah(ibah);
181 enum rdma_link_layer ll;
182
183 memset(ah_attr, 0, sizeof *ah_attr);
184 ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
185 ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num);
186 if (ll == IB_LINK_LAYER_ETHERNET)
187 ah_attr->sl = be32_to_cpu(ah->av.eth.sl_tclass_flowlabel) >> 29;
188 else
189 ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
190
191 ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0;
192 if (ah->av.ib.stat_rate)
193 ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET;
194 ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F;
195
196 if (mlx4_ib_ah_grh_present(ah)) {
197 ah_attr->ah_flags = IB_AH_GRH;
198
199 ah_attr->grh.traffic_class =
200 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20;
201 ah_attr->grh.flow_label =
202 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff;
203 ah_attr->grh.hop_limit = ah->av.ib.hop_limit;
204 ah_attr->grh.sgid_index = ah->av.ib.gid_index;
205 memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16);
206 }
207
208 return 0;
209 }
210
mlx4_ib_destroy_ah(struct ib_ah * ah,u32 flags)211 void mlx4_ib_destroy_ah(struct ib_ah *ah, u32 flags)
212 {
213 return;
214 }
215