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1/*
2 * Copyright (c) 2013-2015, Mellanox Technologies. 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 "mlx5_ib.h"
34
35static __be16 mlx5_ah_get_udp_sport(const struct mlx5_ib_dev *dev,
36 const struct rdma_ah_attr *ah_attr)
37{
38 enum ib_gid_type gid_type = ah_attr->grh.sgid_attr->gid_type;
39 __be16 sport;
40
41 if ((gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) &&
42 (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) &&
43 (ah_attr->grh.flow_label & IB_GRH_FLOWLABEL_MASK))
44 sport = cpu_to_be16(
45 rdma_flow_label_to_udp_sport(ah_attr->grh.flow_label));
46 else
47 sport = mlx5_get_roce_udp_sport_min(dev,
48 ah_attr->grh.sgid_attr);
49
50 return sport;
51}
52
53static void create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah,
54 struct rdma_ah_init_attr *init_attr)
55{
56 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
57 enum ib_gid_type gid_type;
58
59 if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
60 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
61
62 memcpy(ah->av.rgid, &grh->dgid, 16);
63 ah->av.grh_gid_fl = cpu_to_be32(grh->flow_label |
64 (1 << 30) |
65 grh->sgid_index << 20);
66 ah->av.hop_limit = grh->hop_limit;
67 ah->av.tclass = grh->traffic_class;
68 }
69
70 ah->av.stat_rate_sl = (rdma_ah_get_static_rate(ah_attr) << 4);
71
72 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
73 if (init_attr->xmit_slave)
74 ah->xmit_port =
75 mlx5_lag_get_slave_port(dev->mdev,
76 init_attr->xmit_slave);
77 gid_type = ah_attr->grh.sgid_attr->gid_type;
78
79 memcpy(ah->av.rmac, ah_attr->roce.dmac,
80 sizeof(ah_attr->roce.dmac));
81 ah->av.udp_sport = mlx5_ah_get_udp_sport(dev, ah_attr);
82 ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0x7) << 1;
83 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
84#define MLX5_ECN_ENABLED BIT(1)
85 ah->av.tclass |= MLX5_ECN_ENABLED;
86 } else {
87 ah->av.rlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
88 ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f;
89 ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf);
90 }
91}
92
93int mlx5_ib_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
94 struct ib_udata *udata)
95
96{
97 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
98 struct mlx5_ib_ah *ah = to_mah(ibah);
99 struct mlx5_ib_dev *dev = to_mdev(ibah->device);
100 enum rdma_ah_attr_type ah_type = ah_attr->type;
101
102 if ((ah_type == RDMA_AH_ATTR_TYPE_ROCE) &&
103 !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
104 return -EINVAL;
105
106 if (ah_type == RDMA_AH_ATTR_TYPE_ROCE && udata) {
107 int err;
108 struct mlx5_ib_create_ah_resp resp = {};
109 u32 min_resp_len =
110 offsetofend(struct mlx5_ib_create_ah_resp, dmac);
111
112 if (udata->outlen < min_resp_len)
113 return -EINVAL;
114
115 resp.response_length = min_resp_len;
116
117 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
118 err = ib_copy_to_udata(udata, &resp, resp.response_length);
119 if (err)
120 return err;
121 }
122
123 create_ib_ah(dev, ah, init_attr);
124 return 0;
125}
126
127int mlx5_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
128{
129 struct mlx5_ib_ah *ah = to_mah(ibah);
130 u32 tmp;
131
132 memset(ah_attr, 0, sizeof(*ah_attr));
133 ah_attr->type = ibah->type;
134
135 tmp = be32_to_cpu(ah->av.grh_gid_fl);
136 if (tmp & (1 << 30)) {
137 rdma_ah_set_grh(ah_attr, NULL,
138 tmp & 0xfffff,
139 (tmp >> 20) & 0xff,
140 ah->av.hop_limit,
141 ah->av.tclass);
142 rdma_ah_set_dgid_raw(ah_attr, ah->av.rgid);
143 }
144 rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.rlid));
145 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate_sl >> 4);
146 rdma_ah_set_sl(ah_attr, ah->av.stat_rate_sl & 0xf);
147
148 return 0;
149}
1/*
2 * Copyright (c) 2013-2015, Mellanox Technologies. 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 "mlx5_ib.h"
34
35static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev,
36 struct mlx5_ib_ah *ah,
37 struct rdma_ah_attr *ah_attr)
38{
39 enum ib_gid_type gid_type;
40 int err;
41
42 if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
43 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
44
45 memcpy(ah->av.rgid, &grh->dgid, 16);
46 ah->av.grh_gid_fl = cpu_to_be32(grh->flow_label |
47 (1 << 30) |
48 grh->sgid_index << 20);
49 ah->av.hop_limit = grh->hop_limit;
50 ah->av.tclass = grh->traffic_class;
51 }
52
53 ah->av.stat_rate_sl = (rdma_ah_get_static_rate(ah_attr) << 4);
54
55 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
56 err = mlx5_get_roce_gid_type(dev, ah_attr->port_num,
57 ah_attr->grh.sgid_index,
58 &gid_type);
59 if (err)
60 return ERR_PTR(err);
61
62 memcpy(ah->av.rmac, ah_attr->roce.dmac,
63 sizeof(ah_attr->roce.dmac));
64 ah->av.udp_sport =
65 mlx5_get_roce_udp_sport(dev,
66 rdma_ah_get_port_num(ah_attr),
67 rdma_ah_read_grh(ah_attr)->sgid_index);
68 ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0x7) << 1;
69 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
70#define MLX5_ECN_ENABLED BIT(1)
71 ah->av.tclass |= MLX5_ECN_ENABLED;
72 } else {
73 ah->av.rlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
74 ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f;
75 ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf);
76 }
77
78 return &ah->ibah;
79}
80
81struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
82 struct ib_udata *udata)
83
84{
85 struct mlx5_ib_ah *ah;
86 struct mlx5_ib_dev *dev = to_mdev(pd->device);
87 enum rdma_ah_attr_type ah_type = ah_attr->type;
88
89 if ((ah_type == RDMA_AH_ATTR_TYPE_ROCE) &&
90 !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
91 return ERR_PTR(-EINVAL);
92
93 if (ah_type == RDMA_AH_ATTR_TYPE_ROCE && udata) {
94 int err;
95 struct mlx5_ib_create_ah_resp resp = {};
96 u32 min_resp_len = offsetof(typeof(resp), dmac) +
97 sizeof(resp.dmac);
98
99 if (udata->outlen < min_resp_len)
100 return ERR_PTR(-EINVAL);
101
102 resp.response_length = min_resp_len;
103
104 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
105 err = ib_copy_to_udata(udata, &resp, resp.response_length);
106 if (err)
107 return ERR_PTR(err);
108 }
109
110 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
111 if (!ah)
112 return ERR_PTR(-ENOMEM);
113
114 return create_ib_ah(dev, ah, ah_attr); /* never fails */
115}
116
117int mlx5_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
118{
119 struct mlx5_ib_ah *ah = to_mah(ibah);
120 u32 tmp;
121
122 memset(ah_attr, 0, sizeof(*ah_attr));
123 ah_attr->type = ibah->type;
124
125 tmp = be32_to_cpu(ah->av.grh_gid_fl);
126 if (tmp & (1 << 30)) {
127 rdma_ah_set_grh(ah_attr, NULL,
128 tmp & 0xfffff,
129 (tmp >> 20) & 0xff,
130 ah->av.hop_limit,
131 ah->av.tclass);
132 rdma_ah_set_dgid_raw(ah_attr, ah->av.rgid);
133 }
134 rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.rlid));
135 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate_sl >> 4);
136 rdma_ah_set_sl(ah_attr, ah->av.stat_rate_sl & 0xf);
137
138 return 0;
139}
140
141int mlx5_ib_destroy_ah(struct ib_ah *ah)
142{
143 kfree(to_mah(ah));
144 return 0;
145}