1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "mlx5_ib.h"
static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev,
struct mlx5_ib_ah *ah,
struct rdma_ah_attr *ah_attr)
{
if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
memcpy(ah->av.rgid, &grh->dgid, 16);
ah->av.grh_gid_fl = cpu_to_be32(grh->flow_label |
(1 << 30) |
grh->sgid_index << 20);
ah->av.hop_limit = grh->hop_limit;
ah->av.tclass = grh->traffic_class;
}
ah->av.stat_rate_sl = (rdma_ah_get_static_rate(ah_attr) << 4);
if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
memcpy(ah->av.rmac, ah_attr->roce.dmac,
sizeof(ah_attr->roce.dmac));
ah->av.udp_sport =
mlx5_get_roce_udp_sport(dev,
rdma_ah_get_port_num(ah_attr),
rdma_ah_read_grh(ah_attr)->sgid_index);
ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0x7) << 1;
} else {
ah->av.rlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f;
ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf);
}
return &ah->ibah;
}
struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
struct ib_udata *udata)
{
struct mlx5_ib_ah *ah;
struct mlx5_ib_dev *dev = to_mdev(pd->device);
enum rdma_ah_attr_type ah_type = ah_attr->type;
if ((ah_type == RDMA_AH_ATTR_TYPE_ROCE) &&
!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
return ERR_PTR(-EINVAL);
if (ah_type == RDMA_AH_ATTR_TYPE_ROCE && udata) {
int err;
struct mlx5_ib_create_ah_resp resp = {};
u32 min_resp_len = offsetof(typeof(resp), dmac) +
sizeof(resp.dmac);
if (udata->outlen < min_resp_len)
return ERR_PTR(-EINVAL);
resp.response_length = min_resp_len;
memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
err = ib_copy_to_udata(udata, &resp, resp.response_length);
if (err)
return ERR_PTR(err);
}
ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
if (!ah)
return ERR_PTR(-ENOMEM);
return create_ib_ah(dev, ah, ah_attr); /* never fails */
}
int mlx5_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
{
struct mlx5_ib_ah *ah = to_mah(ibah);
u32 tmp;
memset(ah_attr, 0, sizeof(*ah_attr));
ah_attr->type = ibah->type;
tmp = be32_to_cpu(ah->av.grh_gid_fl);
if (tmp & (1 << 30)) {
rdma_ah_set_grh(ah_attr, NULL,
tmp & 0xfffff,
(tmp >> 20) & 0xff,
ah->av.hop_limit,
ah->av.tclass);
rdma_ah_set_dgid_raw(ah_attr, ah->av.rgid);
}
rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.rlid));
rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate_sl >> 4);
rdma_ah_set_sl(ah_attr, ah->av.stat_rate_sl & 0xf);
return 0;
}
int mlx5_ib_destroy_ah(struct ib_ah *ah)
{
kfree(to_mah(ah));
return 0;
}
|
