1/*
2 * Copyright (c) 2016 Hisilicon Limited.
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 <rdma/ib_addr.h>
34#include <rdma/ib_cache.h>
35#include "hns_roce_device.h"
36#include "hns_roce_hw_v2.h"
37
38static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
39{
40 u32 fl = ah_attr->grh.flow_label;
41 u16 sport;
42
43 if (!fl)
44 sport = get_random_u32_inclusive(IB_ROCE_UDP_ENCAP_VALID_PORT_MIN,
45 IB_ROCE_UDP_ENCAP_VALID_PORT_MAX);
46 else
47 sport = rdma_flow_label_to_udp_sport(fl);
48
49 return sport;
50}
51
52int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
53 struct ib_udata *udata)
54{
55 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
56 const struct ib_global_route *grh = rdma_ah_read_grh(attr: ah_attr);
57 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev: ibah->device);
58 struct hns_roce_ib_create_ah_resp resp = {};
59 struct hns_roce_ah *ah = to_hr_ah(ibah);
60 u8 tclass = get_tclass(grh);
61 u8 priority = 0;
62 u8 tc_mode = 0;
63 int ret;
64
65 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata) {
66 ret = -EOPNOTSUPP;
67 goto err_out;
68 }
69
70 ah->av.port = rdma_ah_get_port_num(attr: ah_attr);
71 ah->av.gid_index = grh->sgid_index;
72
73 if (rdma_ah_get_static_rate(attr: ah_attr))
74 ah->av.stat_rate = IB_RATE_10_GBPS;
75
76 ah->av.hop_limit = grh->hop_limit;
77 ah->av.flowlabel = grh->flow_label;
78 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
79 ah->av.tclass = tclass;
80
81 ret = hr_dev->hw->get_dscp(hr_dev, tclass, &tc_mode, &priority);
82 if (ret == -EOPNOTSUPP)
83 ret = 0;
84
85 if (ret && grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
86 goto err_out;
87
88 if (tc_mode == HNAE3_TC_MAP_MODE_DSCP &&
89 grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
90 ah->av.sl = priority;
91 else
92 ah->av.sl = rdma_ah_get_sl(attr: ah_attr);
93
94 if (!check_sl_valid(hr_dev, sl: ah->av.sl)) {
95 ret = -EINVAL;
96 goto err_out;
97 }
98
99 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
100 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
101
102 /* HIP08 needs to record vlan info in Address Vector */
103 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
104 ret = rdma_read_gid_l2_fields(attr: ah_attr->grh.sgid_attr,
105 vlan_id: &ah->av.vlan_id, NULL);
106 if (ret)
107 goto err_out;
108
109 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
110 }
111
112 if (udata) {
113 resp.priority = ah->av.sl;
114 resp.tc_mode = tc_mode;
115 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
116 ret = ib_copy_to_udata(udata, src: &resp,
117 min(udata->outlen, sizeof(resp)));
118 }
119
120err_out:
121 if (ret)
122 atomic64_inc(v: &hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]);
123
124 return ret;
125}
126
127int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
128{
129 struct hns_roce_ah *ah = to_hr_ah(ibah);
130
131 memset(ah_attr, 0, sizeof(*ah_attr));
132
133 rdma_ah_set_sl(attr: ah_attr, sl: ah->av.sl);
134 rdma_ah_set_port_num(attr: ah_attr, port_num: ah->av.port);
135 rdma_ah_set_static_rate(attr: ah_attr, static_rate: ah->av.stat_rate);
136 rdma_ah_set_grh(attr: ah_attr, NULL, flow_label: ah->av.flowlabel,
137 sgid_index: ah->av.gid_index, hop_limit: ah->av.hop_limit, traffic_class: ah->av.tclass);
138 rdma_ah_set_dgid_raw(attr: ah_attr, dgid: ah->av.dgid);
139
140 return 0;
141}
142

source code of linux/drivers/infiniband/hw/hns/hns_roce_ah.c