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 <linux/pci.h>
34 #include <rdma/ib_addr.h>
35 #include <rdma/ib_cache.h>
36 #include "hns_roce_device.h"
37 #include "hns_roce_hw_v2.h"
38
get_ah_udp_sport(const struct rdma_ah_attr * ah_attr)39 static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
40 {
41 u32 fl = ah_attr->grh.flow_label;
42 u16 sport;
43
44 if (!fl)
45 sport = get_random_u32_inclusive(IB_ROCE_UDP_ENCAP_VALID_PORT_MIN,
46 IB_ROCE_UDP_ENCAP_VALID_PORT_MAX);
47 else
48 sport = rdma_flow_label_to_udp_sport(fl);
49
50 return sport;
51 }
52
hns_roce_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)53 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
54 struct ib_udata *udata)
55 {
56 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
57 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
58 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
59 struct hns_roce_ib_create_ah_resp resp = {};
60 struct hns_roce_ah *ah = to_hr_ah(ibah);
61 u8 tclass = get_tclass(grh);
62 u8 priority = 0;
63 u8 tc_mode = 0;
64 int ret;
65
66 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata) {
67 ret = -EOPNOTSUPP;
68 goto err_out;
69 }
70
71 ah->av.port = rdma_ah_get_port_num(ah_attr);
72 ah->av.gid_index = grh->sgid_index;
73
74 if (rdma_ah_get_static_rate(ah_attr))
75 ah->av.stat_rate = IB_RATE_10_GBPS;
76
77 ah->av.hop_limit = grh->hop_limit;
78 ah->av.flowlabel = grh->flow_label;
79 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
80 ah->av.tclass = tclass;
81
82 ret = hr_dev->hw->get_dscp(hr_dev, tclass, &tc_mode, &priority);
83 if (ret == -EOPNOTSUPP)
84 ret = 0;
85
86 if (ret && grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
87 goto err_out;
88
89 if (tc_mode == HNAE3_TC_MAP_MODE_DSCP &&
90 grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
91 ah->av.sl = priority;
92 else
93 ah->av.sl = rdma_ah_get_sl(ah_attr);
94
95 if (!check_sl_valid(hr_dev, ah->av.sl)) {
96 ret = -EINVAL;
97 goto err_out;
98 }
99
100 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
101 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
102
103 /* HIP08 needs to record vlan info in Address Vector */
104 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
105 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
106 &ah->av.vlan_id, NULL);
107 if (ret)
108 goto err_out;
109
110 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
111 }
112
113 if (udata) {
114 resp.priority = ah->av.sl;
115 resp.tc_mode = tc_mode;
116 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
117 ret = ib_copy_to_udata(udata, &resp,
118 min(udata->outlen, sizeof(resp)));
119 }
120
121 err_out:
122 if (ret)
123 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]);
124
125 return ret;
126 }
127
hns_roce_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)128 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
129 {
130 struct hns_roce_ah *ah = to_hr_ah(ibah);
131
132 memset(ah_attr, 0, sizeof(*ah_attr));
133
134 rdma_ah_set_sl(ah_attr, ah->av.sl);
135 rdma_ah_set_port_num(ah_attr, ah->av.port);
136 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
137 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
138 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
139 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
140
141 return 0;
142 }
143