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 "hnae3.h"
37 #include "hns_roce_device.h"
38 #include "hns_roce_hw_v2.h"
39
get_ah_udp_sport(const struct rdma_ah_attr * ah_attr)40 static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
41 {
42 u32 fl = ah_attr->grh.flow_label;
43 u16 sport;
44
45 if (!fl)
46 sport = prandom_u32_max(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
47 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
48 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
49 else
50 sport = rdma_flow_label_to_udp_sport(fl);
51
52 return sport;
53 }
54
hns_roce_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)55 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
56 struct ib_udata *udata)
57 {
58 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
59 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
60 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
61 struct hns_roce_ah *ah = to_hr_ah(ibah);
62 int ret = 0;
63 u32 max_sl;
64
65 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata)
66 return -EOPNOTSUPP;
67
68 ah->av.port = rdma_ah_get_port_num(ah_attr);
69 ah->av.gid_index = grh->sgid_index;
70
71 if (rdma_ah_get_static_rate(ah_attr))
72 ah->av.stat_rate = IB_RATE_10_GBPS;
73
74 ah->av.hop_limit = grh->hop_limit;
75 ah->av.flowlabel = grh->flow_label;
76 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
77 ah->av.tclass = get_tclass(grh);
78
79 ah->av.sl = rdma_ah_get_sl(ah_attr);
80 max_sl = min_t(u32, MAX_SERVICE_LEVEL, hr_dev->caps.sl_num - 1);
81 if (unlikely(ah->av.sl > max_sl)) {
82 ibdev_err_ratelimited(&hr_dev->ib_dev,
83 "failed to set sl, sl (%u) shouldn't be larger than %u.\n",
84 ah->av.sl, max_sl);
85 return -EINVAL;
86 }
87
88 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
89 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
90
91 /* HIP08 needs to record vlan info in Address Vector */
92 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
93 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
94 &ah->av.vlan_id, NULL);
95 if (ret)
96 return ret;
97
98 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
99 }
100
101 return ret;
102 }
103
hns_roce_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)104 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
105 {
106 struct hns_roce_ah *ah = to_hr_ah(ibah);
107
108 memset(ah_attr, 0, sizeof(*ah_attr));
109
110 rdma_ah_set_sl(ah_attr, ah->av.sl);
111 rdma_ah_set_port_num(ah_attr, ah->av.port);
112 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
113 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
114 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
115 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
116
117 return 0;
118 }
119