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
get_ah_udp_sport(const struct rdma_ah_attr * ah_attr)38 static 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 = prandom_u32_max(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
45 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
46 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
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_ah *ah = to_hr_ah(ibah);
60 int ret = 0;
61
62 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata)
63 return -EOPNOTSUPP;
64
65 ah->av.port = rdma_ah_get_port_num(ah_attr);
66 ah->av.gid_index = grh->sgid_index;
67
68 if (rdma_ah_get_static_rate(ah_attr))
69 ah->av.stat_rate = IB_RATE_10_GBPS;
70
71 ah->av.hop_limit = grh->hop_limit;
72 ah->av.flowlabel = grh->flow_label;
73 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
74 ah->av.sl = rdma_ah_get_sl(ah_attr);
75 ah->av.tclass = get_tclass(grh);
76
77 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
78 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
79
80 /* HIP08 needs to record vlan info in Address Vector */
81 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
82 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
83 &ah->av.vlan_id, NULL);
84 if (ret)
85 return ret;
86
87 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
88 }
89
90 return ret;
91 }
92
hns_roce_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)93 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
94 {
95 struct hns_roce_ah *ah = to_hr_ah(ibah);
96
97 memset(ah_attr, 0, sizeof(*ah_attr));
98
99 rdma_ah_set_sl(ah_attr, ah->av.sl);
100 rdma_ah_set_port_num(ah_attr, ah->av.port);
101 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
102 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
103 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
104 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
105
106 return 0;
107 }
108
