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 = 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
hns_roce_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)52 int 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(ah_attr);
57 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
58 struct hns_roce_ah *ah = to_hr_ah(ibah);
59 int ret = 0;
60
61 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata)
62 return -EOPNOTSUPP;
63
64 ah->av.port = rdma_ah_get_port_num(ah_attr);
65 ah->av.gid_index = grh->sgid_index;
66
67 if (rdma_ah_get_static_rate(ah_attr))
68 ah->av.stat_rate = IB_RATE_10_GBPS;
69
70 ah->av.hop_limit = grh->hop_limit;
71 ah->av.flowlabel = grh->flow_label;
72 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
73 ah->av.sl = rdma_ah_get_sl(ah_attr);
74 ah->av.tclass = get_tclass(grh);
75
76 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
77 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
78
79 /* HIP08 needs to record vlan info in Address Vector */
80 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
81 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
82 &ah->av.vlan_id, NULL);
83 if (ret)
84 return ret;
85
86 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
87 }
88
89 return ret;
90 }
91
hns_roce_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)92 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
93 {
94 struct hns_roce_ah *ah = to_hr_ah(ibah);
95
96 memset(ah_attr, 0, sizeof(*ah_attr));
97
98 rdma_ah_set_sl(ah_attr, ah->av.sl);
99 rdma_ah_set_port_num(ah_attr, ah->av.port);
100 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
101 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
102 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
103 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
104
105 return 0;
106 }
107
