1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33#include <linux/platform_device.h>
34#include <linux/pci.h>
35#include <rdma/ib_addr.h>
36#include <rdma/ib_cache.h>
37#include "hns_roce_device.h"
38
39static 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() %
46 (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
55int 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
64 if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08 && udata)
65 return -EOPNOTSUPP;
66
67 ah->av.port = rdma_ah_get_port_num(ah_attr);
68 ah->av.gid_index = grh->sgid_index;
69
70 if (rdma_ah_get_static_rate(ah_attr))
71 ah->av.stat_rate = IB_RATE_10_GBPS;
72
73 ah->av.hop_limit = grh->hop_limit;
74 ah->av.flowlabel = grh->flow_label;
75 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
76 ah->av.sl = rdma_ah_get_sl(ah_attr);
77 ah->av.tclass = get_tclass(grh);
78
79 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
80 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
81
82
83 if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08) {
84 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
85 &ah->av.vlan_id, NULL);
86 if (ret)
87 return ret;
88
89 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
90 }
91
92 return ret;
93}
94
95int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
96{
97 struct hns_roce_ah *ah = to_hr_ah(ibah);
98
99 memset(ah_attr, 0, sizeof(*ah_attr));
100
101 rdma_ah_set_sl(ah_attr, ah->av.sl);
102 rdma_ah_set_port_num(ah_attr, ah->av.port);
103 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
104 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
105 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
106 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
107
108 return 0;
109}
110