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33#include <linux/platform_device.h>
34#include <rdma/ib_addr.h>
35#include <rdma/ib_cache.h>
36#include "hns_roce_device.h"
37
38#define HNS_ROCE_PORT_NUM_SHIFT 24
39#define HNS_ROCE_VLAN_SL_BIT_MASK 7
40#define HNS_ROCE_VLAN_SL_SHIFT 13
41
42struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd,
43 struct rdma_ah_attr *ah_attr,
44 struct ib_udata *udata)
45{
46 struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
47 const struct ib_gid_attr *gid_attr;
48 struct device *dev = hr_dev->dev;
49 struct hns_roce_ah *ah;
50 u16 vlan_tag = 0xffff;
51 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
52
53 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
54 if (!ah)
55 return ERR_PTR(-ENOMEM);
56
57
58 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
59
60 gid_attr = ah_attr->grh.sgid_attr;
61 if (is_vlan_dev(gid_attr->ndev))
62 vlan_tag = vlan_dev_vlan_id(gid_attr->ndev);
63
64 if (vlan_tag < 0x1000)
65 vlan_tag |= (rdma_ah_get_sl(ah_attr) &
66 HNS_ROCE_VLAN_SL_BIT_MASK) <<
67 HNS_ROCE_VLAN_SL_SHIFT;
68
69 ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn |
70 (rdma_ah_get_port_num(ah_attr) <<
71 HNS_ROCE_PORT_NUM_SHIFT));
72 ah->av.gid_index = grh->sgid_index;
73 ah->av.vlan = cpu_to_le16(vlan_tag);
74 dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
75 ah->av.vlan);
76
77 if (rdma_ah_get_static_rate(ah_attr))
78 ah->av.stat_rate = IB_RATE_10_GBPS;
79
80 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
81 ah->av.sl_tclass_flowlabel = cpu_to_le32(rdma_ah_get_sl(ah_attr) <<
82 HNS_ROCE_SL_SHIFT);
83
84 return &ah->ibah;
85}
86
87int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
88{
89 struct hns_roce_ah *ah = to_hr_ah(ibah);
90
91 memset(ah_attr, 0, sizeof(*ah_attr));
92
93 rdma_ah_set_sl(ah_attr, (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
94 HNS_ROCE_SL_SHIFT));
95 rdma_ah_set_port_num(ah_attr, (le32_to_cpu(ah->av.port_pd) >>
96 HNS_ROCE_PORT_NUM_SHIFT));
97 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
98 rdma_ah_set_grh(ah_attr, NULL,
99 (le32_to_cpu(ah->av.sl_tclass_flowlabel) &
100 HNS_ROCE_FLOW_LABEL_MASK), ah->av.gid_index,
101 ah->av.hop_limit,
102 (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
103 HNS_ROCE_TCLASS_SHIFT));
104 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
105
106 return 0;
107}
108
109int hns_roce_destroy_ah(struct ib_ah *ah)
110{
111 kfree(to_hr_ah(ah));
112
113 return 0;
114}
115