2 * Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
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5 * modification, are permitted provided that the following conditions
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30 static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev,
31 struct mlx5_ib_ah *ah,
32 struct ib_ah_attr *ah_attr,
33 enum rdma_link_layer ll)
35 if (ah_attr->ah_flags & IB_AH_GRH) {
36 memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16);
37 ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label |
39 ah_attr->grh.sgid_index << 20);
40 ah->av.hop_limit = ah_attr->grh.hop_limit;
41 ah->av.tclass = ah_attr->grh.traffic_class;
44 ah->av.stat_rate_sl = (ah_attr->static_rate << 4);
46 if (ll == IB_LINK_LAYER_ETHERNET) {
47 memcpy(ah->av.rmac, ah_attr->dmac, sizeof(ah_attr->dmac));
49 mlx5_get_roce_udp_sport(dev,
51 ah_attr->grh.sgid_index);
52 ah->av.stat_rate_sl |= (ah_attr->sl & 0x7) << 1;
54 ah->av.rlid = cpu_to_be16(ah_attr->dlid);
55 ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f;
56 ah->av.stat_rate_sl |= (ah_attr->sl & 0xf);
62 struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
63 struct ib_udata *udata)
66 struct mlx5_ib_ah *ah;
67 struct mlx5_ib_dev *dev = to_mdev(pd->device);
68 enum rdma_link_layer ll;
70 ll = pd->device->get_link_layer(pd->device, ah_attr->port_num);
72 if (ll == IB_LINK_LAYER_ETHERNET && !(ah_attr->ah_flags & IB_AH_GRH))
73 return ERR_PTR(-EINVAL);
75 if (ll == IB_LINK_LAYER_ETHERNET && udata) {
77 struct mlx5_ib_create_ah_resp resp = {};
78 u32 min_resp_len = offsetof(typeof(resp), dmac) +
81 if (udata->outlen < min_resp_len)
82 return ERR_PTR(-EINVAL);
84 resp.response_length = min_resp_len;
86 err = ib_resolve_eth_dmac(pd->device, ah_attr);
90 memcpy(resp.dmac, ah_attr->dmac, ETH_ALEN);
91 err = ib_copy_to_udata(udata, &resp, resp.response_length);
96 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
98 return ERR_PTR(-ENOMEM);
100 return create_ib_ah(dev, ah, ah_attr, ll); /* never fails */
103 int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
105 struct mlx5_ib_ah *ah = to_mah(ibah);
108 memset(ah_attr, 0, sizeof(*ah_attr));
110 tmp = be32_to_cpu(ah->av.grh_gid_fl);
111 if (tmp & (1 << 30)) {
112 ah_attr->ah_flags = IB_AH_GRH;
113 ah_attr->grh.sgid_index = (tmp >> 20) & 0xff;
114 ah_attr->grh.flow_label = tmp & 0xfffff;
115 memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16);
116 ah_attr->grh.hop_limit = ah->av.hop_limit;
117 ah_attr->grh.traffic_class = ah->av.tclass;
119 ah_attr->dlid = be16_to_cpu(ah->av.rlid);
120 ah_attr->static_rate = ah->av.stat_rate_sl >> 4;
121 ah_attr->sl = ah->av.stat_rate_sl & 0xf;
126 int mlx5_ib_destroy_ah(struct ib_ah *ah)