2 * Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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9 * 2. Redistributions in binary form must reproduce the above copyright
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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)
64 struct mlx5_ib_ah *ah;
65 struct mlx5_ib_dev *dev = to_mdev(pd->device);
66 enum rdma_link_layer ll;
68 ll = pd->device->get_link_layer(pd->device, ah_attr->port_num);
70 if (ll == IB_LINK_LAYER_ETHERNET && !(ah_attr->ah_flags & IB_AH_GRH))
71 return ERR_PTR(-EINVAL);
73 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
75 return ERR_PTR(-ENOMEM);
77 return create_ib_ah(dev, ah, ah_attr, ll); /* never fails */
80 int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
82 struct mlx5_ib_ah *ah = to_mah(ibah);
85 memset(ah_attr, 0, sizeof(*ah_attr));
87 tmp = be32_to_cpu(ah->av.grh_gid_fl);
88 if (tmp & (1 << 30)) {
89 ah_attr->ah_flags = IB_AH_GRH;
90 ah_attr->grh.sgid_index = (tmp >> 20) & 0xff;
91 ah_attr->grh.flow_label = tmp & 0xfffff;
92 memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16);
93 ah_attr->grh.hop_limit = ah->av.hop_limit;
94 ah_attr->grh.traffic_class = ah->av.tclass;
96 ah_attr->dlid = be16_to_cpu(ah->av.rlid);
97 ah_attr->static_rate = ah->av.stat_rate_sl >> 4;
98 ah_attr->sl = ah->av.stat_rate_sl & 0xf;
103 int mlx5_ib_destroy_ah(struct ib_ah *ah)