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1/*2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#include "mlx5_ib.h"34 35static __be16 mlx5_ah_get_udp_sport(const struct mlx5_ib_dev *dev,36 const struct rdma_ah_attr *ah_attr)37{38 enum ib_gid_type gid_type = ah_attr->grh.sgid_attr->gid_type;39 __be16 sport;40 41 if ((gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) &&42 (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) &&43 (ah_attr->grh.flow_label & IB_GRH_FLOWLABEL_MASK))44 sport = cpu_to_be16(45 rdma_flow_label_to_udp_sport(ah_attr->grh.flow_label));46 else47 sport = mlx5_get_roce_udp_sport_min(dev,48 ah_attr->grh.sgid_attr);49 50 return sport;51}52 53static void create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah,54 struct rdma_ah_init_attr *init_attr)55{56 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;57 enum ib_gid_type gid_type;58 59 if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {60 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);61 62 memcpy(ah->av.rgid, &grh->dgid, 16);63 ah->av.grh_gid_fl = cpu_to_be32(grh->flow_label |64 (1 << 30) |65 grh->sgid_index << 20);66 ah->av.hop_limit = grh->hop_limit;67 ah->av.tclass = grh->traffic_class;68 }69 70 ah->av.stat_rate_sl = (rdma_ah_get_static_rate(ah_attr) << 4);71 72 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {73 if (init_attr->xmit_slave)74 ah->xmit_port =75 mlx5_lag_get_slave_port(dev->mdev,76 init_attr->xmit_slave);77 gid_type = ah_attr->grh.sgid_attr->gid_type;78 79 memcpy(ah->av.rmac, ah_attr->roce.dmac,80 sizeof(ah_attr->roce.dmac));81 ah->av.udp_sport = mlx5_ah_get_udp_sport(dev, ah_attr);82 ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0x7) << 1;83 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)84#define MLX5_ECN_ENABLED BIT(1)85 ah->av.tclass |= MLX5_ECN_ENABLED;86 } else {87 ah->av.rlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));88 ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f;89 ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf);90 }91}92 93int mlx5_ib_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,94 struct ib_udata *udata)95 96{97 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;98 struct mlx5_ib_ah *ah = to_mah(ibah);99 struct mlx5_ib_dev *dev = to_mdev(ibah->device);100 enum rdma_ah_attr_type ah_type = ah_attr->type;101 102 if ((ah_type == RDMA_AH_ATTR_TYPE_ROCE) &&103 !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))104 return -EINVAL;105 106 if (ah_type == RDMA_AH_ATTR_TYPE_ROCE && udata) {107 int err;108 struct mlx5_ib_create_ah_resp resp = {};109 u32 min_resp_len =110 offsetofend(struct mlx5_ib_create_ah_resp, dmac);111 112 if (udata->outlen < min_resp_len)113 return -EINVAL;114 115 resp.response_length = min_resp_len;116 117 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);118 err = ib_copy_to_udata(udata, &resp, resp.response_length);119 if (err)120 return err;121 }122 123 create_ib_ah(dev, ah, init_attr);124 return 0;125}126 127int mlx5_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)128{129 struct mlx5_ib_ah *ah = to_mah(ibah);130 u32 tmp;131 132 memset(ah_attr, 0, sizeof(*ah_attr));133 ah_attr->type = ibah->type;134 135 tmp = be32_to_cpu(ah->av.grh_gid_fl);136 if (tmp & (1 << 30)) {137 rdma_ah_set_grh(ah_attr, NULL,138 tmp & 0xfffff,139 (tmp >> 20) & 0xff,140 ah->av.hop_limit,141 ah->av.tclass);142 rdma_ah_set_dgid_raw(ah_attr, ah->av.rgid);143 }144 rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.rlid));145 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate_sl >> 4);146 rdma_ah_set_sl(ah_attr, ah->av.stat_rate_sl & 0xf);147 148 return 0;149}150