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 two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * 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 OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include "mlx5_ib.h" 34 35 static __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 else 47 sport = mlx5_get_roce_udp_sport_min(dev, 48 ah_attr->grh.sgid_attr); 49 50 return sport; 51 } 52 53 static 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 93 int 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 } 126 127 int 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