1 /*- 2 * Copyright (c) 2013-2020, Mellanox Technologies, Ltd. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #include "opt_rss.h" 29 #include "opt_ratelimit.h" 30 31 #include <dev/mlx5/mlx5_ib/mlx5_ib.h> 32 33 static void create_ib_ah(struct mlx5_ib_dev *dev, 34 struct mlx5_ib_ah *ah, 35 struct ib_ah_attr *ah_attr, 36 enum rdma_link_layer ll) 37 { 38 if (ah_attr->ah_flags & IB_AH_GRH) { 39 memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16); 40 ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label | 41 (1 << 30) | 42 ah_attr->grh.sgid_index << 20); 43 ah->av.hop_limit = ah_attr->grh.hop_limit; 44 ah->av.tclass = ah_attr->grh.traffic_class; 45 } 46 47 ah->av.stat_rate_sl = (ah_attr->static_rate << 4); 48 49 if (ll == IB_LINK_LAYER_ETHERNET) { 50 memcpy(ah->av.rmac, ah_attr->dmac, sizeof(ah_attr->dmac)); 51 ah->av.udp_sport = 52 mlx5_get_roce_udp_sport(dev, 53 ah_attr->port_num, 54 ah_attr->grh.sgid_index); 55 ah->av.stat_rate_sl |= (ah_attr->sl & 0x7) << 1; 56 } else { 57 ah->av.rlid = cpu_to_be16(ah_attr->dlid); 58 ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f; 59 ah->av.stat_rate_sl |= (ah_attr->sl & 0xf); 60 } 61 } 62 63 int mlx5_ib_create_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr, 64 u32 flags, struct ib_udata *udata) 65 66 { 67 struct mlx5_ib_ah *ah = to_mah(ibah); 68 struct mlx5_ib_dev *dev = to_mdev(ibah->device); 69 enum rdma_link_layer ll; 70 71 ll = dev->ib_dev.get_link_layer(&dev->ib_dev, ah_attr->port_num); 72 73 if (ll == IB_LINK_LAYER_ETHERNET && !(ah_attr->ah_flags & IB_AH_GRH)) 74 return -EINVAL; 75 76 if (ll == IB_LINK_LAYER_ETHERNET && udata) { 77 int err; 78 struct mlx5_ib_create_ah_resp resp = {}; 79 u32 min_resp_len = offsetof(typeof(resp), dmac) + 80 sizeof(resp.dmac); 81 82 if (udata->outlen < min_resp_len) 83 return -EINVAL; 84 85 resp.response_length = min_resp_len; 86 87 err = ib_resolve_eth_dmac(&dev->ib_dev, ah_attr); 88 if (err) 89 return err; 90 91 memcpy(resp.dmac, ah_attr->dmac, ETH_ALEN); 92 err = ib_copy_to_udata(udata, &resp, resp.response_length); 93 if (err) 94 return err; 95 } 96 97 create_ib_ah(dev, ah, ah_attr, ll); 98 return 0; 99 } 100 101 int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) 102 { 103 struct mlx5_ib_ah *ah = to_mah(ibah); 104 u32 tmp; 105 106 memset(ah_attr, 0, sizeof(*ah_attr)); 107 108 tmp = be32_to_cpu(ah->av.grh_gid_fl); 109 if (tmp & (1 << 30)) { 110 ah_attr->ah_flags = IB_AH_GRH; 111 ah_attr->grh.sgid_index = (tmp >> 20) & 0xff; 112 ah_attr->grh.flow_label = tmp & 0xfffff; 113 memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16); 114 ah_attr->grh.hop_limit = ah->av.hop_limit; 115 ah_attr->grh.traffic_class = ah->av.tclass; 116 } 117 ah_attr->dlid = be16_to_cpu(ah->av.rlid); 118 ah_attr->static_rate = ah->av.stat_rate_sl >> 4; 119 ah_attr->sl = ah->av.stat_rate_sl & 0xf; 120 121 return 0; 122 } 123 124 void mlx5_ib_destroy_ah(struct ib_ah *ah, u32 flags) 125 { 126 return; 127 } 128