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1/*2 * Copyright (c) 2007 Cisco Systems, Inc. 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 <rdma/ib_addr.h>34#include <rdma/ib_cache.h>35 36#include <linux/slab.h>37#include <linux/inet.h>38#include <linux/string.h>39#include <linux/mlx4/driver.h>40 41#include "mlx4_ib.h"42 43static void create_ib_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)44{45 struct mlx4_ib_ah *ah = to_mah(ib_ah);46 struct mlx4_dev *dev = to_mdev(ib_ah->device)->dev;47 48 ah->av.ib.port_pd = cpu_to_be32(to_mpd(ib_ah->pd)->pdn |49 (rdma_ah_get_port_num(ah_attr) << 24));50 ah->av.ib.g_slid = rdma_ah_get_path_bits(ah_attr);51 ah->av.ib.sl_tclass_flowlabel =52 cpu_to_be32(rdma_ah_get_sl(ah_attr) << 28);53 if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {54 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);55 56 ah->av.ib.g_slid |= 0x80;57 ah->av.ib.gid_index = grh->sgid_index;58 ah->av.ib.hop_limit = grh->hop_limit;59 ah->av.ib.sl_tclass_flowlabel |=60 cpu_to_be32((grh->traffic_class << 20) |61 grh->flow_label);62 memcpy(ah->av.ib.dgid, grh->dgid.raw, 16);63 }64 65 ah->av.ib.dlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));66 if (rdma_ah_get_static_rate(ah_attr)) {67 u8 static_rate = rdma_ah_get_static_rate(ah_attr) +68 MLX4_STAT_RATE_OFFSET;69 70 while (static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&71 !(1 << static_rate & dev->caps.stat_rate_support))72 --static_rate;73 ah->av.ib.stat_rate = static_rate;74 }75}76 77static int create_iboe_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)78{79 struct mlx4_ib_dev *ibdev = to_mdev(ib_ah->device);80 struct mlx4_ib_ah *ah = to_mah(ib_ah);81 const struct ib_gid_attr *gid_attr;82 struct mlx4_dev *dev = ibdev->dev;83 int is_mcast = 0;84 struct in6_addr in6;85 u16 vlan_tag = 0xffff;86 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);87 int ret;88 89 memcpy(&in6, grh->dgid.raw, sizeof(in6));90 if (rdma_is_multicast_addr(&in6))91 is_mcast = 1;92 93 memcpy(ah->av.eth.mac, ah_attr->roce.dmac, ETH_ALEN);94 eth_zero_addr(ah->av.eth.s_mac);95 96 /*97 * If sgid_attr is NULL we are being called by mlx4_ib_create_ah_slave98 * and we are directly creating an AV for a slave's gid_index.99 */100 gid_attr = ah_attr->grh.sgid_attr;101 if (gid_attr) {102 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_tag,103 &ah->av.eth.s_mac[0]);104 if (ret)105 return ret;106 107 ret = mlx4_ib_gid_index_to_real_index(ibdev, gid_attr);108 if (ret < 0)109 return ret;110 ah->av.eth.gid_index = ret;111 } else {112 /* mlx4_ib_create_ah_slave fills in the s_mac and the vlan */113 ah->av.eth.gid_index = ah_attr->grh.sgid_index;114 }115 116 if (vlan_tag < 0x1000)117 vlan_tag |= (rdma_ah_get_sl(ah_attr) & 7) << 13;118 ah->av.eth.port_pd = cpu_to_be32(to_mpd(ib_ah->pd)->pdn |119 (rdma_ah_get_port_num(ah_attr) << 24));120 ah->av.eth.vlan = cpu_to_be16(vlan_tag);121 ah->av.eth.hop_limit = grh->hop_limit;122 if (rdma_ah_get_static_rate(ah_attr)) {123 ah->av.eth.stat_rate = rdma_ah_get_static_rate(ah_attr) +124 MLX4_STAT_RATE_OFFSET;125 while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&126 !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))127 --ah->av.eth.stat_rate;128 }129 ah->av.eth.sl_tclass_flowlabel |=130 cpu_to_be32((grh->traffic_class << 20) |131 grh->flow_label);132 /*133 * HW requires multicast LID so we just choose one.134 */135 if (is_mcast)136 ah->av.ib.dlid = cpu_to_be16(0xc000);137 138 memcpy(ah->av.eth.dgid, grh->dgid.raw, 16);139 ah->av.eth.sl_tclass_flowlabel |= cpu_to_be32(rdma_ah_get_sl(ah_attr)140 << 29);141 return 0;142}143 144int mlx4_ib_create_ah(struct ib_ah *ib_ah, struct rdma_ah_init_attr *init_attr,145 struct ib_udata *udata)146{147 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;148 149 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {150 if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))151 return -EINVAL;152 /*153 * TBD: need to handle the case when we get154 * called in an atomic context and there we155 * might sleep. We don't expect this156 * currently since we're working with link157 * local addresses which we can translate158 * without going to sleep.159 */160 return create_iboe_ah(ib_ah, ah_attr);161 }162 163 create_ib_ah(ib_ah, ah_attr);164 return 0;165}166 167int mlx4_ib_create_ah_slave(struct ib_ah *ah, struct rdma_ah_attr *ah_attr,168 int slave_sgid_index, u8 *s_mac, u16 vlan_tag)169{170 struct rdma_ah_attr slave_attr = *ah_attr;171 struct rdma_ah_init_attr init_attr = {};172 struct mlx4_ib_ah *mah = to_mah(ah);173 int ret;174 175 slave_attr.grh.sgid_attr = NULL;176 slave_attr.grh.sgid_index = slave_sgid_index;177 init_attr.ah_attr = &slave_attr;178 ret = mlx4_ib_create_ah(ah, &init_attr, NULL);179 if (ret)180 return ret;181 182 ah->type = ah_attr->type;183 184 /* get rid of force-loopback bit */185 mah->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);186 187 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE)188 memcpy(mah->av.eth.s_mac, s_mac, 6);189 190 if (vlan_tag < 0x1000)191 vlan_tag |= (rdma_ah_get_sl(ah_attr) & 7) << 13;192 mah->av.eth.vlan = cpu_to_be16(vlan_tag);193 194 return 0;195}196 197int mlx4_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)198{199 struct mlx4_ib_ah *ah = to_mah(ibah);200 int port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;201 202 memset(ah_attr, 0, sizeof *ah_attr);203 ah_attr->type = ibah->type;204 205 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {206 rdma_ah_set_dlid(ah_attr, 0);207 rdma_ah_set_sl(ah_attr,208 be32_to_cpu(ah->av.eth.sl_tclass_flowlabel)209 >> 29);210 } else {211 rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.ib.dlid));212 rdma_ah_set_sl(ah_attr,213 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel)214 >> 28);215 }216 217 rdma_ah_set_port_num(ah_attr, port_num);218 if (ah->av.ib.stat_rate)219 rdma_ah_set_static_rate(ah_attr,220 ah->av.ib.stat_rate -221 MLX4_STAT_RATE_OFFSET);222 rdma_ah_set_path_bits(ah_attr, ah->av.ib.g_slid & 0x7F);223 if (mlx4_ib_ah_grh_present(ah)) {224 u32 tc_fl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel);225 226 rdma_ah_set_grh(ah_attr, NULL,227 tc_fl & 0xfffff, ah->av.ib.gid_index,228 ah->av.ib.hop_limit,229 tc_fl >> 20);230 rdma_ah_set_dgid_raw(ah_attr, ah->av.ib.dgid);231 }232 233 return 0;234}235