mlx4_ib_ah.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    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 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 <sys/types.h>
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <rdma/ib_addr.h>
   37 #include <rdma/ib_cache.h>
   38 
   39 #include <linux/slab.h>
   40 #include <linux/string.h>
   41 #include <linux/etherdevice.h>
   42 
   43 #include "mlx4_ib.h"
   44 
   45 static int create_ib_ah(struct ib_ah *ib_ah, struct ib_ah_attr *ah_attr)
   46 {
   47         struct ib_pd *pd = ib_ah->pd;
   48         struct mlx4_ib_ah *ah = to_mah(ib_ah);
   49         struct mlx4_dev *dev = to_mdev(ib_ah->device)->dev;
   50 
   51         ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
   52         ah->av.ib.g_slid  = ah_attr->src_path_bits;
   53         ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
   54         if (ah_attr->ah_flags & IB_AH_GRH) {
   55                 ah->av.ib.g_slid   |= 0x80;
   56                 ah->av.ib.gid_index = ah_attr->grh.sgid_index;
   57                 ah->av.ib.hop_limit = ah_attr->grh.hop_limit;
   58                 ah->av.ib.sl_tclass_flowlabel |=
   59                         cpu_to_be32((ah_attr->grh.traffic_class << 20) |
   60                                     ah_attr->grh.flow_label);
   61                 memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16);
   62         }
   63 
   64         ah->av.ib.dlid    = cpu_to_be16(ah_attr->dlid);
   65         if (ah_attr->static_rate) {
   66                 ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
   67                 while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
   68                        !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support))
   69                         --ah->av.ib.stat_rate;
   70         }
   71         return 0;
   72 }
   73 
   74 static int create_iboe_ah(struct ib_ah *ib_ah, struct ib_ah_attr *ah_attr)
   75 {
   76         struct ib_pd *pd = ib_ah->pd;
   77         struct mlx4_ib_dev *ibdev = to_mdev(ib_ah->device);
   78         struct mlx4_ib_ah *ah = to_mah(ib_ah);
   79         struct mlx4_dev *dev = ibdev->dev;
   80         int is_mcast = 0;
   81         struct in6_addr in6;
   82         u16 vlan_tag = 0xffff;
   83         union ib_gid sgid;
   84         struct ib_gid_attr gid_attr;
   85         int ret;
   86 
   87         memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(in6));
   88         if (rdma_is_multicast_addr(&in6)) {
   89                 is_mcast = 1;
   90                 rdma_get_mcast_mac(&in6, ah->av.eth.mac);
   91         } else {
   92                 memcpy(ah->av.eth.mac, ah_attr->dmac, ETH_ALEN);
   93         }
   94         ret = ib_get_cached_gid(pd->device, ah_attr->port_num,
   95                                 ah_attr->grh.sgid_index, &sgid, &gid_attr);
   96         if (ret)
   97                 return ret;
   98         eth_zero_addr(ah->av.eth.s_mac);
   99         if (gid_attr.ndev) {
  100                 vlan_tag = rdma_vlan_dev_vlan_id(gid_attr.ndev);
  101                 memcpy(ah->av.eth.s_mac, IF_LLADDR(gid_attr.ndev), ETH_ALEN);
  102                 if_rele(gid_attr.ndev);
  103         }
  104         if (vlan_tag < 0x1000)
  105                 vlan_tag |= (ah_attr->sl & 7) << 13;
  106         ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
  107         ret = mlx4_ib_gid_index_to_real_index(ibdev, ah_attr->port_num, ah_attr->grh.sgid_index);
  108         if (ret < 0)
  109                 return ret;
  110         ah->av.eth.gid_index = ret;
  111         ah->av.eth.vlan = cpu_to_be16(vlan_tag);
  112         ah->av.eth.hop_limit = ah_attr->grh.hop_limit;
  113         if (ah_attr->static_rate) {
  114                 ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
  115                 while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
  116                        !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))
  117                         --ah->av.eth.stat_rate;
  118         }
  119 
  120         /*
  121          * HW requires multicast LID so we just choose one.
  122          */
  123         if (is_mcast)
  124                 ah->av.ib.dlid = cpu_to_be16(0xc000);
  125 
  126         memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16);
  127         ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 29);
  128 
  129         return 0;
  130 }
  131 
  132 int mlx4_ib_create_ah(struct ib_ah *ib_ah, struct ib_ah_attr *ah_attr,
  133                       u32 flags, struct ib_udata *udata)
  134 {
  135         if (rdma_port_get_link_layer(ib_ah->pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) {
  136                 if (!(ah_attr->ah_flags & IB_AH_GRH)) {
  137                         return -EINVAL;
  138                 } else {
  139                         /*
  140                          * TBD: need to handle the case when we get
  141                          * called in an atomic context and there we
  142                          * might sleep.  We don't expect this
  143                          * currently since we're working with link
  144                          * local addresses which we can translate
  145                          * without going to sleep.
  146                          */
  147                         return create_iboe_ah(ib_ah, ah_attr);
  148                 }
  149         }
  150         return create_ib_ah(ib_ah, ah_attr);
  151 }
  152 
  153 int mlx4_ib_create_ah_slave(struct ib_ah *ah, struct ib_ah_attr *ah_attr,
  154                             int slave_sgid_index, u8 *s_mac, u16 vlan_tag)
  155 {
  156         struct ib_ah_attr slave_attr = *ah_attr;
  157         struct mlx4_ib_ah *mah = to_mah(ah);
  158         int ret;
  159 
  160         slave_attr.grh.sgid_index = slave_sgid_index;
  161         ret = mlx4_ib_create_ah(ah, &slave_attr, 0, NULL);
  162         if (ret)
  163                 return ret;
  164 
  165         /* get rid of force-loopback bit */
  166         mah->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);
  167 
  168         if (rdma_port_get_link_layer(ah->pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET)
  169                 memcpy(mah->av.eth.s_mac, s_mac, 6);
  170 
  171         if (vlan_tag < 0x1000)
  172                 vlan_tag |= (ah_attr->sl & 7) << 13;
  173         mah->av.eth.vlan = cpu_to_be16(vlan_tag);
  174 
  175         return 0;
  176 }
  177 
  178 int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
  179 {
  180         struct mlx4_ib_ah *ah = to_mah(ibah);
  181         enum rdma_link_layer ll;
  182 
  183         memset(ah_attr, 0, sizeof *ah_attr);
  184         ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
  185         ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num);
  186         if (ll == IB_LINK_LAYER_ETHERNET)
  187                 ah_attr->sl = be32_to_cpu(ah->av.eth.sl_tclass_flowlabel) >> 29;
  188         else
  189                 ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
  190 
  191         ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0;
  192         if (ah->av.ib.stat_rate)
  193                 ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET;
  194         ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F;
  195 
  196         if (mlx4_ib_ah_grh_present(ah)) {
  197                 ah_attr->ah_flags = IB_AH_GRH;
  198 
  199                 ah_attr->grh.traffic_class =
  200                         be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20;
  201                 ah_attr->grh.flow_label =
  202                         be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff;
  203                 ah_attr->grh.hop_limit  = ah->av.ib.hop_limit;
  204                 ah_attr->grh.sgid_index = ah->av.ib.gid_index;
  205                 memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16);
  206         }
  207 
  208         return 0;
  209 }
  210 
  211 void mlx4_ib_destroy_ah(struct ib_ah *ah, u32 flags)
  212 {
  213         return;
  214 }

Cache object: c09ec7989e1bc6bd3c971cde9c890acb

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/mlx4/mlx4_ib/mlx4_ib_ah.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx4/mlx4_ib/mlx4_ib_ah.c