mlx5_ib_ah.c

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    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 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/mlx5/mlx5_ib/mlx5_ib_ah.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx5/mlx5_ib/mlx5_ib_ah.c