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126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/*-
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* Copyright (c) 2013-2020, Mellanox Technologies, Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "opt_rss.h"
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#include "opt_ratelimit.h"
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#include <dev/mlx5/mlx5_ib/mlx5_ib.h>
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static void create_ib_ah(struct mlx5_ib_dev *dev,
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struct mlx5_ib_ah *ah,
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struct ib_ah_attr *ah_attr,
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enum rdma_link_layer ll)
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{
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if (ah_attr->ah_flags & IB_AH_GRH) {
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memcpy(ah->av.rgid, &ah_attr->grh.dgid, 16);
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ah->av.grh_gid_fl = cpu_to_be32(ah_attr->grh.flow_label |
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(1 << 30) |
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ah_attr->grh.sgid_index << 20);
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ah->av.hop_limit = ah_attr->grh.hop_limit;
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ah->av.tclass = ah_attr->grh.traffic_class;
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}
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ah->av.stat_rate_sl = (ah_attr->static_rate << 4);
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if (ll == IB_LINK_LAYER_ETHERNET) {
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memcpy(ah->av.rmac, ah_attr->dmac, sizeof(ah_attr->dmac));
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ah->av.udp_sport =
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mlx5_get_roce_udp_sport(dev,
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ah_attr->port_num,
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ah_attr->grh.sgid_index);
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ah->av.stat_rate_sl |= (ah_attr->sl & 0x7) << 1;
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} else {
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ah->av.rlid = cpu_to_be16(ah_attr->dlid);
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ah->av.fl_mlid = ah_attr->src_path_bits & 0x7f;
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ah->av.stat_rate_sl |= (ah_attr->sl & 0xf);
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}
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}
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int mlx5_ib_create_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr,
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u32 flags, struct ib_udata *udata)
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{
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struct mlx5_ib_ah *ah = to_mah(ibah);
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struct mlx5_ib_dev *dev = to_mdev(ibah->device);
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enum rdma_link_layer ll;
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ll = dev->ib_dev.get_link_layer(&dev->ib_dev, ah_attr->port_num);
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if (ll == IB_LINK_LAYER_ETHERNET && !(ah_attr->ah_flags & IB_AH_GRH))
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return -EINVAL;
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if (ll == IB_LINK_LAYER_ETHERNET && udata) {
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int err;
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struct mlx5_ib_create_ah_resp resp = {};
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u32 min_resp_len = offsetof(typeof(resp), dmac) +
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sizeof(resp.dmac);
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if (udata->outlen < min_resp_len)
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return -EINVAL;
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resp.response_length = min_resp_len;
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err = ib_resolve_eth_dmac(&dev->ib_dev, ah_attr);
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if (err)
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return err;
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memcpy(resp.dmac, ah_attr->dmac, ETH_ALEN);
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err = ib_copy_to_udata(udata, &resp, resp.response_length);
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if (err)
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return err;
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}
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create_ib_ah(dev, ah, ah_attr, ll);
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return 0;
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}
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int mlx5_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
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{
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struct mlx5_ib_ah *ah = to_mah(ibah);
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u32 tmp;
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memset(ah_attr, 0, sizeof(*ah_attr));
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tmp = be32_to_cpu(ah->av.grh_gid_fl);
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if (tmp & (1 << 30)) {
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ah_attr->ah_flags = IB_AH_GRH;
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ah_attr->grh.sgid_index = (tmp >> 20) & 0xff;
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ah_attr->grh.flow_label = tmp & 0xfffff;
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memcpy(&ah_attr->grh.dgid, ah->av.rgid, 16);
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ah_attr->grh.hop_limit = ah->av.hop_limit;
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ah_attr->grh.traffic_class = ah->av.tclass;
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}
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ah_attr->dlid = be16_to_cpu(ah->av.rlid);
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ah_attr->static_rate = ah->av.stat_rate_sl >> 4;
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ah_attr->sl = ah->av.stat_rate_sl & 0xf;
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return 0;
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}
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void mlx5_ib_destroy_ah(struct ib_ah *ah, u32 flags)
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{
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return;
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}
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