139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/*
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* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "mlx5_ib.h"
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static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev,
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struct mlx5_ib_ah *ah,
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struct rdma_ah_attr *ah_attr)
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{
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enum ib_gid_type gid_type;
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if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
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const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
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memcpy(ah->av.rgid, &grh->dgid, 16);
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ah->av.grh_gid_fl = cpu_to_be32(grh->flow_label |
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(1 << 30) |
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grh->sgid_index << 20);
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ah->av.hop_limit = grh->hop_limit;
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ah->av.tclass = grh->traffic_class;
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}
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ah->av.stat_rate_sl = (rdma_ah_get_static_rate(ah_attr) << 4);
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if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
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gid_type = ah_attr->grh.sgid_attr->gid_type;
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memcpy(ah->av.rmac, ah_attr->roce.dmac,
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sizeof(ah_attr->roce.dmac));
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ah->av.udp_sport =
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mlx5_get_roce_udp_sport(dev, ah_attr->grh.sgid_attr);
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ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0x7) << 1;
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if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
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#define MLX5_ECN_ENABLED BIT(1)
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ah->av.tclass |= MLX5_ECN_ENABLED;
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} else {
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ah->av.rlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
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ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f;
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ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf);
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}
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return &ah->ibah;
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}
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struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
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struct ib_udata *udata)
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{
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struct mlx5_ib_ah *ah;
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struct mlx5_ib_dev *dev = to_mdev(pd->device);
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enum rdma_ah_attr_type ah_type = ah_attr->type;
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if ((ah_type == RDMA_AH_ATTR_TYPE_ROCE) &&
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!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
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return ERR_PTR(-EINVAL);
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if (ah_type == RDMA_AH_ATTR_TYPE_ROCE && 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 ERR_PTR(-EINVAL);
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resp.response_length = min_resp_len;
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memcpy(resp.dmac, ah_attr->roce.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_PTR(err);
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}
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ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
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if (!ah)
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return ERR_PTR(-ENOMEM);
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return create_ib_ah(dev, ah, ah_attr); /* never fails */
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}
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int mlx5_ib_query_ah(struct ib_ah *ibah, struct rdma_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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ah_attr->type = ibah->type;
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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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rdma_ah_set_grh(ah_attr, NULL,
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tmp & 0xfffff,
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(tmp >> 20) & 0xff,
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ah->av.hop_limit,
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ah->av.tclass);
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rdma_ah_set_dgid_raw(ah_attr, ah->av.rgid);
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}
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rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.rlid));
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rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate_sl >> 4);
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rdma_ah_set_sl(ah_attr, ah->av.stat_rate_sl & 0xf);
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return 0;
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}
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int mlx5_ib_destroy_ah(struct ib_ah *ah)
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{
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kfree(to_mah(ah));
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return 0;
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}
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