/*
* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "mlx5_ib.h"
static __be16 mlx5_ah_get_udp_sport(const struct mlx5_ib_dev *dev,
const struct rdma_ah_attr *ah_attr)
{
enum ib_gid_type gid_type = ah_attr->grh.sgid_attr->gid_type;
__be16 sport;
if ((gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) &&
(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) &&
(ah_attr->grh.flow_label & IB_GRH_FLOWLABEL_MASK))
sport = cpu_to_be16(
rdma_flow_label_to_udp_sport(ah_attr->grh.flow_label));
else
sport = mlx5_get_roce_udp_sport_min(dev,
ah_attr->grh.sgid_attr);
return sport;
}
static void create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah,
struct rdma_ah_init_attr *init_attr)
{
struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
enum ib_gid_type gid_type;
if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) {
const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
memcpy(ah->av.rgid, &grh->dgid, 16);
ah->av.grh_gid_fl = cpu_to_be32(grh->flow_label |
(1 << 30) |
grh->sgid_index << 20);
ah->av.hop_limit = grh->hop_limit;
ah->av.tclass = grh->traffic_class;
}
ah->av.stat_rate_sl = (rdma_ah_get_static_rate(ah_attr) << 4);
if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
if (init_attr->xmit_slave)
ah->xmit_port =
mlx5_lag_get_slave_port(dev->mdev,
init_attr->xmit_slave);
gid_type = ah_attr->grh.sgid_attr->gid_type;
memcpy(ah->av.rmac, ah_attr->roce.dmac,
sizeof(ah_attr->roce.dmac));
ah->av.udp_sport = mlx5_ah_get_udp_sport(dev, ah_attr);
ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0x7) << 1;
if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
#define MLX5_ECN_ENABLED BIT(1)
ah->av.tclass |= MLX5_ECN_ENABLED;
} else {
ah->av.rlid = cpu_to_be16(rdma_ah_get_dlid(ah_attr));
ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f;
ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf);
}
}
int mlx5_ib_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
struct ib_udata *udata)
{
struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
struct mlx5_ib_ah *ah = to_mah(ibah);
struct mlx5_ib_dev *dev = to_mdev(ibah->device);
enum rdma_ah_attr_type ah_type = ah_attr->type;
if ((ah_type == RDMA_AH_ATTR_TYPE_ROCE) &&
!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
return -EINVAL;
if (ah_type == RDMA_AH_ATTR_TYPE_ROCE && udata) {
int err;
struct mlx5_ib_create_ah_resp resp = {};
u32 min_resp_len =
offsetofend(struct mlx5_ib_create_ah_resp, dmac);
if (udata->outlen < min_resp_len)
return -EINVAL;
resp.response_length = min_resp_len;
memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
err = ib_copy_to_udata(udata, &resp, resp.response_length);
if (err)
return err;
}
create_ib_ah(dev, ah, init_attr);
return 0;
}
int mlx5_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
{
struct mlx5_ib_ah *ah = to_mah(ibah);
u32 tmp;
memset(ah_attr, 0, sizeof(*ah_attr));
ah_attr->type = ibah->type;
tmp = be32_to_cpu(ah->av.grh_gid_fl);
if (tmp & (1 << 30)) {
rdma_ah_set_grh(ah_attr, NULL,
tmp & 0xfffff,
(tmp >> 20) & 0xff,
ah->av.hop_limit,
ah->av.tclass);
rdma_ah_set_dgid_raw(ah_attr, ah->av.rgid);
}
rdma_ah_set_dlid(ah_attr, be16_to_cpu(ah->av.rlid));
rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate_sl >> 4);
rdma_ah_set_sl(ah_attr, ah->av.stat_rate_sl & 0xf);
return 0;
}
