mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 03:17:59 +07:00
47ec386662
The core code now ensures that all driver callbacks that receive an rdma_ah_attrs will have a sgid_attr's pointer if there is a GRH present. Drivers can use this pointer instead of calling a query function with sgid_index. This simplifies the drivers and also avoids races where a gid_index lookup may return different data if it is changed. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/*
|
|
* 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 struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev,
|
|
struct mlx5_ib_ah *ah,
|
|
struct rdma_ah_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) {
|
|
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_get_roce_udp_sport(dev, ah_attr->grh.sgid_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);
|
|
}
|
|
|
|
return &ah->ibah;
|
|
}
|
|
|
|
struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
|
|
struct ib_udata *udata)
|
|
|
|
{
|
|
struct mlx5_ib_ah *ah;
|
|
struct mlx5_ib_dev *dev = to_mdev(pd->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 ERR_PTR(-EINVAL);
|
|
|
|
if (ah_type == RDMA_AH_ATTR_TYPE_ROCE && udata) {
|
|
int err;
|
|
struct mlx5_ib_create_ah_resp resp = {};
|
|
u32 min_resp_len = offsetof(typeof(resp), dmac) +
|
|
sizeof(resp.dmac);
|
|
|
|
if (udata->outlen < min_resp_len)
|
|
return ERR_PTR(-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_PTR(err);
|
|
}
|
|
|
|
ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
|
|
if (!ah)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
return create_ib_ah(dev, ah, ah_attr); /* never fails */
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
int mlx5_ib_destroy_ah(struct ib_ah *ah)
|
|
{
|
|
kfree(to_mah(ah));
|
|
return 0;
|
|
}
|