diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx5/ah.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/ah.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/ah.c b/drivers/infiniband/hw/mlx5/ah.c new file mode 100644 index 000000000..ffd03bf1a --- /dev/null +++ b/drivers/infiniband/hw/mlx5/ah.c @@ -0,0 +1,138 @@ +/* + * 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; +} |