/* * Copyright (c) 2007 Cisco Systems, Inc. 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 #include #include #include #include #include "mlx4_ib.h" int mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr, u8 *mac, int *is_mcast, u8 port) { struct in6_addr in6; *is_mcast = 0; memcpy(&in6, ah_attr->grh.dgid.raw, sizeof in6); if (rdma_link_local_addr(&in6)) rdma_get_ll_mac(&in6, mac); else if (rdma_is_multicast_addr(&in6)) { rdma_get_mcast_mac(&in6, mac); *is_mcast = 1; } else return -EINVAL; return 0; } static struct ib_ah *create_ib_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, struct mlx4_ib_ah *ah) { struct mlx4_dev *dev = to_mdev(pd->device)->dev; ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); ah->av.ib.g_slid = ah_attr->src_path_bits; ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); if (ah_attr->ah_flags & IB_AH_GRH) { ah->av.ib.g_slid |= 0x80; ah->av.ib.gid_index = ah_attr->grh.sgid_index; ah->av.ib.hop_limit = ah_attr->grh.hop_limit; ah->av.ib.sl_tclass_flowlabel |= cpu_to_be32((ah_attr->grh.traffic_class << 20) | ah_attr->grh.flow_label); memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16); } ah->av.ib.dlid = cpu_to_be16(ah_attr->dlid); if (ah_attr->static_rate) { ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support)) --ah->av.ib.stat_rate; } return &ah->ibah; } static struct ib_ah *create_iboe_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, struct mlx4_ib_ah *ah) { struct mlx4_ib_dev *ibdev = to_mdev(pd->device); struct mlx4_dev *dev = ibdev->dev; union ib_gid sgid; u8 mac[6]; int err; int is_mcast; u16 vlan_tag; err = mlx4_ib_resolve_grh(ibdev, ah_attr, mac, &is_mcast, ah_attr->port_num); if (err) return ERR_PTR(err); memcpy(ah->av.eth.mac, mac, 6); err = ib_get_cached_gid(pd->device, ah_attr->port_num, ah_attr->grh.sgid_index, &sgid); if (err) return ERR_PTR(err); vlan_tag = rdma_get_vlan_id(&sgid); if (vlan_tag < 0x1000) vlan_tag |= (ah_attr->sl & 7) << 13; ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); ah->av.eth.gid_index = ah_attr->grh.sgid_index; ah->av.eth.vlan = cpu_to_be16(vlan_tag); if (ah_attr->static_rate) { ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support)) --ah->av.eth.stat_rate; } ah->av.eth.sl_tclass_flowlabel |= cpu_to_be32((ah_attr->grh.traffic_class << 20) | ah_attr->grh.flow_label); /* * HW requires multicast LID so we just choose one. */ if (is_mcast) ah->av.ib.dlid = cpu_to_be16(0xc000); memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16); ah->av.eth.sl_tclass_flowlabel |= cpu_to_be32(ah_attr->sl << 29); return &ah->ibah; } struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) { struct mlx4_ib_ah *ah; struct ib_ah *ret; ah = kzalloc(sizeof *ah, GFP_ATOMIC); if (!ah) return ERR_PTR(-ENOMEM); if (rdma_port_get_link_layer(pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) { if (!(ah_attr->ah_flags & IB_AH_GRH)) { ret = ERR_PTR(-EINVAL); } else { /* * TBD: need to handle the case when we get * called in an atomic context and there we * might sleep. We don't expect this * currently since we're working with link * local addresses which we can translate * without going to sleep. */ ret = create_iboe_ah(pd, ah_attr, ah); } if (IS_ERR(ret)) kfree(ah); return ret; } else return create_ib_ah(pd, ah_attr, ah); /* never fails */ } int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) { struct mlx4_ib_ah *ah = to_mah(ibah); enum rdma_link_layer ll; memset(ah_attr, 0, sizeof *ah_attr); ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24; ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num); if (ll == IB_LINK_LAYER_ETHERNET) ah_attr->sl = be32_to_cpu(ah->av.eth.sl_tclass_flowlabel) >> 29; else ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0; if (ah->av.ib.stat_rate) ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET; ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F; if (mlx4_ib_ah_grh_present(ah)) { ah_attr->ah_flags = IB_AH_GRH; ah_attr->grh.traffic_class = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20; ah_attr->grh.flow_label = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff; ah_attr->grh.hop_limit = ah->av.ib.hop_limit; ah_attr->grh.sgid_index = ah->av.ib.gid_index; memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16); } return 0; } int mlx4_ib_destroy_ah(struct ib_ah *ah) { kfree(to_mah(ah)); return 0; }