1/* 2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33#include <linux/slab.h> 34 35#include "mlx4_ib.h" 36 37struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 38{ 39 struct mlx4_dev *dev = to_mdev(pd->device)->dev; 40 struct mlx4_ib_ah *ah; 41 42 ah = kmalloc(sizeof *ah, GFP_ATOMIC); 43 if (!ah) 44 return ERR_PTR(-ENOMEM); 45 46 memset(&ah->av, 0, sizeof ah->av); 47 48 ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); 49 ah->av.g_slid = ah_attr->src_path_bits; 50 ah->av.dlid = cpu_to_be16(ah_attr->dlid); 51 if (ah_attr->static_rate) { 52 ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; 53 while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 54 !(1 << ah->av.stat_rate & dev->caps.stat_rate_support)) 55 --ah->av.stat_rate; 56 } 57 ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); 58 if (ah_attr->ah_flags & IB_AH_GRH) { 59 ah->av.g_slid |= 0x80; 60 ah->av.gid_index = ah_attr->grh.sgid_index; 61 ah->av.hop_limit = ah_attr->grh.hop_limit; 62 ah->av.sl_tclass_flowlabel |= 63 cpu_to_be32((ah_attr->grh.traffic_class << 20) | 64 ah_attr->grh.flow_label); 65 memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16); 66 } 67 68 return &ah->ibah; 69} 70 71int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) 72{ 73 struct mlx4_ib_ah *ah = to_mah(ibah); 74 75 memset(ah_attr, 0, sizeof *ah_attr); 76 ah_attr->dlid = be16_to_cpu(ah->av.dlid); 77 ah_attr->sl = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28; 78 ah_attr->port_num = be32_to_cpu(ah->av.port_pd) >> 24; 79 if (ah->av.stat_rate) 80 ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET; 81 ah_attr->src_path_bits = ah->av.g_slid & 0x7F; 82 83 if (mlx4_ib_ah_grh_present(ah)) { 84 ah_attr->ah_flags = IB_AH_GRH; 85 86 ah_attr->grh.traffic_class = 87 be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20; 88 ah_attr->grh.flow_label = 89 be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff; 90 ah_attr->grh.hop_limit = ah->av.hop_limit; 91 ah_attr->grh.sgid_index = ah->av.gid_index; 92 memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, 16); 93 } 94 95 return 0; 96} 97 98int mlx4_ib_destroy_ah(struct ib_ah *ah) 99{ 100 kfree(to_mah(ah)); 101 return 0; 102} 103