1 /* 2 * Copyright (c) 2016 Hisilicon Limited. 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/pci.h> 34 #include <rdma/ib_addr.h> 35 #include <rdma/ib_cache.h> 36 #include "hns_roce_device.h" 37 38 static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr) 39 { 40 u32 fl = ah_attr->grh.flow_label; 41 u16 sport; 42 43 if (!fl) 44 sport = prandom_u32_max(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 - 45 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) + 46 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN; 47 else 48 sport = rdma_flow_label_to_udp_sport(fl); 49 50 return sport; 51 } 52 53 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, 54 struct ib_udata *udata) 55 { 56 struct rdma_ah_attr *ah_attr = init_attr->ah_attr; 57 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr); 58 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device); 59 struct hns_roce_ah *ah = to_hr_ah(ibah); 60 int ret = 0; 61 62 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata) 63 return -EOPNOTSUPP; 64 65 ah->av.port = rdma_ah_get_port_num(ah_attr); 66 ah->av.gid_index = grh->sgid_index; 67 68 if (rdma_ah_get_static_rate(ah_attr)) 69 ah->av.stat_rate = IB_RATE_10_GBPS; 70 71 ah->av.hop_limit = grh->hop_limit; 72 ah->av.flowlabel = grh->flow_label; 73 ah->av.udp_sport = get_ah_udp_sport(ah_attr); 74 ah->av.sl = rdma_ah_get_sl(ah_attr); 75 ah->av.tclass = get_tclass(grh); 76 77 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE); 78 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN); 79 80 /* HIP08 needs to record vlan info in Address Vector */ 81 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) { 82 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr, 83 &ah->av.vlan_id, NULL); 84 if (ret) 85 return ret; 86 87 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID; 88 } 89 90 return ret; 91 } 92 93 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) 94 { 95 struct hns_roce_ah *ah = to_hr_ah(ibah); 96 97 memset(ah_attr, 0, sizeof(*ah_attr)); 98 99 rdma_ah_set_sl(ah_attr, ah->av.sl); 100 rdma_ah_set_port_num(ah_attr, ah->av.port); 101 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate); 102 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel, 103 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass); 104 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid); 105 106 return 0; 107 } 108