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 #include "hns_roce_hw_v2.h" 38 39 static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr) 40 { 41 u32 fl = ah_attr->grh.flow_label; 42 u16 sport; 43 44 if (!fl) 45 sport = get_random_u32_inclusive(IB_ROCE_UDP_ENCAP_VALID_PORT_MIN, 46 IB_ROCE_UDP_ENCAP_VALID_PORT_MAX); 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_ib_create_ah_resp resp = {}; 60 struct hns_roce_ah *ah = to_hr_ah(ibah); 61 u8 tclass = get_tclass(grh); 62 u8 priority = 0; 63 u8 tc_mode = 0; 64 int ret; 65 66 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata) { 67 ret = -EOPNOTSUPP; 68 goto err_out; 69 } 70 71 ah->av.port = rdma_ah_get_port_num(ah_attr); 72 ah->av.gid_index = grh->sgid_index; 73 74 if (rdma_ah_get_static_rate(ah_attr)) 75 ah->av.stat_rate = IB_RATE_10_GBPS; 76 77 ah->av.hop_limit = grh->hop_limit; 78 ah->av.flowlabel = grh->flow_label; 79 ah->av.udp_sport = get_ah_udp_sport(ah_attr); 80 ah->av.tclass = tclass; 81 82 ret = hr_dev->hw->get_dscp(hr_dev, tclass, &tc_mode, &priority); 83 if (ret == -EOPNOTSUPP) 84 ret = 0; 85 86 if (ret && grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) 87 goto err_out; 88 89 if (tc_mode == HNAE3_TC_MAP_MODE_DSCP && 90 grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) 91 ah->av.sl = priority; 92 else 93 ah->av.sl = rdma_ah_get_sl(ah_attr); 94 95 if (!check_sl_valid(hr_dev, ah->av.sl)) { 96 ret = -EINVAL; 97 goto err_out; 98 } 99 100 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE); 101 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN); 102 103 /* HIP08 needs to record vlan info in Address Vector */ 104 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) { 105 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr, 106 &ah->av.vlan_id, NULL); 107 if (ret) 108 goto err_out; 109 110 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID; 111 } 112 113 if (udata) { 114 resp.priority = ah->av.sl; 115 resp.tc_mode = tc_mode; 116 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN); 117 ret = ib_copy_to_udata(udata, &resp, 118 min(udata->outlen, sizeof(resp))); 119 } 120 121 err_out: 122 if (ret) 123 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]); 124 125 return ret; 126 } 127 128 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) 129 { 130 struct hns_roce_ah *ah = to_hr_ah(ibah); 131 132 memset(ah_attr, 0, sizeof(*ah_attr)); 133 134 rdma_ah_set_sl(ah_attr, ah->av.sl); 135 rdma_ah_set_port_num(ah_attr, ah->av.port); 136 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate); 137 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel, 138 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass); 139 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid); 140 141 return 0; 142 } 143