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/platform_device.h> 34 #include <rdma/ib_addr.h> 35 #include <rdma/ib_cache.h> 36 #include "hns_roce_device.h" 37 38 #define HNS_ROCE_PORT_NUM_SHIFT 24 39 #define HNS_ROCE_VLAN_SL_BIT_MASK 7 40 #define HNS_ROCE_VLAN_SL_SHIFT 13 41 42 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr, 43 u32 flags, struct ib_udata *udata) 44 { 45 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device); 46 const struct ib_gid_attr *gid_attr; 47 struct device *dev = hr_dev->dev; 48 struct hns_roce_ah *ah = to_hr_ah(ibah); 49 u16 vlan_tag = 0xffff; 50 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr); 51 bool vlan_en = false; 52 int ret; 53 54 gid_attr = ah_attr->grh.sgid_attr; 55 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_tag, NULL); 56 if (ret) 57 return ret; 58 59 /* Get mac address */ 60 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN); 61 62 if (vlan_tag < VLAN_CFI_MASK) { 63 vlan_en = true; 64 vlan_tag |= (rdma_ah_get_sl(ah_attr) & 65 HNS_ROCE_VLAN_SL_BIT_MASK) << 66 HNS_ROCE_VLAN_SL_SHIFT; 67 } 68 69 ah->av.port_pd = cpu_to_le32(to_hr_pd(ibah->pd)->pdn | 70 (rdma_ah_get_port_num(ah_attr) << 71 HNS_ROCE_PORT_NUM_SHIFT)); 72 ah->av.gid_index = grh->sgid_index; 73 ah->av.vlan = cpu_to_le16(vlan_tag); 74 ah->av.vlan_en = vlan_en; 75 dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index, 76 ah->av.vlan); 77 78 if (rdma_ah_get_static_rate(ah_attr)) 79 ah->av.stat_rate = IB_RATE_10_GBPS; 80 81 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE); 82 ah->av.sl_tclass_flowlabel = cpu_to_le32(rdma_ah_get_sl(ah_attr) << 83 HNS_ROCE_SL_SHIFT); 84 85 return 0; 86 } 87 88 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) 89 { 90 struct hns_roce_ah *ah = to_hr_ah(ibah); 91 92 memset(ah_attr, 0, sizeof(*ah_attr)); 93 94 rdma_ah_set_sl(ah_attr, (le32_to_cpu(ah->av.sl_tclass_flowlabel) >> 95 HNS_ROCE_SL_SHIFT)); 96 rdma_ah_set_port_num(ah_attr, (le32_to_cpu(ah->av.port_pd) >> 97 HNS_ROCE_PORT_NUM_SHIFT)); 98 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate); 99 rdma_ah_set_grh(ah_attr, NULL, 100 (le32_to_cpu(ah->av.sl_tclass_flowlabel) & 101 HNS_ROCE_FLOW_LABEL_MASK), ah->av.gid_index, 102 ah->av.hop_limit, 103 (le32_to_cpu(ah->av.sl_tclass_flowlabel) >> 104 HNS_ROCE_TCLASS_SHIFT)); 105 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid); 106 107 return 0; 108 } 109 110 void hns_roce_destroy_ah(struct ib_ah *ah, u32 flags) 111 { 112 return; 113 } 114