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1/*2 * Copyright (c) 2016 Hisilicon Limited.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#include <linux/pci.h>34#include <rdma/ib_addr.h>35#include <rdma/ib_cache.h>36#include "hnae3.h"37#include "hns_roce_device.h"38#include "hns_roce_hw_v2.h"39 40static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)41{42 u32 fl = ah_attr->grh.flow_label;43 u16 sport;44 45 if (!fl)46 sport = get_random_u32_inclusive(IB_ROCE_UDP_ENCAP_VALID_PORT_MIN,47 IB_ROCE_UDP_ENCAP_VALID_PORT_MAX);48 else49 sport = rdma_flow_label_to_udp_sport(fl);50 51 return sport;52}53 54int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,55 struct ib_udata *udata)56{57 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;58 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);59 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);60 struct hns_roce_ib_create_ah_resp resp = {};61 struct hns_roce_ah *ah = to_hr_ah(ibah);62 u8 tclass = get_tclass(grh);63 u8 priority = 0;64 u8 tc_mode = 0;65 int ret;66 67 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata) {68 ret = -EOPNOTSUPP;69 goto err_out;70 }71 72 ah->av.port = rdma_ah_get_port_num(ah_attr);73 ah->av.gid_index = grh->sgid_index;74 75 if (rdma_ah_get_static_rate(ah_attr))76 ah->av.stat_rate = IB_RATE_10_GBPS;77 78 ah->av.hop_limit = grh->hop_limit;79 ah->av.flowlabel = grh->flow_label;80 ah->av.udp_sport = get_ah_udp_sport(ah_attr);81 ah->av.tclass = tclass;82 83 ret = hr_dev->hw->get_dscp(hr_dev, tclass, &tc_mode, &priority);84 if (ret == -EOPNOTSUPP)85 ret = 0;86 87 if (ret && grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)88 goto err_out;89 90 if (tc_mode == HNAE3_TC_MAP_MODE_DSCP &&91 grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)92 ah->av.sl = priority;93 else94 ah->av.sl = rdma_ah_get_sl(ah_attr);95 96 if (!check_sl_valid(hr_dev, ah->av.sl)) {97 ret = -EINVAL;98 goto err_out;99 }100 101 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);102 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);103 104 /* HIP08 needs to record vlan info in Address Vector */105 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {106 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,107 &ah->av.vlan_id, NULL);108 if (ret)109 goto err_out;110 111 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;112 }113 114 if (udata) {115 resp.priority = ah->av.sl;116 resp.tc_mode = tc_mode;117 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);118 ret = ib_copy_to_udata(udata, &resp,119 min(udata->outlen, sizeof(resp)));120 }121 122err_out:123 if (ret)124 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]);125 126 return ret;127}128 129int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)130{131 struct hns_roce_ah *ah = to_hr_ah(ibah);132 133 memset(ah_attr, 0, sizeof(*ah_attr));134 135 rdma_ah_set_sl(ah_attr, ah->av.sl);136 rdma_ah_set_port_num(ah_attr, ah->av.port);137 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);138 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,139 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);140 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);141 142 return 0;143}144