/*
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* Copyright (c) 2016 Hisilicon Limited.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/platform_device.h>
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#include <linux/pci.h>
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#include <rdma/ib_addr.h>
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#include <rdma/ib_cache.h>
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#include "hns_roce_device.h"
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static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
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{
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u32 fl = ah_attr->grh.flow_label;
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u16 sport;
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if (!fl)
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sport = get_random_u32() %
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(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
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IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
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IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
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else
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sport = rdma_flow_label_to_udp_sport(fl);
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return sport;
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}
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int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
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struct ib_udata *udata)
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{
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struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
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const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
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struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
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struct hns_roce_ah *ah = to_hr_ah(ibah);
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int ret = 0;
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ah->av.port = rdma_ah_get_port_num(ah_attr);
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ah->av.gid_index = grh->sgid_index;
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if (rdma_ah_get_static_rate(ah_attr))
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ah->av.stat_rate = IB_RATE_10_GBPS;
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ah->av.hop_limit = grh->hop_limit;
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ah->av.flowlabel = grh->flow_label;
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ah->av.udp_sport = get_ah_udp_sport(ah_attr);
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ah->av.sl = rdma_ah_get_sl(ah_attr);
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ah->av.tclass = get_tclass(grh);
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memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
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memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
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/* HIP08 needs to record vlan info in Address Vector */
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if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08) {
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ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
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&ah->av.vlan_id, NULL);
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if (ret)
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return ret;
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ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
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}
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return ret;
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}
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int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
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{
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struct hns_roce_ah *ah = to_hr_ah(ibah);
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memset(ah_attr, 0, sizeof(*ah_attr));
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rdma_ah_set_sl(ah_attr, ah->av.sl);
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rdma_ah_set_port_num(ah_attr, ah->av.port);
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rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
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rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
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ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
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rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
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return 0;
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}
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