hns_roce_ah.c

  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 <rdma/ib_addr.h>
 34#include <rdma/ib_cache.h>
 35#include "hns_roce_device.h"
 36#include "hns_roce_hw_v2.h"
 37
 38static 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 = get_random_u32_inclusive(IB_ROCE_UDP_ENCAP_VALID_PORT_MIN,
 45						 IB_ROCE_UDP_ENCAP_VALID_PORT_MAX);
 46	else
 47		sport = rdma_flow_label_to_udp_sport(fl);
 48
 49	return sport;
 50}
 51
 52int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
 53		       struct ib_udata *udata)
 54{
 55	struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
 56	const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
 57	struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
 58	struct hns_roce_ib_create_ah_resp resp = {};
 59	struct hns_roce_ah *ah = to_hr_ah(ibah);
 60	u8 tclass = get_tclass(grh);
 61	u8 priority = 0;
 62	u8 tc_mode = 0;
 63	int ret = 0;
 64
 65	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata) {
 66		ret = -EOPNOTSUPP;
 67		goto err_out;
 68	}
 69
 70	ah->av.port = rdma_ah_get_port_num(ah_attr);
 71	ah->av.gid_index = grh->sgid_index;
 72
 73	if (rdma_ah_get_static_rate(ah_attr))
 74		ah->av.stat_rate = IB_RATE_10_GBPS;
 75
 76	ah->av.hop_limit = grh->hop_limit;
 77	ah->av.flowlabel = grh->flow_label;
 78	ah->av.udp_sport = get_ah_udp_sport(ah_attr);
 79	ah->av.tclass = tclass;
 80	ah->av.sl = rdma_ah_get_sl(ah_attr);
 81
 82	if (grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
 83		ret = hr_dev->hw->get_dscp(hr_dev, tclass, &tc_mode, &priority);
 84		if (ret == -EOPNOTSUPP)
 85			ret = 0;
 86		else if (ret)
 87			goto err_out;
 88
 89		if (tc_mode == HNAE3_TC_MAP_MODE_DSCP)
 90			ah->av.sl = priority;
 91	}
 92
 93	if (!check_sl_valid(hr_dev, ah->av.sl)) {
 94		ret = -EINVAL;
 95		goto err_out;
 96	}
 97
 98	memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
 99	memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
100
101	/* HIP08 needs to record vlan info in Address Vector */
102	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
103		ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
104					      &ah->av.vlan_id, NULL);
105		if (ret)
106			goto err_out;
107
108		ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
109	}
110
111	if (udata) {
112		resp.priority = ah->av.sl;
113		resp.tc_mode = tc_mode;
114		memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
115		ret = ib_copy_to_udata(udata, &resp,
116				       min(udata->outlen, sizeof(resp)));
117	}
118
119err_out:
120	if (ret)
121		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]);
122
123	return ret;
124}
125
126int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
127{
128	struct hns_roce_ah *ah = to_hr_ah(ibah);
129
130	memset(ah_attr, 0, sizeof(*ah_attr));
131
132	rdma_ah_set_sl(ah_attr, ah->av.sl);
133	rdma_ah_set_port_num(ah_attr, ah->av.port);
134	rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
135	rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
136			ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
137	rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
138
139	return 0;
140}