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 "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	else
49		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_ah *ah = to_hr_ah(ibah);
61	int ret = 0;
62	u32 max_sl;
63
64	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata)
65		return -EOPNOTSUPP;
66
67	ah->av.port = rdma_ah_get_port_num(ah_attr);
68	ah->av.gid_index = grh->sgid_index;
69
70	if (rdma_ah_get_static_rate(ah_attr))
71		ah->av.stat_rate = IB_RATE_10_GBPS;
72
73	ah->av.hop_limit = grh->hop_limit;
74	ah->av.flowlabel = grh->flow_label;
75	ah->av.udp_sport = get_ah_udp_sport(ah_attr);
76	ah->av.tclass = get_tclass(grh);
77
78	ah->av.sl = rdma_ah_get_sl(ah_attr);
79	max_sl = min_t(u32, MAX_SERVICE_LEVEL, hr_dev->caps.sl_num - 1);
80	if (unlikely(ah->av.sl > max_sl)) {
81		ibdev_err_ratelimited(&hr_dev->ib_dev,
82				      "failed to set sl, sl (%u) shouldn't be larger than %u.\n",
83				      ah->av.sl, max_sl);
84		return -EINVAL;
85	}
86
87	memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
88	memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
89
90	/* HIP08 needs to record vlan info in Address Vector */
91	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
92		ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
93					      &ah->av.vlan_id, NULL);
94		if (ret)
95			return ret;
96
97		ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
98	}
99
100	return ret;
101}
102
103int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
104{
105	struct hns_roce_ah *ah = to_hr_ah(ibah);
106
107	memset(ah_attr, 0, sizeof(*ah_attr));
108
109	rdma_ah_set_sl(ah_attr, ah->av.sl);
110	rdma_ah_set_port_num(ah_attr, ah->av.port);
111	rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
112	rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
113			ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
114	rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
115
116	return 0;
117}
118