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 <linux/pci.h>
35#include <rdma/ib_addr.h>
36#include <rdma/ib_cache.h>
37#include "hns_roce_device.h"
38
39static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
40{
41	u32 fl = ah_attr->grh.flow_label;
42	u16 sport;
43
44	if (!fl)
45		sport = get_random_u32() %
46			(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
47			 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
48			IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
49	else
50		sport = rdma_flow_label_to_udp_sport(fl);
51
52	return sport;
53}
54
55int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
56		       struct ib_udata *udata)
57{
58	struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
59	const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
60	struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
61	struct hns_roce_ah *ah = to_hr_ah(ibah);
62	int ret = 0;
63
64	ah->av.port = rdma_ah_get_port_num(ah_attr);
65	ah->av.gid_index = grh->sgid_index;
66
67	if (rdma_ah_get_static_rate(ah_attr))
68		ah->av.stat_rate = IB_RATE_10_GBPS;
69
70	ah->av.hop_limit = grh->hop_limit;
71	ah->av.flowlabel = grh->flow_label;
72	ah->av.udp_sport = get_ah_udp_sport(ah_attr);
73	ah->av.sl = rdma_ah_get_sl(ah_attr);
74	ah->av.tclass = get_tclass(grh);
75
76	memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
77	memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
78
79	/* HIP08 needs to record vlan info in Address Vector */
80	if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08) {
81		ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
82					      &ah->av.vlan_id, NULL);
83		if (ret)
84			return ret;
85
86		ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
87	}
88
89	return ret;
90}
91
92int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
93{
94	struct hns_roce_ah *ah = to_hr_ah(ibah);
95
96	memset(ah_attr, 0, sizeof(*ah_attr));
97
98	rdma_ah_set_sl(ah_attr, ah->av.sl);
99	rdma_ah_set_port_num(ah_attr, ah->av.port);
100	rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
101	rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
102			ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
103	rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
104
105	return 0;
106}
107