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 <rdma/ib_addr.h>
35 #include <rdma/ib_cache.h>
36 #include "hns_roce_device.h"
37
38 #define HNS_ROCE_PORT_NUM_SHIFT 24
39 #define HNS_ROCE_VLAN_SL_BIT_MASK 7
40 #define HNS_ROCE_VLAN_SL_SHIFT 13
41
get_ah_udp_sport(const struct rdma_ah_attr * ah_attr)42 static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
43 {
44 u32 fl = ah_attr->grh.flow_label;
45 u16 sport;
46
47 if (!fl)
48 sport = get_random_u32() %
49 (IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
50 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
51 IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
52 else
53 sport = rdma_flow_label_to_udp_sport(fl);
54
55 return sport;
56 }
57
hns_roce_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)58 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
59 struct ib_udata *udata)
60 {
61 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
62 const struct ib_gid_attr *gid_attr;
63 struct device *dev = hr_dev->dev;
64 struct hns_roce_ah *ah = to_hr_ah(ibah);
65 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
66 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
67 u16 vlan_id = 0xffff;
68 bool vlan_en = false;
69 int ret;
70
71 gid_attr = ah_attr->grh.sgid_attr;
72 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL);
73 if (ret)
74 return ret;
75
76 /* Get mac address */
77 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
78
79 if (vlan_id < VLAN_N_VID) {
80 vlan_en = true;
81 vlan_id |= (rdma_ah_get_sl(ah_attr) &
82 HNS_ROCE_VLAN_SL_BIT_MASK) <<
83 HNS_ROCE_VLAN_SL_SHIFT;
84 }
85
86 ah->av.port = rdma_ah_get_port_num(ah_attr);
87 ah->av.gid_index = grh->sgid_index;
88 ah->av.vlan_id = vlan_id;
89 ah->av.vlan_en = vlan_en;
90 dev_dbg(dev, "gid_index = 0x%x,vlan_id = 0x%x\n", ah->av.gid_index,
91 ah->av.vlan_id);
92
93 if (rdma_ah_get_static_rate(ah_attr))
94 ah->av.stat_rate = IB_RATE_10_GBPS;
95
96 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
97 ah->av.sl = rdma_ah_get_sl(ah_attr);
98 ah->av.flowlabel = grh->flow_label;
99 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
100
101 return 0;
102 }
103
hns_roce_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)104 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
105 {
106 struct hns_roce_ah *ah = to_hr_ah(ibah);
107
108 memset(ah_attr, 0, sizeof(*ah_attr));
109
110 rdma_ah_set_sl(ah_attr, ah->av.sl);
111 rdma_ah_set_port_num(ah_attr, ah->av.port);
112 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
113 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
114 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
115 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
116
117 return 0;
118 }
119