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
get_ah_udp_sport(const struct rdma_ah_attr * ah_attr)40 static 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
hns_roce_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)54 int 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_ib_create_ah_resp resp = {};
61 struct hns_roce_ah *ah = to_hr_ah(ibah);
62 u8 tclass = get_tclass(grh);
63 u8 priority = 0;
64 u8 tc_mode = 0;
65 int ret;
66
67 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata) {
68 ret = -EOPNOTSUPP;
69 goto err_out;
70 }
71
72 ah->av.port = rdma_ah_get_port_num(ah_attr);
73 ah->av.gid_index = grh->sgid_index;
74
75 if (rdma_ah_get_static_rate(ah_attr))
76 ah->av.stat_rate = IB_RATE_10_GBPS;
77
78 ah->av.hop_limit = grh->hop_limit;
79 ah->av.flowlabel = grh->flow_label;
80 ah->av.udp_sport = get_ah_udp_sport(ah_attr);
81 ah->av.tclass = tclass;
82
83 ret = hr_dev->hw->get_dscp(hr_dev, tclass, &tc_mode, &priority);
84 if (ret == -EOPNOTSUPP)
85 ret = 0;
86
87 if (ret && grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
88 goto err_out;
89
90 if (tc_mode == HNAE3_TC_MAP_MODE_DSCP &&
91 grh->sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
92 ah->av.sl = priority;
93 else
94 ah->av.sl = rdma_ah_get_sl(ah_attr);
95
96 if (!check_sl_valid(hr_dev, ah->av.sl)) {
97 ret = -EINVAL;
98 goto err_out;
99 }
100
101 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
102 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
103
104 /* HIP08 needs to record vlan info in Address Vector */
105 if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
106 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
107 &ah->av.vlan_id, NULL);
108 if (ret)
109 goto err_out;
110
111 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
112 }
113
114 if (udata) {
115 resp.priority = ah->av.sl;
116 resp.tc_mode = tc_mode;
117 memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
118 ret = ib_copy_to_udata(udata, &resp,
119 min(udata->outlen, sizeof(resp)));
120 }
121
122 err_out:
123 if (ret)
124 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]);
125
126 return ret;
127 }
128
hns_roce_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)129 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
130 {
131 struct hns_roce_ah *ah = to_hr_ah(ibah);
132
133 memset(ah_attr, 0, sizeof(*ah_attr));
134
135 rdma_ah_set_sl(ah_attr, ah->av.sl);
136 rdma_ah_set_port_num(ah_attr, ah->av.port);
137 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
138 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
139 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
140 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
141
142 return 0;
143 }
144