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
hns_roce_create_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr,u32 flags,struct ib_udata * udata)42 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr,
43 u32 flags, struct ib_udata *udata)
44 {
45 struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
46 const struct ib_gid_attr *gid_attr;
47 struct device *dev = hr_dev->dev;
48 struct hns_roce_ah *ah = to_hr_ah(ibah);
49 u16 vlan_tag = 0xffff;
50 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
51 bool vlan_en = false;
52 int ret;
53
54 gid_attr = ah_attr->grh.sgid_attr;
55 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_tag, NULL);
56 if (ret)
57 return ret;
58
59 /* Get mac address */
60 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
61
62 if (vlan_tag < VLAN_CFI_MASK) {
63 vlan_en = true;
64 vlan_tag |= (rdma_ah_get_sl(ah_attr) &
65 HNS_ROCE_VLAN_SL_BIT_MASK) <<
66 HNS_ROCE_VLAN_SL_SHIFT;
67 }
68
69 ah->av.port = rdma_ah_get_port_num(ah_attr);
70 ah->av.gid_index = grh->sgid_index;
71 ah->av.vlan = vlan_tag;
72 ah->av.vlan_en = vlan_en;
73 dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
74 ah->av.vlan);
75
76 if (rdma_ah_get_static_rate(ah_attr))
77 ah->av.stat_rate = IB_RATE_10_GBPS;
78
79 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
80 ah->av.sl = rdma_ah_get_sl(ah_attr);
81
82 return 0;
83 }
84
hns_roce_query_ah(struct ib_ah * ibah,struct rdma_ah_attr * ah_attr)85 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
86 {
87 struct hns_roce_ah *ah = to_hr_ah(ibah);
88
89 memset(ah_attr, 0, sizeof(*ah_attr));
90
91 rdma_ah_set_sl(ah_attr, ah->av.sl);
92 rdma_ah_set_port_num(ah_attr, ah->av.port);
93 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
94 rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
95 ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
96 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
97
98 return 0;
99 }
100
hns_roce_destroy_ah(struct ib_ah * ah,u32 flags)101 void hns_roce_destroy_ah(struct ib_ah *ah, u32 flags)
102 {
103 return;
104 }
105