2 * Copyright (c) 2016 Hisilicon Limited.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
33 #include <linux/platform_device.h>
34 #include <rdma/ib_addr.h>
35 #include <rdma/ib_cache.h>
36 #include "hns_roce_device.h"
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
42 struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd,
43 struct rdma_ah_attr *ah_attr,
45 struct ib_udata *udata)
47 struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
48 const struct ib_gid_attr *gid_attr;
49 struct device *dev = hr_dev->dev;
50 struct hns_roce_ah *ah;
51 u16 vlan_tag = 0xffff;
52 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
55 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
57 return ERR_PTR(-ENOMEM);
60 memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
62 gid_attr = ah_attr->grh.sgid_attr;
63 if (is_vlan_dev(gid_attr->ndev)) {
64 vlan_tag = vlan_dev_vlan_id(gid_attr->ndev);
68 if (vlan_tag < 0x1000)
69 vlan_tag |= (rdma_ah_get_sl(ah_attr) &
70 HNS_ROCE_VLAN_SL_BIT_MASK) <<
71 HNS_ROCE_VLAN_SL_SHIFT;
73 ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn |
74 (rdma_ah_get_port_num(ah_attr) <<
75 HNS_ROCE_PORT_NUM_SHIFT));
76 ah->av.gid_index = grh->sgid_index;
77 ah->av.vlan = cpu_to_le16(vlan_tag);
78 ah->av.vlan_en = vlan_en;
79 dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
82 if (rdma_ah_get_static_rate(ah_attr))
83 ah->av.stat_rate = IB_RATE_10_GBPS;
85 memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
86 ah->av.sl_tclass_flowlabel = cpu_to_le32(rdma_ah_get_sl(ah_attr) <<
92 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
94 struct hns_roce_ah *ah = to_hr_ah(ibah);
96 memset(ah_attr, 0, sizeof(*ah_attr));
98 rdma_ah_set_sl(ah_attr, (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
100 rdma_ah_set_port_num(ah_attr, (le32_to_cpu(ah->av.port_pd) >>
101 HNS_ROCE_PORT_NUM_SHIFT));
102 rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
103 rdma_ah_set_grh(ah_attr, NULL,
104 (le32_to_cpu(ah->av.sl_tclass_flowlabel) &
105 HNS_ROCE_FLOW_LABEL_MASK), ah->av.gid_index,
107 (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
108 HNS_ROCE_TCLASS_SHIFT));
109 rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
114 int hns_roce_destroy_ah(struct ib_ah *ah, u32 flags)