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, struct ib_ah_attr *ah_attr)
44 struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
45 struct device *dev = &hr_dev->pdev->dev;
46 struct ib_gid_attr gid_attr;
47 struct hns_roce_ah *ah;
48 u16 vlan_tag = 0xffff;
53 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
55 return ERR_PTR(-ENOMEM);
58 memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(ah_attr->grh.dgid.raw));
59 if (rdma_is_multicast_addr(&in6))
60 rdma_get_mcast_mac(&in6, ah->av.mac);
62 memcpy(ah->av.mac, ah_attr->dmac, sizeof(ah_attr->dmac));
65 ret = ib_get_cached_gid(ibpd->device, ah_attr->port_num,
66 ah_attr->grh.sgid_index, &sgid, &gid_attr);
68 dev_err(dev, "get sgid failed! ret = %d\n", ret);
74 if (is_vlan_dev(gid_attr.ndev))
75 vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
76 dev_put(gid_attr.ndev);
79 if (vlan_tag < 0x1000)
80 vlan_tag |= (ah_attr->sl & HNS_ROCE_VLAN_SL_BIT_MASK) <<
81 HNS_ROCE_VLAN_SL_SHIFT;
83 ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn | (ah_attr->port_num <<
84 HNS_ROCE_PORT_NUM_SHIFT));
85 ah->av.gid_index = ah_attr->grh.sgid_index;
86 ah->av.vlan = cpu_to_le16(vlan_tag);
87 dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
90 if (ah_attr->static_rate)
91 ah->av.stat_rate = IB_RATE_10_GBPS;
93 memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, HNS_ROCE_GID_SIZE);
94 ah->av.sl_tclass_flowlabel = cpu_to_le32(ah_attr->sl <<
100 int hns_roce_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
102 struct hns_roce_ah *ah = to_hr_ah(ibah);
104 memset(ah_attr, 0, sizeof(*ah_attr));
106 ah_attr->sl = le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
108 ah_attr->port_num = le32_to_cpu(ah->av.port_pd) >>
109 HNS_ROCE_PORT_NUM_SHIFT;
110 ah_attr->static_rate = ah->av.stat_rate;
111 ah_attr->ah_flags = IB_AH_GRH;
112 ah_attr->grh.traffic_class = le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
113 HNS_ROCE_TCLASS_SHIFT;
114 ah_attr->grh.flow_label = le32_to_cpu(ah->av.sl_tclass_flowlabel) &
115 HNS_ROCE_FLOW_LABLE_MASK;
116 ah_attr->grh.hop_limit = ah->av.hop_limit;
117 ah_attr->grh.sgid_index = ah->av.gid_index;
118 memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, HNS_ROCE_GID_SIZE);
123 int hns_roce_destroy_ah(struct ib_ah *ah)