1 /*
2 * Copyright(c) 2017 Intel Corporation.
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47
48 #ifndef OPA_ADDR_H
49 #define OPA_ADDR_H
50
51 #include <rdma/opa_smi.h>
52
53 #define OPA_SPECIAL_OUI (0x00066AULL)
54 #define OPA_MAKE_ID(x) (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x)))
55 #define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \
56 ? 0 : x)
57 #define OPA_GID_INDEX 0x1
58 /**
59 * 0xF8 - 4 bits of multicast range and 1 bit for collective range
60 * Example: For 24 bit LID space,
61 * Multicast range: 0xF00000 to 0xF7FFFF
62 * Collective range: 0xF80000 to 0xFFFFFE
63 */
64 #define OPA_MCAST_NR 0x4 /* Number of top bits set */
65 #define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
66
67 /**
68 * ib_is_opa_gid: Returns true if the top 24 bits of the gid
69 * contains the OPA_STL_OUI identifier. This identifies that
70 * the provided gid is a special purpose GID meant to carry
71 * extended LID information.
72 *
73 * @gid: The Global identifier
74 */
75 static inline bool ib_is_opa_gid(const union ib_gid *gid)
76 {
77 return ((be64_to_cpu(gid->global.interface_id) >> 40) ==
78 OPA_SPECIAL_OUI);
79 }
80
81 /**
82 * opa_get_lid_from_gid: Returns the last 32 bits of the gid.
83 * OPA devices use one of the gids in the gid table to also
84 * store the lid.
85 *
86 * @gid: The Global identifier
87 */
88 static inline u32 opa_get_lid_from_gid(const union ib_gid *gid)
89 {
90 return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF;
91 }
92
93 /**
94 * opa_is_extended_lid: Returns true if dlid or slid are
95 * extended.
96 *
97 * @dlid: The DLID
98 * @slid: The SLID
99 */
100 static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid)
101 {
102 if ((be32_to_cpu(dlid) >=
103 be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
104 (be32_to_cpu(slid) >=
105 be16_to_cpu(IB_MULTICAST_LID_BASE)))
106 return true;
107
108 return false;
109 }
110
111 /* Get multicast lid base */
112 static inline u32 opa_get_mcast_base(u32 nr_top_bits)
113 {
114 return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
115 }
116
117 /* Check for a valid unicast LID for non-SM traffic types */
118 static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr)
119 {
120 if (attr->type == RDMA_AH_ATTR_TYPE_IB) {
121 if (!rdma_ah_get_dlid(attr) ||
122 rdma_ah_get_dlid(attr) >=
123 be16_to_cpu(IB_MULTICAST_LID_BASE))
124 return false;
125 } else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) {
126 if (!rdma_ah_get_dlid(attr) ||
127 rdma_ah_get_dlid(attr) >=
128 opa_get_mcast_base(OPA_MCAST_NR))
129 return false;
130 }
131 return true;
132 }
133 #endif /* OPA_ADDR_H */