1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2 /*
3 * Copyright(c) 2017 Intel Corporation.
4 */
5
6 #ifndef OPA_ADDR_H
7 #define OPA_ADDR_H
8
9 #include <rdma/opa_smi.h>
10
11 #define OPA_SPECIAL_OUI (0x00066AULL)
12 #define OPA_MAKE_ID(x) (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x)))
13 #define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \
14 ? 0 : x)
15 #define OPA_GID_INDEX 0x1
16 /**
17 * 0xF8 - 4 bits of multicast range and 1 bit for collective range
18 * Example: For 24 bit LID space,
19 * Multicast range: 0xF00000 to 0xF7FFFF
20 * Collective range: 0xF80000 to 0xFFFFFE
21 */
22 #define OPA_MCAST_NR 0x4 /* Number of top bits set */
23 #define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
24
25 /**
26 * ib_is_opa_gid: Returns true if the top 24 bits of the gid
27 * contains the OPA_STL_OUI identifier. This identifies that
28 * the provided gid is a special purpose GID meant to carry
29 * extended LID information.
30 *
31 * @gid: The Global identifier
32 */
33 static inline bool ib_is_opa_gid(const union ib_gid *gid)
34 {
35 return ((be64_to_cpu(gid->global.interface_id) >> 40) ==
36 OPA_SPECIAL_OUI);
37 }
38
39 /**
40 * opa_get_lid_from_gid: Returns the last 32 bits of the gid.
41 * OPA devices use one of the gids in the gid table to also
42 * store the lid.
43 *
44 * @gid: The Global identifier
45 */
46 static inline u32 opa_get_lid_from_gid(const union ib_gid *gid)
47 {
48 return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF;
49 }
50
51 /**
52 * opa_is_extended_lid: Returns true if dlid or slid are
53 * extended.
54 *
55 * @dlid: The DLID
56 * @slid: The SLID
57 */
58 static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid)
59 {
60 if ((be32_to_cpu(dlid) >=
61 be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
62 (be32_to_cpu(slid) >=
63 be16_to_cpu(IB_MULTICAST_LID_BASE)))
64 return true;
65
66 return false;
67 }
68
69 /* Get multicast lid base */
70 static inline u32 opa_get_mcast_base(u32 nr_top_bits)
71 {
72 return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
73 }
74
75 /* Check for a valid unicast LID for non-SM traffic types */
76 static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr)
77 {
78 if (attr->type == RDMA_AH_ATTR_TYPE_IB) {
79 if (!rdma_ah_get_dlid(attr) ||
80 rdma_ah_get_dlid(attr) >=
81 be16_to_cpu(IB_MULTICAST_LID_BASE))
82 return false;
83 } else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) {
84 if (!rdma_ah_get_dlid(attr) ||
85 rdma_ah_get_dlid(attr) >=
86 opa_get_mcast_base(OPA_MCAST_NR))
87 return false;
88 }
89 return true;
90 }
91 #endif /* OPA_ADDR_H */
92
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