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 |