1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
3 * Copyright(c) 2017 Intel Corporation.
9 #include <rdma/opa_smi.h>
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)) \
15 #define OPA_GID_INDEX 0x1
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
22 #define OPA_MCAST_NR 0x4 /* Number of top bits set */
23 #define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
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.
31 * @gid: The Global identifier
33 static inline bool ib_is_opa_gid(const union ib_gid *gid)
35 return ((be64_to_cpu(gid->global.interface_id) >> 40) ==
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
44 * @gid: The Global identifier
46 static inline u32 opa_get_lid_from_gid(const union ib_gid *gid)
48 return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF;
52 * opa_is_extended_lid: Returns true if dlid or slid are
58 static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid)
60 if ((be32_to_cpu(dlid) >=
61 be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
63 be16_to_cpu(IB_MULTICAST_LID_BASE)))
69 /* Get multicast lid base */
70 static inline u32 opa_get_mcast_base(u32 nr_top_bits)
72 return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
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)
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))
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))
91 #endif /* OPA_ADDR_H */