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- /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
- /*
- * Copyright(c) 2017 Intel Corporation.
- */
- #ifndef OPA_ADDR_H
- #define OPA_ADDR_H
- #include <rdma/opa_smi.h>
- #define OPA_SPECIAL_OUI (0x00066AULL)
- #define OPA_MAKE_ID(x) (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x)))
- #define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \
- ? 0 : x)
- #define OPA_GID_INDEX 0x1
- /**
- * 0xF8 - 4 bits of multicast range and 1 bit for collective range
- * Example: For 24 bit LID space,
- * Multicast range: 0xF00000 to 0xF7FFFF
- * Collective range: 0xF80000 to 0xFFFFFE
- */
- #define OPA_MCAST_NR 0x4 /* Number of top bits set */
- #define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
- /**
- * ib_is_opa_gid: Returns true if the top 24 bits of the gid
- * contains the OPA_STL_OUI identifier. This identifies that
- * the provided gid is a special purpose GID meant to carry
- * extended LID information.
- *
- * @gid: The Global identifier
- */
- static inline bool ib_is_opa_gid(const union ib_gid *gid)
- {
- return ((be64_to_cpu(gid->global.interface_id) >> 40) ==
- OPA_SPECIAL_OUI);
- }
- /**
- * opa_get_lid_from_gid: Returns the last 32 bits of the gid.
- * OPA devices use one of the gids in the gid table to also
- * store the lid.
- *
- * @gid: The Global identifier
- */
- static inline u32 opa_get_lid_from_gid(const union ib_gid *gid)
- {
- return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF;
- }
- /**
- * opa_is_extended_lid: Returns true if dlid or slid are
- * extended.
- *
- * @dlid: The DLID
- * @slid: The SLID
- */
- static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid)
- {
- if ((be32_to_cpu(dlid) >=
- be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
- (be32_to_cpu(slid) >=
- be16_to_cpu(IB_MULTICAST_LID_BASE)))
- return true;
- return false;
- }
- /* Get multicast lid base */
- static inline u32 opa_get_mcast_base(u32 nr_top_bits)
- {
- return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
- }
- /* Check for a valid unicast LID for non-SM traffic types */
- static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr)
- {
- if (attr->type == RDMA_AH_ATTR_TYPE_IB) {
- if (!rdma_ah_get_dlid(attr) ||
- rdma_ah_get_dlid(attr) >=
- be16_to_cpu(IB_MULTICAST_LID_BASE))
- return false;
- } else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) {
- if (!rdma_ah_get_dlid(attr) ||
- rdma_ah_get_dlid(attr) >=
- opa_get_mcast_base(OPA_MCAST_NR))
- return false;
- }
- return true;
- }
- #endif /* OPA_ADDR_H */
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