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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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