134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/*
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* Copyright(c) 2017 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef OPA_ADDR_H
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#define OPA_ADDR_H
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#include <rdma/opa_smi.h>
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#define OPA_SPECIAL_OUI (0x00066AULL)
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#define OPA_MAKE_ID(x) (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x)))
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#define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \
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? 0 : x)
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#define OPA_GID_INDEX 0x1
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/**
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* 0xF8 - 4 bits of multicast range and 1 bit for collective range
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* Example: For 24 bit LID space,
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* Multicast range: 0xF00000 to 0xF7FFFF
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* Collective range: 0xF80000 to 0xFFFFFE
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*/
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#define OPA_MCAST_NR 0x4 /* Number of top bits set */
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#define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
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/**
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* ib_is_opa_gid: Returns true if the top 24 bits of the gid
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* contains the OPA_STL_OUI identifier. This identifies that
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* the provided gid is a special purpose GID meant to carry
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* extended LID information.
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*
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* @gid: The Global identifier
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*/
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static inline bool ib_is_opa_gid(const union ib_gid *gid)
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{
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return ((be64_to_cpu(gid->global.interface_id) >> 40) ==
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OPA_SPECIAL_OUI);
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}
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/**
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* opa_get_lid_from_gid: Returns the last 32 bits of the gid.
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* OPA devices use one of the gids in the gid table to also
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* store the lid.
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*
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* @gid: The Global identifier
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*/
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static inline u32 opa_get_lid_from_gid(const union ib_gid *gid)
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{
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return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF;
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}
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/**
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* opa_is_extended_lid: Returns true if dlid or slid are
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* extended.
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*
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* @dlid: The DLID
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* @slid: The SLID
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*/
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static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid)
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{
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if ((be32_to_cpu(dlid) >=
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be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
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(be32_to_cpu(slid) >=
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be16_to_cpu(IB_MULTICAST_LID_BASE)))
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return true;
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return false;
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}
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/* Get multicast lid base */
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static inline u32 opa_get_mcast_base(u32 nr_top_bits)
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{
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return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
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}
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/* Check for a valid unicast LID for non-SM traffic types */
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static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr)
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{
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if (attr->type == RDMA_AH_ATTR_TYPE_IB) {
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if (!rdma_ah_get_dlid(attr) ||
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rdma_ah_get_dlid(attr) >=
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be16_to_cpu(IB_MULTICAST_LID_BASE))
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return false;
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} else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) {
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if (!rdma_ah_get_dlid(attr) ||
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rdma_ah_get_dlid(attr) >=
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opa_get_mcast_base(OPA_MCAST_NR))
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return false;
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}
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return true;
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}
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#endif /* OPA_ADDR_H */
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