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When address handle attributes are initialized, the LIDs are transformed to be in the 32 bit LID space. When constructing the header, hfi1 driver will look at the LID to determine the packet header to be created. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
116 lines
3.9 KiB
C
116 lines
3.9 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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/**
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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(u32 dlid, u32 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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else
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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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#endif /* OPA_ADDR_H */
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