718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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* All rights reserved.
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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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* 1. 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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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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 NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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*/
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#ifndef __IF_ATH_TSF_H__
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#define __IF_ATH_TSF_H__
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/*
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* Extend 15-bit time stamp from rx descriptor to
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* a full 64-bit TSF using the specified TSF.
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*/
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static __inline u_int64_t
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ath_extend_tsf15(u_int32_t rstamp, u_int64_t tsf)
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{
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if ((tsf & 0x7fff) < rstamp)
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tsf -= 0x8000;
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return ((tsf &~ 0x7fff) | rstamp);
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}
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/*
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* Extend 32-bit time stamp from rx descriptor to
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* a full 64-bit TSF using the specified TSF.
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*/
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static __inline u_int64_t
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ath_extend_tsf32(u_int32_t rstamp, u_int64_t tsf)
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{
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u_int32_t tsf_low = tsf & 0xffffffff;
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u_int64_t tsf64 = (tsf & ~0xffffffffULL) | rstamp;
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if (rstamp > tsf_low && (rstamp - tsf_low > 0x10000000))
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tsf64 -= 0x100000000ULL;
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if (rstamp < tsf_low && (tsf_low - rstamp > 0x10000000))
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tsf64 += 0x100000000ULL;
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return tsf64;
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}
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/*
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* Extend the TSF from the RX descriptor to a full 64 bit TSF.
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* Earlier hardware versions only wrote the low 15 bits of the
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* TSF into the RX descriptor; later versions (AR5416 and up)
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* include the 32 bit TSF value.
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*/
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static __inline u_int64_t
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ath_extend_tsf(struct ath_softc *sc, u_int32_t rstamp, u_int64_t tsf)
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{
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if (sc->sc_rxtsf32)
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return ath_extend_tsf32(rstamp, tsf);
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else
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return ath_extend_tsf15(rstamp, tsf);
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}
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#endif
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