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freebsd-dev/sys/dev/ath/ath_rate/sample/tx_schedules.h
Adrian Chadd b4967c9b6f [ath_rate_sample] Have the final attempted rate in 11n modes to be the lowest one. 
Right now ath_rate_sample has a fixed rate schedule, rather than the minstrel_ht
style "best, good, most reliable" triplet.  So, if higher rates are tried then
it'll not fail back to a lower MCS rate in that transmission schedule.

This means that in low SNR situations it'll not easily drop to MCS0 unless enough
transmissions occur to allow rate control to eventually decide to drop; and if
it's TCP traffic it'll get slowed down because of packet loss.

It's worse for 2-stream and 3-stream rates; it doesn't ever fall back to lower
stream rates, and these higher stream rates required higher SNR to work.

So instead let's (for now?) have each of the 11n transmit rates use MCS0 as
the last attempt. ath_rate_sample will quickly see that rate succeeds more
and will move to it much quicker.

Testing:

* AR9344 (Wasp) - 2G STA mode
2019-05-05 06:32:40 +00:00

242 lines
11 KiB
C
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2005 John Bicket
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGES.
*
*/
#ifndef __ATH_RATE_SAMPLE_TXSCHEDULES_H__
#define __ATH_RATE_SAMPLE_TXSCHEDULES_H__
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#define A(_r) \
(((_r) == 6) ? 0 : (((_r) == 9) ? 1 : (((_r) == 12) ? 2 : \
(((_r) == 18) ? 3 : (((_r) == 24) ? 4 : (((_r) == 36) ? 5 : \
(((_r) == 48) ? 6 : (((_r) == 54) ? 7 : 0))))))))
static const struct txschedule series_11a[] = {
{ 3,A( 6), 3,A( 6), 0,A( 6), 0,A( 6) }, /* 6Mb/s */
{ 4,A( 9), 3,A( 6), 4,A( 6), 0,A( 6) }, /* 9Mb/s */
{ 4,A(12), 3,A( 6), 4,A( 6), 0,A( 6) }, /* 12Mb/s */
{ 4,A(18), 3,A( 12), 4,A( 6), 2,A( 6) }, /* 18Mb/s */
{ 4,A(24), 3,A( 18), 4,A( 12), 2,A( 6) }, /* 24Mb/s */
{ 4,A(36), 3,A( 24), 4,A( 18), 2,A( 6) }, /* 36Mb/s */
{ 4,A(48), 3,A( 36), 4,A( 24), 2,A(12) }, /* 48Mb/s */
{ 4,A(54), 3,A( 48), 4,A( 36), 2,A(24) } /* 54Mb/s */
};
#define NA1(_r) \
(((_r) == 6.5) ? 8 : (((_r) == 13) ? 9 : (((_r) == 19.5)? 10 : \
(((_r) == 26) ? 11 : (((_r) == 39) ? 12 : (((_r) == 52) ? 13 : \
(((_r) == 58.5)? 14 : (((_r) == 65) ? 15 : 0))))))))
#define NA2(_r) \
(((_r) == 13) ? 16 : (((_r) == 26) ? 17 : (((_r) == 39) ? 18 : \
(((_r) == 52) ? 19 : (((_r) == 78) ? 20 : (((_r) == 104)? 21 : \
(((_r) == 117)? 22 : (((_r) == 130)? 23 : 0))))))))
#define NA3(_r) \
(((_r) == 19.5) ? 24 : (((_r) == 39) ? 25 : (((_r) == 58.5) ? 26 : \
(((_r) == 78) ? 27 : (((_r) == 117) ? 28 : (((_r) == 156) ? 29 : \
(((_r) == 175.5) ? 30 : (((_r) == 195)? 31 : 0))))))))
static const struct txschedule series_11na[] = {
{ 3,A( 6), 3,A( 6), 0,A( 6), 0,A( 6) }, /* 6Mb/s */
{ 4,A( 9), 3,A( 6), 4,A( 6), 0,A( 6) }, /* 9Mb/s */
{ 4,A(12), 3,A( 6), 4,A( 6), 0,A( 6) }, /* 12Mb/s */
{ 4,A(18), 3,A( 12), 4,A( 6), 2,A( 6) }, /* 18Mb/s */
{ 4,A(24), 3,A( 18), 4,A( 12), 2,A( 6) }, /* 24Mb/s */
{ 4,A(36), 3,A( 24), 4,A( 18), 2,A( 6) }, /* 36Mb/s */
{ 4,A(48), 3,A( 36), 4,A( 24), 2,A(12) }, /* 48Mb/s */
{ 4,A(54), 3,A( 48), 4,A( 36), 2,A(24) }, /* 54Mb/s */
/* 1 stream rates */
{ 3,NA1( 6.5), 3,NA1( 6.5), 0,NA1( 6.5), 0,NA1(6.5) }, /* 6.5Mb/s */
{ 4,NA1( 13), 3,NA1( 6.5), 4,NA1( 6.5), 0,NA1(6.5) }, /* 13Mb/s */
{ 4,NA1(19.5), 3,NA1( 6.5), 4,NA1( 6.5), 0,NA1(6.5) }, /*19.5Mb/s */
{ 4,NA1( 26), 3,NA1(19.5), 4,NA1( 6.5), 2,NA1(6.5) }, /* 26Mb/s */
{ 4,NA1( 39), 3,NA1( 26), 4,NA1(19.5), 2,NA1(6.5) }, /* 39Mb/s */
{ 4,NA1( 52), 3,NA1( 39), 4,NA1( 26), 2,NA1(6.5) }, /* 52Mb/s */
{ 4,NA1(58.5), 3,NA1( 52), 4,NA1( 39), 2,NA1( 13) }, /*58.5Mb/s */
{ 4,NA1( 65), 3,NA1(58.5), 4,NA1( 52), 2,NA1( 13) }, /* 65Mb/s */
/* 2 stream rates */
{ 3,NA2( 13), 3,NA2( 13), 0,NA2( 13), 0,NA2( 13) }, /* 13Mb/s */
{ 4,NA2( 26), 3,NA2( 13), 4,NA2( 13), 0,NA2( 13) }, /* 26Mb/s */
{ 4,NA2( 39), 3,NA2( 26), 4,NA2( 13), 2,NA2( 13) }, /* 39Mb/s */
{ 4,NA2( 52), 3,NA2( 39), 4,NA2( 26), 2,NA2( 13) }, /* 52Mb/s */
{ 4,NA2( 78), 3,NA2( 52), 4,NA2( 39), 2,NA2( 13) }, /* 78Mb/s */
{ 4,NA2( 104), 3,NA2( 78), 4,NA2( 52), 2,NA2( 13) }, /* 104Mb/s */
{ 4,NA2( 117), 3,NA2( 104), 4,NA2( 78), 2,NA2( 26) }, /* 117Mb/s */
{ 4,NA2( 130), 3,NA2( 117), 4,NA2( 104), 2,NA2( 26) }, /* 130Mb/s */
/* 3 stream rates */
{ 3,NA3(19.5), 3,NA3(19.5), 0,NA3(19.5), 0,NA3(19.5) }, /* 19Mb/s */
{ 3,NA3( 39), 3,NA3(19.5), 0,NA3(19.5), 0,NA3(19.5) }, /* 39Mb/s */
{ 3,NA3(58.5), 3,NA3( 39), 0,NA3(19.5), 0,NA3(19.5) }, /* 58Mb/s */
{ 3,NA3( 78), 3,NA3(58.5), 0,NA3( 39), 0,NA3(19.5) }, /* 78Mb/s */
{ 3,NA3( 117), 3,NA3( 78), 0,NA3(58.5), 0,NA3(19.5) }, /* 117Mb/s */
{ 3,NA3( 156), 3,NA3( 117), 0,NA3( 78), 0,NA3(19.5) }, /* 156Mb/s */
{ 3,NA3(175.5), 3,NA3( 156), 0,NA3( 117), 0,NA3( 39) }, /* 175Mb/s */
{ 3,NA3( 195), 3,NA3( 195), 0,NA3( 156), 0,NA3(58.5) }, /* 195Mb/s */
};
#undef A
#undef NA3
#undef NA2
#undef NA1
#define G(_r) \
(((_r) == 1) ? 0 : (((_r) == 2) ? 1 : (((_r) == 5.5) ? 2 : \
(((_r) == 11) ? 3 : (((_r) == 6) ? 4 : (((_r) == 9) ? 5 : \
(((_r) == 12) ? 6 : (((_r) == 18) ? 7 : (((_r) == 24) ? 8 : \
(((_r) == 36) ? 9 : (((_r) == 48) ? 10 : (((_r) == 54) ? 11 : 0))))))))))))
static const struct txschedule series_11g[] = {
{ 3,G( 1), 3,G( 1), 0,G( 1), 0,G( 1) }, /* 1Mb/s */
{ 4,G( 2), 3,G( 1), 4,G( 1), 0,G( 1) }, /* 2Mb/s */
{ 4,G(5.5),3,G( 2), 4,G( 1), 2,G( 1) }, /* 5.5Mb/s */
{ 4,G(11), 3,G(5.5), 4,G( 2), 2,G( 1) }, /* 11Mb/s */
{ 4,G( 6), 3,G(5.5), 4,G( 2), 2,G( 1) }, /* 6Mb/s */
{ 4,G( 9), 3,G( 6), 4,G(5.5), 2,G( 1) }, /* 9Mb/s */
{ 4,G(12), 3,G( 11), 4,G(5.5), 2,G( 1) }, /* 12Mb/s */
{ 4,G(18), 3,G( 12), 4,G( 11), 2,G( 1) }, /* 18Mb/s */
{ 4,G(24), 3,G( 18), 4,G( 12), 2,G( 1) }, /* 24Mb/s */
{ 4,G(36), 3,G( 24), 4,G( 18), 2,G( 1) }, /* 36Mb/s */
{ 4,G(48), 3,G( 36), 4,G( 24), 2,G( 1) }, /* 48Mb/s */
{ 4,G(54), 3,G( 48), 4,G( 36), 2,G( 1) } /* 54Mb/s */
};
#define NG1(_r) \
(((_r) == 6.5) ? 12 : (((_r) == 13) ? 13 : (((_r) == 19.5)? 14 : \
(((_r) == 26) ? 15 : (((_r) == 39) ? 16 : (((_r) == 52) ? 17 : \
(((_r) == 58.5)? 18 : (((_r) == 65) ? 19 : 0))))))))
#define NG2(_r) \
(((_r) == 13) ? 20 : (((_r) == 26) ? 21 : (((_r) == 39) ? 22 : \
(((_r) == 52) ? 23 : (((_r) == 78) ? 24 : (((_r) == 104) ? 25 : \
(((_r) == 117) ? 26 : (((_r) == 130)? 27 : 0))))))))
#define NG3(_r) \
(((_r) == 19.5) ? 28 : (((_r) == 39) ? 29 : (((_r) == 58.5) ? 30 : \
(((_r) == 78) ? 31 : (((_r) == 117) ? 32 : (((_r) == 156) ? 33 : \
(((_r) == 175.5) ? 34 : (((_r) == 195)? 35 : 0))))))))
static const struct txschedule series_11ng[] = {
{ 3,G( 1), 3,G( 1), 0,G( 1), 0,G( 1) }, /* 1Mb/s */
{ 4,G( 2), 3,G( 1), 4,G( 1), 0,G( 1) }, /* 2Mb/s */
{ 4,G(5.5),3,G( 2), 4,G( 1), 2,G( 1) }, /* 5.5Mb/s */
{ 4,G(11), 3,G(5.5), 4,G( 2), 2,G( 1) }, /* 11Mb/s */
{ 4,G( 6), 3,G(5.5), 4,G( 2), 2,G( 1) }, /* 6Mb/s */
{ 4,G( 9), 3,G( 6), 4,G(5.5), 2,G( 1) }, /* 9Mb/s */
{ 4,G(12), 3,G( 11), 4,G(5.5), 2,G( 1) }, /* 12Mb/s */
{ 4,G(18), 3,G( 12), 4,G( 11), 2,G( 1) }, /* 18Mb/s */
{ 4,G(24), 3,G( 18), 4,G( 12), 2,G( 1) }, /* 24Mb/s */
{ 4,G(36), 3,G( 24), 4,G( 18), 2,G( 1) }, /* 36Mb/s */
{ 4,G(48), 3,G( 36), 4,G( 24), 2,G( 1) }, /* 48Mb/s */
{ 4,G(54), 3,G( 48), 4,G( 36), 2,G( 1) }, /* 54Mb/s */
/* 1 stream rates */
{ 3,NG1( 6.5), 3,NG1( 6.5), 0,NG1( 6.5), 0,NG1(6.5) }, /* 6.5Mb/s */
{ 4,NG1( 13), 3,NG1( 6.5), 4,NG1( 6.5), 0,NG1(6.5) }, /* 13Mb/s */
{ 4,NG1(19.5), 3,NG1( 6.5), 4,NG1( 6.5), 0,NG1(6.5) }, /*19.5Mb/s */
{ 4,NG1( 26), 3,NG1(19.5), 4,NG1( 6.5), 2,NG1(6.5) }, /* 26Mb/s */
{ 4,NG1( 39), 3,NG1( 26), 4,NG1(19.5), 2,NG1(6.5) }, /* 39Mb/s */
{ 4,NG1( 52), 3,NG1( 39), 4,NG1( 26), 2,NG1(6.5) }, /* 52Mb/s */
{ 4,NG1(58.5), 3,NG1( 52), 4,NG1( 39), 2,NG1(6.5) }, /*58.5Mb/s */
{ 4,NG1( 65), 3,NG1(58.5), 4,NG1( 52), 2,NG1(6.5) }, /* 65Mb/s */
/* 2 stream rates */
{ 3,NG2( 13), 3,NG1(6.5), 0,NG2( 13), 0,NG2( 13) }, /* 13Mb/s */
{ 4,NG2( 26), 3,NG2( 13), 4,NG1(6.5), 0,NG2( 13) }, /* 26Mb/s */
{ 4,NG2( 39), 3,NG2( 26), 4,NG2( 13), 2,NG1(6.5) }, /* 39Mb/s */
{ 4,NG2( 52), 3,NG2( 39), 4,NG2( 26), 2,NG1(6.5) }, /* 52Mb/s */
{ 4,NG2( 78), 3,NG2( 52), 4,NG2( 39), 2,NG1(6.5) }, /* 78Mb/s */
{ 4,NG2( 104), 3,NG2( 78), 4,NG2( 52), 2,NG1(6.5) }, /* 104Mb/s */
{ 4,NG2( 117), 3,NG2( 104), 4,NG2( 78), 2,NG1(6.5) }, /* 117Mb/s */
{ 4,NG2( 130), 3,NG2( 117), 4,NG2( 104), 2,NG1(6.5) }, /* 130Mb/s */
/* 3 stream rates */
{ 3,NG3(19.5), 3,NG1(6.5), 0,NG3(19.5), 0,NG3(19.5) }, /* 19Mb/s */
{ 3,NG3( 39), 3,NG3(19.5), 4,NG1(6.5), 0,NG3(19.5) }, /* 39Mb/s */
{ 3,NG3(58.5), 3,NG3( 39), 4,NG1(6.5), 0,NG3(19.5) }, /* 58Mb/s */
{ 3,NG3( 78), 3,NG3(58.5), 4,NG1(6.5), 0,NG3(19.5) }, /* 78Mb/s */
{ 3,NG3( 117), 3,NG3( 78), 4,NG1(6.5), 0,NG3(19.5) }, /* 117Mb/s */
{ 3,NG3( 156), 3,NG3( 117), 4,NG1(6.5), 0,NG3(19.5) }, /* 156Mb/s */
{ 3,NG3(175.5), 3,NG3( 156), 4,NG1(6.5), 0,NG3( 39) }, /* 175Mb/s */
{ 3,NG3( 195), 3,NG3( 195), 4,NG1(6.5), 0,NG3(58.5) }, /* 195Mb/s */
};
#undef G
#undef NG3
#undef NG2
#undef NG1
#define H(_r) \
(((_r) == 3) ? 0 : (((_r) == 4.5) ? 1 : (((_r) == 6) ? 2 : \
(((_r) == 9) ? 3 : (((_r) == 12) ? 4 : (((_r) == 18) ? 5 : \
(((_r) == 24) ? 6 : (((_r) == 27) ? 7 : 0))))))))
static const struct txschedule series_half[] = {
{ 3,H( 3), 3,H( 3), 0,H( 3), 0,H( 3) }, /* 3Mb/s */
{ 4,H(4.5),3,H( 3), 4,H( 3), 0,H( 3) }, /* 4.5Mb/s */
{ 4,H( 6), 3,H( 3), 4,H( 3), 0,H( 3) }, /* 6Mb/s */
{ 4,H( 9), 3,H( 6), 4,H( 3), 2,H( 3) }, /* 9Mb/s */
{ 4,H(12), 3,H( 9), 4,H( 6), 2,H( 3) }, /* 12Mb/s */
{ 4,H(18), 3,H( 12), 4,H( 9), 2,H( 3) }, /* 18Mb/s */
{ 4,H(24), 3,H( 18), 4,H( 12), 2,H( 6) }, /* 24Mb/s */
{ 4,H(27), 3,H( 24), 4,H( 18), 2,H(12) } /* 27Mb/s */
};
#undef H
#ifdef Q
#undef Q
#endif
#define Q(_r) \
(((_r) == 1.5) ? 0 : (((_r) ==2.25) ? 1 : (((_r) == 3) ? 2 : \
(((_r) == 4.5) ? 3 : (((_r) == 6) ? 4 : (((_r) == 9) ? 5 : \
(((_r) == 12) ? 6 : (((_r) == 13.5)? 7 : 0))))))))
static const struct txschedule series_quarter[] = {
{ 3,Q( 1.5),3,Q(1.5), 0,Q(1.5), 0,Q(1.5) }, /* 1.5Mb/s */
{ 4,Q(2.25),3,Q(1.5), 4,Q(1.5), 0,Q(1.5) }, /*2.25Mb/s */
{ 4,Q( 3),3,Q(1.5), 4,Q(1.5), 0,Q(1.5) }, /* 3Mb/s */
{ 4,Q( 4.5),3,Q( 3), 4,Q(1.5), 2,Q(1.5) }, /* 4.5Mb/s */
{ 4,Q( 6),3,Q(4.5), 4,Q( 3), 2,Q(1.5) }, /* 6Mb/s */
{ 4,Q( 9),3,Q( 6), 4,Q(4.5), 2,Q(1.5) }, /* 9Mb/s */
{ 4,Q( 12),3,Q( 9), 4,Q( 6), 2,Q( 3) }, /* 12Mb/s */
{ 4,Q(13.5),3,Q( 12), 4,Q( 9), 2,Q( 6) } /*13.5Mb/s */
};
#undef Q
#endif
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