forked from Minki/linux
1f38b8c564
The unit of the return value of ieee80211_get_rate_duration is nanoseconds, not
microseconds. Adjust the duration checks to account for that.
For higher data rates, allow larger estimated aggregation sizes, and add some
values for HE as well, which can use much larger aggregates.
Since small packets with high data rates can now lead to duration values too
small for info->tx_time_est, return a minimum of 4us.
Fixes: f01cfbaf9b ("mac80211: improve AQL aggregation estimation for low data rates")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20200915085945.3782-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
710 lines
19 KiB
C
710 lines
19 KiB
C
// SPDX-License-Identifier: ISC
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/*
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* Copyright (C) 2019 Felix Fietkau <nbd@nbd.name>
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*/
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "sta_info.h"
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#define AVG_PKT_SIZE 1024
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/* Number of bits for an average sized packet */
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#define MCS_NBITS (AVG_PKT_SIZE << 3)
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/* Number of kilo-symbols (symbols * 1024) for a packet with (bps) bits per
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* symbol. We use k-symbols to avoid rounding in the _TIME macros below.
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*/
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#define MCS_N_KSYMS(bps) DIV_ROUND_UP(MCS_NBITS << 10, (bps))
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/* Transmission time (in 1024 * usec) for a packet containing (ksyms) * 1024
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* symbols.
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*/
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#define MCS_SYMBOL_TIME(sgi, ksyms) \
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(sgi ? \
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((ksyms) * 4 * 18) / 20 : /* 3.6 us per sym */ \
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((ksyms) * 4) /* 4.0 us per sym */ \
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)
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/* Transmit duration for the raw data part of an average sized packet */
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#define MCS_DURATION(streams, sgi, bps) \
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((u32)MCS_SYMBOL_TIME(sgi, MCS_N_KSYMS((streams) * (bps))))
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#define MCS_DURATION_S(shift, streams, sgi, bps) \
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((u16)((MCS_DURATION(streams, sgi, bps) >> shift)))
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/* These should match the values in enum nl80211_he_gi */
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#define HE_GI_08 0
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#define HE_GI_16 1
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#define HE_GI_32 2
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/* Transmission time (1024 usec) for a packet containing (ksyms) * k-symbols */
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#define HE_SYMBOL_TIME(gi, ksyms) \
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(gi == HE_GI_08 ? \
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((ksyms) * 16 * 17) / 20 : /* 13.6 us per sym */ \
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(gi == HE_GI_16 ? \
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((ksyms) * 16 * 18) / 20 : /* 14.4 us per sym */ \
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((ksyms) * 16) /* 16.0 us per sym */ \
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))
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/* Transmit duration for the raw data part of an average sized packet */
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#define HE_DURATION(streams, gi, bps) \
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((u32)HE_SYMBOL_TIME(gi, MCS_N_KSYMS((streams) * (bps))))
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#define HE_DURATION_S(shift, streams, gi, bps) \
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(HE_DURATION(streams, gi, bps) >> shift)
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#define BW_20 0
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#define BW_40 1
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#define BW_80 2
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#define BW_160 3
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/*
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* Define group sort order: HT40 -> SGI -> #streams
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*/
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#define IEEE80211_MAX_STREAMS 4
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#define IEEE80211_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */
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#define IEEE80211_VHT_STREAM_GROUPS 8 /* BW(=4) * SGI(=2) */
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#define IEEE80211_HE_MAX_STREAMS 8
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#define IEEE80211_HE_STREAM_GROUPS 12 /* BW(=4) * GI(=3) */
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#define IEEE80211_HT_GROUPS_NB (IEEE80211_MAX_STREAMS * \
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IEEE80211_HT_STREAM_GROUPS)
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#define IEEE80211_VHT_GROUPS_NB (IEEE80211_MAX_STREAMS * \
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IEEE80211_VHT_STREAM_GROUPS)
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#define IEEE80211_HE_GROUPS_NB (IEEE80211_HE_MAX_STREAMS * \
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IEEE80211_HE_STREAM_GROUPS)
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#define IEEE80211_GROUPS_NB (IEEE80211_HT_GROUPS_NB + \
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IEEE80211_VHT_GROUPS_NB + \
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IEEE80211_HE_GROUPS_NB)
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#define IEEE80211_HT_GROUP_0 0
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#define IEEE80211_VHT_GROUP_0 (IEEE80211_HT_GROUP_0 + IEEE80211_HT_GROUPS_NB)
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#define IEEE80211_HE_GROUP_0 (IEEE80211_VHT_GROUP_0 + IEEE80211_VHT_GROUPS_NB)
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#define MCS_GROUP_RATES 12
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#define HT_GROUP_IDX(_streams, _sgi, _ht40) \
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IEEE80211_HT_GROUP_0 + \
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IEEE80211_MAX_STREAMS * 2 * _ht40 + \
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IEEE80211_MAX_STREAMS * _sgi + \
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_streams - 1
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#define _MAX(a, b) (((a)>(b))?(a):(b))
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#define GROUP_SHIFT(duration) \
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_MAX(0, 16 - __builtin_clz(duration))
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/* MCS rate information for an MCS group */
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#define __MCS_GROUP(_streams, _sgi, _ht40, _s) \
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[HT_GROUP_IDX(_streams, _sgi, _ht40)] = { \
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.shift = _s, \
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.duration = { \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 54 : 26), \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 108 : 52), \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 162 : 78), \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 216 : 104), \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 324 : 156), \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 432 : 208), \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 486 : 234), \
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MCS_DURATION_S(_s, _streams, _sgi, _ht40 ? 540 : 260) \
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} \
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}
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#define MCS_GROUP_SHIFT(_streams, _sgi, _ht40) \
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GROUP_SHIFT(MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26))
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#define MCS_GROUP(_streams, _sgi, _ht40) \
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__MCS_GROUP(_streams, _sgi, _ht40, \
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MCS_GROUP_SHIFT(_streams, _sgi, _ht40))
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#define VHT_GROUP_IDX(_streams, _sgi, _bw) \
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(IEEE80211_VHT_GROUP_0 + \
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IEEE80211_MAX_STREAMS * 2 * (_bw) + \
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IEEE80211_MAX_STREAMS * (_sgi) + \
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(_streams) - 1)
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#define BW2VBPS(_bw, r4, r3, r2, r1) \
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(_bw == BW_160 ? r4 : _bw == BW_80 ? r3 : _bw == BW_40 ? r2 : r1)
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#define __VHT_GROUP(_streams, _sgi, _bw, _s) \
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[VHT_GROUP_IDX(_streams, _sgi, _bw)] = { \
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.shift = _s, \
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.duration = { \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 234, 117, 54, 26)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 468, 234, 108, 52)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 702, 351, 162, 78)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 936, 468, 216, 104)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 1404, 702, 324, 156)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 1872, 936, 432, 208)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 2106, 1053, 486, 234)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 2340, 1170, 540, 260)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 2808, 1404, 648, 312)), \
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MCS_DURATION_S(_s, _streams, _sgi, \
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BW2VBPS(_bw, 3120, 1560, 720, 346)) \
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} \
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}
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#define VHT_GROUP_SHIFT(_streams, _sgi, _bw) \
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GROUP_SHIFT(MCS_DURATION(_streams, _sgi, \
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BW2VBPS(_bw, 243, 117, 54, 26)))
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#define VHT_GROUP(_streams, _sgi, _bw) \
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__VHT_GROUP(_streams, _sgi, _bw, \
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VHT_GROUP_SHIFT(_streams, _sgi, _bw))
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#define HE_GROUP_IDX(_streams, _gi, _bw) \
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(IEEE80211_HE_GROUP_0 + \
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IEEE80211_HE_MAX_STREAMS * 3 * (_bw) + \
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IEEE80211_HE_MAX_STREAMS * (_gi) + \
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(_streams) - 1)
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#define __HE_GROUP(_streams, _gi, _bw, _s) \
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[HE_GROUP_IDX(_streams, _gi, _bw)] = { \
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.shift = _s, \
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.duration = { \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 979, 489, 230, 115)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 1958, 979, 475, 230)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 2937, 1468, 705, 345)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 3916, 1958, 936, 475)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 5875, 2937, 1411, 705)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 7833, 3916, 1872, 936)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 8827, 4406, 2102, 1051)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 9806, 4896, 2347, 1166)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 11764, 5875, 2808, 1411)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 13060, 6523, 3124, 1555)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 14702, 7344, 3513, 1756)), \
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HE_DURATION_S(_s, _streams, _gi, \
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BW2VBPS(_bw, 16329, 8164, 3902, 1944)) \
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} \
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}
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#define HE_GROUP_SHIFT(_streams, _gi, _bw) \
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GROUP_SHIFT(HE_DURATION(_streams, _gi, \
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BW2VBPS(_bw, 979, 489, 230, 115)))
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#define HE_GROUP(_streams, _gi, _bw) \
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__HE_GROUP(_streams, _gi, _bw, \
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HE_GROUP_SHIFT(_streams, _gi, _bw))
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struct mcs_group {
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u8 shift;
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u16 duration[MCS_GROUP_RATES];
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};
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static const struct mcs_group airtime_mcs_groups[] = {
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MCS_GROUP(1, 0, BW_20),
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MCS_GROUP(2, 0, BW_20),
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MCS_GROUP(3, 0, BW_20),
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MCS_GROUP(4, 0, BW_20),
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MCS_GROUP(1, 1, BW_20),
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MCS_GROUP(2, 1, BW_20),
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MCS_GROUP(3, 1, BW_20),
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MCS_GROUP(4, 1, BW_20),
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MCS_GROUP(1, 0, BW_40),
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MCS_GROUP(2, 0, BW_40),
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MCS_GROUP(3, 0, BW_40),
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MCS_GROUP(4, 0, BW_40),
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MCS_GROUP(1, 1, BW_40),
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MCS_GROUP(2, 1, BW_40),
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MCS_GROUP(3, 1, BW_40),
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MCS_GROUP(4, 1, BW_40),
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VHT_GROUP(1, 0, BW_20),
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VHT_GROUP(2, 0, BW_20),
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VHT_GROUP(3, 0, BW_20),
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VHT_GROUP(4, 0, BW_20),
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VHT_GROUP(1, 1, BW_20),
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VHT_GROUP(2, 1, BW_20),
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VHT_GROUP(3, 1, BW_20),
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VHT_GROUP(4, 1, BW_20),
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VHT_GROUP(1, 0, BW_40),
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VHT_GROUP(2, 0, BW_40),
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VHT_GROUP(3, 0, BW_40),
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VHT_GROUP(4, 0, BW_40),
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VHT_GROUP(1, 1, BW_40),
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VHT_GROUP(2, 1, BW_40),
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VHT_GROUP(3, 1, BW_40),
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VHT_GROUP(4, 1, BW_40),
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VHT_GROUP(1, 0, BW_80),
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VHT_GROUP(2, 0, BW_80),
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VHT_GROUP(3, 0, BW_80),
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VHT_GROUP(4, 0, BW_80),
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VHT_GROUP(1, 1, BW_80),
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VHT_GROUP(2, 1, BW_80),
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VHT_GROUP(3, 1, BW_80),
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VHT_GROUP(4, 1, BW_80),
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VHT_GROUP(1, 0, BW_160),
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VHT_GROUP(2, 0, BW_160),
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VHT_GROUP(3, 0, BW_160),
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VHT_GROUP(4, 0, BW_160),
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VHT_GROUP(1, 1, BW_160),
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VHT_GROUP(2, 1, BW_160),
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VHT_GROUP(3, 1, BW_160),
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VHT_GROUP(4, 1, BW_160),
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HE_GROUP(1, HE_GI_08, BW_20),
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HE_GROUP(2, HE_GI_08, BW_20),
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HE_GROUP(3, HE_GI_08, BW_20),
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HE_GROUP(4, HE_GI_08, BW_20),
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HE_GROUP(5, HE_GI_08, BW_20),
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HE_GROUP(6, HE_GI_08, BW_20),
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HE_GROUP(7, HE_GI_08, BW_20),
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HE_GROUP(8, HE_GI_08, BW_20),
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HE_GROUP(1, HE_GI_16, BW_20),
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HE_GROUP(2, HE_GI_16, BW_20),
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HE_GROUP(3, HE_GI_16, BW_20),
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HE_GROUP(4, HE_GI_16, BW_20),
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HE_GROUP(5, HE_GI_16, BW_20),
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HE_GROUP(6, HE_GI_16, BW_20),
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HE_GROUP(7, HE_GI_16, BW_20),
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HE_GROUP(8, HE_GI_16, BW_20),
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HE_GROUP(1, HE_GI_32, BW_20),
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HE_GROUP(2, HE_GI_32, BW_20),
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HE_GROUP(3, HE_GI_32, BW_20),
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HE_GROUP(4, HE_GI_32, BW_20),
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HE_GROUP(5, HE_GI_32, BW_20),
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HE_GROUP(6, HE_GI_32, BW_20),
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HE_GROUP(7, HE_GI_32, BW_20),
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HE_GROUP(8, HE_GI_32, BW_20),
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HE_GROUP(1, HE_GI_08, BW_40),
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HE_GROUP(2, HE_GI_08, BW_40),
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HE_GROUP(3, HE_GI_08, BW_40),
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HE_GROUP(4, HE_GI_08, BW_40),
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HE_GROUP(5, HE_GI_08, BW_40),
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HE_GROUP(6, HE_GI_08, BW_40),
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HE_GROUP(7, HE_GI_08, BW_40),
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HE_GROUP(8, HE_GI_08, BW_40),
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HE_GROUP(1, HE_GI_16, BW_40),
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HE_GROUP(2, HE_GI_16, BW_40),
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HE_GROUP(3, HE_GI_16, BW_40),
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HE_GROUP(4, HE_GI_16, BW_40),
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HE_GROUP(5, HE_GI_16, BW_40),
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HE_GROUP(6, HE_GI_16, BW_40),
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HE_GROUP(7, HE_GI_16, BW_40),
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HE_GROUP(8, HE_GI_16, BW_40),
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HE_GROUP(1, HE_GI_32, BW_40),
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HE_GROUP(2, HE_GI_32, BW_40),
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HE_GROUP(3, HE_GI_32, BW_40),
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HE_GROUP(4, HE_GI_32, BW_40),
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HE_GROUP(5, HE_GI_32, BW_40),
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HE_GROUP(6, HE_GI_32, BW_40),
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HE_GROUP(7, HE_GI_32, BW_40),
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HE_GROUP(8, HE_GI_32, BW_40),
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HE_GROUP(1, HE_GI_08, BW_80),
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HE_GROUP(2, HE_GI_08, BW_80),
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HE_GROUP(3, HE_GI_08, BW_80),
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HE_GROUP(4, HE_GI_08, BW_80),
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HE_GROUP(5, HE_GI_08, BW_80),
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HE_GROUP(6, HE_GI_08, BW_80),
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HE_GROUP(7, HE_GI_08, BW_80),
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HE_GROUP(8, HE_GI_08, BW_80),
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HE_GROUP(1, HE_GI_16, BW_80),
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HE_GROUP(2, HE_GI_16, BW_80),
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HE_GROUP(3, HE_GI_16, BW_80),
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HE_GROUP(4, HE_GI_16, BW_80),
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HE_GROUP(5, HE_GI_16, BW_80),
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HE_GROUP(6, HE_GI_16, BW_80),
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HE_GROUP(7, HE_GI_16, BW_80),
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HE_GROUP(8, HE_GI_16, BW_80),
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HE_GROUP(1, HE_GI_32, BW_80),
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HE_GROUP(2, HE_GI_32, BW_80),
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HE_GROUP(3, HE_GI_32, BW_80),
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HE_GROUP(4, HE_GI_32, BW_80),
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HE_GROUP(5, HE_GI_32, BW_80),
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HE_GROUP(6, HE_GI_32, BW_80),
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HE_GROUP(7, HE_GI_32, BW_80),
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HE_GROUP(8, HE_GI_32, BW_80),
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HE_GROUP(1, HE_GI_08, BW_160),
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HE_GROUP(2, HE_GI_08, BW_160),
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HE_GROUP(3, HE_GI_08, BW_160),
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HE_GROUP(4, HE_GI_08, BW_160),
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HE_GROUP(5, HE_GI_08, BW_160),
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HE_GROUP(6, HE_GI_08, BW_160),
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HE_GROUP(7, HE_GI_08, BW_160),
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HE_GROUP(8, HE_GI_08, BW_160),
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HE_GROUP(1, HE_GI_16, BW_160),
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HE_GROUP(2, HE_GI_16, BW_160),
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HE_GROUP(3, HE_GI_16, BW_160),
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HE_GROUP(4, HE_GI_16, BW_160),
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HE_GROUP(5, HE_GI_16, BW_160),
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HE_GROUP(6, HE_GI_16, BW_160),
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HE_GROUP(7, HE_GI_16, BW_160),
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HE_GROUP(8, HE_GI_16, BW_160),
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HE_GROUP(1, HE_GI_32, BW_160),
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HE_GROUP(2, HE_GI_32, BW_160),
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HE_GROUP(3, HE_GI_32, BW_160),
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HE_GROUP(4, HE_GI_32, BW_160),
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HE_GROUP(5, HE_GI_32, BW_160),
|
|
HE_GROUP(6, HE_GI_32, BW_160),
|
|
HE_GROUP(7, HE_GI_32, BW_160),
|
|
HE_GROUP(8, HE_GI_32, BW_160),
|
|
};
|
|
|
|
static u32
|
|
ieee80211_calc_legacy_rate_duration(u16 bitrate, bool short_pre,
|
|
bool cck, int len)
|
|
{
|
|
u32 duration;
|
|
|
|
if (cck) {
|
|
duration = 144 + 48; /* preamble + PLCP */
|
|
if (short_pre)
|
|
duration >>= 1;
|
|
|
|
duration += 10; /* SIFS */
|
|
} else {
|
|
duration = 20 + 16; /* premable + SIFS */
|
|
}
|
|
|
|
len <<= 3;
|
|
duration += (len * 10) / bitrate;
|
|
|
|
return duration;
|
|
}
|
|
|
|
static u32 ieee80211_get_rate_duration(struct ieee80211_hw *hw,
|
|
struct ieee80211_rx_status *status,
|
|
u32 *overhead)
|
|
{
|
|
bool sgi = status->enc_flags & RX_ENC_FLAG_SHORT_GI;
|
|
int bw, streams;
|
|
int group, idx;
|
|
u32 duration;
|
|
|
|
switch (status->bw) {
|
|
case RATE_INFO_BW_20:
|
|
bw = BW_20;
|
|
break;
|
|
case RATE_INFO_BW_40:
|
|
bw = BW_40;
|
|
break;
|
|
case RATE_INFO_BW_80:
|
|
bw = BW_80;
|
|
break;
|
|
case RATE_INFO_BW_160:
|
|
bw = BW_160;
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
|
|
switch (status->encoding) {
|
|
case RX_ENC_VHT:
|
|
streams = status->nss;
|
|
idx = status->rate_idx;
|
|
group = VHT_GROUP_IDX(streams, sgi, bw);
|
|
break;
|
|
case RX_ENC_HT:
|
|
streams = ((status->rate_idx >> 3) & 3) + 1;
|
|
idx = status->rate_idx & 7;
|
|
group = HT_GROUP_IDX(streams, sgi, bw);
|
|
break;
|
|
case RX_ENC_HE:
|
|
streams = status->nss;
|
|
idx = status->rate_idx;
|
|
group = HE_GROUP_IDX(streams, status->he_gi, bw);
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
|
|
if (WARN_ON_ONCE((status->encoding != RX_ENC_HE && streams > 4) ||
|
|
(status->encoding == RX_ENC_HE && streams > 8)))
|
|
return 0;
|
|
|
|
duration = airtime_mcs_groups[group].duration[idx];
|
|
duration <<= airtime_mcs_groups[group].shift;
|
|
*overhead = 36 + (streams << 2);
|
|
|
|
return duration;
|
|
}
|
|
|
|
|
|
u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
|
|
struct ieee80211_rx_status *status,
|
|
int len)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
u32 duration, overhead = 0;
|
|
|
|
if (status->encoding == RX_ENC_LEGACY) {
|
|
const struct ieee80211_rate *rate;
|
|
bool sp = status->enc_flags & RX_ENC_FLAG_SHORTPRE;
|
|
bool cck;
|
|
|
|
if (WARN_ON_ONCE(status->band > NL80211_BAND_5GHZ))
|
|
return 0;
|
|
|
|
sband = hw->wiphy->bands[status->band];
|
|
if (!sband || status->rate_idx >= sband->n_bitrates)
|
|
return 0;
|
|
|
|
rate = &sband->bitrates[status->rate_idx];
|
|
cck = rate->flags & IEEE80211_RATE_MANDATORY_B;
|
|
|
|
return ieee80211_calc_legacy_rate_duration(rate->bitrate, sp,
|
|
cck, len);
|
|
}
|
|
|
|
duration = ieee80211_get_rate_duration(hw, status, &overhead);
|
|
if (!duration)
|
|
return 0;
|
|
|
|
duration *= len;
|
|
duration /= AVG_PKT_SIZE;
|
|
duration /= 1024;
|
|
|
|
return duration + overhead;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_calc_rx_airtime);
|
|
|
|
static bool ieee80211_fill_rate_info(struct ieee80211_hw *hw,
|
|
struct ieee80211_rx_status *stat, u8 band,
|
|
struct rate_info *ri)
|
|
{
|
|
struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
|
|
int i;
|
|
|
|
if (!ri || !sband)
|
|
return false;
|
|
|
|
stat->bw = ri->bw;
|
|
stat->nss = ri->nss;
|
|
stat->rate_idx = ri->mcs;
|
|
|
|
if (ri->flags & RATE_INFO_FLAGS_HE_MCS)
|
|
stat->encoding = RX_ENC_HE;
|
|
else if (ri->flags & RATE_INFO_FLAGS_VHT_MCS)
|
|
stat->encoding = RX_ENC_VHT;
|
|
else if (ri->flags & RATE_INFO_FLAGS_MCS)
|
|
stat->encoding = RX_ENC_HT;
|
|
else
|
|
stat->encoding = RX_ENC_LEGACY;
|
|
|
|
if (ri->flags & RATE_INFO_FLAGS_SHORT_GI)
|
|
stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;
|
|
|
|
stat->he_gi = ri->he_gi;
|
|
|
|
if (stat->encoding != RX_ENC_LEGACY)
|
|
return true;
|
|
|
|
stat->rate_idx = 0;
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if (ri->legacy != sband->bitrates[i].bitrate)
|
|
continue;
|
|
|
|
stat->rate_idx = i;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static int ieee80211_fill_rx_status(struct ieee80211_rx_status *stat,
|
|
struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_rate *rate,
|
|
struct rate_info *ri, u8 band, int len)
|
|
{
|
|
memset(stat, 0, sizeof(*stat));
|
|
stat->band = band;
|
|
|
|
if (ieee80211_fill_rate_info(hw, stat, band, ri))
|
|
return 0;
|
|
|
|
if (rate->idx < 0 || !rate->count)
|
|
return -1;
|
|
|
|
if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
|
|
stat->bw = RATE_INFO_BW_80;
|
|
else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
|
|
stat->bw = RATE_INFO_BW_40;
|
|
else
|
|
stat->bw = RATE_INFO_BW_20;
|
|
|
|
stat->enc_flags = 0;
|
|
if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
|
|
stat->enc_flags |= RX_ENC_FLAG_SHORTPRE;
|
|
if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
|
|
stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;
|
|
|
|
stat->rate_idx = rate->idx;
|
|
if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
|
|
stat->encoding = RX_ENC_VHT;
|
|
stat->rate_idx = ieee80211_rate_get_vht_mcs(rate);
|
|
stat->nss = ieee80211_rate_get_vht_nss(rate);
|
|
} else if (rate->flags & IEEE80211_TX_RC_MCS) {
|
|
stat->encoding = RX_ENC_HT;
|
|
} else {
|
|
stat->encoding = RX_ENC_LEGACY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u32 ieee80211_calc_tx_airtime_rate(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_rate *rate,
|
|
struct rate_info *ri,
|
|
u8 band, int len)
|
|
{
|
|
struct ieee80211_rx_status stat;
|
|
|
|
if (ieee80211_fill_rx_status(&stat, hw, rate, ri, band, len))
|
|
return 0;
|
|
|
|
return ieee80211_calc_rx_airtime(hw, &stat, len);
|
|
}
|
|
|
|
u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_info *info,
|
|
int len)
|
|
{
|
|
u32 duration = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) {
|
|
struct ieee80211_tx_rate *rate = &info->status.rates[i];
|
|
u32 cur_duration;
|
|
|
|
cur_duration = ieee80211_calc_tx_airtime_rate(hw, rate, NULL,
|
|
info->band, len);
|
|
if (!cur_duration)
|
|
break;
|
|
|
|
duration += cur_duration * rate->count;
|
|
}
|
|
|
|
return duration;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_calc_tx_airtime);
|
|
|
|
u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
struct ieee80211_sta *pubsta,
|
|
int len, bool ampdu)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_chanctx_conf *conf;
|
|
int rateidx, shift = 0;
|
|
bool cck, short_pream;
|
|
u32 basic_rates;
|
|
u8 band = 0;
|
|
u16 rate;
|
|
|
|
len += 38; /* Ethernet header length */
|
|
|
|
conf = rcu_dereference(vif->chanctx_conf);
|
|
if (conf) {
|
|
band = conf->def.chan->band;
|
|
shift = ieee80211_chandef_get_shift(&conf->def);
|
|
}
|
|
|
|
if (pubsta) {
|
|
struct sta_info *sta = container_of(pubsta, struct sta_info,
|
|
sta);
|
|
struct ieee80211_rx_status stat;
|
|
struct ieee80211_tx_rate *rate = &sta->tx_stats.last_rate;
|
|
struct rate_info *ri = &sta->tx_stats.last_rate_info;
|
|
u32 duration, overhead;
|
|
u8 agg_shift;
|
|
|
|
if (ieee80211_fill_rx_status(&stat, hw, rate, ri, band, len))
|
|
return 0;
|
|
|
|
if (stat.encoding == RX_ENC_LEGACY || !ampdu)
|
|
return ieee80211_calc_rx_airtime(hw, &stat, len);
|
|
|
|
duration = ieee80211_get_rate_duration(hw, &stat, &overhead);
|
|
/*
|
|
* Assume that HT/VHT transmission on any AC except VO will
|
|
* use aggregation. Since we don't have reliable reporting
|
|
* of aggregation length, assume an average size based on the
|
|
* tx rate.
|
|
* This will not be very accurate, but much better than simply
|
|
* assuming un-aggregated tx in all cases.
|
|
*/
|
|
if (duration > 400 * 1024) /* <= VHT20 MCS2 1S */
|
|
agg_shift = 1;
|
|
else if (duration > 250 * 1024) /* <= VHT20 MCS3 1S or MCS1 2S */
|
|
agg_shift = 2;
|
|
else if (duration > 150 * 1024) /* <= VHT20 MCS5 1S or MCS2 2S */
|
|
agg_shift = 3;
|
|
else if (duration > 70 * 1024) /* <= VHT20 MCS5 2S */
|
|
agg_shift = 4;
|
|
else if (stat.encoding != RX_ENC_HE ||
|
|
duration > 20 * 1024) /* <= HE40 MCS6 2S */
|
|
agg_shift = 5;
|
|
else
|
|
agg_shift = 6;
|
|
|
|
duration *= len;
|
|
duration /= AVG_PKT_SIZE;
|
|
duration /= 1024;
|
|
duration += (overhead >> agg_shift);
|
|
|
|
return max_t(u32, duration, 4);
|
|
}
|
|
|
|
if (!conf)
|
|
return 0;
|
|
|
|
/* No station to get latest rate from, so calculate the worst-case
|
|
* duration using the lowest configured basic rate.
|
|
*/
|
|
sband = hw->wiphy->bands[band];
|
|
|
|
basic_rates = vif->bss_conf.basic_rates;
|
|
short_pream = vif->bss_conf.use_short_preamble;
|
|
|
|
rateidx = basic_rates ? ffs(basic_rates) - 1 : 0;
|
|
rate = sband->bitrates[rateidx].bitrate << shift;
|
|
cck = sband->bitrates[rateidx].flags & IEEE80211_RATE_MANDATORY_B;
|
|
|
|
return ieee80211_calc_legacy_rate_duration(rate, short_pream, cck, len);
|
|
}
|