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203 lines
5.0 KiB
203 lines
5.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2010 Felix Fietkau <[email protected]> |
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*/ |
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#ifndef __RC_MINSTREL_HT_H |
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#define __RC_MINSTREL_HT_H |
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#include <linux/bitfield.h> |
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/* number of highest throughput rates to consider*/ |
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#define MAX_THR_RATES 4 |
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#define SAMPLE_COLUMNS 10 /* number of columns in sample table */ |
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/* scaled fraction values */ |
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#define MINSTREL_SCALE 12 |
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#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div) |
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#define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE) |
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#define EWMA_LEVEL 96 /* ewma weighting factor [/EWMA_DIV] */ |
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#define EWMA_DIV 128 |
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/* |
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* Coefficients for moving average with noise filter (period=16), |
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* scaled by 10 bits |
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* |
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* a1 = exp(-pi * sqrt(2) / period) |
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* coeff2 = 2 * a1 * cos(sqrt(2) * 2 * pi / period) |
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* coeff3 = -sqr(a1) |
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* coeff1 = 1 - coeff2 - coeff3 |
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*/ |
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#define MINSTREL_AVG_COEFF1 (MINSTREL_FRAC(1, 1) - \ |
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MINSTREL_AVG_COEFF2 - \ |
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MINSTREL_AVG_COEFF3) |
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#define MINSTREL_AVG_COEFF2 0x00001499 |
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#define MINSTREL_AVG_COEFF3 -0x0000092e |
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/* |
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* The number of streams can be changed to 2 to reduce code |
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* size and memory footprint. |
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*/ |
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#define MINSTREL_MAX_STREAMS 4 |
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#define MINSTREL_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */ |
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#define MINSTREL_VHT_STREAM_GROUPS 6 /* BW(=3) * SGI(=2) */ |
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#define MINSTREL_HT_GROUPS_NB (MINSTREL_MAX_STREAMS * \ |
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MINSTREL_HT_STREAM_GROUPS) |
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#define MINSTREL_VHT_GROUPS_NB (MINSTREL_MAX_STREAMS * \ |
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MINSTREL_VHT_STREAM_GROUPS) |
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#define MINSTREL_LEGACY_GROUPS_NB 2 |
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#define MINSTREL_GROUPS_NB (MINSTREL_HT_GROUPS_NB + \ |
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MINSTREL_VHT_GROUPS_NB + \ |
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MINSTREL_LEGACY_GROUPS_NB) |
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#define MINSTREL_HT_GROUP_0 0 |
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#define MINSTREL_CCK_GROUP (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB) |
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#define MINSTREL_OFDM_GROUP (MINSTREL_CCK_GROUP + 1) |
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#define MINSTREL_VHT_GROUP_0 (MINSTREL_OFDM_GROUP + 1) |
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#define MCS_GROUP_RATES 10 |
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#define MI_RATE_IDX_MASK GENMASK(3, 0) |
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#define MI_RATE_GROUP_MASK GENMASK(15, 4) |
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#define MI_RATE(_group, _idx) \ |
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(FIELD_PREP(MI_RATE_GROUP_MASK, _group) | \ |
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FIELD_PREP(MI_RATE_IDX_MASK, _idx)) |
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#define MI_RATE_IDX(_rate) FIELD_GET(MI_RATE_IDX_MASK, _rate) |
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#define MI_RATE_GROUP(_rate) FIELD_GET(MI_RATE_GROUP_MASK, _rate) |
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#define MINSTREL_SAMPLE_RATES 5 /* rates per sample type */ |
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#define MINSTREL_SAMPLE_INTERVAL (HZ / 50) |
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struct minstrel_priv { |
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struct ieee80211_hw *hw; |
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bool has_mrr; |
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unsigned int cw_min; |
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unsigned int cw_max; |
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unsigned int max_retry; |
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unsigned int segment_size; |
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unsigned int update_interval; |
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u8 cck_rates[4]; |
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u8 ofdm_rates[NUM_NL80211_BANDS][8]; |
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#ifdef CONFIG_MAC80211_DEBUGFS |
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/* |
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* enable fixed rate processing per RC |
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* - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx |
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* - write -1 to enable RC processing again |
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* - setting will be applied on next update |
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*/ |
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u32 fixed_rate_idx; |
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#endif |
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}; |
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struct mcs_group { |
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u16 flags; |
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u8 streams; |
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u8 shift; |
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u8 bw; |
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u16 duration[MCS_GROUP_RATES]; |
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}; |
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extern const s16 minstrel_cck_bitrates[4]; |
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extern const s16 minstrel_ofdm_bitrates[8]; |
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extern const struct mcs_group minstrel_mcs_groups[]; |
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struct minstrel_rate_stats { |
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/* current / last sampling period attempts/success counters */ |
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u16 attempts, last_attempts; |
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u16 success, last_success; |
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/* total attempts/success counters */ |
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u32 att_hist, succ_hist; |
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/* prob_avg - moving average of prob */ |
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u16 prob_avg; |
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u16 prob_avg_1; |
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/* maximum retry counts */ |
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u8 retry_count; |
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u8 retry_count_rtscts; |
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bool retry_updated; |
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}; |
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enum minstrel_sample_type { |
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MINSTREL_SAMPLE_TYPE_INC, |
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MINSTREL_SAMPLE_TYPE_JUMP, |
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MINSTREL_SAMPLE_TYPE_SLOW, |
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__MINSTREL_SAMPLE_TYPE_MAX |
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}; |
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struct minstrel_mcs_group_data { |
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u8 index; |
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u8 column; |
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/* sorted rate set within a MCS group*/ |
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u16 max_group_tp_rate[MAX_THR_RATES]; |
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u16 max_group_prob_rate; |
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/* MCS rate statistics */ |
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struct minstrel_rate_stats rates[MCS_GROUP_RATES]; |
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}; |
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struct minstrel_sample_category { |
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u8 sample_group; |
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u16 sample_rates[MINSTREL_SAMPLE_RATES]; |
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u16 cur_sample_rates[MINSTREL_SAMPLE_RATES]; |
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}; |
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struct minstrel_ht_sta { |
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struct ieee80211_sta *sta; |
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/* ampdu length (average, per sampling interval) */ |
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unsigned int ampdu_len; |
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unsigned int ampdu_packets; |
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/* ampdu length (EWMA) */ |
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unsigned int avg_ampdu_len; |
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/* overall sorted rate set */ |
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u16 max_tp_rate[MAX_THR_RATES]; |
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u16 max_prob_rate; |
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/* time of last status update */ |
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unsigned long last_stats_update; |
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/* overhead time in usec for each frame */ |
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unsigned int overhead; |
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unsigned int overhead_rtscts; |
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unsigned int overhead_legacy; |
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unsigned int overhead_legacy_rtscts; |
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unsigned int total_packets; |
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unsigned int sample_packets; |
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/* tx flags to add for frames for this sta */ |
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u32 tx_flags; |
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u8 band; |
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u8 sample_seq; |
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u16 sample_rate; |
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unsigned long sample_time; |
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struct minstrel_sample_category sample[__MINSTREL_SAMPLE_TYPE_MAX]; |
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/* Bitfield of supported MCS rates of all groups */ |
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u16 supported[MINSTREL_GROUPS_NB]; |
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/* MCS rate group info and statistics */ |
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struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB]; |
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}; |
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void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir); |
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int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate, |
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int prob_avg); |
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#endif
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