1d2912cb1SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2ec8aa669SFelix Fietkau /* 3ec8aa669SFelix Fietkau * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org> 4ec8aa669SFelix Fietkau */ 5ec8aa669SFelix Fietkau 6ec8aa669SFelix Fietkau #ifndef __RC_MINSTREL_HT_H 7ec8aa669SFelix Fietkau #define __RC_MINSTREL_HT_H 8ec8aa669SFelix Fietkau 9a42fa256SFelix Fietkau #include <linux/bitfield.h> 10a42fa256SFelix Fietkau 11cbda98c7SFelix Fietkau /* number of highest throughput rates to consider*/ 12cbda98c7SFelix Fietkau #define MAX_THR_RATES 4 13cbda98c7SFelix Fietkau #define SAMPLE_COLUMNS 10 /* number of columns in sample table */ 14cbda98c7SFelix Fietkau 15cbda98c7SFelix Fietkau /* scaled fraction values */ 16cbda98c7SFelix Fietkau #define MINSTREL_SCALE 12 17cbda98c7SFelix Fietkau #define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div) 18cbda98c7SFelix Fietkau #define MINSTREL_TRUNC(val) ((val) >> MINSTREL_SCALE) 19cbda98c7SFelix Fietkau 20cbda98c7SFelix Fietkau #define EWMA_LEVEL 96 /* ewma weighting factor [/EWMA_DIV] */ 21cbda98c7SFelix Fietkau #define EWMA_DIV 128 22cbda98c7SFelix Fietkau 23cbda98c7SFelix Fietkau /* 24cbda98c7SFelix Fietkau * Coefficients for moving average with noise filter (period=16), 25cbda98c7SFelix Fietkau * scaled by 10 bits 26cbda98c7SFelix Fietkau * 27cbda98c7SFelix Fietkau * a1 = exp(-pi * sqrt(2) / period) 28cbda98c7SFelix Fietkau * coeff2 = 2 * a1 * cos(sqrt(2) * 2 * pi / period) 29cbda98c7SFelix Fietkau * coeff3 = -sqr(a1) 30cbda98c7SFelix Fietkau * coeff1 = 1 - coeff2 - coeff3 31cbda98c7SFelix Fietkau */ 32cbda98c7SFelix Fietkau #define MINSTREL_AVG_COEFF1 (MINSTREL_FRAC(1, 1) - \ 33cbda98c7SFelix Fietkau MINSTREL_AVG_COEFF2 - \ 34cbda98c7SFelix Fietkau MINSTREL_AVG_COEFF3) 35cbda98c7SFelix Fietkau #define MINSTREL_AVG_COEFF2 0x00001499 36cbda98c7SFelix Fietkau #define MINSTREL_AVG_COEFF3 -0x0000092e 37cbda98c7SFelix Fietkau 38ec8aa669SFelix Fietkau /* 39ec8aa669SFelix Fietkau * The number of streams can be changed to 2 to reduce code 40ec8aa669SFelix Fietkau * size and memory footprint. 41ec8aa669SFelix Fietkau */ 427f2e12e1SFelix Fietkau #define MINSTREL_MAX_STREAMS 4 438a0ee4feSKarl Beldan #define MINSTREL_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */ 449208247dSKarl Beldan #define MINSTREL_VHT_STREAM_GROUPS 6 /* BW(=3) * SGI(=2) */ 458a0ee4feSKarl Beldan 468a0ee4feSKarl Beldan #define MINSTREL_HT_GROUPS_NB (MINSTREL_MAX_STREAMS * \ 478a0ee4feSKarl Beldan MINSTREL_HT_STREAM_GROUPS) 489208247dSKarl Beldan #define MINSTREL_VHT_GROUPS_NB (MINSTREL_MAX_STREAMS * \ 499208247dSKarl Beldan MINSTREL_VHT_STREAM_GROUPS) 50a7844a53SFelix Fietkau #define MINSTREL_LEGACY_GROUPS_NB 2 518a0ee4feSKarl Beldan #define MINSTREL_GROUPS_NB (MINSTREL_HT_GROUPS_NB + \ 529208247dSKarl Beldan MINSTREL_VHT_GROUPS_NB + \ 53a7844a53SFelix Fietkau MINSTREL_LEGACY_GROUPS_NB) 548a0ee4feSKarl Beldan 558a0ee4feSKarl Beldan #define MINSTREL_HT_GROUP_0 0 568a0ee4feSKarl Beldan #define MINSTREL_CCK_GROUP (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB) 57a7844a53SFelix Fietkau #define MINSTREL_OFDM_GROUP (MINSTREL_CCK_GROUP + 1) 58a7844a53SFelix Fietkau #define MINSTREL_VHT_GROUP_0 (MINSTREL_OFDM_GROUP + 1) 59ec8aa669SFelix Fietkau 609208247dSKarl Beldan #define MCS_GROUP_RATES 10 61ec8aa669SFelix Fietkau 62a42fa256SFelix Fietkau #define MI_RATE_IDX_MASK GENMASK(3, 0) 63a42fa256SFelix Fietkau #define MI_RATE_GROUP_MASK GENMASK(15, 4) 64a42fa256SFelix Fietkau 65a42fa256SFelix Fietkau #define MI_RATE(_group, _idx) \ 66a42fa256SFelix Fietkau (FIELD_PREP(MI_RATE_GROUP_MASK, _group) | \ 67a42fa256SFelix Fietkau FIELD_PREP(MI_RATE_IDX_MASK, _idx)) 68a42fa256SFelix Fietkau 69a42fa256SFelix Fietkau #define MI_RATE_IDX(_rate) FIELD_GET(MI_RATE_IDX_MASK, _rate) 70a42fa256SFelix Fietkau #define MI_RATE_GROUP(_rate) FIELD_GET(MI_RATE_GROUP_MASK, _rate) 71a42fa256SFelix Fietkau 7280d55154SFelix Fietkau #define MINSTREL_SAMPLE_RATES 5 /* rates per sample type */ 7380d55154SFelix Fietkau #define MINSTREL_SAMPLE_INTERVAL (HZ / 50) 74a42fa256SFelix Fietkau 75cbda98c7SFelix Fietkau struct minstrel_priv { 76cbda98c7SFelix Fietkau struct ieee80211_hw *hw; 77cbda98c7SFelix Fietkau unsigned int cw_min; 78cbda98c7SFelix Fietkau unsigned int cw_max; 79cbda98c7SFelix Fietkau unsigned int max_retry; 80cbda98c7SFelix Fietkau unsigned int segment_size; 81cbda98c7SFelix Fietkau unsigned int update_interval; 82cbda98c7SFelix Fietkau 83cbda98c7SFelix Fietkau u8 cck_rates[4]; 84cbda98c7SFelix Fietkau u8 ofdm_rates[NUM_NL80211_BANDS][8]; 85cbda98c7SFelix Fietkau 86cbda98c7SFelix Fietkau #ifdef CONFIG_MAC80211_DEBUGFS 87cbda98c7SFelix Fietkau /* 88cbda98c7SFelix Fietkau * enable fixed rate processing per RC 89cbda98c7SFelix Fietkau * - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx 90cbda98c7SFelix Fietkau * - write -1 to enable RC processing again 91cbda98c7SFelix Fietkau * - setting will be applied on next update 92cbda98c7SFelix Fietkau */ 93cbda98c7SFelix Fietkau u32 fixed_rate_idx; 94cbda98c7SFelix Fietkau #endif 95cbda98c7SFelix Fietkau }; 96cbda98c7SFelix Fietkau 97cbda98c7SFelix Fietkau 98ec8aa669SFelix Fietkau struct mcs_group { 99202df504SFelix Fietkau u16 flags; 100202df504SFelix Fietkau u8 streams; 101202df504SFelix Fietkau u8 shift; 10248cb3952SFelix Fietkau u8 bw; 103202df504SFelix Fietkau u16 duration[MCS_GROUP_RATES]; 104ec8aa669SFelix Fietkau }; 105ec8aa669SFelix Fietkau 106a7844a53SFelix Fietkau extern const s16 minstrel_cck_bitrates[4]; 107a7844a53SFelix Fietkau extern const s16 minstrel_ofdm_bitrates[8]; 108de66bfd8SJohn W. Linville extern const struct mcs_group minstrel_mcs_groups[]; 109de66bfd8SJohn W. Linville 110cbda98c7SFelix Fietkau struct minstrel_rate_stats { 111cbda98c7SFelix Fietkau /* current / last sampling period attempts/success counters */ 112cbda98c7SFelix Fietkau u16 attempts, last_attempts; 113cbda98c7SFelix Fietkau u16 success, last_success; 114cbda98c7SFelix Fietkau 115cbda98c7SFelix Fietkau /* total attempts/success counters */ 116cbda98c7SFelix Fietkau u32 att_hist, succ_hist; 117cbda98c7SFelix Fietkau 118cbda98c7SFelix Fietkau /* prob_avg - moving average of prob */ 119cbda98c7SFelix Fietkau u16 prob_avg; 120cbda98c7SFelix Fietkau u16 prob_avg_1; 121cbda98c7SFelix Fietkau 122cbda98c7SFelix Fietkau /* maximum retry counts */ 123cbda98c7SFelix Fietkau u8 retry_count; 124cbda98c7SFelix Fietkau u8 retry_count_rtscts; 125cbda98c7SFelix Fietkau 126cbda98c7SFelix Fietkau bool retry_updated; 127cbda98c7SFelix Fietkau }; 128cbda98c7SFelix Fietkau 12980d55154SFelix Fietkau enum minstrel_sample_type { 13080d55154SFelix Fietkau MINSTREL_SAMPLE_TYPE_INC, 13180d55154SFelix Fietkau MINSTREL_SAMPLE_TYPE_JUMP, 13280d55154SFelix Fietkau MINSTREL_SAMPLE_TYPE_SLOW, 13380d55154SFelix Fietkau __MINSTREL_SAMPLE_TYPE_MAX 13480d55154SFelix Fietkau }; 13580d55154SFelix Fietkau 136ec8aa669SFelix Fietkau struct minstrel_mcs_group_data { 137ec8aa669SFelix Fietkau u8 index; 138ec8aa669SFelix Fietkau u8 column; 139ec8aa669SFelix Fietkau 1405935839aSThomas Huehn /* sorted rate set within a MCS group*/ 141d4d141caSKarl Beldan u16 max_group_tp_rate[MAX_THR_RATES]; 142d4d141caSKarl Beldan u16 max_group_prob_rate; 143ec8aa669SFelix Fietkau 144ec8aa669SFelix Fietkau /* MCS rate statistics */ 145ec8aa669SFelix Fietkau struct minstrel_rate_stats rates[MCS_GROUP_RATES]; 146ec8aa669SFelix Fietkau }; 147ec8aa669SFelix Fietkau 14880d55154SFelix Fietkau struct minstrel_sample_category { 14980d55154SFelix Fietkau u8 sample_group; 15080d55154SFelix Fietkau u16 sample_rates[MINSTREL_SAMPLE_RATES]; 15180d55154SFelix Fietkau u16 cur_sample_rates[MINSTREL_SAMPLE_RATES]; 15280d55154SFelix Fietkau }; 15380d55154SFelix Fietkau 154ec8aa669SFelix Fietkau struct minstrel_ht_sta { 155a8566662SFelix Fietkau struct ieee80211_sta *sta; 156a8566662SFelix Fietkau 157ec8aa669SFelix Fietkau /* ampdu length (average, per sampling interval) */ 158ec8aa669SFelix Fietkau unsigned int ampdu_len; 159ec8aa669SFelix Fietkau unsigned int ampdu_packets; 160ec8aa669SFelix Fietkau 161ec8aa669SFelix Fietkau /* ampdu length (EWMA) */ 162ec8aa669SFelix Fietkau unsigned int avg_ampdu_len; 163ec8aa669SFelix Fietkau 1645935839aSThomas Huehn /* overall sorted rate set */ 165d4d141caSKarl Beldan u16 max_tp_rate[MAX_THR_RATES]; 166d4d141caSKarl Beldan u16 max_prob_rate; 167ec8aa669SFelix Fietkau 168ec8aa669SFelix Fietkau /* time of last status update */ 1699134073bSThomas Huehn unsigned long last_stats_update; 170ec8aa669SFelix Fietkau 171ec8aa669SFelix Fietkau /* overhead time in usec for each frame */ 172ec8aa669SFelix Fietkau unsigned int overhead; 173ec8aa669SFelix Fietkau unsigned int overhead_rtscts; 174f84de063SFelix Fietkau unsigned int overhead_legacy; 175f84de063SFelix Fietkau unsigned int overhead_legacy_rtscts; 176ec8aa669SFelix Fietkau 177ec8aa669SFelix Fietkau unsigned int total_packets; 178ec8aa669SFelix Fietkau unsigned int sample_packets; 179ec8aa669SFelix Fietkau 180ec8aa669SFelix Fietkau /* tx flags to add for frames for this sta */ 181ec8aa669SFelix Fietkau u32 tx_flags; 182*569cf386SJonas Jelonek bool use_short_preamble; 183c0eb09aaSFelix Fietkau u8 band; 18480d55154SFelix Fietkau 18580d55154SFelix Fietkau u8 sample_seq; 18648cb3952SFelix Fietkau u16 sample_rate; 18748cb3952SFelix Fietkau 188c0eb09aaSFelix Fietkau unsigned long sample_time; 189c0eb09aaSFelix Fietkau struct minstrel_sample_category sample[__MINSTREL_SAMPLE_TYPE_MAX]; 190a7844a53SFelix Fietkau 19141d08583SFelix Fietkau /* Bitfield of supported MCS rates of all groups */ 19241d08583SFelix Fietkau u16 supported[MINSTREL_GROUPS_NB]; 19341d08583SFelix Fietkau 194ec8aa669SFelix Fietkau /* MCS rate group info and statistics */ 1958a0ee4feSKarl Beldan struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB]; 196ec8aa669SFelix Fietkau }; 197ec8aa669SFelix Fietkau 198ec8aa669SFelix Fietkau void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir); 19950e55a8eSThomas Huehn int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate, 2005f63afe0SFelix Fietkau int prob_avg); 201ec8aa669SFelix Fietkau 202ec8aa669SFelix Fietkau #endif 203