1 /* 2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #ifndef __RC_MINSTREL_HT_H 10 #define __RC_MINSTREL_HT_H 11 12 /* 13 * The number of streams can be changed to 2 to reduce code 14 * size and memory footprint. 15 */ 16 #define MINSTREL_MAX_STREAMS 3 17 #define MINSTREL_STREAM_GROUPS 4 18 19 #define MCS_GROUP_RATES 8 20 21 struct mcs_group { 22 u32 flags; 23 unsigned int streams; 24 unsigned int duration[MCS_GROUP_RATES]; 25 }; 26 27 extern const struct mcs_group minstrel_mcs_groups[]; 28 29 struct minstrel_rate_stats { 30 /* current / last sampling period attempts/success counters */ 31 unsigned int attempts, last_attempts; 32 unsigned int success, last_success; 33 34 /* total attempts/success counters */ 35 u64 att_hist, succ_hist; 36 37 /* current throughput */ 38 unsigned int cur_tp; 39 40 /* packet delivery probabilities */ 41 unsigned int cur_prob, probability; 42 43 /* maximum retry counts */ 44 unsigned int retry_count; 45 unsigned int retry_count_rtscts; 46 47 bool retry_updated; 48 u8 sample_skipped; 49 }; 50 51 struct minstrel_mcs_group_data { 52 u8 index; 53 u8 column; 54 55 /* bitfield of supported MCS rates of this group */ 56 u8 supported; 57 58 /* selected primary rates */ 59 unsigned int max_tp_rate; 60 unsigned int max_tp_rate2; 61 unsigned int max_prob_rate; 62 63 /* MCS rate statistics */ 64 struct minstrel_rate_stats rates[MCS_GROUP_RATES]; 65 }; 66 67 struct minstrel_ht_sta { 68 struct ieee80211_sta *sta; 69 70 /* ampdu length (average, per sampling interval) */ 71 unsigned int ampdu_len; 72 unsigned int ampdu_packets; 73 74 /* ampdu length (EWMA) */ 75 unsigned int avg_ampdu_len; 76 77 /* best throughput rate */ 78 unsigned int max_tp_rate; 79 80 /* second best throughput rate */ 81 unsigned int max_tp_rate2; 82 83 /* best probability rate */ 84 unsigned int max_prob_rate; 85 unsigned int max_prob_streams; 86 87 /* time of last status update */ 88 unsigned long stats_update; 89 90 /* overhead time in usec for each frame */ 91 unsigned int overhead; 92 unsigned int overhead_rtscts; 93 94 unsigned int total_packets; 95 unsigned int sample_packets; 96 97 /* tx flags to add for frames for this sta */ 98 u32 tx_flags; 99 100 u8 sample_wait; 101 u8 sample_tries; 102 u8 sample_count; 103 u8 sample_slow; 104 105 /* current MCS group to be sampled */ 106 u8 sample_group; 107 108 u8 cck_supported; 109 u8 cck_supported_short; 110 111 /* MCS rate group info and statistics */ 112 struct minstrel_mcs_group_data groups[MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS + 1]; 113 }; 114 115 struct minstrel_ht_sta_priv { 116 union { 117 struct minstrel_ht_sta ht; 118 struct minstrel_sta_info legacy; 119 }; 120 #ifdef CONFIG_MAC80211_DEBUGFS 121 struct dentry *dbg_stats; 122 #endif 123 void *ratelist; 124 void *sample_table; 125 bool is_ht; 126 }; 127 128 void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir); 129 void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta); 130 131 #endif 132