diff options
Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht.c | 1398 |
1 files changed, 848 insertions, 550 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 694a31978a04..3d91b98db099 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2010-2013 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2019-2022 Intel Corporation */ #include <linux/netdevice.h> #include <linux/types.h> @@ -9,17 +10,15 @@ #include <linux/random.h> #include <linux/moduleparam.h> #include <linux/ieee80211.h> +#include <linux/minmax.h> #include <net/mac80211.h> #include "rate.h" #include "sta_info.h" -#include "rc80211_minstrel.h" #include "rc80211_minstrel_ht.h" #define AVG_AMPDU_SIZE 16 #define AVG_PKT_SIZE 1200 -#define SAMPLE_SWITCH_THR 100 - /* Number of bits for an average sized packet */ #define MCS_NBITS ((AVG_PKT_SIZE * AVG_AMPDU_SIZE) << 3) @@ -135,20 +134,16 @@ __VHT_GROUP(_streams, _sgi, _bw, \ VHT_GROUP_SHIFT(_streams, _sgi, _bw)) -#define CCK_DURATION(_bitrate, _short, _len) \ +#define CCK_DURATION(_bitrate, _short) \ (1000 * (10 /* SIFS */ + \ (_short ? 72 + 24 : 144 + 48) + \ - (8 * (_len + 4) * 10) / (_bitrate))) - -#define CCK_ACK_DURATION(_bitrate, _short) \ - (CCK_DURATION((_bitrate > 10 ? 20 : 10), false, 60) + \ - CCK_DURATION(_bitrate, _short, AVG_PKT_SIZE)) + (8 * (AVG_PKT_SIZE + 4) * 10) / (_bitrate))) #define CCK_DURATION_LIST(_short, _s) \ - CCK_ACK_DURATION(10, _short) >> _s, \ - CCK_ACK_DURATION(20, _short) >> _s, \ - CCK_ACK_DURATION(55, _short) >> _s, \ - CCK_ACK_DURATION(110, _short) >> _s + CCK_DURATION(10, _short) >> _s, \ + CCK_DURATION(20, _short) >> _s, \ + CCK_DURATION(55, _short) >> _s, \ + CCK_DURATION(110, _short) >> _s #define __CCK_GROUP(_s) \ [MINSTREL_CCK_GROUP] = { \ @@ -162,10 +157,42 @@ } #define CCK_GROUP_SHIFT \ - GROUP_SHIFT(CCK_ACK_DURATION(10, false)) + GROUP_SHIFT(CCK_DURATION(10, false)) #define CCK_GROUP __CCK_GROUP(CCK_GROUP_SHIFT) +#define OFDM_DURATION(_bitrate) \ + (1000 * (16 /* SIFS + signal ext */ + \ + 16 /* T_PREAMBLE */ + \ + 4 /* T_SIGNAL */ + \ + 4 * (((16 + 80 * (AVG_PKT_SIZE + 4) + 6) / \ + ((_bitrate) * 4))))) + +#define OFDM_DURATION_LIST(_s) \ + OFDM_DURATION(60) >> _s, \ + OFDM_DURATION(90) >> _s, \ + OFDM_DURATION(120) >> _s, \ + OFDM_DURATION(180) >> _s, \ + OFDM_DURATION(240) >> _s, \ + OFDM_DURATION(360) >> _s, \ + OFDM_DURATION(480) >> _s, \ + OFDM_DURATION(540) >> _s + +#define __OFDM_GROUP(_s) \ + [MINSTREL_OFDM_GROUP] = { \ + .streams = 1, \ + .flags = 0, \ + .shift = _s, \ + .duration = { \ + OFDM_DURATION_LIST(_s), \ + } \ + } + +#define OFDM_GROUP_SHIFT \ + GROUP_SHIFT(OFDM_DURATION(60)) + +#define OFDM_GROUP __OFDM_GROUP(OFDM_GROUP_SHIFT) + static bool minstrel_vht_only = true; module_param(minstrel_vht_only, bool, 0644); @@ -202,6 +229,7 @@ const struct mcs_group minstrel_mcs_groups[] = { MCS_GROUP(4, 1, BW_40), CCK_GROUP, + OFDM_GROUP, VHT_GROUP(1, 0, BW_20), VHT_GROUP(2, 0, BW_20), @@ -234,7 +262,17 @@ const struct mcs_group minstrel_mcs_groups[] = { VHT_GROUP(4, 1, BW_80), }; +const s16 minstrel_cck_bitrates[4] = { 10, 20, 55, 110 }; +const s16 minstrel_ofdm_bitrates[8] = { 60, 90, 120, 180, 240, 360, 480, 540 }; static u8 sample_table[SAMPLE_COLUMNS][MCS_GROUP_RATES] __read_mostly; +static const u8 minstrel_sample_seq[] = { + MINSTREL_SAMPLE_TYPE_INC, + MINSTREL_SAMPLE_TYPE_JUMP, + MINSTREL_SAMPLE_TYPE_INC, + MINSTREL_SAMPLE_TYPE_JUMP, + MINSTREL_SAMPLE_TYPE_INC, + MINSTREL_SAMPLE_TYPE_SLOW, +}; static void minstrel_ht_update_rates(struct minstrel_priv *mp, struct minstrel_ht_sta *mi); @@ -278,6 +316,13 @@ minstrel_get_valid_vht_rates(int bw, int nss, __le16 mcs_map) return 0x3ff & ~mask; } +static bool +minstrel_ht_is_legacy_group(int group) +{ + return group == MINSTREL_CCK_GROUP || + group == MINSTREL_OFDM_GROUP; +} + /* * Look up an MCS group index based on mac80211 rate information */ @@ -289,6 +334,17 @@ minstrel_ht_get_group_idx(struct ieee80211_tx_rate *rate) !!(rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)); } +/* + * Look up an MCS group index based on new cfg80211 rate_info. + */ +static int +minstrel_ht_ri_get_group_idx(struct rate_info *rate) +{ + return GROUP_IDX((rate->mcs / 8) + 1, + !!(rate->flags & RATE_INFO_FLAGS_SHORT_GI), + !!(rate->bw & RATE_INFO_BW_40)); +} + static int minstrel_vht_get_group_idx(struct ieee80211_tx_rate *rate) { @@ -298,6 +354,18 @@ minstrel_vht_get_group_idx(struct ieee80211_tx_rate *rate) 2*!!(rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)); } +/* + * Look up an MCS group index based on new cfg80211 rate_info. + */ +static int +minstrel_vht_ri_get_group_idx(struct rate_info *rate) +{ + return VHT_GROUP_IDX(rate->nss, + !!(rate->flags & RATE_INFO_FLAGS_SHORT_GI), + !!(rate->bw & RATE_INFO_BW_40) + + 2*!!(rate->bw & RATE_INFO_BW_80)); +} + static struct minstrel_rate_stats * minstrel_ht_get_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, struct ieee80211_tx_rate *rate) @@ -307,37 +375,121 @@ minstrel_ht_get_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, if (rate->flags & IEEE80211_TX_RC_MCS) { group = minstrel_ht_get_group_idx(rate); idx = rate->idx % 8; - } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { + goto out; + } + + if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { group = minstrel_vht_get_group_idx(rate); idx = ieee80211_rate_get_vht_mcs(rate); - } else { - group = MINSTREL_CCK_GROUP; + goto out; + } + + group = MINSTREL_CCK_GROUP; + for (idx = 0; idx < ARRAY_SIZE(mp->cck_rates); idx++) { + if (!(mi->supported[group] & BIT(idx))) + continue; - for (idx = 0; idx < ARRAY_SIZE(mp->cck_rates); idx++) - if (rate->idx == mp->cck_rates[idx]) - break; + if (rate->idx != mp->cck_rates[idx]) + continue; /* short preamble */ if ((mi->supported[group] & BIT(idx + 4)) && (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)) idx += 4; + goto out; + } + + group = MINSTREL_OFDM_GROUP; + for (idx = 0; idx < ARRAY_SIZE(mp->ofdm_rates[0]); idx++) + if (rate->idx == mp->ofdm_rates[mi->band][idx]) + goto out; + + idx = 0; +out: + return &mi->groups[group].rates[idx]; +} + +/* + * Get the minstrel rate statistics for specified STA and rate info. + */ +static struct minstrel_rate_stats * +minstrel_ht_ri_get_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, + struct ieee80211_rate_status *rate_status) +{ + int group, idx; + struct rate_info *rate = &rate_status->rate_idx; + + if (rate->flags & RATE_INFO_FLAGS_MCS) { + group = minstrel_ht_ri_get_group_idx(rate); + idx = rate->mcs % 8; + goto out; + } + + if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) { + group = minstrel_vht_ri_get_group_idx(rate); + idx = rate->mcs; + goto out; + } + + group = MINSTREL_CCK_GROUP; + for (idx = 0; idx < ARRAY_SIZE(mp->cck_rates); idx++) { + if (rate->legacy != minstrel_cck_bitrates[ mp->cck_rates[idx] ]) + continue; + + /* short preamble */ + if ((mi->supported[group] & BIT(idx + 4)) && + mi->use_short_preamble) + idx += 4; + goto out; } + + group = MINSTREL_OFDM_GROUP; + for (idx = 0; idx < ARRAY_SIZE(mp->ofdm_rates[0]); idx++) + if (rate->legacy == minstrel_ofdm_bitrates[ mp->ofdm_rates[mi->band][idx] ]) + goto out; + + idx = 0; +out: return &mi->groups[group].rates[idx]; } static inline struct minstrel_rate_stats * minstrel_get_ratestats(struct minstrel_ht_sta *mi, int index) { - return &mi->groups[index / MCS_GROUP_RATES].rates[index % MCS_GROUP_RATES]; + return &mi->groups[MI_RATE_GROUP(index)].rates[MI_RATE_IDX(index)]; +} + +static inline int minstrel_get_duration(int index) +{ + const struct mcs_group *group = &minstrel_mcs_groups[MI_RATE_GROUP(index)]; + unsigned int duration = group->duration[MI_RATE_IDX(index)]; + + return duration << group->shift; } static unsigned int minstrel_ht_avg_ampdu_len(struct minstrel_ht_sta *mi) { - if (!mi->avg_ampdu_len) - return AVG_AMPDU_SIZE; + int duration; - return MINSTREL_TRUNC(mi->avg_ampdu_len); + if (mi->avg_ampdu_len) + return MINSTREL_TRUNC(mi->avg_ampdu_len); + + if (minstrel_ht_is_legacy_group(MI_RATE_GROUP(mi->max_tp_rate[0]))) + return 1; + + duration = minstrel_get_duration(mi->max_tp_rate[0]); + + if (duration > 400 * 1000) + return 2; + + if (duration > 250 * 1000) + return 4; + + if (duration > 150 * 1000) + return 8; + + return 16; } /* @@ -348,15 +500,19 @@ int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate, int prob_avg) { - unsigned int nsecs = 0; + unsigned int nsecs = 0, overhead = mi->overhead; + unsigned int ampdu_len = 1; - /* do not account throughput if sucess prob is below 10% */ + /* do not account throughput if success prob is below 10% */ if (prob_avg < MINSTREL_FRAC(10, 100)) return 0; - if (group != MINSTREL_CCK_GROUP) - nsecs = 1000 * mi->overhead / minstrel_ht_avg_ampdu_len(mi); + if (minstrel_ht_is_legacy_group(group)) + overhead = mi->overhead_legacy; + else + ampdu_len = minstrel_ht_avg_ampdu_len(mi); + nsecs = 1000 * overhead / ampdu_len; nsecs += minstrel_mcs_groups[group].duration[rate] << minstrel_mcs_groups[group].shift; @@ -366,10 +522,9 @@ minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate, * (prob is scaled - see MINSTREL_FRAC above) */ if (prob_avg > MINSTREL_FRAC(90, 100)) - return MINSTREL_TRUNC(100000 * ((MINSTREL_FRAC(90, 100) * 1000) - / nsecs)); - else - return MINSTREL_TRUNC(100000 * ((prob_avg * 1000) / nsecs)); + prob_avg = MINSTREL_FRAC(90, 100); + + return MINSTREL_TRUNC(100 * ((prob_avg * 1000000) / nsecs)); } /* @@ -387,14 +542,14 @@ minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u16 index, int tmp_group, tmp_idx, tmp_tp_avg, tmp_prob; int j = MAX_THR_RATES; - cur_group = index / MCS_GROUP_RATES; - cur_idx = index % MCS_GROUP_RATES; + cur_group = MI_RATE_GROUP(index); + cur_idx = MI_RATE_IDX(index); cur_prob = mi->groups[cur_group].rates[cur_idx].prob_avg; cur_tp_avg = minstrel_ht_get_tp_avg(mi, cur_group, cur_idx, cur_prob); do { - tmp_group = tp_list[j - 1] / MCS_GROUP_RATES; - tmp_idx = tp_list[j - 1] % MCS_GROUP_RATES; + tmp_group = MI_RATE_GROUP(tp_list[j - 1]); + tmp_idx = MI_RATE_IDX(tp_list[j - 1]); tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; tmp_tp_avg = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob); @@ -416,41 +571,50 @@ minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u16 index, * Find and set the topmost probability rate per sta and per group */ static void -minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index) +minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 *dest, u16 index) { struct minstrel_mcs_group_data *mg; struct minstrel_rate_stats *mrs; int tmp_group, tmp_idx, tmp_tp_avg, tmp_prob; - int max_tp_group, cur_tp_avg, cur_group, cur_idx; + int max_tp_group, max_tp_idx, max_tp_prob; + int cur_tp_avg, cur_group, cur_idx; int max_gpr_group, max_gpr_idx; int max_gpr_tp_avg, max_gpr_prob; - cur_group = index / MCS_GROUP_RATES; - cur_idx = index % MCS_GROUP_RATES; - mg = &mi->groups[index / MCS_GROUP_RATES]; - mrs = &mg->rates[index % MCS_GROUP_RATES]; + cur_group = MI_RATE_GROUP(index); + cur_idx = MI_RATE_IDX(index); + mg = &mi->groups[cur_group]; + mrs = &mg->rates[cur_idx]; - tmp_group = mi->max_prob_rate / MCS_GROUP_RATES; - tmp_idx = mi->max_prob_rate % MCS_GROUP_RATES; + tmp_group = MI_RATE_GROUP(*dest); + tmp_idx = MI_RATE_IDX(*dest); tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; tmp_tp_avg = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob); /* if max_tp_rate[0] is from MCS_GROUP max_prob_rate get selected from * MCS_GROUP as well as CCK_GROUP rates do not allow aggregation */ - max_tp_group = mi->max_tp_rate[0] / MCS_GROUP_RATES; - if((index / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) && - (max_tp_group != MINSTREL_CCK_GROUP)) + max_tp_group = MI_RATE_GROUP(mi->max_tp_rate[0]); + max_tp_idx = MI_RATE_IDX(mi->max_tp_rate[0]); + max_tp_prob = mi->groups[max_tp_group].rates[max_tp_idx].prob_avg; + + if (minstrel_ht_is_legacy_group(MI_RATE_GROUP(index)) && + !minstrel_ht_is_legacy_group(max_tp_group)) + return; + + /* skip rates faster than max tp rate with lower prob */ + if (minstrel_get_duration(mi->max_tp_rate[0]) > minstrel_get_duration(index) && + mrs->prob_avg < max_tp_prob) return; - max_gpr_group = mg->max_group_prob_rate / MCS_GROUP_RATES; - max_gpr_idx = mg->max_group_prob_rate % MCS_GROUP_RATES; + max_gpr_group = MI_RATE_GROUP(mg->max_group_prob_rate); + max_gpr_idx = MI_RATE_IDX(mg->max_group_prob_rate); max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_avg; if (mrs->prob_avg > MINSTREL_FRAC(75, 100)) { cur_tp_avg = minstrel_ht_get_tp_avg(mi, cur_group, cur_idx, mrs->prob_avg); if (cur_tp_avg > tmp_tp_avg) - mi->max_prob_rate = index; + *dest = index; max_gpr_tp_avg = minstrel_ht_get_tp_avg(mi, max_gpr_group, max_gpr_idx, @@ -459,7 +623,7 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index) mg->max_group_prob_rate = index; } else { if (mrs->prob_avg > tmp_prob) - mi->max_prob_rate = index; + *dest = index; if (mrs->prob_avg > max_gpr_prob) mg->max_group_prob_rate = index; } @@ -475,24 +639,24 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index) static void minstrel_ht_assign_best_tp_rates(struct minstrel_ht_sta *mi, u16 tmp_mcs_tp_rate[MAX_THR_RATES], - u16 tmp_cck_tp_rate[MAX_THR_RATES]) + u16 tmp_legacy_tp_rate[MAX_THR_RATES]) { unsigned int tmp_group, tmp_idx, tmp_cck_tp, tmp_mcs_tp, tmp_prob; int i; - tmp_group = tmp_cck_tp_rate[0] / MCS_GROUP_RATES; - tmp_idx = tmp_cck_tp_rate[0] % MCS_GROUP_RATES; + tmp_group = MI_RATE_GROUP(tmp_legacy_tp_rate[0]); + tmp_idx = MI_RATE_IDX(tmp_legacy_tp_rate[0]); tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; tmp_cck_tp = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob); - tmp_group = tmp_mcs_tp_rate[0] / MCS_GROUP_RATES; - tmp_idx = tmp_mcs_tp_rate[0] % MCS_GROUP_RATES; + tmp_group = MI_RATE_GROUP(tmp_mcs_tp_rate[0]); + tmp_idx = MI_RATE_IDX(tmp_mcs_tp_rate[0]); tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; tmp_mcs_tp = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob); - if (tmp_cck_tp_rate && tmp_cck_tp > tmp_mcs_tp) { + if (tmp_cck_tp > tmp_mcs_tp) { for(i = 0; i < MAX_THR_RATES; i++) { - minstrel_ht_sort_best_tp_rates(mi, tmp_cck_tp_rate[i], + minstrel_ht_sort_best_tp_rates(mi, tmp_legacy_tp_rate[i], tmp_mcs_tp_rate); } } @@ -510,14 +674,17 @@ minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi) int tmp_max_streams, group, tmp_idx, tmp_prob; int tmp_tp = 0; - tmp_max_streams = minstrel_mcs_groups[mi->max_tp_rate[0] / - MCS_GROUP_RATES].streams; + if (!mi->sta->deflink.ht_cap.ht_supported) + return; + + group = MI_RATE_GROUP(mi->max_tp_rate[0]); + tmp_max_streams = minstrel_mcs_groups[group].streams; for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) { mg = &mi->groups[group]; if (!mi->supported[group] || group == MINSTREL_CCK_GROUP) continue; - tmp_idx = mg->max_group_prob_rate % MCS_GROUP_RATES; + tmp_idx = MI_RATE_IDX(mg->max_group_prob_rate); tmp_prob = mi->groups[group].rates[tmp_idx].prob_avg; if (tmp_tp < minstrel_ht_get_tp_avg(mi, group, tmp_idx, tmp_prob) && @@ -530,133 +697,355 @@ minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi) } } +static u16 +__minstrel_ht_get_sample_rate(struct minstrel_ht_sta *mi, + enum minstrel_sample_type type) +{ + u16 *rates = mi->sample[type].sample_rates; + u16 cur; + int i; + + for (i = 0; i < MINSTREL_SAMPLE_RATES; i++) { + if (!rates[i]) + continue; + + cur = rates[i]; + rates[i] = 0; + return cur; + } + + return 0; +} + static inline int -minstrel_get_duration(int index) +minstrel_ewma(int old, int new, int weight) { - const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES]; - unsigned int duration = group->duration[index % MCS_GROUP_RATES]; - return duration << group->shift; + int diff, incr; + + diff = new - old; + incr = (EWMA_DIV - weight) * diff / EWMA_DIV; + + return old + incr; } -static bool -minstrel_ht_probe_group(struct minstrel_ht_sta *mi, const struct mcs_group *tp_group, - int tp_idx, const struct mcs_group *group) +static inline int minstrel_filter_avg_add(u16 *prev_1, u16 *prev_2, s32 in) { - if (group->bw < tp_group->bw) - return false; + s32 out_1 = *prev_1; + s32 out_2 = *prev_2; + s32 val; - if (group->streams == tp_group->streams) - return true; + if (!in) + in += 1; - if (tp_idx < 4 && group->streams == tp_group->streams - 1) - return true; + if (!out_1) { + val = out_1 = in; + goto out; + } - return group->streams == tp_group->streams + 1; + val = MINSTREL_AVG_COEFF1 * in; + val += MINSTREL_AVG_COEFF2 * out_1; + val += MINSTREL_AVG_COEFF3 * out_2; + val >>= MINSTREL_SCALE; + + if (val > 1 << MINSTREL_SCALE) + val = 1 << MINSTREL_SCALE; + if (val < 0) + val = 1; + +out: + *prev_2 = out_1; + *prev_1 = val; + + return val; } +/* +* Recalculate statistics and counters of a given rate +*/ static void -minstrel_ht_find_probe_rates(struct minstrel_ht_sta *mi, u16 *rates, int *n_rates, - bool faster_rate) +minstrel_ht_calc_rate_stats(struct minstrel_priv *mp, + struct minstrel_rate_stats *mrs) { - const struct mcs_group *group, *tp_group; - int i, g, max_dur; - int tp_idx; + unsigned int cur_prob; + + if (unlikely(mrs->attempts > 0)) { + cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts); + minstrel_filter_avg_add(&mrs->prob_avg, + &mrs->prob_avg_1, cur_prob); + mrs->att_hist += mrs->attempts; + mrs->succ_hist += mrs->success; + } - tp_group = &minstrel_mcs_groups[mi->max_tp_rate[0] / MCS_GROUP_RATES]; - tp_idx = mi->max_tp_rate[0] % MCS_GROUP_RATES; + mrs->last_success = mrs->success; + mrs->last_attempts = mrs->attempts; + mrs->success = 0; + mrs->attempts = 0; +} - max_dur = minstrel_get_duration(mi->max_tp_rate[0]); - if (faster_rate) - max_dur -= max_dur / 16; +static bool +minstrel_ht_find_sample_rate(struct minstrel_ht_sta *mi, int type, int idx) +{ + int i; - for (g = 0; g < MINSTREL_GROUPS_NB; g++) { - u16 supported = mi->supported[g]; + for (i = 0; i < MINSTREL_SAMPLE_RATES; i++) { + u16 cur = mi->sample[type].sample_rates[i]; - if (!supported) - continue; + if (cur == idx) + return true; - group = &minstrel_mcs_groups[g]; - if (!minstrel_ht_probe_group(mi, tp_group, tp_idx, group)) - continue; + if (!cur) + break; + } - for (i = 0; supported; supported >>= 1, i++) { - int idx; + return false; +} - if (!(supported & 1)) - continue; +static int +minstrel_ht_move_sample_rates(struct minstrel_ht_sta *mi, int type, + u32 fast_rate_dur, u32 slow_rate_dur) +{ + u16 *rates = mi->sample[type].sample_rates; + int i, j; - if ((group->duration[i] << group->shift) > max_dur) - continue; + for (i = 0, j = 0; i < MINSTREL_SAMPLE_RATES; i++) { + u32 duration; + bool valid = false; + u16 cur; - idx = g * MCS_GROUP_RATES + i; - if (idx == mi->max_tp_rate[0]) - continue; + cur = rates[i]; + if (!cur) + continue; - rates[(*n_rates)++] = idx; + duration = minstrel_get_duration(cur); + switch (type) { + case MINSTREL_SAMPLE_TYPE_SLOW: + valid = duration > fast_rate_dur && + duration < slow_rate_dur; + break; + case MINSTREL_SAMPLE_TYPE_INC: + case MINSTREL_SAMPLE_TYPE_JUMP: + valid = duration < fast_rate_dur; + break; + default: + valid = false; break; } + + if (!valid) { + rates[i] = 0; + continue; + } + + if (i == j) + continue; + + rates[j++] = cur; + rates[i] = 0; } + + return j; } -static void -minstrel_ht_rate_sample_switch(struct minstrel_priv *mp, - struct minstrel_ht_sta *mi) +static int +minstrel_ht_group_min_rate_offset(struct minstrel_ht_sta *mi, int group, + u32 max_duration) { - struct minstrel_rate_stats *mrs; - u16 rates[MINSTREL_GROUPS_NB]; - int n_rates = 0; - int probe_rate = 0; - bool faster_rate; + u16 supported = mi->supported[group]; int i; - u8 random; - /* - * Use rate switching instead of probing packets for devices with - * little control over retry fallback behavior - */ - if (mp->hw->max_rates > 1) - return; + for (i = 0; i < MCS_GROUP_RATES && supported; i++, supported >>= 1) { + if (!(supported & BIT(0))) + continue; - /* - * If the current EWMA prob is >75%, look for a rate that's 6.25% - * faster than the max tp rate. - * If that fails, look again for a rate that is at least as fast - */ - mrs = minstrel_get_ratestats(mi, mi->max_tp_rate[0]); - faster_rate = mrs->prob_avg > MINSTREL_FRAC(75, 100); - minstrel_ht_find_probe_rates(mi, rates, &n_rates, faster_rate); - if (!n_rates && faster_rate) - minstrel_ht_find_probe_rates(mi, rates, &n_rates, false); - - /* If no suitable rate was found, try to pick the next one in the group */ - if (!n_rates) { - int g_idx = mi->max_tp_rate[0] / MCS_GROUP_RATES; - u16 supported = mi->supported[g_idx]; - - supported >>= mi->max_tp_rate[0] % MCS_GROUP_RATES; - for (i = 0; supported; supported >>= 1, i++) { - if (!(supported & 1)) - continue; + if (minstrel_get_duration(MI_RATE(group, i)) >= max_duration) + continue; + + return i; + } + + return -1; +} - probe_rate = mi->max_tp_rate[0] + i; +/* + * Incremental update rates: + * Flip through groups and pick the first group rate that is faster than the + * highest currently selected rate + */ +static u16 +minstrel_ht_next_inc_rate(struct minstrel_ht_sta *mi, u32 fast_rate_dur) +{ + u8 type = MINSTREL_SAMPLE_TYPE_INC; + int i, index = 0; + u8 group; + + group = mi->sample[type].sample_group; + for (i = 0; i < ARRAY_SIZE(minstrel_mcs_groups); i++) { + group = (group + 1) % ARRAY_SIZE(minstrel_mcs_groups); + + index = minstrel_ht_group_min_rate_offset(mi, group, + fast_rate_dur); + if (index < 0) + continue; + + index = MI_RATE(group, index & 0xf); + if (!minstrel_ht_find_sample_rate(mi, type, index)) goto out; + } + index = 0; + +out: + mi->sample[type].sample_group = group; + + return index; +} + +static int +minstrel_ht_next_group_sample_rate(struct minstrel_ht_sta *mi, int group, + u16 supported, int offset) +{ + struct minstrel_mcs_group_data *mg = &mi->groups[group]; + u16 idx; + int i; + + for (i = 0; i < MCS_GROUP_RATES; i++) { + idx = sample_table[mg->column][mg->index]; + if (++mg->index >= MCS_GROUP_RATES) { + mg->index = 0; + if (++mg->column >= ARRAY_SIZE(sample_table)) + mg->column = 0; } - return; + if (idx < offset) + continue; + + if (!(supported & BIT(idx))) + continue; + + return MI_RATE(group, idx); } - i = 0; - if (n_rates > 1) { - random = prandom_u32(); - i = random % n_rates; + return -1; +} + +/* + * Jump rates: + * Sample random rates, use those that are faster than the highest + * currently selected rate. Rates between the fastest and the slowest + * get sorted into the slow sample bucket, but only if it has room + */ +static u16 +minstrel_ht_next_jump_rate(struct minstrel_ht_sta *mi, u32 fast_rate_dur, + u32 slow_rate_dur, int *slow_rate_ofs) +{ + struct minstrel_rate_stats *mrs; + u32 max_duration = slow_rate_dur; + int i, index, offset; + u16 *slow_rates; + u16 supported; + u32 duration; + u8 group; + + if (*slow_rate_ofs >= MINSTREL_SAMPLE_RATES) + max_duration = fast_rate_dur; + + slow_rates = mi->sample[MINSTREL_SAMPLE_TYPE_SLOW].sample_rates; + group = mi->sample[MINSTREL_SAMPLE_TYPE_JUMP].sample_group; + for (i = 0; i < ARRAY_SIZE(minstrel_mcs_groups); i++) { + u8 type; + + group = (group + 1) % ARRAY_SIZE(minstrel_mcs_groups); + + supported = mi->supported[group]; + if (!supported) + continue; + + offset = minstrel_ht_group_min_rate_offset(mi, group, + max_duration); + if (offset < 0) + continue; + + index = minstrel_ht_next_group_sample_rate(mi, group, supported, + offset); + if (index < 0) + continue; + + duration = minstrel_get_duration(index); + if (duration < fast_rate_dur) + type = MINSTREL_SAMPLE_TYPE_JUMP; + else + type = MINSTREL_SAMPLE_TYPE_SLOW; + + if (minstrel_ht_find_sample_rate(mi, type, index)) + continue; + + if (type == MINSTREL_SAMPLE_TYPE_JUMP) + goto found; + + if (*slow_rate_ofs >= MINSTREL_SAMPLE_RATES) + continue; + + if (duration >= slow_rate_dur) + continue; + + /* skip slow rates with high success probability */ + mrs = minstrel_get_ratestats(mi, index); + if (mrs->prob_avg > MINSTREL_FRAC(95, 100)) + continue; + + slow_rates[(*slow_rate_ofs)++] = index; + if (*slow_rate_ofs >= MINSTREL_SAMPLE_RATES) + max_duration = fast_rate_dur; } - probe_rate = rates[i]; + index = 0; -out: - mi->sample_rate = probe_rate; - mi->sample_mode = MINSTREL_SAMPLE_ACTIVE; +found: + mi->sample[MINSTREL_SAMPLE_TYPE_JUMP].sample_group = group; + + return index; +} + +static void +minstrel_ht_refill_sample_rates(struct minstrel_ht_sta *mi) +{ + u32 prob_dur = minstrel_get_duration(mi->max_prob_rate); + u32 tp_dur = minstrel_get_duration(mi->max_tp_rate[0]); + u32 tp2_dur = minstrel_get_duration(mi->max_tp_rate[1]); + u32 fast_rate_dur = min(min(tp_dur, tp2_dur), prob_dur); + u32 slow_rate_dur = max(max(tp_dur, tp2_dur), prob_dur); + u16 *rates; + int i, j; + + rates = mi->sample[MINSTREL_SAMPLE_TYPE_INC].sample_rates; + i = minstrel_ht_move_sample_rates(mi, MINSTREL_SAMPLE_TYPE_INC, + fast_rate_dur, slow_rate_dur); + while (i < MINSTREL_SAMPLE_RATES) { + rates[i] = minstrel_ht_next_inc_rate(mi, tp_dur); + if (!rates[i]) + break; + + i++; + } + + rates = mi->sample[MINSTREL_SAMPLE_TYPE_JUMP].sample_rates; + i = minstrel_ht_move_sample_rates(mi, MINSTREL_SAMPLE_TYPE_JUMP, + fast_rate_dur, slow_rate_dur); + j = minstrel_ht_move_sample_rates(mi, MINSTREL_SAMPLE_TYPE_SLOW, + fast_rate_dur, slow_rate_dur); + while (i < MINSTREL_SAMPLE_RATES) { + rates[i] = minstrel_ht_next_jump_rate(mi, fast_rate_dur, + slow_rate_dur, &j); + if (!rates[i]) + break; + + i++; + } + + for (i = 0; i < ARRAY_SIZE(mi->sample); i++) + memcpy(mi->sample[i].cur_sample_rates, mi->sample[i].sample_rates, + sizeof(mi->sample[i].cur_sample_rates)); } + /* * Update rate statistics and select new primary rates * @@ -667,26 +1056,15 @@ out: * higher throughput rates, even if the probablity is a bit lower */ static void -minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, - bool sample) +minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) { struct minstrel_mcs_group_data *mg; struct minstrel_rate_stats *mrs; int group, i, j, cur_prob; u16 tmp_mcs_tp_rate[MAX_THR_RATES], tmp_group_tp_rate[MAX_THR_RATES]; - u16 tmp_cck_tp_rate[MAX_THR_RATES], index; - - mi->sample_mode = MINSTREL_SAMPLE_IDLE; - - if (sample) { - mi->total_packets_cur = mi->total_packets - - mi->total_packets_last; - mi->total_packets_last = mi->total_packets; - } - if (!mp->sample_switch) - sample = false; - if (mi->total_packets_cur < SAMPLE_SWITCH_THR && mp->sample_switch != 1) - sample = false; + u16 tmp_legacy_tp_rate[MAX_THR_RATES], tmp_max_prob_rate; + u16 index; + bool ht_supported = mi->sta->deflink.ht_cap.ht_supported; if (mi->ampdu_packets > 0) { if (!ieee80211_hw_check(mp->hw, TX_STATUS_NO_AMPDU_LEN)) @@ -699,65 +1077,72 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, mi->ampdu_packets = 0; } - mi->sample_slow = 0; - mi->sample_count = 0; - - memset(tmp_mcs_tp_rate, 0, sizeof(tmp_mcs_tp_rate)); - memset(tmp_cck_tp_rate, 0, sizeof(tmp_cck_tp_rate)); if (mi->supported[MINSTREL_CCK_GROUP]) - for (j = 0; j < ARRAY_SIZE(tmp_cck_tp_rate); j++) - tmp_cck_tp_rate[j] = MINSTREL_CCK_GROUP * MCS_GROUP_RATES; + group = MINSTREL_CCK_GROUP; + else if (mi->supported[MINSTREL_OFDM_GROUP]) + group = MINSTREL_OFDM_GROUP; + else + group = 0; + + index = MI_RATE(group, 0); + for (j = 0; j < ARRAY_SIZE(tmp_legacy_tp_rate); j++) + tmp_legacy_tp_rate[j] = index; if (mi->supported[MINSTREL_VHT_GROUP_0]) - index = MINSTREL_VHT_GROUP_0 * MCS_GROUP_RATES; + group = MINSTREL_VHT_GROUP_0; + else if (ht_supported) + group = MINSTREL_HT_GROUP_0; + else if (mi->supported[MINSTREL_CCK_GROUP]) + group = MINSTREL_CCK_GROUP; else - index = MINSTREL_HT_GROUP_0 * MCS_GROUP_RATES; + group = MINSTREL_OFDM_GROUP; + index = MI_RATE(group, 0); + tmp_max_prob_rate = index; for (j = 0; j < ARRAY_SIZE(tmp_mcs_tp_rate); j++) tmp_mcs_tp_rate[j] = index; /* Find best rate sets within all MCS groups*/ for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) { + u16 *tp_rate = tmp_mcs_tp_rate; + u16 last_prob = 0; mg = &mi->groups[group]; if (!mi->supported[group]) continue; - mi->sample_count++; - /* (re)Initialize group rate indexes */ for(j = 0; j < MAX_THR_RATES; j++) - tmp_group_tp_rate[j] = MCS_GROUP_RATES * group; + tmp_group_tp_rate[j] = MI_RATE(group, 0); - for (i = 0; i < MCS_GROUP_RATES; i++) { + if (group == MINSTREL_CCK_GROUP && ht_supported) + tp_rate = tmp_legacy_tp_rate; + + for (i = MCS_GROUP_RATES - 1; i >= 0; i--) { if (!(mi->supported[group] & BIT(i))) continue; - index = MCS_GROUP_RATES * group + i; + index = MI_RATE(group, i); mrs = &mg->rates[i]; mrs->retry_updated = false; - minstrel_calc_rate_stats(mp, mrs); + minstrel_ht_calc_rate_stats(mp, mrs); + + if (mrs->att_hist) + last_prob = max(last_prob, mrs->prob_avg); + else + mrs->prob_avg = max(last_prob, mrs->prob_avg); cur_prob = mrs->prob_avg; if (minstrel_ht_get_tp_avg(mi, group, i, cur_prob) == 0) continue; /* Find max throughput rate set */ - if (group != MINSTREL_CCK_GROUP) { - minstrel_ht_sort_best_tp_rates(mi, index, - tmp_mcs_tp_rate); - } else if (group == MINSTREL_CCK_GROUP) { - minstrel_ht_sort_best_tp_rates(mi, index, - tmp_cck_tp_rate); - } + minstrel_ht_sort_best_tp_rates(mi, index, tp_rate); /* Find max throughput rate set within a group */ minstrel_ht_sort_best_tp_rates(mi, index, tmp_group_tp_rate); - - /* Find max probability rate per group and global */ - minstrel_ht_set_best_prob_rate(mi, index); } memcpy(mg->max_group_tp_rate, tmp_group_tp_rate, @@ -765,19 +1150,34 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, } /* Assign new rate set per sta */ - minstrel_ht_assign_best_tp_rates(mi, tmp_mcs_tp_rate, tmp_cck_tp_rate); + minstrel_ht_assign_best_tp_rates(mi, tmp_mcs_tp_rate, + tmp_legacy_tp_rate); memcpy(mi->max_tp_rate, tmp_mcs_tp_rate, sizeof(mi->max_tp_rate)); - /* Try to increase robustness of max_prob_rate*/ - minstrel_ht_prob_rate_reduce_streams(mi); + for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) { + if (!mi->supported[group]) + continue; + + mg = &mi->groups[group]; + mg->max_group_prob_rate = MI_RATE(group, 0); + + for (i = 0; i < MCS_GROUP_RATES; i++) { + if (!(mi->supported[group] & BIT(i))) + continue; + + index = MI_RATE(group, i); + + /* Find max probability rate per group and global */ + minstrel_ht_set_best_prob_rate(mi, &tmp_max_prob_rate, + index); + } + } - /* try to sample all available rates during each interval */ - mi->sample_count *= 8; - if (mp->new_avg) - mi->sample_count /= 2; + mi->max_prob_rate = tmp_max_prob_rate; - if (sample) - minstrel_ht_rate_sample_switch(mp, mi); + /* Try to increase robustness of max_prob_rate*/ + minstrel_ht_prob_rate_reduce_streams(mi); + minstrel_ht_refill_sample_rates(mi); #ifdef CONFIG_MAC80211_DEBUGFS /* use fixed index if set */ @@ -785,17 +1185,20 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, for (i = 0; i < 4; i++) mi->max_tp_rate[i] = mp->fixed_rate_idx; mi->max_prob_rate = mp->fixed_rate_idx; - mi->sample_mode = MINSTREL_SAMPLE_IDLE; } #endif /* Reset update timer */ mi->last_stats_update = jiffies; + mi->sample_time = jiffies; } static bool -minstrel_ht_txstat_valid(struct minstrel_priv *mp, struct ieee80211_tx_rate *rate) +minstrel_ht_txstat_valid(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, + struct ieee80211_tx_rate *rate) { + int i; + if (rate->idx < 0) return false; @@ -806,32 +1209,49 @@ minstrel_ht_txstat_valid(struct minstrel_priv *mp, struct ieee80211_tx_rate *rat rate->flags & IEEE80211_TX_RC_VHT_MCS) return true; - return rate->idx == mp->cck_rates[0] || - rate->idx == mp->cck_rates[1] || - rate->idx == mp->cck_rates[2] || - rate->idx == mp->cck_rates[3]; + for (i = 0; i < ARRAY_SIZE(mp->cck_rates); i++) + if (rate->idx == mp->cck_rates[i]) + return true; + + for (i = 0; i < ARRAY_SIZE(mp->ofdm_rates[0]); i++) + if (rate->idx == mp->ofdm_rates[mi->band][i]) + return true; + + return false; } -static void -minstrel_set_next_sample_idx(struct minstrel_ht_sta *mi) +/* + * Check whether rate_status contains valid information. + */ +static bool +minstrel_ht_ri_txstat_valid(struct minstrel_priv *mp, + struct minstrel_ht_sta *mi, + struct ieee80211_rate_status *rate_status) { - struct minstrel_mcs_group_data *mg; + int i; - for (;;) { - mi->sample_group++; - mi->sample_group %= ARRAY_SIZE(minstrel_mcs_groups); - mg = &mi->groups[mi->sample_group]; + if (!rate_status) + return false; + if (!rate_status->try_count) + return false; - if (!mi->supported[mi->sample_group]) - continue; + if (rate_status->rate_idx.flags & RATE_INFO_FLAGS_MCS || + rate_status->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS) + return true; - if (++mg->index >= MCS_GROUP_RATES) { - mg->index = 0; - if (++mg->column >= ARRAY_SIZE(sample_table)) - mg->column = 0; - } - break; + for (i = 0; i < ARRAY_SIZE(mp->cck_rates); i++) { + if (rate_status->rate_idx.legacy == + minstrel_cck_bitrates[ mp->cck_rates[i] ]) + return true; + } + + for (i = 0; i < ARRAY_SIZE(mp->ofdm_rates); i++) { + if (rate_status->rate_idx.legacy == + minstrel_ofdm_bitrates[ mp->ofdm_rates[mi->band][i] ]) + return true; } + + return false; } static void @@ -839,7 +1259,7 @@ minstrel_downgrade_rate(struct minstrel_ht_sta *mi, u16 *idx, bool primary) { int group, orig_group; - orig_group = group = *idx / MCS_GROUP_RATES; + orig_group = group = MI_RATE_GROUP(*idx); while (group > 0) { group--; @@ -859,47 +1279,21 @@ minstrel_downgrade_rate(struct minstrel_ht_sta *mi, u16 *idx, bool primary) } static void -minstrel_aggr_check(struct ieee80211_sta *pubsta, struct sk_buff *skb) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - struct sta_info *sta = container_of(pubsta, struct sta_info, sta); - u16 tid; - - if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO) - return; - - if (unlikely(!ieee80211_is_data_qos(hdr->frame_control))) - return; - - if (unlikely(skb->protocol == cpu_to_be16(ETH_P_PAE))) - return; - - tid = ieee80211_get_tid(hdr); - if (likely(sta->ampdu_mlme.tid_tx[tid])) - return; - - ieee80211_start_tx_ba_session(pubsta, tid, 0); -} - -static void minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband, void *priv_sta, struct ieee80211_tx_status *st) { struct ieee80211_tx_info *info = st->info; - struct minstrel_ht_sta_priv *msp = priv_sta; - struct minstrel_ht_sta *mi = &msp->ht; + struct minstrel_ht_sta *mi = priv_sta; struct ieee80211_tx_rate *ar = info->status.rates; - struct minstrel_rate_stats *rate, *rate2, *rate_sample = NULL; + struct minstrel_rate_stats *rate, *rate2; struct minstrel_priv *mp = priv; - u32 update_interval = mp->update_interval / 2; + u32 update_interval = mp->update_interval; bool last, update = false; - bool sample_status = false; int i; - if (!msp->is_ht) - return mac80211_minstrel.tx_status_ext(priv, sband, - &msp->legacy, st); - + /* Ignore packet that was sent with noAck flag */ + if (info->flags & IEEE80211_TX_CTL_NO_ACK) + return; /* This packet was aggregated but doesn't carry status info */ if ((info->flags & IEEE80211_TX_CTL_AMPDU) && @@ -912,64 +1306,49 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband, info->status.ampdu_len = 1; } - mi->ampdu_packets++; - mi->ampdu_len += info->status.ampdu_len; - - if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) { - int avg_ampdu_len = minstrel_ht_avg_ampdu_len(mi); - - mi->sample_wait = 16 + 2 * avg_ampdu_len; - mi->sample_tries = 1; - mi->sample_count--; + /* wraparound */ + if (mi->total_packets >= ~0 - info->status.ampdu_len) { + mi->total_packets = 0; + mi->sample_packets = 0; } + mi->total_packets += info->status.ampdu_len; if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) mi->sample_packets += info->status.ampdu_len; - if (mi->sample_mode != MINSTREL_SAMPLE_IDLE) - rate_sample = minstrel_get_ratestats(mi, mi->sample_rate); - - last = !minstrel_ht_txstat_valid(mp, &ar[0]); - for (i = 0; !last; i++) { - last = (i == IEEE80211_TX_MAX_RATES - 1) || - !minstrel_ht_txstat_valid(mp, &ar[i + 1]); - - rate = minstrel_ht_get_stats(mp, mi, &ar[i]); - if (rate == rate_sample) - sample_status = true; - - if (last) - rate->success += info->status.ampdu_ack_len; + mi->ampdu_packets++; + mi->ampdu_len += info->status.ampdu_len; - rate->attempts += ar[i].count * info->status.ampdu_len; - } + if (st->rates && st->n_rates) { + last = !minstrel_ht_ri_txstat_valid(mp, mi, &(st->rates[0])); + for (i = 0; !last; i++) { + last = (i == st->n_rates - 1) || + !minstrel_ht_ri_txstat_valid(mp, mi, + &(st->rates[i + 1])); - switch (mi->sample_mode) { - case MINSTREL_SAMPLE_IDLE: - if (mp->new_avg && - (mp->hw->max_rates > 1 || - mi->total_packets_cur < SAMPLE_SWITCH_THR)) - update_interval /= 2; - break; + rate = minstrel_ht_ri_get_stats(mp, mi, + &(st->rates[i])); - case MINSTREL_SAMPLE_ACTIVE: - if (!sample_status) - break; + if (last) + rate->success += info->status.ampdu_ack_len; - mi->sample_mode = MINSTREL_SAMPLE_PENDING; - update = true; - break; + rate->attempts += st->rates[i].try_count * + info->status.ampdu_len; + } + } else { + last = !minstrel_ht_txstat_valid(mp, mi, &ar[0]); + for (i = 0; !last; i++) { + last = (i == IEEE80211_TX_MAX_RATES - 1) || + !minstrel_ht_txstat_valid(mp, mi, &ar[i + 1]); - case MINSTREL_SAMPLE_PENDING: - if (sample_status) - break; + rate = minstrel_ht_get_stats(mp, mi, &ar[i]); + if (last) + rate->success += info->status.ampdu_ack_len; - update = true; - minstrel_ht_update_stats(mp, mi, false); - break; + rate->attempts += ar[i].count * info->status.ampdu_len; + } } - if (mp->hw->max_rates > 1) { /* * check for sudden death of spatial multiplexing, @@ -992,7 +1371,7 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband, if (time_after(jiffies, mi->last_stats_update + update_interval)) { update = true; - minstrel_ht_update_stats(mp, mi, true); + minstrel_ht_update_stats(mp, mi); } if (update) @@ -1030,7 +1409,10 @@ minstrel_calc_retransmit(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, ctime += (t_slot * cw) >> 1; cw = min((cw << 1) | 1, mp->cw_max); - if (index / MCS_GROUP_RATES != MINSTREL_CCK_GROUP) { + if (minstrel_ht_is_legacy_group(MI_RATE_GROUP(index))) { + overhead = mi->overhead_legacy; + overhead_rtscts = mi->overhead_legacy_rtscts; + } else { overhead = mi->overhead; overhead_rtscts = mi->overhead_rtscts; } @@ -1060,7 +1442,8 @@ static void minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, struct ieee80211_sta_rates *ratetbl, int offset, int index) { - const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES]; + int group_idx = MI_RATE_GROUP(index); + const struct mcs_group *group = &minstrel_mcs_groups[group_idx]; struct minstrel_rate_stats *mrs; u8 idx; u16 flags = group->flags; @@ -1079,20 +1462,24 @@ minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, ratetbl->rate[offset].count_rts = mrs->retry_count_rtscts; } - if (index / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) + index = MI_RATE_IDX(index); + if (group_idx == MINSTREL_CCK_GROUP) idx = mp->cck_rates[index % ARRAY_SIZE(mp->cck_rates)]; + else if (group_idx == MINSTREL_OFDM_GROUP) + idx = mp->ofdm_rates[mi->band][index % + ARRAY_SIZE(mp->ofdm_rates[0])]; else if (flags & IEEE80211_TX_RC_VHT_MCS) idx = ((group->streams - 1) << 4) | - ((index % MCS_GROUP_RATES) & 0xF); + (index & 0xF); else - idx = index % MCS_GROUP_RATES + (group->streams - 1) * 8; + idx = index + (group->streams - 1) * 8; /* enable RTS/CTS if needed: * - if station is in dynamic SMPS (and streams > 1) * - for fallback rates, to increase chances of getting through */ if (offset > 0 || - (mi->sta->smps_mode == IEEE80211_SMPS_DYNAMIC && + (mi->sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC && group->streams > 1)) { ratetbl->rate[offset].count = ratetbl->rate[offset].count_rts; flags |= IEEE80211_TX_RC_USE_RTS_CTS; @@ -1105,17 +1492,17 @@ minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, static inline int minstrel_ht_get_prob_avg(struct minstrel_ht_sta *mi, int rate) { - int group = rate / MCS_GROUP_RATES; - rate %= MCS_GROUP_RATES; + int group = MI_RATE_GROUP(rate); + rate = MI_RATE_IDX(rate); return mi->groups[group].rates[rate].prob_avg; } static int minstrel_ht_get_max_amsdu_len(struct minstrel_ht_sta *mi) { - int group = mi->max_prob_rate / MCS_GROUP_RATES; + int group = MI_RATE_GROUP(mi->max_prob_rate); const struct mcs_group *g = &minstrel_mcs_groups[group]; - int rate = mi->max_prob_rate % MCS_GROUP_RATES; + int rate = MI_RATE_IDX(mi->max_prob_rate); unsigned int duration; /* Disable A-MSDU if max_prob_rate is bad */ @@ -1152,7 +1539,7 @@ minstrel_ht_get_max_amsdu_len(struct minstrel_ht_sta *mi) * the limit here to avoid the complexity of having to de-aggregate * packets in the queue. */ - if (!mi->sta->vht_cap.vht_supported) + if (!mi->sta->deflink.vht_cap.vht_supported) return IEEE80211_MAX_MPDU_LEN_HT_BA; /* unlimited */ @@ -1163,129 +1550,45 @@ static void minstrel_ht_update_rates(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) { struct ieee80211_sta_rates *rates; - u16 first_rate = mi->max_tp_rate[0]; int i = 0; - - if (mi->sample_mode == MINSTREL_SAMPLE_ACTIVE) - first_rate = mi->sample_rate; + int max_rates = min_t(int, mp->hw->max_rates, IEEE80211_TX_RATE_TABLE_SIZE); rates = kzalloc(sizeof(*rates), GFP_ATOMIC); if (!rates) return; /* Start with max_tp_rate[0] */ - minstrel_ht_set_rate(mp, mi, rates, i++, first_rate); + minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_tp_rate[0]); - if (mp->hw->max_rates >= 3) { - /* At least 3 tx rates supported, use max_tp_rate[1] next */ - minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_tp_rate[1]); - } + /* Fill up remaining, keep one entry for max_probe_rate */ + for (; i < (max_rates - 1); i++) + minstrel_ht_set_rate(mp, mi, rates, i, mi->max_tp_rate[i]); - if (mp->hw->max_rates >= 2) { + if (i < max_rates) minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_prob_rate); - } - mi->sta->max_rc_amsdu_len = minstrel_ht_get_max_amsdu_len(mi); - rates->rate[i].idx = -1; + if (i < IEEE80211_TX_RATE_TABLE_SIZE) + rates->rate[i].idx = -1; + + mi->sta->deflink.agg.max_rc_amsdu_len = minstrel_ht_get_max_amsdu_len(mi); + ieee80211_sta_recalc_aggregates(mi->sta); rate_control_set_rates(mp->hw, mi->sta, rates); } -static int -minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) +static u16 +minstrel_ht_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) { - struct minstrel_rate_stats *mrs; - struct minstrel_mcs_group_data *mg; - unsigned int sample_dur, sample_group, cur_max_tp_streams; - int tp_rate1, tp_rate2; - int sample_idx = 0; - - if (mp->hw->max_rates == 1 && mp->sample_switch && - (mi->total_packets_cur >= SAMPLE_SWITCH_THR || - mp->sample_switch == 1)) - return -1; - - if (mi->sample_wait > 0) { - mi->sample_wait--; - return -1; - } - - if (!mi->sample_tries) - return -1; - - sample_group = mi->sample_group; - mg = &mi->groups[sample_group]; - sample_idx = sample_table[mg->column][mg->index]; - minstrel_set_next_sample_idx(mi); - - if (!(mi->supported[sample_group] & BIT(sample_idx))) - return -1; - - mrs = &mg->rates[sample_idx]; - sample_idx += sample_group * MCS_GROUP_RATES; + u8 seq; - /* Set tp_rate1, tp_rate2 to the highest / second highest max_tp_rate */ - if (minstrel_get_duration(mi->max_tp_rate[0]) > - minstrel_get_duration(mi->max_tp_rate[1])) { - tp_rate1 = mi->max_tp_rate[1]; - tp_rate2 = mi->max_tp_rate[0]; + if (mp->hw->max_rates > 1) { + seq = mi->sample_seq; + mi->sample_seq = (seq + 1) % ARRAY_SIZE(minstrel_sample_seq); + seq = minstrel_sample_seq[seq]; } else { - tp_rate1 = mi->max_tp_rate[0]; - tp_rate2 = mi->max_tp_rate[1]; + seq = MINSTREL_SAMPLE_TYPE_INC; } - /* - * Sampling might add some overhead (RTS, no aggregation) - * to the frame. Hence, don't use sampling for the highest currently - * used highest throughput or probability rate. - */ - if (sample_idx == mi->max_tp_rate[0] || sample_idx == mi->max_prob_rate) - return -1; - - /* - * Do not sample if the probability is already higher than 95%, - * or if the rate is 3 times slower than the current max probability - * rate, to avoid wasting airtime. - */ - sample_dur = minstrel_get_duration(sample_idx); - if (mrs->prob_avg > MINSTREL_FRAC(95, 100) || - minstrel_get_duration(mi->max_prob_rate) * 3 < sample_dur) - return -1; - - - /* - * For devices with no configurable multi-rate retry, skip sampling - * below the per-group max throughput rate, and only use one sampling - * attempt per rate - */ - if (mp->hw->max_rates == 1 && - (minstrel_get_duration(mg->max_group_tp_rate[0]) < sample_dur || - mrs->attempts)) - return -1; - - /* Skip already sampled slow rates */ - if (sample_dur >= minstrel_get_duration(tp_rate1) && mrs->attempts) - return -1; - - /* - * Make sure that lower rates get sampled only occasionally, - * if the link is working perfectly. - */ - - cur_max_tp_streams = minstrel_mcs_groups[tp_rate1 / - MCS_GROUP_RATES].streams; - if (sample_dur >= minstrel_get_duration(tp_rate2) && - (cur_max_tp_streams - 1 < - minstrel_mcs_groups[sample_group].streams || - sample_dur >= minstrel_get_duration(mi->max_prob_rate))) { - if (mrs->sample_skipped < 20) - return -1; - - if (mi->sample_slow++ > 2) - return -1; - } - mi->sample_tries--; - - return sample_idx; + return __minstrel_ht_get_sample_rate(mi, seq); } static void @@ -1295,17 +1598,9 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, const struct mcs_group *sample_group; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb); struct ieee80211_tx_rate *rate = &info->status.rates[0]; - struct minstrel_ht_sta_priv *msp = priv_sta; - struct minstrel_ht_sta *mi = &msp->ht; + struct minstrel_ht_sta *mi = priv_sta; struct minstrel_priv *mp = priv; - int sample_idx; - - if (!msp->is_ht) - return mac80211_minstrel.get_rate(priv, sta, &msp->legacy, txrc); - - if (!(info->flags & IEEE80211_TX_CTL_AMPDU) && - mi->max_prob_rate / MCS_GROUP_RATES != MINSTREL_CCK_GROUP) - minstrel_aggr_check(sta, txrc->skb); + u16 sample_idx; info->flags |= mi->tx_flags; @@ -1317,23 +1612,18 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, /* Don't use EAPOL frames for sampling on non-mrr hw */ if (mp->hw->max_rates == 1 && (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) - sample_idx = -1; - else - sample_idx = minstrel_get_sample_rate(mp, mi); - - mi->total_packets++; + return; - /* wraparound */ - if (mi->total_packets == ~0) { - mi->total_packets = 0; - mi->sample_packets = 0; - } + if (time_is_after_jiffies(mi->sample_time)) + return; - if (sample_idx < 0) + mi->sample_time = jiffies + MINSTREL_SAMPLE_INTERVAL; + sample_idx = minstrel_ht_get_sample_rate(mp, mi); + if (!sample_idx) return; - sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES]; - sample_idx %= MCS_GROUP_RATES; + sample_group = &minstrel_mcs_groups[MI_RATE_GROUP(sample_idx)]; + sample_idx = MI_RATE_IDX(sample_idx); if (sample_group == &minstrel_mcs_groups[MINSTREL_CCK_GROUP] && (sample_idx >= 4) != txrc->short_preamble) @@ -1345,8 +1635,11 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, if (sample_group == &minstrel_mcs_groups[MINSTREL_CCK_GROUP]) { int idx = sample_idx % ARRAY_SIZE(mp->cck_rates); rate->idx = mp->cck_rates[idx]; + } else if (sample_group == &minstrel_mcs_groups[MINSTREL_OFDM_GROUP]) { + int idx = sample_idx % ARRAY_SIZE(mp->ofdm_rates[0]); + rate->idx = mp->ofdm_rates[mi->band][idx]; } else if (sample_group->flags & IEEE80211_TX_RC_VHT_MCS) { - ieee80211_rate_set_vht(rate, sample_idx % MCS_GROUP_RATES, + ieee80211_rate_set_vht(rate, MI_RATE_IDX(sample_idx), sample_group->streams); } else { rate->idx = sample_idx + (sample_group->streams - 1) * 8; @@ -1365,44 +1658,60 @@ minstrel_ht_update_cck(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, if (sband->band != NL80211_BAND_2GHZ) return; - if (!ieee80211_hw_check(mp->hw, SUPPORTS_HT_CCK_RATES)) + if (sta->deflink.ht_cap.ht_supported && + !ieee80211_hw_check(mp->hw, SUPPORTS_HT_CCK_RATES)) return; - mi->cck_supported = 0; - mi->cck_supported_short = 0; for (i = 0; i < 4; i++) { - if (!rate_supported(sta, sband->band, mp->cck_rates[i])) + if (mp->cck_rates[i] == 0xff || + !rate_supported(sta, sband->band, mp->cck_rates[i])) continue; - mi->cck_supported |= BIT(i); + mi->supported[MINSTREL_CCK_GROUP] |= BIT(i); if (sband->bitrates[i].flags & IEEE80211_RATE_SHORT_PREAMBLE) - mi->cck_supported_short |= BIT(i); + mi->supported[MINSTREL_CCK_GROUP] |= BIT(i + 4); } +} - mi->supported[MINSTREL_CCK_GROUP] = mi->cck_supported; +static void +minstrel_ht_update_ofdm(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, + struct ieee80211_supported_band *sband, + struct ieee80211_sta *sta) +{ + const u8 *rates; + int i; + + if (sta->deflink.ht_cap.ht_supported) + return; + + rates = mp->ofdm_rates[sband->band]; + for (i = 0; i < ARRAY_SIZE(mp->ofdm_rates[0]); i++) { + if (rates[i] == 0xff || + !rate_supported(sta, sband->band, rates[i])) + continue; + + mi->supported[MINSTREL_OFDM_GROUP] |= BIT(i); + } } static void minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, struct cfg80211_chan_def *chandef, - struct ieee80211_sta *sta, void *priv_sta) + struct ieee80211_sta *sta, void *priv_sta) { struct minstrel_priv *mp = priv; - struct minstrel_ht_sta_priv *msp = priv_sta; - struct minstrel_ht_sta *mi = &msp->ht; - struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs; - u16 ht_cap = sta->ht_cap.cap; - struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; + struct minstrel_ht_sta *mi = priv_sta; + struct ieee80211_mcs_info *mcs = &sta->deflink.ht_cap.mcs; + u16 ht_cap = sta->deflink.ht_cap.cap; + struct ieee80211_sta_vht_cap *vht_cap = &sta->deflink.vht_cap; + const struct ieee80211_rate *ctl_rate; + struct sta_info *sta_info; + bool ldpc, erp; int use_vht; int n_supported = 0; int ack_dur; int stbc; int i; - bool ldpc; - - /* fall back to the old minstrel for legacy stations */ - if (!sta->ht_cap.ht_supported) - goto use_legacy; BUILD_BUG_ON(ARRAY_SIZE(minstrel_mcs_groups) != MINSTREL_GROUPS_NB); @@ -1411,10 +1720,10 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, else use_vht = 0; - msp->is_ht = true; memset(mi, 0, sizeof(*mi)); mi->sta = sta; + mi->band = sband->band; mi->last_stats_update = jiffies; ack_dur = ieee80211_frame_duration(sband->band, 10, 60, 1, 1, 0); @@ -1422,17 +1731,15 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, mi->overhead += ack_dur; mi->overhead_rtscts = mi->overhead + 2 * ack_dur; - mi->avg_ampdu_len = MINSTREL_FRAC(1, 1); + ctl_rate = &sband->bitrates[rate_lowest_index(sband, sta)]; + erp = ctl_rate->flags & IEEE80211_RATE_ERP_G; + ack_dur = ieee80211_frame_duration(sband->band, 10, + ctl_rate->bitrate, erp, 1, + ieee80211_chandef_get_shift(chandef)); + mi->overhead_legacy = ack_dur; + mi->overhead_legacy_rtscts = mi->overhead_legacy + 2 * ack_dur; - /* When using MRR, sample more on the first attempt, without delay */ - if (mp->has_mrr) { - mi->sample_count = 16; - mi->sample_wait = 0; - } else { - mi->sample_count = 8; - mi->sample_wait = 8; - } - mi->sample_tries = 4; + mi->avg_ampdu_len = MINSTREL_FRAC(1, 1); if (!use_vht) { stbc = (ht_cap & IEEE80211_HT_CAP_RX_STBC) >> @@ -1455,10 +1762,8 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, int bw, nss; mi->supported[i] = 0; - if (i == MINSTREL_CCK_GROUP) { - minstrel_ht_update_cck(mp, mi, sband, sta); + if (minstrel_ht_is_legacy_group(i)) continue; - } if (gflags & IEEE80211_TX_RC_SHORT_GI) { if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) { @@ -1471,13 +1776,13 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, } if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH && - sta->bandwidth < IEEE80211_STA_RX_BW_40) + sta->deflink.bandwidth < IEEE80211_STA_RX_BW_40) continue; nss = minstrel_mcs_groups[i].streams; /* Mark MCS > 7 as unsupported if STA is in static SMPS mode */ - if (sta->smps_mode == IEEE80211_SMPS_STATIC && nss > 1) + if (sta->deflink.smps_mode == IEEE80211_SMPS_STATIC && nss > 1) continue; /* HT rate */ @@ -1498,7 +1803,7 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, continue; if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH) { - if (sta->bandwidth < IEEE80211_STA_RX_BW_80 || + if (sta->deflink.bandwidth < IEEE80211_STA_RX_BW_80 || ((gflags & IEEE80211_TX_RC_SHORT_GI) && !(vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80))) { continue; @@ -1519,24 +1824,16 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, n_supported++; } - if (!n_supported) - goto use_legacy; + sta_info = container_of(sta, struct sta_info, sta); + mi->use_short_preamble = test_sta_flag(sta_info, WLAN_STA_SHORT_PREAMBLE) && + sta_info->sdata->vif.bss_conf.use_short_preamble; - mi->supported[MINSTREL_CCK_GROUP] |= mi->cck_supported_short << 4; + minstrel_ht_update_cck(mp, mi, sband, sta); + minstrel_ht_update_ofdm(mp, mi, sband, sta); /* create an initial rate table with the lowest supported rates */ - minstrel_ht_update_stats(mp, mi, true); + minstrel_ht_update_stats(mp, mi); minstrel_ht_update_rates(mp, mi); - - return; - -use_legacy: - msp->is_ht = false; - memset(&msp->legacy, 0, sizeof(msp->legacy)); - msp->legacy.r = msp->ratelist; - msp->legacy.sample_table = msp->sample_table; - return mac80211_minstrel.rate_init(priv, sband, chandef, sta, - &msp->legacy); } static void @@ -1560,7 +1857,7 @@ static void * minstrel_ht_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp) { struct ieee80211_supported_band *sband; - struct minstrel_ht_sta_priv *msp; + struct minstrel_ht_sta *mi; struct minstrel_priv *mp = priv; struct ieee80211_hw *hw = mp->hw; int max_rates = 0; @@ -1572,91 +1869,91 @@ minstrel_ht_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp) max_rates = sband->n_bitrates; } - msp = kzalloc(sizeof(*msp), gfp); - if (!msp) - return NULL; - - msp->ratelist = kcalloc(max_rates, sizeof(struct minstrel_rate), gfp); - if (!msp->ratelist) - goto error; - - msp->sample_table = kmalloc_array(max_rates, SAMPLE_COLUMNS, gfp); - if (!msp->sample_table) - goto error1; - - return msp; - -error1: - kfree(msp->ratelist); -error: - kfree(msp); - return NULL; + return kzalloc(sizeof(*mi), gfp); } static void minstrel_ht_free_sta(void *priv, struct ieee80211_sta *sta, void *priv_sta) { - struct minstrel_ht_sta_priv *msp = priv_sta; - - kfree(msp->sample_table); - kfree(msp->ratelist); - kfree(msp); + kfree(priv_sta); } static void -minstrel_ht_init_cck_rates(struct minstrel_priv *mp) +minstrel_ht_fill_rate_array(u8 *dest, struct ieee80211_supported_band *sband, + const s16 *bitrates, int n_rates, u32 rate_flags) { - static const int bitrates[4] = { 10, 20, 55, 110 }; - struct ieee80211_supported_band *sband; - u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef); int i, j; - sband = mp->hw->wiphy->bands[NL80211_BAND_2GHZ]; - if (!sband) - return; - for (i = 0; i < sband->n_bitrates; i++) { struct ieee80211_rate *rate = &sband->bitrates[i]; - if (rate->flags & IEEE80211_RATE_ERP_G) - continue; - if ((rate_flags & sband->bitrates[i].flags) != rate_flags) continue; - for (j = 0; j < ARRAY_SIZE(bitrates); j++) { + for (j = 0; j < n_rates; j++) { if (rate->bitrate != bitrates[j]) continue; - mp->cck_rates[j] = i; + dest[j] = i; break; } } } +static void +minstrel_ht_init_cck_rates(struct minstrel_priv *mp) +{ + static const s16 bitrates[4] = { 10, 20, 55, 110 }; + struct ieee80211_supported_band *sband; + u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef); + + memset(mp->cck_rates, 0xff, sizeof(mp->cck_rates)); + sband = mp->hw->wiphy->bands[NL80211_BAND_2GHZ]; + if (!sband) + return; + + BUILD_BUG_ON(ARRAY_SIZE(mp->cck_rates) != ARRAY_SIZE(bitrates)); + minstrel_ht_fill_rate_array(mp->cck_rates, sband, + minstrel_cck_bitrates, + ARRAY_SIZE(minstrel_cck_bitrates), + rate_flags); +} + +static void +minstrel_ht_init_ofdm_rates(struct minstrel_priv *mp, enum nl80211_band band) +{ + static const s16 bitrates[8] = { 60, 90, 120, 180, 240, 360, 480, 540 }; + struct ieee80211_supported_band *sband; + u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef); + + memset(mp->ofdm_rates[band], 0xff, sizeof(mp->ofdm_rates[band])); + sband = mp->hw->wiphy->bands[band]; + if (!sband) + return; + + BUILD_BUG_ON(ARRAY_SIZE(mp->ofdm_rates[band]) != ARRAY_SIZE(bitrates)); + minstrel_ht_fill_rate_array(mp->ofdm_rates[band], sband, + minstrel_ofdm_bitrates, + ARRAY_SIZE(minstrel_ofdm_bitrates), + rate_flags); +} + static void * -minstrel_ht_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) +minstrel_ht_alloc(struct ieee80211_hw *hw) { struct minstrel_priv *mp; + int i; mp = kzalloc(sizeof(struct minstrel_priv), GFP_ATOMIC); if (!mp) return NULL; - mp->sample_switch = -1; - /* contention window settings * Just an approximation. Using the per-queue values would complicate * the calculations and is probably unnecessary */ mp->cw_min = 15; mp->cw_max = 1023; - /* number of packets (in %) to use for sampling other rates - * sample less often for non-mrr packets, because the overhead - * is much higher than with mrr */ - mp->lookaround_rate = 5; - mp->lookaround_rate_mrr = 10; - /* maximum time that the hw is allowed to stay in one MRR segment */ mp->segment_size = 6000; @@ -1670,23 +1967,26 @@ minstrel_ht_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) mp->has_mrr = true; mp->hw = hw; - mp->update_interval = HZ / 10; - mp->new_avg = true; + mp->update_interval = HZ / 20; + + minstrel_ht_init_cck_rates(mp); + for (i = 0; i < ARRAY_SIZE(mp->hw->wiphy->bands); i++) + minstrel_ht_init_ofdm_rates(mp, i); + + return mp; +} #ifdef CONFIG_MAC80211_DEBUGFS +static void minstrel_ht_add_debugfs(struct ieee80211_hw *hw, void *priv, + struct dentry *debugfsdir) +{ + struct minstrel_priv *mp = priv; + mp->fixed_rate_idx = (u32) -1; debugfs_create_u32("fixed_rate_idx", S_IRUGO | S_IWUGO, debugfsdir, &mp->fixed_rate_idx); - debugfs_create_u32("sample_switch", S_IRUGO | S_IWUSR, debugfsdir, - &mp->sample_switch); - debugfs_create_bool("new_avg", S_IRUGO | S_IWUSR, debugfsdir, - &mp->new_avg); -#endif - - minstrel_ht_init_cck_rates(mp); - - return mp; } +#endif static void minstrel_ht_free(void *priv) @@ -1696,15 +1996,11 @@ minstrel_ht_free(void *priv) static u32 minstrel_ht_get_expected_throughput(void *priv_sta) { - struct minstrel_ht_sta_priv *msp = priv_sta; - struct minstrel_ht_sta *mi = &msp->ht; + struct minstrel_ht_sta *mi = priv_sta; int i, j, prob, tp_avg; - if (!msp->is_ht) - return mac80211_minstrel.get_expected_throughput(priv_sta); - - i = mi->max_tp_rate[0] / MCS_GROUP_RATES; - j = mi->max_tp_rate[0] % MCS_GROUP_RATES; + i = MI_RATE_GROUP(mi->max_tp_rate[0]); + j = MI_RATE_IDX(mi->max_tp_rate[0]); prob = mi->groups[i].rates[j].prob_avg; /* convert tp_avg from pkt per second in kbps */ @@ -1716,6 +2012,7 @@ static u32 minstrel_ht_get_expected_throughput(void *priv_sta) static const struct rate_control_ops mac80211_minstrel_ht = { .name = "minstrel_ht", + .capa = RATE_CTRL_CAPA_AMPDU_TRIGGER, .tx_status_ext = minstrel_ht_tx_status, .get_rate = minstrel_ht_get_rate, .rate_init = minstrel_ht_rate_init, @@ -1725,6 +2022,7 @@ static const struct rate_control_ops mac80211_minstrel_ht = { .alloc = minstrel_ht_alloc, .free = minstrel_ht_free, #ifdef CONFIG_MAC80211_DEBUGFS + .add_debugfs = minstrel_ht_add_debugfs, .add_sta_debugfs = minstrel_ht_add_sta_debugfs, #endif .get_expected_throughput = minstrel_ht_get_expected_throughput, @@ -1738,7 +2036,7 @@ static void __init init_sample_table(void) memset(sample_table, 0xff, sizeof(sample_table)); for (col = 0; col < SAMPLE_COLUMNS; col++) { - prandom_bytes(rnd, sizeof(rnd)); + get_random_bytes(rnd, sizeof(rnd)); for (i = 0; i < MCS_GROUP_RATES; i++) { new_idx = (i + rnd[i]) % MCS_GROUP_RATES; while (sample_table[col][new_idx] != 0xff) |