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Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht.c')
-rw-r--r--net/mac80211/rc80211_minstrel_ht.c562
1 files changed, 375 insertions, 187 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index b11a2af55b06..bfa550068de4 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -13,7 +13,6 @@
#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
@@ -136,20 +135,16 @@
__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] = { \
@@ -163,10 +158,42 @@
}
#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);
@@ -203,6 +230,7 @@ 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),
@@ -235,6 +263,8 @@ 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 void
@@ -279,6 +309,13 @@ 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
*/
@@ -308,21 +345,34 @@ 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;
+ }
- for (idx = 0; idx < ARRAY_SIZE(mp->cck_rates); idx++)
- if (rate->idx == mp->cck_rates[idx])
- break;
+ group = MINSTREL_CCK_GROUP;
+ for (idx = 0; idx < ARRAY_SIZE(mp->cck_rates); idx++) {
+ 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;
+ 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];
}
@@ -332,13 +382,37 @@ minstrel_get_ratestats(struct minstrel_ht_sta *mi, int index)
return &mi->groups[index / MCS_GROUP_RATES].rates[index % MCS_GROUP_RATES];
}
+static inline int minstrel_get_duration(int index)
+{
+ 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;
+}
+
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->max_tp_rate[0] / MCS_GROUP_RATES))
+ 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;
}
/*
@@ -349,15 +423,19 @@ 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% */
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;
@@ -367,10 +445,9 @@ 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));
}
/*
@@ -417,12 +494,13 @@ 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;
@@ -431,16 +509,24 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index)
mg = &mi->groups[index / MCS_GROUP_RATES];
mrs = &mg->rates[index % MCS_GROUP_RATES];
- tmp_group = mi->max_prob_rate / MCS_GROUP_RATES;
- tmp_idx = mi->max_prob_rate % MCS_GROUP_RATES;
+ tmp_group = *dest / MCS_GROUP_RATES;
+ tmp_idx = *dest % MCS_GROUP_RATES;
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_idx = mi->max_tp_rate[0] % MCS_GROUP_RATES;
+ max_tp_prob = mi->groups[max_tp_group].rates[max_tp_idx].prob_avg;
+
+ if (minstrel_ht_is_legacy_group(index / MCS_GROUP_RATES) &&
+ !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;
@@ -451,7 +537,7 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index)
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,
@@ -460,7 +546,7 @@ 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;
}
@@ -476,13 +562,13 @@ 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 = tmp_legacy_tp_rate[0] / MCS_GROUP_RATES;
+ tmp_idx = tmp_legacy_tp_rate[0] % MCS_GROUP_RATES;
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);
@@ -493,7 +579,7 @@ minstrel_ht_assign_best_tp_rates(struct minstrel_ht_sta *mi,
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);
}
}
@@ -511,6 +597,9 @@ minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi)
int tmp_max_streams, group, tmp_idx, tmp_prob;
int tmp_tp = 0;
+ if (!mi->sta->ht_cap.ht_supported)
+ return;
+
tmp_max_streams = minstrel_mcs_groups[mi->max_tp_rate[0] /
MCS_GROUP_RATES].streams;
for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
@@ -531,14 +620,6 @@ minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi)
}
}
-static inline int
-minstrel_get_duration(int index)
-{
- 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;
-}
-
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)
@@ -658,6 +739,74 @@ out:
mi->sample_mode = MINSTREL_SAMPLE_ACTIVE;
}
+static inline int
+minstrel_ewma(int old, int new, int weight)
+{
+ int diff, incr;
+
+ diff = new - old;
+ incr = (EWMA_DIV - weight) * diff / EWMA_DIV;
+
+ return old + incr;
+}
+
+static inline int minstrel_filter_avg_add(u16 *prev_1, u16 *prev_2, s32 in)
+{
+ s32 out_1 = *prev_1;
+ s32 out_2 = *prev_2;
+ s32 val;
+
+ if (!in)
+ in += 1;
+
+ if (!out_1) {
+ val = out_1 = in;
+ goto out;
+ }
+
+ 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_calc_rate_stats(struct minstrel_priv *mp,
+ struct minstrel_rate_stats *mrs)
+{
+ unsigned int cur_prob;
+
+ if (unlikely(mrs->attempts > 0)) {
+ mrs->sample_skipped = 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;
+ } else {
+ mrs->sample_skipped++;
+ }
+
+ mrs->last_success = mrs->success;
+ mrs->last_attempts = mrs->attempts;
+ mrs->success = 0;
+ mrs->attempts = 0;
+}
+
/*
* Update rate statistics and select new primary rates
*
@@ -675,7 +824,9 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
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;
+ u16 tmp_legacy_tp_rate[MAX_THR_RATES], tmp_max_prob_rate;
+ u16 index;
+ bool ht_supported = mi->sta->ht_cap.ht_supported;
mi->sample_mode = MINSTREL_SAMPLE_IDLE;
@@ -704,21 +855,30 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
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));
+ memset(tmp_legacy_tp_rate, 0, sizeof(tmp_legacy_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;
+ for (j = 0; j < ARRAY_SIZE(tmp_legacy_tp_rate); j++)
+ tmp_legacy_tp_rate[j] = MINSTREL_CCK_GROUP * MCS_GROUP_RATES;
+ else if (mi->supported[MINSTREL_OFDM_GROUP])
+ for (j = 0; j < ARRAY_SIZE(tmp_legacy_tp_rate); j++)
+ tmp_legacy_tp_rate[j] = MINSTREL_OFDM_GROUP * MCS_GROUP_RATES;
if (mi->supported[MINSTREL_VHT_GROUP_0])
index = MINSTREL_VHT_GROUP_0 * MCS_GROUP_RATES;
- else
+ else if (ht_supported)
index = MINSTREL_HT_GROUP_0 * MCS_GROUP_RATES;
+ else if (mi->supported[MINSTREL_CCK_GROUP])
+ index = MINSTREL_CCK_GROUP * MCS_GROUP_RATES;
+ else
+ index = MINSTREL_OFDM_GROUP * MCS_GROUP_RATES;
+ 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;
mg = &mi->groups[group];
if (!mi->supported[group])
@@ -730,6 +890,9 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
for(j = 0; j < MAX_THR_RATES; j++)
tmp_group_tp_rate[j] = MCS_GROUP_RATES * group;
+ if (group == MINSTREL_CCK_GROUP && ht_supported)
+ tp_rate = tmp_legacy_tp_rate;
+
for (i = 0; i < MCS_GROUP_RATES; i++) {
if (!(mi->supported[group] & BIT(i)))
continue;
@@ -738,27 +901,18 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
mrs = &mg->rates[i];
mrs->retry_updated = false;
- minstrel_calc_rate_stats(mp, mrs);
+ minstrel_ht_calc_rate_stats(mp, mrs);
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,
@@ -766,16 +920,36 @@ 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));
+ for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
+ if (!mi->supported[group])
+ continue;
+
+ mg = &mi->groups[group];
+ mg->max_group_prob_rate = MCS_GROUP_RATES * group;
+
+ for (i = 0; i < MCS_GROUP_RATES; i++) {
+ if (!(mi->supported[group] & BIT(i)))
+ continue;
+
+ index = MCS_GROUP_RATES * group + i;
+
+ /* Find max probability rate per group and global */
+ minstrel_ht_set_best_prob_rate(mi, &tmp_max_prob_rate,
+ index);
+ }
+ }
+
+ mi->max_prob_rate = tmp_max_prob_rate;
+
/* Try to increase robustness of max_prob_rate*/
minstrel_ht_prob_rate_reduce_streams(mi);
- /* try to sample all available rates during each interval */
- mi->sample_count *= 8;
- if (mp->new_avg)
- mi->sample_count /= 2;
+ /* try to sample half of all available rates during each interval */
+ mi->sample_count *= 4;
if (sample)
minstrel_ht_rate_sample_switch(mp, mi);
@@ -795,8 +969,11 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
}
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;
@@ -807,10 +984,15 @@ 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
@@ -887,21 +1069,15 @@ 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_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);
-
-
/* This packet was aggregated but doesn't carry status info */
if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
!(info->flags & IEEE80211_TX_STAT_AMPDU))
@@ -930,10 +1106,10 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
if (mi->sample_mode != MINSTREL_SAMPLE_IDLE)
rate_sample = minstrel_get_ratestats(mi, mi->sample_rate);
- last = !minstrel_ht_txstat_valid(mp, &ar[0]);
+ 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, &ar[i + 1]);
+ !minstrel_ht_txstat_valid(mp, mi, &ar[i + 1]);
rate = minstrel_ht_get_stats(mp, mi, &ar[i]);
if (rate == rate_sample)
@@ -947,9 +1123,8 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
switch (mi->sample_mode) {
case MINSTREL_SAMPLE_IDLE:
- if (mp->new_avg &&
- (mp->hw->max_rates > 1 ||
- mi->total_packets_cur < SAMPLE_SWITCH_THR))
+ if (mp->hw->max_rates > 1 ||
+ mi->total_packets_cur < SAMPLE_SWITCH_THR)
update_interval /= 2;
break;
@@ -1031,7 +1206,10 @@ 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(index / MCS_GROUP_RATES)) {
+ overhead = mi->overhead_legacy;
+ overhead_rtscts = mi->overhead_legacy_rtscts;
+ } else {
overhead = mi->overhead;
overhead_rtscts = mi->overhead_rtscts;
}
@@ -1061,7 +1239,8 @@ 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 = index / MCS_GROUP_RATES;
+ const struct mcs_group *group = &minstrel_mcs_groups[group_idx];
struct minstrel_rate_stats *mrs;
u8 idx;
u16 flags = group->flags;
@@ -1080,13 +1259,17 @@ 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 %= MCS_GROUP_RATES;
+ 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)
@@ -1224,13 +1407,13 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
mrs = &mg->rates[sample_idx];
sample_idx += sample_group * MCS_GROUP_RATES;
- /* Set tp_rate1, tp_rate2 to the highest / second highest max_tp_rate */
+ tp_rate1 = mi->max_tp_rate[0];
+
+ /* Set tp_rate2 to the 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];
} else {
- tp_rate1 = mi->max_tp_rate[0];
tp_rate2 = mi->max_tp_rate[1];
}
@@ -1296,16 +1479,12 @@ 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_ht_is_legacy_group(mi->max_prob_rate / MCS_GROUP_RATES))
minstrel_aggr_check(sta, txrc->skb);
info->flags |= mi->tx_flags;
@@ -1346,6 +1525,9 @@ 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,
sample_group->streams);
@@ -1366,44 +1548,59 @@ 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->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);
}
+}
+
+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;
- mi->supported[MINSTREL_CCK_GROUP] = mi->cck_supported;
+ if (sta->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 minstrel_ht_sta *mi = priv_sta;
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;
+ const struct ieee80211_rate *ctl_rate;
+ 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);
@@ -1412,10 +1609,10 @@ 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);
@@ -1423,6 +1620,14 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
mi->overhead += ack_dur;
mi->overhead_rtscts = mi->overhead + 2 * ack_dur;
+ 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;
+
mi->avg_ampdu_len = MINSTREL_FRAC(1, 1);
/* When using MRR, sample more on the first attempt, without delay */
@@ -1456,10 +1661,8 @@ 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) {
@@ -1520,24 +1723,12 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
n_supported++;
}
- if (!n_supported)
- goto use_legacy;
-
- 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_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
@@ -1561,7 +1752,7 @@ 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;
@@ -1573,72 +1764,80 @@ 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 minstrel_priv *mp;
+ int i;
mp = kzalloc(sizeof(struct minstrel_priv), GFP_ATOMIC);
if (!mp)
@@ -1652,12 +1851,6 @@ minstrel_ht_alloc(struct ieee80211_hw *hw)
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;
@@ -1672,9 +1865,10 @@ minstrel_ht_alloc(struct ieee80211_hw *hw)
mp->hw = hw;
mp->update_interval = HZ / 10;
- mp->new_avg = true;
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;
}
@@ -1690,8 +1884,6 @@ static void minstrel_ht_add_debugfs(struct ieee80211_hw *hw, void *priv,
&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
@@ -1703,13 +1895,9 @@ 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;
prob = mi->groups[i].rates[j].prob_avg;