diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/rc.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/rc.c | 101 |
1 files changed, 57 insertions, 44 deletions
diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c index 9d965e3..64af11f 100644 --- a/drivers/net/wireless/ath/ath9k/rc.c +++ b/drivers/net/wireless/ath/ath9k/rc.c @@ -16,6 +16,7 @@ */ #include <linux/slab.h> +#include <linux/export.h> #include "ath9k.h" @@ -379,7 +380,30 @@ static const struct ath_rate_table ar5416_11g_ratetable = { }; static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table, - struct ieee80211_tx_rate *rate); + struct ieee80211_tx_rate *rate) +{ + int rix = 0, i = 0; + static const int mcs_rix_off[] = { 7, 15, 20, 21, 22, 23 }; + + if (!(rate->flags & IEEE80211_TX_RC_MCS)) + return rate->idx; + + while (i < ARRAY_SIZE(mcs_rix_off) && rate->idx > mcs_rix_off[i]) { + rix++; i++; + } + + rix += rate->idx + rate_table->mcs_start; + + if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && + (rate->flags & IEEE80211_TX_RC_SHORT_GI)) + rix = rate_table->info[rix].ht_index; + else if (rate->flags & IEEE80211_TX_RC_SHORT_GI) + rix = rate_table->info[rix].sgi_index; + else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + rix = rate_table->info[rix].cw40index; + + return rix; +} static void ath_rc_sort_validrates(const struct ath_rate_table *rate_table, struct ath_rate_priv *ath_rc_priv) @@ -533,7 +557,7 @@ static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv, [valid_rate_count] = j; ath_rc_priv->valid_phy_ratecnt[phy] += 1; ath_rc_set_valid_rate_idx(ath_rc_priv, j, 1); - hi = A_MAX(hi, j); + hi = max(hi, j); } } } @@ -569,7 +593,7 @@ static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv, [ath_rc_priv->valid_phy_ratecnt[phy]] = j; ath_rc_priv->valid_phy_ratecnt[phy] += 1; ath_rc_set_valid_rate_idx(ath_rc_priv, j, 1); - hi = A_MAX(hi, j); + hi = max(hi, j); } } @@ -580,7 +604,8 @@ static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv, static u8 ath_rc_get_highest_rix(struct ath_softc *sc, struct ath_rate_priv *ath_rc_priv, const struct ath_rate_table *rate_table, - int *is_probing) + int *is_probing, + bool legacy) { u32 best_thruput, this_thruput, now_msec; u8 rate, next_rate, best_rate, maxindex, minindex; @@ -601,6 +626,8 @@ static u8 ath_rc_get_highest_rix(struct ath_softc *sc, u8 per_thres; rate = ath_rc_priv->valid_rate_index[index]; + if (legacy && !(rate_table->info[rate].rate_flags & RC_LEGACY)) + continue; if (rate > ath_rc_priv->rate_max_phy) continue; @@ -744,7 +771,7 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, struct ieee80211_tx_rate *rates = tx_info->control.rates; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; __le16 fc = hdr->frame_control; - u8 try_per_rate, i = 0, rix; + u8 try_per_rate, i = 0, rix, high_rix; int is_probe = 0; if (rate_control_send_low(sta, priv_sta, txrc)) @@ -763,7 +790,9 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, try_per_rate = 4; rate_table = ath_rc_priv->rate_table; - rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe); + rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, + &is_probe, false); + high_rix = rix; /* * If we're in HT mode and both us and our peer supports LDPC. @@ -799,10 +828,7 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, } /* Fill in the other rates for multirate retry */ - for ( ; i < 4; i++) { - /* Use twice the number of tries for the last MRR segment. */ - if (i + 1 == 4) - try_per_rate = 8; + for ( ; i < 3; i++) { ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); /* All other rates in the series have RTS enabled */ @@ -810,6 +836,24 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, try_per_rate, rix, 1); } + /* Use twice the number of tries for the last MRR segment. */ + try_per_rate = 8; + + /* + * Use a legacy rate as last retry to ensure that the frame + * is tried in both MCS and legacy rates. + */ + if ((rates[2].flags & IEEE80211_TX_RC_MCS) && + (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU) || + (ath_rc_priv->per[high_rix] > 45))) + rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, + &is_probe, true); + else + ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix); + + /* All other rates in the series have RTS enabled */ + ath_rc_rate_set_series(rate_table, &rates[i], txrc, + try_per_rate, rix, 1); /* * NB:Change rate series to enable aggregation when operating * at lower MCS rates. When first rate in series is MCS2 @@ -1080,31 +1124,6 @@ static void ath_rc_update_ht(struct ath_softc *sc, } -static int ath_rc_get_rateindex(const struct ath_rate_table *rate_table, - struct ieee80211_tx_rate *rate) -{ - int rix = 0, i = 0; - static const int mcs_rix_off[] = { 7, 15, 20, 21, 22, 23 }; - - if (!(rate->flags & IEEE80211_TX_RC_MCS)) - return rate->idx; - - while (i < ARRAY_SIZE(mcs_rix_off) && rate->idx > mcs_rix_off[i]) { - rix++; i++; - } - - rix += rate->idx + rate_table->mcs_start; - - if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && - (rate->flags & IEEE80211_TX_RC_SHORT_GI)) - rix = rate_table->info[rix].ht_index; - else if (rate->flags & IEEE80211_TX_RC_SHORT_GI) - rix = rate_table->info[rix].sgi_index; - else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) - rix = rate_table->info[rix].cw40index; - - return rix; -} static void ath_rc_tx_status(struct ath_softc *sc, struct ath_rate_priv *ath_rc_priv, @@ -1228,7 +1247,7 @@ static void ath_rc_init(struct ath_softc *sc, ht_mcs, ath_rc_priv->ht_cap); } - hi = A_MAX(hi, hthi); + hi = max(hi, hthi); } ath_rc_priv->rate_table_size = hi + 1; @@ -1346,12 +1365,6 @@ static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband, if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) return; - if (!(tx_info->flags & IEEE80211_TX_STAT_AMPDU)) { - tx_info->status.ampdu_ack_len = - (tx_info->flags & IEEE80211_TX_STAT_ACK ? 1 : 0); - tx_info->status.ampdu_len = 1; - } - if (!(tx_info->flags & IEEE80211_TX_STAT_ACK)) tx_status = 1; @@ -1488,7 +1501,7 @@ static ssize_t read_file_rcstat(struct file *file, char __user *user_buf, if (rc->rate_table == NULL) return 0; - max = 80 + rc->rate_table->rate_cnt * 1024 + 1; + max = 80 + rc->rate_table_size * 1024 + 1; buf = kmalloc(max, GFP_KERNEL); if (buf == NULL) return -ENOMEM; @@ -1498,7 +1511,7 @@ static ssize_t read_file_rcstat(struct file *file, char __user *user_buf, "HT", "MCS", "Rate", "Success", "Retries", "XRetries", "PER"); - for (i = 0; i < rc->rate_table->rate_cnt; i++) { + for (i = 0; i < rc->rate_table_size; i++) { u32 ratekbps = rc->rate_table->info[i].ratekbps; struct ath_rc_stats *stats = &rc->rcstats[i]; char mcs[5]; |