From fd7dbee51b3d98402edb11fec0c93d96476e0ae1 Mon Sep 17 00:00:00 2001 From: Eyal Shapira Date: Sun, 6 Apr 2014 04:39:23 +0300 Subject: [PATCH] iwlwifi: mvm: rs: fallback to legacy Tx columns Allow switching back to legacy Tx columns so we'll stop doing HT/VHT in case we're far from the AP. Stop active aggregation when making a deciding to stay in a legacy column. Despite having low legacy rates in the LQ table lower entries it doesn't help much in case we're doing aggregations as the aggregation was being transmitted in the initial rate of the table. This should help traffic stalls when far from the AP. Cc: [3.14] Signed-off-by: Eyal Shapira Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/rs.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c index 0d03dcd..b007db9 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/iwlwifi/mvm/rs.c @@ -142,7 +142,7 @@ enum rs_column_mode { RS_MIMO2, }; -#define MAX_NEXT_COLUMNS 5 +#define MAX_NEXT_COLUMNS 7 #define MAX_COLUMN_CHECKS 3 typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm, @@ -214,6 +214,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_B, RS_COLUMN_MIMO2, RS_COLUMN_MIMO2_SGI, + RS_COLUMN_INVALID, + RS_COLUMN_INVALID, }, }, [RS_COLUMN_LEGACY_ANT_B] = { @@ -225,6 +227,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_B, RS_COLUMN_MIMO2, RS_COLUMN_MIMO2_SGI, + RS_COLUMN_INVALID, + RS_COLUMN_INVALID, }, }, [RS_COLUMN_SISO_ANT_A] = { @@ -236,6 +240,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_A_SGI, RS_COLUMN_SISO_ANT_B_SGI, RS_COLUMN_MIMO2_SGI, + RS_COLUMN_LEGACY_ANT_A, + RS_COLUMN_LEGACY_ANT_B, }, .checks = { rs_siso_allow, @@ -250,6 +256,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_B_SGI, RS_COLUMN_SISO_ANT_A_SGI, RS_COLUMN_MIMO2_SGI, + RS_COLUMN_LEGACY_ANT_A, + RS_COLUMN_LEGACY_ANT_B, }, .checks = { rs_siso_allow, @@ -265,6 +273,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_A, RS_COLUMN_SISO_ANT_B, RS_COLUMN_MIMO2, + RS_COLUMN_LEGACY_ANT_A, + RS_COLUMN_LEGACY_ANT_B, }, .checks = { rs_siso_allow, @@ -281,6 +291,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_B, RS_COLUMN_SISO_ANT_A, RS_COLUMN_MIMO2, + RS_COLUMN_LEGACY_ANT_A, + RS_COLUMN_LEGACY_ANT_B, }, .checks = { rs_siso_allow, @@ -296,6 +308,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_A_SGI, RS_COLUMN_SISO_ANT_B_SGI, RS_COLUMN_MIMO2_SGI, + RS_COLUMN_LEGACY_ANT_A, + RS_COLUMN_LEGACY_ANT_B, }, .checks = { rs_mimo_allow, @@ -311,6 +325,8 @@ static const struct rs_tx_column rs_tx_columns[] = { RS_COLUMN_SISO_ANT_A, RS_COLUMN_SISO_ANT_B, RS_COLUMN_MIMO2, + RS_COLUMN_LEGACY_ANT_A, + RS_COLUMN_LEGACY_ANT_B, }, .checks = { rs_mimo_allow, @@ -2070,8 +2086,18 @@ lq_update: * stay with best antenna legacy modulation for a while * before next round of mode comparisons. */ tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); - if (is_legacy(&tbl1->rate) && !sta->ht_cap.ht_supported) { + if (is_legacy(&tbl1->rate)) { IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n"); + + if (tid != IWL_MAX_TID_COUNT) { + tid_data = &sta_priv->tid_data[tid]; + if (tid_data->state != IWL_AGG_OFF) { + IWL_DEBUG_RATE(mvm, + "Stop aggregation on tid %d\n", + tid); + ieee80211_stop_tx_ba_session(sta, tid); + } + } rs_set_stay_in_table(mvm, 1, lq_sta); } else { /* If we're in an HT mode, and all 3 mode switch actions -- 2.7.4