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authorEyal Shapira <eyal@wizery.com>2014-04-06 04:39:23 +0300
committerEmmanuel Grumbach <emmanuel.grumbach@intel.com>2014-04-13 16:51:05 +0300
commitfd7dbee51b3d98402edb11fec0c93d96476e0ae1 (patch)
treed89a3bd38a31c580ac7a0cee27ab5c5b84512a24 /drivers/net
parent87d5e4155c0088e6766b4f0193b63fa0eab71220 (diff)
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: <stable@vger.kernel.org> [3.14] Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/rs.c30
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index 0d03dcd2fc3d..b007db9cf3aa 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