iwlwifi: mvm: rs: update Tx statistics when using fixed rate

The Tx statistics weren't updated when using fixed rate for
debugging. Fix this as Tx statistics are useful in this use case.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index 98edb18..dd457df 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -1065,6 +1065,37 @@ static inline bool rs_rate_column_match(struct rs_rate *a,
                && ant_match;
 }
 
+static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate)
+{
+       if (is_legacy(rate)) {
+               if (rate->ant == ANT_A)
+                       return RS_COLUMN_LEGACY_ANT_A;
+
+               if (rate->ant == ANT_B)
+                       return RS_COLUMN_LEGACY_ANT_B;
+
+               goto err;
+       }
+
+       if (is_siso(rate)) {
+               if (rate->ant == ANT_A || rate->stbc || rate->bfer)
+                       return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI :
+                               RS_COLUMN_SISO_ANT_A;
+
+               if (rate->ant == ANT_B)
+                       return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI :
+                               RS_COLUMN_SISO_ANT_B;
+
+               goto err;
+       }
+
+       if (is_mimo(rate))
+               return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2;
+
+err:
+       return RS_COLUMN_INVALID;
+}
+
 static u8 rs_get_tid(struct ieee80211_hdr *hdr)
 {
        u8 tid = IWL_MAX_TID_COUNT;
@@ -1106,17 +1137,43 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
                return;
        }
 
+       /* This packet was aggregated but doesn't carry status info */
+       if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
+           !(info->flags & IEEE80211_TX_STAT_AMPDU))
+               return;
+
+       rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate);
+
 #ifdef CONFIG_MAC80211_DEBUGFS
-       /* Disable last tx check if we are debugging with fixed rate */
+       /* Disable last tx check if we are debugging with fixed rate but
+        * update tx stats */
        if (lq_sta->pers.dbg_fixed_rate) {
-               IWL_DEBUG_RATE(mvm, "Fixed rate. avoid rate scaling\n");
+               int index = tx_resp_rate.index;
+               enum rs_column column;
+               int attempts, success;
+
+               column = rs_get_column_from_rate(&tx_resp_rate);
+               if (WARN_ONCE(column == RS_COLUMN_INVALID,
+                             "Can't map rate 0x%x to column",
+                             tx_resp_hwrate))
+                       return;
+
+               if (info->flags & IEEE80211_TX_STAT_AMPDU) {
+                       attempts = info->status.ampdu_len;
+                       success = info->status.ampdu_ack_len;
+               } else {
+                       attempts = info->status.rates[0].count;
+                       success = !!(info->flags & IEEE80211_TX_STAT_ACK);
+               }
+
+               lq_sta->pers.tx_stats[column][index].total += attempts;
+               lq_sta->pers.tx_stats[column][index].success += success;
+
+               IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n",
+                              tx_resp_hwrate, success, attempts);
                return;
        }
 #endif
-       /* This packet was aggregated but doesn't carry status info */
-       if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
-           !(info->flags & IEEE80211_TX_STAT_AMPDU))
-               return;
 
        if (time_after(jiffies,
                       (unsigned long)(lq_sta->last_tx +
@@ -1142,7 +1199,6 @@ void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
        table = &lq_sta->lq;
        lq_hwrate = le32_to_cpu(table->rs_table[0]);
        rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate);
-       rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate);
 
        /* Here we actually compare this rate to the latest LQ command */
        if (!rs_rate_equal(&tx_resp_rate, &lq_rate, allow_ant_mismatch)) {