mac80211/drivers: rewrite the rate control API

So after the previous changes we were still unhappy with how
convoluted the API is and decided to make things simpler for
everybody. This completely changes the rate control API, now
taking into account 802.11n with MCS rates and more control,
most drivers don't support that though.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 20 insertions, 20 deletions

diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 9b2526030965..6afafeddeda2 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -1864,24 +1864,21 @@ static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
 
         hdr = (struct ieee80211_hdr *)skb->data;
         fc = hdr->frame_control;
-        tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
+        /* XXX: UGLY HACK!! */
+        tx_info_priv = (struct ath_tx_info_priv *)tx_info->control.vif;
 
         spin_lock_bh(&sc->node_lock);
         an = ath_node_find(sc, hdr->addr1);
         spin_unlock_bh(&sc->node_lock);
 
-        if (!an || !priv_sta || !ieee80211_is_data(fc)) {
-                if (tx_info->driver_data[0] != NULL) {
-                        kfree(tx_info->driver_data[0]);
-                        tx_info->driver_data[0] = NULL;
-                }
+        if (tx_info_priv == NULL)
                 return;
-        }
-        if (tx_info->driver_data[0] != NULL) {
+
+        if (an && priv_sta && ieee80211_is_data(fc))
                 ath_rate_tx_complete(sc, an, priv_sta, tx_info_priv);
-                kfree(tx_info->driver_data[0]);
-                tx_info->driver_data[0] = NULL;
-        }
+
+        kfree(tx_info_priv);
+        tx_info->control.vif = NULL;
 }
 
 static void ath_tx_aggr_resp(struct ath_softc *sc,
@@ -1927,10 +1924,11 @@ static void ath_tx_aggr_resp(struct ath_softc *sc,
         }
 }
 
-static void ath_get_rate(void *priv, struct ieee80211_supported_band *sband,
-                         struct ieee80211_sta *sta, void *priv_sta,
-                         struct sk_buff *skb, struct rate_selection *sel)
+static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
+                         struct ieee80211_tx_rate_control *txrc)
 {
+        struct ieee80211_supported_band *sband = txrc->sband;
+        struct sk_buff *skb = txrc->skb;
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
         struct ath_softc *sc = priv;
         struct ieee80211_hw *hw = sc->hw;
@@ -1945,17 +1943,17 @@ static void ath_get_rate(void *priv, struct ieee80211_supported_band *sband,
 
         DPRINTF(sc, ATH_DBG_RATE, "%s\n", __func__);
 
-        /* allocate driver private area of tx_info */
-        tx_info->driver_data[0] = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC);
-        ASSERT(tx_info->driver_data[0] != NULL);
-        tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
+        /* allocate driver private area of tx_info, XXX: UGLY HACK! */
+        tx_info->control.vif = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC);
+        tx_info_priv = (struct ath_tx_info_priv *)tx_info->control.vif;
+        ASSERT(tx_info_priv != NULL);
 
         lowest_idx = rate_lowest_index(sband, sta);
         tx_info_priv->min_rate = (sband->bitrates[lowest_idx].bitrate * 2) / 10;
         /* lowest rate for management and multicast/broadcast frames */
         if (!ieee80211_is_data(fc) ||
             is_multicast_ether_addr(hdr->addr1) || !sta) {
-                sel->rate_idx = lowest_idx;
+                tx_info->control.rates[0].idx = lowest_idx;
                 return;
         }
 
@@ -1966,8 +1964,10 @@ static void ath_get_rate(void *priv, struct ieee80211_supported_band *sband,
                           tx_info_priv->rcs,
                           &is_probe,
                           false);
+#if 0
         if (is_probe)
                 sel->probe_idx = ath_rc_priv->tx_ratectrl.probe_rate;
+#endif
 
         /* Ratecontrol sometimes returns invalid rate index */
         if (tx_info_priv->rcs[0].rix != 0xff)
@@ -1975,7 +1975,7 @@ static void ath_get_rate(void *priv, struct ieee80211_supported_band *sband,
         else
                 tx_info_priv->rcs[0].rix = ath_rc_priv->prev_data_rix;
 
-        sel->rate_idx = tx_info_priv->rcs[0].rix;
+        tx_info->control.rates[0].idx = tx_info_priv->rcs[0].rix;
 
         /* Check if aggregation has to be enabled for this tid */