package/kernel/mac80211/patches/subsys/375-mac80211-call-ieee80211_tx_h_rate_ctrl-when-dequeue.patch

   1 From: Ryder Lee <ryder.lee@mediatek.com>
   2 Date: Fri, 28 May 2021 14:05:41 +0800
   3 Subject: [PATCH] mac80211: call ieee80211_tx_h_rate_ctrl() when dequeue
   4
   5 Make ieee80211_tx_h_rate_ctrl() get called on dequeue to improve
   6 performance since it reduces the turnaround time for rate control.
   7
   8 Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
   9 ---
  10
  11 --- a/net/mac80211/tx.c
  12 +++ b/net/mac80211/tx.c
  13 @@ -1780,8 +1780,6 @@ static int invoke_tx_handlers_early(stru
  14         CALL_TXH(ieee80211_tx_h_ps_buf);
  15         CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
  16         CALL_TXH(ieee80211_tx_h_select_key);
  17 -       if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
  18 -               CALL_TXH(ieee80211_tx_h_rate_ctrl);
  19
  20   txh_done:
  21         if (unlikely(res == TX_DROP)) {
  22 @@ -1814,6 +1812,9 @@ static int invoke_tx_handlers_late(struc
  23                 goto txh_done;
  24         }
  25
  26 +       if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
  27 +               CALL_TXH(ieee80211_tx_h_rate_ctrl);
  28 +
  29         CALL_TXH(ieee80211_tx_h_michael_mic_add);
  30         CALL_TXH(ieee80211_tx_h_sequence);
  31         CALL_TXH(ieee80211_tx_h_fragment);
  32 @@ -3384,15 +3385,21 @@ out:
  33   * Can be called while the sta lock is held. Anything that can cause packets to
  34   * be generated will cause deadlock!
  35   */
  36 -static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
  37 -                                      struct sta_info *sta, u8 pn_offs,
  38 -                                      struct ieee80211_key *key,
  39 -                                      struct sk_buff *skb)
  40 +static ieee80211_tx_result
  41 +ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
  42 +                          struct sta_info *sta, u8 pn_offs,
  43 +                          struct ieee80211_key *key,
  44 +                          struct ieee80211_tx_data *tx)
  45  {
  46 +       struct sk_buff *skb = tx->skb;
  47         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  48         struct ieee80211_hdr *hdr = (void *)skb->data;
  49         u8 tid = IEEE80211_NUM_TIDS;
  50
  51 +       if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) &&
  52 +           ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE)
  53 +               return TX_DROP;
  54 +
  55         if (key)
  56                 info->control.hw_key = &key->conf;
  57
  58 @@ -3441,6 +3448,8 @@ static void ieee80211_xmit_fast_finish(s
  59                         break;
  60                 }
  61         }
  62 +
  63 +       return TX_CONTINUE;
  64  }
  65
  66  static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
  67 @@ -3544,24 +3553,17 @@ static bool ieee80211_xmit_fast(struct i
  68         tx.sta = sta;
  69         tx.key = fast_tx->key;
  70
  71 -       if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
  72 -               tx.skb = skb;
  73 -               r = ieee80211_tx_h_rate_ctrl(&tx);
  74 -               skb = tx.skb;
  75 -               tx.skb = NULL;
  76 -
  77 -               if (r != TX_CONTINUE) {
  78 -                       if (r != TX_QUEUED)
  79 -                               kfree_skb(skb);
  80 -                       return true;
  81 -               }
  82 -       }
  83 -
  84         if (ieee80211_queue_skb(local, sdata, sta, skb))
  85                 return true;
  86
  87 -       ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
  88 -                                  fast_tx->key, skb);
  89 +       tx.skb = skb;
  90 +       r = ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
  91 +                                      fast_tx->key, &tx);
  92 +       tx.skb = NULL;
  93 +       if (r == TX_DROP) {
  94 +               kfree_skb(skb);
  95 +               return true;
  96 +       }
  97
  98         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
  99                 sdata = container_of(sdata->bss,
 100 @@ -3672,8 +3674,12 @@ begin:
 101                     (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
 102                         pn_offs = ieee80211_hdrlen(hdr->frame_control);
 103
 104 -               ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
 105 -                                          tx.key, skb);
 106 +               r = ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
 107 +                                              tx.key, &tx);
 108 +               if (r != TX_CONTINUE) {
 109 +                       ieee80211_free_txskb(&local->hw, skb);
 110 +                       goto begin;
 111 +               }
 112         } else {
 113                 if (invoke_tx_handlers_late(&tx))
 114                         goto begin;