package/kernel/mac80211/patches/subsys/376-mac80211-add-rate-control-support-for-encap-offload.patch

   1 From: Ryder Lee <ryder.lee@mediatek.com>
   2 Date: Fri, 28 May 2021 14:05:43 +0800
   3 Subject: [PATCH] mac80211: add rate control support for encap offload
   4
   5 The software rate control cannot deal with encap offload, so fix it.
   6
   7 Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
   8 ---
   9
  10 --- a/net/mac80211/rate.c
  11 +++ b/net/mac80211/rate.c
  12 @@ -297,15 +297,11 @@ void ieee80211_check_rate_mask(struct ie
  13  static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc)
  14  {
  15         struct sk_buff *skb = txrc->skb;
  16 -       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
  17         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  18 -       __le16 fc;
  19 -
  20 -       fc = hdr->frame_control;
  21
  22         return (info->flags & (IEEE80211_TX_CTL_NO_ACK |
  23                                IEEE80211_TX_CTL_USE_MINRATE)) ||
  24 -               !ieee80211_is_data(fc);
  25 +               !ieee80211_is_tx_data(skb);
  26  }
  27
  28  static void rc_send_low_basicrate(struct ieee80211_tx_rate *rate,
  29 @@ -396,6 +392,10 @@ static bool rate_control_send_low(struct
  30         int mcast_rate;
  31         bool use_basicrate = false;
  32
  33 +       if (ieee80211_is_tx_data(txrc->skb) &&
  34 +           info->flags & IEEE80211_TX_CTL_NO_ACK)
  35 +               return false;
  36 +
  37         if (!pubsta || rc_no_data_or_no_ack_use_min(txrc)) {
  38                 __rate_control_send_low(txrc->hw, sband, pubsta, info,
  39                                         txrc->rate_idx_mask);
  40 @@ -870,7 +870,6 @@ void ieee80211_get_tx_rates(struct ieee8
  41                             int max_rates)
  42  {
  43         struct ieee80211_sub_if_data *sdata;
  44 -       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
  45         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  46         struct ieee80211_supported_band *sband;
  47
  48 @@ -882,7 +881,7 @@ void ieee80211_get_tx_rates(struct ieee8
  49         sdata = vif_to_sdata(vif);
  50         sband = sdata->local->hw.wiphy->bands[info->band];
  51
  52 -       if (ieee80211_is_data(hdr->frame_control))
  53 +       if (ieee80211_is_tx_data(skb))
  54                 rate_control_apply_mask(sdata, sta, sband, dest, max_rates);
  55
  56         if (dest[0].idx < 0)
  57 --- a/net/mac80211/tx.c
  58 +++ b/net/mac80211/tx.c
  59 @@ -679,6 +679,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
  60         u32 len;
  61         struct ieee80211_tx_rate_control txrc;
  62         struct ieee80211_sta_rates *ratetbl = NULL;
  63 +       bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
  64         bool assoc = false;
  65
  66         memset(&txrc, 0, sizeof(txrc));
  67 @@ -720,7 +721,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
  68          * just wants a probe response.
  69          */
  70         if (tx->sdata->vif.bss_conf.use_short_preamble &&
  71 -           (ieee80211_is_data(hdr->frame_control) ||
  72 +           (ieee80211_is_tx_data(tx->skb) ||
  73              (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
  74                 txrc.short_preamble = true;
  75
  76 @@ -742,7 +743,8 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
  77                  "%s: Dropped data frame as no usable bitrate found while "
  78                  "scanning and associated. Target station: "
  79                  "%pM on %d GHz band\n",
  80 -                tx->sdata->name, hdr->addr1,
  81 +                tx->sdata->name,
  82 +                encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
  83                  info->band ? 5 : 2))
  84                 return TX_DROP;
  85
  86 @@ -776,7 +778,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
  87
  88         if (txrc.reported_rate.idx < 0) {
  89                 txrc.reported_rate = tx->rate;
  90 -               if (tx->sta && ieee80211_is_data(hdr->frame_control))
  91 +               if (tx->sta && ieee80211_is_tx_data(tx->skb))
  92                         tx->sta->tx_stats.last_rate = txrc.reported_rate;
  93         } else if (tx->sta)
  94                 tx->sta->tx_stats.last_rate = txrc.reported_rate;
  95 @@ -3660,8 +3662,16 @@ begin:
  96         else
  97                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
  98
  99 -       if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
 100 +       if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
 101 +               if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
 102 +                       r = ieee80211_tx_h_rate_ctrl(&tx);
 103 +                       if (r != TX_CONTINUE) {
 104 +                               ieee80211_free_txskb(&local->hw, skb);
 105 +                               goto begin;
 106 +                       }
 107 +               }
 108                 goto encap_out;
 109 +       }
 110
 111         if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
 112                 struct sta_info *sta = container_of(txq->sta, struct sta_info,
 113 --- a/include/net/mac80211.h
 114 +++ b/include/net/mac80211.h
 115 @@ -6728,4 +6728,22 @@ struct sk_buff *ieee80211_get_fils_disco
 116  struct sk_buff *
 117  ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
 118                                           struct ieee80211_vif *vif);
 119 +
 120 +/**
 121 + * ieee80211_is_tx_data - check if frame is a data frame
 122 + *
 123 + * The function is used to check if a frame is a data frame. Frames with
 124 + * hardware encapsulation enabled are data frames.
 125 + *
 126 + * @skb: the frame to be transmitted.
 127 + */
 128 +static inline bool ieee80211_is_tx_data(struct sk_buff *skb)
 129 +{
 130 +       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 131 +       struct ieee80211_hdr *hdr = (void *) skb->data;
 132 +
 133 +       return info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP ||
 134 +              ieee80211_is_data(hdr->frame_control);
 135 +}
 136 +
 137  #endif /* MAC80211_H */