package/kernel/mac80211/patches/318-mac80211-add-ieee80211_tx_status_noskb.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Sat, 15 Nov 2014 23:50:27 +0100
   3 Subject: [PATCH] mac80211: add ieee80211_tx_status_noskb
   4
   5 This can be used by drivers that cannot reliably map tx status
   6 information onto specific skbs.
   7
   8 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
   9 ---
  10
  11 --- a/include/net/mac80211.h
  12 +++ b/include/net/mac80211.h
  13 @@ -3517,6 +3517,28 @@ void ieee80211_tx_status(struct ieee8021
  14                          struct sk_buff *skb);
  15
  16  /**
  17 + * ieee80211_tx_status_noskb - transmit status callback without skb
  18 + *
  19 + * This function can be used as a replacement for ieee80211_tx_status
  20 + * in drivers that cannot reliably map tx status information back to
  21 + * specific skbs.
  22 + *
  23 + * This function may not be called in IRQ context. Calls to this function
  24 + * for a single hardware must be synchronized against each other. Calls
  25 + * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe()
  26 + * may not be mixed for a single hardware. Must not run concurrently with
  27 + * ieee80211_rx() or ieee80211_rx_ni().
  28 + *
  29 + * @hw: the hardware the frame was transmitted by
  30 + * @sta: the receiver station to which this packet is sent
  31 + *     (NULL for multicast packets)
  32 + * @info: tx status information
  33 + */
  34 +void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
  35 +                              struct ieee80211_sta *sta,
  36 +                              struct ieee80211_tx_info *info);
  37 +
  38 +/**
  39   * ieee80211_tx_status_ni - transmit status callback (in process context)
  40   *
  41   * Like ieee80211_tx_status() but can be called in process context.
  42 --- a/net/mac80211/rate.h
  43 +++ b/net/mac80211/rate.h
  44 @@ -49,6 +49,23 @@ static inline void rate_control_tx_statu
  45  }
  46
  47
  48 +static inline void
  49 +rate_control_tx_status_noskb(struct ieee80211_local *local,
  50 +                            struct ieee80211_supported_band *sband,
  51 +                            struct sta_info *sta,
  52 +                            struct ieee80211_tx_info *info)
  53 +{
  54 +       struct rate_control_ref *ref = local->rate_ctrl;
  55 +       struct ieee80211_sta *ista = &sta->sta;
  56 +       void *priv_sta = sta->rate_ctrl_priv;
  57 +
  58 +       if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  59 +               return;
  60 +
  61 +       ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  62 +}
  63 +
  64 +
  65  static inline void rate_control_rate_init(struct sta_info *sta)
  66  {
  67         struct ieee80211_local *local = sta->sdata->local;
  68 --- a/net/mac80211/status.c
  69 +++ b/net/mac80211/status.c
  70 @@ -541,10 +541,9 @@ static void ieee80211_tx_latency_end_msr
  71  #define STA_LOST_TDLS_PKT_THRESHOLD    10
  72  #define STA_LOST_TDLS_PKT_TIME         (10*HZ) /* 10secs since last ACK */
  73
  74 -static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb)
  75 +static void ieee80211_lost_packet(struct sta_info *sta,
  76 +                                 struct ieee80211_tx_info *info)
  77  {
  78 -       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  79 -
  80         /* This packet was aggregated but doesn't carry status info */
  81         if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
  82             !(info->flags & IEEE80211_TX_STAT_AMPDU))
  83 @@ -571,24 +570,13 @@ static void ieee80211_lost_packet(struct
  84         sta->lost_packets = 0;
  85  }
  86
  87 -void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
  88 +static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
  89 +                                 struct ieee80211_tx_info *info,
  90 +                                 int *retry_count)
  91  {
  92 -       struct sk_buff *skb2;
  93 -       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
  94 -       struct ieee80211_local *local = hw_to_local(hw);
  95 -       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  96 -       __le16 fc;
  97 -       struct ieee80211_supported_band *sband;
  98 -       struct ieee80211_sub_if_data *sdata;
  99 -       struct net_device *prev_dev = NULL;
 100 -       struct sta_info *sta, *tmp;
 101 -       int retry_count = -1, i;
 102         int rates_idx = -1;
 103 -       bool send_to_cooked;
 104 -       bool acked;
 105 -       struct ieee80211_bar *bar;
 106 -       int rtap_len;
 107 -       int shift = 0;
 108 +       int count = -1;
 109 +       int i;
 110
 111         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 112                 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 113 @@ -606,12 +594,94 @@ void ieee80211_tx_status(struct ieee8021
 114                         break;
 115                 }
 116
 117 -               retry_count += info->status.rates[i].count;
 118 +               count += info->status.rates[i].count;
 119         }
 120         rates_idx = i - 1;
 121
 122 -       if (retry_count < 0)
 123 -               retry_count = 0;
 124 +       if (count < 0)
 125 +               count = 0;
 126 +
 127 +       *retry_count = count;
 128 +       return rates_idx;
 129 +}
 130 +
 131 +void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
 132 +                              struct ieee80211_sta *pubsta,
 133 +                              struct ieee80211_tx_info *info)
 134 +{
 135 +       struct ieee80211_local *local = hw_to_local(hw);
 136 +       struct ieee80211_supported_band *sband;
 137 +       int retry_count;
 138 +       int rates_idx;
 139 +       bool acked;
 140 +
 141 +       rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
 142 +
 143 +       sband = hw->wiphy->bands[info->band];
 144 +
 145 +       acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
 146 +       if (pubsta) {
 147 +               struct sta_info *sta;
 148 +
 149 +               sta = container_of(pubsta, struct sta_info, sta);
 150 +
 151 +               if (info->flags & IEEE80211_TX_STATUS_EOSP)
 152 +                       clear_sta_flag(sta, WLAN_STA_SP);
 153 +
 154 +               if (!acked)
 155 +                       sta->tx_retry_failed++;
 156 +               sta->tx_retry_count += retry_count;
 157 +
 158 +               if (acked) {
 159 +                       sta->last_rx = jiffies;
 160 +
 161 +                       if (sta->lost_packets)
 162 +                               sta->lost_packets = 0;
 163 +
 164 +                       /* Track when last TDLS packet was ACKed */
 165 +                       if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
 166 +                               sta->last_tdls_pkt_time = jiffies;
 167 +               } else {
 168 +                       ieee80211_lost_packet(sta, info);
 169 +               }
 170 +
 171 +               rate_control_tx_status_noskb(local, sband, sta, info);
 172 +       }
 173 +
 174 +       if (acked) {
 175 +                   local->dot11TransmittedFrameCount++;
 176 +                   if (!pubsta)
 177 +                           local->dot11MulticastTransmittedFrameCount++;
 178 +                   if (retry_count > 0)
 179 +                           local->dot11RetryCount++;
 180 +                   if (retry_count > 1)
 181 +                           local->dot11MultipleRetryCount++;
 182 +       } else {
 183 +               local->dot11FailedCount++;
 184 +       }
 185 +}
 186 +EXPORT_SYMBOL(ieee80211_tx_status_noskb);
 187 +
 188 +void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 189 +{
 190 +       struct sk_buff *skb2;
 191 +       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 192 +       struct ieee80211_local *local = hw_to_local(hw);
 193 +       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 194 +       __le16 fc;
 195 +       struct ieee80211_supported_band *sband;
 196 +       struct ieee80211_sub_if_data *sdata;
 197 +       struct net_device *prev_dev = NULL;
 198 +       struct sta_info *sta, *tmp;
 199 +       int retry_count;
 200 +       int rates_idx;
 201 +       bool send_to_cooked;
 202 +       bool acked;
 203 +       struct ieee80211_bar *bar;
 204 +       int rtap_len;
 205 +       int shift = 0;
 206 +
 207 +       rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
 208
 209         rcu_read_lock();
 210
 211 @@ -716,7 +786,7 @@ void ieee80211_tx_status(struct ieee8021
 212                                 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
 213                                         sta->last_tdls_pkt_time = jiffies;
 214                         } else {
 215 -                               ieee80211_lost_packet(sta, skb);
 216 +                               ieee80211_lost_packet(sta, info);
 217                         }
 218                 }
 219