package/mac80211/patches/563-mac80211_optimize_mcs_rate_mask.patch

   1 --- a/net/mac80211/ieee80211_i.h
   2 +++ b/net/mac80211/ieee80211_i.h
   3 @@ -656,6 +656,8 @@ struct ieee80211_sub_if_data {
   4
   5         /* bitmap of allowed (non-MCS) rate indexes for rate control */
   6         u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
   7 +
   8 +       bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
   9         u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
  10
  11         union {
  12 --- a/net/mac80211/cfg.c
  13 +++ b/net/mac80211/cfg.c
  14 @@ -1887,9 +1887,20 @@ static int ieee80211_set_bitrate_mask(st
  15         }
  16
  17         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
  18 +               struct ieee80211_supported_band *sband = wiphy->bands[i];
  19 +
  20                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
  21                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].mcs,
  22                        sizeof(mask->control[i].mcs));
  23 +
  24 +               sdata->rc_has_mcs_mask[i] = false;
  25 +               if (!sband)
  26 +                       continue;
  27 +
  28 +               if (memcmp(sdata->rc_rateidx_mcs_mask[i],
  29 +                          sband->ht_cap.mcs.rx_mask,
  30 +                          sizeof(sband->ht_cap.mcs.rx_mask)) != 0)
  31 +                       sdata->rc_has_mcs_mask[i] = true;
  32         }
  33
  34         return 0;
  35 --- a/include/net/mac80211.h
  36 +++ b/include/net/mac80211.h
  37 @@ -3590,6 +3590,7 @@ enum rate_control_changed {
  38   *     (deprecated; this will be removed once drivers get updated to use
  39   *     rate_idx_mask)
  40   * @rate_idx_mask: user-requested rate mask (not MCS for now)
  41 + * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use)
  42   * @skb: the skb that will be transmitted, the control information in it needs
  43   *     to be filled in
  44   * @bss: whether this frame is sent out in AP or IBSS mode
  45 @@ -3603,7 +3604,7 @@ struct ieee80211_tx_rate_control {
  46         bool rts, short_preamble;
  47         u8 max_rate_idx;
  48         u32 rate_idx_mask;
  49 -       u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
  50 +       u8 *rate_idx_mcs_mask;
  51         bool bss;
  52  };
  53
  54 --- a/net/mac80211/tx.c
  55 +++ b/net/mac80211/tx.c
  56 @@ -640,9 +640,11 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
  57                 txrc.max_rate_idx = -1;
  58         else
  59                 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
  60 -       memcpy(txrc.rate_idx_mcs_mask,
  61 -              tx->sdata->rc_rateidx_mcs_mask[tx->channel->band],
  62 -              sizeof(txrc.rate_idx_mcs_mask));
  63 +
  64 +       if (tx->sdata->rc_has_mcs_mask[tx->channel->band])
  65 +               txrc.rate_idx_mcs_mask =
  66 +                       tx->sdata->rc_rateidx_mcs_mask[tx->channel->band];
  67 +
  68         txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
  69                     tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
  70                     tx->sdata->vif.type == NL80211_IFTYPE_ADHOC);
  71 @@ -2455,8 +2457,6 @@ struct sk_buff *ieee80211_beacon_get_tim
  72                 txrc.max_rate_idx = -1;
  73         else
  74                 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
  75 -       memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band],
  76 -              sizeof(txrc.rate_idx_mcs_mask));
  77         txrc.bss = true;
  78         rate_control_get_rate(sdata, NULL, &txrc);
  79
  80 --- a/net/mac80211/rate.c
  81 +++ b/net/mac80211/rate.c
  82 @@ -461,9 +461,12 @@ void rate_control_get_rate(struct ieee80
  83          * the common case.
  84          */
  85         mask = sdata->rc_rateidx_mask[info->band];
  86 -       memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[info->band],
  87 -              sizeof(mcs_mask));
  88 -       if (mask != (1 << txrc->sband->n_bitrates) - 1) {
  89 +       if (mask != (1 << txrc->sband->n_bitrates) - 1 || txrc->rate_idx_mcs_mask) {
  90 +               if (txrc->rate_idx_mcs_mask)
  91 +                       memcpy(mcs_mask, txrc->rate_idx_mcs_mask, sizeof(mcs_mask));
  92 +               else
  93 +                       memset(mcs_mask, 0xff, sizeof(mcs_mask));
  94 +
  95                 if (sta) {
  96                         /* Filter out rates that the STA does not support */
  97                         mask &= sta->sta.supp_rates[info->band];