package/mac80211/patches/524-mac80211_configure_antenna_gain.patch

   1 --- a/include/net/mac80211.h
   2 +++ b/include/net/mac80211.h
   3 @@ -851,6 +851,7 @@ enum ieee80211_smps_mode {
   4   *     the CONF_PS flag is set.
   5   *
   6   * @power_level: requested transmit power (in dBm)
   7 + * @max_antenna_gain: maximum antenna gain adjusted by user config (in dBi)
   8   *
   9   * @channel: the channel to tune to
  10   * @channel_type: the channel (HT) type
  11 @@ -870,6 +871,7 @@ struct ieee80211_conf {
  12         u32 flags;
  13         int power_level, dynamic_ps_timeout;
  14         int max_sleep_period;
  15 +       int max_antenna_gain;
  16
  17         u16 listen_interval;
  18         u8 ps_dtim_period;
  19 --- a/net/mac80211/main.c
  20 +++ b/net/mac80211/main.c
  21 @@ -101,7 +101,7 @@ int ieee80211_hw_config(struct ieee80211
  22  {
  23         struct ieee80211_channel *chan;
  24         int ret = 0;
  25 -       int power;
  26 +       int power, ant_gain, max_power;
  27         enum nl80211_channel_type channel_type;
  28         u32 offchannel_flag;
  29
  30 @@ -152,19 +152,31 @@ int ieee80211_hw_config(struct ieee80211
  31                 changed |= IEEE80211_CONF_CHANGE_SMPS;
  32         }
  33
  34 -       if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  35 -           test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
  36 -           test_bit(SCAN_HW_SCANNING, &local->scanning) ||
  37 -           !local->ap_power_level)
  38 -               power = chan->max_power;
  39 -       else
  40 -               power = min(chan->max_power, local->ap_power_level);
  41 +       max_power = chan->max_reg_power;
  42 +       if (!test_bit(SCAN_SW_SCANNING, &local->scanning) &&
  43 +           !test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) &&
  44 +           !test_bit(SCAN_HW_SCANNING, &local->scanning) &&
  45 +           local->ap_power_level)
  46 +               max_power = min(max_power, local->ap_power_level);
  47 +
  48 +       ant_gain = chan->max_antenna_gain;
  49 +       if (local->user_antenna_gain > 0) {
  50 +               if (local->user_antenna_gain > ant_gain) {
  51 +                       max_power -= local->user_antenna_gain - ant_gain;
  52 +                       ant_gain = 0;
  53 +               } else
  54 +                       ant_gain -= local->user_antenna_gain;
  55 +       }
  56 +
  57 +       power = min(chan->max_power, max_power);
  58
  59         if (local->user_power_level >= 0)
  60                 power = min(power, local->user_power_level);
  61
  62 -       if (local->hw.conf.power_level != power) {
  63 +       if (local->hw.conf.power_level != power ||
  64 +               local->hw.conf.max_antenna_gain != ant_gain) {
  65                 changed |= IEEE80211_CONF_CHANGE_POWER;
  66 +               local->hw.conf.max_antenna_gain = ant_gain;
  67                 local->hw.cur_power_level = power;
  68                 local->hw.conf.power_level = power;
  69         }
  70 @@ -620,6 +632,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(
  71                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
  72                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
  73         local->user_power_level = -1;
  74 +       local->user_antenna_gain = -1;
  75         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
  76
  77         INIT_LIST_HEAD(&local->interfaces);
  78 --- a/net/mac80211/ieee80211_i.h
  79 +++ b/net/mac80211/ieee80211_i.h
  80 @@ -1063,6 +1063,7 @@ struct ieee80211_local {
  81
  82         int user_power_level; /* in dBm */
  83         int ap_power_level; /* in dBm */
  84 +       int user_antenna_gain; /* in dBi */
  85
  86         enum ieee80211_smps_mode smps_mode;
  87
  88 --- a/include/linux/nl80211.h
  89 +++ b/include/linux/nl80211.h
  90 @@ -1517,6 +1517,8 @@ enum nl80211_attrs {
  91
  92         NL80211_ATTR_USER_REG_HINT_TYPE,
  93
  94 +       NL80211_ATTR_WIPHY_ANTENNA_GAIN,
  95 +
  96         /* add attributes here, update the policy in nl80211.c */
  97
  98         __NL80211_ATTR_AFTER_LAST,
  99 --- a/net/wireless/nl80211.c
 100 +++ b/net/wireless/nl80211.c
 101 @@ -355,6 +355,7 @@ static const struct nla_policy nl80211_p
 102         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 103         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 104         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 105 +       [NL80211_ATTR_WIPHY_ANTENNA_GAIN] = { .type = NLA_U32 },
 106  };
 107
 108  /* policy for the key attributes */
 109 @@ -1604,6 +1605,22 @@ static int nl80211_set_wiphy(struct sk_b
 110                         goto bad_res;
 111         }
 112
 113 +       if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_GAIN]) {
 114 +               int idx, dbi = 0;
 115 +
 116 +               if (!rdev->ops->set_antenna_gain) {
 117 +                       result = -EOPNOTSUPP;
 118 +                       goto bad_res;
 119 +               }
 120 +
 121 +               idx = NL80211_ATTR_WIPHY_ANTENNA_GAIN;
 122 +               dbi = nla_get_u32(info->attrs[idx]);
 123 +
 124 +               result = rdev->ops->set_antenna_gain(&rdev->wiphy, dbi);
 125 +               if (result)
 126 +                       goto bad_res;
 127 +       }
 128 +
 129         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
 130             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
 131                 u32 tx_ant, rx_ant;
 132 --- a/net/mac80211/cfg.c
 133 +++ b/net/mac80211/cfg.c
 134 @@ -1986,6 +1986,19 @@ static int ieee80211_get_tx_power(struct
 135         return 0;
 136  }
 137
 138 +static int ieee80211_set_antenna_gain(struct wiphy *wiphy, int dbi)
 139 +{
 140 +       struct ieee80211_local *local = wiphy_priv(wiphy);
 141 +
 142 +       if (dbi < 0)
 143 +               return -EINVAL;
 144 +
 145 +       local->user_antenna_gain = dbi;
 146 +       ieee80211_hw_config(local, 0);
 147 +
 148 +       return 0;
 149 +}
 150 +
 151  static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
 152                                   const u8 *addr)
 153  {
 154 @@ -3084,6 +3097,7 @@ struct cfg80211_ops mac80211_config_ops
 155         .set_wiphy_params = ieee80211_set_wiphy_params,
 156         .set_tx_power = ieee80211_set_tx_power,
 157         .get_tx_power = ieee80211_get_tx_power,
 158 +       .set_antenna_gain = ieee80211_set_antenna_gain,
 159         .set_wds_peer = ieee80211_set_wds_peer,
 160         .rfkill_poll = ieee80211_rfkill_poll,
 161         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
 162 --- a/include/net/cfg80211.h
 163 +++ b/include/net/cfg80211.h
 164 @@ -1551,6 +1551,7 @@ struct cfg80211_gtk_rekey_data {
 165   *     the power passed is in mBm, to get dBm use MBM_TO_DBM().
 166   * @get_tx_power: store the current TX power into the dbm variable;
 167   *     return 0 if successful
 168 + * @set_antenna_gain: set antenna gain to reduce maximum tx power if necessary
 169   *
 170   * @set_wds_peer: set the WDS peer for a WDS interface
 171   *
 172 @@ -1750,6 +1751,7 @@ struct cfg80211_ops {
 173         int     (*set_tx_power)(struct wiphy *wiphy,
 174                                 enum nl80211_tx_power_setting type, int mbm);
 175         int     (*get_tx_power)(struct wiphy *wiphy, int *dbm);
 176 +       int     (*set_antenna_gain)(struct wiphy *wiphy, int dbi);
 177
 178         int     (*set_wds_peer)(struct wiphy *wiphy, struct net_device *dev,
 179                                 const u8 *addr);