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|
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -851,6 +851,7 @@ enum ieee80211_smps_mode {
* the CONF_PS flag is set.
*
* @power_level: requested transmit power (in dBm)
+ * @max_antenna_gain: maximum antenna gain adjusted by user config (in dBi)
*
* @channel: the channel to tune to
* @channel_type: the channel (HT) type
@@ -870,6 +871,7 @@ struct ieee80211_conf {
u32 flags;
int power_level, dynamic_ps_timeout;
int max_sleep_period;
+ int max_antenna_gain;
u16 listen_interval;
u8 ps_dtim_period;
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -101,7 +101,7 @@ int ieee80211_hw_config(struct ieee80211
{
struct ieee80211_channel *chan;
int ret = 0;
- int power;
+ int power, ant_gain, max_power;
enum nl80211_channel_type channel_type;
u32 offchannel_flag;
@@ -152,19 +152,31 @@ int ieee80211_hw_config(struct ieee80211
changed |= IEEE80211_CONF_CHANGE_SMPS;
}
- if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||
- test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
- test_bit(SCAN_HW_SCANNING, &local->scanning) ||
- !local->ap_power_level)
- power = chan->max_power;
- else
- power = min(chan->max_power, local->ap_power_level);
+ max_power = chan->max_reg_power;
+ if (!test_bit(SCAN_SW_SCANNING, &local->scanning) &&
+ !test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) &&
+ !test_bit(SCAN_HW_SCANNING, &local->scanning) &&
+ local->ap_power_level)
+ max_power = min(max_power, local->ap_power_level);
+
+ ant_gain = chan->max_antenna_gain;
+ if (local->user_antenna_gain > 0) {
+ if (local->user_antenna_gain > ant_gain) {
+ max_power -= local->user_antenna_gain - ant_gain;
+ ant_gain = 0;
+ } else
+ ant_gain -= local->user_antenna_gain;
+ }
+
+ power = min(chan->max_power, max_power);
if (local->user_power_level >= 0)
power = min(power, local->user_power_level);
- if (local->hw.conf.power_level != power) {
+ if (local->hw.conf.power_level != power ||
+ local->hw.conf.max_antenna_gain != ant_gain) {
changed |= IEEE80211_CONF_CHANGE_POWER;
+ local->hw.conf.max_antenna_gain = ant_gain;
local->hw.cur_power_level = power;
local->hw.conf.power_level = power;
}
@@ -620,6 +632,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(
IEEE80211_RADIOTAP_MCS_HAVE_GI |
IEEE80211_RADIOTAP_MCS_HAVE_BW;
local->user_power_level = -1;
+ local->user_antenna_gain = -1;
wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
INIT_LIST_HEAD(&local->interfaces);
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1063,6 +1063,7 @@ struct ieee80211_local {
int user_power_level; /* in dBm */
int ap_power_level; /* in dBm */
+ int user_antenna_gain; /* in dBi */
enum ieee80211_smps_mode smps_mode;
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1517,6 +1517,8 @@ enum nl80211_attrs {
NL80211_ATTR_USER_REG_HINT_TYPE,
+ NL80211_ATTR_WIPHY_ANTENNA_GAIN,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -355,6 +355,7 @@ static const struct nla_policy nl80211_p
[NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
[NL80211_ATTR_WDEV] = { .type = NLA_U64 },
[NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
+ [NL80211_ATTR_WIPHY_ANTENNA_GAIN] = { .type = NLA_U32 },
};
/* policy for the key attributes */
@@ -1604,6 +1605,22 @@ static int nl80211_set_wiphy(struct sk_b
goto bad_res;
}
+ if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_GAIN]) {
+ int idx, dbi = 0;
+
+ if (!rdev->ops->set_antenna_gain) {
+ result = -EOPNOTSUPP;
+ goto bad_res;
+ }
+
+ idx = NL80211_ATTR_WIPHY_ANTENNA_GAIN;
+ dbi = nla_get_u32(info->attrs[idx]);
+
+ result = rdev->ops->set_antenna_gain(&rdev->wiphy, dbi);
+ if (result)
+ goto bad_res;
+ }
+
if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
u32 tx_ant, rx_ant;
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1984,6 +1984,19 @@ static int ieee80211_get_tx_power(struct
return 0;
}
+static int ieee80211_set_antenna_gain(struct wiphy *wiphy, int dbi)
+{
+ struct ieee80211_local *local = wiphy_priv(wiphy);
+
+ if (dbi < 0)
+ return -EINVAL;
+
+ local->user_antenna_gain = dbi;
+ ieee80211_hw_config(local, 0);
+
+ return 0;
+}
+
static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
const u8 *addr)
{
@@ -3082,6 +3095,7 @@ struct cfg80211_ops mac80211_config_ops
.set_wiphy_params = ieee80211_set_wiphy_params,
.set_tx_power = ieee80211_set_tx_power,
.get_tx_power = ieee80211_get_tx_power,
+ .set_antenna_gain = ieee80211_set_antenna_gain,
.set_wds_peer = ieee80211_set_wds_peer,
.rfkill_poll = ieee80211_rfkill_poll,
CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1552,6 +1552,7 @@ struct cfg80211_gtk_rekey_data {
* the power passed is in mBm, to get dBm use MBM_TO_DBM().
* @get_tx_power: store the current TX power into the dbm variable;
* return 0 if successful
+ * @set_antenna_gain: set antenna gain to reduce maximum tx power if necessary
*
* @set_wds_peer: set the WDS peer for a WDS interface
*
@@ -1751,6 +1752,7 @@ struct cfg80211_ops {
int (*set_tx_power)(struct wiphy *wiphy,
enum nl80211_tx_power_setting type, int mbm);
int (*get_tx_power)(struct wiphy *wiphy, int *dbm);
+ int (*set_antenna_gain)(struct wiphy *wiphy, int dbi);
int (*set_wds_peer)(struct wiphy *wiphy, struct net_device *dev,
const u8 *addr);
|
