+++ /dev/null
---- a/include/net/cfg80211.h
-+++ b/include/net/cfg80211.h
-@@ -4084,6 +4084,7 @@ struct mgmt_frame_regs {
- * (as advertised by the nl80211 feature flag.)
- * @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
- *
- * @rfkill_poll: polls the hw rfkill line, use cfg80211 reporting
- * functions to adjust rfkill hw state
-@@ -4434,6 +4435,7 @@ struct cfg80211_ops {
- enum nl80211_tx_power_setting type, int mbm);
- int (*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
- int *dbm);
-+ int (*set_antenna_gain)(struct wiphy *wiphy, int dbi);
-
- void (*rfkill_poll)(struct wiphy *wiphy);
-
---- a/include/net/mac80211.h
-+++ b/include/net/mac80211.h
-@@ -1677,6 +1677,7 @@ enum ieee80211_smps_mode {
- *
- * @power_level: requested transmit power (in dBm), backward compatibility
- * value only that is set to the minimum of all interfaces
-+ * @max_antenna_gain: maximum antenna gain adjusted by user config (in dBi)
- *
- * @chandef: the channel definition to tune to
- * @radar_enabled: whether radar detection is enabled
-@@ -1697,6 +1698,7 @@ enum ieee80211_smps_mode {
- struct ieee80211_conf {
- u32 flags;
- int power_level, dynamic_ps_timeout;
-+ int max_antenna_gain;
-
- u16 listen_interval;
- u8 ps_dtim_period;
---- a/include/uapi/linux/nl80211.h
-+++ b/include/uapi/linux/nl80211.h
-@@ -2749,6 +2749,9 @@ enum nl80211_commands {
- * When used with %NL80211_CMD_FRAME_TX_STATUS, indicates the ack RX
- * timestamp. When used with %NL80211_CMD_FRAME RX notification, indicates
- * the incoming frame RX timestamp.
-+ * @NL80211_ATTR_WIPHY_ANTENNA_GAIN: Configured antenna gain. Used to reduce
-+ * transmit power to stay within regulatory limits. u32, dBi.
-+ *
- * @NUM_NL80211_ATTR: total number of nl80211_attrs available
- * @NL80211_ATTR_MAX: highest attribute number currently defined
- * @__NL80211_ATTR_AFTER_LAST: internal use
-@@ -3277,6 +3280,8 @@ enum nl80211_attrs {
- NL80211_ATTR_TX_HW_TIMESTAMP,
- NL80211_ATTR_RX_HW_TIMESTAMP,
-
-+ NL80211_ATTR_WIPHY_ANTENNA_GAIN,
-+
- /* add attributes here, update the policy in nl80211.c */
-
- __NL80211_ATTR_AFTER_LAST,
---- a/net/mac80211/cfg.c
-+++ b/net/mac80211/cfg.c
-@@ -3046,6 +3046,19 @@ 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 void ieee80211_rfkill_poll(struct wiphy *wiphy)
- {
- struct ieee80211_local *local = wiphy_priv(wiphy);
-@@ -4956,6 +4969,7 @@ const struct cfg80211_ops mac80211_confi
- .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,
- .rfkill_poll = ieee80211_rfkill_poll,
- CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
- CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
---- a/net/mac80211/ieee80211_i.h
-+++ b/net/mac80211/ieee80211_i.h
-@@ -1542,6 +1542,7 @@ struct ieee80211_local {
- int dynamic_ps_forced_timeout;
-
- int user_power_level; /* in dBm, for all interfaces */
-+ int user_antenna_gain; /* in dBi */
-
- enum ieee80211_smps_mode smps_mode;
-
---- a/net/mac80211/main.c
-+++ b/net/mac80211/main.c
-@@ -96,7 +96,7 @@ static u32 ieee80211_hw_conf_chan(struct
- struct ieee80211_sub_if_data *sdata;
- struct cfg80211_chan_def chandef = {};
- u32 changed = 0;
-- int power;
-+ int power, max_power;
- u32 offchannel_flag;
-
- offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
-@@ -157,6 +157,12 @@ static u32 ieee80211_hw_conf_chan(struct
- }
- rcu_read_unlock();
-
-+ max_power = chandef.chan->max_reg_power;
-+ if (local->user_antenna_gain > 0) {
-+ max_power -= local->user_antenna_gain;
-+ power = min(power, max_power);
-+ }
-+
- if (local->hw.conf.power_level != power) {
- changed |= IEEE80211_CONF_CHANGE_POWER;
- local->hw.conf.power_level = power;
-@@ -762,6 +768,7 @@ struct ieee80211_hw *ieee80211_alloc_hw_
- IEEE80211_RADIOTAP_MCS_HAVE_BW;
- local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
- IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
-+ local->user_antenna_gain = 0;
- local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
- local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
- local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
---- a/net/wireless/nl80211.c
-+++ b/net/wireless/nl80211.c
-@@ -799,6 +799,7 @@ static const struct nla_policy nl80211_p
- [NL80211_ATTR_MLD_ADDR] = NLA_POLICY_EXACT_LEN(ETH_ALEN),
- [NL80211_ATTR_MLO_SUPPORT] = { .type = NLA_FLAG },
- [NL80211_ATTR_MAX_NUM_AKM_SUITES] = { .type = NLA_REJECT },
-+ [NL80211_ATTR_WIPHY_ANTENNA_GAIN] = { .type = NLA_U32 },
- };
-
- /* policy for the key attributes */
-@@ -3511,6 +3512,22 @@ static int nl80211_set_wiphy(struct sk_b
- if (result)
- goto out;
- }
-+
-+ if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_GAIN]) {
-+ int idx, dbi = 0;
-+
-+ if (!rdev->ops->set_antenna_gain) {
-+ result = -EOPNOTSUPP;
-+ goto out;
-+ }
-+
-+ 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 out;
-+ }
-
- if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
- struct wireless_dev *txp_wdev = wdev;
projects / openwrt / openwrt.git / blobdiff