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mac80211: enable TPC through mac80211 stack

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Control per packet Transmit Power Control (TPC) in lower drivers
according to TX power settings configured by the user. In particular TPC is
enabled if value passed in enum nl80211_tx_power_setting is
NL80211_TX_POWER_LIMITED (allow using less than specified from userspace),
whereas TPC is disabled if nl80211_tx_power_setting is set to
NL80211_TX_POWER_FIXED (use value configured from userspace)

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
tirimbino
Lorenzo Bianconi 10 years ago committed by Johannes Berg
parent 4b681c82d2
commit db82d8a966
5 changed files with 30 additions and 8 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 7
      include/net/mac80211.h
  2. 19
      net/mac80211/cfg.c
  3. 4
      net/mac80211/chan.c
  4. 3
      net/mac80211/ieee80211_i.h
  5. 5
      net/mac80211/iface.c

7
include/net/mac80211.h
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@ -376,6 +376,12 @@ enum ieee80211_rssi_event {
* @ssid_len: Length of SSID given in @ssid.
* @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
* @txpower: TX power in dBm
* @txpower_type: TX power adjustment used to control per packet Transmit
* Power Control (TPC) in lower driver for the current vif. In particular
* TPC is enabled if value passed in %txpower_type is
* NL80211_TX_POWER_LIMITED (allow using less than specified from
* userspace), whereas TPC is disabled if %txpower_type is set to
* NL80211_TX_POWER_FIXED (use value configured from userspace)
* @p2p_noa_attr: P2P NoA attribute for P2P powersave
*/
struct ieee80211_bss_conf {
@ -411,6 +417,7 @@ struct ieee80211_bss_conf {
size_t ssid_len;
bool hidden_ssid;
int txpower;
enum nl80211_tx_power_setting txpower_type;
struct ieee80211_p2p_noa_attr p2p_noa_attr;
};

19
net/mac80211/cfg.c
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@ -2110,6 +2110,8 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy,
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct ieee80211_sub_if_data *sdata;
enum nl80211_tx_power_setting txp_type = type;
bool update_txp_type = false;
if (wdev) {
sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
@ -2117,6 +2119,7 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy,
switch (type) {
case NL80211_TX_POWER_AUTOMATIC:
sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
txp_type = NL80211_TX_POWER_LIMITED;
break;
case NL80211_TX_POWER_LIMITED:
case NL80211_TX_POWER_FIXED:
@ -2126,7 +2129,12 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy,
break;
}
ieee80211_recalc_txpower(sdata);
if (txp_type != sdata->vif.bss_conf.txpower_type) {
update_txp_type = true;
sdata->vif.bss_conf.txpower_type = txp_type;
}
ieee80211_recalc_txpower(sdata, update_txp_type);
return 0;
}
@ -2134,6 +2142,7 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy,
switch (type) {
case NL80211_TX_POWER_AUTOMATIC:
local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
txp_type = NL80211_TX_POWER_LIMITED;
break;
case NL80211_TX_POWER_LIMITED:
case NL80211_TX_POWER_FIXED:
@ -2144,10 +2153,14 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy,
}
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list)
list_for_each_entry(sdata, &local->interfaces, list) {
sdata->user_power_level = local->user_power_level;
if (txp_type != sdata->vif.bss_conf.txpower_type)
update_txp_type = true;
sdata->vif.bss_conf.txpower_type = txp_type;
}
list_for_each_entry(sdata, &local->interfaces, list)
ieee80211_recalc_txpower(sdata);
ieee80211_recalc_txpower(sdata, update_txp_type);
mutex_unlock(&local->iflist_mtx);
return 0;

4
net/mac80211/chan.c
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@ -655,7 +655,7 @@ out:
}
if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) {
ieee80211_recalc_txpower(sdata);
ieee80211_recalc_txpower(sdata, false);
ieee80211_recalc_chanctx_min_def(local, new_ctx);
}
@ -1387,7 +1387,7 @@ static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local)
ieee80211_bss_info_change_notify(sdata,
changed);
ieee80211_recalc_txpower(sdata);
ieee80211_recalc_txpower(sdata, false);
}
ieee80211_recalc_chanctx_chantype(local, ctx);

3
net/mac80211/ieee80211_i.h
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@ -1621,7 +1621,8 @@ int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
bool update_bss);
static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
{

5
net/mac80211/iface.c
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@ -73,9 +73,10 @@ bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
return false;
}
void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
bool update_bss)
{
if (__ieee80211_recalc_txpower(sdata))
if (__ieee80211_recalc_txpower(sdata) || update_bss)
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
}

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