--- /dev/null
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Wed, 22 Oct 2014 17:55:50 +0200
+Subject: [PATCH] mac80211: add support for driver tx power reporting
+
+The configured tx power is often limited by hardware capabilities,
+channel settings, antenna configuration, etc.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -2838,6 +2838,9 @@ enum ieee80211_roc_type {
+ * @get_expected_throughput: extract the expected throughput towards the
+ * specified station. The returned value is expressed in Kbps. It returns 0
+ * if the RC algorithm does not have proper data to provide.
++ *
++ * @get_txpower: get current maximum tx power (in dBm) based on configuration
++ * and hardware limits.
+ */
+ struct ieee80211_ops {
+ void (*tx)(struct ieee80211_hw *hw,
+@@ -3039,6 +3042,8 @@ struct ieee80211_ops {
+ int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
+ void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
+ u32 (*get_expected_throughput)(struct ieee80211_sta *sta);
++ int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
++ int *dbm);
+ };
+
+ /**
+--- a/net/mac80211/cfg.c
++++ b/net/mac80211/cfg.c
+@@ -2081,6 +2081,9 @@ static int ieee80211_get_tx_power(struct
+ struct ieee80211_local *local = wiphy_priv(wiphy);
+ struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+
++ if (local->ops->get_txpower)
++ return local->ops->get_txpower(&local->hw, &sdata->vif, dbm);
++
+ if (!local->use_chanctx)
+ *dbm = local->hw.conf.power_level;
+ else
--- /dev/null
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Wed, 22 Oct 2014 18:16:14 +0200
+Subject: [PATCH] ath9k_common: always update value in
+ ath9k_cmn_update_txpow
+
+In some cases the limit may be the same as reg->power_limit, but the
+actual value that the hardware uses is not up to date. In that case, a
+wrong value for current tx power is tracked internally.
+Fix this by unconditionally updating it.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/common.c
++++ b/drivers/net/wireless/ath/ath9k/common.c
+@@ -368,11 +368,11 @@ void ath9k_cmn_update_txpow(struct ath_h
+ {
+ struct ath_regulatory *reg = ath9k_hw_regulatory(ah);
+
+- if (reg->power_limit != new_txpow) {
++ if (reg->power_limit != new_txpow)
+ ath9k_hw_set_txpowerlimit(ah, new_txpow, false);
+- /* read back in case value is clamped */
+- *txpower = reg->max_power_level;
+- }
++
++ /* read back in case value is clamped */
++ *txpower = reg->max_power_level;
+ }
+ EXPORT_SYMBOL(ath9k_cmn_update_txpow);
+
--- /dev/null
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Wed, 22 Oct 2014 18:18:04 +0200
+Subject: [PATCH] ath9k: add support for reporting tx power to mac80211
+
+Track it per channel context instead of in the softc
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -347,6 +347,7 @@ struct ath_chanctx {
+
+ int flush_timeout;
+ u16 txpower;
++ u16 cur_txpower;
+ bool offchannel;
+ bool stopped;
+ bool active;
+@@ -987,7 +988,6 @@ struct ath_softc {
+ u8 gtt_cnt;
+ u32 intrstatus;
+ u16 ps_flags; /* PS_* */
+- u16 curtxpow;
+ bool ps_enabled;
+ bool ps_idle;
+ short nbcnvifs;
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -172,17 +172,20 @@ static void ath9k_reg_notifier(struct wi
+ ath_reg_notifier_apply(wiphy, request, reg);
+
+ /* Set tx power */
+- if (ah->curchan) {
+- sc->cur_chan->txpower = 2 * ah->curchan->chan->max_power;
+- ath9k_ps_wakeup(sc);
+- ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
+- sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
+- /* synchronize DFS detector if regulatory domain changed */
+- if (sc->dfs_detector != NULL)
+- sc->dfs_detector->set_dfs_domain(sc->dfs_detector,
+- request->dfs_region);
+- ath9k_ps_restore(sc);
+- }
++ if (!ah->curchan)
++ return;
++
++ sc->cur_chan->txpower = 2 * ah->curchan->chan->max_power;
++ ath9k_ps_wakeup(sc);
++ ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
++ ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
++ sc->cur_chan->txpower,
++ &sc->cur_chan->cur_txpower);
++ /* synchronize DFS detector if regulatory domain changed */
++ if (sc->dfs_detector != NULL)
++ sc->dfs_detector->set_dfs_domain(sc->dfs_detector,
++ request->dfs_region);
++ ath9k_ps_restore(sc);
+ }
+
+ /*
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -233,8 +233,9 @@ static bool ath_complete_reset(struct at
+
+ ath9k_calculate_summary_state(sc, sc->cur_chan);
+ ath_startrecv(sc);
+- ath9k_cmn_update_txpow(ah, sc->curtxpow,
+- sc->cur_chan->txpower, &sc->curtxpow);
++ ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
++ sc->cur_chan->txpower,
++ &sc->cur_chan->cur_txpower);
+ clear_bit(ATH_OP_HW_RESET, &common->op_flags);
+
+ if (!sc->cur_chan->offchannel && start) {
+@@ -1471,8 +1472,9 @@ static int ath9k_config(struct ieee80211
+ if (changed & IEEE80211_CONF_CHANGE_POWER) {
+ ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
+ sc->cur_chan->txpower = 2 * conf->power_level;
+- ath9k_cmn_update_txpow(ah, sc->curtxpow,
+- sc->cur_chan->txpower, &sc->curtxpow);
++ ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
++ sc->cur_chan->txpower,
++ &sc->cur_chan->cur_txpower);
+ }
+
+ mutex_unlock(&sc->mutex);
+@@ -2594,6 +2596,24 @@ void ath9k_fill_chanctx_ops(void)
+
+ #endif
+
++static int ath9k_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
++ int *dbm)
++{
++ struct ath_softc *sc = hw->priv;
++ struct ath_vif *avp = (void *)vif->drv_priv;
++
++ mutex_lock(&sc->mutex);
++ if (avp->chanctx)
++ *dbm = avp->chanctx->cur_txpower;
++ else
++ *dbm = sc->cur_chan->cur_txpower;
++ mutex_unlock(&sc->mutex);
++
++ *dbm /= 2;
++
++ return 0;
++}
++
+ struct ieee80211_ops ath9k_ops = {
+ .tx = ath9k_tx,
+ .start = ath9k_start,
+@@ -2640,4 +2660,5 @@ struct ieee80211_ops ath9k_ops = {
+ #endif
+ .sw_scan_start = ath9k_sw_scan_start,
+ .sw_scan_complete = ath9k_sw_scan_complete,
++ .get_txpower = ath9k_get_txpower,
+ };
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
-@@ -677,6 +677,7 @@ static const struct ieee80211_iface_limi
+@@ -680,6 +680,7 @@ static const struct ieee80211_iface_limi
BIT(NL80211_IFTYPE_AP) },
{ .max = 1, .types = BIT(NL80211_IFTYPE_P2P_CLIENT) |
BIT(NL80211_IFTYPE_P2P_GO) },
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
-@@ -986,23 +986,23 @@ static int __init ath9k_init(void)
+@@ -989,23 +989,23 @@ static int __init ath9k_init(void)
{
int error;
+++ /dev/null
---- a/include/net/mac80211.h
-+++ b/include/net/mac80211.h
-@@ -1754,6 +1754,7 @@ struct ieee80211_hw {
- u8 max_tx_aggregation_subframes;
- u8 offchannel_tx_hw_queue;
- u8 radiotap_mcs_details;
-+ s8 cur_power_level;
- u16 radiotap_vht_details;
- netdev_features_t netdev_features;
- u8 uapsd_queues;
---- a/net/mac80211/cfg.c
-+++ b/net/mac80211/cfg.c
-@@ -2081,7 +2081,9 @@ static int ieee80211_get_tx_power(struct
- struct ieee80211_local *local = wiphy_priv(wiphy);
- struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
-
-- if (!local->use_chanctx)
-+ if (local->hw.cur_power_level)
-+ *dbm = local->hw.cur_power_level;
-+ else if (!local->use_chanctx)
- *dbm = local->hw.conf.power_level;
- else
- *dbm = sdata->vif.bss_conf.txpower;
---- a/net/mac80211/main.c
-+++ b/net/mac80211/main.c
-@@ -157,6 +157,7 @@ static u32 ieee80211_hw_conf_chan(struct
-
- if (local->hw.conf.power_level != power) {
- changed |= IEEE80211_CONF_CHANGE_POWER;
-+ local->hw.cur_power_level = power;
- local->hw.conf.power_level = power;
- }
-
+++ /dev/null
---- a/drivers/net/wireless/ath/ath9k/main.c
-+++ b/drivers/net/wireless/ath/ath9k/main.c
-@@ -326,8 +326,12 @@ static int ath_reset_internal(struct ath
- sc->cur_chan->offchannel)
- ath9k_mci_set_txpower(sc, true, false);
-
-- if (!ath_complete_reset(sc, true))
-+ if (!ath_complete_reset(sc, true)) {
- r = -EIO;
-+ goto out;
-+ }
-+
-+ sc->hw->cur_power_level = sc->curtxpow / 2;
-
- out:
- spin_unlock_bh(&sc->sc_pcu_lock);
-@@ -1473,6 +1477,7 @@ static int ath9k_config(struct ieee80211
- sc->cur_chan->txpower = 2 * conf->power_level;
- ath9k_cmn_update_txpow(ah, sc->curtxpow,
- sc->cur_chan->txpower, &sc->curtxpow);
-+ hw->cur_power_level = sc->curtxpow / 2;
- }
-
- mutex_unlock(&sc->mutex);
__NL80211_ATTR_AFTER_LAST,
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
-@@ -2091,6 +2091,19 @@ static int ieee80211_get_tx_power(struct
+@@ -2092,6 +2092,19 @@ static int ieee80211_get_tx_power(struct
return 0;
}
static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
const u8 *addr)
{
-@@ -3572,6 +3585,7 @@ const struct cfg80211_ops mac80211_confi
+@@ -3573,6 +3586,7 @@ 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,
+
if (local->hw.conf.power_level != power) {
changed |= IEEE80211_CONF_CHANGE_POWER;
- local->hw.cur_power_level = power;
-@@ -586,6 +592,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(
+ local->hw.conf.power_level = power;
+@@ -585,6 +591,7 @@ 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;
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
-@@ -811,6 +811,9 @@ static inline int ath9k_dump_btcoex(stru
+@@ -812,6 +812,9 @@ static inline int ath9k_dump_btcoex(stru
void ath_init_leds(struct ath_softc *sc);
void ath_deinit_leds(struct ath_softc *sc);
void ath_fill_led_pin(struct ath_softc *sc);
#else
static inline void ath_init_leds(struct ath_softc *sc)
{
-@@ -951,6 +954,13 @@ void ath_ant_comb_scan(struct ath_softc
+@@ -952,6 +955,13 @@ void ath_ant_comb_scan(struct ath_softc
#define ATH9K_NUM_CHANCTX 2 /* supports 2 operating channels */
void ath_fill_led_pin(struct ath_softc *sc)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
-@@ -899,7 +899,7 @@ int ath9k_init_device(u16 devid, struct
+@@ -902,7 +902,7 @@ int ath9k_init_device(u16 devid, struct
#ifdef CPTCFG_MAC80211_LEDS
/* must be initialized before ieee80211_register_hw */
REG_SET_BIT(ah, AR_BTCOEX_WL_LNADIV, AR_BTCOEX_WL_LNADIV_FORCE_ON);
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
-@@ -535,6 +535,11 @@ irqreturn_t ath_isr(int irq, void *dev)
+@@ -532,6 +532,11 @@ irqreturn_t ath_isr(int irq, void *dev)
ath9k_debug_sync_cause(sc, sync_cause);
status &= ah->imask; /* discard unasked-for bits */
ops->spectral_scan_config = ar9003_hw_spectral_scan_config;
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
-@@ -665,7 +665,8 @@ static void ath9k_init_txpower_limits(st
+@@ -668,7 +668,8 @@ static void ath9k_init_txpower_limits(st
if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
ath9k_init_band_txpower(sc, IEEE80211_BAND_5GHZ);
}
static const struct ieee80211_iface_limit if_limits[] = {
-@@ -856,6 +857,18 @@ static void ath9k_set_hw_capab(struct at
+@@ -859,6 +860,18 @@ static void ath9k_set_hw_capab(struct at
SET_IEEE80211_PERM_ADDR(hw, common->macaddr);
}
int ath9k_init_device(u16 devid, struct ath_softc *sc,
const struct ath_bus_ops *bus_ops)
{
-@@ -904,6 +917,8 @@ int ath9k_init_device(u16 devid, struct
+@@ -907,6 +920,8 @@ int ath9k_init_device(u16 devid, struct
ARRAY_SIZE(ath9k_tpt_blink));
#endif
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