wifi: cfg80211: send MLO links tx power info in GET_INTERFACE

Currently, TX power is reported on interface/wdev level as
part of NL80211_CMD_GET_INTERFACE. With MLO, Multiple links
can be part of an interface/wdev and hence its necessary to
report the TX power of each link.

Add support to send tx power for all valid links of an MLD as
part of NL80211_CMD_GET_INTERFACE request.

As far as userspace is concerned, there is no behavioral change
for Non-ML Interfaces. For ML interfaces, userspace should fetch
TX power that is nested inside NL80211_ATTR_MLO_LINKS, similar to
how channel info(NL80211_ATTR_WIPHY_FREQ) is fetched.

Co-developed-by: Aaradhana Sahu <quic_aarasahu@quicinc.com>
Signed-off-by: Aaradhana Sahu <quic_aarasahu@quicinc.com>
Signed-off-by: Rameshkumar Sundaram <quic_ramess@quicinc.com>
Link: https://patch.msgid.link/20241125083217.216095-2-quic_ramess@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

12 files changed, 47 insertions, 34 deletions

diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 61b2e3f15f0e..72ce321f2a77 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -1441,6 +1441,7 @@ static int ath6kl_cfg80211_set_txpower(struct wiphy *wiphy,
 
 static int ath6kl_cfg80211_get_txpower(struct wiphy *wiphy,
 				       struct wireless_dev *wdev,
+				       unsigned int link_id,
 				       int *dbm)
 {
 	struct ath6kl *ar = (struct ath6kl *)wiphy_priv(wiphy);
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 297a7c738c01..689e779fe00f 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -2676,7 +2676,7 @@ done:
 
 static s32
 brcmf_cfg80211_get_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
-			    s32 *dbm)
+			    unsigned int link_id, s32 *dbm)
 {
 	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 	struct brcmf_cfg80211_vif *vif = wdev_to_vif(wdev);
diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index fca3eea7ee84..a099fdaafa45 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -410,7 +410,7 @@ mwifiex_cfg80211_set_tx_power(struct wiphy *wiphy,
 static int
 mwifiex_cfg80211_get_tx_power(struct wiphy *wiphy,
 			      struct wireless_dev *wdev,
-			      int *dbm)
+			      unsigned int link_id, int *dbm)
 {
 	struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
 	struct mwifiex_private *priv = mwifiex_get_priv(adapter,
diff --git a/drivers/net/wireless/microchip/wilc1000/cfg80211.c b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
index e96736cc7259..e7aa0f991923 100644
--- a/drivers/net/wireless/microchip/wilc1000/cfg80211.c
+++ b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
@@ -1669,7 +1669,7 @@ static int set_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
 }
 
 static int get_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
-			int *dbm)
+			unsigned int link_id, int *dbm)
 {
 	int ret;
 	struct wilc_vif *vif = netdev_priv(wdev->netdev);
diff --git a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
index 8b97accf6638..0b2282528342 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
@@ -881,7 +881,7 @@ static int qtnf_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
 }
 
 static int qtnf_get_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
-			     int *dbm)
+			     unsigned int link_id, int *dbm)
 {
 	struct qtnf_vif *vif = qtnf_netdev_get_priv(wdev->netdev);
 	int ret;
diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
index c053ee9c1361..7fcc46a0bb48 100644
--- a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
+++ b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
@@ -1802,7 +1802,8 @@ static int cfg80211_rtw_set_txpower(struct wiphy *wiphy,
 }
 
 static int cfg80211_rtw_get_txpower(struct wiphy *wiphy,
-				    struct wireless_dev *wdev, int *dbm)
+				    struct wireless_dev *wdev,
+				    unsigned int link_id, int *dbm)
 {
 	*dbm = (12);
 
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 63e79a22a214..0a48f47a77dc 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -4733,7 +4733,7 @@ struct cfg80211_ops {
 	int	(*set_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
 				enum nl80211_tx_power_setting type, int mbm);
 	int	(*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
-				int *dbm);
+				unsigned int link_id, int *dbm);
 
 	void	(*rfkill_poll)(struct wiphy *wiphy);
 
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 61a824ec33da..b2410a913556 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -3190,6 +3190,7 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy,
 
 static int ieee80211_get_tx_power(struct wiphy *wiphy,
 				  struct wireless_dev *wdev,
+				  unsigned int link_id,
 				  int *dbm)
 {
 	struct ieee80211_local *local = wiphy_priv(wiphy);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 9590f9bd2ec0..793d910347e3 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3980,10 +3980,10 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flag
 			goto nla_put_failure;
 	}
 
-	if (rdev->ops->get_tx_power) {
+	if (rdev->ops->get_tx_power && !wdev->valid_links) {
 		int dbm, ret;
 
-		ret = rdev_get_tx_power(rdev, wdev, &dbm);
+		ret = rdev_get_tx_power(rdev, wdev, 0, &dbm);
 		if (ret == 0 &&
 		    nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
 				DBM_TO_MBM(dbm)))
@@ -4052,6 +4052,15 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flag
 			if (ret == 0 && nl80211_send_chandef(msg, &chandef))
 				goto nla_put_failure;
 
+			if (rdev->ops->get_tx_power) {
+				int dbm, ret;
+
+				ret = rdev_get_tx_power(rdev, wdev, link_id, &dbm);
+				if (ret == 0 &&
+				    nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
+						DBM_TO_MBM(dbm)))
+					goto nla_put_failure;
+			}
 			nla_nest_end(msg, link);
 		}
 
diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h
index adb6105bbb7d..8f2aa7e76c0a 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -600,11 +600,12 @@ static inline int rdev_set_tx_power(struct cfg80211_registered_device *rdev,
 }
 
 static inline int rdev_get_tx_power(struct cfg80211_registered_device *rdev,
-				    struct wireless_dev *wdev, int *dbm)
+				    struct wireless_dev *wdev, unsigned int link_id,
+				    int *dbm)
 {
 	int ret;
-	trace_rdev_get_tx_power(&rdev->wiphy, wdev);
-	ret = rdev->ops->get_tx_power(&rdev->wiphy, wdev, dbm);
+	trace_rdev_get_tx_power(&rdev->wiphy, wdev, link_id);
+	ret = rdev->ops->get_tx_power(&rdev->wiphy, wdev, link_id, dbm);
 	trace_rdev_return_int_int(&rdev->wiphy, ret, *dbm);
 	return ret;
 }
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index d5c9bb614fa6..a57210c8087c 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -1690,9 +1690,28 @@ TRACE_EVENT(rdev_set_wiphy_params,
 		  WIPHY_PR_ARG, __entry->changed)
 );
 
-DEFINE_EVENT(wiphy_wdev_evt, rdev_get_tx_power,
-	TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev),
-	TP_ARGS(wiphy, wdev)
+DECLARE_EVENT_CLASS(wiphy_wdev_link_evt,
+	TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev,
+		 unsigned int link_id),
+	TP_ARGS(wiphy, wdev, link_id),
+	TP_STRUCT__entry(
+		WIPHY_ENTRY
+		WDEV_ENTRY
+		__field(unsigned int, link_id)
+	),
+	TP_fast_assign(
+		WIPHY_ASSIGN;
+		WDEV_ASSIGN;
+		__entry->link_id = link_id;
+	),
+	TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT ", link_id: %u",
+		  WIPHY_PR_ARG, WDEV_PR_ARG, __entry->link_id)
+);
+
+DEFINE_EVENT(wiphy_wdev_link_evt, rdev_get_tx_power,
+	TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev,
+		 unsigned int link_id),
+	TP_ARGS(wiphy, wdev, link_id)
 );
 
 TRACE_EVENT(rdev_set_tx_power,
@@ -2192,25 +2211,6 @@ TRACE_EVENT(rdev_set_noack_map,
 	TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", noack_map: %u",
 		  WIPHY_PR_ARG, NETDEV_PR_ARG, __entry->noack_map)
 );
-
-DECLARE_EVENT_CLASS(wiphy_wdev_link_evt,
-	TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev,
-		 unsigned int link_id),
-	TP_ARGS(wiphy, wdev, link_id),
-	TP_STRUCT__entry(
-		WIPHY_ENTRY
-		WDEV_ENTRY
-		__field(unsigned int, link_id)
-	),
-	TP_fast_assign(
-		WIPHY_ASSIGN;
-		WDEV_ASSIGN;
-		__entry->link_id = link_id;
-	),
-	TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT ", link_id: %u",
-		  WIPHY_PR_ARG, WDEV_PR_ARG, __entry->link_id)
-);
-
 DEFINE_EVENT(wiphy_wdev_link_evt, rdev_get_channel,
 	TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev,
 		 unsigned int link_id),
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 687f93664d1f..a74b1afc594e 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -910,7 +910,7 @@ static int cfg80211_wext_giwtxpower(struct net_device *dev,
 		return -EOPNOTSUPP;
 
 	scoped_guard(wiphy, &rdev->wiphy) {
-		err = rdev_get_tx_power(rdev, wdev, &val);
+		err = rdev_get_tx_power(rdev, wdev, 0, &val);
 	}
 	if (err)
 		return err;