[PATCH wireless-next v4 2/3] wifi: mac80211: add support to handle incumbent signal detected event from driver

[Amith A <amith.a@oss.qualcomm.com>]

From: Hari Chandrakanthan <quic_haric@quicinc.com>

Add a new API ieee80211_incumbent_signal_detected() that can be used by
wireless drivers to notify the higher layers about the interference of
incumbent signals in 6 GHz band with the operating channel (mandatory to
pass during MLO) and the interference bitmap in which each bit denotes
the affected 20 MHz in the operating channel.

Signed-off-by: Hari Chandrakanthan <quic_haric@quicinc.com>
Co-developed-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Signed-off-by: Amith A <amith.a@oss.qualcomm.com>
---
 include/net/mac80211.h | 14 ++++++++++++++
 net/mac80211/trace.h   | 26 ++++++++++++++++++++++++++
 net/mac80211/util.c    | 14 ++++++++++++++
 3 files changed, 54 insertions(+)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 36ae7fe9ddf3..d586eab10f26 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -7899,4 +7899,18 @@ int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw,
  * Return: %true iff the vif is a NAN interface and NAN is started
  */
 bool ieee80211_vif_nan_started(struct ieee80211_vif *vif);
+
+/**
+ * ieee80211_incumbent_signal_detected - inform that an incumbent signal
+ *	interference was detected
+ * @hw: pointer as obtained from ieee80211_alloc_hw()
+ * @chanctx_conf: Channel context on which the signal interference was detected.
+ *	Mandatory to pass a valid pointer for MLO. For non-MLO %NULL can be
+ *	passed
+ * @incumbt_sig_intf_bmap: Bitmap indicating where the incumbent signal was
+ *	detected.
+ */
+void ieee80211_incumbent_signal_detected(struct ieee80211_hw *hw,
+					 struct ieee80211_chanctx_conf *chanctx_conf,
+					 u32 incumbt_sig_intf_bmap);
 #endif /* MAC80211_H */
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index 0bfbce157486..74741a61546c 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -3136,6 +3136,32 @@ TRACE_EVENT(api_radar_detected,
 	)
 );
 
+TRACE_EVENT(api_incumbent_signal_detected,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_chanctx_conf *chanctx_conf,
+		 u32 bitmap),
+
+	TP_ARGS(local, chanctx_conf, bitmap),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		CHANDEF_ENTRY
+		__field(u32, bitmap)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		CHANDEF_ASSIGN(&chanctx_conf->def)
+		__entry->bitmap = bitmap;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT " Incumbent signal detected."
+		CHANDEF_PR_FMT " Bitmap: 0x%x ",
+		LOCAL_PR_ARG, CHANDEF_PR_ARG, __entry->bitmap
+	)
+);
+
 TRACE_EVENT(api_request_smps,
 	TP_PROTO(struct ieee80211_local *local,
 		 struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 4d5680da7aa0..0e1ee2559130 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -3670,6 +3670,20 @@ void ieee80211_radar_detected(struct ieee80211_hw *hw,
 }
 EXPORT_SYMBOL(ieee80211_radar_detected);
 
+void ieee80211_incumbent_signal_detected(struct ieee80211_hw *hw,
+					 struct ieee80211_chanctx_conf *chanctx_conf,
+					 u32 incumbt_sig_intf_bmap)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_incumbent_signal_detected(local, chanctx_conf, incumbt_sig_intf_bmap);
+	cfg80211_incumbent_signal_notify(hw->wiphy,
+					 &chanctx_conf->def,
+					 incumbt_sig_intf_bmap,
+					 GFP_ATOMIC);
+}
+EXPORT_SYMBOL(ieee80211_incumbent_signal_detected);
+
 void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c,
 				 struct ieee80211_conn_settings *conn)
 {
-- 
2.34.1