[PATCH wireless-next] wifi: radiotap: add field for information about observed energy

[Miri Korenblit <miriam.rachel.korenblit@intel.com>]

From: Benjamin Berg <benjamin.berg@intel.com>

This can be used to report some information about frames that are
duplicated across multiple channels. The reported information may just
be an estimate based on the energy observed on each subchannel. An
example of such duplication are RTS frames that are sent using a legacy
rate but are duplicated into multiple subchannels for compatibility.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 include/net/ieee80211_radiotap.h | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index 6c2210a253cd..11c1544bc449 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2017		Intel Deutschland GmbH
- * Copyright (c) 2018-2019, 2021-2022, 2025 Intel Corporation
+ * Copyright (c) 2018-2019, 2021-2022, 2025-2026 Intel Corporation
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -95,6 +95,7 @@ enum ieee80211_radiotap_presence {
 	IEEE80211_RADIOTAP_EXT = 31,
 	IEEE80211_RADIOTAP_EHT_USIG = 33,
 	IEEE80211_RADIOTAP_EHT = 34,
+	IEEE80211_RADIOTAP_OBSERVED_ENERGY = 35,
 	IEEE80211_RADIOTAP_UHR_ELR = 37,
 	IEEE80211_RADIOTAP_UHR = 38,
 };
@@ -604,6 +605,25 @@ enum ieee80211_radiotap_eht_usig_tb {
 	IEEE80211_RADIOTAP_EHT_USIG2_TB_B20_B25_TAIL		= 0xfc000000,
 };
 
+/* for IEEE80211_RADIOTAP_OBSERVED_ENERGY */
+enum ieee80211_radiotap_observed_energy_known {
+	IEEE80211_RADIOTAP_OBSERVED_ENERGY_KNOWN_BW		= 0x0001,
+};
+
+/**
+ * struct ieee80211_radiotap_observed_energy - Observed Energy (type 35)
+ * see www.radiotap.org/fields/observed%20energy.html for details.
+ *
+ * @known: Bitmap indicating which information is present
+ * @bw: The bandwidth in MHz sufficient to contain all subchannels where energy
+ *	likely belonging to the same transmission was observed. This may
+ *	indicate that the transmission was duplicated on multiple channels.
+ */
+struct ieee80211_radiotap_observed_energy {
+	__le16 known;
+	__le16 bw;
+} __packed;
+
 /*
  * ieee80211_radiotap_uhr_elr - content of UHR-ELR TLV (type 35)
  * see https://www.radiotap.org/fields/UHR-ELR for details
-- 
2.34.1