diff mbox series

[RFC,01/10] cfg80211: add a helper to identify 6 GHz PSCs

Message ID 20200528114415.3596a1eedb31.Ic15e681a0e249eab7350a06ceb582cca8bb9a080@changeid
State New
Headers show
Series [RFC,01/10] cfg80211: add a helper to identify 6 GHz PSCs | expand

Commit Message

Johannes Berg May 28, 2020, 9:44 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

This allows identifying whether or not a channel is a PSC
(preferred scanning channel).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 include/net/cfg80211.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
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Patch

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e2dbc9c02ef3..a38653358885 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -5277,6 +5277,21 @@  ieee80211_get_channel(struct wiphy *wiphy, int freq)
 	return ieee80211_get_channel_khz(wiphy, MHZ_TO_KHZ(freq));
 }
 
+/**
+ * cfg80211_channel_is_psc - Check if the channel is a 6 GHz PSC
+ * @chan: control channel to check
+ *
+ * The Preferred Scanning Channels (PSC) are defined in
+ * Draft IEEE P802.11ax/D5.0, 26.17.2.3.3
+ */
+static inline bool cfg80211_channel_is_psc(struct ieee80211_channel *chan)
+{
+	if (chan->band != NL80211_BAND_6GHZ)
+		return false;
+
+	return ieee80211_frequency_to_channel(chan->center_freq) % 16 == 5;
+}
+
 /**
  * ieee80211_get_response_rate - get basic rate for a given rate
  *