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[wireless-next,1/3] wifi: cfg80211: Add utility API to get radio index from channel

Message ID 20250514-mlo-dfs-acs-v1-1-74e42a5583c6@quicinc.com
State New
Headers show
Series wifi: cfg80211/mac80211: Handle simultaneous scan and DFS operations on different radios | expand

Commit Message

Raj Kumar Bhagat May 14, 2025, 11:28 a.m. UTC 
From: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>

Add utility API cfg80211_get_radio_idx_by_chan() to retrieve the radio
index corresponding to a given channel in a multi-radio wiphy.

This utility function can be used when we want to check the radio-specific
data for a channel in a multi-radio wiphy. For example, it can help
determine the radio index required to handle a scan request. This index
can then be used to decide whether the scan can proceed without
interfering with ongoing DFS operations on another radio.

Signed-off-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Co-developed-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
---
 include/net/cfg80211.h | 11 +++++++++++
 net/wireless/util.c    | 24 ++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
diff mbox series

Patch

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index d1848dc8ec99df36592517b46d58223be9bee7e5..7719a90ab4d75045983ac8a63360fd90472cbb7d 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -9372,6 +9372,17 @@  int cfg80211_iter_combinations(struct wiphy *wiphy,
 			       void (*iter)(const struct ieee80211_iface_combination *c,
 					    void *data),
 			       void *data);
+/**
+ * cfg80211_get_radio_idx_by_chan - get the radio index by the channel
+ *
+ * @wiphy: the wiphy
+ * @chan: channel for which the supported radio index is required
+ *
+ * Return: radio index on success or a negative error code
+ */
+int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy,
+				   const struct ieee80211_channel *chan);
+
 
 /**
  * cfg80211_stop_iface - trigger interface disconnection
diff --git a/net/wireless/util.c b/net/wireless/util.c
index ed868c0f7ca8ed7a9e85e70c10a738f592eac1d6..8ba1d0b268fc350064b2b8adcfeae121c3dcab70 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -2516,6 +2516,30 @@  int cfg80211_check_combinations(struct wiphy *wiphy,
 }
 EXPORT_SYMBOL(cfg80211_check_combinations);
 
+int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy,
+				   const struct ieee80211_channel *chan)
+{
+	const struct wiphy_radio *radio;
+	int i, j;
+	u32 freq;
+
+	if (!chan)
+		return -EINVAL;
+
+	freq = ieee80211_channel_to_khz(chan);
+	for (i = 0; i < wiphy->n_radio; i++) {
+		radio = &wiphy->radio[i];
+		for (j = 0; j < radio->n_freq_range; j++) {
+			if (freq >= radio->freq_range[j].start_freq &&
+			    freq <= radio->freq_range[j].end_freq)
+				return i;
+		}
+	}
+
+	return -ENOENT;
+}
+EXPORT_SYMBOL(cfg80211_get_radio_idx_by_chan);
+
 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 			   const u8 *rates, unsigned int n_rates,
 			   u32 *mask)