Commit df42bfc9 authored by Vasanthakumar Thiagarajan's avatar Vasanthakumar Thiagarajan Committed by Johannes Berg
Browse files

wifi: cfg80211: Add utility API to get radio index from channel 



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: default avatarVasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Co-developed-by: default avatarRaj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Signed-off-by: default avatarRaj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Link: https://patch.msgid.link/20250527-mlo-dfs-acs-v2-1-92c2f37c81d9@quicinc.com


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent aa34ecc4

include/net/cfg80211.h

+11 −0
Original line number Diff line number Diff line
@@ -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

net/wireless/util.c

+24 −0
Original line number Diff line number Diff line
@@ -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)