From: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@xxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxx>
Co-developed-by: Raj Kumar Bhagat <quic_rajkbhag@xxxxxxxxxxx>
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@xxxxxxxxxxx>
---
include/net/cfg80211.h | 11 +++++++++++
net/wireless/util.c | 24 ++++++++++++++++++++++++
2 files changed, 35 insertions(+)
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..e438f883f085b3aed0c0438d94957f08aa2c6688 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)
--
2.34.1
