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

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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>
Link: https://patch.msgid.link/20250527-mlo-dfs-acs-v2-1-92c2f37c81d9@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2025-05-27 14:11:43 +05:30 committed by Johannes Berg
parent aa34ecc42a
commit df42bfc96e
2 changed files with 35 additions and 0 deletions
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11
include/net/cfg80211.h
View File

@ -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

24
net/wireless/util.c
View File

@ -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)