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wifi: cfg80211: add helper for checking if a chandef is valid on a radio

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Check if the full channel width is in the radio's frequency range.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://patch.msgid.link/7c8ea146feb6f37cee62e5ba6be5370403695797.1720514221.git-series.nbd@nbd.name
[add missing Return: documentation]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2024-07-09 10:38:32 +02:00 committed by Johannes Berg
parent abb4cfe366
commit 510dba80ed
2 changed files with 46 additions and 0 deletions
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11
include/net/cfg80211.h
View File

@ -6508,6 +6508,17 @@ static inline bool cfg80211_channel_is_psc(struct ieee80211_channel *chan)
return ieee80211_frequency_to_channel(chan->center_freq) % 16 == 5;
}
/**
* cfg80211_radio_chandef_valid - Check if the radio supports the chandef
*
* @radio: wiphy radio
* @chandef: chandef for current channel
*
* Return: whether or not the given chandef is valid for the given radio
*/
bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
const struct cfg80211_chan_def *chandef);
/**
* ieee80211_get_response_rate - get basic rate for a given rate
*

35
net/wireless/util.c
View File

@ -2886,3 +2886,38 @@ cfg80211_get_iftype_ext_capa(struct wiphy *wiphy, enum nl80211_iftype type)
return NULL;
}
EXPORT_SYMBOL(cfg80211_get_iftype_ext_capa);
static bool
ieee80211_radio_freq_range_valid(const struct wiphy_radio *radio,
u32 freq, u32 width)
{
const struct wiphy_radio_freq_range *r;
int i;
for (i = 0; i < radio->n_freq_range; i++) {
r = &radio->freq_range[i];
if (freq - width / 2 >= r->start_freq &&
freq + width / 2 <= r->end_freq)
return true;
}
return false;
}
bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
const struct cfg80211_chan_def *chandef)
{
u32 freq, width;
freq = ieee80211_chandef_to_khz(chandef);
width = nl80211_chan_width_to_mhz(chandef->width);
if (!ieee80211_radio_freq_range_valid(radio, freq, width))
return false;
freq = MHZ_TO_KHZ(chandef->center_freq2);
if (freq && !ieee80211_radio_freq_range_valid(radio, freq, width))
return false;
return true;
}
EXPORT_SYMBOL(cfg80211_radio_chandef_valid);