diff options
| author | Hari Chandrakanthan <quic_haric@quicinc.com> | 2026-02-16 06:20:26 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2026-03-02 11:14:54 +0300 |
| commit | 6a584e336cefb230e2d981a464f4d85562eb750c (patch) | |
| tree | 371e5637ab94a47b8361155d09d336fcd541efa0 /include/net | |
| parent | f3f52e6f20ac875ebbef6bd3a235a06d9c4d3fa0 (diff) | |
| download | linux-6a584e336cefb230e2d981a464f4d85562eb750c.tar.xz | |
wifi: cfg80211: add support to handle incumbent signal detected event from mac80211/driver
When any incumbent signal is detected by an AP/mesh interface operating
in 6 GHz band, FCC mandates the AP/mesh to vacate the channels affected
by it [1].
Add a new API cfg80211_incumbent_signal_notify() that can be used
by mac80211 or drivers to notify the higher layers about the signal
interference event with the interference bitmap in which each bit
denotes the affected 20 MHz in the operating channel.
Add support for the new nl80211 event and nl80211 attribute as well to
notify userspace on the details about the interference event. Userspace is
expected to process it and take further action - vacate the channel, or
reduce the bandwidth.
[1] - https://apps.fcc.gov/kdb/GetAttachment.html?id=nXQiRC%2B4mfiA54Zha%2BrW4Q%3D%3D&desc=987594%20D02%20U-NII%206%20GHz%20EMC%20Measurement%20v03&tracking_number=277034
Signed-off-by: Hari Chandrakanthan <quic_haric@quicinc.com>
Signed-off-by: Amith A <amith.a@oss.qualcomm.com>
Link: https://patch.msgid.link/20260216032027.2310956-2-amith.a@oss.qualcomm.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/cfg80211.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index e00045c150e7..cea77bf90cfe 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -10475,4 +10475,27 @@ cfg80211_s1g_get_primary_sibling(struct wiphy *wiphy, return ieee80211_get_channel_khz(wiphy, sibling_1mhz_khz); } + +/** + * cfg80211_incumbent_signal_notify - Notify userspace of incumbent signal detection + * @wiphy: the wiphy to use + * @chandef: channel definition in which the interference was detected + * @signal_interference_bitmap: bitmap indicating interference across 20 MHz segments + * @gfp: allocation context for message creation and multicast; pass GFP_ATOMIC + * if called from atomic context (e.g. firmware event handler), otherwise + * GFP_KERNEL + * + * Use this function to notify userspace when an incumbent signal is detected on + * the operating channel in the 6 GHz band. The notification includes the + * current channel definition and a bitmap representing interference across + * the operating bandwidth. Each bit in the bitmap corresponds to a 20 MHz + * segment, with the lowest bit representing the lowest frequency segment. + * Punctured sub-channels are included in the bitmap structure but are always + * set to zero since interference detection is not performed on them. + */ +void cfg80211_incumbent_signal_notify(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef, + u32 signal_interference_bitmap, + gfp_t gfp); + #endif /* __NET_CFG80211_H */ |