[mac80211-next,0/4] add offchannel radar chain support

Message

Lorenzo Bianconi Oct. 19, 2021, 11:59 a.m. UTC

Introduce the capability to configure a dedicated chain available for radar
detection on some hw (e.g. mt7915). The driver is supposed to implement CAC
management in sw or fw while hostapd will implement the logic to select and
configure the monitored channel.
Using a dedicated chain to perform the CAC, the AP can avoid the CAC downtime
switching to a new DFS channel.

Changes since rfc:
- rely on NL80211_CMD_RADAR_DETECT netlink msg to configure offchannel radar
  chain

Lorenzo Bianconi (4):
  mac80211: introduce set_radar_offchan callback
  cfg80211: introduce NL80211_ATTR_RADAR_OFFCHAN netlink attribute
  cfg80211: introduce cfg80211_cac_offchan_event routine
  cfg80211: introduce NL80211_EXT_FEATURE_RADAR_OFFCHAN feature flag

 include/net/cfg80211.h       | 19 +++++++++++++++++++
 include/net/mac80211.h       |  5 +++++
 include/uapi/linux/nl80211.h | 10 ++++++++++
 net/mac80211/cfg.c           | 13 +++++++++++++
 net/wireless/mlme.c          | 26 ++++++++++++++++++++++++++
 net/wireless/nl80211.c       | 16 ++++++++++++++--
 net/wireless/rdev-ops.h      | 17 +++++++++++++++++
 net/wireless/trace.h         | 19 +++++++++++++++++++
 8 files changed, 123 insertions(+), 2 deletions(-)