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From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sat, 23 Oct 2021 11:10:51 +0200
Subject: [PATCH] mac80211: introduce set_radar_offchan callback
Similar to cfg80211, introduce set_radar_offchan callback in mac80211_ops
in order to configure a dedicated offchannel chain available on some hw
(e.g. mt7915) to perform offchannel CAC detection and avoid tx/rx downtime.
Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/201110606d4f3a7dfdf31440e351f2e2c375d4f0.1634979655.git.lorenzo@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3937,6 +3937,14 @@ struct ieee80211_prep_tx_info {
* twt structure.
* @twt_teardown_request: Update the hw with TWT teardown request received
* from the peer.
+ * @set_radar_offchan: Configure dedicated offchannel chain available for
+ * radar/CAC detection on some hw. This chain can't be used to transmit
+ * or receive frames and it is bounded to a running wdev.
+ * Offchannel radar/CAC detection allows to avoid the CAC downtime
+ * switching to a different channel during CAC detection on the selected
+ * radar channel.
+ * The caller is expected to set chandef pointer to NULL in order to
+ * disable offchannel CAC/radar detection.
* @net_fill_forward_path: Called from .ndo_fill_forward_path in order to
* resolve a path for hardware flow offloading
*/
@@ -4267,6 +4275,8 @@ struct ieee80211_ops {
struct ieee80211_twt_setup *twt);
void (*twt_teardown_request)(struct ieee80211_hw *hw,
struct ieee80211_sta *sta, u8 flowid);
+ int (*set_radar_offchan)(struct ieee80211_hw *hw,
+ struct cfg80211_chan_def *chandef);
#if LINUX_VERSION_IS_GEQ(5,10,0)
int (*net_fill_forward_path)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -4341,6 +4341,18 @@ out:
return err;
}
+static int
+ieee80211_set_radar_offchan(struct wiphy *wiphy,
+ struct cfg80211_chan_def *chandef)
+{
+ struct ieee80211_local *local = wiphy_priv(wiphy);
+
+ if (!local->ops->set_radar_offchan)
+ return -EOPNOTSUPP;
+
+ return local->ops->set_radar_offchan(&local->hw, chandef);
+}
+
const struct cfg80211_ops mac80211_config_ops = {
.add_virtual_intf = ieee80211_add_iface,
.del_virtual_intf = ieee80211_del_iface,
@@ -4445,4 +4457,5 @@ const struct cfg80211_ops mac80211_confi
.reset_tid_config = ieee80211_reset_tid_config,
.set_sar_specs = ieee80211_set_sar_specs,
.color_change = ieee80211_color_change,
+ .set_radar_offchan = ieee80211_set_radar_offchan,
};
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