--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Sat, 23 Oct 2021 11:10:50 +0200
+Subject: [PATCH] cfg80211: implement APIs for dedicated radar detection HW
+
+If a dedicated (off-channel) radar detection hardware (chain)
+is available in the hardware/driver, allow this to be used by
+calling the NL80211_CMD_RADAR_DETECT command with a new flag
+attribute requesting off-channel radar detection is used.
+
+Offchannel CAC (channel availability check) avoids the CAC
+downtime when switching to a radar channel or when turning on
+the AP.
+
+Drivers advertise support for this using the new feature flag
+NL80211_EXT_FEATURE_RADAR_OFFCHAN.
+
+Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Link: https://lore.kernel.org/r/7468e291ef5d05d692c1738d25b8f778d8ea5c3f.1634979655.git.lorenzo@kernel.org
+Link: https://lore.kernel.org/r/1e60e60fef00e14401adae81c3d49f3e5f307537.1634979655.git.lorenzo@kernel.org
+Link: https://lore.kernel.org/r/85fa50f57fc3adb2934c8d9ca0be30394de6b7e8.1634979655.git.lorenzo@kernel.org
+Link: https://lore.kernel.org/r/4b6c08671ad59aae0ac46fc94c02f31b1610eb72.1634979655.git.lorenzo@kernel.org
+Link: https://lore.kernel.org/r/241849ccaf2c228873c6f8495bf87b19159ba458.1634979655.git.lorenzo@kernel.org
+[remove offchan_mutex, fix cfg80211_stop_offchan_radar_detection(),
+ remove gfp_t argument, fix documentation, fix tracing]
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/include/net/cfg80211.h
++++ b/include/net/cfg80211.h
+@@ -4057,6 +4057,15 @@ struct mgmt_frame_regs {
+ * @set_sar_specs: Update the SAR (TX power) settings.
+ *
+ * @color_change: Initiate a color change.
++ *
++ * @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.
+ */
+ struct cfg80211_ops {
+ int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
+@@ -4387,6 +4396,8 @@ struct cfg80211_ops {
+ int (*color_change)(struct wiphy *wiphy,
+ struct net_device *dev,
+ struct cfg80211_color_change_settings *params);
++ int (*set_radar_offchan)(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef);
+ };
+
+ /*
+@@ -7608,6 +7619,20 @@ void cfg80211_cac_event(struct net_devic
+ const struct cfg80211_chan_def *chandef,
+ enum nl80211_radar_event event, gfp_t gfp);
+
++/**
++ * cfg80211_offchan_cac_event - Channel Availability Check (CAC) offchan event
++ * @wiphy: the wiphy
++ * @chandef: chandef for the current channel
++ * @event: type of event
++ *
++ * This function is called when a Channel Availability Check (CAC) is finished,
++ * started or aborted by a offchannel dedicated chain.
++ *
++ * Note that this acquires the wiphy lock.
++ */
++void cfg80211_offchan_cac_event(struct wiphy *wiphy,
++ const struct cfg80211_chan_def *chandef,
++ enum nl80211_radar_event event);
+
+ /**
+ * cfg80211_gtk_rekey_notify - notify userspace about driver rekeying
+--- a/include/uapi/linux/nl80211.h
++++ b/include/uapi/linux/nl80211.h
+@@ -2608,6 +2608,13 @@ enum nl80211_commands {
+ * Mandatory parameter for the transmitting interface to enable MBSSID.
+ * Optional for the non-transmitting interfaces.
+ *
++ * @NL80211_ATTR_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 on a different channel during CAC detection on the selected
++ * radar channel.
++ *
+ * @NUM_NL80211_ATTR: total number of nl80211_attrs available
+ * @NL80211_ATTR_MAX: highest attribute number currently defined
+ * @__NL80211_ATTR_AFTER_LAST: internal use
+@@ -3114,6 +3121,8 @@ enum nl80211_attrs {
+ NL80211_ATTR_MBSSID_CONFIG,
+ NL80211_ATTR_MBSSID_ELEMS,
+
++ NL80211_ATTR_RADAR_OFFCHAN,
++
+ /* add attributes here, update the policy in nl80211.c */
+
+ __NL80211_ATTR_AFTER_LAST,
+@@ -6013,6 +6022,9 @@ enum nl80211_feature_flags {
+ * @NL80211_EXT_FEATURE_BSS_COLOR: The driver supports BSS color collision
+ * detection and change announcemnts.
+ *
++ * @NL80211_EXT_FEATURE_RADAR_OFFCHAN: Device supports offchannel radar/CAC
++ * detection.
++ *
+ * @NUM_NL80211_EXT_FEATURES: number of extended features.
+ * @MAX_NL80211_EXT_FEATURES: highest extended feature index.
+ */
+@@ -6078,6 +6090,7 @@ enum nl80211_ext_feature_index {
+ NL80211_EXT_FEATURE_SECURE_RTT,
+ NL80211_EXT_FEATURE_PROT_RANGE_NEGO_AND_MEASURE,
+ NL80211_EXT_FEATURE_BSS_COLOR,
++ NL80211_EXT_FEATURE_RADAR_OFFCHAN,
+
+ /* add new features before the definition below */
+ NUM_NL80211_EXT_FEATURES,
+--- a/net/wireless/core.c
++++ b/net/wireless/core.c
+@@ -552,6 +552,7 @@ use_default_name:
+ INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
+ INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
+ INIT_WORK(&rdev->event_work, cfg80211_event_work);
++ INIT_DELAYED_WORK(&rdev->offchan_cac_work, cfg80211_offchan_cac_work);
+
+ init_waitqueue_head(&rdev->dev_wait);
+
+@@ -1214,6 +1215,8 @@ void __cfg80211_leave(struct cfg80211_re
+
+ cfg80211_pmsr_wdev_down(wdev);
+
++ cfg80211_stop_offchan_radar_detection(wdev);
++
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ __cfg80211_leave_ibss(rdev, dev, true);
+--- a/net/wireless/core.h
++++ b/net/wireless/core.h
+@@ -84,6 +84,10 @@ struct cfg80211_registered_device {
+
+ struct delayed_work dfs_update_channels_wk;
+
++ struct wireless_dev *offchan_radar_wdev;
++ struct cfg80211_chan_def offchan_radar_chandef;
++ struct delayed_work offchan_cac_work;
++
+ /* netlink port which started critical protocol (0 means not started) */
+ u32 crit_proto_nlportid;
+
+@@ -491,6 +495,15 @@ cfg80211_chandef_dfs_cac_time(struct wip
+
+ void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
+
++int
++cfg80211_start_offchan_radar_detection(struct cfg80211_registered_device *rdev,
++ struct wireless_dev *wdev,
++ struct cfg80211_chan_def *chandef);
++
++void cfg80211_stop_offchan_radar_detection(struct wireless_dev *wdev);
++
++void cfg80211_offchan_cac_work(struct work_struct *work);
++
+ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
+ struct ieee80211_channel *chan);
+
+--- a/net/wireless/mlme.c
++++ b/net/wireless/mlme.c
+@@ -970,3 +970,116 @@ void cfg80211_cac_event(struct net_devic
+ nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
+ }
+ EXPORT_SYMBOL(cfg80211_cac_event);
++
++void cfg80211_offchan_cac_work(struct work_struct *work)
++{
++ struct delayed_work *delayed_work = to_delayed_work(work);
++ struct cfg80211_registered_device *rdev;
++
++ rdev = container_of(delayed_work, struct cfg80211_registered_device,
++ offchan_cac_work);
++ cfg80211_offchan_cac_event(&rdev->wiphy, &rdev->offchan_radar_chandef,
++ NL80211_RADAR_CAC_FINISHED);
++}
++
++static void
++__cfg80211_offchan_cac_event(struct cfg80211_registered_device *rdev,
++ struct wireless_dev *wdev,
++ const struct cfg80211_chan_def *chandef,
++ enum nl80211_radar_event event)
++{
++ struct wiphy *wiphy = &rdev->wiphy;
++ struct net_device *netdev;
++
++ lockdep_assert_wiphy(&rdev->wiphy);
++
++ if (event != NL80211_RADAR_CAC_STARTED && !rdev->offchan_radar_wdev)
++ return;
++
++ switch (event) {
++ case NL80211_RADAR_CAC_FINISHED:
++ cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
++ memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef));
++ queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
++ cfg80211_sched_dfs_chan_update(rdev);
++ wdev = rdev->offchan_radar_wdev;
++ rdev->offchan_radar_wdev = NULL;
++ break;
++ case NL80211_RADAR_CAC_ABORTED:
++ cancel_delayed_work(&rdev->offchan_cac_work);
++ wdev = rdev->offchan_radar_wdev;
++ rdev->offchan_radar_wdev = NULL;
++ break;
++ case NL80211_RADAR_CAC_STARTED:
++ WARN_ON(!wdev);
++ rdev->offchan_radar_wdev = wdev;
++ break;
++ default:
++ return;
++ }
++
++ netdev = wdev ? wdev->netdev : NULL;
++ nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL);
++}
++
++void cfg80211_offchan_cac_event(struct wiphy *wiphy,
++ const struct cfg80211_chan_def *chandef,
++ enum nl80211_radar_event event)
++{
++ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
++
++ wiphy_lock(wiphy);
++ __cfg80211_offchan_cac_event(rdev, NULL, chandef, event);
++ wiphy_unlock(wiphy);
++}
++EXPORT_SYMBOL(cfg80211_offchan_cac_event);
++
++int
++cfg80211_start_offchan_radar_detection(struct cfg80211_registered_device *rdev,
++ struct wireless_dev *wdev,
++ struct cfg80211_chan_def *chandef)
++{
++ unsigned int cac_time_ms;
++ int err;
++
++ lockdep_assert_wiphy(&rdev->wiphy);
++
++ if (!wiphy_ext_feature_isset(&rdev->wiphy,
++ NL80211_EXT_FEATURE_RADAR_OFFCHAN))
++ return -EOPNOTSUPP;
++
++ if (rdev->offchan_radar_wdev)
++ return -EBUSY;
++
++ err = rdev_set_radar_offchan(rdev, chandef);
++ if (err)
++ return err;
++
++ cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef);
++ if (!cac_time_ms)
++ cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
++
++ rdev->offchan_radar_chandef = *chandef;
++ __cfg80211_offchan_cac_event(rdev, wdev, chandef,
++ NL80211_RADAR_CAC_STARTED);
++ queue_delayed_work(cfg80211_wq, &rdev->offchan_cac_work,
++ msecs_to_jiffies(cac_time_ms));
++
++ return 0;
++}
++
++void cfg80211_stop_offchan_radar_detection(struct wireless_dev *wdev)
++{
++ struct wiphy *wiphy = wdev->wiphy;
++ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
++
++ lockdep_assert_wiphy(wiphy);
++
++ if (wdev != rdev->offchan_radar_wdev)
++ return;
++
++ rdev_set_radar_offchan(rdev, NULL);
++
++ __cfg80211_offchan_cac_event(rdev, NULL, NULL,
++ NL80211_RADAR_CAC_ABORTED);
++}
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -793,6 +793,7 @@ static const struct nla_policy nl80211_p
+ [NL80211_ATTR_MBSSID_CONFIG] =
+ NLA_POLICY_NESTED(nl80211_mbssid_config_policy),
+ [NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED },
++ [NL80211_ATTR_RADAR_OFFCHAN] = { .type = NLA_FLAG },
+ };
+
+ /* policy for the key attributes */
+@@ -9269,12 +9270,6 @@ static int nl80211_start_radar_detection
+ if (err)
+ return err;
+
+- if (netif_carrier_ok(dev))
+- return -EBUSY;
+-
+- if (wdev->cac_started)
+- return -EBUSY;
+-
+ err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
+ if (err < 0)
+ return err;
+@@ -9285,6 +9280,16 @@ static int nl80211_start_radar_detection
+ if (!cfg80211_chandef_dfs_usable(wiphy, &chandef))
+ return -EINVAL;
+
++ if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN]))
++ return cfg80211_start_offchan_radar_detection(rdev, wdev,
++ &chandef);
++
++ if (netif_carrier_ok(dev))
++ return -EBUSY;
++
++ if (wdev->cac_started)
++ return -EBUSY;
++
+ /* CAC start is offloaded to HW and can't be started manually */
+ if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD))
+ return -EOPNOTSUPP;
+--- a/net/wireless/rdev-ops.h
++++ b/net/wireless/rdev-ops.h
+@@ -1381,4 +1381,21 @@ static inline int rdev_color_change(stru
+ return ret;
+ }
+
++static inline int
++rdev_set_radar_offchan(struct cfg80211_registered_device *rdev,
++ struct cfg80211_chan_def *chandef)
++{
++ struct wiphy *wiphy = &rdev->wiphy;
++ int ret;
++
++ if (!rdev->ops->set_radar_offchan)
++ return -EOPNOTSUPP;
++
++ trace_rdev_set_radar_offchan(wiphy, chandef);
++ ret = rdev->ops->set_radar_offchan(wiphy, chandef);
++ trace_rdev_return_int(wiphy, ret);
++
++ return ret;
++}
++
+ #endif /* __CFG80211_RDEV_OPS */
+--- a/net/wireless/trace.h
++++ b/net/wireless/trace.h
+@@ -3643,6 +3643,25 @@ TRACE_EVENT(cfg80211_bss_color_notify,
+ __entry->color_bitmap)
+ );
+
++TRACE_EVENT(rdev_set_radar_offchan,
++ TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef),
++
++ TP_ARGS(wiphy, chandef),
++
++ TP_STRUCT__entry(
++ WIPHY_ENTRY
++ CHAN_DEF_ENTRY
++ ),
++
++ TP_fast_assign(
++ WIPHY_ASSIGN;
++ CHAN_DEF_ASSIGN(chandef)
++ ),
++
++ TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT,
++ WIPHY_PR_ARG, CHAN_DEF_PR_ARG)
++);
++
+ #endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
+
+ #undef TRACE_INCLUDE_PATH
--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Wed, 27 Oct 2021 11:03:42 +0200
+Subject: [PATCH] cfg80211: move offchan_cac_event to a dedicated work
+
+In order to make cfg80211_offchan_cac_abort() (renamed from
+cfg80211_offchan_cac_event) callable in other contexts and
+without so much locking restrictions, make it trigger a new
+work instead of operating directly.
+
+Do some other renames while at it to clarify.
+
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Link: https://lore.kernel.org/r/6145c3d0f30400a568023f67981981d24c7c6133.1635325205.git.lorenzo@kernel.org
+[rewrite commit log]
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/include/net/cfg80211.h
++++ b/include/net/cfg80211.h
+@@ -7620,19 +7620,13 @@ void cfg80211_cac_event(struct net_devic
+ enum nl80211_radar_event event, gfp_t gfp);
+
+ /**
+- * cfg80211_offchan_cac_event - Channel Availability Check (CAC) offchan event
++ * cfg80211_offchan_cac_abort - Channel Availability Check offchan abort event
+ * @wiphy: the wiphy
+- * @chandef: chandef for the current channel
+- * @event: type of event
+ *
+- * This function is called when a Channel Availability Check (CAC) is finished,
+- * started or aborted by a offchannel dedicated chain.
+- *
+- * Note that this acquires the wiphy lock.
++ * This function is called by the driver when a Channel Availability Check
++ * (CAC) is aborted by a offchannel dedicated chain.
+ */
+-void cfg80211_offchan_cac_event(struct wiphy *wiphy,
+- const struct cfg80211_chan_def *chandef,
+- enum nl80211_radar_event event);
++void cfg80211_offchan_cac_abort(struct wiphy *wiphy);
+
+ /**
+ * cfg80211_gtk_rekey_notify - notify userspace about driver rekeying
+--- a/net/wireless/core.c
++++ b/net/wireless/core.c
+@@ -552,7 +552,9 @@ use_default_name:
+ INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
+ INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
+ INIT_WORK(&rdev->event_work, cfg80211_event_work);
+- INIT_DELAYED_WORK(&rdev->offchan_cac_work, cfg80211_offchan_cac_work);
++ INIT_WORK(&rdev->offchan_cac_abort_wk, cfg80211_offchan_cac_abort_wk);
++ INIT_DELAYED_WORK(&rdev->offchan_cac_done_wk,
++ cfg80211_offchan_cac_done_wk);
+
+ init_waitqueue_head(&rdev->dev_wait);
+
+@@ -1062,11 +1064,13 @@ void wiphy_unregister(struct wiphy *wiph
+ cancel_work_sync(&rdev->conn_work);
+ flush_work(&rdev->event_work);
+ cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
++ cancel_delayed_work_sync(&rdev->offchan_cac_done_wk);
+ flush_work(&rdev->destroy_work);
+ flush_work(&rdev->sched_scan_stop_wk);
+ flush_work(&rdev->propagate_radar_detect_wk);
+ flush_work(&rdev->propagate_cac_done_wk);
+ flush_work(&rdev->mgmt_registrations_update_wk);
++ flush_work(&rdev->offchan_cac_abort_wk);
+
+ #ifdef CONFIG_PM
+ if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
+--- a/net/wireless/core.h
++++ b/net/wireless/core.h
+@@ -86,7 +86,8 @@ struct cfg80211_registered_device {
+
+ struct wireless_dev *offchan_radar_wdev;
+ struct cfg80211_chan_def offchan_radar_chandef;
+- struct delayed_work offchan_cac_work;
++ struct delayed_work offchan_cac_done_wk;
++ struct work_struct offchan_cac_abort_wk;
+
+ /* netlink port which started critical protocol (0 means not started) */
+ u32 crit_proto_nlportid;
+@@ -502,7 +503,9 @@ cfg80211_start_offchan_radar_detection(s
+
+ void cfg80211_stop_offchan_radar_detection(struct wireless_dev *wdev);
+
+-void cfg80211_offchan_cac_work(struct work_struct *work);
++void cfg80211_offchan_cac_done_wk(struct work_struct *work);
++
++void cfg80211_offchan_cac_abort_wk(struct work_struct *work);
+
+ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
+ struct ieee80211_channel *chan);
+--- a/net/wireless/mlme.c
++++ b/net/wireless/mlme.c
+@@ -971,17 +971,6 @@ void cfg80211_cac_event(struct net_devic
+ }
+ EXPORT_SYMBOL(cfg80211_cac_event);
+
+-void cfg80211_offchan_cac_work(struct work_struct *work)
+-{
+- struct delayed_work *delayed_work = to_delayed_work(work);
+- struct cfg80211_registered_device *rdev;
+-
+- rdev = container_of(delayed_work, struct cfg80211_registered_device,
+- offchan_cac_work);
+- cfg80211_offchan_cac_event(&rdev->wiphy, &rdev->offchan_radar_chandef,
+- NL80211_RADAR_CAC_FINISHED);
+-}
+-
+ static void
+ __cfg80211_offchan_cac_event(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev,
+@@ -1006,7 +995,7 @@ __cfg80211_offchan_cac_event(struct cfg8
+ rdev->offchan_radar_wdev = NULL;
+ break;
+ case NL80211_RADAR_CAC_ABORTED:
+- cancel_delayed_work(&rdev->offchan_cac_work);
++ cancel_delayed_work(&rdev->offchan_cac_done_wk);
+ wdev = rdev->offchan_radar_wdev;
+ rdev->offchan_radar_wdev = NULL;
+ break;
+@@ -1022,17 +1011,44 @@ __cfg80211_offchan_cac_event(struct cfg8
+ nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL);
+ }
+
+-void cfg80211_offchan_cac_event(struct wiphy *wiphy,
+- const struct cfg80211_chan_def *chandef,
+- enum nl80211_radar_event event)
++static void
++cfg80211_offchan_cac_event(struct cfg80211_registered_device *rdev,
++ const struct cfg80211_chan_def *chandef,
++ enum nl80211_radar_event event)
++{
++ wiphy_lock(&rdev->wiphy);
++ __cfg80211_offchan_cac_event(rdev, NULL, chandef, event);
++ wiphy_unlock(&rdev->wiphy);
++}
++
++void cfg80211_offchan_cac_done_wk(struct work_struct *work)
++{
++ struct delayed_work *delayed_work = to_delayed_work(work);
++ struct cfg80211_registered_device *rdev;
++
++ rdev = container_of(delayed_work, struct cfg80211_registered_device,
++ offchan_cac_done_wk);
++ cfg80211_offchan_cac_event(rdev, &rdev->offchan_radar_chandef,
++ NL80211_RADAR_CAC_FINISHED);
++}
++
++void cfg80211_offchan_cac_abort_wk(struct work_struct *work)
++{
++ struct cfg80211_registered_device *rdev;
++
++ rdev = container_of(work, struct cfg80211_registered_device,
++ offchan_cac_abort_wk);
++ cfg80211_offchan_cac_event(rdev, &rdev->offchan_radar_chandef,
++ NL80211_RADAR_CAC_ABORTED);
++}
++
++void cfg80211_offchan_cac_abort(struct wiphy *wiphy)
+ {
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+- wiphy_lock(wiphy);
+- __cfg80211_offchan_cac_event(rdev, NULL, chandef, event);
+- wiphy_unlock(wiphy);
++ queue_work(cfg80211_wq, &rdev->offchan_cac_abort_wk);
+ }
+-EXPORT_SYMBOL(cfg80211_offchan_cac_event);
++EXPORT_SYMBOL(cfg80211_offchan_cac_abort);
+
+ int
+ cfg80211_start_offchan_radar_detection(struct cfg80211_registered_device *rdev,
+@@ -1062,7 +1078,7 @@ cfg80211_start_offchan_radar_detection(s
+ rdev->offchan_radar_chandef = *chandef;
+ __cfg80211_offchan_cac_event(rdev, wdev, chandef,
+ NL80211_RADAR_CAC_STARTED);
+- queue_delayed_work(cfg80211_wq, &rdev->offchan_cac_work,
++ queue_delayed_work(cfg80211_wq, &rdev->offchan_cac_done_wk,
+ msecs_to_jiffies(cac_time_ms));
+
+ return 0;
--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Wed, 3 Nov 2021 18:02:35 +0100
+Subject: [PATCH] cfg80211: fix possible NULL pointer dereference in
+ cfg80211_stop_offchan_radar_detection
+
+Fix the following NULL pointer dereference in
+cfg80211_stop_offchan_radar_detection routine that occurs when hostapd
+is stopped during the CAC on offchannel chain:
+
+Sat Jan 1 0[ 779.567851] ESR = 0x96000005
+0:12:50 2000 dae[ 779.572346] EC = 0x25: DABT (current EL), IL = 32 bits
+mon.debug hostap[ 779.578984] SET = 0, FnV = 0
+d: hostapd_inter[ 779.583445] EA = 0, S1PTW = 0
+face_deinit_free[ 779.587936] Data abort info:
+: num_bss=1 conf[ 779.592224] ISV = 0, ISS = 0x00000005
+->num_bss=1
+Sat[ 779.597403] CM = 0, WnR = 0
+ Jan 1 00:12:50[ 779.601749] user pgtable: 4k pages, 39-bit VAs, pgdp=00000000418b2000
+ 2000 daemon.deb[ 779.609601] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
+ug hostapd: host[ 779.619657] Internal error: Oops: 96000005 [#1] SMP
+[ 779.770810] CPU: 0 PID: 2202 Comm: hostapd Not tainted 5.10.75 #0
+[ 779.776892] Hardware name: MediaTek MT7622 RFB1 board (DT)
+[ 779.782370] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
+[ 779.788384] pc : cfg80211_chandef_valid+0x10/0x490 [cfg80211]
+[ 779.794128] lr : cfg80211_check_station_change+0x3190/0x3950 [cfg80211]
+[ 779.800731] sp : ffffffc01204b7e0
+[ 779.804036] x29: ffffffc01204b7e0 x28: ffffff80039bdc00
+[ 779.809340] x27: 0000000000000000 x26: ffffffc008cb3050
+[ 779.814644] x25: 0000000000000000 x24: 0000000000000002
+[ 779.819948] x23: ffffff8002630000 x22: ffffff8003e748d0
+[ 779.825252] x21: 0000000000000cc0 x20: ffffff8003da4a00
+[ 779.830556] x19: 0000000000000000 x18: ffffff8001bf7ce0
+[ 779.835860] x17: 00000000ffffffff x16: 0000000000000000
+[ 779.841164] x15: 0000000040d59200 x14: 00000000000019c0
+[ 779.846467] x13: 00000000000001c8 x12: 000636b9e9dab1c6
+[ 779.851771] x11: 0000000000000141 x10: 0000000000000820
+[ 779.857076] x9 : 0000000000000000 x8 : ffffff8003d7d038
+[ 779.862380] x7 : 0000000000000000 x6 : ffffff8003d7d038
+[ 779.867683] x5 : 0000000000000e90 x4 : 0000000000000038
+[ 779.872987] x3 : 0000000000000002 x2 : 0000000000000004
+[ 779.878291] x1 : 0000000000000000 x0 : 0000000000000000
+[ 779.883594] Call trace:
+[ 779.886039] cfg80211_chandef_valid+0x10/0x490 [cfg80211]
+[ 779.891434] cfg80211_check_station_change+0x3190/0x3950 [cfg80211]
+[ 779.897697] nl80211_radar_notify+0x138/0x19c [cfg80211]
+[ 779.903005] cfg80211_stop_offchan_radar_detection+0x7c/0x8c [cfg80211]
+[ 779.909616] __cfg80211_leave+0x2c/0x190 [cfg80211]
+[ 779.914490] cfg80211_register_netdevice+0x1c0/0x6d0 [cfg80211]
+[ 779.920404] raw_notifier_call_chain+0x50/0x70
+[ 779.924841] call_netdevice_notifiers_info+0x54/0xa0
+[ 779.929796] __dev_close_many+0x40/0x100
+[ 779.933712] __dev_change_flags+0x98/0x190
+[ 779.937800] dev_change_flags+0x20/0x60
+[ 779.941628] devinet_ioctl+0x534/0x6d0
+[ 779.945370] inet_ioctl+0x1bc/0x230
+[ 779.948849] sock_do_ioctl+0x44/0x200
+[ 779.952502] sock_ioctl+0x268/0x4c0
+[ 779.955985] __arm64_sys_ioctl+0xac/0xd0
+[ 779.959900] el0_svc_common.constprop.0+0x60/0x110
+[ 779.964682] do_el0_svc+0x1c/0x24
+[ 779.967990] el0_svc+0x10/0x1c
+[ 779.971036] el0_sync_handler+0x9c/0x120
+[ 779.974950] el0_sync+0x148/0x180
+[ 779.978259] Code: a9bc7bfd 910003fd a90153f3 aa0003f3 (f9400000)
+[ 779.984344] ---[ end trace 0e67b4f5d6cdeec7 ]---
+[ 779.996400] Kernel panic - not syncing: Oops: Fatal exception
+[ 780.002139] SMP: stopping secondary CPUs
+[ 780.006057] Kernel Offset: disabled
+[ 780.009537] CPU features: 0x0000002,04002004
+[ 780.013796] Memory Limit: none
+
+Fixes: b8f5facf286b ("cfg80211: implement APIs for dedicated radar detection HW")
+Reported-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
+Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Link: https://lore.kernel.org/r/c2e34c065bf8839c5ffa45498ae154021a72a520.1635958796.git.lorenzo@kernel.org
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/net/wireless/mlme.c
++++ b/net/wireless/mlme.c
+@@ -982,6 +982,9 @@ __cfg80211_offchan_cac_event(struct cfg8
+
+ lockdep_assert_wiphy(&rdev->wiphy);
+
++ if (!cfg80211_chandef_valid(chandef))
++ return;
++
+ if (event != NL80211_RADAR_CAC_STARTED && !rdev->offchan_radar_wdev)
+ return;
+
+@@ -1096,6 +1099,6 @@ void cfg80211_stop_offchan_radar_detecti
+
+ rdev_set_radar_offchan(rdev, NULL);
+
+- __cfg80211_offchan_cac_event(rdev, NULL, NULL,
++ __cfg80211_offchan_cac_event(rdev, wdev, &rdev->offchan_radar_chandef,
+ NL80211_RADAR_CAC_ABORTED);
+ }
--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Tue, 16 Nov 2021 12:41:52 +0100
+Subject: [PATCH] cfg80211: schedule offchan_cac_abort_wk in
+ cfg80211_radar_event
+
+If necessary schedule offchan_cac_abort_wk work in cfg80211_radar_event
+routine adding offchan parameter to cfg80211_radar_event signature.
+Rename cfg80211_radar_event in __cfg80211_radar_event and introduce
+the two following inline helpers:
+- cfg80211_radar_event
+- cfg80211_offchan_radar_event
+Doing so the drv will not need to run cfg80211_offchan_cac_abort() after
+radar detection on the offchannel chain.
+
+Tested-by: Owen Peng <owen.peng@mediatek.com>
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Link: https://lore.kernel.org/r/3ff583e021e3343a3ced54a7b09b5e184d1880dc.1637062727.git.lorenzo@kernel.org
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/include/net/cfg80211.h
++++ b/include/net/cfg80211.h
+@@ -7580,15 +7580,33 @@ void cfg80211_cqm_txe_notify(struct net_
+ void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp);
+
+ /**
+- * cfg80211_radar_event - radar detection event
++ * __cfg80211_radar_event - radar detection event
+ * @wiphy: the wiphy
+ * @chandef: chandef for the current channel
++ * @offchan: the radar has been detected on the offchannel chain
+ * @gfp: context flags
+ *
+ * This function is called when a radar is detected on the current chanenl.
+ */
+-void cfg80211_radar_event(struct wiphy *wiphy,
+- struct cfg80211_chan_def *chandef, gfp_t gfp);
++void __cfg80211_radar_event(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef,
++ bool offchan, gfp_t gfp);
++
++static inline void
++cfg80211_radar_event(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef,
++ gfp_t gfp)
++{
++ __cfg80211_radar_event(wiphy, chandef, false, gfp);
++}
++
++static inline void
++cfg80211_offchan_radar_event(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef,
++ gfp_t gfp)
++{
++ __cfg80211_radar_event(wiphy, chandef, true, gfp);
++}
+
+ /**
+ * cfg80211_sta_opmode_change_notify - STA's ht/vht operation mode change event
+--- a/net/wireless/mlme.c
++++ b/net/wireless/mlme.c
+@@ -905,13 +905,13 @@ void cfg80211_dfs_channels_update_work(s
+ }
+
+
+-void cfg80211_radar_event(struct wiphy *wiphy,
+- struct cfg80211_chan_def *chandef,
+- gfp_t gfp)
++void __cfg80211_radar_event(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef,
++ bool offchan, gfp_t gfp)
+ {
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+- trace_cfg80211_radar_event(wiphy, chandef);
++ trace_cfg80211_radar_event(wiphy, chandef, offchan);
+
+ /* only set the chandef supplied channel to unavailable, in
+ * case the radar is detected on only one of multiple channels
+@@ -919,6 +919,9 @@ void cfg80211_radar_event(struct wiphy *
+ */
+ cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
+
++ if (offchan)
++ queue_work(cfg80211_wq, &rdev->offchan_cac_abort_wk);
++
+ cfg80211_sched_dfs_chan_update(rdev);
+
+ nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
+@@ -926,7 +929,7 @@ void cfg80211_radar_event(struct wiphy *
+ memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def));
+ queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);
+ }
+-EXPORT_SYMBOL(cfg80211_radar_event);
++EXPORT_SYMBOL(__cfg80211_radar_event);
+
+ void cfg80211_cac_event(struct net_device *netdev,
+ const struct cfg80211_chan_def *chandef,
+@@ -998,7 +1001,8 @@ __cfg80211_offchan_cac_event(struct cfg8
+ rdev->offchan_radar_wdev = NULL;
+ break;
+ case NL80211_RADAR_CAC_ABORTED:
+- cancel_delayed_work(&rdev->offchan_cac_done_wk);
++ if (!cancel_delayed_work(&rdev->offchan_cac_done_wk))
++ return;
+ wdev = rdev->offchan_radar_wdev;
+ rdev->offchan_radar_wdev = NULL;
+ break;
+--- a/net/wireless/trace.h
++++ b/net/wireless/trace.h
+@@ -3022,18 +3022,21 @@ TRACE_EVENT(cfg80211_ch_switch_started_n
+ );
+
+ TRACE_EVENT(cfg80211_radar_event,
+- TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef),
+- TP_ARGS(wiphy, chandef),
++ TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef,
++ bool offchan),
++ TP_ARGS(wiphy, chandef, offchan),
+ TP_STRUCT__entry(
+ WIPHY_ENTRY
+ CHAN_DEF_ENTRY
++ __field(bool, offchan)
+ ),
+ TP_fast_assign(
+ WIPHY_ASSIGN;
+ CHAN_DEF_ASSIGN(chandef);
++ __entry->offchan = offchan;
+ ),
+- TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT,
+- WIPHY_PR_ARG, CHAN_DEF_PR_ARG)
++ TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT ", offchan %d",
++ WIPHY_PR_ARG, CHAN_DEF_PR_ARG, __entry->offchan)
+ );
+
+ TRACE_EVENT(cfg80211_cac_event,
--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Tue, 16 Nov 2021 15:03:36 +0100
+Subject: [PATCH] cfg80211: allow continuous radar monitoring on offchannel
+ chain
+
+Allow continuous radar detection on the offchannel chain in order
+to switch to the monitored channel whenever the underlying driver
+reports a radar pattern on the main channel.
+
+Tested-by: Owen Peng <owen.peng@mediatek.com>
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Link: https://lore.kernel.org/r/d46217310a49b14ff0e9c002f0a6e0547d70fd2c.1637071350.git.lorenzo@kernel.org
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/net/wireless/chan.c
++++ b/net/wireless/chan.c
+@@ -712,6 +712,19 @@ static bool cfg80211_is_wiphy_oper_chan(
+ return false;
+ }
+
++static bool
++cfg80211_offchan_chain_is_active(struct cfg80211_registered_device *rdev,
++ struct ieee80211_channel *channel)
++{
++ if (!rdev->offchan_radar_wdev)
++ return false;
++
++ if (!cfg80211_chandef_valid(&rdev->offchan_radar_chandef))
++ return false;
++
++ return cfg80211_is_sub_chan(&rdev->offchan_radar_chandef, channel);
++}
++
+ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
+ struct ieee80211_channel *chan)
+ {
+@@ -728,6 +741,9 @@ bool cfg80211_any_wiphy_oper_chan(struct
+
+ if (cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan))
+ return true;
++
++ if (cfg80211_offchan_chain_is_active(rdev, chan))
++ return true;
+ }
+
+ return false;
+--- a/net/wireless/mlme.c
++++ b/net/wireless/mlme.c
+@@ -988,7 +988,7 @@ __cfg80211_offchan_cac_event(struct cfg8
+ if (!cfg80211_chandef_valid(chandef))
+ return;
+
+- if (event != NL80211_RADAR_CAC_STARTED && !rdev->offchan_radar_wdev)
++ if (!rdev->offchan_radar_wdev)
+ return;
+
+ switch (event) {
+@@ -998,17 +998,13 @@ __cfg80211_offchan_cac_event(struct cfg8
+ queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
+ cfg80211_sched_dfs_chan_update(rdev);
+ wdev = rdev->offchan_radar_wdev;
+- rdev->offchan_radar_wdev = NULL;
+ break;
+ case NL80211_RADAR_CAC_ABORTED:
+ if (!cancel_delayed_work(&rdev->offchan_cac_done_wk))
+ return;
+ wdev = rdev->offchan_radar_wdev;
+- rdev->offchan_radar_wdev = NULL;
+ break;
+ case NL80211_RADAR_CAC_STARTED:
+- WARN_ON(!wdev);
+- rdev->offchan_radar_wdev = wdev;
+ break;
+ default:
+ return;
+@@ -1024,7 +1020,8 @@ cfg80211_offchan_cac_event(struct cfg802
+ enum nl80211_radar_event event)
+ {
+ wiphy_lock(&rdev->wiphy);
+- __cfg80211_offchan_cac_event(rdev, NULL, chandef, event);
++ __cfg80211_offchan_cac_event(rdev, rdev->offchan_radar_wdev,
++ chandef, event);
+ wiphy_unlock(&rdev->wiphy);
+ }
+
+@@ -1071,7 +1068,13 @@ cfg80211_start_offchan_radar_detection(s
+ NL80211_EXT_FEATURE_RADAR_OFFCHAN))
+ return -EOPNOTSUPP;
+
+- if (rdev->offchan_radar_wdev)
++ /* Offchannel chain already locked by another wdev */
++ if (rdev->offchan_radar_wdev && rdev->offchan_radar_wdev != wdev)
++ return -EBUSY;
++
++ /* CAC already in progress on the offchannel chain */
++ if (rdev->offchan_radar_wdev == wdev &&
++ delayed_work_pending(&rdev->offchan_cac_done_wk))
+ return -EBUSY;
+
+ err = rdev_set_radar_offchan(rdev, chandef);
+@@ -1083,6 +1086,8 @@ cfg80211_start_offchan_radar_detection(s
+ cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
+
+ rdev->offchan_radar_chandef = *chandef;
++ rdev->offchan_radar_wdev = wdev; /* Get offchain ownership */
++
+ __cfg80211_offchan_cac_event(rdev, wdev, chandef,
+ NL80211_RADAR_CAC_STARTED);
+ queue_delayed_work(cfg80211_wq, &rdev->offchan_cac_done_wk,
+@@ -1102,6 +1107,7 @@ void cfg80211_stop_offchan_radar_detecti
+ return;
+
+ rdev_set_radar_offchan(rdev, NULL);
++ rdev->offchan_radar_wdev = NULL; /* Release offchain ownership */
+
+ __cfg80211_offchan_cac_event(rdev, wdev, &rdev->offchan_radar_chandef,
+ NL80211_RADAR_CAC_ABORTED);
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -9260,42 +9260,60 @@ static int nl80211_start_radar_detection
+ struct cfg80211_chan_def chandef;
+ enum nl80211_dfs_regions dfs_region;
+ unsigned int cac_time_ms;
+- int err;
++ int err = -EINVAL;
++
++ flush_delayed_work(&rdev->dfs_update_channels_wk);
++
++ wiphy_lock(wiphy);
+
+ dfs_region = reg_get_dfs_region(wiphy);
+ if (dfs_region == NL80211_DFS_UNSET)
+- return -EINVAL;
++ goto unlock;
+
+ err = nl80211_parse_chandef(rdev, info, &chandef);
+ if (err)
+- return err;
++ goto unlock;
+
+ err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
+ if (err < 0)
+- return err;
++ goto unlock;
+
+- if (err == 0)
+- return -EINVAL;
++ if (err == 0) {
++ err = -EINVAL;
++ goto unlock;
++ }
+
+- if (!cfg80211_chandef_dfs_usable(wiphy, &chandef))
+- return -EINVAL;
++ if (!cfg80211_chandef_dfs_usable(wiphy, &chandef)) {
++ err = -EINVAL;
++ goto unlock;
++ }
+
+- if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN]))
+- return cfg80211_start_offchan_radar_detection(rdev, wdev,
+- &chandef);
++ if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN])) {
++ err = cfg80211_start_offchan_radar_detection(rdev, wdev,
++ &chandef);
++ goto unlock;
++ }
+
+- if (netif_carrier_ok(dev))
+- return -EBUSY;
++ if (netif_carrier_ok(dev)) {
++ err = -EBUSY;
++ goto unlock;
++ }
+
+- if (wdev->cac_started)
+- return -EBUSY;
++ if (wdev->cac_started) {
++ err = -EBUSY;
++ goto unlock;
++ }
+
+ /* CAC start is offloaded to HW and can't be started manually */
+- if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD))
+- return -EOPNOTSUPP;
++ if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD)) {
++ err = -EOPNOTSUPP;
++ goto unlock;
++ }
+
+- if (!rdev->ops->start_radar_detection)
+- return -EOPNOTSUPP;
++ if (!rdev->ops->start_radar_detection) {
++ err = -EOPNOTSUPP;
++ goto unlock;
++ }
+
+ cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
+ if (WARN_ON(!cac_time_ms))
+@@ -9308,6 +9326,9 @@ static int nl80211_start_radar_detection
+ wdev->cac_start_time = jiffies;
+ wdev->cac_time_ms = cac_time_ms;
+ }
++unlock:
++ wiphy_unlock(wiphy);
++
+ return err;
+ }
+
+@@ -15926,7 +15947,8 @@ static const struct genl_small_ops nl802
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = nl80211_start_radar_detection,
+ .flags = GENL_UNS_ADMIN_PERM,
+- .internal_flags = NL80211_FLAG_NEED_NETDEV_UP,
++ .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
++ NL80211_FLAG_NO_WIPHY_MTX,
+ },
+ {
+ .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
--- /dev/null
+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);
+ int (*net_fill_forward_path)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+--- a/net/mac80211/cfg.c
++++ b/net/mac80211/cfg.c
+@@ -4344,6 +4344,18 @@ 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,
+@@ -4448,4 +4460,5 @@ 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,
+ };
--- /dev/null
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Mon, 29 Nov 2021 14:11:24 +0100
+Subject: [PATCH] cfg80211: rename offchannel_chain structs to background_chain
+ to avoid confusion with ETSI standard
+
+ETSI standard defines "Offchannel CAC" as:
+"Off-Channel CAC is performed by a number of non-continuous checks
+spread over a period in time. This period, which is required to
+determine the presence of radar signals, is defined as the Off-Channel
+CAC Time..
+Minimum Off-Channel CAC Time 6 minutes and Maximum Off-Channel CAC Time
+4 hours..".
+mac80211 implementation refers to a dedicated hw chain used for continuous
+radar monitoring. Rename offchannel_* references to background_* in
+order to avoid confusion with ETSI standard.
+
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Link: https://lore.kernel.org/r/4204cc1d648d76b44557981713231e030a3bd991.1638190762.git.lorenzo@kernel.org
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/include/net/cfg80211.h
++++ b/include/net/cfg80211.h
+@@ -4058,14 +4058,14 @@ struct mgmt_frame_regs {
+ *
+ * @color_change: Initiate a color change.
+ *
+- * @set_radar_offchan: Configure dedicated offchannel chain available for
++ * @set_radar_background: 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
++ * Background 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.
++ * disable background CAC/radar detection.
+ */
+ struct cfg80211_ops {
+ int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
+@@ -4396,8 +4396,8 @@ struct cfg80211_ops {
+ int (*color_change)(struct wiphy *wiphy,
+ struct net_device *dev,
+ struct cfg80211_color_change_settings *params);
+- int (*set_radar_offchan)(struct wiphy *wiphy,
+- struct cfg80211_chan_def *chandef);
++ int (*set_radar_background)(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef);
+ };
+
+ /*
+@@ -7601,9 +7601,9 @@ cfg80211_radar_event(struct wiphy *wiphy
+ }
+
+ static inline void
+-cfg80211_offchan_radar_event(struct wiphy *wiphy,
+- struct cfg80211_chan_def *chandef,
+- gfp_t gfp)
++cfg80211_background_radar_event(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef,
++ gfp_t gfp)
+ {
+ __cfg80211_radar_event(wiphy, chandef, true, gfp);
+ }
+@@ -7638,13 +7638,13 @@ void cfg80211_cac_event(struct net_devic
+ enum nl80211_radar_event event, gfp_t gfp);
+
+ /**
+- * cfg80211_offchan_cac_abort - Channel Availability Check offchan abort event
++ * cfg80211_background_cac_abort - Channel Availability Check offchan abort event
+ * @wiphy: the wiphy
+ *
+ * This function is called by the driver when a Channel Availability Check
+ * (CAC) is aborted by a offchannel dedicated chain.
+ */
+-void cfg80211_offchan_cac_abort(struct wiphy *wiphy);
++void cfg80211_background_cac_abort(struct wiphy *wiphy);
+
+ /**
+ * cfg80211_gtk_rekey_notify - notify userspace about driver rekeying
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -3937,14 +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
++ * @set_radar_background: 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
++ * Background 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.
++ * disable background CAC/radar detection.
+ * @net_fill_forward_path: Called from .ndo_fill_forward_path in order to
+ * resolve a path for hardware flow offloading
+ */
+@@ -4275,8 +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);
++ int (*set_radar_background)(struct ieee80211_hw *hw,
++ struct cfg80211_chan_def *chandef);
+ int (*net_fill_forward_path)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+--- a/include/uapi/linux/nl80211.h
++++ b/include/uapi/linux/nl80211.h
+@@ -2608,10 +2608,10 @@ enum nl80211_commands {
+ * Mandatory parameter for the transmitting interface to enable MBSSID.
+ * Optional for the non-transmitting interfaces.
+ *
+- * @NL80211_ATTR_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
++ * @NL80211_ATTR_RADAR_BACKGROUND: 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.
++ * Background radar/CAC detection allows to avoid the CAC downtime
+ * switching on a different channel during CAC detection on the selected
+ * radar channel.
+ *
+@@ -3121,7 +3121,7 @@ enum nl80211_attrs {
+ NL80211_ATTR_MBSSID_CONFIG,
+ NL80211_ATTR_MBSSID_ELEMS,
+
+- NL80211_ATTR_RADAR_OFFCHAN,
++ NL80211_ATTR_RADAR_BACKGROUND,
+
+ /* add attributes here, update the policy in nl80211.c */
+
+@@ -6022,7 +6022,7 @@ enum nl80211_feature_flags {
+ * @NL80211_EXT_FEATURE_BSS_COLOR: The driver supports BSS color collision
+ * detection and change announcemnts.
+ *
+- * @NL80211_EXT_FEATURE_RADAR_OFFCHAN: Device supports offchannel radar/CAC
++ * @NL80211_EXT_FEATURE_RADAR_BACKGROUND: Device supports background radar/CAC
+ * detection.
+ *
+ * @NUM_NL80211_EXT_FEATURES: number of extended features.
+@@ -6090,7 +6090,7 @@ enum nl80211_ext_feature_index {
+ NL80211_EXT_FEATURE_SECURE_RTT,
+ NL80211_EXT_FEATURE_PROT_RANGE_NEGO_AND_MEASURE,
+ NL80211_EXT_FEATURE_BSS_COLOR,
+- NL80211_EXT_FEATURE_RADAR_OFFCHAN,
++ NL80211_EXT_FEATURE_RADAR_BACKGROUND,
+
+ /* add new features before the definition below */
+ NUM_NL80211_EXT_FEATURES,
+--- a/net/mac80211/cfg.c
++++ b/net/mac80211/cfg.c
+@@ -4345,15 +4345,15 @@ out:
+ }
+
+ static int
+-ieee80211_set_radar_offchan(struct wiphy *wiphy,
+- struct cfg80211_chan_def *chandef)
++ieee80211_set_radar_background(struct wiphy *wiphy,
++ struct cfg80211_chan_def *chandef)
+ {
+ struct ieee80211_local *local = wiphy_priv(wiphy);
+
+- if (!local->ops->set_radar_offchan)
++ if (!local->ops->set_radar_background)
+ return -EOPNOTSUPP;
+
+- return local->ops->set_radar_offchan(&local->hw, chandef);
++ return local->ops->set_radar_background(&local->hw, chandef);
+ }
+
+ const struct cfg80211_ops mac80211_config_ops = {
+@@ -4460,5 +4460,5 @@ 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,
++ .set_radar_background = ieee80211_set_radar_background,
+ };
+--- a/net/wireless/chan.c
++++ b/net/wireless/chan.c
+@@ -716,13 +716,13 @@ static bool
+ cfg80211_offchan_chain_is_active(struct cfg80211_registered_device *rdev,
+ struct ieee80211_channel *channel)
+ {
+- if (!rdev->offchan_radar_wdev)
++ if (!rdev->background_radar_wdev)
+ return false;
+
+- if (!cfg80211_chandef_valid(&rdev->offchan_radar_chandef))
++ if (!cfg80211_chandef_valid(&rdev->background_radar_chandef))
+ return false;
+
+- return cfg80211_is_sub_chan(&rdev->offchan_radar_chandef, channel);
++ return cfg80211_is_sub_chan(&rdev->background_radar_chandef, channel);
+ }
+
+ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
+--- a/net/wireless/core.c
++++ b/net/wireless/core.c
+@@ -552,9 +552,10 @@ use_default_name:
+ INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
+ INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
+ INIT_WORK(&rdev->event_work, cfg80211_event_work);
+- INIT_WORK(&rdev->offchan_cac_abort_wk, cfg80211_offchan_cac_abort_wk);
+- INIT_DELAYED_WORK(&rdev->offchan_cac_done_wk,
+- cfg80211_offchan_cac_done_wk);
++ INIT_WORK(&rdev->background_cac_abort_wk,
++ cfg80211_background_cac_abort_wk);
++ INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
++ cfg80211_background_cac_done_wk);
+
+ init_waitqueue_head(&rdev->dev_wait);
+
+@@ -1064,13 +1065,13 @@ void wiphy_unregister(struct wiphy *wiph
+ cancel_work_sync(&rdev->conn_work);
+ flush_work(&rdev->event_work);
+ cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
+- cancel_delayed_work_sync(&rdev->offchan_cac_done_wk);
++ cancel_delayed_work_sync(&rdev->background_cac_done_wk);
+ flush_work(&rdev->destroy_work);
+ flush_work(&rdev->sched_scan_stop_wk);
+ flush_work(&rdev->propagate_radar_detect_wk);
+ flush_work(&rdev->propagate_cac_done_wk);
+ flush_work(&rdev->mgmt_registrations_update_wk);
+- flush_work(&rdev->offchan_cac_abort_wk);
++ flush_work(&rdev->background_cac_abort_wk);
+
+ #ifdef CONFIG_PM
+ if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
+@@ -1219,7 +1220,7 @@ void __cfg80211_leave(struct cfg80211_re
+
+ cfg80211_pmsr_wdev_down(wdev);
+
+- cfg80211_stop_offchan_radar_detection(wdev);
++ cfg80211_stop_background_radar_detection(wdev);
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_ADHOC:
+--- a/net/wireless/core.h
++++ b/net/wireless/core.h
+@@ -84,10 +84,10 @@ struct cfg80211_registered_device {
+
+ struct delayed_work dfs_update_channels_wk;
+
+- struct wireless_dev *offchan_radar_wdev;
+- struct cfg80211_chan_def offchan_radar_chandef;
+- struct delayed_work offchan_cac_done_wk;
+- struct work_struct offchan_cac_abort_wk;
++ struct wireless_dev *background_radar_wdev;
++ struct cfg80211_chan_def background_radar_chandef;
++ struct delayed_work background_cac_done_wk;
++ struct work_struct background_cac_abort_wk;
+
+ /* netlink port which started critical protocol (0 means not started) */
+ u32 crit_proto_nlportid;
+@@ -497,15 +497,15 @@ cfg80211_chandef_dfs_cac_time(struct wip
+ void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
+
+ int
+-cfg80211_start_offchan_radar_detection(struct cfg80211_registered_device *rdev,
+- struct wireless_dev *wdev,
+- struct cfg80211_chan_def *chandef);
++cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev,
++ struct wireless_dev *wdev,
++ struct cfg80211_chan_def *chandef);
+
+-void cfg80211_stop_offchan_radar_detection(struct wireless_dev *wdev);
++void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev);
+
+-void cfg80211_offchan_cac_done_wk(struct work_struct *work);
++void cfg80211_background_cac_done_wk(struct work_struct *work);
+
+-void cfg80211_offchan_cac_abort_wk(struct work_struct *work);
++void cfg80211_background_cac_abort_wk(struct work_struct *work);
+
+ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
+ struct ieee80211_channel *chan);
+--- a/net/wireless/mlme.c
++++ b/net/wireless/mlme.c
+@@ -920,7 +920,7 @@ void __cfg80211_radar_event(struct wiphy
+ cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
+
+ if (offchan)
+- queue_work(cfg80211_wq, &rdev->offchan_cac_abort_wk);
++ queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
+
+ cfg80211_sched_dfs_chan_update(rdev);
+
+@@ -975,10 +975,10 @@ void cfg80211_cac_event(struct net_devic
+ EXPORT_SYMBOL(cfg80211_cac_event);
+
+ static void
+-__cfg80211_offchan_cac_event(struct cfg80211_registered_device *rdev,
+- struct wireless_dev *wdev,
+- const struct cfg80211_chan_def *chandef,
+- enum nl80211_radar_event event)
++__cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
++ struct wireless_dev *wdev,
++ const struct cfg80211_chan_def *chandef,
++ enum nl80211_radar_event event)
+ {
+ struct wiphy *wiphy = &rdev->wiphy;
+ struct net_device *netdev;
+@@ -988,7 +988,7 @@ __cfg80211_offchan_cac_event(struct cfg8
+ if (!cfg80211_chandef_valid(chandef))
+ return;
+
+- if (!rdev->offchan_radar_wdev)
++ if (!rdev->background_radar_wdev)
+ return;
+
+ switch (event) {
+@@ -997,12 +997,12 @@ __cfg80211_offchan_cac_event(struct cfg8
+ memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef));
+ queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
+ cfg80211_sched_dfs_chan_update(rdev);
+- wdev = rdev->offchan_radar_wdev;
++ wdev = rdev->background_radar_wdev;
+ break;
+ case NL80211_RADAR_CAC_ABORTED:
+- if (!cancel_delayed_work(&rdev->offchan_cac_done_wk))
++ if (!cancel_delayed_work(&rdev->background_cac_done_wk))
+ return;
+- wdev = rdev->offchan_radar_wdev;
++ wdev = rdev->background_radar_wdev;
+ break;
+ case NL80211_RADAR_CAC_STARTED:
+ break;
+@@ -1015,49 +1015,49 @@ __cfg80211_offchan_cac_event(struct cfg8
+ }
+
+ static void
+-cfg80211_offchan_cac_event(struct cfg80211_registered_device *rdev,
+- const struct cfg80211_chan_def *chandef,
+- enum nl80211_radar_event event)
++cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
++ const struct cfg80211_chan_def *chandef,
++ enum nl80211_radar_event event)
+ {
+ wiphy_lock(&rdev->wiphy);
+- __cfg80211_offchan_cac_event(rdev, rdev->offchan_radar_wdev,
+- chandef, event);
++ __cfg80211_background_cac_event(rdev, rdev->background_radar_wdev,
++ chandef, event);
+ wiphy_unlock(&rdev->wiphy);
+ }
+
+-void cfg80211_offchan_cac_done_wk(struct work_struct *work)
++void cfg80211_background_cac_done_wk(struct work_struct *work)
+ {
+ struct delayed_work *delayed_work = to_delayed_work(work);
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(delayed_work, struct cfg80211_registered_device,
+- offchan_cac_done_wk);
+- cfg80211_offchan_cac_event(rdev, &rdev->offchan_radar_chandef,
+- NL80211_RADAR_CAC_FINISHED);
++ background_cac_done_wk);
++ cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
++ NL80211_RADAR_CAC_FINISHED);
+ }
+
+-void cfg80211_offchan_cac_abort_wk(struct work_struct *work)
++void cfg80211_background_cac_abort_wk(struct work_struct *work)
+ {
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+- offchan_cac_abort_wk);
+- cfg80211_offchan_cac_event(rdev, &rdev->offchan_radar_chandef,
+- NL80211_RADAR_CAC_ABORTED);
++ background_cac_abort_wk);
++ cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
++ NL80211_RADAR_CAC_ABORTED);
+ }
+
+-void cfg80211_offchan_cac_abort(struct wiphy *wiphy)
++void cfg80211_background_cac_abort(struct wiphy *wiphy)
+ {
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+- queue_work(cfg80211_wq, &rdev->offchan_cac_abort_wk);
++ queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
+ }
+-EXPORT_SYMBOL(cfg80211_offchan_cac_abort);
++EXPORT_SYMBOL(cfg80211_background_cac_abort);
+
+ int
+-cfg80211_start_offchan_radar_detection(struct cfg80211_registered_device *rdev,
+- struct wireless_dev *wdev,
+- struct cfg80211_chan_def *chandef)
++cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev,
++ struct wireless_dev *wdev,
++ struct cfg80211_chan_def *chandef)
+ {
+ unsigned int cac_time_ms;
+ int err;
+@@ -1065,19 +1065,19 @@ cfg80211_start_offchan_radar_detection(s
+ lockdep_assert_wiphy(&rdev->wiphy);
+
+ if (!wiphy_ext_feature_isset(&rdev->wiphy,
+- NL80211_EXT_FEATURE_RADAR_OFFCHAN))
++ NL80211_EXT_FEATURE_RADAR_BACKGROUND))
+ return -EOPNOTSUPP;
+
+ /* Offchannel chain already locked by another wdev */
+- if (rdev->offchan_radar_wdev && rdev->offchan_radar_wdev != wdev)
++ if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev)
+ return -EBUSY;
+
+ /* CAC already in progress on the offchannel chain */
+- if (rdev->offchan_radar_wdev == wdev &&
+- delayed_work_pending(&rdev->offchan_cac_done_wk))
++ if (rdev->background_radar_wdev == wdev &&
++ delayed_work_pending(&rdev->background_cac_done_wk))
+ return -EBUSY;
+
+- err = rdev_set_radar_offchan(rdev, chandef);
++ err = rdev_set_radar_background(rdev, chandef);
+ if (err)
+ return err;
+
+@@ -1085,30 +1085,31 @@ cfg80211_start_offchan_radar_detection(s
+ if (!cac_time_ms)
+ cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
+
+- rdev->offchan_radar_chandef = *chandef;
+- rdev->offchan_radar_wdev = wdev; /* Get offchain ownership */
++ rdev->background_radar_chandef = *chandef;
++ rdev->background_radar_wdev = wdev; /* Get offchain ownership */
+
+- __cfg80211_offchan_cac_event(rdev, wdev, chandef,
+- NL80211_RADAR_CAC_STARTED);
+- queue_delayed_work(cfg80211_wq, &rdev->offchan_cac_done_wk,
++ __cfg80211_background_cac_event(rdev, wdev, chandef,
++ NL80211_RADAR_CAC_STARTED);
++ queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk,
+ msecs_to_jiffies(cac_time_ms));
+
+ return 0;
+ }
+
+-void cfg80211_stop_offchan_radar_detection(struct wireless_dev *wdev)
++void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev)
+ {
+ struct wiphy *wiphy = wdev->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ lockdep_assert_wiphy(wiphy);
+
+- if (wdev != rdev->offchan_radar_wdev)
++ if (wdev != rdev->background_radar_wdev)
+ return;
+
+- rdev_set_radar_offchan(rdev, NULL);
+- rdev->offchan_radar_wdev = NULL; /* Release offchain ownership */
++ rdev_set_radar_background(rdev, NULL);
++ rdev->background_radar_wdev = NULL; /* Release offchain ownership */
+
+- __cfg80211_offchan_cac_event(rdev, wdev, &rdev->offchan_radar_chandef,
+- NL80211_RADAR_CAC_ABORTED);
++ __cfg80211_background_cac_event(rdev, wdev,
++ &rdev->background_radar_chandef,
++ NL80211_RADAR_CAC_ABORTED);
+ }
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -793,7 +793,7 @@ static const struct nla_policy nl80211_p
+ [NL80211_ATTR_MBSSID_CONFIG] =
+ NLA_POLICY_NESTED(nl80211_mbssid_config_policy),
+ [NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED },
+- [NL80211_ATTR_RADAR_OFFCHAN] = { .type = NLA_FLAG },
++ [NL80211_ATTR_RADAR_BACKGROUND] = { .type = NLA_FLAG },
+ };
+
+ /* policy for the key attributes */
+@@ -9288,9 +9288,9 @@ static int nl80211_start_radar_detection
+ goto unlock;
+ }
+
+- if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN])) {
+- err = cfg80211_start_offchan_radar_detection(rdev, wdev,
+- &chandef);
++ if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_BACKGROUND])) {
++ err = cfg80211_start_background_radar_detection(rdev, wdev,
++ &chandef);
+ goto unlock;
+ }
+
+--- a/net/wireless/rdev-ops.h
++++ b/net/wireless/rdev-ops.h
+@@ -1382,17 +1382,17 @@ static inline int rdev_color_change(stru
+ }
+
+ static inline int
+-rdev_set_radar_offchan(struct cfg80211_registered_device *rdev,
+- struct cfg80211_chan_def *chandef)
++rdev_set_radar_background(struct cfg80211_registered_device *rdev,
++ struct cfg80211_chan_def *chandef)
+ {
+ struct wiphy *wiphy = &rdev->wiphy;
+ int ret;
+
+- if (!rdev->ops->set_radar_offchan)
++ if (!rdev->ops->set_radar_background)
+ return -EOPNOTSUPP;
+
+- trace_rdev_set_radar_offchan(wiphy, chandef);
+- ret = rdev->ops->set_radar_offchan(wiphy, chandef);
++ trace_rdev_set_radar_background(wiphy, chandef);
++ ret = rdev->ops->set_radar_background(wiphy, chandef);
+ trace_rdev_return_int(wiphy, ret);
+
+ return ret;
+--- a/net/wireless/trace.h
++++ b/net/wireless/trace.h
+@@ -3646,7 +3646,7 @@ TRACE_EVENT(cfg80211_bss_color_notify,
+ __entry->color_bitmap)
+ );
+
+-TRACE_EVENT(rdev_set_radar_offchan,
++TRACE_EVENT(rdev_set_radar_background,
+ TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef),
+
+ TP_ARGS(wiphy, chandef),
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
-@@ -630,21 +630,6 @@ static int wiphy_verify_combinations(str
+@@ -634,21 +634,6 @@ static int wiphy_verify_combinations(str
c->limits[j].max > 1))
return -EINVAL;
*
* @rfkill_poll: polls the hw rfkill line, use cfg80211 reporting
* functions to adjust rfkill hw state
-@@ -4193,6 +4194,7 @@ struct cfg80211_ops {
+@@ -4202,6 +4203,7 @@ struct cfg80211_ops {
enum nl80211_tx_power_setting type, int mbm);
int (*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
int *dbm);
u8 ps_dtim_period;
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
-@@ -2608,6 +2608,9 @@ enum nl80211_commands {
- * Mandatory parameter for the transmitting interface to enable MBSSID.
- * Optional for the non-transmitting interfaces.
+@@ -2615,6 +2615,9 @@ enum nl80211_commands {
+ * switching on a different channel during CAC detection on the selected
+ * radar channel.
*
+ * @NL80211_ATTR_WIPHY_ANTENNA_GAIN: Configured antenna gain. Used to reduce
+ * transmit power to stay within regulatory limits. u32, dBi.
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
-@@ -3114,6 +3117,8 @@ enum nl80211_attrs {
- NL80211_ATTR_MBSSID_CONFIG,
- NL80211_ATTR_MBSSID_ELEMS,
+@@ -3123,6 +3126,8 @@ enum nl80211_attrs {
+
+ NL80211_ATTR_RADAR_BACKGROUND,
+ NL80211_ATTR_WIPHY_ANTENNA_GAIN,
+
static void ieee80211_rfkill_poll(struct wiphy *wiphy)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
-@@ -4399,6 +4412,7 @@ const struct cfg80211_ops mac80211_confi
+@@ -4411,6 +4424,7 @@ const struct cfg80211_ops mac80211_confi
.set_wiphy_params = ieee80211_set_wiphy_params,
.set_tx_power = ieee80211_set_tx_power,
.get_tx_power = ieee80211_get_tx_power,
local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
-@@ -793,6 +793,7 @@ static const struct nla_policy nl80211_p
- [NL80211_ATTR_MBSSID_CONFIG] =
+@@ -794,6 +794,7 @@ static const struct nla_policy nl80211_p
NLA_POLICY_NESTED(nl80211_mbssid_config_policy),
[NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED },
+ [NL80211_ATTR_RADAR_BACKGROUND] = { .type = NLA_FLAG },
+ [NL80211_ATTR_WIPHY_ANTENNA_GAIN] = { .type = NLA_U32 },
};
/* policy for the key attributes */
-@@ -3374,6 +3375,22 @@ static int nl80211_set_wiphy(struct sk_b
+@@ -3375,6 +3376,22 @@ static int nl80211_set_wiphy(struct sk_b
goto out;
}
projects / openwrt / staging / mkresin.git / commitdiff