diff mbox series

[v4,6/8] wifi: mac80211: handle DFS per link

Message ID 20240830060918.2418701-7-quic_adisi@quicinc.com (mailing list archive)
State Changes Requested
Delegated to: Johannes Berg
Headers show
Series wifi: cfg80211/mac80211: add DFS support for MLO | expand

Commit Message

Aditya Kumar Singh Aug. 30, 2024, 6:09 a.m. UTC
In order to support DFS with MLO, handle the link ID now passed from
cfg80211, adjust the code to do everything per link and call the
notifications to cfg80211 correctly.

Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
---
 net/mac80211/cfg.c  | 26 ++++++++++++++++++--------
 net/mac80211/link.c | 10 ++++++++++
 net/mac80211/util.c | 29 +++++++++++++++++++++++------
 3 files changed, 51 insertions(+), 14 deletions(-)
diff mbox series

Patch

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 57539e03d7d7..726cfb1f9061 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -3464,6 +3464,7 @@  static int ieee80211_start_radar_detection(struct wiphy *wiphy,
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_chan_req chanreq = { .oper = *chandef };
 	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_link_data *link_data;
 	int err;
 
 	lockdep_assert_wiphy(local->hw.wiphy);
@@ -3471,16 +3472,20 @@  static int ieee80211_start_radar_detection(struct wiphy *wiphy,
 	if (!list_empty(&local->roc_list) || local->scanning)
 		return -EBUSY;
 
+	link_data = sdata_dereference(sdata->link[link_id], sdata);
+	if (!link_data)
+		return -ENOLINK;
+
 	/* whatever, but channel contexts should not complain about that one */
-	sdata->deflink.smps_mode = IEEE80211_SMPS_OFF;
-	sdata->deflink.needed_rx_chains = local->rx_chains;
+	link_data->smps_mode = IEEE80211_SMPS_OFF;
+	link_data->needed_rx_chains = local->rx_chains;
 
-	err = ieee80211_link_use_channel(&sdata->deflink, &chanreq,
+	err = ieee80211_link_use_channel(link_data, &chanreq,
 					 IEEE80211_CHANCTX_SHARED);
 	if (err)
 		return err;
 
-	wiphy_delayed_work_queue(wiphy, &sdata->deflink.dfs_cac_timer_work,
+	wiphy_delayed_work_queue(wiphy, &link_data->dfs_cac_timer_work,
 				 msecs_to_jiffies(cac_time_ms));
 
 	return 0;
@@ -3491,16 +3496,21 @@  static void ieee80211_end_cac(struct wiphy *wiphy,
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_link_data *link_data;
 
 	lockdep_assert_wiphy(local->hw.wiphy);
 
 	list_for_each_entry(sdata, &local->interfaces, list) {
+		link_data = sdata_dereference(sdata->link[link_id], sdata);
+		if (!link_data)
+			continue;
+
 		wiphy_delayed_work_cancel(wiphy,
-					  &sdata->deflink.dfs_cac_timer_work);
+					  &link_data->dfs_cac_timer_work);
 
-		if (sdata->wdev.links[0].cac_started) {
-			ieee80211_link_release_channel(&sdata->deflink);
-			sdata->wdev.links[0].cac_started = false;
+		if (sdata->wdev.links[link_id].cac_started) {
+			ieee80211_link_release_channel(link_data);
+			sdata->wdev.links[link_id].cac_started = false;
 		}
 	}
 }
diff --git a/net/mac80211/link.c b/net/mac80211/link.c
index b4378969cbf1..0bbac64d5fa0 100644
--- a/net/mac80211/link.c
+++ b/net/mac80211/link.c
@@ -77,6 +77,16 @@  void ieee80211_link_stop(struct ieee80211_link_data *link)
 			  &link->color_change_finalize_work);
 	wiphy_work_cancel(link->sdata->local->hw.wiphy,
 			  &link->csa.finalize_work);
+
+	if (link->sdata->wdev.links[link->link_id].cac_started) {
+		wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy,
+					  &link->dfs_cac_timer_work);
+		cfg80211_cac_event(link->sdata->dev,
+				   &link->conf->chanreq.oper,
+				   NL80211_RADAR_CAC_ABORTED,
+				   GFP_KERNEL, link->link_id);
+	}
+
 	ieee80211_link_release_channel(link);
 }
 
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 88ea6246cc48..d29ea35d8142 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -3471,20 +3471,37 @@  void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct cfg80211_chan_def chandef;
+	struct ieee80211_link_data *link_data;
+	struct ieee80211_bss_conf *link_conf;
+	unsigned int link_id;
 
 	lockdep_assert_wiphy(local->hw.wiphy);
 
 	list_for_each_entry(sdata, &local->interfaces, list) {
-		wiphy_delayed_work_cancel(local->hw.wiphy,
-					  &sdata->deflink.dfs_cac_timer_work);
+		for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
+		     link_id++) {
+			link_data = sdata_dereference(sdata->link[link_id],
+						      sdata);
+			if (!link_data)
+				continue;
+
+			wiphy_delayed_work_cancel(local->hw.wiphy,
+						  &link_data->dfs_cac_timer_work);
+
+			if (!sdata->wdev.links[link_id].cac_started)
+				continue;
+
+			link_conf =
+				rcu_dereference(sdata->vif.link_conf[link_id]);
+			if (!link_conf)
+				continue;
 
-		if (sdata->wdev.links[0].cac_started) {
-			chandef = sdata->vif.bss_conf.chanreq.oper;
-			ieee80211_link_release_channel(&sdata->deflink);
+			chandef = link_conf->chanreq.oper;
+			ieee80211_link_release_channel(link_data);
 			cfg80211_cac_event(sdata->dev,
 					   &chandef,
 					   NL80211_RADAR_CAC_ABORTED,
-					   GFP_KERNEL, 0);
+					   GFP_KERNEL, link_id);
 		}
 	}
 }