wifi: mac80211_hwsim: implement NAN schedule callbacks

Implement mac80211 schedule callbacks for NAN Data Path support:

- Track local schedule via BSS_CHANGED_NAN_LOCAL_SCHED, caching
  the channel for each 16TU time slot.
- Copy peer schedule to driver-private storage in
  nan_peer_sched_changed callback for use in TX availability
  decisions.

Signed-off-by: Daniel Gabay <daniel.gabay@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20260506064301.f3ad9e3dc9d4.I75cf3555b7506d5b8bb30e70a0f3721ab73477cb@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/virtual/mac80211_hwsim_i.h

@@ -14,6 +14,27 @@
 #include "mac80211_hwsim.h"
 #include "mac80211_hwsim_nan.h"
 
+struct hwsim_sta_nan_sched {
+	/* Later members are protected by this lock */
+	spinlock_t lock;
+	u16 committed_dw;
+	struct {
+		u8 map_id;
+		struct cfg80211_chan_def chans[CFG80211_NAN_SCHED_NUM_TIME_SLOTS];
+	} maps[CFG80211_NAN_MAX_PEER_MAPS];
+};
+
+struct hwsim_sta_priv {
+	u32 magic;
+	unsigned int last_link;
+	u16 active_links_rx;
+
+	/* NAN peer schedule - must be accessed under nan_sched.lock */
+	struct hwsim_sta_nan_sched nan_sched;
+};
+
+#define HWSIM_STA_MAGIC	0x6d537749
+
 struct mac80211_hwsim_link_data {
 	u32 link_id;
 	u64 beacon_int	/* beacon interval in us */;

drivers/net/wireless/virtual/mac80211_hwsim_main.c

@@ -252,14 +252,6 @@ static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 	vp->magic = 0;
 }
 
-struct hwsim_sta_priv {
-	u32 magic;
-	unsigned int last_link;
-	u16 active_links_rx;
-};
-
-#define HWSIM_STA_MAGIC	0x6d537749
-
 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 {
 	struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
@@ -2652,6 +2644,9 @@ static void mac80211_hwsim_vif_info_changed(struct ieee80211_hw *hw,
 		vp->aid = vif->cfg.aid;
 	}
 
+	if (changed & BSS_CHANGED_NAN_LOCAL_SCHED)
+		mac80211_hwsim_nan_local_sched_changed(hw, vif);
+
 	if (vif->type == NL80211_IFTYPE_STATION &&
 	    changed & (BSS_CHANGED_MLD_VALID_LINKS | BSS_CHANGED_MLD_TTLM)) {
 		u16 usable_links = ieee80211_vif_usable_links(vif);
@@ -2818,6 +2813,8 @@ static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
 		sp->active_links_rx = sta->valid_links;
 	}
 
+	spin_lock_init(&sp->nan_sched.lock);
+
 	return 0;
 }
 
@@ -4245,6 +4242,7 @@ static int mac80211_hwsim_set_radar_background(struct ieee80211_hw *hw,
 	.start_nan = mac80211_hwsim_nan_start,			\
 	.stop_nan = mac80211_hwsim_nan_stop,			\
 	.nan_change_conf = mac80211_hwsim_nan_change_config,	\
+	.nan_peer_sched_changed = mac80211_hwsim_nan_peer_sched_changed, \
 	HWSIM_DEBUGFS_OPS
 
 #define HWSIM_NON_MLO_OPS					\

drivers/net/wireless/virtual/mac80211_hwsim_nan.c

@@ -1008,3 +1008,83 @@ bool mac80211_hwsim_nan_receive(struct ieee80211_hw *hw,
 
 	return false;
 }
+
+void mac80211_hwsim_nan_local_sched_changed(struct ieee80211_hw *hw,
+					    struct ieee80211_vif *vif)
+{
+	struct mac80211_hwsim_data *data = hw->priv;
+	struct ieee80211_nan_channel **slots = vif->cfg.nan_sched.schedule;
+
+	if (WARN_ON(vif->type != NL80211_IFTYPE_NAN))
+		return;
+
+	spin_lock_bh(&data->nan.state_lock);
+
+	for (int i = 0; i < ARRAY_SIZE(data->nan.local_sched); i++) {
+		struct ieee80211_chanctx_conf *chanctx;
+
+		if (!slots[i] || IS_ERR(slots[i])) {
+			memset(&data->nan.local_sched[i], 0,
+			       sizeof(data->nan.local_sched[i]));
+			continue;
+		}
+
+		chanctx = slots[i]->chanctx_conf;
+		if (!chanctx) {
+			memset(&data->nan.local_sched[i], 0,
+			       sizeof(data->nan.local_sched[i]));
+			continue;
+		}
+
+		data->nan.local_sched[i] = chanctx->def;
+	}
+
+	spin_unlock_bh(&data->nan.state_lock);
+}
+
+int mac80211_hwsim_nan_peer_sched_changed(struct ieee80211_hw *hw,
+					  struct ieee80211_sta *sta)
+{
+	struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
+	struct ieee80211_nan_peer_sched *sched = sta->nan_sched;
+
+	spin_lock_bh(&sp->nan_sched.lock);
+
+	/* Clear existing schedule */
+	sp->nan_sched.committed_dw = 0;
+	for (int i = 0; i < CFG80211_NAN_MAX_PEER_MAPS; i++) {
+		sp->nan_sched.maps[i].map_id = CFG80211_NAN_INVALID_MAP_ID;
+		memset(sp->nan_sched.maps[i].chans, 0,
+		       sizeof(sp->nan_sched.maps[i].chans));
+	}
+
+	if (!sched)
+		goto out;
+
+	sp->nan_sched.committed_dw = sched->committed_dw;
+
+	for (int i = 0; i < CFG80211_NAN_MAX_PEER_MAPS; i++) {
+		struct ieee80211_nan_peer_map *map = &sched->maps[i];
+
+		if (map->map_id == CFG80211_NAN_INVALID_MAP_ID)
+			continue;
+
+		sp->nan_sched.maps[i].map_id = map->map_id;
+
+		for (int j = 0; j < CFG80211_NAN_SCHED_NUM_TIME_SLOTS; j++) {
+			struct ieee80211_nan_channel *peer_chan =
+				map->slots[j];
+
+			if (peer_chan && peer_chan->chanreq.oper.chan)
+				sp->nan_sched.maps[i].chans[j] =
+					peer_chan->chanreq.oper;
+			else
+				memset(&sp->nan_sched.maps[i].chans[j], 0,
+				       sizeof(sp->nan_sched.maps[i].chans[j]));
+		}
+	}
+
+out:
+	spin_unlock_bh(&sp->nan_sched.lock);
+	return 0;
+}

drivers/net/wireless/virtual/mac80211_hwsim_nan.h

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * mac80211_hwsim_nan - NAN software simulation for mac80211_hwsim
- * Copyright (C) 2025 Intel Corporation
+ * Copyright (C) 2025-2026 Intel Corporation
  */
 
 #ifndef __MAC80211_HWSIM_NAN_H
@@ -52,6 +52,13 @@ struct mac80211_hwsim_nan_data {
 
 	bool tsf_adjusted;
 	bool tsf_discontinuity;
+
+	/*
+	 * Local schedule - stores channel definition for each 16TU slot.
+	 * Derived from NMI vif->cfg.nan_schedule. chan == NULL means not
+	 * available in that slot (except DW which is implicit).
+	 */
+	struct cfg80211_chan_def local_sched[CFG80211_NAN_SCHED_NUM_TIME_SLOTS];
 };
 
 enum hrtimer_restart
@@ -73,6 +80,9 @@ int mac80211_hwsim_nan_change_config(struct ieee80211_hw *hw,
 				     struct cfg80211_nan_conf *conf,
 				     u32 changes);
 
+int mac80211_hwsim_nan_peer_sched_changed(struct ieee80211_hw *hw,
+					  struct ieee80211_sta *sta);
+
 bool mac80211_hwsim_nan_txq_transmitting(struct ieee80211_hw *hw,
 					 struct ieee80211_txq *txq);
 
@@ -86,4 +96,7 @@ bool mac80211_hwsim_nan_receive(struct ieee80211_hw *hw,
 void mac80211_hwsim_nan_rx(struct ieee80211_hw *hw,
 			   struct sk_buff *skb);
 
+void mac80211_hwsim_nan_local_sched_changed(struct ieee80211_hw *hw,
+					    struct ieee80211_vif *vif);
+
 #endif /* __MAC80211_HWSIM_NAN_H */