wifi: mac80211: pass link_id to channel switch ops

For CSA to work correctly in multi-link scenarios, pass
the link_id to the relevant callbacks.

While at it, unify/deduplicate the tracing for them.
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Link: https://msgid.link/20240228095718.b7726635c054.I0be5d00af4acb48cfbd23a9dbf067f9aeb66469d@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/mac80211.h

@@ -1763,8 +1763,9 @@ struct ieee80211_conf {
  * @chandef: the new channel to switch to
  * @count: the number of TBTT's until the channel switch event
  * @delay: maximum delay between the time the AP transmitted the last beacon in
-  *	current channel and the expected time of the first beacon in the new
-  *	channel, expressed in TU.
+ *	current channel and the expected time of the first beacon in the new
+ *	channel, expressed in TU.
+ * @link_id: the link ID of the link doing the channel switch, 0 for non-MLO
  */
 struct ieee80211_channel_switch {
 	u64 timestamp;
@@ -1772,6 +1773,7 @@ struct ieee80211_channel_switch {
 	bool block_tx;
 	struct cfg80211_chan_def chandef;
 	u8 count;
+	u8 link_id;
 	u32 delay;
 };
 

net/mac80211/cfg.c

@@ -3931,7 +3931,9 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_chan_req chanreq = { .oper = params->chandef };
 	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_channel_switch ch_switch;
+	struct ieee80211_channel_switch ch_switch = {
+		.link_id = params->link_id,
+	};
 	struct ieee80211_chanctx_conf *conf;
 	struct ieee80211_chanctx *chanctx;
 	struct ieee80211_bss_conf *link_conf;

net/mac80211/mlme.c

@@ -2021,7 +2021,9 @@ ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
 	struct ieee80211_chanctx *chanctx;
 	enum nl80211_band current_band;
 	struct ieee80211_csa_ie csa_ie;
-	struct ieee80211_channel_switch ch_switch;
+	struct ieee80211_channel_switch ch_switch = {
+		.link_id = link->link_id,
+	};
 	struct ieee80211_bss *bss;
 	unsigned long timeout;
 	int res;

net/mac80211/trace.h

@@ -1209,7 +1209,7 @@ DEFINE_EVENT(sta_event, drv_flush_sta,
 	TP_ARGS(local, sdata, sta)
 );
 
-TRACE_EVENT(drv_channel_switch,
+DECLARE_EVENT_CLASS(chanswitch_evt,
 	TP_PROTO(struct ieee80211_local *local,
 		 struct ieee80211_sub_if_data *sdata,
 		 struct ieee80211_channel_switch *ch_switch),
@@ -1224,6 +1224,7 @@ TRACE_EVENT(drv_channel_switch,
 		__field(u32, device_timestamp)
 		__field(bool, block_tx)
 		__field(u8, count)
+		__field(u8, link_id)
 	),
 
 	TP_fast_assign(
@@ -1234,14 +1235,24 @@ TRACE_EVENT(drv_channel_switch,
 		__entry->device_timestamp = ch_switch->device_timestamp;
 		__entry->block_tx = ch_switch->block_tx;
 		__entry->count = ch_switch->count;
+		__entry->link_id = ch_switch->link_id;
 	),
 
 	TP_printk(
-		LOCAL_PR_FMT VIF_PR_FMT " new " CHANDEF_PR_FMT " count:%d",
-		LOCAL_PR_ARG, VIF_PR_ARG, CHANDEF_PR_ARG, __entry->count
+		LOCAL_PR_FMT VIF_PR_FMT CHANDEF_PR_FMT  " count:%d block_tx:%d timestamp:%llu device_ts:%u link_id:%d",
+		LOCAL_PR_ARG, VIF_PR_ARG, CHANDEF_PR_ARG, __entry->count,
+		__entry->block_tx, __entry->timestamp,
+		__entry->device_timestamp, __entry->link_id
 	)
 );
 
+DEFINE_EVENT(chanswitch_evt, drv_channel_switch,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_channel_switch *ch_switch),
+	TP_ARGS(local, sdata, ch_switch)
+);
+
 TRACE_EVENT(drv_set_antenna,
 	TP_PROTO(struct ieee80211_local *local, u32 tx_ant, u32 rx_ant, int ret),
 
@@ -2121,39 +2132,11 @@ TRACE_EVENT(drv_channel_switch_beacon,
 	)
 );
 
-TRACE_EVENT(drv_pre_channel_switch,
+DEFINE_EVENT(chanswitch_evt, drv_pre_channel_switch,
 	TP_PROTO(struct ieee80211_local *local,
 		 struct ieee80211_sub_if_data *sdata,
 		 struct ieee80211_channel_switch *ch_switch),
-
-	TP_ARGS(local, sdata, ch_switch),
-
-	TP_STRUCT__entry(
-		LOCAL_ENTRY
-		VIF_ENTRY
-		CHANDEF_ENTRY
-		__field(u64, timestamp)
-		__field(u32, device_timestamp)
-		__field(bool, block_tx)
-		__field(u8, count)
-	),
-
-	TP_fast_assign(
-		LOCAL_ASSIGN;
-		VIF_ASSIGN;
-		CHANDEF_ASSIGN(&ch_switch->chandef)
-		__entry->timestamp = ch_switch->timestamp;
-		__entry->device_timestamp = ch_switch->device_timestamp;
-		__entry->block_tx = ch_switch->block_tx;
-		__entry->count = ch_switch->count;
-	),
-
-	TP_printk(
-		LOCAL_PR_FMT VIF_PR_FMT " prepare channel switch to "
-		CHANDEF_PR_FMT  " count:%d block_tx:%d timestamp:%llu",
-		LOCAL_PR_ARG, VIF_PR_ARG, CHANDEF_PR_ARG, __entry->count,
-		__entry->block_tx, __entry->timestamp
-	)
+	TP_ARGS(local, sdata, ch_switch)
 );
 
 DEFINE_EVENT(local_sdata_evt, drv_post_channel_switch,
@@ -2168,40 +2151,11 @@ DEFINE_EVENT(local_sdata_evt, drv_abort_channel_switch,
 	     TP_ARGS(local, sdata)
 );
 
-TRACE_EVENT(drv_channel_switch_rx_beacon,
+DEFINE_EVENT(chanswitch_evt, drv_channel_switch_rx_beacon,
 	TP_PROTO(struct ieee80211_local *local,
 		 struct ieee80211_sub_if_data *sdata,
 		 struct ieee80211_channel_switch *ch_switch),
-
-	TP_ARGS(local, sdata, ch_switch),
-
-	TP_STRUCT__entry(
-		LOCAL_ENTRY
-		VIF_ENTRY
-		CHANDEF_ENTRY
-		__field(u64, timestamp)
-		__field(u32, device_timestamp)
-		__field(bool, block_tx)
-		__field(u8, count)
-	),
-
-	TP_fast_assign(
-		LOCAL_ASSIGN;
-		VIF_ASSIGN;
-		CHANDEF_ASSIGN(&ch_switch->chandef)
-		__entry->timestamp = ch_switch->timestamp;
-		__entry->device_timestamp = ch_switch->device_timestamp;
-		__entry->block_tx = ch_switch->block_tx;
-		__entry->count = ch_switch->count;
-	),
-
-	TP_printk(
-		LOCAL_PR_FMT VIF_PR_FMT
-		" received a channel switch beacon to "
-		CHANDEF_PR_FMT  " count:%d block_tx:%d timestamp:%llu",
-		LOCAL_PR_ARG, VIF_PR_ARG, CHANDEF_PR_ARG, __entry->count,
-		__entry->block_tx, __entry->timestamp
-	)
+	TP_ARGS(local, sdata, ch_switch)
 );
 
 TRACE_EVENT(drv_get_txpower,