wifi: cfg80211: send link id in channel_switch ops

Currently, during channel switch, no link id information is passed down.
In order to support channel switch during Multi Link Operation, it is
required to pass link id as well.

Add changes to pass link id in the channel_switch cfg80211_ops.
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Link: https://msgid.link/20240130140918.1172387-2-quic_adisi@quicinc.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/cfg80211.h

@@ -1543,6 +1543,8 @@ struct cfg80211_ap_update {
  * @radar_required: whether radar detection is required on the new channel
  * @block_tx: whether transmissions should be blocked while changing
  * @count: number of beacons until switch
+ * @link_id: defines the link on which channel switch is expected during
+ *	MLO. 0 in case of non-MLO.
  */
 struct cfg80211_csa_settings {
 	struct cfg80211_chan_def chandef;
@@ -1555,6 +1557,7 @@ struct cfg80211_csa_settings {
 	bool radar_required;
 	bool block_tx;
 	u8 count;
+	u8 link_id;
 };
 
 /**

net/wireless/nl80211.c

@@ -10222,6 +10222,7 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
 	if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
 		params.block_tx = true;
 
+	params.link_id = link_id;
 	err = rdev_channel_switch(rdev, dev, &params);
 
 free:

net/wireless/trace.h

@@ -2332,6 +2332,7 @@ TRACE_EVENT(rdev_channel_switch,
 		__field(u8, count)
 		__dynamic_array(u16, bcn_ofs, params->n_counter_offsets_beacon)
 		__dynamic_array(u16, pres_ofs, params->n_counter_offsets_presp)
+		__field(u8, link_id)
 	),
 	TP_fast_assign(
 		WIPHY_ASSIGN;
@@ -2349,11 +2350,13 @@ TRACE_EVENT(rdev_channel_switch,
 			memcpy(__get_dynamic_array(pres_ofs),
 			       params->counter_offsets_presp,
 			       params->n_counter_offsets_presp * sizeof(u16));
+		__entry->link_id = params->link_id;
 	),
 	TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", " CHAN_DEF_PR_FMT
-		  ", block_tx: %d, count: %u, radar_required: %d",
+		  ", block_tx: %d, count: %u, radar_required: %d, link_id: %d",
 		  WIPHY_PR_ARG, NETDEV_PR_ARG, CHAN_DEF_PR_ARG,
-		  __entry->block_tx, __entry->count, __entry->radar_required)
+		  __entry->block_tx, __entry->count, __entry->radar_required,
+		  __entry->link_id)
 );
 
 TRACE_EVENT(rdev_set_qos_map,