ath10k: add trace event for WMI_DEBUG_MESG_EVENTID

Send firmware WMI debug logs to user space for further processing.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/trace.h

@@ -182,6 +182,27 @@ TRACE_EVENT(ath10k_htt_stats,
 	)
 );
 
+TRACE_EVENT(ath10k_wmi_dbglog,
+	TP_PROTO(void *buf, size_t buf_len),
+
+	TP_ARGS(buf, buf_len),
+
+	TP_STRUCT__entry(
+		__field(size_t, buf_len)
+		__dynamic_array(u8, buf, buf_len)
+	),
+
+	TP_fast_assign(
+		__entry->buf_len = buf_len;
+		memcpy(__get_dynamic_array(buf), buf, buf_len);
+	),
+
+	TP_printk(
+		"len %zu",
+		__entry->buf_len
+	)
+);
+
 #endif /* _TRACE_H_ || TRACE_HEADER_MULTI_READ*/
 
 /* we don't want to use include/trace/events */

drivers/net/wireless/ath/ath10k/wmi.c

@@ -1071,9 +1071,14 @@ static void ath10k_wmi_event_echo(struct ath10k *ar, struct sk_buff *skb)
 	ath10k_dbg(ATH10K_DBG_WMI, "WMI_ECHO_EVENTID\n");
 }
 
-static void ath10k_wmi_event_debug_mesg(struct ath10k *ar, struct sk_buff *skb)
+static int ath10k_wmi_event_debug_mesg(struct ath10k *ar, struct sk_buff *skb)
 {
-	ath10k_dbg(ATH10K_DBG_WMI, "WMI_DEBUG_MESG_EVENTID\n");
+	ath10k_dbg(ATH10K_DBG_WMI, "wmi event debug mesg len %d\n",
+		   skb->len);
+
+	trace_ath10k_wmi_dbglog(skb->data, skb->len);
+
+	return 0;
 }
 
 static void ath10k_wmi_event_update_stats(struct ath10k *ar,