brcmfmac: add hexadecimal trace of message payload

Adds a trace function used in brcmf_dbg_hex_dump() which adds the
raw binary data to the trace. It requires trace-cmd plugin to see
this data.
Reviewed-by: Piotr Haber <phaber@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.h

@@ -93,6 +93,7 @@ do {								\
 
 #define brcmf_dbg_hex_dump(test, data, len, fmt, ...)			\
 do {									\
+	trace_brcmf_hexdump((void *)data, len);				\
 	if (test)							\
 		brcmu_dbg_hex_dump(data, len, fmt, ##__VA_ARGS__);	\
 } while (0)

drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c

@@ -94,6 +94,7 @@ struct rte_console {
 
 #include "dhd_bus.h"
 #include "dhd_dbg.h"
+#include "tracepoint.h"
 
 #define TXQLEN		2048	/* bulk tx queue length */
 #define TXHI		(TXQLEN - 256)	/* turn on flow control above TXHI */

drivers/net/wireless/brcm80211/brcmfmac/fweh.c

@@ -20,6 +20,7 @@
 
 #include "dhd.h"
 #include "dhd_dbg.h"
+#include "tracepoint.h"
 #include "fwsignal.h"
 #include "fweh.h"
 #include "fwil.h"

drivers/net/wireless/brcm80211/brcmfmac/fwil.c

@@ -25,6 +25,7 @@
 #include "dhd.h"
 #include "dhd_bus.h"
 #include "dhd_dbg.h"
+#include "tracepoint.h"
 #include "fwil.h"
 
 

drivers/net/wireless/brcm80211/brcmfmac/tracepoint.h

@@ -73,6 +73,20 @@ TRACE_EVENT(brcmf_dbg,
 	TP_printk("%s: %s", __get_str(func), __get_str(msg))
 );
 
+TRACE_EVENT(brcmf_hexdump,
+	TP_PROTO(void *data, size_t len),
+	TP_ARGS(data, len),
+	TP_STRUCT__entry(
+		__field(unsigned long, len)
+		__dynamic_array(u8, hdata, len)
+	),
+	TP_fast_assign(
+		__entry->len = len;
+		memcpy(__get_dynamic_array(hdata), data, len);
+	),
+	TP_printk("hexdump [length=%lu]", __entry->len)
+);
+
 #ifdef CONFIG_BRCM_TRACING
 
 #undef TRACE_INCLUDE_PATH

drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c

@@ -26,6 +26,7 @@
 #include <brcmu_wifi.h>
 #include "dhd.h"
 #include "dhd_dbg.h"
+#include "tracepoint.h"
 #include "fwil_types.h"
 #include "p2p.h"
 #include "wl_cfg80211.h"