From 57614c28843d4ec34c12ca67dd11411396aab55d Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 29 Apr 2024 13:32:14 +0900
Subject: firewire: core: add support for Linux kernel tracepoints

The Linux Kernel Tracepoints framework is enough useful to trace
packet data inbound to and outbound from core.

This commit adds firewire subsystem to use the framework.

Link: https://lore.kernel.org/r/20240429043218.609398-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
---
 drivers/firewire/Makefile       |  2 +-
 drivers/firewire/core-trace.c   |  5 +++++
 include/trace/events/firewire.h | 15 +++++++++++++++
 3 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 drivers/firewire/core-trace.c
 create mode 100644 include/trace/events/firewire.h

diff --git a/drivers/firewire/Makefile b/drivers/firewire/Makefile
index bbde29a0fba6..013e1f2641bd 100644
--- a/drivers/firewire/Makefile
+++ b/drivers/firewire/Makefile
@@ -3,7 +3,7 @@
 # Makefile for the Linux IEEE 1394 implementation
 #
 
-firewire-core-y += core-card.o core-cdev.o core-device.o \
+firewire-core-y += core-trace.o core-card.o core-cdev.o core-device.o \
                    core-iso.o core-topology.o core-transaction.o
 firewire-ohci-y += ohci.o
 firewire-sbp2-y += sbp2.o
diff --git a/drivers/firewire/core-trace.c b/drivers/firewire/core-trace.c
new file mode 100644
index 000000000000..96cbd9d384dc
--- /dev/null
+++ b/drivers/firewire/core-trace.c
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Takashi Sakamoto
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/firewire.h>
diff --git a/include/trace/events/firewire.h b/include/trace/events/firewire.h
new file mode 100644
index 000000000000..bc55eaabf695
--- /dev/null
+++ b/include/trace/events/firewire.h
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Takashi Sakamoto
+
+#define TRACE_SYSTEM	firewire
+
+#if !defined(_FIREWIRE_TRACE_EVENT_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _FIREWIRE_TRACE_EVENT_H
+
+#include <linux/tracepoint.h>
+
+// Placeholder for future use.
+
+#endif // _FIREWIRE_TRACE_EVENT_H
+
+#include <trace/define_trace.h>
-- 
cgit