[PATCH v4 1/2] remoteproc: Introduce traces for remoteproc events

[Gokul krishna Krishnakumar]

Adding Traces for the following remoteproc events:
	rproc_subdev_event,
	rproc_interrupt_event,
	rproc_load_event,
	rproc_start_event,
	rproc_stop_event

Signed-off-by: Gokul krishna Krishnakumar <quic_gokukris@xxxxxxxxxxx>
---
 drivers/remoteproc/Kconfig                    |   5 +
 drivers/remoteproc/Makefile                   |   1 +
 drivers/remoteproc/remoteproc_tracepoints.c   |  13 ++
 include/trace/events/remoteproc_tracepoints.h | 129 ++++++++++++++++++
 4 files changed, 148 insertions(+)
 create mode 100644 drivers/remoteproc/remoteproc_tracepoints.c
 create mode 100644 include/trace/events/remoteproc_tracepoints.h

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index a850e9f486dd..2ef4f527f1c1 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -365,6 +365,11 @@ config XLNX_R5_REMOTEPROC
 
 	  It's safe to say N if not interested in using RPU r5f cores.
 
+config REMOTEPROC_TRACEPOINTS
+	bool "Support for Remote Processor subsystem traces"
+	help
+	  Say y to add traces to the remoteproc events.
+
 endif # REMOTEPROC
 
 endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 91314a9b43ce..7045cde5ca76 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -10,6 +10,7 @@ remoteproc-y				+= remoteproc_debugfs.o
 remoteproc-y				+= remoteproc_sysfs.o
 remoteproc-y				+= remoteproc_virtio.o
 remoteproc-y				+= remoteproc_elf_loader.o
+obj-$(CONFIG_REMOTEPROC_TRACEPOINTS)	+= remoteproc_tracepoints.o
 obj-$(CONFIG_REMOTEPROC_CDEV)		+= remoteproc_cdev.o
 obj-$(CONFIG_IMX_REMOTEPROC)		+= imx_rproc.o
 obj-$(CONFIG_IMX_DSP_REMOTEPROC)	+= imx_dsp_rproc.o
diff --git a/drivers/remoteproc/remoteproc_tracepoints.c b/drivers/remoteproc/remoteproc_tracepoints.c
new file mode 100644
index 000000000000..f082441022c3
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_tracepoints.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/remoteproc_tracepoints.h>
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(rproc_load_event);
+EXPORT_TRACEPOINT_SYMBOL_GPL(rproc_start_event);
+EXPORT_TRACEPOINT_SYMBOL_GPL(rproc_stop_event);
+EXPORT_TRACEPOINT_SYMBOL_GPL(rproc_interrupt_event);
+EXPORT_TRACEPOINT_SYMBOL_GPL(rproc_subdev_event);
diff --git a/include/trace/events/remoteproc_tracepoints.h b/include/trace/events/remoteproc_tracepoints.h
new file mode 100644
index 000000000000..f2de61f42eb1
--- /dev/null
+++ b/include/trace/events/remoteproc_tracepoints.h
@@ -0,0 +1,129 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM remoteproc_tracepoints
+
+#if !defined(_TRACE_REMOTEPROC_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_REMOTEPROC_H
+#include <linux/tracepoint.h>
+#include <linux/remoteproc.h>
+
+/*
+ * Tracepoints for remoteproc and subdevice events
+ */
+TRACE_EVENT(rproc_load_event,
+
+	TP_PROTO(struct rproc *rproc, int ret),
+
+	TP_ARGS(rproc, ret),
+
+	TP_STRUCT__entry(
+		__string(name, rproc->name)
+		__string(firmware, rproc->firmware)
+		__field(int, ret)
+	),
+
+	TP_fast_assign(
+		__assign_str(name, rproc->name);
+		__assign_str(firmware, rproc->firmware);
+		__entry->ret = ret;
+	),
+
+	TP_printk("%s loading firmware %s returned %d",
+			__get_str(name), __get_str(firmware),
+			__entry->ret)
+);
+
+TRACE_EVENT(rproc_start_event,
+
+	TP_PROTO(struct rproc *rproc, int ret),
+
+	TP_ARGS(rproc, ret),
+
+	TP_STRUCT__entry(
+		__string(name, rproc->name)
+		__field(int, ret)
+	),
+
+	TP_fast_assign(
+		__assign_str(name, rproc->name);
+		__entry->ret = ret;
+	),
+
+	TP_printk("%s %d", __get_str(name), __entry->ret)
+);
+
+TRACE_EVENT(rproc_stop_event,
+
+	TP_PROTO(struct rproc *rproc, const char *crash_msg),
+
+	TP_ARGS(rproc, crash_msg),
+
+	TP_STRUCT__entry(
+		__string(name, rproc->name)
+		__string(crash_msg, crash_msg)
+	),
+
+	TP_fast_assign(
+		__assign_str(name, rproc->name);
+		__assign_str(crash_msg, crash_msg)
+	),
+
+	TP_printk("%s %s", __get_str(name), __get_str(crash_msg))
+);
+
+TRACE_EVENT(rproc_interrupt_event,
+
+	TP_PROTO(struct rproc *rproc, const char *event,
+			 const char *msg),
+
+	TP_ARGS(rproc, event, msg),
+
+	TP_STRUCT__entry(
+		__string(name, rproc->name)
+		__string(event, event)
+		__string(msg, msg)
+	),
+
+	TP_fast_assign(
+		__assign_str(name, rproc->name);
+		__assign_str(event, event);
+		__assign_str(msg, msg);
+	),
+
+	TP_printk("%s %s returned %s", __get_str(name),
+		 __get_str(event), __get_str(msg))
+);
+
+TRACE_EVENT(rproc_subdev_event,
+
+	TP_PROTO(const char *rproc, const char *subdev,
+			const char *event, int ret),
+
+	TP_ARGS(rproc, subdev, event, ret),
+
+	TP_STRUCT__entry(
+		__string(rproc, rproc)
+		__string(subdev, subdev)
+		__string(event, event)
+		__field(int, ret)
+	),
+
+	TP_fast_assign(
+		__assign_str(rproc, rproc);
+		__assign_str(subdev, subdev);
+		__assign_str(event, event);
+		__entry->ret = ret;
+	),
+
+	TP_printk("rproc:%s subdev:%s event:%s ret:%d",
+		__get_str(rproc), __get_str(subdev),
+		__get_str(event), __entry->ret)
+);
+#endif /* _TRACE_REMOTEPROC_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
-- 
2.40.1