[PATCH 3/8] drm/xe: Add GPU frequency tracing tracepoint definition

[S Sebinraj]

Add tracepoint definition for GPU frequency monitoring under the
'power' trace system. The tracepoint will be available at:
/sys/kernel/debug/tracing/events/power/gpu_frequency

The tracepoint format includes:
- state: GPU frequency in KHz
- gpu_id: GT ID

This provides the ftrace infrastructure for monitoring GPU frequency
changes that will be utilized by the frequency tracer implementation.

Signed-off-by: S Sebinraj <s.sebinraj at intel.com>
---
 drivers/gpu/drm/xe/xe_gpufreqtracer_trace.h | 48 +++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 drivers/gpu/drm/xe/xe_gpufreqtracer_trace.h

diff --git a/drivers/gpu/drm/xe/xe_gpufreqtracer_trace.h b/drivers/gpu/drm/xe/xe_gpufreqtracer_trace.h
new file mode 100644
index 000000000000..5664db62e3fb
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_gpufreqtracer_trace.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM power
+
+#if !defined(_XE_GPUFREQTRACER_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _XE_GPUFREQTRACER_TRACE_H
+
+#include <linux/tracepoint.h>
+
+/*
+ * Tracepoint for GPU frequency changes
+ * This tracepoint is exposed at /sys/kernel/debug/tracing/events/power/gpu_frequency
+ *
+ * location: /d/events/power/gpu_frequency
+ * format: {unsigned int state, unsigned int gpu_id}
+ * where state holds the frequency(in Khz) and the gpu_id holds the GPU clock domain.
+ */
+
+TRACE_EVENT(gpu_frequency,
+	TP_PROTO(unsigned int state, unsigned int gpu_id),
+
+	TP_ARGS(state, gpu_id),
+
+	TP_STRUCT__entry(
+		__field(unsigned int, state)
+		__field(unsigned int, gpu_id)
+	),
+
+	TP_fast_assign(
+		__entry->state = state;
+		__entry->gpu_id = gpu_id;
+	),
+
+	TP_printk("state=%u gpu_id=%u", __entry->state, __entry->gpu_id)
+);
+
+#endif /* _XE_GPUFREQTRACER_TRACE_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE xe_gpufreqtracer_trace
+#include <trace/define_trace.h>
-- 
2.34.1