[PATCH 2/8] drm/xe: Add module parameter for GPU frequency monitoring

[S Sebinraj]

Add gpufreq_monitoring_interval_ms module parameter to configure
the interval for GPU frequency monitoring. The parameter is only
available when CONFIG_DRM_XE_GPUFREQTRACER is enabled.

Default value is 5000ms (5 seconds) with valid range of 100-10000ms.
The parameter can be modified at runtime via sysfs.

Signed-off-by: S Sebinraj <s.sebinraj at intel.com>
---
 drivers/gpu/drm/xe/xe_module.c | 12 ++++++++++++
 drivers/gpu/drm/xe/xe_module.h |  3 +++
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_module.c b/drivers/gpu/drm/xe/xe_module.c
index d08338fc3bc1..f5d4f8bca61f 100644
--- a/drivers/gpu/drm/xe/xe_module.c
+++ b/drivers/gpu/drm/xe/xe_module.c
@@ -31,6 +31,7 @@
 #define DEFAULT_MAX_VFS_STR		"unlimited"
 #define DEFAULT_WEDGED_MODE		1
 #define DEFAULT_SVM_NOTIFIER_SIZE	512
+#define DEFAULT_GPUFREQ_MONITORING_INTERVAL_MS	5000
 
 struct xe_modparam xe_modparam = {
 	.probe_display =	DEFAULT_PROBE_DISPLAY,
@@ -41,6 +42,9 @@ struct xe_modparam xe_modparam = {
 #endif
 	.wedged_mode =		DEFAULT_WEDGED_MODE,
 	.svm_notifier_size =	DEFAULT_SVM_NOTIFIER_SIZE,
+#ifdef CONFIG_DRM_XE_GPUFREQTRACER
+	.gpufreq_monitoring_interval_ms = DEFAULT_GPUFREQ_MONITORING_INTERVAL_MS,
+#endif
 	/* the rest are 0 by default */
 };
 
@@ -93,6 +97,14 @@ MODULE_PARM_DESC(wedged_mode,
 		 "Module's default policy for the wedged mode (0=never, 1=upon-critical-errors, 2=upon-any-hang "
 		 "[default=" __stringify(DEFAULT_WEDGED_MODE) "])");
 
+#ifdef CONFIG_DRM_XE_GPUFREQTRACER
+module_param_named(gpufreq_monitoring_interval_ms,
+		   xe_modparam.gpufreq_monitoring_interval_ms, uint, 0644);
+MODULE_PARM_DESC(gpufreq_monitoring_interval_ms,
+		 "GPU frequency monitoring interval in milliseconds (100-10000, default: "
+		 __stringify(DEFAULT_GPUFREQ_MONITORING_INTERVAL_MS) ")");
+#endif
+
 static int xe_check_nomodeset(void)
 {
 	if (drm_firmware_drivers_only())
diff --git a/drivers/gpu/drm/xe/xe_module.h b/drivers/gpu/drm/xe/xe_module.h
index 5a3bfea8b7b4..fd60de38d24d 100644
--- a/drivers/gpu/drm/xe/xe_module.h
+++ b/drivers/gpu/drm/xe/xe_module.h
@@ -23,6 +23,9 @@ struct xe_modparam {
 #endif
 	int wedged_mode;
 	u32 svm_notifier_size;
+#ifdef CONFIG_DRM_XE_GPUFREQTRACER
+	u32 gpufreq_monitoring_interval_ms;
+#endif
 };
 
 extern struct xe_modparam xe_modparam;
-- 
2.34.1