[PATCH 6/7] drm/xe/guc: Expose engine busyness only for supported GuC version

[Riana Tauro]

Engine busyness is supported only on GuC versions >= 70.32.0
Allow enabling/reading engine busyness only on supported
GuC versions. Warn once if not supported.

Signed-off-by: Riana Tauro <riana.tauro at intel.com>
---
 drivers/gpu/drm/xe/xe_engine_activity.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_engine_activity.c b/drivers/gpu/drm/xe/xe_engine_activity.c
index 7a2ae09d23de..fc34dcf3057a 100644
--- a/drivers/gpu/drm/xe/xe_engine_activity.c
+++ b/drivers/gpu/drm/xe/xe_engine_activity.c
@@ -236,6 +236,16 @@ static u32 gpm_timestamp_shift(struct xe_gt *gt)
 	return 3 - REG_FIELD_GET(RPM_CONFIG0_CTC_SHIFT_PARAMETER_MASK, reg);
 }
 
+static bool guc_engine_activity_supported(struct xe_guc *guc)
+{
+	if (GUC_FIRMWARE_VER(guc) >= MAKE_GUC_VER(70, 32, 0))
+		return true;
+
+	drm_WARN_ON_ONCE(&guc_to_xe(guc)->drm,
+			 "Engine busyness not supported in this GuC version\n");
+	return false;
+}
+
 /**
  * xe_engine_activity_get_active_ticks - Get engine active ticks
  * @hwe: The hw_engine object
@@ -246,6 +256,9 @@ u64 xe_engine_activity_get_active_ticks(struct xe_hw_engine *hwe)
 {
 	struct xe_guc *guc =  &hwe->gt->uc.guc;
 
+	if (!guc_engine_activity_supported(guc))
+		return 0;
+
 	return get_engine_active_ticks(guc, hwe);
 }
 
@@ -259,6 +272,9 @@ u64 xe_engine_activity_get_total_ticks(struct xe_hw_engine *hwe)
 {
 	struct xe_guc *guc =  &hwe->gt->uc.guc;
 
+	if (!guc_engine_activity_supported(guc))
+		return 0;
+
 	return get_engine_total_ticks(guc, hwe);
 }
 
@@ -272,6 +288,9 @@ void xe_engine_activity_enable_stats(struct xe_guc *guc)
 {
 	int ret;
 
+	if (!guc_engine_activity_supported(guc))
+		return;
+
 	ret = enable_engine_activity_stats(guc);
 	if (ret)
 		xe_gt_err(guc_to_gt(guc), "failed to enable activity stats%d\n", ret);
@@ -298,6 +317,9 @@ int xe_engine_activity_init(struct xe_guc *guc)
 	struct xe_gt *gt = guc_to_gt(guc);
 	int ret;
 
+	if (!guc_engine_activity_supported(guc))
+		return 0;
+
 	ret = allocate_activity_group(engine_busy);
 	if (ret) {
 		xe_gt_err(gt, "failed to allocate activity group %d\n", ret);
-- 
2.40.0