[PATCH v6 3/8] drm/xe/guc: Expose engine activity only for supported GuC version

[Riana Tauro]

Engine activity is supported only on GuC submission version >= 1.14.1
Allow enabling/reading engine activity only on supported
GuC versions. Warn once if not supported.

v2: use guc interface version (John)
v3: use debug log (Umesh)
v4: use variable for supported and use gt logs
    use a friendlier log message (Michal)
v5: fix kernel-doc
    do not continue in init if not supported (Michal)

Cc: John Harrison <John.C.Harrison at Intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Signed-off-by: Riana Tauro <riana.tauro at intel.com>
---
 drivers/gpu/drm/xe/xe_guc_engine_activity.c   | 49 ++++++++++++++++++-
 drivers/gpu/drm/xe/xe_guc_engine_activity.h   |  1 +
 .../gpu/drm/xe/xe_guc_engine_activity_types.h |  3 ++
 3 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_engine_activity.c b/drivers/gpu/drm/xe/xe_guc_engine_activity.c
index a424527eddb6..ed4080b7493a 100644
--- a/drivers/gpu/drm/xe/xe_guc_engine_activity.c
+++ b/drivers/gpu/drm/xe/xe_guc_engine_activity.c
@@ -95,6 +95,27 @@ static void free_engine_activity_buffers(struct engine_activity_buffer *buffer)
 	xe_bo_unpin_map_no_vm(buffer->activity_bo);
 }
 
+static bool is_engine_activity_supported(struct xe_guc *guc)
+{
+	struct xe_uc_fw_version *version = &guc->fw.versions.found[XE_UC_FW_VER_COMPATIBILITY];
+	struct xe_gt *gt = guc_to_gt(guc);
+
+	if (IS_SRIOV_VF(gt_to_xe(gt))) {
+		xe_gt_info(gt, "engine activity stats not supported on VFs\n");
+		return false;
+	}
+
+	/* engine activity stats is supported from GuC interface version (1.14.1) */
+	if (GUC_SUBMIT_VER(guc) < MAKE_GUC_VER(1, 14, 1)) {
+		xe_gt_info(gt,
+			   "engine activity stats unsupported in GuC interface v%u.%u.%u, need v%u.%u.%u or higher\n",
+			   version->major, version->minor, version->patch, 1, 14, 1);
+		return false;
+	}
+
+	return true;
+}
+
 static struct engine_activity *hw_engine_to_engine_activity(struct xe_hw_engine *hwe)
 {
 	struct xe_guc *guc = &hwe->gt->uc.guc;
@@ -251,6 +272,9 @@ static u32 gpm_timestamp_shift(struct xe_gt *gt)
  */
 u64 xe_guc_engine_activity_active_ticks(struct xe_guc *guc, struct xe_hw_engine *hwe)
 {
+	if (!xe_guc_engine_activity_supported(guc))
+		return 0;
+
 	return get_engine_active_ticks(guc, hwe);
 }
 
@@ -263,9 +287,27 @@ u64 xe_guc_engine_activity_active_ticks(struct xe_guc *guc, struct xe_hw_engine
  */
 u64 xe_guc_engine_activity_total_ticks(struct xe_guc *guc, struct xe_hw_engine *hwe)
 {
+	if (!xe_guc_engine_activity_supported(guc))
+		return 0;
+
 	return get_engine_total_ticks(guc, hwe);
 }
 
+/**
+ * xe_guc_engine_activity_supported - Check support for engine activity stats
+ * @guc: The GuC object
+ *
+ * Engine activity stats is supported from GuC interface version (1.14.1)
+ *
+ * Return: true if engine activity stats supported, false otherwise
+ */
+bool xe_guc_engine_activity_supported(struct xe_guc *guc)
+{
+	struct xe_guc_engine_activity *engine_activity = &guc->engine_activity;
+
+	return engine_activity->supported;
+}
+
 /**
  * xe_guc_engine_activity_enable_stats - Enable engine activity stats
  * @guc: The GuC object
@@ -276,6 +318,9 @@ void xe_guc_engine_activity_enable_stats(struct xe_guc *guc)
 {
 	int ret;
 
+	if (!xe_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);
@@ -301,10 +346,10 @@ int xe_guc_engine_activity_init(struct xe_guc *guc)
 {
 	struct xe_guc_engine_activity *engine_activity = &guc->engine_activity;
 	struct xe_gt *gt = guc_to_gt(guc);
-	struct xe_device *xe = gt_to_xe(gt);
 	int ret;
 
-	if (IS_SRIOV_VF(xe))
+	engine_activity->supported = is_engine_activity_supported(guc);
+	if (!engine_activity->supported)
 		return 0;
 
 	ret = allocate_engine_activity_group(guc);
diff --git a/drivers/gpu/drm/xe/xe_guc_engine_activity.h b/drivers/gpu/drm/xe/xe_guc_engine_activity.h
index e92d2456698d..a042d4cb404c 100644
--- a/drivers/gpu/drm/xe/xe_guc_engine_activity.h
+++ b/drivers/gpu/drm/xe/xe_guc_engine_activity.h
@@ -12,6 +12,7 @@ struct xe_hw_engine;
 struct xe_guc;
 
 int xe_guc_engine_activity_init(struct xe_guc *guc);
+bool xe_guc_engine_activity_supported(struct xe_guc *guc);
 void xe_guc_engine_activity_enable_stats(struct xe_guc *guc);
 u64 xe_guc_engine_activity_active_ticks(struct xe_guc *guc, struct xe_hw_engine *hwe);
 u64 xe_guc_engine_activity_total_ticks(struct xe_guc *guc, struct xe_hw_engine *hwe);
diff --git a/drivers/gpu/drm/xe/xe_guc_engine_activity_types.h b/drivers/gpu/drm/xe/xe_guc_engine_activity_types.h
index a2ab327d3eec..5cdd034b6b70 100644
--- a/drivers/gpu/drm/xe/xe_guc_engine_activity_types.h
+++ b/drivers/gpu/drm/xe/xe_guc_engine_activity_types.h
@@ -79,6 +79,9 @@ struct xe_guc_engine_activity {
 	/** @num_activity_group: number of activity groups */
 	u32 num_activity_group;
 
+	/** @supported: indicates support for engine activity stats */
+	bool supported;
+
 	/** @eag: holds the device level engine activity data */
 	struct engine_activity_group *eag;
 
-- 
2.47.1