[PATCH 4/9] drm/amd/powerplay: add control method to bypass metrics cache on Arcturus

[Evan Quan]

As for the gpu metric export, metrics cache makes no sense. It's up to
user to decide how often the metrics should be retrieved.

Change-Id: Ie6e9377f5984c3c09737b323c52249f9189bcaf5
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/powerplay/arcturus_ppt.c | 74 +++++++++++++-------
 1 file changed, 49 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
index 39bfe0ebfea3..d678534ddc69 100644
--- a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
@@ -541,18 +541,16 @@ static int arcturus_freqs_in_same_level(int32_t frequency1,
 	return (abs(frequency1 - frequency2) <= EPSILON);
 }
 
-static int arcturus_get_smu_metrics_data(struct smu_context *smu,
-					 MetricsMember_t member,
-					 uint32_t *value)
+static int arcturus_get_metrics_table_locked(struct smu_context *smu,
+					     SmuMetrics_t *metrics_table,
+					     bool bypass_cache)
 {
 	struct smu_table_context *smu_table= &smu->smu_table;
-	SmuMetrics_t *metrics = (SmuMetrics_t *)smu_table->metrics_table;
 	int ret = 0;
 
-	mutex_lock(&smu->metrics_lock);
-
-	if (!smu_table->metrics_time ||
-	     time_after(jiffies, smu_table->metrics_time + msecs_to_jiffies(1))) {
+	if (bypass_cache ||
+	    !smu_table->metrics_time ||
+	    time_after(jiffies, smu_table->metrics_time + msecs_to_jiffies(1))) {
 		ret = smu_cmn_update_table(smu,
 				       SMU_TABLE_SMU_METRICS,
 				       0,
@@ -560,12 +558,50 @@ static int arcturus_get_smu_metrics_data(struct smu_context *smu,
 				       false);
 		if (ret) {
 			dev_info(smu->adev->dev, "Failed to export SMU metrics table!\n");
-			mutex_unlock(&smu->metrics_lock);
 			return ret;
 		}
 		smu_table->metrics_time = jiffies;
 	}
 
+	if (metrics_table)
+		memcpy(metrics_table, smu_table->metrics_table, sizeof(SmuMetrics_t));
+
+	return 0;
+}
+
+static int arcturus_get_metrics_table(struct smu_context *smu,
+				      SmuMetrics_t *metrics_table,
+				      bool bypass_cache)
+{
+	int ret = 0;
+
+	mutex_lock(&smu->metrics_lock);
+	ret = arcturus_get_metrics_table_locked(smu,
+						metrics_table,
+						bypass_cache);
+	mutex_unlock(&smu->metrics_lock);
+
+	return ret;
+}
+
+static int arcturus_get_smu_metrics_data(struct smu_context *smu,
+					 MetricsMember_t member,
+					 uint32_t *value)
+{
+	struct smu_table_context *smu_table= &smu->smu_table;
+	SmuMetrics_t *metrics = (SmuMetrics_t *)smu_table->metrics_table;
+	int ret = 0;
+
+	mutex_lock(&smu->metrics_lock);
+
+	ret = arcturus_get_metrics_table_locked(smu,
+						NULL,
+						false);
+	if (ret) {
+		mutex_unlock(&smu->metrics_lock);
+		return ret;
+	}
+
 	switch (member) {
 	case METRICS_CURR_GFXCLK:
 		*value = metrics->CurrClock[PPCLK_GFXCLK];
@@ -2285,23 +2321,11 @@ static ssize_t arcturus_get_gpu_metrics(struct smu_context *smu,
 	SmuMetrics_t metrics;
 	int ret = 0;
 
-	mutex_lock(&smu->metrics_lock);
-
-	ret = smu_cmn_update_table(smu,
-				   SMU_TABLE_SMU_METRICS,
-				   0,
-				   smu_table->metrics_table,
-				   false);
-	if (ret) {
-		dev_info(smu->adev->dev, "Failed to export SMU metrics table!\n");
-		mutex_unlock(&smu->metrics_lock);
+	ret = arcturus_get_metrics_table(smu,
+					 &metrics,
+					 true);
+	if (ret)
 		return ret;
-	}
-	smu_table->metrics_time = jiffies;
-
-	memcpy(&metrics, smu_table->metrics_table, sizeof(SmuMetrics_t));
-
-	mutex_unlock(&smu->metrics_lock);
 
 	smu_v11_0_init_gpu_metrics_v1_0(gpu_metrics);
 
-- 
2.28.0