1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/pmu/pmu_perfmon.c b/drivers/gpu/nvgpu/common/pmu/pmu_perfmon.c
index 57a4ea40..bf07bd79 100644
--- a/drivers/gpu/nvgpu/common/pmu/pmu_perfmon.c
+++ b/drivers/gpu/nvgpu/common/pmu/pmu_perfmon.c
@@ -236,6 +236,48 @@ int nvgpu_pmu_load_update(struct gk20a *g)
         return 0;
 }
 
+int nvgpu_pmu_busy_cycles_norm(struct gk20a *g, u32 *norm)
+{
+        u64 busy_cycles, total_cycles;
+        u32 intr_status;
+
+        gk20a_busy_noresume(g);
+        if (!g->power_on) {
+                *norm = 0;
+                goto exit;
+        }
+
+        if (g->ops.pmu.pmu_read_idle_counter == NULL ||
+            g->ops.pmu.pmu_reset_idle_counter == NULL ||
+            g->ops.pmu.pmu_read_idle_intr_status == NULL ||
+            g->ops.pmu.pmu_clear_idle_intr_status == NULL) {
+                *norm = PMU_BUSY_CYCLES_NORM_MAX;
+                goto exit;
+        }
+
+        busy_cycles = g->ops.pmu.pmu_read_idle_counter(g, 4);
+        total_cycles = g->ops.pmu.pmu_read_idle_counter(g, 0);
+        intr_status = g->ops.pmu.pmu_read_idle_intr_status(g);
+
+        g->ops.pmu.pmu_reset_idle_counter(g, 4);
+        g->ops.pmu.pmu_reset_idle_counter(g, 0);
+
+        if (intr_status != 0UL) {
+                *norm = PMU_BUSY_CYCLES_NORM_MAX;
+                g->ops.pmu.pmu_clear_idle_intr_status(g);
+        } else if (total_cycles == 0ULL || busy_cycles > total_cycles) {
+                *norm = PMU_BUSY_CYCLES_NORM_MAX;
+        } else {
+                *norm = (u32)(busy_cycles * PMU_BUSY_CYCLES_NORM_MAX
+                              / total_cycles);
+        }
+
+exit:
+        gk20a_idle_nosuspend(g);
+
+        return 0;
+}
+
 void nvgpu_pmu_get_load_counters(struct gk20a *g, u32 *busy_cycles,
                                  u32 *total_cycles)
 {