[PATCH v3 4/9] examples/vm_power_mgr: add scale to medium freq fn

[David Hunt <david.hunt@intel.com>]

Signed-off-by: Nemanja Marjanovic <nemanja.marjanovic@intel.com>
Signed-off-by: Rory Sexton <rory.sexton@intel.com>
Signed-off-by: David Hunt <david.hunt@intel.com>
---
 examples/vm_power_manager/power_manager.c | 15 +++++++++++++++
 examples/vm_power_manager/power_manager.h | 13 +++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/examples/vm_power_manager/power_manager.c b/examples/vm_power_manager/power_manager.c
index 80705f9..c021c1d 100644
--- a/examples/vm_power_manager/power_manager.c
+++ b/examples/vm_power_manager/power_manager.c
@@ -286,3 +286,18 @@ power_manager_disable_turbo_core(unsigned int core_num)
 	POWER_SCALE_CORE(disable_turbo, core_num, ret);
 	return ret;
 }
+
+int
+power_manager_scale_core_med(unsigned int core_num)
+{
+	int ret = 0;
+
+	if (core_num >= POWER_MGR_MAX_CPUS)
+		return -1;
+	if (!(global_enabled_cpus & (1ULL << core_num)))
+		return -1;
+	rte_spinlock_lock(&global_core_freq_info[core_num].power_sl);
+	ret = rte_power_set_freq(core_num, 5);
+	rte_spinlock_unlock(&global_core_freq_info[core_num].power_sl);
+	return ret;
+}
diff --git a/examples/vm_power_manager/power_manager.h b/examples/vm_power_manager/power_manager.h
index b74d09b..b52fb4c 100644
--- a/examples/vm_power_manager/power_manager.h
+++ b/examples/vm_power_manager/power_manager.h
@@ -231,6 +231,19 @@ int power_manager_disable_turbo_core(unsigned int core_num);
  */
 uint32_t power_manager_get_current_frequency(unsigned core_num);
 
+/**
+ * Scale to medium frequency for the core specified by core_num.
+ * It is thread-safe.
+ *
+ * @param core_num
+ *  The core number to change frequency
+ *
+ * @return
+ *  - 1 on success.
+ *  - 0 if frequency not changed.
+ *  - Negative on error.
+ */
+int power_manager_scale_core_med(unsigned int core_num);
 
 #ifdef __cplusplus
 }
-- 
2.7.4