api: schedule: add scheduler config and start API

Add API calls to configure and start scheduler subsystem.

Signed-off-by: Dmitry Eremin-Solenikov <dmitry.ereminsolenikov@linaro.org>
Signed-off-by: Balasubramanian Manoharan <bala.manoharan@linaro.org>
Reviewed-by: Bill Fischofer <bill.fischofer@linaro.org>
Reviewed-by: Petri Savolainen <petri.savolainen@linaro.org>
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>

include/odp/api/spec/schedule.h

@@ -257,6 +257,44 @@ int odp_schedule_default_prio(void);
  */
 int odp_schedule_num_prio(void);
 
+/**
+ * Initialize schedule configuration options
+ *
+ * Initialize an odp_schedule_config_t to its default values.
+ *
+ * @param[out] config  Pointer to schedule configuration structure
+ */
+void odp_schedule_config_init(odp_schedule_config_t *config);
+
+/**
+ * Global schedule configuration
+ *
+ * Initialize and configure scheduler with global configuration options
+ * to schedule events across different scheduled queues.
+ * This function must be called before scheduler is used (any other scheduler
+ * function is called except odp_schedule_capability() and
+ * odp_schedule_config_init()) or any queues are created (by application itself
+ * or by other ODP modules).
+ * An application can pass NULL value to use default configuration. It will
+ * have the same result as filling the structure with
+ * odp_schedule_config_init() and then passing it to odp_schedule_config().
+ *
+ * The initialization sequeunce should be,
+ * odp_schedule_capability()
+ * odp_schedule_config_init()
+ * odp_schedule_config()
+ * odp_schedule()
+ *
+ * @param config   Pointer to scheduler configuration structure or NULL for the
+ *                 default configuration
+ *
+ * @retval 0 on success
+ * @retval <0 on failure
+ *
+ * @see odp_schedule_capability(), odp_schedule_config_init()
+ */
+int odp_schedule_config(const odp_schedule_config_t *config);
+
 /**
  * Query scheduler capabilities
  *

include/odp/api/spec/schedule_types.h

@@ -200,6 +200,25 @@ typedef struct odp_schedule_capability_t {
 
 } odp_schedule_capability_t;
 
+/**
+ * Schedule configuration
+ */
+typedef struct odp_schedule_config_t {
+	/** Maximum number of scheduled queues to be supported.
+	 *
+	 * @see odp_schedule_capability_t
+	 */
+	uint32_t num_queues;
+
+	/** Maximum number of events required to be stored simultaneously in
+	 * scheduled queue. This number must not exceed 'max_queue_size'
+	 * capability.  A value of 0 configures default queue size supported by
+	 * the implementation.
+	 */
+	uint32_t queue_size;
+
+} odp_schedule_config_t;
+
 /**
  * @}
  */