[dpdk-dev] [PATCH v6 03/23] eventtimer: add default software driver stub

[Erik Gabriel Carrillo <erik.g.carrillo@intel.com>]

If an eventdev PMD does not wish to provide event timer adapter ops
definitions, the library will fall back to a default software
implementation whose entry points are added by this commit.

Signed-off-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
---
 lib/librte_eventdev/rte_event_timer_adapter.c | 107 ++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)

diff --git a/lib/librte_eventdev/rte_event_timer_adapter.c b/lib/librte_eventdev/rte_event_timer_adapter.c
index 3e58db4..540be95 100644
--- a/lib/librte_eventdev/rte_event_timer_adapter.c
+++ b/lib/librte_eventdev/rte_event_timer_adapter.c
@@ -48,6 +48,8 @@
 
 static struct rte_event_timer_adapter adapters[MAX_EVENT_TIMER_ADAPTERS];
 
+const struct rte_event_timer_adapter_ops sw_event_adapter_timer_ops;
+
 static inline int
 adapter_valid(const struct rte_event_timer_adapter *adapter)
 {
@@ -211,6 +213,12 @@ rte_event_timer_adapter_create_ext(
 		}
 	}
 
+	/* If eventdev PMD did not provide ops, use default software
+	 * implementation.
+	 */
+	if (adapter->ops == NULL)
+		adapter->ops = &sw_event_adapter_timer_ops;
+
 	/* Allow driver to do some setup */
 	FUNC_PTR_OR_NULL_RET_WITH_ERRNO(adapter->ops->init, -ENOTSUP);
 	ret = adapter->ops->init(adapter);
@@ -318,6 +326,12 @@ rte_event_timer_adapter_lookup(uint16_t adapter_id)
 		return NULL;
 	}
 
+	/* If eventdev PMD did not provide ops, use default software
+	 * implementation.
+	 */
+	if (adapter->ops == NULL)
+		adapter->ops = &sw_event_adapter_timer_ops;
+
 	/* Set fast-path function pointers */
 	adapter->arm_burst = adapter->ops->arm_burst;
 	adapter->arm_tmo_tick_burst = adapter->ops->arm_tmo_tick_burst;
@@ -393,3 +407,96 @@ rte_event_timer_cancel_burst(const struct rte_event_timer_adapter *adapter,
 
 	return adapter->cancel_burst(adapter, evtims, nb_evtims);
 }
+
+/*
+ * Software event timer adapter ops definitions
+ */
+
+static int
+sw_event_timer_adapter_init(struct rte_event_timer_adapter *adapter)
+{
+	RTE_SET_USED(adapter);
+
+	return 0;
+}
+
+static int
+sw_event_timer_adapter_uninit(struct rte_event_timer_adapter *adapter)
+{
+	RTE_SET_USED(adapter);
+
+	return 0;
+}
+
+static int
+sw_event_timer_adapter_start(const struct rte_event_timer_adapter *adapter)
+{
+	RTE_SET_USED(adapter);
+
+	return 0;
+}
+
+static int
+sw_event_timer_adapter_stop(const struct rte_event_timer_adapter *adapter)
+{
+	RTE_SET_USED(adapter);
+
+	return 0;
+}
+
+static void
+sw_event_timer_adapter_get_info(const struct rte_event_timer_adapter *adapter,
+			struct rte_event_timer_adapter_info *adapter_info)
+{
+	RTE_SET_USED(adapter);
+	RTE_SET_USED(adapter_info);
+}
+
+static int
+sw_event_timer_arm_burst(const struct rte_event_timer_adapter *adapter,
+			 struct rte_event_timer **evtims,
+			 uint16_t nb_evtims)
+{
+	RTE_SET_USED(adapter);
+	RTE_SET_USED(evtims);
+	RTE_SET_USED(nb_evtims);
+
+	return 0;
+}
+
+static int
+sw_event_timer_cancel_burst(const struct rte_event_timer_adapter *adapter,
+			    struct rte_event_timer **evtims,
+			    uint16_t nb_evtims)
+{
+	RTE_SET_USED(adapter);
+	RTE_SET_USED(evtims);
+	RTE_SET_USED(nb_evtims);
+
+	return 0;
+}
+
+static int
+sw_event_timer_arm_tmo_tick_burst(const struct rte_event_timer_adapter *adapter,
+				  struct rte_event_timer **tims,
+				  uint64_t timeout_tick,
+				  uint16_t nb_tims)
+{
+	RTE_SET_USED(adapter);
+	RTE_SET_USED(tims);
+	RTE_SET_USED(timeout_tick);
+	RTE_SET_USED(nb_tims);
+
+	return 0;
+}
+
+const struct rte_event_timer_adapter_ops sw_event_adapter_timer_ops = {
+	.init = sw_event_timer_adapter_init,
+	.uninit = sw_event_timer_adapter_uninit,
+	.start = sw_event_timer_adapter_start,
+	.stop = sw_event_timer_adapter_stop,
+	.get_info = sw_event_timer_adapter_get_info,
+	.arm_burst = sw_event_timer_arm_burst,
+	.arm_tmo_tick_burst = sw_event_timer_arm_tmo_tick_burst,
+	.cancel_burst = sw_event_timer_cancel_burst,
+};
-- 
2.6.4