[dpdk-dev] [PATCH v6 09/23] eventtimer: add API to get service id

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

When the event timer adapter uses a software implementation, timer
management is performed on a service core using a service registered at
the time of adapter creation.  This commit adds a helper function to get
the service id that can be used by an application to assign an lcore for
the service to run on.

Signed-off-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
---
 lib/librte_eventdev/rte_event_timer_adapter.c     | 20 ++++++++++++++++++++
 lib/librte_eventdev/rte_event_timer_adapter.h     | 19 +++++++++++++++++++
 lib/librte_eventdev/rte_event_timer_adapter_pmd.h |  4 ++++
 lib/librte_eventdev/rte_eventdev_version.map      |  1 +
 4 files changed, 44 insertions(+)

diff --git a/lib/librte_eventdev/rte_event_timer_adapter.c b/lib/librte_eventdev/rte_event_timer_adapter.c
index 27e6226..68748be 100644
--- a/lib/librte_eventdev/rte_event_timer_adapter.c
+++ b/lib/librte_eventdev/rte_event_timer_adapter.c
@@ -378,6 +378,23 @@ rte_event_timer_adapter_free(struct rte_event_timer_adapter *adapter)
 }
 
 int
+rte_event_timer_adapter_service_id_get(struct rte_event_timer_adapter *adapter,
+				       uint32_t *service_id)
+{
+	ADAPTER_VALID_OR_ERR_RET(adapter, -EINVAL);
+
+	if (service_id == NULL)
+		return -EINVAL;
+
+	if (adapter->data->service_inited) {
+		*service_id = adapter->data->service_id;
+		return 0;
+	}
+
+	return -ESRCH;
+}
+
+int
 rte_event_timer_arm_burst(const struct rte_event_timer_adapter *adapter,
 			  struct rte_event_timer **evtims,
 			  uint16_t nb_evtims)
@@ -521,6 +538,9 @@ sw_event_timer_adapter_init(struct rte_event_timer_adapter *adapter)
 	if (ret < 0)
 		return ret;
 
+	adapter->data->service_id = sw_data->service_id;
+	adapter->data->service_inited = 1;
+
 	return 0;
 }
 
diff --git a/lib/librte_eventdev/rte_event_timer_adapter.h b/lib/librte_eventdev/rte_event_timer_adapter.h
index d1e4d18..84d3c39 100644
--- a/lib/librte_eventdev/rte_event_timer_adapter.h
+++ b/lib/librte_eventdev/rte_event_timer_adapter.h
@@ -402,6 +402,25 @@ struct rte_event_timer_adapter *rte_event_timer_adapter_lookup(
 int rte_event_timer_adapter_free(struct rte_event_timer_adapter *adapter);
 
 /**
+ * Retrieve the service ID of the event timer adapter. If the adapter doesn't
+ * use an rte_service function, this function returns -ESRCH.
+ *
+ * @param adapter
+ *   A pointer to an event timer adapter.
+ *
+ * @param [out] service_id
+ *   A pointer to a uint32_t, to be filled in with the service id.
+ *
+ * @return
+ *   - 0: Success
+ *   - <0: Error code on failure, if the event dev doesn't use a rte_service
+ *   function, this function returns -ESRCH.
+ */
+int
+rte_event_timer_adapter_service_id_get(struct rte_event_timer_adapter *adapter,
+				       uint32_t *service_id);
+
+/**
  * @warning
  * @b EXPERIMENTAL: this structure may change without prior notice
  *
diff --git a/lib/librte_eventdev/rte_event_timer_adapter_pmd.h b/lib/librte_eventdev/rte_event_timer_adapter_pmd.h
index 485fad1..6c65c36 100644
--- a/lib/librte_eventdev/rte_event_timer_adapter_pmd.h
+++ b/lib/librte_eventdev/rte_event_timer_adapter_pmd.h
@@ -125,6 +125,10 @@ struct rte_event_timer_adapter_data {
 	/**< Adapter capabilities */
 	void *adapter_priv;
 	/**< Timer adapter private data*/
+	uint8_t service_inited;
+	/**< Service initialization state */
+	uint32_t service_id;
+	/**< Service ID*/
 
 	RTE_STD_C11
 	uint8_t started : 1;
diff --git a/lib/librte_eventdev/rte_eventdev_version.map b/lib/librte_eventdev/rte_eventdev_version.map
index f56ca0f..a35a668 100644
--- a/lib/librte_eventdev/rte_eventdev_version.map
+++ b/lib/librte_eventdev/rte_eventdev_version.map
@@ -75,6 +75,7 @@ DPDK_18.02 {
 	rte_event_timer_adapter_create_ext;
 	rte_event_timer_adapter_free;
 	rte_event_timer_adapter_get_info;
+	rte_event_timer_adapter_service_id_get;
 	rte_event_timer_adapter_start;
 	rte_event_timer_adapter_stop;
 	rte_event_timer_arm_burst;
-- 
2.6.4