From: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Date: Wed, 25 Oct 2017 14:50:27 +0000 (+0530)
Subject: eventdev: add API to get service id
X-Git-Tag: spdx-start~1046
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=6325c62dca399d664f4af5b2b428dc291c98424d;p=dpdk.git

eventdev: add API to get service id

In case of sw event device the scheduling can be done on a service core
using the service registered at the time of probe.
This patch adds a helper function to get the service id that can be used
by the application to assign a lcore for the service to run on.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>
---

diff --git a/lib/librte_eventdev/rte_eventdev.c b/lib/librte_eventdev/rte_eventdev.c
index 250bfc8dc9..ce6a5dc12b 100644
--- a/lib/librte_eventdev/rte_eventdev.c
+++ b/lib/librte_eventdev/rte_eventdev.c
@@ -962,6 +962,23 @@ rte_event_dequeue_timeout_ticks(uint8_t dev_id, uint64_t ns,
 	return (*dev->dev_ops->timeout_ticks)(dev, ns, timeout_ticks);
 }
 
+int
+rte_event_dev_service_id_get(uint8_t dev_id, uint32_t *service_id)
+{
+	struct rte_eventdev *dev;
+
+	RTE_EVENTDEV_VALID_DEVID_OR_ERR_RET(dev_id, -EINVAL);
+	dev = &rte_eventdevs[dev_id];
+
+	if (service_id == NULL)
+		return -EINVAL;
+
+	if (dev->data->service_inited)
+		*service_id = dev->data->service_id;
+
+	return dev->data->service_inited ? 0 : -ESRCH;
+}
+
 int
 rte_event_dev_dump(uint8_t dev_id, FILE *f)
 {
diff --git a/lib/librte_eventdev/rte_eventdev.h b/lib/librte_eventdev/rte_eventdev.h
index b9d1b986be..a7973a93c2 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -1103,6 +1103,10 @@ struct rte_eventdev_data {
 	/**< Event device capabilities(RTE_EVENT_DEV_CAP_)*/
 	struct rte_event_dev_config dev_conf;
 	/**< Configuration applied to device. */
+	uint8_t service_inited;
+	/* Service initialization state */
+	uint32_t service_id;
+	/* Service ID*/
 
 	RTE_STD_C11
 	uint8_t dev_started : 1;
@@ -1605,6 +1609,24 @@ int
 rte_event_port_links_get(uint8_t dev_id, uint8_t port_id,
 			 uint8_t queues[], uint8_t priorities[]);
 
+/**
+ * Retrieve the service ID of the event dev. If the adapter doesn't use
+ * a rte_service function, this function returns -ESRCH.
+ *
+ * @param dev_id
+ *   The identifier of the device.
+ *
+ * @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_dev_service_id_get(uint8_t dev_id, uint32_t *service_id);
+
 /**
  * Dump internal information about *dev_id* to the FILE* provided in *f*.
  *
diff --git a/lib/librte_eventdev/rte_eventdev_version.map b/lib/librte_eventdev/rte_eventdev_version.map
index 800ca6e926..108ae61fb8 100644
--- a/lib/librte_eventdev/rte_eventdev_version.map
+++ b/lib/librte_eventdev/rte_eventdev_version.map
@@ -51,6 +51,7 @@ DPDK_17.11 {
 	global:
 
 	rte_event_dev_attr_get;
+	rte_event_dev_service_id_get;
 	rte_event_port_attr_get;
 	rte_event_queue_attr_get;