[RFC v2 10/10] eventdev: remove single event enqueue and dequeue

["Mattias Rönnblom" <mattias.ronnblom@ericsson.com>]

Remove the single event enqueue and dequeue, since they did not
provide any noticable performance benefits.

This is a change of the ABI, previously announced as a deprecation
notice. These functions were not directly called by the application,
so the API remains unaffected.

Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
---
 doc/guides/rel_notes/deprecation.rst |  6 +-----
 lib/eventdev/eventdev_pmd.h          |  4 ----
 lib/eventdev/eventdev_private.c      | 22 ----------------------
 lib/eventdev/rte_eventdev.h          | 21 ++++-----------------
 lib/eventdev/rte_eventdev_core.h     |  4 ----
 5 files changed, 5 insertions(+), 52 deletions(-)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 7bc2310bc4..6a6fd54444 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -173,11 +173,7 @@ Deprecation Notices
 
 * eventdev: The single-event (non-burst) enqueue and dequeue operations,
   used by static inline burst enqueue and dequeue functions in ``rte_eventdev.h``,
-  will be removed in DPDK 23.11.
-  This simplification includes changing the layout and potentially also
-  the size of the public ``rte_event_fp_ops`` struct, breaking the ABI.
-  Since these functions are not called directly by the application,
-  the API remains unaffected.
+  are removed in DPDK 24.11.
 
 * pipeline: The pipeline library legacy API (functions rte_pipeline_*)
   will be deprecated and subsequently removed in DPDK 24.11 release.
diff --git a/lib/eventdev/eventdev_pmd.h b/lib/eventdev/eventdev_pmd.h
index af855e3467..36148f8d86 100644
--- a/lib/eventdev/eventdev_pmd.h
+++ b/lib/eventdev/eventdev_pmd.h
@@ -158,16 +158,12 @@ struct __rte_cache_aligned rte_eventdev {
 	uint8_t attached : 1;
 	/**< Flag indicating the device is attached */
 
-	event_enqueue_t enqueue;
-	/**< Pointer to PMD enqueue function. */
 	event_enqueue_burst_t enqueue_burst;
 	/**< Pointer to PMD enqueue burst function. */
 	event_enqueue_burst_t enqueue_new_burst;
 	/**< Pointer to PMD enqueue burst function(op new variant) */
 	event_enqueue_burst_t enqueue_forward_burst;
 	/**< Pointer to PMD enqueue burst function(op forward variant) */
-	event_dequeue_t dequeue;
-	/**< Pointer to PMD dequeue function. */
 	event_dequeue_burst_t dequeue_burst;
 	/**< Pointer to PMD dequeue burst function. */
 	event_maintain_t maintain;
diff --git a/lib/eventdev/eventdev_private.c b/lib/eventdev/eventdev_private.c
index b628f4a69e..6df129fc2d 100644
--- a/lib/eventdev/eventdev_private.c
+++ b/lib/eventdev/eventdev_private.c
@@ -5,15 +5,6 @@
 #include "eventdev_pmd.h"
 #include "rte_eventdev.h"
 
-static uint16_t
-dummy_event_enqueue(__rte_unused void *port,
-		    __rte_unused const struct rte_event *ev)
-{
-	RTE_EDEV_LOG_ERR(
-		"event enqueue requested for unconfigured event device");
-	return 0;
-}
-
 static uint16_t
 dummy_event_enqueue_burst(__rte_unused void *port,
 			  __rte_unused const struct rte_event ev[],
@@ -24,15 +15,6 @@ dummy_event_enqueue_burst(__rte_unused void *port,
 	return 0;
 }
 
-static uint16_t
-dummy_event_dequeue(__rte_unused void *port, __rte_unused struct rte_event *ev,
-		    __rte_unused uint64_t timeout_ticks)
-{
-	RTE_EDEV_LOG_ERR(
-		"event dequeue requested for unconfigured event device");
-	return 0;
-}
-
 static uint16_t
 dummy_event_dequeue_burst(__rte_unused void *port,
 			  __rte_unused struct rte_event ev[],
@@ -129,11 +111,9 @@ event_dev_fp_ops_reset(struct rte_event_fp_ops *fp_op)
 {
 	static void *dummy_data[RTE_MAX_QUEUES_PER_PORT];
 	static const struct rte_event_fp_ops dummy = {
-		.enqueue = dummy_event_enqueue,
 		.enqueue_burst = dummy_event_enqueue_burst,
 		.enqueue_new_burst = dummy_event_enqueue_burst,
 		.enqueue_forward_burst = dummy_event_enqueue_burst,
-		.dequeue = dummy_event_dequeue,
 		.dequeue_burst = dummy_event_dequeue_burst,
 		.maintain = dummy_event_maintain,
 		.txa_enqueue = dummy_event_tx_adapter_enqueue,
@@ -153,11 +133,9 @@ void
 event_dev_fp_ops_set(struct rte_event_fp_ops *fp_op,
 		     const struct rte_eventdev *dev)
 {
-	fp_op->enqueue = dev->enqueue;
 	fp_op->enqueue_burst = dev->enqueue_burst;
 	fp_op->enqueue_new_burst = dev->enqueue_new_burst;
 	fp_op->enqueue_forward_burst = dev->enqueue_forward_burst;
-	fp_op->dequeue = dev->dequeue;
 	fp_op->dequeue_burst = dev->dequeue_burst;
 	fp_op->maintain = dev->maintain;
 	fp_op->txa_enqueue = dev->txa_enqueue;
diff --git a/lib/eventdev/rte_eventdev.h b/lib/eventdev/rte_eventdev.h
index b5c3c16dd0..fabd1490db 100644
--- a/lib/eventdev/rte_eventdev.h
+++ b/lib/eventdev/rte_eventdev.h
@@ -2596,14 +2596,8 @@ __rte_event_enqueue_burst(uint8_t dev_id, uint8_t port_id,
 	}
 #endif
 	rte_eventdev_trace_enq_burst(dev_id, port_id, ev, nb_events, (void *)fn);
-	/*
-	 * Allow zero cost non burst mode routine invocation if application
-	 * requests nb_events as const one
-	 */
-	if (nb_events == 1)
-		return (fp_ops->enqueue)(port, ev);
-	else
-		return fn(port, ev, nb_events);
+
+	return fn(port, ev, nb_events);
 }
 
 /**
@@ -2852,15 +2846,8 @@ rte_event_dequeue_burst(uint8_t dev_id, uint8_t port_id, struct rte_event ev[],
 	}
 #endif
 	rte_eventdev_trace_deq_burst(dev_id, port_id, ev, nb_events);
-	/*
-	 * Allow zero cost non burst mode routine invocation if application
-	 * requests nb_events as const one
-	 */
-	if (nb_events == 1)
-		return (fp_ops->dequeue)(port, ev, timeout_ticks);
-	else
-		return (fp_ops->dequeue_burst)(port, ev, nb_events,
-					       timeout_ticks);
+
+	return (fp_ops->dequeue_burst)(port, ev, nb_events, timeout_ticks);
 }
 
 #define RTE_EVENT_DEV_MAINT_OP_FLUSH          (1 << 0)
diff --git a/lib/eventdev/rte_eventdev_core.h b/lib/eventdev/rte_eventdev_core.h
index 2706d5e6c8..78b06d1f2e 100644
--- a/lib/eventdev/rte_eventdev_core.h
+++ b/lib/eventdev/rte_eventdev_core.h
@@ -60,16 +60,12 @@ typedef void (*event_preschedule_t)(void *port,
 struct __rte_cache_aligned rte_event_fp_ops {
 	void **data;
 	/**< points to array of internal port data pointers */
-	event_enqueue_t enqueue;
-	/**< PMD enqueue function. */
 	event_enqueue_burst_t enqueue_burst;
 	/**< PMD enqueue burst function. */
 	event_enqueue_burst_t enqueue_new_burst;
 	/**< PMD enqueue burst new function. */
 	event_enqueue_burst_t enqueue_forward_burst;
 	/**< PMD enqueue burst fwd function. */
-	event_dequeue_t dequeue;
-	/**< PMD dequeue function. */
 	event_dequeue_burst_t dequeue_burst;
 	/**< PMD dequeue burst function. */
 	event_maintain_t maintain;
-- 
2.43.0