eventdev: add Tx flag for packets with same destination

This patch introduces a `flag` in the Eth TX adapter enqueue API.
Some drivers may support burst functionality only with the packets
having same destination device and queue.

The flag `RTE_EVENT_ETH_TX_ADAPTER_ENQUEUE_SAME_DEST` can be used
to indicate this so the underlying driver, for drivers to utilize
burst functionality appropriately.

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>

11 files changed, 45 insertions, 10 deletions

diff --git a/app/test-eventdev/test_pipeline_common.h b/app/test-eventdev/test_pipeline_common.h
index 0440b9e29c..6e73c6ab26 100644
--- a/app/test-eventdev/test_pipeline_common.h
+++ b/app/test-eventdev/test_pipeline_common.h
@@ -106,7 +106,7 @@ pipeline_event_tx(const uint8_t dev, const uint8_t port,
 		struct rte_event * const ev)
 {
 	rte_event_eth_tx_adapter_txq_set(ev->mbuf, 0);
-	while (!rte_event_eth_tx_adapter_enqueue(dev, port, ev, 1))
+	while (!rte_event_eth_tx_adapter_enqueue(dev, port, ev, 1, 0))
 		rte_pause();
 }
 
@@ -116,10 +116,10 @@ pipeline_event_tx_burst(const uint8_t dev, const uint8_t port,
 {
 	uint16_t enq;
 
-	enq = rte_event_eth_tx_adapter_enqueue(dev, port, ev, nb_rx);
+	enq = rte_event_eth_tx_adapter_enqueue(dev, port, ev, nb_rx, 0);
 	while (enq < nb_rx) {
 		enq += rte_event_eth_tx_adapter_enqueue(dev, port,
-				ev + enq, nb_rx - enq);
+				ev + enq, nb_rx - enq, 0);
 	}
 }
 
diff --git a/doc/guides/prog_guide/event_ethernet_tx_adapter.rst b/doc/guides/prog_guide/event_ethernet_tx_adapter.rst
index 192f9e1cf9..a8c13e1366 100644
--- a/doc/guides/prog_guide/event_ethernet_tx_adapter.rst
+++ b/doc/guides/prog_guide/event_ethernet_tx_adapter.rst
@@ -137,11 +137,12 @@ should use the ``rte_event_enqueue_burst()`` function.
 	if (cap & RTE_EVENT_ETH_TX_ADAPTER_CAP_INTERNAL_PORT) {
 
 		event.mbuf = m;
+		eq_flags = 0;
 
 		m->port = tx_port;
 		rte_event_eth_tx_adapter_txq_set(m, tx_queue_id);
 
-		rte_event_eth_tx_adapter_enqueue(dev_id, ev_port, &event, 1);
+		rte_event_eth_tx_adapter_enqueue(dev_id, ev_port, &event, 1, eq_flags);
 	} else {
 
 		event.queue_id = qid; /* event queue linked to adapter port */
diff --git a/doc/guides/rel_notes/release_19_11.rst b/doc/guides/rel_notes/release_19_11.rst
index 40121b9aa9..856088c5c7 100644
--- a/doc/guides/rel_notes/release_19_11.rst
+++ b/doc/guides/rel_notes/release_19_11.rst
@@ -186,6 +186,11 @@ API Changes
 * ethdev: changed ``rte_eth_dev_owner_delete`` return value from ``void`` to
   ``int`` to provide a way to report various error conditions.
 
+* event: The function ``rte_event_eth_tx_adapter_enqueue`` takes an additional
+  input as ``flags``. Flag ``RTE_EVENT_ETH_TX_ADAPTER_ENQUEUE_SAME_DEST`` which
+  has been introduced in this release is used when used when all the packets
+  enqueued in the tx adapter are destined for the same Ethernet port & Tx queue.
+
 
 ABI Changes
 -----------
@@ -238,7 +243,7 @@ The libraries prepended with a plus sign were incremented in this version.
      librte_eal.so.11
      librte_efd.so.1
    + librte_ethdev.so.13
-     librte_eventdev.so.7
+   + librte_eventdev.so.8
      librte_flow_classify.so.1
      librte_gro.so.1
      librte_gso.so.1
diff --git a/drivers/event/octeontx/ssovf_evdev.c b/drivers/event/octeontx/ssovf_evdev.c
index a273d4c96b..e4e7c44ed8 100644
--- a/drivers/event/octeontx/ssovf_evdev.c
+++ b/drivers/event/octeontx/ssovf_evdev.c
@@ -147,6 +147,7 @@ ssovf_fastpath_fns_set(struct rte_eventdev *dev)
 	dev->dequeue       = ssows_deq;
 	dev->dequeue_burst = ssows_deq_burst;
 	dev->txa_enqueue = sso_event_tx_adapter_enqueue;
+	dev->txa_enqueue_same_dest = dev->txa_enqueue;
 
 	if (edev->is_timeout_deq) {
 		dev->dequeue       = ssows_deq_timeout;
diff --git a/drivers/event/octeontx2/otx2_evdev.c b/drivers/event/octeontx2/otx2_evdev.c
index 4d8860fc36..2daeba42c7 100644
--- a/drivers/event/octeontx2/otx2_evdev.c
+++ b/drivers/event/octeontx2/otx2_evdev.c
@@ -434,6 +434,8 @@ SSO_TX_ADPTR_ENQ_FASTPATH_FUNC
 						NIX_TX_OFFLOAD_L3_L4_CSUM_F)];
 		}
 	}
+
+	event_dev->txa_enqueue_same_dest = event_dev->txa_enqueue;
 	rte_mb();
 }
 
diff --git a/examples/eventdev_pipeline/pipeline_worker_tx.c b/examples/eventdev_pipeline/pipeline_worker_tx.c
index 8961cd656d..a0f40c27c6 100644
--- a/examples/eventdev_pipeline/pipeline_worker_tx.c
+++ b/examples/eventdev_pipeline/pipeline_worker_tx.c
@@ -40,7 +40,7 @@ worker_tx_pkt(const uint8_t dev, const uint8_t port, struct rte_event *ev)
 {
 	exchange_mac(ev->mbuf);
 	rte_event_eth_tx_adapter_txq_set(ev->mbuf, 0);
-	while (!rte_event_eth_tx_adapter_enqueue(dev, port, ev, 1))
+	while (!rte_event_eth_tx_adapter_enqueue(dev, port, ev, 1, 0))
 		rte_pause();
 }
 
diff --git a/lib/librte_eventdev/Makefile b/lib/librte_eventdev/Makefile
index cd3ff80408..9e6a99aa15 100644
--- a/lib/librte_eventdev/Makefile
+++ b/lib/librte_eventdev/Makefile
@@ -8,7 +8,7 @@ include $(RTE_SDK)/mk/rte.vars.mk
 LIB = librte_eventdev.a
 
 # library version
-LIBABIVER := 7
+LIBABIVER := 8
 
 # build flags
 CFLAGS += -DALLOW_EXPERIMENTAL_API
diff --git a/lib/librte_eventdev/meson.build b/lib/librte_eventdev/meson.build
index 19541f23f4..9ba6c0393b 100644
--- a/lib/librte_eventdev/meson.build
+++ b/lib/librte_eventdev/meson.build
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
-version = 7
+version = 8
 allow_experimental_apis = true
 
 if is_linux
diff --git a/lib/librte_eventdev/rte_event_eth_tx_adapter.h b/lib/librte_eventdev/rte_event_eth_tx_adapter.h
index c848261c40..93b717af9f 100644
--- a/lib/librte_eventdev/rte_event_eth_tx_adapter.h
+++ b/lib/librte_eventdev/rte_event_eth_tx_adapter.h
@@ -300,6 +300,11 @@ rte_event_eth_tx_adapter_txq_get(struct rte_mbuf *pkt)
 int
 rte_event_eth_tx_adapter_event_port_get(uint8_t id, uint8_t *event_port_id);
 
+#define RTE_EVENT_ETH_TX_ADAPTER_ENQUEUE_SAME_DEST	0x1
+/**< This flag is used when all the packets enqueued in the tx adapter are
+ * destined for the same Ethernet port & Tx queue.
+ */
+
 /**
  * Enqueue a burst of events objects or an event object supplied in *rte_event*
  * structure on an  event device designated by its *dev_id* through the event
@@ -324,6 +329,10 @@ rte_event_eth_tx_adapter_event_port_get(uint8_t id, uint8_t *event_port_id);
  *  The number of event objects to enqueue, typically number of
  *  rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...)
  *  available for this port.
+ * @param flags
+ *  RTE_EVENT_ETH_TX_ADAPTER_ENQUEUE_ flags.
+ *  #RTE_EVENT_ETH_TX_ADAPTER_ENQUEUE_SAME_DEST signifies that all the packets
+ *  which are enqueued are destined for the same Ethernet port & Tx queue.
  *
  * @return
  *   The number of event objects actually enqueued on the event device. The
@@ -343,7 +352,8 @@ static inline uint16_t
 rte_event_eth_tx_adapter_enqueue(uint8_t dev_id,
 				uint8_t port_id,
 				struct rte_event ev[],
-				uint16_t nb_events)
+				uint16_t nb_events,
+				const uint8_t flags)
 {
 	const struct rte_eventdev *dev = &rte_eventdevs[dev_id];
 
@@ -359,7 +369,12 @@ rte_event_eth_tx_adapter_enqueue(uint8_t dev_id,
 		return 0;
 	}
 #endif
-	return dev->txa_enqueue(dev->data->ports[port_id], ev, nb_events);
+	if (flags)
+		return dev->txa_enqueue_same_dest(dev->data->ports[port_id],
+						  ev, nb_events);
+	else
+		return dev->txa_enqueue(dev->data->ports[port_id], ev,
+					nb_events);
 }
 
 /**
diff --git a/lib/librte_eventdev/rte_eventdev.c b/lib/librte_eventdev/rte_eventdev.c
index f44c869cb2..b987e07454 100644
--- a/lib/librte_eventdev/rte_eventdev.c
+++ b/lib/librte_eventdev/rte_eventdev.c
@@ -1351,6 +1351,7 @@ rte_event_pmd_allocate(const char *name, int socket_id)
 	eventdev = &rte_eventdevs[dev_id];
 
 	eventdev->txa_enqueue = rte_event_tx_adapter_enqueue;
+	eventdev->txa_enqueue_same_dest = rte_event_tx_adapter_enqueue;
 
 	if (eventdev->data == NULL) {
 		struct rte_eventdev_data *eventdev_data = NULL;
diff --git a/lib/librte_eventdev/rte_eventdev.h b/lib/librte_eventdev/rte_eventdev.h
index 5044a13d05..ced6f29d98 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -1230,6 +1230,12 @@ typedef uint16_t (*event_tx_adapter_enqueue)(void *port,
 				struct rte_event ev[], uint16_t nb_events);
 /**< @internal Enqueue burst of events on port of a device */
 
+typedef uint16_t (*event_tx_adapter_enqueue_same_dest)(void *port,
+		struct rte_event ev[], uint16_t nb_events);
+/**< @internal Enqueue burst of events on port of a device supporting
+ * burst having same destination Ethernet port & Tx queue.
+ */
+
 #define RTE_EVENTDEV_NAME_MAX_LEN	(64)
 /**< @internal Max length of name of event PMD */
 
@@ -1292,6 +1298,10 @@ struct rte_eventdev {
 	/**< Pointer to PMD dequeue function. */
 	event_dequeue_burst_t dequeue_burst;
 	/**< Pointer to PMD dequeue burst function. */
+	event_tx_adapter_enqueue_same_dest txa_enqueue_same_dest;
+	/**< Pointer to PMD eth Tx adapter burst enqueue function with
+	 * events destined to same Eth port & Tx queue.
+	 */
 	event_tx_adapter_enqueue txa_enqueue;
 	/**< Pointer to PMD eth Tx adapter enqueue function. */
 	struct rte_eventdev_data *data;