[dpdk-dev] [PATCH v4 19/22] event/dlb: add PMD self-tests

[Timothy McDaniel <timothy.mcdaniel@intel.com>]

Add a variety of self-tests for both ldb and directed
ports/queues, as well as configure, start, stop, link, etc...

Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
---
 app/test/test_eventdev.c         |    8 +
 drivers/event/dlb/dlb.c          |    1 +
 drivers/event/dlb/dlb_selftest.c | 1563 ++++++++++++++++++++++++++++++++++++++
 drivers/event/dlb/meson.build    |    1 +
 4 files changed, 1573 insertions(+)
 create mode 100644 drivers/event/dlb/dlb_selftest.c

diff --git a/app/test/test_eventdev.c b/app/test/test_eventdev.c
index 62019c1..2f6ad49 100644
--- a/app/test/test_eventdev.c
+++ b/app/test/test_eventdev.c
@@ -1030,6 +1030,13 @@ test_eventdev_selftest_dpaa2(void)
 	return test_eventdev_selftest_impl("event_dpaa2", "");
 }
 
+static int
+test_eventdev_selftest_dlb(void)
+{
+	return test_eventdev_selftest_impl("dlb_event", "");
+}
+
+
 REGISTER_TEST_COMMAND(eventdev_common_autotest, test_eventdev_common);
 REGISTER_TEST_COMMAND(eventdev_selftest_sw, test_eventdev_selftest_sw);
 REGISTER_TEST_COMMAND(eventdev_selftest_octeontx,
@@ -1037,3 +1044,4 @@ REGISTER_TEST_COMMAND(eventdev_selftest_octeontx,
 REGISTER_TEST_COMMAND(eventdev_selftest_octeontx2,
 		test_eventdev_selftest_octeontx2);
 REGISTER_TEST_COMMAND(eventdev_selftest_dpaa2, test_eventdev_selftest_dpaa2);
+REGISTER_TEST_COMMAND(eventdev_selftest_dlb, test_eventdev_selftest_dlb);
diff --git a/drivers/event/dlb/dlb.c b/drivers/event/dlb/dlb.c
index 1166aa3..eabc123 100644
--- a/drivers/event/dlb/dlb.c
+++ b/drivers/event/dlb/dlb.c
@@ -3896,6 +3896,7 @@ dlb_entry_points_init(struct rte_eventdev *dev)
 		.xstats_get_names = dlb_eventdev_xstats_get_names,
 		.xstats_get_by_name = dlb_eventdev_xstats_get_by_name,
 		.xstats_reset	    = dlb_eventdev_xstats_reset,
+		.dev_selftest     = test_dlb_eventdev,
 	};
 
 	/* Expose PMD's eventdev interface */
diff --git a/drivers/event/dlb/dlb_selftest.c b/drivers/event/dlb/dlb_selftest.c
new file mode 100644
index 0000000..ebdc54c
--- /dev/null
+++ b/drivers/event/dlb/dlb_selftest.c
@@ -0,0 +1,1563 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2020 Intel Corporation
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/queue.h>
+
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_eal.h>
+#include <rte_lcore.h>
+#include <rte_debug.h>
+#include <rte_cycles.h>
+#include <rte_eventdev.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+
+#include "dlb_priv.h"
+#include "rte_pmd_dlb.h"
+
+#define MAX_PORTS 32
+#define MAX_QIDS 32
+#define DEFAULT_NUM_SEQ_NUMS 32
+
+static struct rte_mempool *eventdev_func_mempool;
+static int evdev;
+
+struct test {
+	struct rte_mempool *mbuf_pool;
+	int nb_qids;
+};
+
+/* initialization and config */
+static inline int
+init(struct test *t, int nb_queues, int nb_ports)
+{
+	struct rte_event_dev_config config = {0};
+	struct rte_event_dev_info info;
+	int ret;
+
+	memset(t, 0, sizeof(*t));
+
+	t->mbuf_pool = eventdev_func_mempool;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	config.nb_event_queues = nb_queues;
+	config.nb_event_ports = nb_ports;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0)
+		printf("%d: Error configuring device\n", __LINE__);
+
+	return ret;
+}
+
+static inline int
+create_ports(int num_ports)
+{
+	int i;
+
+	if (num_ports > MAX_PORTS)
+		return -1;
+
+	for (i = 0; i < num_ports; i++) {
+		struct rte_event_port_conf conf;
+
+		if (rte_event_port_default_conf_get(evdev, i, &conf)) {
+			printf("%d: Error querying default port conf\n",
+			       __LINE__);
+			return -1;
+		}
+
+		if (rte_event_port_setup(evdev, i, &conf) < 0) {
+			printf("%d: Error setting up port %d\n", i, __LINE__);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static inline int
+create_lb_qids(struct test *t, int num_qids, uint32_t flags)
+{
+	int i;
+
+	for (i = t->nb_qids; i < t->nb_qids + num_qids; i++) {
+		struct rte_event_queue_conf conf;
+
+		if (rte_event_queue_default_conf_get(evdev, i, &conf)) {
+			printf("%d: Error querying default queue conf\n",
+			       __LINE__);
+			return -1;
+		}
+
+		conf.schedule_type = flags;
+
+		if (conf.schedule_type == RTE_SCHED_TYPE_PARALLEL)
+			conf.nb_atomic_order_sequences = 0;
+		else
+			conf.nb_atomic_order_sequences = DEFAULT_NUM_SEQ_NUMS;
+
+		if (rte_event_queue_setup(evdev, i, &conf) < 0) {
+			printf("%d: error creating qid %d\n", __LINE__, i);
+			return -1;
+		}
+	}
+
+	t->nb_qids += num_qids;
+	if (t->nb_qids > MAX_QIDS)
+		return -1;
+
+	return 0;
+}
+
+static inline int
+create_atomic_qids(struct test *t, int num_qids)
+{
+	return create_lb_qids(t, num_qids, RTE_SCHED_TYPE_ATOMIC);
+}
+
+static inline int
+create_ordered_qids(struct test *t, int num_qids)
+{
+	return create_lb_qids(t, num_qids, RTE_SCHED_TYPE_ORDERED);
+}
+
+static inline int
+create_unordered_qids(struct test *t, int num_qids)
+{
+	return create_lb_qids(t, num_qids, RTE_SCHED_TYPE_PARALLEL);
+}
+
+/* destruction */
+static inline int
+cleanup(struct test *t __rte_unused)
+{
+	int ret;
+
+	rte_event_dev_stop(evdev);
+	ret = rte_event_dev_close(evdev);
+	if (ret)
+		return -1;
+
+	return 0;
+};
+
+static inline int
+enqueue_timeout(uint8_t port_id, struct rte_event *ev, uint64_t tmo_us)
+{
+	const uint64_t start = rte_get_timer_cycles();
+	const uint64_t ticks = (tmo_us * rte_get_timer_hz()) / 1E6;
+
+	while ((rte_get_timer_cycles() - start) < ticks) {
+		if (rte_event_enqueue_burst(evdev, port_id, ev, 1) == 1)
+			return 0;
+
+		if (rte_errno != -ENOSPC)
+			return -1;
+	}
+
+	return -1;
+}
+
+static void
+flush(uint8_t id __rte_unused, struct rte_event event, void *arg __rte_unused)
+{
+	rte_pktmbuf_free(event.mbuf);
+}
+
+static int
+test_stop_flush(struct test *t) /* test to check we can properly flush events */
+{
+	struct rte_event ev;
+	uint32_t dequeue_depth;
+	unsigned int i, count;
+	uint8_t queue_id;
+
+	ev.op = RTE_EVENT_OP_NEW;
+
+	if (init(t, 2, 1) < 0 ||
+	    create_ports(1) < 0 ||
+	    create_atomic_qids(t, 2) < 0) {
+		printf("%d: Error initializing device\n", __LINE__);
+		return -1;
+	}
+
+	if (rte_event_port_link(evdev, 0, NULL, NULL, 0) != 2) {
+		printf("%d: Error linking queues to the port\n", __LINE__);
+		goto err;
+	}
+
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: Error with start call\n", __LINE__);
+		goto err;
+	}
+
+	/* Unlink queue 1 so the PMD's stop callback has to cleanup an unlinked
+	 * queue.
+	 */
+	queue_id = 1;
+
+	if (rte_event_port_unlink(evdev, 0, &queue_id, 1) != 1) {
+		printf("%d: Error unlinking queue 1 from port\n", __LINE__);
+		goto err;
+	}
+
+	count = rte_mempool_avail_count(t->mbuf_pool);
+
+	if (rte_event_port_attr_get(evdev,
+				    0,
+				    RTE_EVENT_PORT_ATTR_DEQ_DEPTH,
+				    &dequeue_depth)) {
+		printf("%d: Error retrieveing dequeue depth\n", __LINE__);
+		goto err;
+	}
+
+	/* Send QEs to queue 0 */
+	for (i = 0; i < dequeue_depth + 1; i++) {
+		ev.mbuf = rte_pktmbuf_alloc(t->mbuf_pool);
+		ev.queue_id = 0;
+		ev.sched_type = RTE_SCHED_TYPE_ATOMIC;
+
+		if (enqueue_timeout(0, &ev, 1000)) {
+			printf("%d: Error enqueuing events\n", __LINE__);
+			goto err;
+		}
+	}
+
+	/* Send QEs to queue 1 */
+	for (i = 0; i < dequeue_depth + 1; i++) {
+		ev.mbuf = rte_pktmbuf_alloc(t->mbuf_pool);
+		ev.queue_id = 1;
+		ev.sched_type = RTE_SCHED_TYPE_ATOMIC;
+
+		if (enqueue_timeout(0, &ev, 1000)) {
+			printf("%d: Error enqueuing events\n", __LINE__);
+			goto err;
+		}
+	}
+
+	/* Now the DLB is scheduling events from the port to the IQ, and at
+	 * least one event should be remaining in each queue.
+	 */
+
+	if (rte_event_dev_stop_flush_callback_register(evdev, flush, NULL)) {
+		printf("%d: Error installing the flush callback\n", __LINE__);
+		goto err;
+	}
+
+	cleanup(t);
+
+	if (count != rte_mempool_avail_count(t->mbuf_pool)) {
+		printf("%d: Error executing the flush callback\n", __LINE__);
+		goto err;
+	}
+
+	if (rte_event_dev_stop_flush_callback_register(evdev, NULL, NULL)) {
+		printf("%d: Error uninstalling the flush callback\n", __LINE__);
+		goto err;
+	}
+
+	return 0;
+err:
+	cleanup(t);
+	return -1;
+}
+
+static int
+test_single_link(void)
+{
+	struct rte_event_dev_config config = {0};
+	struct rte_event_queue_conf queue_conf;
+	struct rte_event_port_conf port_conf;
+	struct rte_event_dev_info info;
+	uint8_t queue_id;
+	int ret;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	config.nb_event_queues = 2;
+	config.nb_event_ports = 2;
+	config.nb_single_link_event_port_queues = 1;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	/* Create a directed port */
+	if (rte_event_port_default_conf_get(evdev, 0, &port_conf)) {
+		printf("%d: Error querying default port conf\n", __LINE__);
+		goto err;
+	}
+
+	port_conf.event_port_cfg = RTE_EVENT_PORT_CFG_SINGLE_LINK;
+
+	if (rte_event_port_setup(evdev, 0, &port_conf) < 0) {
+		printf("%d: port 0 setup expected to succeed\n", __LINE__);
+		goto err;
+	}
+
+	/* Attempt to create another directed port */
+	if (rte_event_port_setup(evdev, 1, &port_conf) == 0) {
+		printf("%d: port 1 setup expected to fail\n", __LINE__);
+		goto err;
+	}
+
+	port_conf.event_port_cfg = 0;
+
+	/* Create a load-balanced port */
+	if (rte_event_port_setup(evdev, 1, &port_conf) < 0) {
+		printf("%d: port 1 setup expected to succeed\n", __LINE__);
+		goto err;
+	}
+
+	/* Create a directed queue */
+	if (rte_event_queue_default_conf_get(evdev, 0, &queue_conf)) {
+		printf("%d: Error querying default queue conf\n", __LINE__);
+		goto err;
+	}
+
+	queue_conf.event_queue_cfg = RTE_EVENT_QUEUE_CFG_SINGLE_LINK;
+
+	if (rte_event_queue_setup(evdev, 0, &queue_conf) < 0) {
+		printf("%d: queue 0 setup expected to succeed\n", __LINE__);
+		goto err;
+	}
+
+	/* Attempt to create another directed queue */
+	if (rte_event_queue_setup(evdev, 1, &queue_conf) == 0) {
+		printf("%d: queue 1 setup expected to fail\n", __LINE__);
+		goto err;
+	}
+
+	/* Create a load-balanced queue */
+	queue_conf.event_queue_cfg = 0;
+
+	if (rte_event_queue_setup(evdev, 1, &queue_conf) < 0) {
+		printf("%d: queue 1 setup expected to succeed\n", __LINE__);
+		goto err;
+	}
+
+	/* Attempt to link directed and load-balanced resources */
+	queue_id = 1;
+	if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) == 1) {
+		printf("%d: port 0 link expected to fail\n", __LINE__);
+		goto err;
+	}
+
+	queue_id = 0;
+	if (rte_event_port_link(evdev, 1, &queue_id, NULL, 1) == 1) {
+		printf("%d: port 1 link expected to fail\n", __LINE__);
+		goto err;
+	}
+
+	/* Link ports to queues */
+	queue_id = 0;
+	if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) != 1) {
+		printf("%d: port 0 link expected to succeed\n", __LINE__);
+		goto err;
+	}
+
+	queue_id = 1;
+	if (rte_event_port_link(evdev, 1, &queue_id, NULL, 1) != 1) {
+		printf("%d: port 1 link expected to succeed\n", __LINE__);
+		goto err;
+	}
+
+	ret = rte_event_dev_close(evdev);
+	if (ret) {
+		printf("rte_event_dev_close err %d\n", ret);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	rte_event_dev_close(evdev);
+	return -1;
+}
+
+#define NUM_LDB_PORTS 64
+#define NUM_LDB_QUEUES 128
+
+static int
+test_info_get(void)
+{
+	struct rte_event_dev_config config = {0};
+	struct rte_event_dev_info info;
+	int ret;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	if (info.max_event_ports != NUM_LDB_PORTS) {
+		printf("%d: Got %u ports, expected %u\n",
+		       __LINE__, info.max_event_ports, NUM_LDB_PORTS);
+		goto err;
+	}
+
+	if (info.max_event_queues != NUM_LDB_QUEUES) {
+		printf("%d: Got %u queues, expected %u\n",
+		       __LINE__, info.max_event_queues, NUM_LDB_QUEUES);
+		goto err;
+	}
+
+	config.nb_event_ports = info.max_event_ports;
+	config.nb_event_queues = NUM_LDB_QUEUES + info.max_event_ports / 2;
+	config.nb_single_link_event_port_queues = info.max_event_ports / 2;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		goto err;
+	}
+
+	/* The DLB PMD only reports load-balanced ports and queues in its
+	 * info_get function. Confirm that these values don't include the
+	 * directed port or queue counts.
+	 */
+
+	if (info.max_event_ports != NUM_LDB_PORTS) {
+		printf("%d: Got %u ports, expected %u\n",
+		       __LINE__, info.max_event_ports, NUM_LDB_PORTS);
+		goto err;
+	}
+
+	if (info.max_event_queues != NUM_LDB_QUEUES) {
+		printf("%d: Got %u queues, expected %u\n",
+		       __LINE__, info.max_event_queues, NUM_LDB_QUEUES);
+		goto err;
+	}
+
+	ret = rte_event_dev_close(evdev);
+	if (ret) {
+		printf("rte_event_dev_close err %d\n", ret);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	rte_event_dev_close(evdev);
+	return -1;
+}
+
+static int
+test_reconfiguration_link(struct test *t)
+{
+	struct rte_event_dev_config config = {0};
+	struct rte_event_queue_conf queue_conf;
+	struct rte_event_port_conf port_conf;
+	struct rte_event_dev_info info;
+	uint8_t queue_id;
+	int ret, i;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	config.nb_event_queues = 2;
+	config.nb_event_ports = 2;
+	config.nb_single_link_event_port_queues = 0;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	/* Configure the device with 2 LDB ports and 2 LDB queues */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	/* Configure the ports and queues */
+	if (rte_event_port_default_conf_get(evdev, 0, &port_conf)) {
+		printf("%d: Error querying default port conf\n", __LINE__);
+		goto err;
+	}
+
+	for (i = 0; i < 2; i++) {
+		if (rte_event_port_setup(evdev, i, &port_conf) < 0) {
+			printf("%d: port %d setup expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	if (rte_event_queue_default_conf_get(evdev, 0, &queue_conf)) {
+		printf("%d: Error querying default queue conf\n", __LINE__);
+		goto err;
+	}
+
+	for (i = 0; i < 2; i++) {
+		if (rte_event_queue_setup(evdev, i, &queue_conf) < 0) {
+			printf("%d: queue %d setup expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	/* Link P0->Q0 and P1->Q1 */
+	for (i = 0; i < 2; i++) {
+		queue_id = i;
+
+		if (rte_event_port_link(evdev, i, &queue_id, NULL, 1) != 1) {
+			printf("%d: port %d link expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	/* Stop the device */
+	rte_event_dev_stop(evdev);
+
+	/* Reconfigure device */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error re-configuring device\n", __LINE__);
+		return -1;
+	}
+
+	/* Configure P1 and Q1, leave P0 and Q0 to be configured by the PMD. */
+	if (rte_event_port_setup(evdev, 1, &port_conf) < 0) {
+		printf("%d: port 1 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_setup(evdev, 1, &queue_conf) < 0) {
+		printf("%d: queue 1 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Link P0->Q0 and Q1 */
+	for (i = 0; i < 2; i++) {
+		queue_id = i;
+
+		if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) != 1) {
+			printf("%d: P0->Q%d link expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	/* Link P1->Q0 and Q1 */
+	for (i = 0; i < 2; i++) {
+		queue_id = i;
+
+		if (rte_event_port_link(evdev, 1, &queue_id, NULL, 1) != 1) {
+			printf("%d: P1->Q%d link expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	/* Stop the device */
+	rte_event_dev_stop(evdev);
+
+	/* Configure device with 2 DIR ports and 2 DIR queues */
+	config.nb_single_link_event_port_queues = 2;
+
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	/* Configure the ports and queues */
+	port_conf.event_port_cfg = RTE_EVENT_PORT_CFG_SINGLE_LINK;
+
+	for (i = 0; i < 2; i++) {
+		if (rte_event_port_setup(evdev, i, &port_conf) < 0) {
+			printf("%d: port %d setup expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	queue_conf.event_queue_cfg = RTE_EVENT_QUEUE_CFG_SINGLE_LINK;
+
+	for (i = 0; i < 2; i++) {
+		if (rte_event_queue_setup(evdev, i, &queue_conf) < 0) {
+			printf("%d: queue %d setup expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	/* Link P0->Q0 and P1->Q1 */
+	for (i = 0; i < 2; i++) {
+		queue_id = i;
+
+		if (rte_event_port_link(evdev, i, &queue_id, NULL, 1) != 1) {
+			printf("%d: port %d link expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	/* Stop the device */
+	rte_event_dev_stop(evdev);
+
+	/* Reconfigure device */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error re-configuring device\n", __LINE__);
+		return -1;
+	}
+
+	/* Configure P1 and Q0, leave P0 and Q1 to be configured by the PMD. */
+	if (rte_event_port_setup(evdev, 1, &port_conf) < 0) {
+		printf("%d: port 1 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_setup(evdev, 0, &queue_conf) < 0) {
+		printf("%d: queue 1 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Link P0->Q1 */
+	queue_id = 1;
+
+	if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) != 1) {
+		printf("%d: P0->Q%d link expected to succeed\n",
+		       __LINE__, i);
+		goto err;
+	}
+
+	/* Link P1->Q0 */
+	queue_id = 0;
+
+	if (rte_event_port_link(evdev, 1, &queue_id, NULL, 1) != 1) {
+		printf("%d: P1->Q%d link expected to succeed\n",
+		       __LINE__, i);
+		goto err;
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	rte_event_dev_stop(evdev);
+
+	config.nb_event_queues = 5;
+	config.nb_event_ports = 5;
+	config.nb_single_link_event_port_queues = 1;
+
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error re-configuring device\n", __LINE__);
+		return -1;
+	}
+
+	for (i = 0; i < config.nb_event_queues - 1; i++) {
+		port_conf.event_port_cfg = 0;
+		queue_conf.event_queue_cfg = 0;
+
+		if (rte_event_port_setup(evdev, i, &port_conf) < 0) {
+			printf("%d: port %d setup expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+
+		if (rte_event_queue_setup(evdev, i, &queue_conf) < 0) {
+			printf("%d: queue %d setup expected to succeed\n",
+			       __LINE__, i);
+			goto err;
+		}
+
+		queue_id = i;
+
+		if (rte_event_port_link(evdev, i, &queue_id, NULL, 1) != 1) {
+			printf("%d: P%d->Q%d link expected to succeed\n",
+			       __LINE__, i, i);
+			goto err;
+		}
+	}
+
+	port_conf.event_port_cfg = RTE_EVENT_PORT_CFG_SINGLE_LINK;
+	queue_conf.event_queue_cfg = RTE_EVENT_QUEUE_CFG_SINGLE_LINK;
+
+	if (rte_event_port_setup(evdev, i, &port_conf) < 0) {
+		printf("%d: port %d setup expected to succeed\n",
+		       __LINE__, i);
+		goto err;
+	}
+
+	if (rte_event_queue_setup(evdev, i, &queue_conf) < 0) {
+		printf("%d: queue %d setup expected to succeed\n",
+		       __LINE__, i);
+		goto err;
+	}
+
+	queue_id = i;
+
+	if (rte_event_port_link(evdev, i, &queue_id, NULL, 1) != 1) {
+		printf("%d: P%d->Q%d link expected to succeed\n",
+		       __LINE__, i, i);
+		goto err;
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	/* Stop the device */
+	rte_event_dev_stop(evdev);
+
+	config.nb_event_ports += 1;
+
+	/* Reconfigure device with 1 more load-balanced port */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error re-configuring device\n", __LINE__);
+		return -1;
+	}
+
+	port_conf.event_port_cfg = 0;
+
+	/* Configure the new port */
+	if (rte_event_port_setup(evdev, config.nb_event_ports - 1,
+				 &port_conf) < 0) {
+		printf("%d: port 1 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	cleanup(t);
+	return 0;
+
+err:
+	cleanup(t);
+	return -1;
+}
+
+static int
+test_load_balanced_traffic(struct test *t)
+{
+	uint64_t timeout;
+	struct rte_event_dev_config config = {0};
+	struct rte_event_queue_conf queue_conf;
+	struct rte_event_port_conf port_conf;
+	struct rte_event_dev_info info;
+	struct rte_event ev;
+	uint8_t queue_id;
+	int ret;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	config.nb_event_queues = 1;
+	config.nb_event_ports = 1;
+	config.nb_single_link_event_port_queues = 0;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	/* Configure the device with 1 LDB port and queue */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	/* Configure the ports and queues */
+	if (rte_event_port_default_conf_get(evdev, 0, &port_conf)) {
+		printf("%d: Error querying default port conf\n", __LINE__);
+		goto err;
+	}
+
+	if (rte_event_port_setup(evdev, 0, &port_conf) < 0) {
+		printf("%d: port 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_default_conf_get(evdev, 0, &queue_conf)) {
+		printf("%d: Error querying default queue conf\n", __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_setup(evdev, 0, &queue_conf) < 0) {
+		printf("%d: queue 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Link P0->Q0 */
+	queue_id = 0;
+
+	if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) != 1) {
+		printf("%d: port 0 link expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	/* Enqueue 1 NEW event */
+	ev.op = RTE_EVENT_OP_NEW;
+	ev.sched_type = RTE_SCHED_TYPE_ATOMIC;
+	ev.queue_id = 0;
+	ev.priority = 0;
+	ev.u64 = 0;
+
+	if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+		printf("%d: NEW enqueue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Dequeue and enqueue 1 FORWARD event */
+	timeout = 0xFFFFFFFFF;
+	if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+		printf("%d: event dequeue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	ev.op = RTE_EVENT_OP_FORWARD;
+
+	if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+		printf("%d: NEW enqueue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Dequeue and enqueue 1 RELEASE operation */
+	if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+		printf("%d: event dequeue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	ev.op = RTE_EVENT_OP_RELEASE;
+
+	if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+		printf("%d: NEW enqueue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	cleanup(t);
+	return 0;
+
+err:
+	cleanup(t);
+	return -1;
+}
+
+static int
+test_directed_traffic(struct test *t)
+{
+	uint64_t timeout;
+	struct rte_event_dev_config config = {0};
+	struct rte_event_queue_conf queue_conf;
+	struct rte_event_port_conf port_conf;
+	struct rte_event_dev_info info;
+	struct rte_event ev;
+	uint8_t queue_id;
+	int ret;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	config.nb_event_queues = 1;
+	config.nb_event_ports = 1;
+	config.nb_single_link_event_port_queues = 1;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	/* Configure the device with 1 DIR port and queue */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	/* Configure the ports and queues */
+	if (rte_event_port_default_conf_get(evdev, 0, &port_conf)) {
+		printf("%d: Error querying default port conf\n", __LINE__);
+		goto err;
+	}
+
+	port_conf.event_port_cfg = RTE_EVENT_QUEUE_CFG_SINGLE_LINK;
+
+	if (rte_event_port_setup(evdev, 0, &port_conf) < 0) {
+		printf("%d: port 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_default_conf_get(evdev, 0, &queue_conf)) {
+		printf("%d: Error querying default queue conf\n", __LINE__);
+		goto err;
+	}
+
+	queue_conf.event_queue_cfg = RTE_EVENT_QUEUE_CFG_SINGLE_LINK;
+
+	if (rte_event_queue_setup(evdev, 0, &queue_conf) < 0) {
+		printf("%d: queue 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Link P0->Q0 */
+	queue_id = 0;
+
+	if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) != 1) {
+		printf("%d: port 0 link expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	/* Enqueue 1 NEW event */
+	ev.op = RTE_EVENT_OP_NEW;
+	ev.queue_id = 0;
+	ev.priority = 0;
+	ev.u64 = 0;
+
+	if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+		printf("%d: NEW enqueue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Dequeue and enqueue 1 FORWARD event */
+	timeout = 0xFFFFFFFFF;
+	if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+		printf("%d: event dequeue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (ev.queue_id != 0) {
+		printf("%d: invalid dequeued event queue ID (%d)\n",
+		       __LINE__, ev.queue_id);
+		goto err;
+	}
+
+	ev.op = RTE_EVENT_OP_FORWARD;
+
+	if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+		printf("%d: NEW enqueue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Dequeue and enqueue 1 RELEASE operation */
+	if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+		printf("%d: event dequeue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	ev.op = RTE_EVENT_OP_RELEASE;
+
+	if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+		printf("%d: NEW enqueue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	cleanup(t);
+	return 0;
+
+err:
+	cleanup(t);
+	return -1;
+}
+
+static int
+test_deferred_sched(struct test *t)
+{
+	uint64_t timeout;
+	struct rte_event_dev_config config = {0};
+	struct rte_event_queue_conf queue_conf;
+	struct rte_event_port_conf port_conf;
+	struct rte_event_dev_info info;
+	const int num_events = 128;
+	struct rte_event ev;
+	uint8_t queue_id;
+	int ret, i;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	config.nb_event_queues = 1;
+	config.nb_event_ports = 2;
+	config.nb_single_link_event_port_queues = 0;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	/* Configure the device with 2 LDB ports and 1 queue */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	ret = rte_pmd_dlb_set_token_pop_mode(evdev, 0, DEFERRED_POP);
+	if (ret < 0) {
+		printf("%d: Error setting deferred scheduling\n", __LINE__);
+		goto err;
+	}
+
+	ret = rte_pmd_dlb_set_token_pop_mode(evdev, 1, DEFERRED_POP);
+	if (ret < 0) {
+		printf("%d: Error setting deferred scheduling\n", __LINE__);
+		goto err;
+	}
+
+	/* Configure the ports and queues */
+	if (rte_event_port_default_conf_get(evdev, 0, &port_conf)) {
+		printf("%d: Error querying default port conf\n", __LINE__);
+		goto err;
+	}
+
+	port_conf.dequeue_depth = 1;
+
+	if (rte_event_port_setup(evdev, 0, &port_conf) < 0) {
+		printf("%d: port 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_port_setup(evdev, 1, &port_conf) < 0) {
+		printf("%d: port 1 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_default_conf_get(evdev, 0, &queue_conf)) {
+		printf("%d: Error querying default queue conf\n", __LINE__);
+		goto err;
+	}
+
+	queue_conf.schedule_type = RTE_SCHED_TYPE_PARALLEL;
+	queue_conf.nb_atomic_order_sequences = 0;
+
+	if (rte_event_queue_setup(evdev, 0, &queue_conf) < 0) {
+		printf("%d: queue 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Link P0->Q0 and P1->Q0 */
+	queue_id = 0;
+
+	if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) != 1) {
+		printf("%d: port 0 link expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_port_link(evdev, 1, &queue_id, NULL, 1) != 1) {
+		printf("%d: port 1 link expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	/* Enqueue 128 NEW events */
+	ev.op = RTE_EVENT_OP_NEW;
+	ev.sched_type = RTE_SCHED_TYPE_PARALLEL;
+	ev.queue_id = 0;
+	ev.priority = 0;
+	ev.u64 = 0;
+
+	for (i = 0; i < num_events; i++) {
+		if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+			printf("%d: NEW enqueue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	/* Dequeue two events from port 0 (dequeue_depth * 2 due to the
+	 * reserved token scheme)
+	 */
+	timeout = 0xFFFFFFFFF;
+	if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+		printf("%d: event dequeue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+		printf("%d: event dequeue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Dequeue (and release) all other events from port 1. Deferred
+	 * scheduling ensures no other events are scheduled to port 0 without a
+	 * subsequent rte_event_dequeue_burst() call.
+	 */
+	for (i = 0; i < num_events - 2; i++) {
+		if (rte_event_dequeue_burst(evdev, 1, &ev, 1, timeout) != 1) {
+			printf("%d: event dequeue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+
+		ev.op = RTE_EVENT_OP_RELEASE;
+
+		if (rte_event_enqueue_burst(evdev, 1, &ev, 1) != 1) {
+			printf("%d: RELEASE enqueue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	cleanup(t);
+	return 0;
+
+err:
+	cleanup(t);
+	return -1;
+}
+
+static int
+test_delayed_pop(struct test *t)
+{
+	uint64_t timeout;
+	struct rte_event_dev_config config = {0};
+	struct rte_event_queue_conf queue_conf;
+	struct rte_event_port_conf port_conf;
+	struct rte_event_dev_info info;
+	int ret, i, num_events;
+	struct rte_event ev;
+	uint8_t queue_id;
+
+	if (rte_event_dev_info_get(evdev, &info)) {
+		printf("%d: Error querying device info\n", __LINE__);
+		return -1;
+	}
+
+	config.nb_event_queues = 1;
+	config.nb_event_ports = 1;
+	config.nb_single_link_event_port_queues = 0;
+	config.nb_event_queue_flows = info.max_event_queue_flows;
+	config.nb_events_limit = info.max_num_events;
+	config.nb_event_port_dequeue_depth = info.max_event_port_dequeue_depth;
+	config.nb_event_port_enqueue_depth = info.max_event_port_enqueue_depth;
+	config.dequeue_timeout_ns = info.max_dequeue_timeout_ns;
+	config.event_dev_cfg = RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT;
+
+	/* Configure the device with 1 LDB port and queue */
+	ret = rte_event_dev_configure(evdev, &config);
+	if (ret < 0) {
+		printf("%d: Error configuring device\n", __LINE__);
+		return -1;
+	}
+
+	ret = rte_pmd_dlb_set_token_pop_mode(evdev, 0, DELAYED_POP);
+	if (ret < 0) {
+		printf("%d: Error setting deferred scheduling\n", __LINE__);
+		goto err;
+	}
+
+	/* Configure the ports and queues */
+	if (rte_event_port_default_conf_get(evdev, 0, &port_conf)) {
+		printf("%d: Error querying default port conf\n", __LINE__);
+		goto err;
+	}
+
+	port_conf.dequeue_depth = 16;
+	port_conf.event_port_cfg = RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL;
+
+	if (rte_event_port_setup(evdev, 0, &port_conf) < 0) {
+		printf("%d: port 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_default_conf_get(evdev, 0, &queue_conf)) {
+		printf("%d: Error querying default queue conf\n", __LINE__);
+		goto err;
+	}
+
+	if (rte_event_queue_setup(evdev, 0, &queue_conf) < 0) {
+		printf("%d: queue 0 setup expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Link P0->Q0 */
+	queue_id = 0;
+
+	if (rte_event_port_link(evdev, 0, &queue_id, NULL, 1) != 1) {
+		printf("%d: port 0 link expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	/* Start the device */
+	if (rte_event_dev_start(evdev) < 0) {
+		printf("%d: device start failed\n", __LINE__);
+		goto err;
+	}
+
+	num_events = 2 * port_conf.dequeue_depth;
+
+	/* Enqueue 2 * dequeue_depth NEW events. Due to the PMD's reserved
+	 * token scheme, the port will initially behave as though its
+	 * dequeue_depth is twice the requested size.
+	 */
+	ev.op = RTE_EVENT_OP_NEW;
+	ev.sched_type = RTE_SCHED_TYPE_PARALLEL;
+	ev.queue_id = 0;
+	ev.priority = 0;
+	ev.u64 = 0;
+
+	for (i = 0; i < num_events; i++) {
+		if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+			printf("%d: NEW enqueue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	/* Flush these events out of the CQ */
+	timeout = 0xFFFFFFFFF;
+
+	for (i = 0; i < num_events; i++) {
+		if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+			printf("%d: event dequeue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	ev.op = RTE_EVENT_OP_RELEASE;
+
+	for (i = 0; i < num_events; i++) {
+		if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+			printf("%d: RELEASE enqueue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	/* Enqueue 2 * dequeue_depth NEW events again */
+	ev.op = RTE_EVENT_OP_NEW;
+	ev.sched_type = RTE_SCHED_TYPE_ATOMIC;
+	ev.queue_id = 0;
+	ev.priority = 0;
+	ev.u64 = 0;
+
+	for (i = 0; i < num_events; i++) {
+		if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+			printf("%d: NEW enqueue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	/* Dequeue dequeue_depth events but only release dequeue_depth - 1.
+	 * Delayed pop won't perform the pop and no more events will be
+	 * scheduled.
+	 */
+	for (i = 0; i < port_conf.dequeue_depth; i++) {
+		if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+			printf("%d: event dequeue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	ev.op = RTE_EVENT_OP_RELEASE;
+
+	for (i = 0; i < port_conf.dequeue_depth - 1; i++) {
+		if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+			printf("%d: RELEASE enqueue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	timeout = 0x10000;
+
+	ret = rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout);
+	if (ret != 0) {
+		printf("%d: event dequeue expected to fail (ret = %d)\n",
+		       __LINE__, ret);
+		goto err;
+	}
+
+	/* Release one more event. This will trigger the token pop, and
+	 * another batch of events will be scheduled to the device.
+	 */
+	ev.op = RTE_EVENT_OP_RELEASE;
+
+	if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) {
+		printf("%d: RELEASE enqueue expected to succeed\n",
+		       __LINE__);
+		goto err;
+	}
+
+	timeout = 0xFFFFFFFFF;
+
+	for (i = 0; i < port_conf.dequeue_depth; i++) {
+		if (rte_event_dequeue_burst(evdev, 0, &ev, 1, timeout) != 1) {
+			printf("%d: event dequeue expected to succeed\n",
+			       __LINE__);
+			goto err;
+		}
+	}
+
+	cleanup(t);
+	return 0;
+
+err:
+	cleanup(t);
+	return -1;
+}
+
+static int
+do_selftest(void)
+{
+	struct test t;
+	int ret;
+
+	/* Only create mbuf pool once, reuse for each test run */
+	if (!eventdev_func_mempool) {
+		eventdev_func_mempool =
+			rte_pktmbuf_pool_create("EVENTDEV_DLB_SA_MBUF_POOL",
+						(1 << 12), /* 4k buffers */
+						32 /*MBUF_CACHE_SIZE*/,
+						0,
+						512, /* use very small mbufs */
+						rte_socket_id());
+		if (!eventdev_func_mempool) {
+			printf("ERROR creating mempool\n");
+			goto test_fail;
+		}
+	}
+	t.mbuf_pool = eventdev_func_mempool;
+
+	printf("*** Running Stop Flush test...\n");
+	ret = test_stop_flush(&t);
+	if (ret != 0) {
+		printf("ERROR - Stop Flush test FAILED.\n");
+		return ret;
+	}
+
+	printf("*** Running Single Link test...\n");
+	ret = test_single_link();
+	if (ret != 0) {
+		printf("ERROR - Single Link test FAILED.\n");
+
+		goto test_fail;
+	}
+
+	printf("*** Running Info Get test...\n");
+	ret = test_info_get();
+	if (ret != 0) {
+		printf("ERROR - Stop Flush test FAILED.\n");
+		return ret;
+	}
+
+	printf("*** Running Reconfiguration Link test...\n");
+	ret = test_reconfiguration_link(&t);
+	if (ret != 0) {
+		printf("ERROR - Reconfiguration Link test FAILED.\n");
+
+		goto test_fail;
+	}
+
+	printf("*** Running Load-Balanced Traffic test...\n");
+	ret = test_load_balanced_traffic(&t);
+	if (ret != 0) {
+		printf("ERROR - Load-Balanced Traffic test FAILED.\n");
+
+		goto test_fail;
+	}
+
+	printf("*** Running Directed Traffic test...\n");
+	ret = test_directed_traffic(&t);
+	if (ret != 0) {
+		printf("ERROR - Directed Traffic test FAILED.\n");
+
+		goto test_fail;
+	}
+
+	printf("*** Running Deferred Scheduling test...\n");
+	ret = test_deferred_sched(&t);
+	if (ret != 0) {
+		printf("ERROR - Deferred Scheduling test FAILED.\n");
+
+		goto test_fail;
+	}
+
+	printf("*** Running Delayed Pop test...\n");
+	ret = test_delayed_pop(&t);
+	if (ret != 0) {
+		printf("ERROR - Delayed Pop test FAILED.\n");
+
+		goto test_fail;
+	}
+
+	return 0;
+
+test_fail:
+	return -1;
+}
+
+int
+test_dlb_eventdev(void)
+{
+	const char *dlb_eventdev_name = "dlb_event";
+	uint8_t num_evdevs = rte_event_dev_count();
+	int i, ret = 0;
+	int found = 0, skipped = 0, passed = 0, failed = 0;
+	struct rte_event_dev_info info;
+
+	for (i = 0; found + skipped < num_evdevs && i < RTE_EVENT_MAX_DEVS;
+	     i++) {
+		ret = rte_event_dev_info_get(i, &info);
+		if (ret < 0)
+			continue;
+
+		/* skip non-dlb event devices */
+		if (strncmp(info.driver_name, dlb_eventdev_name,
+			    sizeof(*info.driver_name)) != 0) {
+			skipped++;
+			continue;
+		}
+
+		evdev = rte_event_dev_get_dev_id(info.driver_name);
+		if (evdev < 0) {
+			printf("Could not get dev_id for eventdev with name %s, i=%d\n",
+			       info.driver_name, i);
+			skipped++;
+			continue;
+		}
+		found++;
+		printf("Running selftest on eventdev %s\n", info.driver_name);
+		ret = do_selftest();
+		if (ret == 0) {
+			passed++;
+			printf("Selftest passed for eventdev %s\n",
+			       info.driver_name);
+		} else {
+			failed++;
+			printf("Selftest failed for eventdev %s, err=%d\n",
+			       info.driver_name, ret);
+		}
+	}
+
+	printf("Ran selftest on %d eventdevs, %d skipped, %d passed, %d failed\n",
+	       found, skipped, passed, failed);
+	return ret;
+}
diff --git a/drivers/event/dlb/meson.build b/drivers/event/dlb/meson.build
index d7aeb3b..9e8ef96 100644
--- a/drivers/event/dlb/meson.build
+++ b/drivers/event/dlb/meson.build
@@ -8,6 +8,7 @@ sources = files('dlb.c',
 		'pf/dlb_pf.c',
 		'pf/base/dlb_resource.c',
 		'rte_pmd_dlb.c',
+		'dlb_selftest.c'
 )
 
 deps += ['mbuf', 'mempool', 'ring', 'pci', 'bus_pci']
-- 
2.6.4