From: "McDaniel, Timothy" <timothy.mcdan...@intel.com>

The DLB hardware does not conform exactly to the eventdev interface.
1) It has a limit on the number of queues that may be linked to a port.
2) Some ports a further restricted to a maximum of 1 linked queue.
3) It does not (currently) have the ability to carry the flow_id as part
of the event (QE) payload.

Due to the above, we would like to propose the following enhancements.

1) Add new fields to the rte_event_dev_info struct. These fields allow
the device to advertize its capabilities so that applications can take
the appropriate actions based on those capabilities.

    struct rte_event_dev_info {
        uint32_t max_event_port_links;
        /**< Maximum number of queues that can be linked to a single event
         * port by this device.
         */

        uint8_t max_single_link_event_port_queue_pairs;
        /**< Maximum number of event ports and queues that are optimized for
         * (and only capable of) single-link configurations supported by this
         * device. These ports and queues are not accounted for in
         * max_event_ports or max_event_queues.
         */
    }

2) Add a new field to the rte_event_dev_config struct. This field allows the
application to specify how many of its ports are limited to a single link,
or will be used in single link mode.

    /** Event device configuration structure */
    struct rte_event_dev_config {
        uint8_t nb_single_link_event_port_queues;
        /**< Number of event ports and queues that will be singly-linked to
         * each other. These are a subset of the overall event ports and
         * queues; this value cannot exceed *nb_event_ports* or
         * *nb_event_queues*. If the device has ports and queues that are
         * optimized for single-link usage, this field is a hint for how many
         * to allocate; otherwise, regular event ports and queues can be used.
         */
    }

3) Replace the dedicated implicit_release_disabled field with a bit field
of explicit port capabilities. The implicit_release_disable functionality
is assiged to one bit, and a port-is-single-link-only  attribute is
assigned to other, with the remaining bits available for future assignment.

        * Event port configuration bitmap flags */
        #define RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL    (1ULL << 0)
        /**< Configure the port not to release outstanding events in
         * rte_event_dev_dequeue_burst(). If set, all events received through
         * the port must be explicitly released with RTE_EVENT_OP_RELEASE or
         * RTE_EVENT_OP_FORWARD. Must be unset if the device is not
         * RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE capable.
         */
        #define RTE_EVENT_PORT_CFG_SINGLE_LINK         (1ULL << 1)

        /**< This event port links only to a single event queue.
         *
         *  @see rte_event_port_setup(), rte_event_port_link()
         */

        #define RTE_EVENT_PORT_ATTR_IMPLICIT_RELEASE_DISABLE 3
        /**
         * The implicit release disable attribute of the port
         */

        struct rte_event_port_conf {
                uint32_t event_port_cfg; /**< Port cfg flags(EVENT_PORT_CFG_) */
        }

4) Add UMWAIT/UMONITOR bit to rte_cpuflags

5) Added a new API that is useful for probing PCI devices.

        /**
         * @internal
         * Wrapper for use by pci drivers as a .probe function to attach to a 
event
         * interface.  Same as rte_event_pmd_pci_probe, except caller can 
specify
         * the name.
         */
        static inline int
        rte_event_pmd_pci_probe_named(struct rte_pci_driver *pci_drv,
                                    struct rte_pci_device *pci_dev,
                                    size_t private_data_size,
                                    eventdev_pmd_pci_callback_t devinit,
                                    const char *name);

Signed-off-by: McDaniel, Timothy <timothy.mcdan...@intel.com>
---
 app/test-eventdev/evt_common.h                     |    1 +
 app/test-eventdev/test_order_atq.c                 |    4 +
 app/test-eventdev/test_order_common.c              |    6 +-
 app/test-eventdev/test_order_queue.c               |    4 +
 app/test-eventdev/test_perf_atq.c                  |    1 +
 app/test-eventdev/test_perf_queue.c                |    1 +
 app/test-eventdev/test_pipeline_atq.c              |    1 +
 app/test-eventdev/test_pipeline_queue.c            |    1 +
 app/test/test_eventdev.c                           |    4 +-
 drivers/event/dpaa2/dpaa2_eventdev.c               |    2 +-
 drivers/event/octeontx/ssovf_evdev.c               |    2 +-
 drivers/event/skeleton/skeleton_eventdev.c         |    2 +-
 drivers/event/sw/sw_evdev.c                        |    5 +-
 drivers/event/sw/sw_evdev_selftest.c               |    9 +-
 .../eventdev_pipeline/pipeline_worker_generic.c    |    8 +-
 examples/eventdev_pipeline/pipeline_worker_tx.c    |    3 +
 examples/l2fwd-event/l2fwd_event_generic.c         |    5 +-
 examples/l2fwd-event/l2fwd_event_internal_port.c   |    5 +-
 examples/l3fwd/l3fwd_event_generic.c               |    5 +-
 examples/l3fwd/l3fwd_event_internal_port.c         |    5 +-
 lib/librte_eal/x86/include/rte_cpuflags.h          |    1 +
 lib/librte_eal/x86/rte_cpuflags.c                  |    1 +
 lib/librte_eventdev/meson.build                    |    1 +
 lib/librte_eventdev/rte_event_eth_tx_adapter.c     |    2 +-
 lib/librte_eventdev/rte_eventdev.c                 |  198 ++++++++++++++++++--
 lib/librte_eventdev/rte_eventdev.h                 |  198 ++++++++++++++++++++
 lib/librte_eventdev/rte_eventdev_pmd_pci.h         |   54 ++++++
 lib/librte_eventdev/rte_eventdev_version.map       |   13 +-
 28 files changed, 507 insertions(+), 35 deletions(-)

diff --git a/app/test-eventdev/evt_common.h b/app/test-eventdev/evt_common.h
index f9d7378..120c27b 100644
--- a/app/test-eventdev/evt_common.h
+++ b/app/test-eventdev/evt_common.h
@@ -169,6 +169,7 @@ struct evt_options {
                        .dequeue_timeout_ns = opt->deq_tmo_nsec,
                        .nb_event_queues = nb_queues,
                        .nb_event_ports = nb_ports,
+                       .nb_single_link_event_port_queues = 0,
                        .nb_events_limit  = info.max_num_events,
                        .nb_event_queue_flows = opt->nb_flows,
                        .nb_event_port_dequeue_depth =
diff --git a/app/test-eventdev/test_order_atq.c 
b/app/test-eventdev/test_order_atq.c
index 3366cfc..8246b96 100644
--- a/app/test-eventdev/test_order_atq.c
+++ b/app/test-eventdev/test_order_atq.c
@@ -34,6 +34,8 @@
                        continue;
                }
 
+               ev.flow_id = ev.mbuf->udata64;
+
                if (ev.sub_event_type == 0) { /* stage 0 from producer */
                        order_atq_process_stage_0(&ev);
                        while (rte_event_enqueue_burst(dev_id, port, &ev, 1)
@@ -68,6 +70,8 @@
                }
 
                for (i = 0; i < nb_rx; i++) {
+                       ev[i].flow_id = ev[i].mbuf->udata64;
+
                        if (ev[i].sub_event_type == 0) { /*stage 0 */
                                order_atq_process_stage_0(&ev[i]);
                        } else if (ev[i].sub_event_type == 1) { /* stage 1 */
diff --git a/app/test-eventdev/test_order_common.c 
b/app/test-eventdev/test_order_common.c
index 4190f9a..c6fcd05 100644
--- a/app/test-eventdev/test_order_common.c
+++ b/app/test-eventdev/test_order_common.c
@@ -49,6 +49,7 @@
                const uint32_t flow = (uintptr_t)m % nb_flows;
                /* Maintain seq number per flow */
                m->seqn = producer_flow_seq[flow]++;
+               m->udata64 = flow;
 
                ev.flow_id = flow;
                ev.mbuf = m;
@@ -318,10 +319,11 @@
                opt->wkr_deq_dep = dev_info.max_event_port_dequeue_depth;
 
        /* port configuration */
-       const struct rte_event_port_conf p_conf = {
+       struct rte_event_port_conf p_conf = {
                        .dequeue_depth = opt->wkr_deq_dep,
                        .enqueue_depth = dev_info.max_event_port_dequeue_depth,
                        .new_event_threshold = dev_info.max_num_events,
+                       .event_port_cfg = 0,
        };
 
        /* setup one port per worker, linking to all queues */
@@ -351,6 +353,8 @@
        p->queue_id = 0;
        p->t = t;
 
+       p_conf.new_event_threshold /= 2;
+
        ret = rte_event_port_setup(opt->dev_id, port, &p_conf);
        if (ret) {
                evt_err("failed to setup producer port %d", port);
diff --git a/app/test-eventdev/test_order_queue.c 
b/app/test-eventdev/test_order_queue.c
index 495efd9..a0a2187 100644
--- a/app/test-eventdev/test_order_queue.c
+++ b/app/test-eventdev/test_order_queue.c
@@ -34,6 +34,8 @@
                        continue;
                }
 
+               ev.flow_id = ev.mbuf->udata64;
+
                if (ev.queue_id == 0) { /* from ordered queue */
                        order_queue_process_stage_0(&ev);
                        while (rte_event_enqueue_burst(dev_id, port, &ev, 1)
@@ -68,6 +70,8 @@
                }
 
                for (i = 0; i < nb_rx; i++) {
+                       ev[i].flow_id = ev[i].mbuf->udata64;
+
                        if (ev[i].queue_id == 0) { /* from ordered queue */
                                order_queue_process_stage_0(&ev[i]);
                        } else if (ev[i].queue_id == 1) {/* from atomic queue */
diff --git a/app/test-eventdev/test_perf_atq.c 
b/app/test-eventdev/test_perf_atq.c
index 8fd5100..10846f2 100644
--- a/app/test-eventdev/test_perf_atq.c
+++ b/app/test-eventdev/test_perf_atq.c
@@ -204,6 +204,7 @@
                        .dequeue_depth = opt->wkr_deq_dep,
                        .enqueue_depth = dev_info.max_event_port_dequeue_depth,
                        .new_event_threshold = dev_info.max_num_events,
+                       .event_port_cfg = 0,
        };
 
        ret = perf_event_dev_port_setup(test, opt, 1 /* stride */, nb_queues,
diff --git a/app/test-eventdev/test_perf_queue.c 
b/app/test-eventdev/test_perf_queue.c
index f4ea3a7..a0119da 100644
--- a/app/test-eventdev/test_perf_queue.c
+++ b/app/test-eventdev/test_perf_queue.c
@@ -219,6 +219,7 @@
                        .dequeue_depth = opt->wkr_deq_dep,
                        .enqueue_depth = dev_info.max_event_port_dequeue_depth,
                        .new_event_threshold = dev_info.max_num_events,
+                       .event_port_cfg = 0,
        };
 
        ret = perf_event_dev_port_setup(test, opt, nb_stages /* stride */,
diff --git a/app/test-eventdev/test_pipeline_atq.c 
b/app/test-eventdev/test_pipeline_atq.c
index 8e8686c..a95ec0a 100644
--- a/app/test-eventdev/test_pipeline_atq.c
+++ b/app/test-eventdev/test_pipeline_atq.c
@@ -356,6 +356,7 @@
                .dequeue_depth = opt->wkr_deq_dep,
                .enqueue_depth = info.max_event_port_dequeue_depth,
                .new_event_threshold = info.max_num_events,
+               .event_port_cfg = 0,
        };
 
        if (!t->internal_port)
diff --git a/app/test-eventdev/test_pipeline_queue.c 
b/app/test-eventdev/test_pipeline_queue.c
index 7bebac3..30817dc 100644
--- a/app/test-eventdev/test_pipeline_queue.c
+++ b/app/test-eventdev/test_pipeline_queue.c
@@ -379,6 +379,7 @@
                        .dequeue_depth = opt->wkr_deq_dep,
                        .enqueue_depth = info.max_event_port_dequeue_depth,
                        .new_event_threshold = info.max_num_events,
+                       .event_port_cfg = 0,
        };
 
        if (!t->internal_port) {
diff --git a/app/test/test_eventdev.c b/app/test/test_eventdev.c
index 43ccb1c..62019c1 100644
--- a/app/test/test_eventdev.c
+++ b/app/test/test_eventdev.c
@@ -559,10 +559,10 @@
        if (!(info.event_dev_cap &
              RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE)) {
                pconf.enqueue_depth = info.max_event_port_enqueue_depth;
-               pconf.disable_implicit_release = 1;
+               pconf.event_port_cfg = RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL;
                ret = rte_event_port_setup(TEST_DEV_ID, 0, &pconf);
                TEST_ASSERT(ret == -EINVAL, "Expected -EINVAL, %d", ret);
-               pconf.disable_implicit_release = 0;
+               pconf.event_port_cfg = 0;
        }
 
        ret = rte_event_port_setup(TEST_DEV_ID, info.max_event_ports,
diff --git a/drivers/event/dpaa2/dpaa2_eventdev.c 
b/drivers/event/dpaa2/dpaa2_eventdev.c
index a196ad4..8568bfc 100644
--- a/drivers/event/dpaa2/dpaa2_eventdev.c
+++ b/drivers/event/dpaa2/dpaa2_eventdev.c
@@ -537,7 +537,7 @@ static void dpaa2_eventdev_process_atomic(struct qbman_swp 
*swp,
                DPAA2_EVENT_MAX_PORT_DEQUEUE_DEPTH;
        port_conf->enqueue_depth =
                DPAA2_EVENT_MAX_PORT_ENQUEUE_DEPTH;
-       port_conf->disable_implicit_release = 0;
+       port_conf->event_port_cfg = 0;
 }
 
 static int
diff --git a/drivers/event/octeontx/ssovf_evdev.c 
b/drivers/event/octeontx/ssovf_evdev.c
index 1b1a5d9..99c0b2e 100644
--- a/drivers/event/octeontx/ssovf_evdev.c
+++ b/drivers/event/octeontx/ssovf_evdev.c
@@ -224,7 +224,7 @@ struct ssovf_mbox_convert_ns_getworks_iter {
        port_conf->new_event_threshold = edev->max_num_events;
        port_conf->dequeue_depth = 1;
        port_conf->enqueue_depth = 1;
-       port_conf->disable_implicit_release = 0;
+       port_conf->event_port_cfg = 0;
 }
 
 static void
diff --git a/drivers/event/skeleton/skeleton_eventdev.c 
b/drivers/event/skeleton/skeleton_eventdev.c
index c889220..37d569b 100644
--- a/drivers/event/skeleton/skeleton_eventdev.c
+++ b/drivers/event/skeleton/skeleton_eventdev.c
@@ -209,7 +209,7 @@
        port_conf->new_event_threshold = 32 * 1024;
        port_conf->dequeue_depth = 16;
        port_conf->enqueue_depth = 16;
-       port_conf->disable_implicit_release = 0;
+       port_conf->event_port_cfg = 0;
 }
 
 static void
diff --git a/drivers/event/sw/sw_evdev.c b/drivers/event/sw/sw_evdev.c
index fb8e8be..0b3dd9c 100644
--- a/drivers/event/sw/sw_evdev.c
+++ b/drivers/event/sw/sw_evdev.c
@@ -175,7 +175,8 @@
        }
 
        p->inflight_max = conf->new_event_threshold;
-       p->implicit_release = !conf->disable_implicit_release;
+       p->implicit_release = !(conf->event_port_cfg &
+                               RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL);
 
        /* check if ring exists, same as rx_worker above */
        snprintf(buf, sizeof(buf), "sw%d_p%u, %s", dev->data->dev_id,
@@ -508,7 +509,7 @@
        port_conf->new_event_threshold = 1024;
        port_conf->dequeue_depth = 16;
        port_conf->enqueue_depth = 16;
-       port_conf->disable_implicit_release = 0;
+       port_conf->event_port_cfg = 0;
 }
 
 static int
diff --git a/drivers/event/sw/sw_evdev_selftest.c 
b/drivers/event/sw/sw_evdev_selftest.c
index 38c21fa..a78d6cd 100644
--- a/drivers/event/sw/sw_evdev_selftest.c
+++ b/drivers/event/sw/sw_evdev_selftest.c
@@ -172,7 +172,7 @@ struct test {
                        .new_event_threshold = 1024,
                        .dequeue_depth = 32,
                        .enqueue_depth = 64,
-                       .disable_implicit_release = 0,
+                       .event_port_cfg = 0,
        };
        if (num_ports > MAX_PORTS)
                return -1;
@@ -1227,7 +1227,7 @@ struct test_event_dev_stats {
                                .new_event_threshold = 128,
                                .dequeue_depth = 32,
                                .enqueue_depth = 64,
-                               .disable_implicit_release = 0,
+                               .event_port_cfg = 0,
                };
                if (rte_event_port_setup(evdev, 0, &port_conf) < 0) {
                        printf("%d Error setting up port\n", __LINE__);
@@ -1317,7 +1317,7 @@ struct test_event_dev_stats {
                .new_event_threshold = 128,
                .dequeue_depth = 32,
                .enqueue_depth = 64,
-               .disable_implicit_release = 0,
+               .event_port_cfg = 0,
        };
        if (rte_event_port_setup(evdev, 0, &port_conf) < 0) {
                printf("%d Error setting up port\n", __LINE__);
@@ -3079,7 +3079,8 @@ struct test_event_dev_stats {
         * only be initialized once - and this needs to be set for multiple runs
         */
        conf.new_event_threshold = 512;
-       conf.disable_implicit_release = disable_implicit_release;
+       conf.event_port_cfg = disable_implicit_release ?
+               RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL : 0;
 
        if (rte_event_port_setup(evdev, 0, &conf) < 0) {
                printf("Error setting up RX port\n");
diff --git a/examples/eventdev_pipeline/pipeline_worker_generic.c 
b/examples/eventdev_pipeline/pipeline_worker_generic.c
index 42ff4ee..a091da3 100644
--- a/examples/eventdev_pipeline/pipeline_worker_generic.c
+++ b/examples/eventdev_pipeline/pipeline_worker_generic.c
@@ -129,6 +129,7 @@
        struct rte_event_dev_config config = {
                        .nb_event_queues = nb_queues,
                        .nb_event_ports = nb_ports,
+                       .nb_single_link_event_port_queues = 1,
                        .nb_events_limit  = 4096,
                        .nb_event_queue_flows = 1024,
                        .nb_event_port_dequeue_depth = 128,
@@ -138,12 +139,13 @@
                        .dequeue_depth = cdata.worker_cq_depth,
                        .enqueue_depth = 64,
                        .new_event_threshold = 4096,
+                       .event_port_cfg = 0,
        };
        struct rte_event_queue_conf wkr_q_conf = {
                        .schedule_type = cdata.queue_type,
                        .priority = RTE_EVENT_DEV_PRIORITY_NORMAL,
                        .nb_atomic_flows = 1024,
-               .nb_atomic_order_sequences = 1024,
+                       .nb_atomic_order_sequences = 1024,
        };
        struct rte_event_queue_conf tx_q_conf = {
                        .priority = RTE_EVENT_DEV_PRIORITY_HIGHEST,
@@ -167,7 +169,8 @@
        disable_implicit_release = (dev_info.event_dev_cap &
                        RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE);
 
-       wkr_p_conf.disable_implicit_release = disable_implicit_release;
+       wkr_p_conf.event_port_cfg = disable_implicit_release ?
+               RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL : 0;
 
        if (dev_info.max_num_events < config.nb_events_limit)
                config.nb_events_limit = dev_info.max_num_events;
@@ -417,6 +420,7 @@
                .dequeue_depth = cdata.worker_cq_depth,
                .enqueue_depth = 64,
                .new_event_threshold = 4096,
+               .event_port_cfg = 0,
        };
 
        if (adptr_p_conf.new_event_threshold > dev_info.max_num_events)
diff --git a/examples/eventdev_pipeline/pipeline_worker_tx.c 
b/examples/eventdev_pipeline/pipeline_worker_tx.c
index 55bb2f7..e8a9652 100644
--- a/examples/eventdev_pipeline/pipeline_worker_tx.c
+++ b/examples/eventdev_pipeline/pipeline_worker_tx.c
@@ -436,6 +436,7 @@
        struct rte_event_dev_config config = {
                        .nb_event_queues = nb_queues,
                        .nb_event_ports = nb_ports,
+                       .nb_single_link_event_port_queues = 0,
                        .nb_events_limit  = 4096,
                        .nb_event_queue_flows = 1024,
                        .nb_event_port_dequeue_depth = 128,
@@ -445,6 +446,7 @@
                        .dequeue_depth = cdata.worker_cq_depth,
                        .enqueue_depth = 64,
                        .new_event_threshold = 4096,
+                       .event_port_cfg = 0,
        };
        struct rte_event_queue_conf wkr_q_conf = {
                        .schedule_type = cdata.queue_type,
@@ -746,6 +748,7 @@ struct rx_adptr_services {
                .dequeue_depth = cdata.worker_cq_depth,
                .enqueue_depth = 64,
                .new_event_threshold = 4096,
+               .event_port_cfg = 0,
        };
 
        init_ports(nb_ports);
diff --git a/examples/l2fwd-event/l2fwd_event_generic.c 
b/examples/l2fwd-event/l2fwd_event_generic.c
index 2dc95e5..e01df04 100644
--- a/examples/l2fwd-event/l2fwd_event_generic.c
+++ b/examples/l2fwd-event/l2fwd_event_generic.c
@@ -126,8 +126,9 @@
        if (def_p_conf.enqueue_depth < event_p_conf.enqueue_depth)
                event_p_conf.enqueue_depth = def_p_conf.enqueue_depth;
 
-       event_p_conf.disable_implicit_release =
-               evt_rsrc->disable_implicit_release;
+       event_p_conf.event_port_cfg = 0;
+       if (evt_rsrc->disable_implicit_release)
+               event_p_conf.event_port_cfg |= 
RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL;
        evt_rsrc->deq_depth = def_p_conf.dequeue_depth;
 
        for (event_p_id = 0; event_p_id < evt_rsrc->evp.nb_ports;
diff --git a/examples/l2fwd-event/l2fwd_event_internal_port.c 
b/examples/l2fwd-event/l2fwd_event_internal_port.c
index 63d57b4..f54327b 100644
--- a/examples/l2fwd-event/l2fwd_event_internal_port.c
+++ b/examples/l2fwd-event/l2fwd_event_internal_port.c
@@ -123,8 +123,9 @@
        if (def_p_conf.enqueue_depth < event_p_conf.enqueue_depth)
                event_p_conf.enqueue_depth = def_p_conf.enqueue_depth;
 
-       event_p_conf.disable_implicit_release =
-               evt_rsrc->disable_implicit_release;
+       event_p_conf.event_port_cfg = 0;
+       if (evt_rsrc->disable_implicit_release)
+               event_p_conf.event_port_cfg |= 
RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL;
 
        for (event_p_id = 0; event_p_id < evt_rsrc->evp.nb_ports;
                                                                event_p_id++) {
diff --git a/examples/l3fwd/l3fwd_event_generic.c 
b/examples/l3fwd/l3fwd_event_generic.c
index f8c9843..409a410 100644
--- a/examples/l3fwd/l3fwd_event_generic.c
+++ b/examples/l3fwd/l3fwd_event_generic.c
@@ -115,8 +115,9 @@
        if (def_p_conf.enqueue_depth < event_p_conf.enqueue_depth)
                event_p_conf.enqueue_depth = def_p_conf.enqueue_depth;
 
-       event_p_conf.disable_implicit_release =
-               evt_rsrc->disable_implicit_release;
+       event_p_conf.event_port_cfg = 0;
+       if (evt_rsrc->disable_implicit_release)
+               event_p_conf.event_port_cfg |= 
RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL;
        evt_rsrc->deq_depth = def_p_conf.dequeue_depth;
 
        for (event_p_id = 0; event_p_id < evt_rsrc->evp.nb_ports;
diff --git a/examples/l3fwd/l3fwd_event_internal_port.c 
b/examples/l3fwd/l3fwd_event_internal_port.c
index 03ac581..df410f1 100644
--- a/examples/l3fwd/l3fwd_event_internal_port.c
+++ b/examples/l3fwd/l3fwd_event_internal_port.c
@@ -113,8 +113,9 @@
        if (def_p_conf.enqueue_depth < event_p_conf.enqueue_depth)
                event_p_conf.enqueue_depth = def_p_conf.enqueue_depth;
 
-       event_p_conf.disable_implicit_release =
-               evt_rsrc->disable_implicit_release;
+       event_p_conf.event_port_cfg = 0;
+       if (evt_rsrc->disable_implicit_release)
+               event_p_conf.event_port_cfg |= 
RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL;
 
        for (event_p_id = 0; event_p_id < evt_rsrc->evp.nb_ports;
                                                                event_p_id++) {
diff --git a/lib/librte_eal/x86/include/rte_cpuflags.h 
b/lib/librte_eal/x86/include/rte_cpuflags.h
index c1d2036..ab2c3b3 100644
--- a/lib/librte_eal/x86/include/rte_cpuflags.h
+++ b/lib/librte_eal/x86/include/rte_cpuflags.h
@@ -130,6 +130,7 @@ enum rte_cpu_flag_t {
        RTE_CPUFLAG_CLDEMOTE,               /**< Cache Line Demote */
        RTE_CPUFLAG_MOVDIRI,                /**< Direct Store Instructions */
        RTE_CPUFLAG_MOVDIR64B,              /**< Direct Store Instructions 64B 
*/
+       RTE_CPUFLAG_UMWAIT,                 /**< UMONITOR/UMWAIT */
        RTE_CPUFLAG_AVX512VP2INTERSECT,     /**< AVX512 Two Register 
Intersection */
 
        /* The last item */
diff --git a/lib/librte_eal/x86/rte_cpuflags.c 
b/lib/librte_eal/x86/rte_cpuflags.c
index 30439e7..69ac0db 100644
--- a/lib/librte_eal/x86/rte_cpuflags.c
+++ b/lib/librte_eal/x86/rte_cpuflags.c
@@ -137,6 +137,7 @@ struct feature_entry {
        FEAT_DEF(CLDEMOTE, 0x00000007, 0, RTE_REG_ECX, 25)
        FEAT_DEF(MOVDIRI, 0x00000007, 0, RTE_REG_ECX, 27)
        FEAT_DEF(MOVDIR64B, 0x00000007, 0, RTE_REG_ECX, 28)
+        FEAT_DEF(UMWAIT, 0x00000007, 0, RTE_REG_ECX, 5)
        FEAT_DEF(AVX512VP2INTERSECT, 0x00000007, 0, RTE_REG_EDX, 8)
 };
 
diff --git a/lib/librte_eventdev/meson.build b/lib/librte_eventdev/meson.build
index d1f25ee..17f7f40 100644
--- a/lib/librte_eventdev/meson.build
+++ b/lib/librte_eventdev/meson.build
@@ -7,6 +7,7 @@ else
        cflags += '-DBSD'
 endif
 
+use_function_versioning = true
 sources = files('rte_eventdev.c',
                'rte_event_ring.c',
                'eventdev_trace_points.c',
diff --git a/lib/librte_eventdev/rte_event_eth_tx_adapter.c 
b/lib/librte_eventdev/rte_event_eth_tx_adapter.c
index bb21dc4..8a72256 100644
--- a/lib/librte_eventdev/rte_event_eth_tx_adapter.c
+++ b/lib/librte_eventdev/rte_event_eth_tx_adapter.c
@@ -286,7 +286,7 @@ static int txa_service_queue_del(uint8_t id,
                return ret;
        }
 
-       pc->disable_implicit_release = 0;
+       pc->event_port_cfg = 0;
        ret = rte_event_port_setup(dev_id, port_id, pc);
        if (ret) {
                RTE_EDEV_LOG_ERR("failed to setup event port %u\n",
diff --git a/lib/librte_eventdev/rte_eventdev.c 
b/lib/librte_eventdev/rte_eventdev.c
index 82c177c..e8d7c0d 100644
--- a/lib/librte_eventdev/rte_eventdev.c
+++ b/lib/librte_eventdev/rte_eventdev.c
@@ -32,6 +32,8 @@
 #include <rte_ethdev.h>
 #include <rte_cryptodev.h>
 #include <rte_cryptodev_pmd.h>
+#include <rte_compat.h>
+#include <rte_function_versioning.h>
 
 #include "rte_eventdev.h"
 #include "rte_eventdev_pmd.h"
@@ -87,7 +89,47 @@
 }
 
 int
-rte_event_dev_info_get(uint8_t dev_id, struct rte_event_dev_info *dev_info)
+rte_event_dev_info_get_v20(uint8_t dev_id,
+                            struct rte_event_dev_info_v20 *dev_info)
+{
+       struct rte_event_dev_info new_dev_info;
+       int err;
+
+       if (dev_info == NULL)
+               return -EINVAL;
+
+       memset(&new_dev_info, 0, sizeof(struct rte_event_dev_info));
+
+       err = rte_event_dev_info_get(dev_id, &new_dev_info);
+       if (err)
+               return err;
+
+       dev_info->driver_name = new_dev_info.driver_name;
+       dev_info->dev = new_dev_info.dev;
+       dev_info->min_dequeue_timeout_ns = new_dev_info.min_dequeue_timeout_ns;
+       dev_info->max_dequeue_timeout_ns = new_dev_info.max_dequeue_timeout_ns;
+       dev_info->max_event_queues = new_dev_info.max_event_queues;
+       dev_info->max_event_queue_flows = new_dev_info.max_event_queue_flows;
+       dev_info->max_event_queue_priority_levels =
+               new_dev_info.max_event_queue_priority_levels;
+       dev_info->max_event_priority_levels =
+               new_dev_info.max_event_priority_levels;
+       dev_info->max_event_ports = new_dev_info.max_event_ports;
+       dev_info->max_event_port_dequeue_depth =
+               new_dev_info.max_event_port_dequeue_depth;
+       dev_info->max_event_port_enqueue_depth =
+               new_dev_info.max_event_port_enqueue_depth;
+       dev_info->max_num_events = new_dev_info.max_num_events;
+       dev_info->event_dev_cap = new_dev_info.event_dev_cap;
+       dev_info->dequeue_timeout_ns = new_dev_info.dequeue_timeout_ns;
+
+       return 0;
+}
+VERSION_SYMBOL(rte_event_dev_info_get, _v20, 20);
+
+int
+rte_event_dev_info_get_v21(uint8_t dev_id,
+                            struct rte_event_dev_info *dev_info)
 {
        struct rte_eventdev *dev;
 
@@ -107,6 +149,10 @@
        dev_info->dev = dev->dev;
        return 0;
 }
+BIND_DEFAULT_SYMBOL(rte_event_dev_info_get, _v21, 21);
+MAP_STATIC_SYMBOL(int rte_event_dev_info_get(uint8_t dev_id,
+                       struct rte_event_dev_info *dev_info),
+                       rte_event_dev_info_get_v21);
 
 int
 rte_event_eth_rx_adapter_caps_get(uint8_t dev_id, uint16_t eth_port_id,
@@ -385,7 +431,29 @@
 }
 
 int
-rte_event_dev_configure(uint8_t dev_id,
+rte_event_dev_configure_v20(uint8_t dev_id,
+                             const struct rte_event_dev_config_v20 *dev_conf)
+{
+       struct rte_event_dev_config new_dev_conf;
+
+       new_dev_conf.dequeue_timeout_ns = dev_conf->dequeue_timeout_ns;
+       new_dev_conf.nb_events_limit = dev_conf->nb_events_limit;
+       new_dev_conf.nb_event_queues = dev_conf->nb_event_queues;
+       new_dev_conf.nb_event_ports = dev_conf->nb_event_ports;
+       new_dev_conf.nb_event_queue_flows = dev_conf->nb_event_queue_flows;
+       new_dev_conf.nb_event_port_dequeue_depth =
+               dev_conf->nb_event_port_dequeue_depth;
+       new_dev_conf.nb_event_port_enqueue_depth =
+               dev_conf->nb_event_port_enqueue_depth;
+       new_dev_conf.event_dev_cfg = dev_conf->event_dev_cfg;
+       new_dev_conf.nb_single_link_event_port_queues = 0;
+
+       return rte_event_dev_configure(dev_id, &new_dev_conf);
+}
+VERSION_SYMBOL(rte_event_dev_info_get, _v20, 20);
+
+int
+rte_event_dev_configure_v21(uint8_t dev_id,
                        const struct rte_event_dev_config *dev_conf)
 {
        struct rte_eventdev *dev;
@@ -437,9 +505,29 @@
                                        dev_id);
                return -EINVAL;
        }
-       if (dev_conf->nb_event_queues > info.max_event_queues) {
-               RTE_EDEV_LOG_ERR("%d nb_event_queues=%d > max_event_queues=%d",
-               dev_id, dev_conf->nb_event_queues, info.max_event_queues);
+       if (dev_conf->nb_event_queues > info.max_event_queues +
+                       info.max_single_link_event_port_queue_pairs) {
+               RTE_EDEV_LOG_ERR("%d nb_event_queues=%d > max_event_queues=%d + 
max_single_link_event_port_queue_pairs=%d",
+                                dev_id, dev_conf->nb_event_queues,
+                                info.max_event_queues,
+                                info.max_single_link_event_port_queue_pairs);
+               return -EINVAL;
+       }
+       if (dev_conf->nb_event_queues -
+                       dev_conf->nb_single_link_event_port_queues >
+                       info.max_event_queues) {
+               RTE_EDEV_LOG_ERR("id%d nb_event_queues=%d - 
nb_single_link_event_port_queues=%d > max_event_queues=%d",
+                                dev_id, dev_conf->nb_event_queues,
+                                dev_conf->nb_single_link_event_port_queues,
+                                info.max_event_queues);
+               return -EINVAL;
+       }
+       if (dev_conf->nb_single_link_event_port_queues >
+                       dev_conf->nb_event_queues) {
+               RTE_EDEV_LOG_ERR("dev%d nb_single_link_event_port_queues=%d > 
nb_event_queues=%d",
+                                dev_id,
+                                dev_conf->nb_single_link_event_port_queues,
+                                dev_conf->nb_event_queues);
                return -EINVAL;
        }
 
@@ -448,9 +536,31 @@
                RTE_EDEV_LOG_ERR("dev%d nb_event_ports cannot be zero", dev_id);
                return -EINVAL;
        }
-       if (dev_conf->nb_event_ports > info.max_event_ports) {
-               RTE_EDEV_LOG_ERR("id%d nb_event_ports=%d > max_event_ports= %d",
-               dev_id, dev_conf->nb_event_ports, info.max_event_ports);
+       if (dev_conf->nb_event_ports > info.max_event_ports +
+                       info.max_single_link_event_port_queue_pairs) {
+               RTE_EDEV_LOG_ERR("id%d nb_event_ports=%d > max_event_ports=%d + 
max_single_link_event_port_queue_pairs=%d",
+                                dev_id, dev_conf->nb_event_ports,
+                                info.max_event_ports,
+                                info.max_single_link_event_port_queue_pairs);
+               return -EINVAL;
+       }
+       if (dev_conf->nb_event_ports -
+                       dev_conf->nb_single_link_event_port_queues
+                       > info.max_event_ports) {
+               RTE_EDEV_LOG_ERR("id%d nb_event_ports=%d - 
nb_single_link_event_port_queues=%d > max_event_ports=%d",
+                                dev_id, dev_conf->nb_event_ports,
+                                dev_conf->nb_single_link_event_port_queues,
+                                info.max_event_ports);
+               return -EINVAL;
+       }
+
+       if (dev_conf->nb_single_link_event_port_queues >
+           dev_conf->nb_event_ports) {
+               RTE_EDEV_LOG_ERR(
+                                "dev%d nb_single_link_event_port_queues=%d > 
nb_event_ports=%d",
+                                dev_id,
+                                dev_conf->nb_single_link_event_port_queues,
+                                dev_conf->nb_event_ports);
                return -EINVAL;
        }
 
@@ -528,6 +638,10 @@
        rte_eventdev_trace_configure(dev_id, dev_conf, diag);
        return diag;
 }
+BIND_DEFAULT_SYMBOL(rte_event_dev_configure, _v21, 21);
+MAP_STATIC_SYMBOL(int rte_event_dev_configure(uint8_t dev_id,
+                       const struct rte_event_dev_config *dev_conf),
+                       rte_event_dev_configure_v21);
 
 static inline int
 is_valid_queue(struct rte_eventdev *dev, uint8_t queue_id)
@@ -666,7 +780,33 @@
 }
 
 int
-rte_event_port_default_conf_get(uint8_t dev_id, uint8_t port_id,
+rte_event_port_default_conf_get_v20(uint8_t dev_id, uint8_t port_id,
+                                struct rte_event_port_conf_v20 *port_conf)
+{
+       struct rte_event_port_conf new_port_conf;
+       int err;
+
+       if (port_conf == NULL)
+               return -EINVAL;
+
+       memset(&new_port_conf, 0, sizeof(new_port_conf));
+
+       err = rte_event_port_default_conf_get(dev_id, port_id, &new_port_conf);
+       if (err)
+               return err;
+
+       port_conf->new_event_threshold = new_port_conf.new_event_threshold;
+       port_conf->dequeue_depth = new_port_conf.dequeue_depth;
+       port_conf->enqueue_depth = new_port_conf.enqueue_depth;
+       port_conf->disable_implicit_release = !!(new_port_conf.event_port_cfg &
+               RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL);
+
+       return 0;
+}
+VERSION_SYMBOL(rte_event_port_default_conf_get, _v20, 20);
+
+int
+rte_event_port_default_conf_get_v21(uint8_t dev_id, uint8_t port_id,
                                 struct rte_event_port_conf *port_conf)
 {
        struct rte_eventdev *dev;
@@ -687,9 +827,35 @@
        (*dev->dev_ops->port_def_conf)(dev, port_id, port_conf);
        return 0;
 }
+BIND_DEFAULT_SYMBOL(rte_event_port_default_conf_get, _v21, 21);
+MAP_STATIC_SYMBOL(int rte_event_port_default_conf_get(uint8_t dev_id,
+                       uint8_t port_id, struct rte_event_port_conf *port_conf),
+                       rte_event_port_default_conf_get_v21);
 
 int
-rte_event_port_setup(uint8_t dev_id, uint8_t port_id,
+rte_event_port_setup_v20(uint8_t dev_id, uint8_t port_id,
+                    const struct rte_event_port_conf_v20 *port_conf)
+{
+       struct rte_event_port_conf new_port_conf;
+
+       if (port_conf == NULL)
+               return -EINVAL;
+
+       new_port_conf.new_event_threshold = port_conf->new_event_threshold;
+       new_port_conf.dequeue_depth = port_conf->dequeue_depth;
+       new_port_conf.enqueue_depth = port_conf->enqueue_depth;
+       new_port_conf.event_port_cfg = 0;
+       if (port_conf->disable_implicit_release)
+               new_port_conf.event_port_cfg =
+                       RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL;
+
+       return rte_event_port_setup(dev_id, port_id, &new_port_conf);
+
+}
+VERSION_SYMBOL(rte_event_port_setup, _v20, 20);
+
+int
+rte_event_port_setup_v21(uint8_t dev_id, uint8_t port_id,
                     const struct rte_event_port_conf *port_conf)
 {
        struct rte_eventdev *dev;
@@ -737,7 +903,8 @@
                return -EINVAL;
        }
 
-       if (port_conf && port_conf->disable_implicit_release &&
+       if (port_conf &&
+           (port_conf->event_port_cfg & RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL) &&
            !(dev->data->event_dev_cap &
              RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE)) {
                RTE_EDEV_LOG_ERR(
@@ -775,6 +942,10 @@
 
        return 0;
 }
+BIND_DEFAULT_SYMBOL(rte_event_port_setup, _v21, 21);
+MAP_STATIC_SYMBOL(int rte_event_port_setup(uint8_t dev_id, uint8_t port_id,
+                 const struct rte_event_port_conf *port_conf),
+                 rte_event_port_setup_v21);
 
 int
 rte_event_dev_attr_get(uint8_t dev_id, uint32_t attr_id,
@@ -809,6 +980,7 @@
                        uint32_t *attr_value)
 {
        struct rte_eventdev *dev;
+       uint32_t config;
 
        if (!attr_value)
                return -EINVAL;
@@ -830,6 +1002,10 @@
        case RTE_EVENT_PORT_ATTR_NEW_EVENT_THRESHOLD:
                *attr_value = dev->data->ports_cfg[port_id].new_event_threshold;
                break;
+       case RTE_EVENT_PORT_ATTR_IMPLICIT_RELEASE_DISABLE:
+               config = dev->data->ports_cfg[port_id].event_port_cfg;
+               *attr_value = !!(config & RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL);
+               break;
        default:
                return -EINVAL;
        };
diff --git a/lib/librte_eventdev/rte_eventdev.h 
b/lib/librte_eventdev/rte_eventdev.h
index 7dc8323..e7155e6 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -291,6 +291,12 @@
  * single queue to each port or map a single queue to many port.
  */
 
+#define RTE_EVENT_DEV_CAP_CARRY_FLOW_ID (1ULL << 9)
+/**< Event device preserves the flow ID from the enqueued
+ * event to the dequeued event if the flag is set. Otherwise,
+ * the content of this field is implementation dependent.
+ */
+
 /* Event device priority levels */
 #define RTE_EVENT_DEV_PRIORITY_HIGHEST   0
 /**< Highest priority expressed across eventdev subsystem
@@ -380,6 +386,58 @@ struct rte_event_dev_info {
         * event port by this device.
         * A device that does not support bulk enqueue will set this as 1.
         */
+       uint8_t max_event_port_links;
+       /**< Maximum number of queues that can be linked to a single event
+        * port by this device.
+        */
+       int32_t max_num_events;
+       /**< A *closed system* event dev has a limit on the number of events it
+        * can manage at a time. An *open system* event dev does not have a
+        * limit and will specify this as -1.
+        */
+       uint32_t event_dev_cap;
+       /**< Event device capabilities(RTE_EVENT_DEV_CAP_)*/
+       uint8_t max_single_link_event_port_queue_pairs;
+       /**< Maximum number of event ports and queues that are optimized for
+        * (and only capable of) single-link configurations supported by this
+        * device. These ports and queues are not accounted for in
+        * max_event_ports or max_event_queues.
+        */
+};
+
+struct rte_event_dev_info_v20 {
+       const char *driver_name;        /**< Event driver name */
+       struct rte_device *dev; /**< Device information */
+       uint32_t min_dequeue_timeout_ns;
+       /**< Minimum supported global dequeue timeout(ns) by this device */
+       uint32_t max_dequeue_timeout_ns;
+       /**< Maximum supported global dequeue timeout(ns) by this device */
+       uint32_t dequeue_timeout_ns;
+       /**< Configured global dequeue timeout(ns) for this device */
+       uint8_t max_event_queues;
+       /**< Maximum event_queues supported by this device */
+       uint32_t max_event_queue_flows;
+       /**< Maximum supported flows in an event queue by this device*/
+       uint8_t max_event_queue_priority_levels;
+       /**< Maximum number of event queue priority levels by this device.
+        * Valid when the device has RTE_EVENT_DEV_CAP_QUEUE_QOS capability
+        */
+       uint8_t max_event_priority_levels;
+       /**< Maximum number of event priority levels by this device.
+        * Valid when the device has RTE_EVENT_DEV_CAP_EVENT_QOS capability
+        */
+       uint8_t max_event_ports;
+       /**< Maximum number of event ports supported by this device */
+       uint8_t max_event_port_dequeue_depth;
+       /**< Maximum number of events can be dequeued at a time from an
+        * event port by this device.
+        * A device that does not support bulk dequeue will set this as 1.
+        */
+       uint32_t max_event_port_enqueue_depth;
+       /**< Maximum number of events can be enqueued at a time from an
+        * event port by this device.
+        * A device that does not support bulk enqueue will set this as 1.
+        */
        int32_t max_num_events;
        /**< A *closed system* event dev has a limit on the number of events it
         * can manage at a time. An *open system* event dev does not have a
@@ -407,6 +465,14 @@ struct rte_event_dev_info {
 int
 rte_event_dev_info_get(uint8_t dev_id, struct rte_event_dev_info *dev_info);
 
+int
+rte_event_dev_info_get_v20(uint8_t dev_id,
+                            struct rte_event_dev_info_v20 *dev_info);
+
+int
+rte_event_dev_info_get_v21(uint8_t dev_id,
+                            struct rte_event_dev_info *dev_info);
+
 /**
  * The count of ports.
  */
@@ -494,6 +560,67 @@ struct rte_event_dev_config {
         */
        uint32_t event_dev_cfg;
        /**< Event device config flags(RTE_EVENT_DEV_CFG_)*/
+       uint8_t nb_single_link_event_port_queues;
+       /**< Number of event ports and queues that will be singly-linked to
+        * each other. These are a subset of the overall event ports and
+        * queues; this value cannot exceed *nb_event_ports* or
+        * *nb_event_queues*. If the device has ports and queues that are
+        * optimized for single-link usage, this field is a hint for how many
+        * to allocate; otherwise, regular event ports and queues can be used.
+        */
+};
+
+/** Event device configuration structure */
+struct rte_event_dev_config_v20 {
+       uint32_t dequeue_timeout_ns;
+       /**< rte_event_dequeue_burst() timeout on this device.
+        * This value should be in the range of *min_dequeue_timeout_ns* and
+        * *max_dequeue_timeout_ns* which previously provided in
+        * rte_event_dev_info_get()
+        * The value 0 is allowed, in which case, default dequeue timeout used.
+        * @see RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT
+        */
+       int32_t nb_events_limit;
+       /**< In a *closed system* this field is the limit on maximum number of
+        * events that can be inflight in the eventdev at a given time. The
+        * limit is required to ensure that the finite space in a closed system
+        * is not overwhelmed. The value cannot exceed the *max_num_events*
+        * as provided by rte_event_dev_info_get().
+        * This value should be set to -1 for *open system*.
+        */
+       uint8_t nb_event_queues;
+       /**< Number of event queues to configure on this device.
+        * This value cannot exceed the *max_event_queues* which previously
+        * provided in rte_event_dev_info_get()
+        */
+       uint8_t nb_event_ports;
+       /**< Number of event ports to configure on this device.
+        * This value cannot exceed the *max_event_ports* which previously
+        * provided in rte_event_dev_info_get()
+        */
+       uint32_t nb_event_queue_flows;
+       /**< Number of flows for any event queue on this device.
+        * This value cannot exceed the *max_event_queue_flows* which previously
+        * provided in rte_event_dev_info_get()
+        */
+       uint32_t nb_event_port_dequeue_depth;
+       /**< Maximum number of events can be dequeued at a time from an
+        * event port by this device.
+        * This value cannot exceed the *max_event_port_dequeue_depth*
+        * which previously provided in rte_event_dev_info_get().
+        * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable.
+        * @see rte_event_port_setup()
+        */
+       uint32_t nb_event_port_enqueue_depth;
+       /**< Maximum number of events can be enqueued at a time from an
+        * event port by this device.
+        * This value cannot exceed the *max_event_port_enqueue_depth*
+        * which previously provided in rte_event_dev_info_get().
+        * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable.
+        * @see rte_event_port_setup()
+        */
+       uint32_t event_dev_cfg;
+       /**< Event device config flags(RTE_EVENT_DEV_CFG_)*/
 };
 
 /**
@@ -519,6 +646,13 @@ struct rte_event_dev_config {
 rte_event_dev_configure(uint8_t dev_id,
                        const struct rte_event_dev_config *dev_conf);
 
+int
+rte_event_dev_configure_v20(uint8_t dev_id,
+                       const struct rte_event_dev_config_v20 *dev_conf);
+
+int
+rte_event_dev_configure_v21(uint8_t dev_id,
+                       const struct rte_event_dev_config *dev_conf);
 
 /* Event queue specific APIs */
 
@@ -671,6 +805,20 @@ struct rte_event_queue_conf {
 
 /* Event port specific APIs */
 
+/* Event port configuration bitmap flags */
+#define RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL    (1ULL << 0)
+/**< Configure the port not to release outstanding events in
+ * rte_event_dev_dequeue_burst(). If set, all events received through
+ * the port must be explicitly released with RTE_EVENT_OP_RELEASE or
+ * RTE_EVENT_OP_FORWARD. Must be unset if the device is not
+ * RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE capable.
+ */
+#define RTE_EVENT_PORT_CFG_SINGLE_LINK         (1ULL << 1)
+/**< This event port links only to a single event queue.
+ *
+ *  @see rte_event_port_setup(), rte_event_port_link()
+ */
+
 /** Event port configuration structure */
 struct rte_event_port_conf {
        int32_t new_event_threshold;
@@ -698,6 +846,36 @@ struct rte_event_port_conf {
         * which previously supplied to rte_event_dev_configure().
         * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable.
         */
+       uint32_t event_port_cfg; /**< Port cfg flags(EVENT_PORT_CFG_) */
+};
+
+/** Event port configuration structure */
+struct rte_event_port_conf_v20 {
+       int32_t new_event_threshold;
+       /**< A backpressure threshold for new event enqueues on this port.
+        * Use for *closed system* event dev where event capacity is limited,
+        * and cannot exceed the capacity of the event dev.
+        * Configuring ports with different thresholds can make higher priority
+        * traffic less likely to  be backpressured.
+        * For example, a port used to inject NIC Rx packets into the event dev
+        * can have a lower threshold so as not to overwhelm the device,
+        * while ports used for worker pools can have a higher threshold.
+        * This value cannot exceed the *nb_events_limit*
+        * which was previously supplied to rte_event_dev_configure().
+        * This should be set to '-1' for *open system*.
+        */
+       uint16_t dequeue_depth;
+       /**< Configure number of bulk dequeues for this event port.
+        * This value cannot exceed the *nb_event_port_dequeue_depth*
+        * which previously supplied to rte_event_dev_configure().
+        * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable.
+        */
+       uint16_t enqueue_depth;
+       /**< Configure number of bulk enqueues for this event port.
+        * This value cannot exceed the *nb_event_port_enqueue_depth*
+        * which previously supplied to rte_event_dev_configure().
+        * Ignored when device is not RTE_EVENT_DEV_CAP_BURST_MODE capable.
+        */
        uint8_t disable_implicit_release;
        /**< Configure the port not to release outstanding events in
         * rte_event_dev_dequeue_burst(). If true, all events received through
@@ -733,6 +911,14 @@ struct rte_event_port_conf {
 rte_event_port_default_conf_get(uint8_t dev_id, uint8_t port_id,
                                struct rte_event_port_conf *port_conf);
 
+int
+rte_event_port_default_conf_get_v20(uint8_t dev_id, uint8_t port_id,
+                               struct rte_event_port_conf_v20 *port_conf);
+
+int
+rte_event_port_default_conf_get_v21(uint8_t dev_id, uint8_t port_id,
+                                     struct rte_event_port_conf *port_conf);
+
 /**
  * Allocate and set up an event port for an event device.
  *
@@ -757,6 +943,14 @@ struct rte_event_port_conf {
 rte_event_port_setup(uint8_t dev_id, uint8_t port_id,
                     const struct rte_event_port_conf *port_conf);
 
+int
+rte_event_port_setup_v20(uint8_t dev_id, uint8_t port_id,
+                          const struct rte_event_port_conf_v20 *port_conf);
+
+int
+rte_event_port_setup_v21(uint8_t dev_id, uint8_t port_id,
+                          const struct rte_event_port_conf *port_conf);
+
 /**
  * The queue depth of the port on the enqueue side
  */
@@ -769,6 +963,10 @@ struct rte_event_port_conf {
  * The new event threshold of the port
  */
 #define RTE_EVENT_PORT_ATTR_NEW_EVENT_THRESHOLD 2
+/**
+ * The implicit release disable attribute of the port
+ */
+#define RTE_EVENT_PORT_ATTR_IMPLICIT_RELEASE_DISABLE 3
 
 /**
  * Get an attribute from a port.
diff --git a/lib/librte_eventdev/rte_eventdev_pmd_pci.h 
b/lib/librte_eventdev/rte_eventdev_pmd_pci.h
index 443cd38..1572999 100644
--- a/lib/librte_eventdev/rte_eventdev_pmd_pci.h
+++ b/lib/librte_eventdev/rte_eventdev_pmd_pci.h
@@ -88,6 +88,60 @@
        return -ENXIO;
 }
 
+/**
+ * @internal
+ * Wrapper for use by pci drivers as a .probe function to attach to a event
+ * interface.  Same as rte_event_pmd_pci_probe, except caller can specify
+ * the name.
+ */
+static inline int
+rte_event_pmd_pci_probe_named(struct rte_pci_driver *pci_drv,
+                           struct rte_pci_device *pci_dev,
+                           size_t private_data_size,
+                           eventdev_pmd_pci_callback_t devinit,
+                           const char *name)
+{
+       struct rte_eventdev *eventdev;
+
+       int retval;
+
+       if (devinit == NULL)
+               return -EINVAL;
+
+       eventdev = rte_event_pmd_allocate(name,
+                        pci_dev->device.numa_node);
+       if (eventdev == NULL)
+               return -ENOMEM;
+
+       if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+               eventdev->data->dev_private =
+                               rte_zmalloc_socket(
+                                               "eventdev private structure",
+                                               private_data_size,
+                                               RTE_CACHE_LINE_SIZE,
+                                               rte_socket_id());
+
+               if (eventdev->data->dev_private == NULL)
+                       rte_panic("Cannot allocate memzone for private "
+                                       "device data");
+       }
+
+       eventdev->dev = &pci_dev->device;
+
+       /* Invoke PMD device initialization function */
+       retval = devinit(eventdev);
+       if (retval == 0)
+               return 0;
+
+       RTE_EDEV_LOG_ERR("driver %s: (vendor_id=0x%x device_id=0x%x)"
+                       " failed", pci_drv->driver.name,
+                       (unsigned int) pci_dev->id.vendor_id,
+                       (unsigned int) pci_dev->id.device_id);
+
+       rte_event_pmd_release(eventdev);
+
+       return -ENXIO;
+}
 
 /**
  * @internal
diff --git a/lib/librte_eventdev/rte_eventdev_version.map 
b/lib/librte_eventdev/rte_eventdev_version.map
index 91a62cd..081fcb6 100644
--- a/lib/librte_eventdev/rte_eventdev_version.map
+++ b/lib/librte_eventdev/rte_eventdev_version.map
@@ -94,13 +94,21 @@ DPDK_20.0 {
        local: *;
 };
 
+DPDK_21 {
+        global:
+
+       rte_event_dev_info_get;
+       rte_event_dev_configure;
+       rte_event_port_default_conf_get;
+       rte_event_port_setup;
+} DPDK_20.0;
+
 EXPERIMENTAL {
        global:
 
        # added in 20.05
        __rte_eventdev_trace_configure;
        __rte_eventdev_trace_queue_setup;
-       __rte_eventdev_trace_port_setup;
        __rte_eventdev_trace_port_link;
        __rte_eventdev_trace_port_unlink;
        __rte_eventdev_trace_start;
@@ -134,4 +142,7 @@ EXPERIMENTAL {
        __rte_eventdev_trace_crypto_adapter_queue_pair_del;
        __rte_eventdev_trace_crypto_adapter_start;
        __rte_eventdev_trace_crypto_adapter_stop;
+
+       # changed in 20.08
+       __rte_eventdev_trace_port_setup;
 };
-- 
1.7.10

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