event/dlb2: add support for independent enqueue

DLB devices need events to be enqueued in the same order they are
dequeued. Applications are not suppose to change event order between
dequeue and to enqueue. Since Eventdev standard does not add such
restrictions independent enqueue support is needed for DLB PMD so that
it restores dequeue order on enqueue if applications happen to change
it. It also adds missing releases in places where events are dropped
by the application and it expects implicit release to handle it.

By default the feature will be off on all DLB ports and they will
behave the same as older releases. To enable reordering feature,
applications need to add the flag RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ
to port configuration if only the device advertises the capability
RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ.

Signed-off-by: Abdullah Sevincer <[email protected]>
Acked-by: Mattias Rönnblom <[email protected]>

Author: asevince

doc/guides/eventdevs/features/dlb2.ini

@@ -15,6 +15,7 @@ implicit_release_disable   = Y
 runtime_port_link          = Y
 multiple_queue_port        = Y
 maintenance_free           = Y
+independent_enq            = Y
 
 [Eth Rx adapter Features]
 

doc/guides/rel_notes/release_24_11.rst

@@ -75,6 +75,8 @@ New Features
     Applications should  use ``RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ`` to enable
     the feature if the capability  ``RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ`` exists.
 
+  * Updated DLB2 driver for independent enqueue feature.
+
 
 Removed Items
 -------------