[v14,1/3] eventdev: add support for independent enqueue

This commit adds support for independent enqueue feature
and updates Event Device and PMD feature list.

A new capability RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ is introduced. It
allows out-of-order enqueuing of RTE_EVENT_OP_FORWARD or RELEASE type
events on an event port where this capability is enabled.

To use this capability applications need to set flag
RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ during port setup only if the
capability RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ exists.

Signed-off-by: Abdullah Sevincer <abdullah.sevincer@intel.com>
Acked-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
---
 doc/guides/eventdevs/features/default.ini |  1 +
 doc/guides/eventdevs/features/dlb2.ini    |  1 +
 doc/guides/rel_notes/release_24_11.rst    |  5 +++
 lib/eventdev/rte_eventdev.h               | 37 +++++++++++++++++++++++
 4 files changed, 44 insertions(+)
  

On Fri, Oct 4, 2024 at 2:20 AM Abdullah Sevincer
<abdullah.sevincer@intel.com> wrote:
>
> This commit adds support for independent enqueue feature

Remove "This commit adds"

> and updates Event Device and PMD feature list.
>
> A new capability RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ is introduced. It
> allows out-of-order enqueuing of RTE_EVENT_OP_FORWARD or RELEASE type
> events on an event port where this capability is enabled.
>
> To use this capability applications need to set flag
> RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ during port setup only if the
> capability RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ exists.
>
> Signed-off-by: Abdullah Sevincer <abdullah.sevincer@intel.com>
> Acked-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
> ---
>  doc/guides/eventdevs/features/default.ini |  1 +
>  doc/guides/eventdevs/features/dlb2.ini    |  1 +
>  doc/guides/rel_notes/release_24_11.rst    |  5 +++
>  lib/eventdev/rte_eventdev.h               | 37 +++++++++++++++++++++++
>  4 files changed, 44 insertions(+)
>
> diff --git a/doc/guides/eventdevs/features/default.ini b/doc/guides/eventdevs/features/default.ini
> index 1cc4303fe5..7c4ee99238 100644
> --- a/doc/guides/eventdevs/features/default.ini
> +++ b/doc/guides/eventdevs/features/default.ini
> @@ -22,6 +22,7 @@ carry_flow_id              =
>  maintenance_free           =
>  runtime_queue_attr         =
>  profile_links              =
> +independent_enq            =
>
>  ;
>  ; Features of a default Ethernet Rx adapter.
> diff --git a/doc/guides/eventdevs/features/dlb2.ini b/doc/guides/eventdevs/features/dlb2.ini
> index 7b80286927..c7193b47c1 100644
> --- a/doc/guides/eventdevs/features/dlb2.ini
> +++ b/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]
>
> diff --git a/doc/guides/rel_notes/release_24_11.rst b/doc/guides/rel_notes/release_24_11.rst
> index e0a9aa55a1..dee6723b70 100644
> --- a/doc/guides/rel_notes/release_24_11.rst
> +++ b/doc/guides/rel_notes/release_24_11.rst
> @@ -67,6 +67,11 @@ New Features
>
>    The new statistics are useful for debugging and profiling.
>
> +* **Updated Event Device Library for independent enqueue feature**
> +
> +  * Added support for independent enqueue feature. Updated Event Device and
> +    PMD feature list.

No need to add "Updated Event Device and PMD feature list." Instead,
very short summary of features
can be added here.


> +
>
>  Removed Items
>  -------------
> diff --git a/lib/eventdev/rte_eventdev.h b/lib/eventdev/rte_eventdev.h
> index 08e5f9320b..3e3142d4a6 100644
> --- a/lib/eventdev/rte_eventdev.h
> +++ b/lib/eventdev/rte_eventdev.h
> @@ -446,6 +446,31 @@ struct rte_event;
>   * @see RTE_SCHED_TYPE_PARALLEL
>   */
>
> +#define RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ  (1ULL << 16)
> +/**< Event device is capable of independent enqueue.
> + * A new capability, RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ, will indicate that Eventdev
> + * supports the enqueue in any order or specifically in a different order than the
> + * dequeue. Eventdev PMD can either transmit events in the changed order in which
> + * they are enqueued or restore the original order before sending them to the
> + * underlying hardware device. A flag is provided during the port configuration to
> + * inform Eventdev PMD that the application intends to use an independent enqueue
> + * order on a particular port. Note that this capability only matters for Eventdevs
> + * supporting burst mode.
> + *

----------- see below---
> + * To Inform PMD that the application plans to use independent enqueue order on a port
> + * this code example can be used:
> + *
> + *  if (capability & RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ)
> + *     port_config = port_config | RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ;

--------------------------

Above section, please move to programming guide, no need to add code
in Doxygen comments.

> + *
> + * When an implicit release is enabled on a port, Eventdev PMD will also handle
> + * the insertion of RELEASE events in place of dropped events. The independent enqueue
> + * feature only applies to FORWARD and RELEASE events. New events (op=RTE_EVENT_OP_NEW)
> + * will be transmitted in the order the application enqueues them and do not maintain

transmitted -> dequeded?

> + * any order relative to FORWARD/RELEASE events. FORWARD vs NEW relaxed ordering
> + * only applies to ports that have enabled independent enqueue feature.
> + */
> +
>  /* Event device priority levels */
>  #define RTE_EVENT_DEV_PRIORITY_HIGHEST   0
>  /**< Highest priority level for events and queues.
> @@ -1072,6 +1097,18 @@ rte_event_queue_attr_set(uint8_t dev_id, uint8_t queue_id, uint32_t attr_id,
>   *
>   *  @see rte_event_port_setup()
>   */
> +#define RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ   (1ULL << 5)
> +/**< Flag to enable independent enqueue. Must not be set if the device
> + * is not RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ capable. This feature
> + * allows an application to enqueue RTE_EVENT_OP_FORWARD or
> + * RTE_EVENT_OP_RELEASE in an order different than the order the
> + * events were dequeued from the event device, while maintaining
> + * RTE_SCHED_TYPE_ATOMIC or RTE_SCHED_TYPE_ORDERED semantics.
> + *
> + * Note that this flag only matters for Eventdevs supporting burst mode.
> + *
> + *  @see rte_event_port_setup()
> + */
>
>  /** Event port configuration structure */
>  struct rte_event_port_conf {
> --
> 2.25.1
>