[PATCH v3] ethdev: fast path async flow API

[Thomas Monjalon]

06/02/2024 18:36, Dariusz Sosnowski:
> --- a/doc/guides/nics/build_and_test.rst
> +++ b/doc/guides/nics/build_and_test.rst
> +- ``RTE_FLOW_DEBUG`` (default **disabled**; enabled automatically on debug builds)
> +
> +  Build with debug code in asynchronous flow APIs.
> +
>  .. Note::
> 
> -   The ethdev library use above options to wrap debug code to trace invalid parameters
> +   The ethdev library uses above options to wrap debug code to trace invalid parameters
>     on data path APIs, so performance downgrade is expected when enabling those options.
> -   Each PMD can decide to reuse them to wrap their own debug code in the Rx/Tx path.
> +   Each PMD can decide to reuse them to wrap their own debug code in the Rx/Tx path
> +   and in asynchronous flow APIs implementation.

Good

> --- a/doc/guides/rel_notes/release_24_03.rst
> +++ b/doc/guides/rel_notes/release_24_03.rst
> +* ethdev: PMDs implementing asynchronous flow operations are required to provide relevant functions
> +  implementation through ``rte_flow_fp_ops`` struct, instead of ``rte_flow_ops`` struct.
> +  Pointer to device-dependent ``rte_flow_fp_ops`` should be provided to ``rte_eth_dev.flow_fp_ops``.

That's a change only for the driver.
If there is no change for the application, it should not appear in the release notes.
BTW, API means Application Programming Interface :)

> +  This change applies to the following API functions:
> +
> +   * ``rte_flow_async_create``
> +   * ``rte_flow_async_create_by_index``
> +   * ``rte_flow_async_actions_update``
> +   * ``rte_flow_async_destroy``
> +   * ``rte_flow_push``
> +   * ``rte_flow_pull``
> +   * ``rte_flow_async_action_handle_create``
> +   * ``rte_flow_async_action_handle_destroy``
> +   * ``rte_flow_async_action_handle_update``
> +   * ``rte_flow_async_action_handle_query``
> +   * ``rte_flow_async_action_handle_query_update``
> +   * ``rte_flow_async_action_list_handle_create``
> +   * ``rte_flow_async_action_list_handle_destroy``
> +   * ``rte_flow_async_action_list_handle_query_update``
> +
> +* ethdev: Removed the following fields from ``rte_flow_ops`` struct:
> +
> +   * ``async_create``
> +   * ``async_create_by_index``
> +   * ``async_actions_update``
> +   * ``async_destroy``
> +   * ``push``
> +   * ``pull``
> +   * ``async_action_handle_create``
> +   * ``async_action_handle_destroy``
> +   * ``async_action_handle_update``
> +   * ``async_action_handle_query``
> +   * ``async_action_handle_query_update``
> +   * ``async_action_list_handle_create``
> +   * ``async_action_list_handle_destroy``
> +   * ``async_action_list_handle_query_update``

[...]
> --- a/lib/ethdev/ethdev_driver.h
> +++ b/lib/ethdev/ethdev_driver.h
> @@ -71,6 +71,10 @@ struct rte_eth_dev {
>  	struct rte_eth_dev_data *data;
>  	void *process_private; /**< Pointer to per-process device data */
>  	const struct eth_dev_ops *dev_ops; /**< Functions exported by PMD */
> +	/**
> +	 * Fast path flow API functions exported by PMD.
> +	 */

This comment may be on one single line.

> +	const struct rte_flow_fp_ops *flow_fp_ops;
>  	struct rte_device *device; /**< Backing device */
>  	struct rte_intr_handle *intr_handle; /**< Device interrupt handle */

> --- a/lib/ethdev/meson.build
> +++ b/lib/ethdev/meson.build
> +if get_option('buildtype').contains('debug')
> +    cflags += ['-DRTE_FLOW_DEBUG']
> +endif

This looks OK.

Acked-by: Thomas Monjalon <thomas at monjalon.net>