[RFC] ethdev: fast path async flow API

[Stephen Hemminger]

On Wed, 27 Dec 2023 12:57:09 +0200
Dariusz Sosnowski <dsosnowski at nvidia.com> wrote:

> +/**
> + * @internal
> + *
> + * Fast path async flow functions and related data are held in a flat array, one entry per ethdev.
> + * It is assumed that each entry is read-only and cache aligned.
> + */
> +struct rte_flow_fp_ops {
> +	void *ctx;
> +	rte_flow_async_create_t async_create;
> +	rte_flow_async_create_by_index_t async_create_by_index;
> +	rte_flow_async_actions_update_t async_actions_update;
> +	rte_flow_async_destroy_t async_destroy;
> +	rte_flow_push_t push;
> +	rte_flow_pull_t pull;
> +	rte_flow_async_action_handle_create_t async_action_handle_create;
> +	rte_flow_async_action_handle_destroy_t async_action_handle_destroy;
> +	rte_flow_async_action_handle_update_t async_action_handle_update;
> +	rte_flow_async_action_handle_query_t async_action_handle_query;
> +	rte_flow_async_action_handle_query_update_t async_action_handle_query_update;
> +	rte_flow_async_action_list_handle_create_t async_action_list_handle_create;
> +	rte_flow_async_action_list_handle_destroy_t async_action_list_handle_destroy;
> +	rte_flow_async_action_list_handle_query_update_t async_action_list_handle_query_update;
> +} __rte_cache_aligned;

If you go ahead with this then all usage should be const pointer.
Still think it is bad idea and creates even more technical debt.