[RFC] ethdev: add async flow connection tracking configuration

[Suanming Mou]

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> -----Original Message-----
> From: Suanming Mou <suanmingm at nvidia.com>
> Sent: Tuesday, August 9, 2022 9:26 PM
> To: dev at dpdk.org
> Cc: Ori Kam <orika at nvidia.com>; Xiaoyun Li <xiaoyun.li at intel.com>; Aman
> Singh <aman.deep.singh at intel.com>; Yuying Zhang <yuying.zhang at intel.com>;
> NBU-Contact-Thomas Monjalon (EXTERNAL) <thomas at monjalon.net>; Ferruh
> Yigit <ferruh.yigit at xilinx.com>; Andrew Rybchenko
> <andrew.rybchenko at oktetlabs.ru>
> Subject: [RFC] ethdev: add async flow connection tracking configuration
> 
> In queue based async flow engine, in order to optimize the flow insertion rate,
> PMD can use the hints from application to have resources pre-allocate during
> initialization phase for actions such as count/meter/aging.
> 
> This commit adds the connection tracking action hints.
> 
> Signed-off-by: Suanming Mou <suanmingm at nvidia.com>
> ---
>  app/test-pmd/cmdline_flow.c            | 10 ++++++++++
>  doc/guides/rel_notes/release_22_11.rst |  6 ++++++
>  lib/ethdev/rte_flow.h                  | 10 ++++++++++
>  3 files changed, 26 insertions(+)
> 
> diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c index
> 7f50028eb7..c9cbf381c4 100644
> --- a/app/test-pmd/cmdline_flow.c
> +++ b/app/test-pmd/cmdline_flow.c
> @@ -219,6 +219,7 @@ enum index {
>  	CONFIG_COUNTERS_NUMBER,
>  	CONFIG_AGING_OBJECTS_NUMBER,
>  	CONFIG_METERS_NUMBER,
> +	CONFIG_CONN_TRACK_NUMBER,
> 
>  	/* Indirect action arguments */
>  	INDIRECT_ACTION_CREATE,
> @@ -1081,6 +1082,7 @@ static const enum index next_config_attr[] = {
>  	CONFIG_COUNTERS_NUMBER,
>  	CONFIG_AGING_OBJECTS_NUMBER,
>  	CONFIG_METERS_NUMBER,
> +	CONFIG_CONN_TRACK_NUMBER,
>  	END,
>  	ZERO,
>  };
> @@ -2667,6 +2669,14 @@ static const struct token token_list[] = {
>  		.args = ARGS(ARGS_ENTRY(struct buffer,
>  					args.configure.port_attr.nb_meters)),
>  	},
> +	[CONFIG_CONN_TRACK_NUMBER] = {
> +		.name = "conn_tracks_number",
> +		.help = "number of connection trackings",
> +		.next = NEXT(next_config_attr,
> +			     NEXT_ENTRY(COMMON_UNSIGNED)),
> +		.args = ARGS(ARGS_ENTRY(struct buffer,
> +
> 	args.configure.port_attr.nb_conn_tracks)),
> +	},
>  	/* Top-level command. */
>  	[PATTERN_TEMPLATE] = {
>  		.name = "pattern_template",
> diff --git a/doc/guides/rel_notes/release_22_11.rst
> b/doc/guides/rel_notes/release_22_11.rst
> index 8c021cf050..c396bfca5f 100644
> --- a/doc/guides/rel_notes/release_22_11.rst
> +++ b/doc/guides/rel_notes/release_22_11.rst
> @@ -55,6 +55,12 @@ New Features
>       Also, make sure to start the actual text at the margin.
>       =======================================================
> 
> +* **Added configuration for asynchronous flow connection tracking.**
> +
> +  Added connection tracking action number hint to
> + ``rte_flow_configure``  and ``rte_flow_info_get``.
> +  PMD can prepare the connection tracking resources accroding to the hint.
> +
> 
>  Removed Items
>  -------------
> diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h index
> a79f1e7ef0..c2747abc55 100644
> --- a/lib/ethdev/rte_flow.h
> +++ b/lib/ethdev/rte_flow.h
> @@ -4902,6 +4902,11 @@ struct rte_flow_port_info {
>  	 * @see RTE_FLOW_ACTION_TYPE_METER
>  	 */
>  	uint32_t max_nb_meters;
> +	/**
> +	 * Maximum number connection trackings.
> +	 * @see RTE_FLOW_ACTION_TYPE_CONNTRACK
> +	 */
> +	uint32_t max_nb_conn_tracks;
>  };
> 
>  /**
> @@ -4971,6 +4976,11 @@ struct rte_flow_port_attr {
>  	 * @see RTE_FLOW_ACTION_TYPE_METER
>  	 */
>  	uint32_t nb_meters;
> +	/**
> +	 * Number of connection trackings to configure.
> +	 * @see RTE_FLOW_ACTION_TYPE_CONNTRACK
> +	 */
> +	uint32_t nb_conn_tracks;
>  };
> 
>  /**
> --
> 2.25.1