[dpdk-dev] [PATCH v4] ethdev: add IPv4 and L4 checksum RSS offload types

[Andrew Rybchenko]

On 7/13/21 4:13 AM, Alvin Zhang wrote:
> This patch defines new RSS offload types for IPv4 and
> L4(TCP/UDP/SCTP) checksum, which are required when users want
> to distribute packets based on the IPv4 or L4 checksum field.
> 
> For example "flow create 0 ingress pattern eth / ipv4 / end
> actions rss types ipv4-chksum end queues end / end", this flow
> causes all matching packets to be distributed to queues on
> basis of IPv4 checksum.
> 
> Signed-off-by: Alvin Zhang <alvinx.zhang at intel.com>
> Reviewed-by: Andrew Rybchenko <andrew.rybchenko at oktetlabs.ru>

I've failed to find mail where I've added the tag. I've replied
with "LGTM" for v2 which has IPv4 checksum only and many
comments on L4 checksum added in v3. So, I think it is
incorrect to inherit "LGTM" as Reviewed-by.

> Acked-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
> Acked-by: Aman Deep Singh <aman.deep.singh at intel.com>
> ---
> 
> v3: Add L4 checksum RSS offload type
> v4: Add doc and help string, update commit log
> ---
>  app/test-pmd/cmdline.c  | 12 +++++++++---
>  app/test-pmd/config.c   |  2 ++
>  lib/ethdev/rte_ethdev.h |  2 ++
>  3 files changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
> index 0268b18..93543d8 100644
> --- a/app/test-pmd/cmdline.c
> +++ b/app/test-pmd/cmdline.c
> @@ -2254,6 +2254,10 @@ struct cmd_config_rss {
>  		rss_conf.rss_hf = ETH_RSS_ECPRI;
>  	else if (!strcmp(res->value, "mpls"))
>  		rss_conf.rss_hf = ETH_RSS_MPLS;
> +	else if (!strcmp(res->value, "ipv4-chksum"))
> +		rss_conf.rss_hf = ETH_RSS_IPV4_CHKSUM;
> +	else if (!strcmp(res->value, "l4-chksum"))
> +		rss_conf.rss_hf = ETH_RSS_L4_CHKSUM;
>  	else if (!strcmp(res->value, "none"))
>  		rss_conf.rss_hf = 0;
>  	else if (!strcmp(res->value, "level-default")) {
> @@ -2325,7 +2329,7 @@ struct cmd_config_rss {
>  	.help_str = "port config all rss "
>  		"all|default|eth|vlan|ip|tcp|udp|sctp|ether|port|vxlan|geneve|"
>  		"nvgre|vxlan-gpe|l2tpv3|esp|ah|pfcp|ecpri|mpls|none|level-default|"
> -		"level-outer|level-inner|<flowtype_id>",
> +		"level-outer|level-inner|ipv4-chksum|l4-chksum|<flowtype_id>",
>  	.tokens = {
>  		(void *)&cmd_config_rss_port,
>  		(void *)&cmd_config_rss_keyword,
> @@ -2438,7 +2442,8 @@ struct cmd_config_rss_hash_key {
>  				 "ipv6-tcp-ex#ipv6-udp-ex#"
>  				 "l3-src-only#l3-dst-only#l4-src-only#l4-dst-only#"
>  				 "l2-src-only#l2-dst-only#s-vlan#c-vlan#"
> -				 "l2tpv3#esp#ah#pfcp#pppoe#gtpu#ecpri#mpls");
> +				 "l2tpv3#esp#ah#pfcp#pppoe#gtpu#ecpri#mpls#"
> +				 "ipv4-chksum#l4-chksum");
>  cmdline_parse_token_string_t cmd_config_rss_hash_key_value =
>  	TOKEN_STRING_INITIALIZER(struct cmd_config_rss_hash_key, key, NULL);
>  
> @@ -2451,7 +2456,8 @@ struct cmd_config_rss_hash_key {
>  		"l2-payload|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|"
>  		"l3-src-only|l3-dst-only|l4-src-only|l4-dst-only|"
>  		"l2-src-only|l2-dst-only|s-vlan|c-vlan|"
> -		"l2tpv3|esp|ah|pfcp|pppoe|gtpu|ecpri|mpls "
> +		"l2tpv3|esp|ah|pfcp|pppoe|gtpu|ecpri|mpls|"
> +		"ipv4-chksum|l4-chksum "
>  		"<string of hex digits (variable length, NIC dependent)>",
>  	.tokens = {
>  		(void *)&cmd_config_rss_hash_key_port,
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
> index 43c79b5..14968bf 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -140,6 +140,8 @@
>  	{ "gtpu", ETH_RSS_GTPU },
>  	{ "ecpri", ETH_RSS_ECPRI },
>  	{ "mpls", ETH_RSS_MPLS },
> +	{ "ipv4-chksum", ETH_RSS_IPV4_CHKSUM },
> +	{ "l4-chksum", ETH_RSS_L4_CHKSUM },
>  	{ NULL, 0 },
>  };
>  
> diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
> index faf3bd9..63b0321 100644
> --- a/lib/ethdev/rte_ethdev.h
> +++ b/lib/ethdev/rte_ethdev.h
> @@ -537,6 +537,8 @@ struct rte_eth_rss_conf {
>  #define ETH_RSS_PPPOE		   (1ULL << 31)
>  #define ETH_RSS_ECPRI		   (1ULL << 32)
>  #define ETH_RSS_MPLS		   (1ULL << 33)
> +#define ETH_RSS_IPV4_CHKSUM	   (1ULL << 34)
> +#define ETH_RSS_L4_CHKSUM	   (1ULL << 35)	/* TCP/UDP/SCTP */

It does not reply on my questions at all.

Nack