[v1] net/ice: refine flow priority support in PF

  The usage of priority is converse in pipeline mode and
non-pipeline mode. Refine attribute priority support of flow
filter in PF driver. When priority is 0, rules are created in
switch filter first and FDIR is used as backup. When priority
is 1, rules are all created in switch filter. Other filters
don't support priority 1. Value 0 denotes higher priority.

Signed-off-by: Yuying Zhang <yuying.zhang@intel.com>
---
 drivers/net/ice/ice_acl_filter.c    | 5 ++++-
 drivers/net/ice/ice_fdir_filter.c   | 5 ++++-
 drivers/net/ice/ice_generic_flow.c  | 4 ++--
 drivers/net/ice/ice_hash.c          | 5 ++++-
 drivers/net/ice/ice_switch_filter.c | 2 +-
 5 files changed, 15 insertions(+), 6 deletions(-)
  

> -----Original Message-----
> From: Zhang, Yuying <yuying.zhang@intel.com>
> Sent: Monday, August 30, 2021 1:30 PM
> To: dev@dpdk.org; Zhang, Qi Z <qi.z.zhang@intel.com>
> Cc: Zhang, Yuying <yuying.zhang@intel.com>
> Subject: [PATCH v1] net/ice: refine flow priority support in PF
> 
> The usage of priority is converse in pipeline mode and non-pipeline mode.
> Refine attribute priority support of flow filter in PF driver. When priority is 0,
> rules are created in switch filter first and FDIR is used as backup. When priority
> is 1, rules are all created in switch filter. Other filters don't support priority 1.
> Value 0 denotes higher priority.
> 
> Signed-off-by: Yuying Zhang <yuying.zhang@intel.com>
> ---
>  drivers/net/ice/ice_acl_filter.c    | 5 ++++-
>  drivers/net/ice/ice_fdir_filter.c   | 5 ++++-
>  drivers/net/ice/ice_generic_flow.c  | 4 ++--
>  drivers/net/ice/ice_hash.c          | 5 ++++-
>  drivers/net/ice/ice_switch_filter.c | 2 +-
>  5 files changed, 15 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/ice/ice_acl_filter.c b/drivers/net/ice/ice_acl_filter.c
> index 0c15a7036c..614bd44e23 100644
> --- a/drivers/net/ice/ice_acl_filter.c
> +++ b/drivers/net/ice/ice_acl_filter.c
> @@ -904,7 +904,7 @@ ice_acl_parse(struct ice_adapter *ad,
>  	       uint32_t array_len,
>  	       const struct rte_flow_item pattern[],
>  	       const struct rte_flow_action actions[],
> -	       uint32_t priority __rte_unused,
> +	       uint32_t priority,
>  	       void **meta,
>  	       struct rte_flow_error *error)
>  {
> @@ -914,6 +914,9 @@ ice_acl_parse(struct ice_adapter *ad,
>  	uint64_t input_set;
>  	int ret;
> 
> +	if (priority >= 1)
> +		return -rte_errno;
> +
>  	memset(filter, 0, sizeof(*filter));
>  	item = ice_search_pattern_match_item(ad, pattern, array, array_len,
>  					     error);
> diff --git a/drivers/net/ice/ice_fdir_filter.c b/drivers/net/ice/ice_fdir_filter.c
> index 7ba65b9b04..c9f833c5c9 100644
> --- a/drivers/net/ice/ice_fdir_filter.c
> +++ b/drivers/net/ice/ice_fdir_filter.c
> @@ -2194,7 +2194,7 @@ ice_fdir_parse(struct ice_adapter *ad,
>  	       uint32_t array_len,
>  	       const struct rte_flow_item pattern[],
>  	       const struct rte_flow_action actions[],
> -	       uint32_t priority __rte_unused,
> +	       uint32_t priority,
>  	       void **meta,
>  	       struct rte_flow_error *error)
>  {
> @@ -2204,6 +2204,9 @@ ice_fdir_parse(struct ice_adapter *ad,
>  	uint64_t input_set;
>  	int ret;
> 
> +	if (priority >= 1)
> +		return -rte_errno;
> +
>  	memset(filter, 0, sizeof(*filter));
>  	item = ice_search_pattern_match_item(ad, pattern, array, array_len,
>  					     error);
> diff --git a/drivers/net/ice/ice_generic_flow.c
> b/drivers/net/ice/ice_generic_flow.c
> index c2fa75f165..1d557a05f4 100644
> --- a/drivers/net/ice/ice_generic_flow.c
> +++ b/drivers/net/ice/ice_generic_flow.c
> @@ -1923,9 +1923,9 @@ ice_register_parser(struct ice_flow_parser *parser,
>  	} else {
>  		if (parser->engine->type == ICE_FLOW_ENGINE_SWITCH ||
>  				parser->engine->type == ICE_FLOW_ENGINE_HASH)
> -			TAILQ_INSERT_TAIL(list, parser_node, node);
> -		else if (parser->engine->type == ICE_FLOW_ENGINE_FDIR)
>  			TAILQ_INSERT_HEAD(list, parser_node, node);
> +		else if (parser->engine->type == ICE_FLOW_ENGINE_FDIR)
> +			TAILQ_INSERT_TAIL(list, parser_node, node);
>  		else if (parser->engine->type == ICE_FLOW_ENGINE_ACL)
>  			TAILQ_INSERT_HEAD(list, parser_node, node);
>  		else
> diff --git a/drivers/net/ice/ice_hash.c b/drivers/net/ice/ice_hash.c index
> 54d14dfcdd..175780c9ff 100644
> --- a/drivers/net/ice/ice_hash.c
> +++ b/drivers/net/ice/ice_hash.c
> @@ -1034,7 +1034,7 @@ ice_hash_parse_pattern_action(__rte_unused
> struct ice_adapter *ad,
>  			uint32_t array_len,
>  			const struct rte_flow_item pattern[],
>  			const struct rte_flow_action actions[],
> -			uint32_t priority __rte_unused,
> +			uint32_t priority,
>  			void **meta,
>  			struct rte_flow_error *error)
>  {
> @@ -1043,6 +1043,9 @@ ice_hash_parse_pattern_action(__rte_unused
> struct ice_adapter *ad,
>  	struct ice_rss_meta *rss_meta_ptr;
>  	uint64_t phint = ICE_PHINT_NONE;
> 
> +	if (priority >= 1)
> +		return -rte_errno;
> +
>  	rss_meta_ptr = rte_zmalloc(NULL, sizeof(*rss_meta_ptr), 0);
>  	if (!rss_meta_ptr) {
>  		rte_flow_error_set(error, EINVAL,
> diff --git a/drivers/net/ice/ice_switch_filter.c
> b/drivers/net/ice/ice_switch_filter.c
> index f222cb9cb0..28f9ae39d5 100644
> --- a/drivers/net/ice/ice_switch_filter.c
> +++ b/drivers/net/ice/ice_switch_filter.c
> @@ -1651,7 +1651,7 @@ ice_switch_parse_action(struct ice_pf *pf,
>  	rule_info->sw_act.vsi_handle = vsi->idx;
>  	rule_info->rx = 1;
>  	rule_info->sw_act.src = vsi->idx;
> -	rule_info->priority = priority + 5;
> +	rule_info->priority = 6 - priority;

I think this is the chance to replace magic number of switch rule priority with macro, and also add some comment here to explain the calculation. 

> 
>  	return 0;
> 
> --
> 2.25.1