[PATCH v2] net/ice: fix how ice driver handles flows

[Vladimir Medvedkin <vladimir.medvedkin@intel.com>]

Currently ICE PMD uses group attribute to select the appropriate HW engine
to offload the flow. This behavior violates the rte_flow API, existing
documentation/examples, and reveals hardware specific details.

This patch eliminates the use of the group attribute and runs each engine
parser in the order they work in the HW pipeline.

Fixes: 9c5f0070fa3f ("net/ice: map group to pipeline stage")
Cc: qi.z.zhang@intel.com
Cc: stable@dpdk.org

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
---
 drivers/net/intel/ice/ice_generic_flow.c | 30 ++++++++++++++----------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/drivers/net/intel/ice/ice_generic_flow.c b/drivers/net/intel/ice/ice_generic_flow.c
index 50d760004f..5c34e0385f 100644
--- a/drivers/net/intel/ice/ice_generic_flow.c
+++ b/drivers/net/intel/ice/ice_generic_flow.c
@@ -20,6 +20,8 @@
 
 #define ICE_FLOW_ENGINE_DISABLED(mask, type) ((mask) & BIT(type))
 
+#define ICE_FLOW_ENGINE_NB	3
+
 static struct ice_engine_list engine_list =
 		TAILQ_HEAD_INITIALIZER(engine_list);
 
@@ -2295,21 +2297,23 @@ ice_flow_process_filter(struct rte_eth_dev *dev,
 		return 0;
 	}
 
-	parser = get_flow_parser(attr->group);
-	if (parser == NULL) {
-		rte_flow_error_set(error, EINVAL,
-				   RTE_FLOW_ERROR_TYPE_ATTR,
-				   NULL, "NULL attribute.");
-		return -rte_errno;
-	}
+	for (int i = 0; i < ICE_FLOW_ENGINE_NB; i++) {
+		parser = get_flow_parser(i);
+		if (parser == NULL) {
+			rte_flow_error_set(error, EINVAL,
+					RTE_FLOW_ERROR_TYPE_ATTR,
+					NULL, "NULL attribute.");
+			return -rte_errno;
+		}
 
-	if (ice_parse_engine(ad, flow, parser, attr->priority,
-			     pattern, actions, error)) {
-		*engine = parser->engine;
-		return 0;
-	} else {
-		return -rte_errno;
+		if (ice_parse_engine(ad, flow, parser, attr->priority,
+				pattern, actions, error)) {
+			*engine = parser->engine;
+			return 0;
+		}
 	}
+
+	return -rte_errno;
 }
 
 static int
-- 
2.43.0