[RFC 1/2] ethdev: port flags for pre-configuration flow hints

[Xiaoyu Min <jackmin@nvidia.com>]

The data-path focused flow rule management can manage flow rules in more
optimized way then tranditional one by using hits provided by
application in initialization phase.

In addition to the current hints we have in port attr, more hints could
be proivded by application about it's behaviour.

One example is how the application do with the same flow:
A. create/destroy flow on same queue but query flow on different queue
   or queue-less way (i.e, counter query)
B. All flow operations will be exactly on the same queue, by which PMD
   could be in more optimized way then A because resource could be
   isolated and access based on queue, without lock for example.

This patch add flag about above situation and could be extanded to cover
more situations.

Signed-off-by: Xiaoyu Min <jackmin@nvidia.com>
---
 lib/ethdev/rte_flow.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
index d8827dd184..578dd837f5 100644
--- a/lib/ethdev/rte_flow.h
+++ b/lib/ethdev/rte_flow.h
@@ -4875,6 +4875,17 @@ rte_flow_flex_item_release(uint16_t port_id,
 			   const struct rte_flow_item_flex_handle *handle,
 			   struct rte_flow_error *error);
 
+/**
+ * The flags of rte flow port
+ */
+enum rte_flow_port_flag {
+	/**
+	 * All flow operations for one specified flow will _strictlly_ happen
+	 * on the same queue (create/destroy/query/update).
+	 */
+	RTE_FLOW_PORT_FLAG_STRICT_QUEUE = RTE_BIT32(0),
+};
+
 /**
  * @warning
  * @b EXPERIMENTAL: this API may change without prior notice.
@@ -4972,6 +4983,11 @@ struct rte_flow_port_attr {
 	 * @see RTE_FLOW_ACTION_TYPE_METER
 	 */
 	uint32_t nb_meters;
+	/**
+	 * Port flags.
+	 * @see enum rte_flow_port_flag
+	 */
+	enum rte_flow_port_flag flags;
 };
 
 /**
-- 
2.35.1