[dpdk-dev] [PATCH v4 3/5] ethdev: implement RTE flex item API

[Viacheslav Ovsiienko <viacheslavo@nvidia.com>]

From: Gregory Etelson <getelson@nvidia.com>

RTE flex item API was introduced in
"ethdev: introduce configurable flexible item" patch.

The API allows DPDK application to define parser for custom
network header in port hardware and offload flows that will match
the custom header elements.

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Reviewed-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 lib/ethdev/rte_flow.c        | 40 ++++++++++++++++++++++++++++++++++++
 lib/ethdev/rte_flow_driver.h |  8 ++++++++
 lib/ethdev/version.map       |  4 ++++
 3 files changed, 52 insertions(+)

diff --git a/lib/ethdev/rte_flow.c b/lib/ethdev/rte_flow.c
index 100983ca59..a858dc31e3 100644
--- a/lib/ethdev/rte_flow.c
+++ b/lib/ethdev/rte_flow.c
@@ -1323,3 +1323,43 @@ rte_flow_tunnel_item_release(uint16_t port_id,
 				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
 				  NULL, rte_strerror(ENOTSUP));
 }
+
+struct rte_flow_item_flex_handle *
+rte_flow_flex_item_create(uint16_t port_id,
+			  const struct rte_flow_item_flex_conf *conf,
+			  struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+	struct rte_flow_item_flex_handle *handle;
+
+	if (unlikely(!ops))
+		return NULL;
+	if (unlikely(!ops->flex_item_create)) {
+		rte_flow_error_set(error, ENOTSUP,
+				   RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				   NULL, rte_strerror(ENOTSUP));
+		return NULL;
+	}
+	handle = ops->flex_item_create(dev, conf, error);
+	if (handle == NULL)
+		flow_err(port_id, -rte_errno, error);
+	return handle;
+}
+
+int
+rte_flow_flex_item_release(uint16_t port_id,
+			   const struct rte_flow_item_flex_handle *handle,
+			   struct rte_flow_error *error)
+{
+	int ret;
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (unlikely(!ops || !ops->flex_item_release))
+		return rte_flow_error_set(error, ENOTSUP,
+					  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+					  NULL, rte_strerror(ENOTSUP));
+	ret = ops->flex_item_release(dev, handle, error);
+	return flow_err(port_id, ret, error);
+}
diff --git a/lib/ethdev/rte_flow_driver.h b/lib/ethdev/rte_flow_driver.h
index 46f62c2ec2..34a5a5bcd0 100644
--- a/lib/ethdev/rte_flow_driver.h
+++ b/lib/ethdev/rte_flow_driver.h
@@ -139,6 +139,14 @@ struct rte_flow_ops {
 		 struct rte_flow_item *pmd_items,
 		 uint32_t num_of_items,
 		 struct rte_flow_error *err);
+	struct rte_flow_item_flex_handle *(*flex_item_create)
+		(struct rte_eth_dev *dev,
+		 const struct rte_flow_item_flex_conf *conf,
+		 struct rte_flow_error *error);
+	int (*flex_item_release)
+		(struct rte_eth_dev *dev,
+		 const struct rte_flow_item_flex_handle *handle,
+		 struct rte_flow_error *error);
 };
 
 /**
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index 904bce6ea1..ec3b66d7a1 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -247,6 +247,10 @@ EXPERIMENTAL {
 	rte_mtr_meter_policy_delete;
 	rte_mtr_meter_policy_update;
 	rte_mtr_meter_policy_validate;
+
+	# added in 21.11
+	rte_flow_flex_item_create;
+	rte_flow_flex_item_release;
 };
 
 INTERNAL {
-- 
2.18.1