[PATCH v3 3/7] ethdev: get meter profile/policy objects

[Alexander Kozyrev <akozyrev@nvidia.com>]

Introduce a new Meter API to retrieve a Meter profile and policy
objects using the profile/policy ID previously created with
meter_profile_add() and meter_policy_create() functions.
That allows to save the pointer and avoid any lookups in the
corresponding lists for quick access during a flow rule creation.
Also, it eliminates the need for CIR, CBS and EBS calculations
and conversion to a PMD-specific format when the profile is used.
Pointers are destroyed and cannot be used after thecorresponding
meter_profile_delete() or meter_policy_delete() are called.

Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com>
---
 .../traffic_metering_and_policing.rst         |  7 ++++
 doc/guides/rel_notes/release_22_07.rst        |  1 +
 lib/ethdev/rte_flow.h                         |  7 ++++
 lib/ethdev/rte_mtr.c                          | 41 +++++++++++++++++++
 lib/ethdev/rte_mtr.h                          | 40 ++++++++++++++++++
 lib/ethdev/rte_mtr_driver.h                   | 19 +++++++++
 lib/ethdev/version.map                        |  2 +
 7 files changed, 117 insertions(+)

diff --git a/doc/guides/prog_guide/traffic_metering_and_policing.rst b/doc/guides/prog_guide/traffic_metering_and_policing.rst
index d1958a023d..2ce3236ad8 100644
--- a/doc/guides/prog_guide/traffic_metering_and_policing.rst
+++ b/doc/guides/prog_guide/traffic_metering_and_policing.rst
@@ -107,6 +107,13 @@ traffic meter and policing library.
      to the list of meter actions (``struct rte_mtr_meter_policy_params::actions``)
      specified per color as show in :numref:`figure_rte_mtr_chaining`.
 
+#. The ``rte_mtr_meter_profile_get()`` and ``rte_mtr_meter_policy_get()``
+   API functions are available for getting the object pointers directly.
+   These pointers allow quick access to profile/policy objects and are
+   required by the ``RTE_FLOW_ACTION_TYPE_METER_MARK`` action.
+   This action may omit the policy definition to providei flexibility
+   to match a color later with the ``RTE_FLOW_ITEM_TYPE_METER_COLOR`` item.
+
 Protocol based input color selection
 ------------------------------------
 
diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
index 451ff8d460..6d030bead5 100644
--- a/doc/guides/rel_notes/release_22_07.rst
+++ b/doc/guides/rel_notes/release_22_07.rst
@@ -73,6 +73,7 @@ New Features
 
   * Added METER_COLOR item to match Color Marker set by a Meter.
   * Added ability to set Color Marker via modify_field Flow API.
+  * Added Meter API to get a pointer to profile/policy by their ID.
 
 * **Updated Intel iavf driver.**
 
diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
index 68af109554..9754f6630a 100644
--- a/lib/ethdev/rte_flow.h
+++ b/lib/ethdev/rte_flow.h
@@ -3827,6 +3827,13 @@ struct rte_flow_action {
  */
 struct rte_flow;
 
+/**
+ * Opaque type for Meter profile object returned by MTR API.
+ *
+ * This handle can be used to create Meter actions instead of profile ID.
+ */
+struct rte_flow_meter_profile;
+
 /**
  * @warning
  * @b EXPERIMENTAL: this structure may change without prior notice
diff --git a/lib/ethdev/rte_mtr.c b/lib/ethdev/rte_mtr.c
index 441ea1dca9..90fd277040 100644
--- a/lib/ethdev/rte_mtr.c
+++ b/lib/ethdev/rte_mtr.c
@@ -57,6 +57,25 @@ rte_mtr_ops_get(uint16_t port_id, struct rte_mtr_error *error)
 	ops->func;					\
 })
 
+#define RTE_MTR_HNDL_FUNC(port_id, func)		\
+({							\
+	const struct rte_mtr_ops *ops =			\
+		rte_mtr_ops_get(port_id, error);	\
+	if (ops == NULL)				\
+		return NULL;				\
+							\
+	if (ops->func == NULL) {			\
+		rte_mtr_error_set(error,		\
+			ENOSYS,				\
+			RTE_MTR_ERROR_TYPE_UNSPECIFIED,	\
+			NULL,				\
+			rte_strerror(ENOSYS));		\
+		return NULL;				\
+	}						\
+							\
+	ops->func;					\
+})
+
 /* MTR capabilities get */
 int
 rte_mtr_capabilities_get(uint16_t port_id,
@@ -91,6 +110,17 @@ rte_mtr_meter_profile_delete(uint16_t port_id,
 		meter_profile_id, error);
 }
 
+/** MTR meter profile get */
+struct rte_flow_meter_profile *
+rte_mtr_meter_profile_get(uint16_t port_id,
+	uint32_t meter_profile_id,
+	struct rte_mtr_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	return RTE_MTR_HNDL_FUNC(port_id, meter_profile_get)(dev,
+		meter_profile_id, error);
+}
+
 /* MTR meter policy validate */
 int
 rte_mtr_meter_policy_validate(uint16_t port_id,
@@ -125,6 +155,17 @@ rte_mtr_meter_policy_delete(uint16_t port_id,
 		policy_id, error);
 }
 
+/** MTR meter policy get */
+struct rte_flow_meter_policy *
+rte_mtr_meter_policy_get(uint16_t port_id,
+	uint32_t policy_id,
+	struct rte_mtr_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	return RTE_MTR_HNDL_FUNC(port_id, meter_policy_get)(dev,
+		policy_id, error);
+}
+
 /** MTR object create */
 int
 rte_mtr_create(uint16_t port_id,
diff --git a/lib/ethdev/rte_mtr.h b/lib/ethdev/rte_mtr.h
index 008bc84f0d..58f0d26215 100644
--- a/lib/ethdev/rte_mtr.h
+++ b/lib/ethdev/rte_mtr.h
@@ -623,6 +623,26 @@ rte_mtr_meter_profile_delete(uint16_t port_id,
 	uint32_t meter_profile_id,
 	struct rte_mtr_error *error);
 
+/**
+ * Meter profile object get
+ *
+ * Get meter profile object for a given meter profile ID.
+ *
+ * @param[in] port_id
+ *   The port identifier of the Ethernet device.
+ * @param[in] meter_profile_id
+ *   Meter profile ID. Needs to be the valid.
+ * @param[out] error
+ *   Error details. Filled in only on error, when not NULL.
+ * @return
+ *   A valid handle in case of success, NULL otherwise.
+ */
+__rte_experimental
+struct rte_flow_meter_profile *
+rte_mtr_meter_profile_get(uint16_t port_id,
+	uint32_t meter_profile_id,
+	struct rte_mtr_error *error);
+
 /**
  * Check whether a meter policy can be created on a given port.
  *
@@ -679,6 +699,26 @@ rte_mtr_meter_policy_add(uint16_t port_id,
 	struct rte_mtr_meter_policy_params *policy,
 	struct rte_mtr_error *error);
 
+/**
+ * Meter policy object get
+ *
+ * Get meter policy object for a given meter policy ID.
+ *
+ * @param[in] port_id
+ *   The port identifier of the Ethernet device.
+ * @param[in] policy_id
+ *   Meter policy ID. Needs to be the valid.
+ * @param[out] error
+ *   Error details. Filled in only on error, when not NULL.
+ * @return
+ *   A valid handle in case of success, NULL otherwise.
+ */
+__rte_experimental
+struct rte_flow_meter_policy *
+rte_mtr_meter_policy_get(uint16_t port_id,
+	uint32_t policy_id,
+	struct rte_mtr_error *error);
+
 /**
  * Define meter policy action list:
  * GREEN - GREEN, YELLOW - YELLOW, RED - RED
diff --git a/lib/ethdev/rte_mtr_driver.h b/lib/ethdev/rte_mtr_driver.h
index f7dca9a54c..948a629b93 100644
--- a/lib/ethdev/rte_mtr_driver.h
+++ b/lib/ethdev/rte_mtr_driver.h
@@ -41,6 +41,12 @@ typedef int (*rte_mtr_meter_profile_delete_t)(struct rte_eth_dev *dev,
 	uint32_t meter_profile_id,
 	struct rte_mtr_error *error);
 
+/** @internal MTR meter profile get. */
+typedef struct rte_flow_meter_profile *
+(*rte_mtr_meter_profile_get_t)(struct rte_eth_dev *dev,
+	uint32_t meter_profile_id,
+	struct rte_mtr_error *error);
+
 /** @internal MTR meter policy validate. */
 typedef int (*rte_mtr_meter_policy_validate_t)(struct rte_eth_dev *dev,
 	struct rte_mtr_meter_policy_params *policy,
@@ -57,6 +63,13 @@ typedef int (*rte_mtr_meter_policy_delete_t)(struct rte_eth_dev *dev,
 	uint32_t policy_id,
 	struct rte_mtr_error *error);
 
+/** @internal MTR meter policy get. */
+typedef struct rte_flow_meter_policy *
+(*rte_mtr_meter_policy_get_t)(struct rte_eth_dev *dev,
+	uint32_t policy_id,
+	struct rte_mtr_error *error);
+
+
 /** @internal MTR object create. */
 typedef int (*rte_mtr_create_t)(struct rte_eth_dev *dev,
 	uint32_t mtr_id,
@@ -194,6 +207,12 @@ struct rte_mtr_ops {
 
 	/** MTR object meter policy update */
 	rte_mtr_meter_policy_update_t meter_policy_update;
+
+	/** MTR meter profile get */
+	rte_mtr_meter_profile_get_t meter_profile_get;
+
+	/** MTR meter policy get */
+	rte_mtr_meter_policy_get_t meter_policy_get;
 };
 
 /**
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index daca7851f2..2609f2e709 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -285,6 +285,8 @@ EXPERIMENTAL {
 	rte_mtr_color_in_protocol_priority_get;
 	rte_mtr_color_in_protocol_set;
 	rte_mtr_meter_vlan_table_update;
+	rte_mtr_meter_profile_get;
+	rte_mtr_meter_policy_get;
 };
 
 INTERNAL {
-- 
2.18.2