[dpdk-dev] [PATCH V4 3/5] ethdev: add new api for traffic metering and policing
Cristian Dumitrescu
cristian.dumitrescu at intel.com
Fri Oct 13 14:22:16 CEST 2017
This patch introduces new ethdev generic API for Traffic Metering and
Policing (MTR), which is yet another standard RX offload for Ethernet
devices.
Similar to rte_flow and rte_tm APIs, the configuration of MTR objects is
done in their own namespace (rte_mtr) within the librte_ether library.
Main features:
1. Traffic metering: determine the color for the current packet (green,
yellow, red) based on history maintained by the MTR object. Supported
algorithms: srTCM (RFC 2697), trTCM (RFC 2698 and RFC 4115).
2. Policing (per meter output color actions): re-color the packet (keep
or change the meter output color) or drop the packet.
3. Statistics
4. Capability API
Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu at intel.com>
---
Changes in v4:
- Input from Hemant:
- Added the NONE metering algorithm for meter pass-through mode
- Reordered stats counter types per pkt and per byte
- Copyright cosmetics
- Updated ethdev port_id from uint8_t to uint16_t
Changes in v3:
- None
Changes in v2:
- Implemented input from Hemant:
- Added support for RFC 4115 trTCM algorithm
- Added support for meter pass-through mode: see API functions
rte_mtr_meter_enable() and rte_mtr_meter_disable()
- Implemented input from Jerin:
- Added capability API
- Implemented input from Thomas:
- Added new API functions under the EXPERIMENTAL section in map file
- Improved the mechanism for MTR object chaining: each MTR object can be
configured whther to read input color from a previous MTR object in the
same flow (if any) of from DSCP traslation table
- Improved run-time update functions
- Doxygen: added more descriptions, small fixes
Changes in v1 (from RFC [1]):
- Implemented input from Thomas:
- Added EXPERIMENTAL tag in rte_mtr.h and MANTAINERS for this new API
- Implemented input from Adrien:
- Added more Doxygen comments to re-inforce relationship between MTR and
flow
- Doxygen: added hook in doxy-api-index.md
[1] RFC: http://www.dpdk.org/ml/archives/dev/2017-May/066888.html
MAINTAINERS | 4 +
doc/api/doxy-api-index.md | 1 +
lib/librte_ether/Makefile | 3 +
lib/librte_ether/rte_ethdev_version.map | 18 +
lib/librte_ether/rte_mtr.c | 229 ++++++++++
lib/librte_ether/rte_mtr.h | 730 ++++++++++++++++++++++++++++++++
lib/librte_ether/rte_mtr_driver.h | 221 ++++++++++
7 files changed, 1206 insertions(+)
create mode 100644 lib/librte_ether/rte_mtr.c
create mode 100644 lib/librte_ether/rte_mtr.h
create mode 100644 lib/librte_ether/rte_mtr_driver.h
diff --git a/MAINTAINERS b/MAINTAINERS
index c00d6d8..464ebac 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -255,6 +255,10 @@ M: Cristian Dumitrescu <cristian.dumitrescu at intel.com>
T: git://dpdk.org/next/dpdk-next-tm
F: lib/librte_ether/rte_tm*
+Traffic Metering and Policing API - EXPERIMENTAL
+M: Cristian Dumitrescu <cristian.dumitrescu at intel.com>
+F: lib/librte_ether/rte_mtr*
+
Crypto API
M: Declan Doherty <declan.doherty at intel.com>
F: lib/librte_cryptodev/
diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md
index 990815f..07d6f4a 100644
--- a/doc/api/doxy-api-index.md
+++ b/doc/api/doxy-api-index.md
@@ -41,6 +41,7 @@ The public API headers are grouped by topics:
[ethctrl] (@ref rte_eth_ctrl.h),
[rte_flow] (@ref rte_flow.h),
[rte_tm] (@ref rte_tm.h),
+ [rte_mtr] (@ref rte_mtr.h),
[cryptodev] (@ref rte_cryptodev.h),
[eventdev] (@ref rte_eventdev.h),
[event_eth_rx_adapter] (@ref rte_event_eth_rx_adapter.h),
diff --git a/lib/librte_ether/Makefile b/lib/librte_ether/Makefile
index edcddf7..b2a93bf 100644
--- a/lib/librte_ether/Makefile
+++ b/lib/librte_ether/Makefile
@@ -46,6 +46,7 @@ LIBABIVER := 8
SRCS-y += rte_ethdev.c
SRCS-y += rte_flow.c
SRCS-y += rte_tm.c
+SRCS-y += rte_mtr.c
SRCS-y += ethdev_profile.c
#
@@ -60,5 +61,7 @@ SYMLINK-y-include += rte_flow.h
SYMLINK-y-include += rte_flow_driver.h
SYMLINK-y-include += rte_tm.h
SYMLINK-y-include += rte_tm_driver.h
+SYMLINK-y-include += rte_mtr.h
+SYMLINK-y-include += rte_mtr_driver.h
include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_ether/rte_ethdev_version.map b/lib/librte_ether/rte_ethdev_version.map
index e27f596..bc0bbc5 100644
--- a/lib/librte_ether/rte_ethdev_version.map
+++ b/lib/librte_ether/rte_ethdev_version.map
@@ -196,3 +196,21 @@ DPDK_17.11 {
rte_flow_error_set;
} DPDK_17.08;
+
+EXPERIMENTAL {
+ global:
+
+ rte_mtr_capabilities_get;
+ rte_mtr_meter_profile_add;
+ rte_mtr_meter_profile_delete;
+ rte_mtr_create;
+ rte_mtr_destroy;
+ rte_mtr_meter_enable;
+ rte_mtr_meter_disable;
+ rte_mtr_meter_profile_update;
+ rte_mtr_meter_dscp_table_update;
+ rte_mtr_policer_actions_update;
+ rte_mtr_stats_update;
+ rte_mtr_stats_read;
+
+} DPDK_17.11;
diff --git a/lib/librte_ether/rte_mtr.c b/lib/librte_ether/rte_mtr.c
new file mode 100644
index 0000000..4f56f87
--- /dev/null
+++ b/lib/librte_ether/rte_mtr.c
@@ -0,0 +1,229 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2017 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+
+#include <rte_errno.h>
+#include "rte_ethdev.h"
+#include "rte_mtr_driver.h"
+#include "rte_mtr.h"
+
+/* Get generic traffic metering & policing operations structure from a port. */
+const struct rte_mtr_ops *
+rte_mtr_ops_get(uint16_t port_id, struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ const struct rte_mtr_ops *ops;
+
+ if (!rte_eth_dev_is_valid_port(port_id)) {
+ rte_mtr_error_set(error,
+ ENODEV,
+ RTE_MTR_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ rte_strerror(ENODEV));
+ return NULL;
+ }
+
+ if ((dev->dev_ops->mtr_ops_get == NULL) ||
+ (dev->dev_ops->mtr_ops_get(dev, &ops) != 0) ||
+ (ops == NULL)) {
+ rte_mtr_error_set(error,
+ ENOSYS,
+ RTE_MTR_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ rte_strerror(ENOSYS));
+ return NULL;
+ }
+
+ return ops;
+}
+
+#define RTE_MTR_FUNC(port_id, func) \
+({ \
+ const struct rte_mtr_ops *ops = \
+ rte_mtr_ops_get(port_id, error); \
+ if (ops == NULL) \
+ return -rte_errno; \
+ \
+ if (ops->func == NULL) \
+ return -rte_mtr_error_set(error, \
+ ENOSYS, \
+ RTE_MTR_ERROR_TYPE_UNSPECIFIED, \
+ NULL, \
+ rte_strerror(ENOSYS)); \
+ \
+ ops->func; \
+})
+
+/* MTR capabilities get */
+int
+rte_mtr_capabilities_get(uint16_t port_id,
+ struct rte_mtr_capabilities *cap,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, capabilities_get)(dev,
+ cap, error);
+}
+
+/* MTR meter profile add */
+int
+rte_mtr_meter_profile_add(uint16_t port_id,
+ uint32_t meter_profile_id,
+ struct rte_mtr_meter_profile *profile,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, meter_profile_add)(dev,
+ meter_profile_id, profile, error);
+}
+
+/** MTR meter profile delete */
+int
+rte_mtr_meter_profile_delete(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_FUNC(port_id, meter_profile_delete)(dev,
+ meter_profile_id, error);
+}
+
+/** MTR object create */
+int
+rte_mtr_create(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_params *params,
+ int shared,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, create)(dev,
+ mtr_id, params, shared, error);
+}
+
+/** MTR object destroy */
+int
+rte_mtr_destroy(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, destroy)(dev,
+ mtr_id, error);
+}
+
+/** MTR object meter enable */
+int
+rte_mtr_meter_enable(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, meter_enable)(dev,
+ mtr_id, error);
+}
+
+/** MTR object meter disable */
+int
+rte_mtr_meter_disable(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, meter_disable)(dev,
+ mtr_id, error);
+}
+
+/** MTR object meter profile update */
+int
+rte_mtr_meter_profile_update(uint16_t port_id,
+ uint32_t mtr_id,
+ uint32_t meter_profile_id,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, meter_profile_update)(dev,
+ mtr_id, meter_profile_id, error);
+}
+
+/** MTR object meter DSCP table update */
+int
+rte_mtr_meter_dscp_table_update(uint16_t port_id,
+ uint32_t mtr_id,
+ enum rte_mtr_color *dscp_table,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, meter_dscp_table_update)(dev,
+ mtr_id, dscp_table, error);
+}
+
+/** MTR object policer action update */
+int
+rte_mtr_policer_actions_update(uint16_t port_id,
+ uint32_t mtr_id,
+ uint32_t action_mask,
+ enum rte_mtr_policer_action *actions,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, policer_actions_update)(dev,
+ mtr_id, action_mask, actions, error);
+}
+
+/** MTR object enabled stats update */
+int
+rte_mtr_stats_update(uint16_t port_id,
+ uint32_t mtr_id,
+ uint64_t stats_mask,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, stats_update)(dev,
+ mtr_id, stats_mask, error);
+}
+
+/** MTR object stats read */
+int
+rte_mtr_stats_read(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_stats *stats,
+ uint64_t *stats_mask,
+ int clear,
+ struct rte_mtr_error *error)
+{
+ struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+ return RTE_MTR_FUNC(port_id, stats_read)(dev,
+ mtr_id, stats, stats_mask, clear, error);
+}
diff --git a/lib/librte_ether/rte_mtr.h b/lib/librte_ether/rte_mtr.h
new file mode 100644
index 0000000..f6b6ef3
--- /dev/null
+++ b/lib/librte_ether/rte_mtr.h
@@ -0,0 +1,730 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright 2017 Intel Corporation
+ * Copyright 2017 NXP
+ * Copyright 2017 Cavium
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __INCLUDE_RTE_MTR_H__
+#define __INCLUDE_RTE_MTR_H__
+
+/**
+ * @file
+ * RTE Generic Traffic Metering and Policing API
+ *
+ * This interface provides the ability to configure the traffic metering and
+ * policing (MTR) in a generic way.
+ *
+ * The processing done for each input packet hitting a MTR object is:
+ * A) Traffic metering: The packet is assigned a color (the meter output
+ * color), based on the previous history of the flow reflected in the
+ * current state of the MTR object, according to the specific traffic
+ * metering algorithm. The traffic metering algorithm can typically work
+ * in color aware mode, in which case the input packet already has an
+ * initial color (the input color), or in color blind mode, which is
+ * equivalent to considering all input packets initially colored as green.
+ * B) Policing: There is a separate policer action configured for each meter
+ * output color, which can:
+ * a) Drop the packet.
+ * b) Keep the same packet color: the policer output color matches the
+ * meter output color (essentially a no-op action).
+ * c) Recolor the packet: the policer output color is different than
+ * the meter output color.
+ * The policer output color is the output color of the packet, which is
+ * set in the packet meta-data (i.e. struct rte_mbuf::sched::color).
+ * C) Statistics: The set of counters maintained for each MTR object is
+ * configurable and subject to the implementation support. This set
+ * includes the number of packets and bytes dropped or passed for each
+ * output color.
+ *
+ * Once successfully created, an MTR object is linked to one or several flows
+ * through the meter action of the flow API.
+ * A) Whether an MTR object is private to a flow or potentially shared by
+ * several flows has to be specified at creation time.
+ * B) Several meter actions can be potentially registered for the same flow.
+ *
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ */
+#include <stdint.h>
+
+#include <rte_common.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Color
+ */
+enum rte_mtr_color {
+ RTE_MTR_GREEN = 0, /**< Green */
+ RTE_MTR_YELLOW, /**< Yellow */
+ RTE_MTR_RED, /**< Red */
+ RTE_MTR_COLORS /**< Number of colors. */
+};
+
+/**
+ * Statistics counter type
+ */
+enum rte_mtr_stats_type {
+ /** Number of packets passed as green by the policer. */
+ RTE_MTR_STATS_N_PKTS_GREEN = 1 << 0,
+
+ /** Number of packets passed as yellow by the policer. */
+ RTE_MTR_STATS_N_PKTS_YELLOW = 1 << 1,
+
+ /** Number of packets passed as red by the policer. */
+ RTE_MTR_STATS_N_PKTS_RED = 1 << 2,
+
+ /** Number of packets dropped by the policer. */
+ RTE_MTR_STATS_N_PKTS_DROPPED = 1 << 3,
+
+ /** Number of bytes passed as green by the policer. */
+ RTE_MTR_STATS_N_BYTES_GREEN = 1 << 4,
+
+ /** Number of bytes passed as yellow by the policer. */
+ RTE_MTR_STATS_N_BYTES_YELLOW = 1 << 5,
+
+ /** Number of bytes passed as red by the policer. */
+ RTE_MTR_STATS_N_BYTES_RED = 1 << 6,
+
+ /** Number of bytes dropped by the policer. */
+ RTE_MTR_STATS_N_BYTES_DROPPED = 1 << 7,
+};
+
+/**
+ * Statistics counters
+ */
+struct rte_mtr_stats {
+ /** Number of packets passed by the policer (per color). */
+ uint64_t n_pkts[RTE_MTR_COLORS];
+
+ /** Number of bytes passed by the policer (per color). */
+ uint64_t n_bytes[RTE_MTR_COLORS];
+
+ /** Number of packets dropped by the policer. */
+ uint64_t n_pkts_dropped;
+
+ /** Number of bytes passed by the policer. */
+ uint64_t n_bytes_dropped;
+};
+
+/**
+ * Traffic metering algorithms
+ */
+enum rte_mtr_algorithm {
+ /** No traffic metering performed, the output color is the same as the
+ * input color for every input packet. The meter of the MTR object is
+ * working in pass-through mode, having same effect as meter disable.
+ * @see rte_mtr_meter_disable()
+ */
+ RTE_MTR_NONE = 0,
+
+ /** Single Rate Three Color Marker (srTCM) - IETF RFC 2697. */
+ RTE_MTR_SRTCM_RFC2697,
+
+ /** Two Rate Three Color Marker (trTCM) - IETF RFC 2698. */
+ RTE_MTR_TRTCM_RFC2698,
+
+ /** Two Rate Three Color Marker (trTCM) - IETF RFC 4115. */
+ RTE_MTR_TRTCM_RFC4115,
+};
+
+/**
+ * Meter profile
+ */
+struct rte_mtr_meter_profile {
+ /** Traffic metering algorithm. */
+ enum rte_mtr_algorithm alg;
+
+ RTE_STD_C11
+ union {
+ /** Items only valid when *alg* is set to srTCM - RFC 2697. */
+ struct {
+ /** Committed Information Rate (CIR) (bytes/second). */
+ uint64_t cir;
+
+ /** Committed Burst Size (CBS) (bytes). */
+ uint64_t cbs;
+
+ /** Excess Burst Size (EBS) (bytes). */
+ uint64_t ebs;
+ } srtcm_rfc2697;
+
+ /** Items only valid when *alg* is set to trTCM - RFC 2698. */
+ struct {
+ /** Committed Information Rate (CIR) (bytes/second). */
+ uint64_t cir;
+
+ /** Peak Information Rate (PIR) (bytes/second). */
+ uint64_t pir;
+
+ /** Committed Burst Size (CBS) (byes). */
+ uint64_t cbs;
+
+ /** Peak Burst Size (PBS) (bytes). */
+ uint64_t pbs;
+ } trtcm_rfc2698;
+
+ /** Items only valid when *alg* is set to trTCM - RFC 4115. */
+ struct {
+ /** Committed Information Rate (CIR) (bytes/second). */
+ uint64_t cir;
+
+ /** Excess Information Rate (EIR) (bytes/second). */
+ uint64_t eir;
+
+ /** Committed Burst Size (CBS) (byes). */
+ uint64_t cbs;
+
+ /** Excess Burst Size (EBS) (bytes). */
+ uint64_t ebs;
+ } trtcm_rfc4115;
+ };
+};
+
+/**
+ * Policer actions
+ */
+enum rte_mtr_policer_action {
+ /** Recolor the packet as green. */
+ MTR_POLICER_ACTION_COLOR_GREEN = 0,
+
+ /** Recolor the packet as yellow. */
+ MTR_POLICER_ACTION_COLOR_YELLOW,
+
+ /** Recolor the packet as red. */
+ MTR_POLICER_ACTION_COLOR_RED,
+
+ /** Drop the packet. */
+ MTR_POLICER_ACTION_DROP,
+};
+
+/**
+ * Parameters for each traffic metering & policing object
+ *
+ * @see enum rte_mtr_stats_type
+ */
+struct rte_mtr_params {
+ /** Meter profile ID. */
+ uint32_t meter_profile_id;
+
+ /** Meter input color in case of MTR object chaining. When non-zero: if
+ * a previous MTR object is enabled in the same flow, then the color
+ * determined by the latest MTR object in the same flow is used as the
+ * input color by the current MTR object, otherwise the current MTR
+ * object uses the *dscp_table* to determine the input color. When zero:
+ * the color determined by any previous MTR object in same flow is
+ * ignored by the current MTR object, which uses the *dscp_table* to
+ * determine the input color.
+ */
+ int use_prev_mtr_color;
+
+ /** Meter input color. When non-NULL: it points to a pre-allocated and
+ * pre-populated table with exactly 64 elements providing the input
+ * color for each value of the IPv4/IPv6 Differentiated Services Code
+ * Point (DSCP) input packet field. When NULL: it is equivalent to
+ * setting this parameter to an all-green populated table (i.e. table
+ * with all the 64 elements set to green color). The color blind mode
+ * is configured by setting *use_prev_mtr_color* to 0 and *dscp_table*
+ * to either NULL or to an all-green populated table. When
+ * *use_prev_mtr_color* is non-zero value or when *dscp_table* contains
+ * at least one yellow or red color element, then the color aware mode
+ * is configured.
+ */
+ enum rte_mtr_color *dscp_table;
+
+ /** Non-zero to enable the meter, zero to disable the meter at the time
+ * of MTR object creation. Ignored when the meter profile indicated by
+ * *meter_profile_id* is set to NONE.
+ * @see rte_mtr_meter_disable()
+ */
+ int meter_enable;
+
+ /** Policer actions (per meter output color). */
+ enum rte_mtr_policer_action action[RTE_MTR_COLORS];
+
+ /** Set of stats counters to be enabled.
+ * @see enum rte_mtr_stats_type
+ */
+ uint64_t stats_mask;
+};
+
+/**
+ * MTR capabilities
+ */
+struct rte_mtr_capabilities {
+ /** Maximum number of MTR objects. */
+ uint32_t n_max;
+
+ /** Maximum number of MTR objects that can be shared by multiple flows.
+ * The value of zero indicates that shared MTR objects are not
+ * supported. The maximum value is *n_max*.
+ */
+ uint32_t n_shared_max;
+
+ /** When non-zero, this flag indicates that all the MTR objects that
+ * cannot be shared by multiple flows have identical capability set.
+ */
+ int identical;
+
+ /** When non-zero, this flag indicates that all the MTR objects that
+ * can be shared by multiple flows have identical capability set.
+ */
+ int shared_identical;
+
+ /** Maximum number of flows that can share the same MTR object. The
+ * value of zero is invalid. The value of 1 means that shared MTR
+ * objects not supported.
+ */
+ uint32_t shared_n_flows_per_mtr_max;
+
+ /** Maximum number of MTR objects that can be part of the same flow. The
+ * value of zero is invalid. The value of 1 indicates that MTR object
+ * chaining is not supported. The maximum value is *n_max*.
+ */
+ uint32_t chaining_n_mtrs_per_flow_max;
+
+ /**
+ * When non-zero, it indicates that the packet color identified by one
+ * MTR object can be used as the packet input color by any subsequent
+ * MTR object from the same flow. When zero, it indicates that the color
+ * determined by one MTR object is always ignored by any subsequent MTR
+ * object from the same flow. Only valid when MTR chaining is supported,
+ * i.e. *chaining_n_mtrs_per_flow_max* is greater than 1. When non-zero,
+ * it also means that the color aware mode is supported by at least one
+ * metering algorithm.
+ */
+ int chaining_use_prev_mtr_color_supported;
+
+ /**
+ * When non-zero, it indicates that the packet color identified by one
+ * MTR object is always used as the packet input color by any subsequent
+ * MTR object that is part of the same flow. When zero, it indicates
+ * that whether the color determined by one MTR object is either ignored
+ * or used as the packet input color by any subsequent MTR object from
+ * the same flow is individually configurable for each MTR object. Only
+ * valid when *chaining_use_prev_mtr_color_supported* is non-zero.
+ */
+ int chaining_use_prev_mtr_color_enforced;
+
+ /** Maximum number of MTR objects that can have their meter configured
+ * to run the srTCM RFC 2697 algorithm. The value of 0 indicates this
+ * metering algorithm is not supported. The maximum value is *n_max*.
+ */
+ uint32_t meter_srtcm_rfc2697_n_max;
+
+ /** Maximum number of MTR objects that can have their meter configured
+ * to run the trTCM RFC 2698 algorithm. The value of 0 indicates this
+ * metering algorithm is not supported. The maximum value is *n_max*.
+ */
+ uint32_t meter_trtcm_rfc2698_n_max;
+
+ /** Maximum number of MTR objects that can have their meter configured
+ * to run the trTCM RFC 4115 algorithm. The value of 0 indicates this
+ * metering algorithm is not supported. The maximum value is *n_max*.
+ */
+ uint32_t meter_trtcm_rfc4115_n_max;
+
+ /** Maximum traffic rate that can be metered by a single MTR object. For
+ * srTCM RFC 2697, this is the maximum CIR rate. For trTCM RFC 2698,
+ * this is the maximum PIR rate. For trTCM RFC 4115, this is the maximum
+ * value for the sum of PIR and EIR rates.
+ */
+ uint64_t meter_rate_max;
+
+ /**
+ * When non-zero, it indicates that color aware mode is supported for
+ * the srTCM RFC 2697 metering algorithm.
+ */
+ int color_aware_srtcm_rfc2697_supported;
+
+ /**
+ * When non-zero, it indicates that color aware mode is supported for
+ * the trTCM RFC 2698 metering algorithm.
+ */
+ int color_aware_trtcm_rfc2698_supported;
+
+ /**
+ * When non-zero, it indicates that color aware mode is supported for
+ * the trTCM RFC 4115 metering algorithm.
+ */
+ int color_aware_trtcm_rfc4115_supported;
+
+ /** When non-zero, it indicates that the policer packet recolor actions
+ * are supported.
+ * @see enum rte_mtr_policer_action
+ */
+ int policer_action_recolor_supported;
+
+ /** When non-zero, it indicates that the policer packet drop action is
+ * supported.
+ * @see enum rte_mtr_policer_action
+ */
+ int policer_action_drop_supported;
+
+ /** Set of supported statistics counter types.
+ * @see enum rte_mtr_stats_type
+ */
+ uint64_t stats_mask;
+};
+
+/**
+ * Verbose error types.
+ *
+ * Most of them provide the type of the object referenced by struct
+ * rte_mtr_error::cause.
+ */
+enum rte_mtr_error_type {
+ RTE_MTR_ERROR_TYPE_NONE, /**< No error. */
+ RTE_MTR_ERROR_TYPE_UNSPECIFIED, /**< Cause unspecified. */
+ RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
+ RTE_MTR_ERROR_TYPE_METER_PROFILE,
+ RTE_MTR_ERROR_TYPE_MTR_ID,
+ RTE_MTR_ERROR_TYPE_MTR_PARAMS,
+ RTE_MTR_ERROR_TYPE_POLICER_ACTION_GREEN,
+ RTE_MTR_ERROR_TYPE_POLICER_ACTION_YELLOW,
+ RTE_MTR_ERROR_TYPE_POLICER_ACTION_RED,
+ RTE_MTR_ERROR_TYPE_STATS_MASK,
+ RTE_MTR_ERROR_TYPE_STATS,
+ RTE_MTR_ERROR_TYPE_SHARED,
+};
+
+/**
+ * Verbose error structure definition.
+ *
+ * This object is normally allocated by applications and set by PMDs, the
+ * message points to a constant string which does not need to be freed by
+ * the application, however its pointer can be considered valid only as long
+ * as its associated DPDK port remains configured. Closing the underlying
+ * device or unloading the PMD invalidates it.
+ *
+ * Both cause and message may be NULL regardless of the error type.
+ */
+struct rte_mtr_error {
+ enum rte_mtr_error_type type; /**< Cause field and error type. */
+ const void *cause; /**< Object responsible for the error. */
+ const char *message; /**< Human-readable error message. */
+};
+
+/**
+ * MTR capabilities get
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[out] cap
+ * MTR capabilities. Needs to be pre-allocated and valid.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_capabilities_get(uint16_t port_id,
+ struct rte_mtr_capabilities *cap,
+ struct rte_mtr_error *error);
+
+/**
+ * Meter profile add
+ *
+ * Create a new meter profile with ID set to *meter_profile_id*. The new profile
+ * is used to create one or several MTR objects.
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] meter_profile_id
+ * ID for the new meter profile. Needs to be unused by any of the existing
+ * meter profiles added for the current port.
+ * @param[in] profile
+ * Meter profile parameters. Needs to be pre-allocated and valid.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_meter_profile_add(uint16_t port_id,
+ uint32_t meter_profile_id,
+ struct rte_mtr_meter_profile *profile,
+ struct rte_mtr_error *error);
+
+/**
+ * Meter profile delete
+ *
+ * Delete an existing meter profile. This operation fails when there is
+ * currently at least one user (i.e. MTR object) of this profile.
+ *
+ * @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
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_meter_profile_delete(uint16_t port_id,
+ uint32_t meter_profile_id,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object create
+ *
+ * Create a new MTR object for the current port. This object is run as part of
+ * associated flow action for traffic metering and policing.
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID. Needs to be unused by any of the existing MTR objects.
+ * created for the current port.
+ * @param[in] params
+ * MTR object params. Needs to be pre-allocated and valid.
+ * @param[in] shared
+ * Non-zero when this MTR object can be shared by multiple flows, zero when
+ * this MTR object can be used by a single flow.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ *
+ * @see enum rte_flow_action_type::RTE_FLOW_ACTION_TYPE_METER
+ */
+int
+rte_mtr_create(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_params *params,
+ int shared,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object destroy
+ *
+ * Delete an existing MTR object. This operation fails when there is currently
+ * at least one user (i.e. flow) of this MTR object.
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID. Needs to be valid.
+ * created for the current port.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_destroy(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object meter disable
+ *
+ * Disable the meter of an existing MTR object. In disabled state, the meter of
+ * the current MTR object works in pass-through mode, meaning that for each
+ * input packet the meter output color is always the same as the input color. In
+ * particular, when the meter of the current MTR object is configured in color
+ * blind mode, the input color is always green, so the meter output color is
+ * also always green. Note that the policer and the statistics of the current
+ * MTR object are working as usual while the meter is disabled. No action is
+ * taken and this function returns successfully when the meter of the current
+ * MTR object is already disabled.
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_meter_disable(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object meter enable
+ *
+ * Enable the meter of an existing MTR object. If the MTR object has its meter
+ * already enabled, then no action is taken and this function returns
+ * successfully.
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_meter_enable(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object meter profile update
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID. Needs to be valid.
+ * @param[in] meter_profile_id
+ * Meter profile ID for the current MTR object. Needs to be valid.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_meter_profile_update(uint16_t port_id,
+ uint32_t mtr_id,
+ uint32_t meter_profile_id,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object DSCP table update
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID. Needs to be valid.
+ * @param[in] dscp_table
+ * When non-NULL: it points to a pre-allocated and pre-populated table with
+ * exactly 64 elements providing the input color for each value of the
+ * IPv4/IPv6 Differentiated Services Code Point (DSCP) input packet field.
+ * When NULL: it is equivalent to setting this parameter to an “all-green”
+ * populated table (i.e. table with all the 64 elements set to green color).
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_meter_dscp_table_update(uint16_t port_id,
+ uint32_t mtr_id,
+ enum rte_mtr_color *dscp_table,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object policer actions update
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID. Needs to be valid.
+ * @param[in] action_mask
+ * Bit mask indicating which policer actions need to be updated. One or more
+ * policer actions can be updated in a single function invocation. To update
+ * the policer action associated with color C, bit (1 << C) needs to be set in
+ * *action_mask* and element at position C in the *actions* array needs to be
+ * valid.
+ * @param[in] actions
+ * Pre-allocated and pre-populated array of policer actions.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ */
+int
+rte_mtr_policer_actions_update(uint16_t port_id,
+ uint32_t mtr_id,
+ uint32_t action_mask,
+ enum rte_mtr_policer_action *actions,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object enabled statistics counters update
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID. Needs to be valid.
+ * @param[in] stats_mask
+ * Mask of statistics counter types to be enabled for the current MTR object.
+ * Any statistics counter type not included in this set is to be disabled for
+ * the current MTR object.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ *
+ * @see enum rte_mtr_stats_type
+ */
+int
+rte_mtr_stats_update(uint16_t port_id,
+ uint32_t mtr_id,
+ uint64_t stats_mask,
+ struct rte_mtr_error *error);
+
+/**
+ * MTR object statistics counters read
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[in] mtr_id
+ * MTR object ID. Needs to be valid.
+ * @param[out] stats
+ * When non-NULL, it contains the current value for the statistics counters
+ * enabled for the current MTR object.
+ * @param[out] stats_mask
+ * When non-NULL, it contains the mask of statistics counter types that are
+ * currently enabled for this MTR object, indicating which of the counters
+ * retrieved with the *stats* structure are valid.
+ * @param[in] clear
+ * When this parameter has a non-zero value, the statistics counters are
+ * cleared (i.e. set to zero) immediately after they have been read,
+ * otherwise the statistics counters are left untouched.
+ * @param[out] error
+ * Error details. Filled in only on error, when not NULL.
+ * @return
+ * 0 on success, non-zero error code otherwise.
+ *
+ * @see enum rte_mtr_stats_type
+ */
+int
+rte_mtr_stats_read(uint16_t port_id,
+ uint32_t mtr_id,
+ struct rte_mtr_stats *stats,
+ uint64_t *stats_mask,
+ int clear,
+ struct rte_mtr_error *error);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCLUDE_RTE_MTR_H__ */
diff --git a/lib/librte_ether/rte_mtr_driver.h b/lib/librte_ether/rte_mtr_driver.h
new file mode 100644
index 0000000..6a289ef
--- /dev/null
+++ b/lib/librte_ether/rte_mtr_driver.h
@@ -0,0 +1,221 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2017 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __INCLUDE_RTE_MTR_DRIVER_H__
+#define __INCLUDE_RTE_MTR_DRIVER_H__
+
+/**
+ * @file
+ * RTE Generic Traffic Metering and Policing API (Driver Side)
+ *
+ * This file provides implementation helpers for internal use by PMDs, they
+ * are not intended to be exposed to applications and are not subject to ABI
+ * versioning.
+ */
+
+#include <stdint.h>
+
+#include <rte_errno.h>
+#include "rte_ethdev.h"
+#include "rte_mtr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int (*rte_mtr_capabilities_get_t)(struct rte_eth_dev *dev,
+ struct rte_mtr_capabilities *cap,
+ struct rte_mtr_error *error);
+/**< @internal MTR capabilities get */
+
+typedef int (*rte_mtr_meter_profile_add_t)(struct rte_eth_dev *dev,
+ uint32_t meter_profile_id,
+ struct rte_mtr_meter_profile *profile,
+ struct rte_mtr_error *error);
+/**< @internal MTR meter profile add */
+
+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 delete */
+
+typedef int (*rte_mtr_create_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ struct rte_mtr_params *params,
+ int shared,
+ struct rte_mtr_error *error);
+/**< @internal MTR object create */
+
+typedef int (*rte_mtr_destroy_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error);
+/**< @internal MTR object destroy */
+
+typedef int (*rte_mtr_meter_enable_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error);
+/**< @internal MTR object meter enable */
+
+typedef int (*rte_mtr_meter_disable_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ struct rte_mtr_error *error);
+/**< @internal MTR object meter disable */
+
+typedef int (*rte_mtr_meter_profile_update_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ uint32_t meter_profile_id,
+ struct rte_mtr_error *error);
+/**< @internal MTR object meter profile update */
+
+typedef int (*rte_mtr_meter_dscp_table_update_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ enum rte_mtr_color *dscp_table,
+ struct rte_mtr_error *error);
+/**< @internal MTR object meter DSCP table update */
+
+typedef int (*rte_mtr_policer_actions_update_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ uint32_t action_mask,
+ enum rte_mtr_policer_action *actions,
+ struct rte_mtr_error *error);
+/**< @internal MTR object policer action update*/
+
+typedef int (*rte_mtr_stats_update_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ uint64_t stats_mask,
+ struct rte_mtr_error *error);
+/**< @internal MTR object enabled stats update */
+
+typedef int (*rte_mtr_stats_read_t)(struct rte_eth_dev *dev,
+ uint32_t mtr_id,
+ struct rte_mtr_stats *stats,
+ uint64_t *stats_mask,
+ int clear,
+ struct rte_mtr_error *error);
+/**< @internal MTR object stats read */
+
+struct rte_mtr_ops {
+ /** MTR capabilities get */
+ rte_mtr_capabilities_get_t capabilities_get;
+
+ /** MTR meter profile add */
+ rte_mtr_meter_profile_add_t meter_profile_add;
+
+ /** MTR meter profile delete */
+ rte_mtr_meter_profile_delete_t meter_profile_delete;
+
+ /** MTR object create */
+ rte_mtr_create_t create;
+
+ /** MTR object destroy */
+ rte_mtr_destroy_t destroy;
+
+ /** MTR object meter enable */
+ rte_mtr_meter_enable_t meter_enable;
+
+ /** MTR object meter disable */
+ rte_mtr_meter_disable_t meter_disable;
+
+ /** MTR object meter profile update */
+ rte_mtr_meter_profile_update_t meter_profile_update;
+
+ /** MTR object meter DSCP table update */
+ rte_mtr_meter_dscp_table_update_t meter_dscp_table_update;
+
+ /** MTR object policer action update */
+ rte_mtr_policer_actions_update_t policer_actions_update;
+
+ /** MTR object enabled stats update */
+ rte_mtr_stats_update_t stats_update;
+
+ /** MTR object stats read */
+ rte_mtr_stats_read_t stats_read;
+};
+
+/**
+ * Initialize generic error structure.
+ *
+ * This function also sets rte_errno to a given value.
+ *
+ * @param[out] error
+ * Pointer to error structure (may be NULL).
+ * @param[in] code
+ * Related error code (rte_errno).
+ * @param[in] type
+ * Cause field and error type.
+ * @param[in] cause
+ * Object responsible for the error.
+ * @param[in] message
+ * Human-readable error message.
+ *
+ * @return
+ * Error code.
+ */
+static inline int
+rte_mtr_error_set(struct rte_mtr_error *error,
+ int code,
+ enum rte_mtr_error_type type,
+ const void *cause,
+ const char *message)
+{
+ if (error) {
+ *error = (struct rte_mtr_error){
+ .type = type,
+ .cause = cause,
+ .message = message,
+ };
+ }
+ rte_errno = code;
+ return code;
+}
+
+/**
+ * Get generic traffic metering and policing operations structure from a port
+ *
+ * @param[in] port_id
+ * The port identifier of the Ethernet device.
+ * @param[out] error
+ * Error details
+ *
+ * @return
+ * The traffic metering and policing operations structure associated with
+ * port_id on success, NULL otherwise.
+ */
+const struct rte_mtr_ops *
+rte_mtr_ops_get(uint16_t port_id, struct rte_mtr_error *error);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCLUDE_RTE_MTR_DRIVER_H__ */
--
2.7.4
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