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* 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__ */
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