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/*-
* BSD LICENSE
*
* Copyright 2016 6WIND S.A.
* Copyright 2016 Mellanox.
*
* 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 6WIND S.A. 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 RTE_FLOW_DRIVER_H_
#define RTE_FLOW_DRIVER_H_
/**
* @file
* RTE generic flow 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_flow.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Generic flow operations structure implemented and returned by PMDs.
*
* To implement this API, PMDs must handle the RTE_ETH_FILTER_GENERIC filter
* type in their .filter_ctrl callback function (struct eth_dev_ops) as well
* as the RTE_ETH_FILTER_GET filter operation.
*
* If successful, this operation must result in a pointer to a PMD-specific
* struct rte_flow_ops written to the argument address as described below:
*
* \code
*
* // PMD filter_ctrl callback
*
* static const struct rte_flow_ops pmd_flow_ops = { ... };
*
* switch (filter_type) {
* case RTE_ETH_FILTER_GENERIC:
* if (filter_op != RTE_ETH_FILTER_GET)
* return -EINVAL;
* *(const void **)arg = &pmd_flow_ops;
* return 0;
* }
*
* \endcode
*
* See also rte_flow_ops_get().
*
* These callback functions are not supposed to be used by applications
* directly, which must rely on the API defined in rte_flow.h.
*
* Public-facing wrapper functions perform a few consistency checks so that
* unimplemented (i.e. NULL) callbacks simply return -ENOTSUP. These
* callbacks otherwise only differ by their first argument (with port ID
* already resolved to a pointer to struct rte_eth_dev).
*/
struct rte_flow_ops {
/** See rte_flow_validate(). */
int (*validate)
(struct rte_eth_dev *,
const struct rte_flow_attr *,
const struct rte_flow_item [],
const struct rte_flow_action [],
struct rte_flow_error *);
/** See rte_flow_create(). */
struct rte_flow *(*create)
(struct rte_eth_dev *,
const struct rte_flow_attr *,
const struct rte_flow_item [],
const struct rte_flow_action [],
struct rte_flow_error *);
/** See rte_flow_destroy(). */
int (*destroy)
(struct rte_eth_dev *,
struct rte_flow *,
struct rte_flow_error *);
/** See rte_flow_flush(). */
int (*flush)
(struct rte_eth_dev *,
struct rte_flow_error *);
/** See rte_flow_query(). */
int (*query)
(struct rte_eth_dev *,
struct rte_flow *,
enum rte_flow_action_type,
void *,
struct rte_flow_error *);
};
/**
* Initialize generic flow error structure.
*
* This function also sets rte_errno to a given value.
*
* @param[out] error
* Pointer to flow error structure (may be NULL).
* @param code
* Related error code (rte_errno).
* @param type
* Cause field and error types.
* @param cause
* Object responsible for the error.
* @param message
* Human-readable error message.
*
* @return
* Error code.
*/
static inline int
rte_flow_error_set(struct rte_flow_error *error,
int code,
enum rte_flow_error_type type,
const void *cause,
const char *message)
{
if (error) {
*error = (struct rte_flow_error){
.type = type,
.cause = cause,
.message = message,
};
}
rte_errno = code;
return code;
}
/**
* Get generic flow operations structure from a port.
*
* @param port_id
* Port identifier to query.
* @param[out] error
* Pointer to flow error structure.
*
* @return
* The flow operations structure associated with port_id, NULL in case of
* error, in which case rte_errno is set and the error structure contains
* additional details.
*/
const struct rte_flow_ops *
rte_flow_ops_get(uint8_t port_id, struct rte_flow_error *error);
#ifdef __cplusplus
}
#endif
#endif /* RTE_FLOW_DRIVER_H_ */
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