rte_distributor.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2017 Intel Corporation
 */

#ifndef _RTE_DISTRIBUTOR_H_
#define _RTE_DISTRIBUTOR_H_

#ifdef __cplusplus
extern "C" {
#endif

/* Type of distribution (burst/single) */
enum rte_distributor_alg_type {
    RTE_DIST_ALG_BURST = 0,
    RTE_DIST_ALG_SINGLE,
    RTE_DIST_NUM_ALG_TYPES
};

struct rte_distributor;
struct rte_mbuf;

struct rte_distributor *
rte_distributor_create(const char *name, unsigned int socket_id,
        unsigned int num_workers,
        unsigned int alg_type);

/*  *** APIS to be called on the distributor lcore ***  */
/*
 * The following APIs are the public APIs which are designed for use on a
 * single lcore which acts as the distributor lcore for a given distributor
 * instance. These functions cannot be called on multiple cores simultaneously
 * without using locking to protect access to the internals of the distributor.
 *
 * NOTE: a given lcore cannot act as both a distributor lcore and a worker lcore
 * for the same distributor instance, otherwise deadlock will result.
 */

int
rte_distributor_process(struct rte_distributor *d,
        struct rte_mbuf **mbufs, unsigned int num_mbufs);

int
rte_distributor_returned_pkts(struct rte_distributor *d,
        struct rte_mbuf **mbufs, unsigned int max_mbufs);

int
rte_distributor_flush(struct rte_distributor *d);

void
rte_distributor_clear_returns(struct rte_distributor *d);

/*  *** APIS to be called on the worker lcores ***  */
/*
 * The following APIs are the public APIs which are designed for use on
 * multiple lcores which act as workers for a distributor. Each lcore should use
 * a unique worker id when requesting packets.
 *
 * NOTE: a given lcore cannot act as both a distributor lcore and a worker lcore
 * for the same distributor instance, otherwise deadlock will result.
 */

int
rte_distributor_get_pkt(struct rte_distributor *d,
    unsigned int worker_id, struct rte_mbuf **pkts,
    struct rte_mbuf **oldpkt, unsigned int retcount);

int
rte_distributor_return_pkt(struct rte_distributor *d,
    unsigned int worker_id, struct rte_mbuf **oldpkt, int num);

void
rte_distributor_request_pkt(struct rte_distributor *d,
        unsigned int worker_id, struct rte_mbuf **oldpkt,
        unsigned int count);

int
rte_distributor_poll_pkt(struct rte_distributor *d,
        unsigned int worker_id, struct rte_mbuf **mbufs);

#ifdef __cplusplus
}
#endif

#endif