qat_fork.c

/* ====================================================================
 *
 *
 *   BSD LICENSE
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/*****************************************************************************
 * @file e_qat.c
 *
 * This file provides an implementaion for fork in QAT engine
 *
 *****************************************************************************/

/* macros defined to allow use of the cpu get and set affinity functions */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif

#ifndef __USE_GNU
# define __USE_GNU
#endif

/* Standard Includes */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <fcntl.h>

/* Local Includes */
#include "qat_fork.h"
#include "qat_utils.h"
#include "e_qat_err.h"

/* OpenSSL Includes */
#include <openssl/err.h>

/* QAT includes */
#ifdef USE_QAT_CONTIG_MEM
# include "qae_mem_utils.h"
#endif
#ifdef USE_QAE_MEM
# include "cmn_mem_drv_inf.h"
#endif
#include "cpa.h"
#include "cpa_types.h"

void engine_init_child_at_fork_handler(void)
{
    /* Reinitialise the engine */
    ENGINE* e = ENGINE_by_id(engine_qat_id);
    if (NULL == e) {
        WARN("Engine pointer is NULL\n");
        QATerr(QAT_F_ENGINE_INIT_CHILD_AT_FORK_HANDLER, QAT_R_ENGINE_NULL);
        return;
    }

    if (qat_engine_init(e) != 1) {
        WARN("Failure in qat_engine_init function\n");
        QATerr(QAT_F_ENGINE_INIT_CHILD_AT_FORK_HANDLER, QAT_R_ENGINE_INIT_FAILURE);
    }
    ENGINE_free(e);
}

void engine_finish_before_fork_handler(void)
{
    /* Reset the engine preserving the value of global variables */
    ENGINE* e = ENGINE_by_id(engine_qat_id);
    if (NULL == e) {
        WARN("Engine pointer is NULL\n");
        QATerr(QAT_F_ENGINE_FINISH_BEFORE_FORK_HANDLER, QAT_R_ENGINE_NULL);
        return;
    }

    qat_engine_finish_int(e, QAT_RETAIN_GLOBALS);
    ENGINE_free(e);

    keep_polling = 1;
}

int qat_set_instance_for_thread(long instanceNum)
{
    thread_local_variables_t *tlv = NULL;
    tlv = qat_check_create_local_variables();
    if (NULL == tlv || 0 == qat_num_instances) {
        WARN("could not create local variables or no instances available\n");
        QATerr(QAT_F_QAT_SET_INSTANCE_FOR_THREAD, QAT_R_SET_INSTANCE_FAILURE);
        return 0;
    }

    tlv->qatInstanceForThread =
        qat_instance_handles[instanceNum % qat_num_instances];
    enable_instance_for_thread = 1;
    return 1;
}