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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 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 <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/queue.h>
#include <rte_launch.h>
#include <rte_memory.h>
#include <rte_eal.h>
#include <rte_atomic.h>
#include <rte_pause.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
/*
* Wait until a lcore finished its job.
*/
int
rte_eal_wait_lcore(unsigned slave_id)
{
if (lcore_config[slave_id].state == WAIT)
return 0;
while (lcore_config[slave_id].state != WAIT &&
lcore_config[slave_id].state != FINISHED)
rte_pause();
rte_rmb();
/* we are in finished state, go to wait state */
lcore_config[slave_id].state = WAIT;
return lcore_config[slave_id].ret;
}
/*
* Check that every SLAVE lcores are in WAIT state, then call
* rte_eal_remote_launch() for all of them. If call_master is true
* (set to CALL_MASTER), also call the function on the master lcore.
*/
int
rte_eal_mp_remote_launch(int (*f)(void *), void *arg,
enum rte_rmt_call_master_t call_master)
{
int lcore_id;
int master = rte_get_master_lcore();
/* check state of lcores */
RTE_LCORE_FOREACH_SLAVE(lcore_id) {
if (lcore_config[lcore_id].state != WAIT)
return -EBUSY;
}
/* send messages to cores */
RTE_LCORE_FOREACH_SLAVE(lcore_id) {
rte_eal_remote_launch(f, arg, lcore_id);
}
if (call_master == CALL_MASTER) {
lcore_config[master].ret = f(arg);
lcore_config[master].state = FINISHED;
}
return 0;
}
/*
* Return the state of the lcore identified by slave_id.
*/
enum rte_lcore_state_t
rte_eal_get_lcore_state(unsigned lcore_id)
{
return lcore_config[lcore_id].state;
}
/*
* Do a rte_eal_wait_lcore() for every lcore. The return values are
* ignored.
*/
void
rte_eal_mp_wait_lcore(void)
{
unsigned lcore_id;
RTE_LCORE_FOREACH_SLAVE(lcore_id) {
rte_eal_wait_lcore(lcore_id);
}
}
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