Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_eal / common / eal_common_launch.c

diff --git a/lib/librte_eal/common/eal_common_launch.c b/lib/librte_eal/common/eal_common_launch.c
new file mode 100644 (file)
index 0000000..229c3a0
--- /dev/null
+++ b/lib/librte_eal/common/eal_common_launch.c
@@ -0,0 +1,118 @@
+/*-
+ *   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_memzone.h>
+#include <rte_eal.h>
+#include <rte_atomic.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_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);
+       }
+}