Imported Upstream version 16.07-rc1

[deb_dpdk.git] / lib / librte_mempool / rte_mempool_ring.c

diff --git a/lib/librte_mempool/rte_mempool_ring.c b/lib/librte_mempool/rte_mempool_ring.c
new file mode 100644 (file)
index 0000000..b9aa64d
--- /dev/null
+++ b/lib/librte_mempool/rte_mempool_ring.c
@@ -0,0 +1,161 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2016 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 <stdio.h>
+#include <string.h>
+
+#include <rte_errno.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+
+static int
+common_ring_mp_enqueue(struct rte_mempool *mp, void * const *obj_table,
+               unsigned n)
+{
+       return rte_ring_mp_enqueue_bulk(mp->pool_data, obj_table, n);
+}
+
+static int
+common_ring_sp_enqueue(struct rte_mempool *mp, void * const *obj_table,
+               unsigned n)
+{
+       return rte_ring_sp_enqueue_bulk(mp->pool_data, obj_table, n);
+}
+
+static int
+common_ring_mc_dequeue(struct rte_mempool *mp, void **obj_table, unsigned n)
+{
+       return rte_ring_mc_dequeue_bulk(mp->pool_data, obj_table, n);
+}
+
+static int
+common_ring_sc_dequeue(struct rte_mempool *mp, void **obj_table, unsigned n)
+{
+       return rte_ring_sc_dequeue_bulk(mp->pool_data, obj_table, n);
+}
+
+static unsigned
+common_ring_get_count(const struct rte_mempool *mp)
+{
+       return rte_ring_count(mp->pool_data);
+}
+
+
+static int
+common_ring_alloc(struct rte_mempool *mp)
+{
+       int rg_flags = 0, ret;
+       char rg_name[RTE_RING_NAMESIZE];
+       struct rte_ring *r;
+
+       ret = snprintf(rg_name, sizeof(rg_name),
+               RTE_MEMPOOL_MZ_FORMAT, mp->name);
+       if (ret < 0 || ret >= (int)sizeof(rg_name)) {
+               rte_errno = ENAMETOOLONG;
+               return -rte_errno;
+       }
+
+       /* ring flags */
+       if (mp->flags & MEMPOOL_F_SP_PUT)
+               rg_flags |= RING_F_SP_ENQ;
+       if (mp->flags & MEMPOOL_F_SC_GET)
+               rg_flags |= RING_F_SC_DEQ;
+
+       /*
+        * Allocate the ring that will be used to store objects.
+        * Ring functions will return appropriate errors if we are
+        * running as a secondary process etc., so no checks made
+        * in this function for that condition.
+        */
+       r = rte_ring_create(rg_name, rte_align32pow2(mp->size + 1),
+               mp->socket_id, rg_flags);
+       if (r == NULL)
+               return -rte_errno;
+
+       mp->pool_data = r;
+
+       return 0;
+}
+
+static void
+common_ring_free(struct rte_mempool *mp)
+{
+       rte_ring_free(mp->pool_data);
+}
+
+/*
+ * The following 4 declarations of mempool ops structs address
+ * the need for the backward compatible mempool handlers for
+ * single/multi producers and single/multi consumers as dictated by the
+ * flags provided to the rte_mempool_create function
+ */
+static const struct rte_mempool_ops ops_mp_mc = {
+       .name = "ring_mp_mc",
+       .alloc = common_ring_alloc,
+       .free = common_ring_free,
+       .enqueue = common_ring_mp_enqueue,
+       .dequeue = common_ring_mc_dequeue,
+       .get_count = common_ring_get_count,
+};
+
+static const struct rte_mempool_ops ops_sp_sc = {
+       .name = "ring_sp_sc",
+       .alloc = common_ring_alloc,
+       .free = common_ring_free,
+       .enqueue = common_ring_sp_enqueue,
+       .dequeue = common_ring_sc_dequeue,
+       .get_count = common_ring_get_count,
+};
+
+static const struct rte_mempool_ops ops_mp_sc = {
+       .name = "ring_mp_sc",
+       .alloc = common_ring_alloc,
+       .free = common_ring_free,
+       .enqueue = common_ring_mp_enqueue,
+       .dequeue = common_ring_sc_dequeue,
+       .get_count = common_ring_get_count,
+};
+
+static const struct rte_mempool_ops ops_sp_mc = {
+       .name = "ring_sp_mc",
+       .alloc = common_ring_alloc,
+       .free = common_ring_free,
+       .enqueue = common_ring_sp_enqueue,
+       .dequeue = common_ring_mc_dequeue,
+       .get_count = common_ring_get_count,
+};
+
+MEMPOOL_REGISTER_OPS(ops_mp_mc);
+MEMPOOL_REGISTER_OPS(ops_sp_sc);
+MEMPOOL_REGISTER_OPS(ops_mp_sc);
+MEMPOOL_REGISTER_OPS(ops_sp_mc);