Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_eal / common / eal_hugepages.h

diff --git a/lib/librte_eal/common/eal_hugepages.h b/lib/librte_eal/common/eal_hugepages.h
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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.
+ */
+
+#ifndef EAL_HUGEPAGES_H
+#define EAL_HUGEPAGES_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <limits.h>
+
+#define MAX_HUGEPAGE_PATH PATH_MAX
+
+/**
+ * Structure used to store informations about hugepages that we mapped
+ * through the files in hugetlbfs.
+ */
+struct hugepage_file {
+       void *orig_va;      /**< virtual addr of first mmap() */
+       void *final_va;     /**< virtual addr of 2nd mmap() */
+       uint64_t physaddr;  /**< physical addr */
+       size_t size;        /**< the page size */
+       int socket_id;      /**< NUMA socket ID */
+       int file_id;        /**< the '%d' in HUGEFILE_FMT */
+       int memseg_id;      /**< the memory segment to which page belongs */
+#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS
+       int repeated;           /**< number of times the page size is repeated */
+#endif
+       char filepath[MAX_HUGEPAGE_PATH]; /**< path to backing file on filesystem */
+};
+
+/**
+ * Read the information from linux on what hugepages are available
+ * for the EAL to use
+ */
+int eal_hugepage_info_init(void);
+
+#endif /* EAL_HUGEPAGES_H */