ceph/src/seastar/dpdk/lib/librte_eal/common/eal_hugepages.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef EAL_HUGEPAGES_H
   6 #define EAL_HUGEPAGES_H
   7
   8 #include <stddef.h>
   9 #include <stdint.h>
  10 #include <limits.h>
  11
  12 #define MAX_HUGEPAGE_PATH PATH_MAX
  13
  14 /**
  15  * Structure used to store informations about hugepages that we mapped
  16  * through the files in hugetlbfs.
  17  */
  18 struct hugepage_file {
  19         void *orig_va;      /**< virtual addr of first mmap() */
  20         void *final_va;     /**< virtual addr of 2nd mmap() */
  21         uint64_t physaddr;  /**< physical addr */
  22         size_t size;        /**< the page size */
  23         int socket_id;      /**< NUMA socket ID */
  24         int file_id;        /**< the '%d' in HUGEFILE_FMT */
  25         char filepath[MAX_HUGEPAGE_PATH]; /**< path to backing file on filesystem */
  26 };
  27
  28 /**
  29  * Read the information on what hugepages are available for the EAL to use,
  30  * clearing out any unused ones.
  31  */
  32 int eal_hugepage_info_init(void);
  33
  34 /**
  35  * Read whatever information primary process has shared about hugepages into
  36  * secondary process.
  37  */
  38 int eal_hugepage_info_read(void);
  39
  40 #endif /* EAL_HUGEPAGES_H */