ceph/src/spdk/intel-ipsec-mb/alloc.c

   1 /*******************************************************************************
   2   Copyright (c) 2018, Intel Corporation
   3
   4   Redistribution and use in source and binary forms, with or without
   5   modification, are permitted provided that the following conditions are met:
   6
   7       * Redistributions of source code must retain the above copyright notice,
   8         this list of conditions and the following disclaimer.
   9       * Redistributions in binary form must reproduce the above copyright
  10         notice, this list of conditions and the following disclaimer in the
  11         documentation and/or other materials provided with the distribution.
  12       * Neither the name of Intel Corporation nor the names of its contributors
  13         may be used to endorse or promote products derived from this software
  14         without specific prior written permission.
  15
  16   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  20   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23   CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 *******************************************************************************/
  27
  28 #include <stdint.h>
  29 #ifdef LINUX
  30 #include <stdlib.h> /* posix_memalign() and free() */
  31 #else
  32 #include <malloc.h> /* _aligned_malloc() and aligned_free() */
  33 #endif
  34 #include "intel-ipsec-mb.h"
  35
  36 /**
  37  * @brief Allocates memory for multi-buffer manager instance
  38  *
  39  * For binary compatibility between library versions
  40  * it is recommended to use this API.
  41  *
  42  * @param flags multi-buffer manager flags
  43  *     IMB_FLAG_SHANI_OFF - disable use (and detection) of SHA extenstions,
  44  *                          currently SHANI is only available for SSE
  45  *
  46  * @return Pointer to allocated memory for MB_MGR structure
  47  * @retval NULL on allocation error
  48  */
  49 MB_MGR *alloc_mb_mgr(uint64_t flags)
  50 {
  51         const size_t alignment = 64;
  52         const size_t size = sizeof(MB_MGR);
  53         MB_MGR *ptr = NULL;
  54
  55 #ifdef LINUX
  56         if (posix_memalign((void **)&ptr, alignment, size))
  57                 return NULL;
  58 #else
  59         ptr = _aligned_malloc(size, alignment);
  60 #endif
  61         if (ptr != NULL)
  62                 ptr->flags = flags; /* save the flags for future use in init */
  63
  64         IMB_ASSERT(ptr != NULL);
  65         return ptr;
  66 }
  67
  68 /**
  69  * @brief Frees memory allocated previously by alloc_mb_mgr()
  70  *
  71  * @param ptr a pointer to allocated MB_MGR structure
  72  *
  73  */
  74 void free_mb_mgr(MB_MGR *ptr)
  75 {
  76         IMB_ASSERT(ptr != NULL);
  77 #ifdef LINUX
  78         free(ptr);
  79 #else
  80         _aligned_free(ptr);
  81 #endif
  82 }