/**
 * Looking Glass
 * Copyright © 2017-2024 The Looking Glass Authors
 * https://looking-glass.io
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef _H_LG_COMMON_IVSHMEM_
#define _H_LG_COMMON_IVSHMEM_

#include <stdbool.h>
#include <stdint.h>

struct IVSHMEM
{
  unsigned int   size;
  void         * mem;

  // internal use
  void * opaque;
};

void ivshmemOptionsInit(void);
bool ivshmemInit(struct IVSHMEM * dev);
bool ivshmemOpen(struct IVSHMEM * dev);
bool ivshmemOpenDev(struct IVSHMEM * dev, const char * shmDev);
void ivshmemClose(struct IVSHMEM * dev);
void ivshmemFree(struct IVSHMEM * dev);

/* Linux KVMFR support only for now (VM->VM) */
bool ivshmemHasDMA   (struct IVSHMEM * dev);
int  ivshmemGetDMABuf(struct IVSHMEM * dev, uint64_t offset, uint64_t size);

#endif
