#ifndef _LINUX_VIRTWL_H
#define _LINUX_VIRTWL_H

#include <asm/ioctl.h>
#include <linux/types.h>

#define VIRTWL_SEND_MAX_ALLOCS 28

#define VIRTWL_IOCTL_BASE 'w'
#define VIRTWL_IO(nr) _IO(VIRTWL_IOCTL_BASE, nr)
#define VIRTWL_IOR(nr, type) _IOR(VIRTWL_IOCTL_BASE, nr, type)
#define VIRTWL_IOW(nr, type) _IOW(VIRTWL_IOCTL_BASE, nr, type)
#define VIRTWL_IOWR(nr, type) _IOWR(VIRTWL_IOCTL_BASE, nr, type)

enum virtwl_ioctl_new_type {
  VIRTWL_IOCTL_NEW_CTX,   /* open a new wayland connection context */
  VIRTWL_IOCTL_NEW_ALLOC, /* create a new virtwl shm allocation */
};

struct virtwl_ioctl_new {
  __u32 type;  /* VIRTWL_IOCTL_NEW_* */
  int fd;      /* return fd */
  __u32 flags; /* currently always 0 */
  __u32 size;  /* size of allocation if type == VIRTWL_IOCTL_NEW_ALLOC */
};

struct virtwl_ioctl_txn {
  int fds[VIRTWL_SEND_MAX_ALLOCS];
  __u32 len;
  __u8 data[0];
};

#define VIRTWL_IOCTL_NEW VIRTWL_IOWR(0x00, struct virtwl_ioctl_new)
#define VIRTWL_IOCTL_SEND VIRTWL_IOR(0x01, struct virtwl_ioctl_txn)
#define VIRTWL_IOCTL_RECV VIRTWL_IOW(0x02, struct virtwl_ioctl_txn)
#define VIRTWL_IOCTL_MAXNR 3

#endif /* _LINUX_VIRTWL_H */