LXR qemu/ui/udmabuf.c

   1/*
   2 * udmabuf helper functions.
   3 *
   4 * This work is licensed under the terms of the GNU GPL, version 2 or later.
   5 * See the COPYING file in the top-level directory.
   6 */
   7#include "qemu/osdep.h"
   8#include "qapi/error.h"
   9#include "ui/console.h"
  10
  11#include <fcntl.h>
  12#include <sys/ioctl.h>
  13
  14int udmabuf_fd(void)
  15{
  16    static bool first = true;
  17    static int udmabuf;
  18
  19    if (!first) {
  20        return udmabuf;
  21    }
  22    first = false;
  23
  24    udmabuf = open("/dev/udmabuf", O_RDWR);
  25    if (udmabuf < 0) {
  26        warn_report("open /dev/udmabuf: %s", strerror(errno));
  27    }
  28    return udmabuf;
  29}
  30