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
  14 int 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 }