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 #ifdef CONFIG_LINUX
  12
  13 #include <fcntl.h>
  14 #include <sys/ioctl.h>
  15
  16 int udmabuf_fd(void)
  17 {
  18     static bool first = true;
  19     static int udmabuf;
  20
  21     if (!first) {
  22         return udmabuf;
  23     }
  24     first = false;
  25
  26     udmabuf = open("/dev/udmabuf", O_RDWR);
  27     if (udmabuf < 0) {
  28         warn_report("open /dev/udmabuf: %s", strerror(errno));
  29     }
  30     return udmabuf;
  31 }
  32
  33 #else
  34
  35 int udmabuf_fd(void)
  36 {
  37     return -1;
  38 }
  39
  40 #endif