qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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udmabuf.c (588B)

      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 }