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 #include "qemu/error-report.h" 11 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 } 30