| 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 | } |