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ui: Get the fd associated with udmabuf driver

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Try to open the udmabuf dev node for the first time or return the
fd if the device was previously opened.

Based-on-patch-by: Gerd Hoffmann <kraxel@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Message-Id: <20210526231429.1045476-2-vivek.kasireddy@intel.com>

[ kraxel: fixup fcntl.h include ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Vivek Kasireddy 2021-05-26 16:14:16 -07:00 committed by Gerd Hoffmann
parent ce7015d9e8
commit 87f12216d9
3 changed files with 44 additions and 0 deletions
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3
include/ui/console.h
View File

@ -471,4 +471,7 @@ bool vnc_display_reload_certs(const char *id, Error **errp);
/* input.c */
int index_from_key(const char *key, size_t key_length);
/* udmabuf.c */
int udmabuf_fd(void);
#endif

1
ui/meson.build
View File

@ -12,6 +12,7 @@ softmmu_ss.add(files(
'kbd-state.c',
'keymaps.c',
'qemu-pixman.c',
'udmabuf.c',
))
softmmu_ss.add([spice_headers, files('spice-module.c')])
softmmu_ss.add(when: spice_protocol, if_true: files('vdagent.c'))

40
ui/udmabuf.c Normal file
View File

@ -0,0 +1,40 @@
/*
* udmabuf helper functions.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "ui/console.h"
#ifdef CONFIG_LINUX
#include <fcntl.h>
#include <sys/ioctl.h>
int udmabuf_fd(void)
{
static bool first = true;
static int udmabuf;
if (!first) {
return udmabuf;
}
first = false;
udmabuf = open("/dev/udmabuf", O_RDWR);
if (udmabuf < 0) {
warn_report("open /dev/udmabuf: %s", strerror(errno));
}
return udmabuf;
}
#else
int udmabuf_fd(void)
{
return -1;
}
#endif