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util: promote qemu_egl_rendernode_open() to libqemuutil

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vhost-user-gpu will share the same code to open a DRM node.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180713130916.4153-20-marcandre.lureau@redhat.com>

[ kraxel: buildfix: util/drm.o must be CONFIG_OPENGL not CONFIG_LINUX ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-07-13 15:09:06 +02:00 committed by Gerd Hoffmann
parent 242d01336d
commit b1d380372f
5 changed files with 76 additions and 49 deletions
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1
MAINTAINERS
View File

@ -1566,6 +1566,7 @@ S: Odd Fixes
F: ui/
F: include/ui/
F: qapi/ui.json
F: util/drm.c
Cocoa graphics
M: Peter Maydell <peter.maydell@linaro.org>

6
include/qemu/drm.h Normal file
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@ -0,0 +1,6 @@
#ifndef QEMU_DRM_H_
#define QEMU_DRM_H_
int qemu_drm_rendernode_open(const char *rendernode);
#endif

51
ui/egl-helpers.c
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@ -15,9 +15,7 @@
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include <glob.h>
#include <dirent.h>
#include "qemu/drm.h"
#include "qemu/error-report.h"
#include "ui/console.h"
#include "ui/egl-helpers.h"
@ -147,57 +145,12 @@ int qemu_egl_rn_fd;
struct gbm_device *qemu_egl_rn_gbm_dev;
EGLContext qemu_egl_rn_ctx;
static int qemu_egl_rendernode_open(const char *rendernode)
{
DIR *dir;
struct dirent *e;
int r, fd;
char *p;
if (rendernode) {
return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
}
dir = opendir("/dev/dri");
if (!dir) {
return -1;
}
fd = -1;
while ((e = readdir(dir))) {
if (e->d_type != DT_CHR) {
continue;
}
if (strncmp(e->d_name, "renderD", 7)) {
continue;
}
p = g_strdup_printf("/dev/dri/%s", e->d_name);
r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
if (r < 0) {
g_free(p);
continue;
}
fd = r;
g_free(p);
break;
}
closedir(dir);
if (fd < 0) {
return -1;
}
return fd;
}
int egl_rendernode_init(const char *rendernode, DisplayGLMode mode)
{
qemu_egl_rn_fd = -1;
int rc;
qemu_egl_rn_fd = qemu_egl_rendernode_open(rendernode);
qemu_egl_rn_fd = qemu_drm_rendernode_open(rendernode);
if (qemu_egl_rn_fd == -1) {
error_report("egl: no drm render node available");
goto err;

1
util/Makefile.objs
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@ -49,3 +49,4 @@ util-obj-y += stats64.o
util-obj-y += systemd.o
util-obj-y += iova-tree.o
util-obj-$(CONFIG_LINUX) += vfio-helpers.o
util-obj-$(CONFIG_OPENGL) += drm.o

66
util/drm.c Normal file
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@ -0,0 +1,66 @@
/*
* Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/drm.h"
#include <glob.h>
#include <dirent.h>
int qemu_drm_rendernode_open(const char *rendernode)
{
DIR *dir;
struct dirent *e;
int r, fd;
char *p;
if (rendernode) {
return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
}
dir = opendir("/dev/dri");
if (!dir) {
return -1;
}
fd = -1;
while ((e = readdir(dir))) {
if (e->d_type != DT_CHR) {
continue;
}
if (strncmp(e->d_name, "renderD", 7)) {
continue;
}
p = g_strdup_printf("/dev/dri/%s", e->d_name);
r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
if (r < 0) {
g_free(p);
continue;
}
fd = r;
g_free(p);
break;
}
closedir(dir);
if (fd < 0) {
return -1;
}
return fd;
}