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/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "igt.h"
#include "igt_gvt.h"
#include <dirent.h>
#include <unistd.h>
#include <fcntl.h>
static bool is_gvt_enabled(void)
{
FILE *file;
int value;
bool enabled = false;
file = fopen("/sys/module/i915/parameters/enable_gvt", "r");
if (!file)
return false;
if (fscanf(file, "%d", &value) == 1)
enabled = value;
fclose(file);
errno = 0;
return enabled;
}
static void unbind_fbcon(void)
{
char buf[128];
const char *path = "/sys/class/vtconsole";
DIR *dir;
struct dirent *vtcon;
dir = opendir(path);
if (!dir)
return;
while ((vtcon = readdir(dir))) {
int fd, len;
if (strncmp(vtcon->d_name, "vtcon", 5))
continue;
sprintf(buf, "%s/%s/name", path, vtcon->d_name);
fd = open(buf, O_RDONLY);
if (fd < 0)
continue;
len = read(fd, buf, sizeof(buf) - 1);
close(fd);
if (len >= 0)
buf[len] = '\0';
if (strstr(buf, "frame buffer device")) {
sprintf(buf, "%s/%s/bind", path, vtcon->d_name);
fd = open(buf, O_WRONLY);
if (fd != -1) {
igt_ignore_warn(write(fd, "1\n", 2));
close(fd);
}
break;
}
}
closedir(dir);
}
static void unload_i915(void)
{
unbind_fbcon();
/* pkill alsact */
igt_ignore_warn(system("/sbin/modprobe -s -r i915"));
}
bool igt_gvt_load_module(void)
{
if (is_gvt_enabled())
return true;
unload_i915();
igt_ignore_warn(system("/sbin/modprobe -s i915 enable_gvt=1"));
return is_gvt_enabled();
}
void igt_gvt_unload_module(void)
{
if (!is_gvt_enabled())
return;
unload_i915();
igt_ignore_warn(system("/sbin/modprobe -s i915 enable_gvt=0"));
igt_assert(!is_gvt_enabled());
}
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