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lib/drmtest: add drmtest_disable/enable_prefault() function

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V2: add exit handler to enable prefault (Daniel)

Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
This commit is contained in:
Xiong Zhang 2013-07-19 18:42:51 +08:00 committed by Daniel Vetter
parent 161e610765
commit 7ea2983b11
2 changed files with 53 additions and 0 deletions
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50
lib/drmtest.c
View File

@ -1605,3 +1605,53 @@ void kmstest_free_connector_config(struct kmstest_connector_config *config)
drmModeFreeEncoder(config->encoder);
drmModeFreeConnector(config->connector);
}
#define PREFAULT_DEBUGFS "/sys/module/i915/parameters/prefault_disable"
static int drmtest_prefault_control(bool enable)
{
char *name = PREFAULT_DEBUGFS;
int fd;
char buf[2] = {'Y', 'N'};
int index;
int result = 0;
fd = open(name, O_RDWR);
if (fd == -1) {
fprintf(stderr, "Couldn't open prefault_debugfs.%s\n",
strerror(errno));
return -1;
}
if (enable)
index = 1;
else
index = 0;
if (write(fd, &buf[index], 1) != 1) {
fprintf(stderr, "write prefault_debugfs error.%s\n",
strerror(errno));
result = -1;
}
close(fd);
return result;
}
static void enable_prefault_at_exit(int sig)
{
drmtest_enable_prefault();
}
int drmtest_disable_prefault(void)
{
drmtest_install_exit_handler(enable_prefault_at_exit);
return drmtest_prefault_control(false);
}
int drmtest_enable_prefault(void)
{
return drmtest_prefault_control(true);
}

3
lib/drmtest.h
View File

@ -180,3 +180,6 @@ void drmtest_enable_exit_handler(void);
void drmtest_disable_exit_handler(void);
int drmtest_set_vt_graphics_mode(void);
int drmtest_disable_prefault(void);
int drmtest_enable_prefault(void);