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/*
* Copyright © 2011 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.
*
* Authors:
* Ben Widawsky <ben@bwidawsk.net>
*
*/
#include <assert.h>
#include <err.h>
#include <string.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <unistd.h>
#include "intel_io.h"
#include "intel_chipset.h"
bool daemonized;
#define INFO_PRINT(...) \
do { \
if (daemonized) \
syslog(LOG_INFO, ##__VA_ARGS__); \
else \
fprintf(stdout, ##__VA_ARGS__); \
} while(0)
static void
help(char *prog) {
printf("%s Prevents the GT from sleeping.\n\n", prog);
printf("usage: %s [options] \n\n", prog);
printf("Options: \n");
printf(" -b Run in background/daemon mode\n");
}
static int
is_alive(void) {
/* Read the timestamp, which should *almost* always be !0 */
return (intel_register_read(0x2358) != 0);
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 2 || (argc == 2 && !strncmp(argv[1], "-h", 2))) {
help(argv[1]);
exit(0);
}
if (argc == 2 && (!strncmp(argv[1], "-b", 2)))
daemonized = true;
if (daemonized) {
assert(daemon(0, 0) == 0);
openlog(argv[0], LOG_CONS | LOG_PID, LOG_USER);
INFO_PRINT("started daemon");
}
ret = intel_register_access_init(intel_get_pci_device(), 1);
if (ret) {
INFO_PRINT("Couldn't init register access\n");
exit(1);
} else {
INFO_PRINT("Forcewake locked\n");
}
while(1) {
if (!is_alive()) {
INFO_PRINT("gpu reset? restarting daemon\n");
intel_register_access_fini();
ret = intel_register_access_init(intel_get_pci_device(), 1);
if (ret)
INFO_PRINT("Reg access init fail\n");
}
sleep(1);
}
intel_register_access_fini();
INFO_PRINT("Forcewake unlock\n");
if (daemonized) {
INFO_PRINT("finished\n");
closelog();
}
return 0;
}
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