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110 lines
2.8 KiB
110 lines
2.8 KiB
4 months ago
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/*
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* Copyright © 2011 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Ben Widawsky <ben@bwidawsk.net>
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*
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*/
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#include <assert.h>
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#include <err.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include <unistd.h>
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#include "intel_io.h"
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#include "intel_chipset.h"
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#include "drmtest.h"
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bool daemonized;
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#define INFO_PRINT(...) \
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do { \
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if (daemonized) \
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syslog(LOG_INFO, ##__VA_ARGS__); \
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else \
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fprintf(stdout, ##__VA_ARGS__); \
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} while(0)
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static void
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help(char *prog) {
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printf("%s Prevents the GT from sleeping.\n\n", prog);
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printf("usage: %s [options] \n\n", prog);
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printf("Options: \n");
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printf(" -b Run in background/daemon mode\n");
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}
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static int
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is_alive(void) {
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/* Read the timestamp, which should *almost* always be !0 */
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return (intel_register_read(0x2358) != 0);
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}
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int main(int argc, char *argv[])
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{
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int ret;
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if (argc > 2 || (argc == 2 && !strncmp(argv[1], "-h", 2))) {
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help(argv[1]);
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exit(0);
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}
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if (argc == 2 && (!strncmp(argv[1], "-b", 2)))
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daemonized = true;
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if (daemonized) {
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assert(daemon(0, 0) == 0);
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openlog(argv[0], LOG_CONS | LOG_PID, LOG_USER);
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INFO_PRINT("started daemon");
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}
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ret = intel_register_access_init(intel_get_pci_device(), 1, -1);
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if (ret) {
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INFO_PRINT("Couldn't init register access\n");
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exit(1);
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} else {
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INFO_PRINT("Forcewake locked\n");
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}
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while(1) {
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if (!is_alive()) {
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INFO_PRINT("gpu reset? restarting daemon\n");
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intel_register_access_fini();
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ret = intel_register_access_init(intel_get_pci_device(), 1, -1);
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if (ret)
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INFO_PRINT("Reg access init fail\n");
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}
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sleep(1);
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}
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intel_register_access_fini();
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INFO_PRINT("Forcewake unlock\n");
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if (daemonized) {
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INFO_PRINT("finished\n");
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closelog();
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}
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return 0;
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}
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