Eric Lee / smarc-fsl-linux-kernel

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tools/power/cpupower/utils/cpupower-set.c 2.95 KB
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7fe2f6399   Dominik Brodowski   cpupowerutils - c... 
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  /*
   *  (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
   *
   *  Licensed under the terms of the GNU GPL License version 2.
   */
  
  
  #include <unistd.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <errno.h>
  #include <string.h>
  #include <getopt.h>
  
  #include <cpufreq.h>
  #include "helpers/helpers.h"
  #include "helpers/sysfs.h"
  #include "helpers/bitmask.h"
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  static struct option set_opts[] = {
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  	{ .name = "perf-bias",	.has_arg = optional_argument,	.flag = NULL,	.val = 'b'},
  	{ .name = "sched-mc",	.has_arg = optional_argument,	.flag = NULL,	.val = 'm'},
  	{ .name = "sched-smt",	.has_arg = optional_argument,	.flag = NULL,	.val = 's'},
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  	{ },
  };
  
  static void print_wrong_arg_exit(void)
  {
  	printf(_("invalid or unknown argument
  "));
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  	exit(EXIT_FAILURE);
  }
  
  int cmd_set(int argc, char **argv)
  {
  	extern char *optarg;
  	extern int optind, opterr, optopt;
  	unsigned int cpu;
  
  	union {
  		struct {
  			int sched_mc:1;
  			int sched_smt:1;
  			int perf_bias:1;
  		};
  		int params;
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  	} params;
  	int sched_mc = 0, sched_smt = 0, perf_bias = 0;
  	int ret = 0;
  
  	setlocale(LC_ALL, "");
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  	textdomain(PACKAGE);
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  	params.params = 0;
  	/* parameter parsing */
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  	while ((ret = getopt_long(argc, argv, "m:s:b:",
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  						set_opts, NULL)) != -1) {
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  		switch (ret) {
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  		case 'b':
  			if (params.perf_bias)
  				print_wrong_arg_exit();
  			perf_bias = atoi(optarg);
  			if (perf_bias < 0 || perf_bias > 15) {
  				printf(_("--perf-bias param out "
  					 "of range [0-%d]
  "), 15);
  				print_wrong_arg_exit();
  			}
  			params.perf_bias = 1;
  			break;
  		case 'm':
  			if (params.sched_mc)
  				print_wrong_arg_exit();
  			sched_mc = atoi(optarg);
  			if (sched_mc < 0 || sched_mc > 2) {
  				printf(_("--sched-mc param out "
  					 "of range [0-%d]
  "), 2);
  				print_wrong_arg_exit();
  			}
  			params.sched_mc = 1;
  			break;
  		case 's':
  			if (params.sched_smt)
  				print_wrong_arg_exit();
  			sched_smt = atoi(optarg);
  			if (sched_smt < 0 || sched_smt > 2) {
  				printf(_("--sched-smt param out "
  					 "of range [0-%d]
  "), 2);
  				print_wrong_arg_exit();
  			}
  			params.sched_smt = 1;
  			break;
  		default:
  			print_wrong_arg_exit();
  		}
  	};
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  	if (!params.params)
  		print_wrong_arg_exit();
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  	if (params.sched_mc) {
  		ret = sysfs_set_sched("mc", sched_mc);
  		if (ret)
  			fprintf(stderr, _("Error setting sched-mc %s
  "),
  				(ret == -ENODEV) ? "not supported" : "");
  	}
  	if (params.sched_smt) {
  		ret = sysfs_set_sched("smt", sched_smt);
  		if (ret)
  			fprintf(stderr, _("Error setting sched-smt %s
  "),
  				(ret == -ENODEV) ? "not supported" : "");
  	}
  
  	/* Default is: set all CPUs */
  	if (bitmask_isallclear(cpus_chosen))
  		bitmask_setall(cpus_chosen);
  
  	/* loop over CPUs */
  	for (cpu = bitmask_first(cpus_chosen);
  	     cpu <= bitmask_last(cpus_chosen); cpu++) {
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7fe2f6399
 
 Dominik Brodowski
 
cpupowerutils - c...




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  		if (!bitmask_isbitset(cpus_chosen, cpu) ||
  		    cpufreq_cpu_exists(cpu))
  			continue;
  
  		if (params.perf_bias) {
  			ret = msr_intel_set_perf_bias(cpu, perf_bias);
  			if (ret) {
  				fprintf(stderr, _("Error setting perf-bias "
  						  "value on CPU %d
  "), cpu);
  				break;
  			}
  		}
  	}
  	return ret;
  }