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/* This file is part of cputemp2maxfreq.
Copyright (C) 2023-2024 pa4wdh
cputemp2maxfreq is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License , or
(at your option) any later version.
cputemp2maxfreq is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cputemp2maxfreq; see the file COPYING. If not, see
<http://www.gnu.org/licenses>.
*/
#include <fcntl.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <dirent.h>
#include <sys/types.h>
#include <stdlib.h>
#include "debug.h"
#include "sysfs.h"
#include "cputemp2maxfreq.h"
extern struct s_config config;
extern struct s_cpudata cpudata;
// Add a CPU to the list
void cpulist_add(char *cpu)
{
int newlen;
newlen=cpudata.cpulist_len+1;
cpudata.cpulist=reallocarray(cpudata.cpulist,(size_t) newlen,sizeof(char *));
cpudata.cpulist[cpudata.cpulist_len]=malloc(strlen(cpu)+1);
strcpy(cpudata.cpulist[cpudata.cpulist_len],cpu);
cpudata.cpulist[cpudata.cpulist_len][strlen(cpu)]=0;
cpudata.cpulist_len=newlen;
}
// Validate if we found a file named cpu[0-9][0-9][0-9]
int cpulist_is_cpu(char *name)
{
if (strncmp(name,"cpu",3)!=0) return 0;
if ((name[3]<'0') || (name[3]>'9')) return 0;
if (name[4]==0) return 1;
if ((name[4]<'0') || (name[4]>'9')) return 0;
if (name[5]==0) return 1;
if ((name[5]<'0') || (name[5]>'9')) return 0;
if (name[6]==0) return 1;
return 0;
}
// Set a cpufreq parameter to a value
int cpulist_find_cpus()
{
DIR *cpudir;
struct dirent *cpu_dirent;
char sysfs_file[309];
int package;
DEBUG1_CPULIST("Started\n")
if (cpudata.cpulist!=NULL)
{
DEBUG1_CPULIST("cpulist already set, free list first\n");
return -1;
}
cpudata.cpulist_len=0;
// Open the CPU directory in sysfs
cpudir=opendir("/sys/devices/system/cpu");
if (cpudir==NULL)
{
DEBUG1_CPULIST("Unable to find CPU's\n");
return -1;
}
cpu_dirent=readdir(cpudir);
while(cpu_dirent!=NULL)
{
// Check if it's a CPU and it belongs to the correct physical package
if (cpulist_is_cpu(cpu_dirent->d_name))
{
DEBUG2_CPULIST("Found CPU %s\n",cpu_dirent->d_name);
snprintf(sysfs_file,309,"/sys/devices/system/cpu/%s/topology/physical_package_id",cpu_dirent->d_name);
package=(int) sysfs_read_long_int(sysfs_file);
DEBUG2_CPULIST("CPU Belongs to package id %d\n",package);
if ((package==config.cpu) || (config.cpu<0))
{
DEBUG2_CPULIST("Add to list\n");
cpulist_add(cpu_dirent->d_name);
} else {
DEBUG2_CPULIST("Skip this CPU\n");
}
}
cpu_dirent=readdir(cpudir);
}
closedir(cpudir);
DEBUG1_CPULIST("Found %d CPU's\n",config.cpulist_len);
if (cpudata.cpulist_len==0)
{
config.logger("Warning: Found no CPU's beloning to physical CPU %d",config.cpu);
}
return 0;
}
void cpulist_free()
{
int count;
if (cpudata.cpulist==NULL) return;
int len=cpudata.cpulist_len;
cpudata.cpulist_len=0;
for(count=0;count<len;count++) free(cpudata.cpulist[count]);
free(cpudata.cpulist);
cpudata.cpulist=NULL;
}
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