attr_test.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * PAPR Energy attributes sniff test
  4 * This checks if the papr folders and contents are populated relating to
  5 * the energy and frequency attributes
  6 *
  7 * Copyright 2022, Pratik Rajesh Sampat, IBM Corp.
  8 */
  9
 10#include <errno.h>
 11#include <stdio.h>
 12#include <string.h>
 13#include <dirent.h>
 14#include <sys/types.h>
 15#include <sys/stat.h>
 16#include <unistd.h>
 17#include <stdlib.h>
 18
 19#include "utils.h"
 20
 21enum energy_freq_attrs {
 22	POWER_PERFORMANCE_MODE = 1,
 23	IDLE_POWER_SAVER_STATUS = 2,
 24	MIN_FREQ = 3,
 25	STAT_FREQ = 4,
 26	MAX_FREQ = 6,
 27	PROC_FOLDING_STATUS = 8
 28};
 29
 30enum type {
 31	INVALID,
 32	STR_VAL,
 33	NUM_VAL
 34};
 35
 36static int value_type(int id)
 37{
 38	int val_type;
 39
 40	switch (id) {
 41	case POWER_PERFORMANCE_MODE:
 42	case IDLE_POWER_SAVER_STATUS:
 43		val_type = STR_VAL;
 44		break;
 45	case MIN_FREQ:
 46	case STAT_FREQ:
 47	case MAX_FREQ:
 48	case PROC_FOLDING_STATUS:
 49		val_type = NUM_VAL;
 50		break;
 51	default:
 52		val_type = INVALID;
 53	}
 54
 55	return val_type;
 56}
 57
 58static int verify_energy_info(void)
 59{
 60	const char *path = "/sys/firmware/papr/energy_scale_info";
 61	struct dirent *entry;
 62	struct stat s;
 63	DIR *dirp;
 64
 65	errno = 0;
 66	if (stat(path, &s)) {
 67		SKIP_IF(errno == ENOENT);
 68		FAIL_IF(errno);
 69	}
 70
 71	FAIL_IF(!S_ISDIR(s.st_mode));
 72
 73	dirp = opendir(path);
 74
 75	while ((entry = readdir(dirp)) != NULL) {
 76		char file_name[64];
 77		int id, attr_type;
 78		FILE *f;
 79
 80		if (strcmp(entry->d_name, ".") == 0 ||
 81		    strcmp(entry->d_name, "..") == 0)
 82			continue;
 83
 84		id = atoi(entry->d_name);
 85		attr_type = value_type(id);
 86		FAIL_IF(attr_type == INVALID);
 87
 88		/* Check if the files exist and have data in them */
 89		sprintf(file_name, "%s/%d/desc", path, id);
 90		f = fopen(file_name, "r");
 91		FAIL_IF(!f);
 92		FAIL_IF(fgetc(f) == EOF);
 93
 94		sprintf(file_name, "%s/%d/value", path, id);
 95		f = fopen(file_name, "r");
 96		FAIL_IF(!f);
 97		FAIL_IF(fgetc(f) == EOF);
 98
 99		if (attr_type == STR_VAL) {
100			sprintf(file_name, "%s/%d/value_desc", path, id);
101			f = fopen(file_name, "r");
102			FAIL_IF(!f);
103			FAIL_IF(fgetc(f) == EOF);
104		}
105	}
106
107	return 0;
108}
109
110int main(void)
111{
112	return test_harness(verify_energy_info, "papr_attributes");
113}