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}
114