Sathish Ambley | 635292e | 2017-07-17 20:37:08 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| 3 | * Not a contribution |
| 4 | * Copyright (C) 2016 The Android Open Source Project |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | #include <ctype.h> |
| 20 | #include <errno.h> |
| 21 | #include <inttypes.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #define LOG_TAG "ThermalHAL" |
Steven Moreland | cdd8c78 | 2018-03-27 10:09:21 -0700 | [diff] [blame] | 26 | #include <log/log.h> |
Sathish Ambley | 635292e | 2017-07-17 20:37:08 -0700 | [diff] [blame] | 27 | |
| 28 | #include <hardware/hardware.h> |
| 29 | #include <hardware/thermal.h> |
| 30 | |
| 31 | #define MAX_LENGTH 50 |
| 32 | |
| 33 | #define CPU_USAGE_FILE "/proc/stat" |
| 34 | #define CPU_ONLINE_FILE_FORMAT "/sys/devices/system/cpu/cpu%d/online" |
| 35 | #define CPU_PRESENT_FILE "/sys/devices/system/cpu/present" |
| 36 | |
| 37 | const char * __attribute__ ((weak)) get_cpu_label(unsigned int cpu_num) { |
Rohit Bandi | e4e88d5 | 2017-09-18 12:48:39 -0700 | [diff] [blame] | 38 | ALOGD("Entering %s",__func__); |
Sathish Ambley | 635292e | 2017-07-17 20:37:08 -0700 | [diff] [blame] | 39 | static const char * cpu_label = "cpu"; |
| 40 | return cpu_label; |
| 41 | } |
| 42 | |
| 43 | size_t __attribute__ ((weak)) get_num_cpus() { |
Rohit Bandi | e4e88d5 | 2017-09-18 12:48:39 -0700 | [diff] [blame] | 44 | ALOGD("Entering %s",__func__); |
Sathish Ambley | 635292e | 2017-07-17 20:37:08 -0700 | [diff] [blame] | 45 | FILE *file; |
| 46 | char *line = NULL; |
| 47 | size_t len = 0; |
| 48 | static size_t cpus = 0; |
| 49 | ssize_t read; |
| 50 | |
| 51 | if(cpus) return cpus; |
| 52 | |
| 53 | file = fopen(CPU_PRESENT_FILE, "r"); |
| 54 | if (file == NULL) { |
| 55 | ALOGE("%s: failed to open: %s", __func__, strerror(errno)); |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | if ((read = getline(&line, &len, file)) != -1) { |
| 60 | if (strnlen(line, read) < 3 || strncmp(line, "0-", 2) != 0 || !isdigit(line[2])) |
| 61 | ALOGE("%s: Incorrect cpu present file format", __func__); |
| 62 | else |
| 63 | cpus = atoi(&line[2]) + 1; |
| 64 | |
| 65 | free(line); |
| 66 | } |
| 67 | else |
| 68 | ALOGE("%s: failed to read cpu present file: %s", __func__, strerror(errno)); |
| 69 | |
| 70 | fclose(file); |
| 71 | return cpus; |
| 72 | } |
| 73 | |
| 74 | ssize_t __attribute__ ((weak)) get_temperatures(thermal_module_t *module, temperature_t *list, size_t size) { |
Rohit Bandi | e4e88d5 | 2017-09-18 12:48:39 -0700 | [diff] [blame] | 75 | ALOGD("Entering %s",__func__); |
Sathish Ambley | 635292e | 2017-07-17 20:37:08 -0700 | [diff] [blame] | 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static ssize_t get_cpu_usages(thermal_module_t *module, cpu_usage_t *list) { |
Rohit Bandi | e4e88d5 | 2017-09-18 12:48:39 -0700 | [diff] [blame] | 80 | ALOGD("Entering %s",__func__); |
Sathish Ambley | 635292e | 2017-07-17 20:37:08 -0700 | [diff] [blame] | 81 | int vals, cpu_num, online; |
| 82 | ssize_t read; |
| 83 | uint64_t user, nice, system, idle, active, total; |
| 84 | char *line = NULL; |
| 85 | size_t len = 0; |
| 86 | size_t size = 0; |
| 87 | size_t cpus = 0; |
| 88 | char file_name[MAX_LENGTH]; |
| 89 | FILE *file; |
| 90 | FILE *cpu_file; |
| 91 | |
| 92 | cpus = get_num_cpus(); |
| 93 | if (!cpus) |
| 94 | return errno ? -errno : -EIO; |
| 95 | |
| 96 | if (list == NULL) |
| 97 | return cpus; |
| 98 | |
| 99 | file = fopen(CPU_USAGE_FILE, "r"); |
| 100 | if (file == NULL) { |
| 101 | ALOGE("%s: failed to open: %s", __func__, strerror(errno)); |
| 102 | return -errno; |
| 103 | } |
| 104 | |
| 105 | while ((read = getline(&line, &len, file)) != -1) { |
| 106 | if (strnlen(line, read) < 4 || strncmp(line, "cpu", 3) != 0 || !isdigit(line[3])) { |
| 107 | free(line); |
| 108 | line = NULL; |
| 109 | len = 0; |
| 110 | continue; |
| 111 | } |
| 112 | |
| 113 | vals = sscanf(line, "cpu%d %" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64, &cpu_num, &user, |
| 114 | &nice, &system, &idle); |
| 115 | |
| 116 | free(line); |
| 117 | line = NULL; |
| 118 | len = 0; |
| 119 | |
| 120 | if (vals != 5 || size == cpus) { |
| 121 | if (vals != 5) { |
| 122 | ALOGE("%s: failed to read CPU information from file: %s", __func__, |
| 123 | strerror(errno)); |
| 124 | } else { |
| 125 | ALOGE("/proc/stat file has incorrect format."); |
| 126 | } |
| 127 | fclose(file); |
| 128 | return errno ? -errno : -EIO; |
| 129 | } |
| 130 | |
| 131 | active = user + nice + system; |
| 132 | total = active + idle; |
| 133 | |
| 134 | // Read online CPU information. |
| 135 | snprintf(file_name, MAX_LENGTH, CPU_ONLINE_FILE_FORMAT, cpu_num); |
| 136 | cpu_file = fopen(file_name, "r"); |
| 137 | online = 0; |
| 138 | if (cpu_file == NULL) { |
| 139 | ALOGE("%s: failed to open file: %s (%s)", __func__, file_name, strerror(errno)); |
| 140 | fclose(file); |
| 141 | return -errno; |
| 142 | } |
| 143 | if (1 != fscanf(cpu_file, "%d", &online)) { |
| 144 | ALOGE("%s: failed to read CPU online information from file: %s (%s)", __func__, |
| 145 | file_name, strerror(errno)); |
| 146 | fclose(file); |
| 147 | fclose(cpu_file); |
| 148 | return errno ? -errno : -EIO; |
| 149 | } |
| 150 | fclose(cpu_file); |
| 151 | |
| 152 | list[size] = (cpu_usage_t) { |
| 153 | .name = get_cpu_label(size), |
| 154 | .active = active, |
| 155 | .total = total, |
| 156 | .is_online = online |
| 157 | }; |
| 158 | |
| 159 | size++; |
| 160 | } |
| 161 | fclose(file); |
| 162 | |
| 163 | if (size != cpus) { |
| 164 | ALOGE("/proc/stat file has incorrect format."); |
| 165 | return -EIO; |
| 166 | } |
| 167 | |
| 168 | return cpus; |
| 169 | } |
| 170 | |
| 171 | static struct hw_module_methods_t thermal_module_methods = { |
| 172 | .open = NULL, |
| 173 | }; |
| 174 | |
| 175 | thermal_module_t HAL_MODULE_INFO_SYM = { |
| 176 | .common = { |
| 177 | .tag = HARDWARE_MODULE_TAG, |
| 178 | .module_api_version = THERMAL_HARDWARE_MODULE_API_VERSION_0_1, |
| 179 | .hal_api_version = HARDWARE_HAL_API_VERSION, |
| 180 | .id = THERMAL_HARDWARE_MODULE_ID, |
| 181 | .name = "Thermal HAL", |
| 182 | .author = "The Android Open Source Project", |
| 183 | .methods = &thermal_module_methods, |
| 184 | }, |
| 185 | .getTemperatures = get_temperatures, |
| 186 | .getCpuUsages = get_cpu_usages, |
| 187 | }; |