1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 #include <stdio.h> 6 #include <stdlib.h> 7 #include <stdint.h> 8 #include <inttypes.h> 9 #include <fcntl.h> 10 #include <unistd.h> 11 #include <dirent.h> 12 #include <errno.h> 13 14 #include <sys/sysinfo.h> 15 #include <sys/types.h> 16 17 #include <rte_log.h> 18 #include <rte_power.h> 19 #include <rte_spinlock.h> 20 21 #include "channel_manager.h" 22 #include "power_manager.h" 23 #include "oob_monitor.h" 24 25 #define POWER_SCALE_CORE(DIRECTION, core_num , ret) do { \ 26 if (core_num >= ci.core_count) \ 27 return -1; \ 28 if (!(ci.cd[core_num].global_enabled_cpus)) \ 29 return -1; \ 30 rte_spinlock_lock(&global_core_freq_info[core_num].power_sl); \ 31 ret = rte_power_freq_##DIRECTION(core_num); \ 32 rte_spinlock_unlock(&global_core_freq_info[core_num].power_sl); \ 33 } while (0) 34 35 struct freq_info { 36 rte_spinlock_t power_sl; 37 uint32_t freqs[RTE_MAX_LCORE_FREQS]; 38 unsigned num_freqs; 39 } __rte_cache_aligned; 40 41 static struct freq_info global_core_freq_info[RTE_MAX_LCORE]; 42 43 struct core_info ci; 44 45 #define SYSFS_CPU_PATH "/sys/devices/system/cpu/cpu%u/topology/core_id" 46 47 struct core_info * 48 get_core_info(void) 49 { 50 return &ci; 51 } 52 53 int 54 core_info_init(void) 55 { 56 struct core_info *ci; 57 int i; 58 59 ci = get_core_info(); 60 61 ci->core_count = get_nprocs_conf(); 62 ci->cd = malloc(ci->core_count * sizeof(struct core_details)); 63 memset(ci->cd, 0, ci->core_count * sizeof(struct core_details)); 64 if (!ci->cd) { 65 RTE_LOG(ERR, POWER_MANAGER, "Failed to allocate memory for core info."); 66 return -1; 67 } 68 for (i = 0; i < ci->core_count; i++) { 69 ci->cd[i].global_enabled_cpus = 1; 70 ci->cd[i].branch_ratio_threshold = BRANCH_RATIO_THRESHOLD; 71 } 72 printf("%d cores in system\n", ci->core_count); 73 return 0; 74 } 75 76 int 77 power_manager_init(void) 78 { 79 unsigned int i, num_cpus = 0, num_freqs = 0; 80 int ret = 0; 81 struct core_info *ci; 82 unsigned int max_core_num; 83 84 rte_power_set_env(PM_ENV_NOT_SET); 85 86 ci = get_core_info(); 87 if (!ci) { 88 RTE_LOG(ERR, POWER_MANAGER, 89 "Failed to get core info!\n"); 90 return -1; 91 } 92 93 if (ci->core_count > RTE_MAX_LCORE) 94 max_core_num = RTE_MAX_LCORE; 95 else 96 max_core_num = ci->core_count; 97 98 for (i = 0; i < max_core_num; i++) { 99 if (ci->cd[i].global_enabled_cpus) { 100 if (rte_power_init(i) < 0) 101 RTE_LOG(ERR, POWER_MANAGER, 102 "Unable to initialize power manager " 103 "for core %u\n", i); 104 num_cpus++; 105 num_freqs = rte_power_freqs(i, 106 global_core_freq_info[i].freqs, 107 RTE_MAX_LCORE_FREQS); 108 if (num_freqs == 0) { 109 RTE_LOG(ERR, POWER_MANAGER, 110 "Unable to get frequency list for core %u\n", 111 i); 112 ci->cd[i].oob_enabled = 0; 113 ret = -1; 114 } 115 global_core_freq_info[i].num_freqs = num_freqs; 116 117 rte_spinlock_init(&global_core_freq_info[i].power_sl); 118 } 119 if (ci->cd[i].oob_enabled) 120 add_core_to_monitor(i); 121 } 122 RTE_LOG(INFO, POWER_MANAGER, "Managing %u cores out of %u available host cores\n", 123 num_cpus, ci->core_count); 124 return ret; 125 126 } 127 128 uint32_t 129 power_manager_get_current_frequency(unsigned core_num) 130 { 131 uint32_t freq, index; 132 133 if (core_num >= RTE_MAX_LCORE) { 134 RTE_LOG(ERR, POWER_MANAGER, "Core(%u) is out of range 0...%d\n", 135 core_num, RTE_MAX_LCORE-1); 136 return -1; 137 } 138 if (!(ci.cd[core_num].global_enabled_cpus)) 139 return 0; 140 141 rte_spinlock_lock(&global_core_freq_info[core_num].power_sl); 142 index = rte_power_get_freq(core_num); 143 rte_spinlock_unlock(&global_core_freq_info[core_num].power_sl); 144 if (index >= RTE_MAX_LCORE_FREQS) 145 freq = 0; 146 else 147 freq = global_core_freq_info[core_num].freqs[index]; 148 149 return freq; 150 } 151 152 int 153 power_manager_exit(void) 154 { 155 unsigned int i; 156 int ret = 0; 157 struct core_info *ci; 158 unsigned int max_core_num; 159 160 ci = get_core_info(); 161 if (!ci) { 162 RTE_LOG(ERR, POWER_MANAGER, 163 "Failed to get core info!\n"); 164 return -1; 165 } 166 167 if (ci->core_count > RTE_MAX_LCORE) 168 max_core_num = RTE_MAX_LCORE; 169 else 170 max_core_num = ci->core_count; 171 172 for (i = 0; i < max_core_num; i++) { 173 if (ci->cd[i].global_enabled_cpus) { 174 if (rte_power_exit(i) < 0) { 175 RTE_LOG(ERR, POWER_MANAGER, "Unable to shutdown power manager " 176 "for core %u\n", i); 177 ret = -1; 178 } 179 ci->cd[i].global_enabled_cpus = 0; 180 } 181 remove_core_from_monitor(i); 182 } 183 return ret; 184 } 185 186 int 187 power_manager_scale_core_up(unsigned core_num) 188 { 189 int ret = 0; 190 191 POWER_SCALE_CORE(up, core_num, ret); 192 return ret; 193 } 194 195 int 196 power_manager_scale_core_down(unsigned core_num) 197 { 198 int ret = 0; 199 200 POWER_SCALE_CORE(down, core_num, ret); 201 return ret; 202 } 203 204 int 205 power_manager_scale_core_min(unsigned core_num) 206 { 207 int ret = 0; 208 209 POWER_SCALE_CORE(min, core_num, ret); 210 return ret; 211 } 212 213 int 214 power_manager_scale_core_max(unsigned core_num) 215 { 216 int ret = 0; 217 218 POWER_SCALE_CORE(max, core_num, ret); 219 return ret; 220 } 221 222 int 223 power_manager_enable_turbo_core(unsigned int core_num) 224 { 225 int ret = 0; 226 227 POWER_SCALE_CORE(enable_turbo, core_num, ret); 228 return ret; 229 } 230 231 int 232 power_manager_disable_turbo_core(unsigned int core_num) 233 { 234 int ret = 0; 235 236 POWER_SCALE_CORE(disable_turbo, core_num, ret); 237 return ret; 238 } 239 240 int 241 power_manager_scale_core_med(unsigned int core_num) 242 { 243 int ret = 0; 244 struct core_info *ci; 245 246 ci = get_core_info(); 247 if (core_num >= RTE_MAX_LCORE) 248 return -1; 249 if (!(ci->cd[core_num].global_enabled_cpus)) 250 return -1; 251 rte_spinlock_lock(&global_core_freq_info[core_num].power_sl); 252 ret = rte_power_set_freq(core_num, 253 global_core_freq_info[core_num].num_freqs / 2); 254 rte_spinlock_unlock(&global_core_freq_info[core_num].power_sl); 255 return ret; 256 } 257