lib/librte_power/power_acpi_cpufreq.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdio.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <fcntl.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12 #include <signal.h>
  13 #include <limits.h>
  14
  15 #include <rte_memcpy.h>
  16 #include <rte_memory.h>
  17 #include <rte_string_fns.h>
  18
  19 #include "power_acpi_cpufreq.h"
  20 #include "power_common.h"
  21
  22 #ifdef RTE_LIBRTE_POWER_DEBUG
  23 #define POWER_DEBUG_TRACE(fmt, args...) do { \
  24                 RTE_LOG(ERR, POWER, "%s: " fmt, __func__, ## args); \
  25 } while (0)
  26 #else
  27 #define POWER_DEBUG_TRACE(fmt, args...)
  28 #endif
  29
  30 #define FOPEN_OR_ERR_RET(f, retval) do { \
  31                 if ((f) == NULL) { \
  32                         RTE_LOG(ERR, POWER, "File not opened\n"); \
  33                         return retval; \
  34                 } \
  35 } while (0)
  36
  37 #define FOPS_OR_NULL_GOTO(ret, label) do { \
  38                 if ((ret) == NULL) { \
  39                         RTE_LOG(ERR, POWER, "fgets returns nothing\n"); \
  40                         goto label; \
  41                 } \
  42 } while (0)
  43
  44 #define FOPS_OR_ERR_GOTO(ret, label) do { \
  45                 if ((ret) < 0) { \
  46                         RTE_LOG(ERR, POWER, "File operations failed\n"); \
  47                         goto label; \
  48                 } \
  49 } while (0)
  50
  51 #define STR_SIZE     1024
  52 #define POWER_CONVERT_TO_DECIMAL 10
  53
  54 #define POWER_GOVERNOR_USERSPACE "userspace"
  55 #define POWER_SYSFILE_GOVERNOR   \
  56                 "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_governor"
  57 #define POWER_SYSFILE_AVAIL_FREQ \
  58                 "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_available_frequencies"
  59 #define POWER_SYSFILE_SETSPEED   \
  60                 "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_setspeed"
  61 #define POWER_ACPI_DRIVER "acpi-cpufreq"
  62
  63 /*
  64  * MSR related
  65  */
  66 #define PLATFORM_INFO     0x0CE
  67 #define TURBO_RATIO_LIMIT 0x1AD
  68 #define IA32_PERF_CTL     0x199
  69 #define CORE_TURBO_DISABLE_BIT ((uint64_t)1<<32)
  70
  71 enum power_state {
  72         POWER_IDLE = 0,
  73         POWER_ONGOING,
  74         POWER_USED,
  75         POWER_UNKNOWN
  76 };
  77
  78 /**
  79  * Power info per lcore.
  80  */
  81 struct rte_power_info {
  82         unsigned int lcore_id;                   /**< Logical core id */
  83         uint32_t freqs[RTE_MAX_LCORE_FREQS]; /**< Frequency array */
  84         uint32_t nb_freqs;                   /**< number of available freqs */
  85         FILE *f;                             /**< FD of scaling_setspeed */
  86         char governor_ori[32];               /**< Original governor name */
  87         uint32_t curr_idx;                   /**< Freq index in freqs array */
  88         uint32_t state;                      /**< Power in use state */
  89         uint16_t turbo_available;            /**< Turbo Boost available */
  90         uint16_t turbo_enable;               /**< Turbo Boost enable/disable */
  91 } __rte_cache_aligned;
  92
  93 static struct rte_power_info lcore_power_info[RTE_MAX_LCORE];
  94
  95 /**
  96  * It is to set specific freq for specific logical core, according to the index
  97  * of supported frequencies.
  98  */
  99 static int
 100 set_freq_internal(struct rte_power_info *pi, uint32_t idx)
 101 {
 102         if (idx >= RTE_MAX_LCORE_FREQS || idx >= pi->nb_freqs) {
 103                 RTE_LOG(ERR, POWER, "Invalid frequency index %u, which "
 104                                 "should be less than %u\n", idx, pi->nb_freqs);
 105                 return -1;
 106         }
 107
 108         /* Check if it is the same as current */
 109         if (idx == pi->curr_idx)
 110                 return 0;
 111
 112         POWER_DEBUG_TRACE("Frequency[%u] %u to be set for lcore %u\n",
 113                         idx, pi->freqs[idx], pi->lcore_id);
 114         if (fseek(pi->f, 0, SEEK_SET) < 0) {
 115                 RTE_LOG(ERR, POWER, "Fail to set file position indicator to 0 "
 116                                 "for setting frequency for lcore %u\n", pi->lcore_id);
 117                 return -1;
 118         }
 119         if (fprintf(pi->f, "%u", pi->freqs[idx]) < 0) {
 120                 RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 121                                 "lcore %u\n", pi->lcore_id);
 122                 return -1;
 123         }
 124         fflush(pi->f);
 125         pi->curr_idx = idx;
 126
 127         return 1;
 128 }
 129
 130 /**
 131  * It is to check the current scaling governor by reading sys file, and then
 132  * set it into 'userspace' if it is not by writing the sys file. The original
 133  * governor will be saved for rolling back.
 134  */
 135 static int
 136 power_set_governor_userspace(struct rte_power_info *pi)
 137 {
 138         FILE *f;
 139         int ret = -1;
 140         char buf[BUFSIZ];
 141         char fullpath[PATH_MAX];
 142         char *s;
 143         int val;
 144
 145         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR,
 146                         pi->lcore_id);
 147         f = fopen(fullpath, "rw+");
 148         FOPEN_OR_ERR_RET(f, ret);
 149
 150         s = fgets(buf, sizeof(buf), f);
 151         FOPS_OR_NULL_GOTO(s, out);
 152         /* Strip off terminating '\n' */
 153         strtok(buf, "\n");
 154
 155         /* Check if current governor is userspace */
 156         if (strncmp(buf, POWER_GOVERNOR_USERSPACE,
 157                         sizeof(POWER_GOVERNOR_USERSPACE)) == 0) {
 158                 ret = 0;
 159                 POWER_DEBUG_TRACE("Power management governor of lcore %u is "
 160                                 "already userspace\n", pi->lcore_id);
 161                 goto out;
 162         }
 163         /* Save the original governor */
 164         strlcpy(pi->governor_ori, buf, sizeof(pi->governor_ori));
 165
 166         /* Write 'userspace' to the governor */
 167         val = fseek(f, 0, SEEK_SET);
 168         FOPS_OR_ERR_GOTO(val, out);
 169
 170         val = fputs(POWER_GOVERNOR_USERSPACE, f);
 171         FOPS_OR_ERR_GOTO(val, out);
 172
 173         /* We need to flush to see if the fputs succeeds */
 174         val = fflush(f);
 175         FOPS_OR_ERR_GOTO(val, out);
 176
 177         ret = 0;
 178         RTE_LOG(INFO, POWER, "Power management governor of lcore %u has been "
 179                         "set to user space successfully\n", pi->lcore_id);
 180 out:
 181         fclose(f);
 182
 183         return ret;
 184 }
 185
 186 /**
 187  * It is to get the available frequencies of the specific lcore by reading the
 188  * sys file.
 189  */
 190 static int
 191 power_get_available_freqs(struct rte_power_info *pi)
 192 {
 193         FILE *f;
 194         int ret = -1, i, count;
 195         char *p;
 196         char buf[BUFSIZ];
 197         char fullpath[PATH_MAX];
 198         char *freqs[RTE_MAX_LCORE_FREQS];
 199         char *s;
 200
 201         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_AVAIL_FREQ,
 202                         pi->lcore_id);
 203         f = fopen(fullpath, "r");
 204         FOPEN_OR_ERR_RET(f, ret);
 205
 206         s = fgets(buf, sizeof(buf), f);
 207         FOPS_OR_NULL_GOTO(s, out);
 208
 209         /* Strip the line break if there is */
 210         p = strchr(buf, '\n');
 211         if (p != NULL)
 212                 *p = 0;
 213
 214         /* Split string into at most RTE_MAX_LCORE_FREQS frequencies */
 215         count = rte_strsplit(buf, sizeof(buf), freqs,
 216                         RTE_MAX_LCORE_FREQS, ' ');
 217         if (count <= 0) {
 218                 RTE_LOG(ERR, POWER, "No available frequency in "
 219                                 ""POWER_SYSFILE_AVAIL_FREQ"\n", pi->lcore_id);
 220                 goto out;
 221         }
 222         if (count >= RTE_MAX_LCORE_FREQS) {
 223                 RTE_LOG(ERR, POWER, "Too many available frequencies : %d\n",
 224                                 count);
 225                 goto out;
 226         }
 227
 228         /* Store the available frequncies into power context */
 229         for (i = 0, pi->nb_freqs = 0; i < count; i++) {
 230                 POWER_DEBUG_TRACE("Lcore %u frequency[%d]: %s\n", pi->lcore_id,
 231                                 i, freqs[i]);
 232                 pi->freqs[pi->nb_freqs++] = strtoul(freqs[i], &p,
 233                                 POWER_CONVERT_TO_DECIMAL);
 234         }
 235
 236         if ((pi->freqs[0]-1000) == pi->freqs[1]) {
 237                 pi->turbo_available = 1;
 238                 pi->turbo_enable = 1;
 239                 POWER_DEBUG_TRACE("Lcore %u Can do Turbo Boost\n",
 240                                 pi->lcore_id);
 241         } else {
 242                 pi->turbo_available = 0;
 243                 pi->turbo_enable = 0;
 244                 POWER_DEBUG_TRACE("Turbo Boost not available on Lcore %u\n",
 245                                 pi->lcore_id);
 246         }
 247
 248         ret = 0;
 249         POWER_DEBUG_TRACE("%d frequency(s) of lcore %u are available\n",
 250                         count, pi->lcore_id);
 251 out:
 252         fclose(f);
 253
 254         return ret;
 255 }
 256
 257 /**
 258  * It is to fopen the sys file for the future setting the lcore frequency.
 259  */
 260 static int
 261 power_init_for_setting_freq(struct rte_power_info *pi)
 262 {
 263         FILE *f;
 264         char fullpath[PATH_MAX];
 265         char buf[BUFSIZ];
 266         uint32_t i, freq;
 267         char *s;
 268
 269         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_SETSPEED,
 270                         pi->lcore_id);
 271         f = fopen(fullpath, "rw+");
 272         FOPEN_OR_ERR_RET(f, -1);
 273
 274         s = fgets(buf, sizeof(buf), f);
 275         FOPS_OR_NULL_GOTO(s, out);
 276
 277         freq = strtoul(buf, NULL, POWER_CONVERT_TO_DECIMAL);
 278         for (i = 0; i < pi->nb_freqs; i++) {
 279                 if (freq == pi->freqs[i]) {
 280                         pi->curr_idx = i;
 281                         pi->f = f;
 282                         return 0;
 283                 }
 284         }
 285
 286 out:
 287         fclose(f);
 288
 289         return -1;
 290 }
 291
 292 int
 293 power_acpi_cpufreq_check_supported(void)
 294 {
 295         return cpufreq_check_scaling_driver(POWER_ACPI_DRIVER);
 296 }
 297
 298 int
 299 power_acpi_cpufreq_init(unsigned int lcore_id)
 300 {
 301         struct rte_power_info *pi;
 302         uint32_t exp_state;
 303
 304         if (lcore_id >= RTE_MAX_LCORE) {
 305                 RTE_LOG(ERR, POWER, "Lcore id %u can not exceeds %u\n",
 306                                 lcore_id, RTE_MAX_LCORE - 1U);
 307                 return -1;
 308         }
 309
 310         pi = &lcore_power_info[lcore_id];
 311         exp_state = POWER_IDLE;
 312         /* The power in use state works as a guard variable between
 313          * the CPU frequency control initialization and exit process.
 314          * The ACQUIRE memory ordering here pairs with the RELEASE
 315          * ordering below as lock to make sure the frequency operations
 316          * in the critical section are done under the correct state.
 317          */
 318         if (!__atomic_compare_exchange_n(&(pi->state), &exp_state,
 319                                         POWER_ONGOING, 0,
 320                                         __ATOMIC_ACQUIRE, __ATOMIC_RELAXED)) {
 321                 RTE_LOG(INFO, POWER, "Power management of lcore %u is "
 322                                 "in use\n", lcore_id);
 323                 return -1;
 324         }
 325
 326         pi->lcore_id = lcore_id;
 327         /* Check and set the governor */
 328         if (power_set_governor_userspace(pi) < 0) {
 329                 RTE_LOG(ERR, POWER, "Cannot set governor of lcore %u to "
 330                                 "userspace\n", lcore_id);
 331                 goto fail;
 332         }
 333
 334         /* Get the available frequencies */
 335         if (power_get_available_freqs(pi) < 0) {
 336                 RTE_LOG(ERR, POWER, "Cannot get available frequencies of "
 337                                 "lcore %u\n", lcore_id);
 338                 goto fail;
 339         }
 340
 341         /* Init for setting lcore frequency */
 342         if (power_init_for_setting_freq(pi) < 0) {
 343                 RTE_LOG(ERR, POWER, "Cannot init for setting frequency for "
 344                                 "lcore %u\n", lcore_id);
 345                 goto fail;
 346         }
 347
 348         /* Set freq to max by default */
 349         if (power_acpi_cpufreq_freq_max(lcore_id) < 0) {
 350                 RTE_LOG(ERR, POWER, "Cannot set frequency of lcore %u "
 351                                 "to max\n", lcore_id);
 352                 goto fail;
 353         }
 354
 355         RTE_LOG(INFO, POWER, "Initialized successfully for lcore %u "
 356                         "power management\n", lcore_id);
 357         exp_state = POWER_ONGOING;
 358         __atomic_compare_exchange_n(&(pi->state), &exp_state, POWER_USED,
 359                                     0, __ATOMIC_RELEASE, __ATOMIC_RELAXED);
 360
 361         return 0;
 362
 363 fail:
 364         exp_state = POWER_ONGOING;
 365         __atomic_compare_exchange_n(&(pi->state), &exp_state, POWER_UNKNOWN,
 366                                     0, __ATOMIC_RELEASE, __ATOMIC_RELAXED);
 367
 368         return -1;
 369 }
 370
 371 /**
 372  * It is to check the governor and then set the original governor back if
 373  * needed by writing the sys file.
 374  */
 375 static int
 376 power_set_governor_original(struct rte_power_info *pi)
 377 {
 378         FILE *f;
 379         int ret = -1;
 380         char buf[BUFSIZ];
 381         char fullpath[PATH_MAX];
 382         char *s;
 383         int val;
 384
 385         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR,
 386                         pi->lcore_id);
 387         f = fopen(fullpath, "rw+");
 388         FOPEN_OR_ERR_RET(f, ret);
 389
 390         s = fgets(buf, sizeof(buf), f);
 391         FOPS_OR_NULL_GOTO(s, out);
 392
 393         /* Check if the governor to be set is the same as current */
 394         if (strncmp(buf, pi->governor_ori, sizeof(pi->governor_ori)) == 0) {
 395                 ret = 0;
 396                 POWER_DEBUG_TRACE("Power management governor of lcore %u "
 397                                 "has already been set to %s\n",
 398                                 pi->lcore_id, pi->governor_ori);
 399                 goto out;
 400         }
 401
 402         /* Write back the original governor */
 403         val = fseek(f, 0, SEEK_SET);
 404         FOPS_OR_ERR_GOTO(val, out);
 405
 406         val = fputs(pi->governor_ori, f);
 407         FOPS_OR_ERR_GOTO(val, out);
 408
 409         ret = 0;
 410         RTE_LOG(INFO, POWER, "Power management governor of lcore %u "
 411                         "has been set back to %s successfully\n",
 412                         pi->lcore_id, pi->governor_ori);
 413 out:
 414         fclose(f);
 415
 416         return ret;
 417 }
 418
 419 int
 420 power_acpi_cpufreq_exit(unsigned int lcore_id)
 421 {
 422         struct rte_power_info *pi;
 423         uint32_t exp_state;
 424
 425         if (lcore_id >= RTE_MAX_LCORE) {
 426                 RTE_LOG(ERR, POWER, "Lcore id %u can not exceeds %u\n",
 427                                 lcore_id, RTE_MAX_LCORE - 1U);
 428                 return -1;
 429         }
 430         pi = &lcore_power_info[lcore_id];
 431         exp_state = POWER_USED;
 432         /* The power in use state works as a guard variable between
 433          * the CPU frequency control initialization and exit process.
 434          * The ACQUIRE memory ordering here pairs with the RELEASE
 435          * ordering below as lock to make sure the frequency operations
 436          * in the critical section are done under the correct state.
 437          */
 438         if (!__atomic_compare_exchange_n(&(pi->state), &exp_state,
 439                                         POWER_ONGOING, 0,
 440                                         __ATOMIC_ACQUIRE, __ATOMIC_RELAXED)) {
 441                 RTE_LOG(INFO, POWER, "Power management of lcore %u is "
 442                                 "not used\n", lcore_id);
 443                 return -1;
 444         }
 445
 446         /* Close FD of setting freq */
 447         fclose(pi->f);
 448         pi->f = NULL;
 449
 450         /* Set the governor back to the original */
 451         if (power_set_governor_original(pi) < 0) {
 452                 RTE_LOG(ERR, POWER, "Cannot set the governor of %u back "
 453                                 "to the original\n", lcore_id);
 454                 goto fail;
 455         }
 456
 457         RTE_LOG(INFO, POWER, "Power management of lcore %u has exited from "
 458                         "'userspace' mode and been set back to the "
 459                         "original\n", lcore_id);
 460         exp_state = POWER_ONGOING;
 461         __atomic_compare_exchange_n(&(pi->state), &exp_state, POWER_IDLE,
 462                                     0, __ATOMIC_RELEASE, __ATOMIC_RELAXED);
 463
 464         return 0;
 465
 466 fail:
 467         exp_state = POWER_ONGOING;
 468         __atomic_compare_exchange_n(&(pi->state), &exp_state, POWER_UNKNOWN,
 469                                     0, __ATOMIC_RELEASE, __ATOMIC_RELAXED);
 470
 471         return -1;
 472 }
 473
 474 uint32_t
 475 power_acpi_cpufreq_freqs(unsigned int lcore_id, uint32_t *freqs, uint32_t num)
 476 {
 477         struct rte_power_info *pi;
 478
 479         if (lcore_id >= RTE_MAX_LCORE) {
 480                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 481                 return 0;
 482         }
 483
 484         if (freqs == NULL) {
 485                 RTE_LOG(ERR, POWER, "NULL buffer supplied\n");
 486                 return 0;
 487         }
 488
 489         pi = &lcore_power_info[lcore_id];
 490         if (num < pi->nb_freqs) {
 491                 RTE_LOG(ERR, POWER, "Buffer size is not enough\n");
 492                 return 0;
 493         }
 494         rte_memcpy(freqs, pi->freqs, pi->nb_freqs * sizeof(uint32_t));
 495
 496         return pi->nb_freqs;
 497 }
 498
 499 uint32_t
 500 power_acpi_cpufreq_get_freq(unsigned int lcore_id)
 501 {
 502         if (lcore_id >= RTE_MAX_LCORE) {
 503                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 504                 return RTE_POWER_INVALID_FREQ_INDEX;
 505         }
 506
 507         return lcore_power_info[lcore_id].curr_idx;
 508 }
 509
 510 int
 511 power_acpi_cpufreq_set_freq(unsigned int lcore_id, uint32_t index)
 512 {
 513         if (lcore_id >= RTE_MAX_LCORE) {
 514                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 515                 return -1;
 516         }
 517
 518         return set_freq_internal(&(lcore_power_info[lcore_id]), index);
 519 }
 520
 521 int
 522 power_acpi_cpufreq_freq_down(unsigned int lcore_id)
 523 {
 524         struct rte_power_info *pi;
 525
 526         if (lcore_id >= RTE_MAX_LCORE) {
 527                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 528                 return -1;
 529         }
 530
 531         pi = &lcore_power_info[lcore_id];
 532         if (pi->curr_idx + 1 == pi->nb_freqs)
 533                 return 0;
 534
 535         /* Frequencies in the array are from high to low. */
 536         return set_freq_internal(pi, pi->curr_idx + 1);
 537 }
 538
 539 int
 540 power_acpi_cpufreq_freq_up(unsigned int lcore_id)
 541 {
 542         struct rte_power_info *pi;
 543
 544         if (lcore_id >= RTE_MAX_LCORE) {
 545                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 546                 return -1;
 547         }
 548
 549         pi = &lcore_power_info[lcore_id];
 550         if (pi->curr_idx == 0 ||
 551             (pi->curr_idx == 1 && pi->turbo_available && !pi->turbo_enable))
 552                 return 0;
 553
 554         /* Frequencies in the array are from high to low. */
 555         return set_freq_internal(pi, pi->curr_idx - 1);
 556 }
 557
 558 int
 559 power_acpi_cpufreq_freq_max(unsigned int lcore_id)
 560 {
 561         if (lcore_id >= RTE_MAX_LCORE) {
 562                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 563                 return -1;
 564         }
 565
 566         /* Frequencies in the array are from high to low. */
 567         if (lcore_power_info[lcore_id].turbo_available) {
 568                 if (lcore_power_info[lcore_id].turbo_enable)
 569                         /* Set to Turbo */
 570                         return set_freq_internal(
 571                                         &lcore_power_info[lcore_id], 0);
 572                 else
 573                         /* Set to max non-turbo */
 574                         return set_freq_internal(
 575                                         &lcore_power_info[lcore_id], 1);
 576         } else
 577                 return set_freq_internal(&lcore_power_info[lcore_id], 0);
 578 }
 579
 580 int
 581 power_acpi_cpufreq_freq_min(unsigned int lcore_id)
 582 {
 583         struct rte_power_info *pi;
 584
 585         if (lcore_id >= RTE_MAX_LCORE) {
 586                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 587                 return -1;
 588         }
 589
 590         pi = &lcore_power_info[lcore_id];
 591
 592         /* Frequencies in the array are from high to low. */
 593         return set_freq_internal(pi, pi->nb_freqs - 1);
 594 }
 595
 596
 597 int
 598 power_acpi_turbo_status(unsigned int lcore_id)
 599 {
 600         struct rte_power_info *pi;
 601
 602         if (lcore_id >= RTE_MAX_LCORE) {
 603                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 604                 return -1;
 605         }
 606
 607         pi = &lcore_power_info[lcore_id];
 608
 609         return pi->turbo_enable;
 610 }
 611
 612
 613 int
 614 power_acpi_enable_turbo(unsigned int lcore_id)
 615 {
 616         struct rte_power_info *pi;
 617
 618         if (lcore_id >= RTE_MAX_LCORE) {
 619                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 620                 return -1;
 621         }
 622
 623         pi = &lcore_power_info[lcore_id];
 624
 625         if (pi->turbo_available)
 626                 pi->turbo_enable = 1;
 627         else {
 628                 pi->turbo_enable = 0;
 629                 RTE_LOG(ERR, POWER,
 630                         "Failed to enable turbo on lcore %u\n",
 631                         lcore_id);
 632                         return -1;
 633         }
 634
 635         /* Max may have changed, so call to max function */
 636         if (power_acpi_cpufreq_freq_max(lcore_id) < 0) {
 637                 RTE_LOG(ERR, POWER,
 638                         "Failed to set frequency of lcore %u to max\n",
 639                         lcore_id);
 640                         return -1;
 641         }
 642
 643         return 0;
 644 }
 645
 646 int
 647 power_acpi_disable_turbo(unsigned int lcore_id)
 648 {
 649         struct rte_power_info *pi;
 650
 651         if (lcore_id >= RTE_MAX_LCORE) {
 652                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 653                 return -1;
 654         }
 655
 656         pi = &lcore_power_info[lcore_id];
 657
 658          pi->turbo_enable = 0;
 659
 660         if ((pi->turbo_available) && (pi->curr_idx <= 1)) {
 661                 /* Try to set freq to max by default coming out of turbo */
 662                 if (power_acpi_cpufreq_freq_max(lcore_id) < 0) {
 663                         RTE_LOG(ERR, POWER,
 664                                 "Failed to set frequency of lcore %u to max\n",
 665                                 lcore_id);
 666                         return -1;
 667                 }
 668         }
 669
 670         return 0;
 671 }
 672
 673 int power_acpi_get_capabilities(unsigned int lcore_id,
 674                 struct rte_power_core_capabilities *caps)
 675 {
 676         struct rte_power_info *pi;
 677
 678         if (lcore_id >= RTE_MAX_LCORE) {
 679                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 680                 return -1;
 681         }
 682         if (caps == NULL) {
 683                 RTE_LOG(ERR, POWER, "Invalid argument\n");
 684                 return -1;
 685         }
 686
 687         pi = &lcore_power_info[lcore_id];
 688         caps->capabilities = 0;
 689         caps->turbo = !!(pi->turbo_available);
 690
 691         return 0;
 692 }