lib/librte_power/power_pstate_cpufreq.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 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 #include <errno.h>
  15 #include <inttypes.h>
  16
  17 #include <rte_memcpy.h>
  18 #include <rte_atomic.h>
  19
  20 #include "power_pstate_cpufreq.h"
  21 #include "power_common.h"
  22
  23
  24 #ifdef RTE_LIBRTE_POWER_DEBUG
  25 #define POWER_DEBUG_TRACE(fmt, args...) do { \
  26                 RTE_LOG(ERR, POWER, "%s: " fmt, __func__, ## args); \
  27 } while (0)
  28 #else
  29 #define POWER_DEBUG_TRACE(fmt, args...)
  30 #endif
  31
  32 #define FOPEN_OR_ERR_RET(f, retval) do { \
  33                 if ((f) == NULL) { \
  34                         RTE_LOG(ERR, POWER, "File not openned\n"); \
  35                         return retval; \
  36                 } \
  37 } while (0)
  38
  39 #define FOPS_OR_NULL_GOTO(ret, label) do { \
  40                 if ((ret) == NULL) { \
  41                         RTE_LOG(ERR, POWER, "fgets returns nothing\n"); \
  42                         goto label; \
  43                 } \
  44 } while (0)
  45
  46 #define FOPS_OR_ERR_GOTO(ret, label) do { \
  47                 if ((ret) < 0) { \
  48                         RTE_LOG(ERR, POWER, "File operations failed\n"); \
  49                         goto label; \
  50                 } \
  51 } while (0)
  52
  53
  54 #define POWER_CONVERT_TO_DECIMAL 10
  55 #define BUS_FREQ     100000
  56
  57 #define POWER_GOVERNOR_PERF "performance"
  58 #define POWER_SYSFILE_GOVERNOR  \
  59                 "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_governor"
  60 #define POWER_SYSFILE_MAX_FREQ \
  61                 "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_max_freq"
  62 #define POWER_SYSFILE_MIN_FREQ  \
  63                 "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_min_freq"
  64 #define POWER_SYSFILE_CUR_FREQ  \
  65                 "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_cur_freq"
  66 #define POWER_SYSFILE_BASE_MAX_FREQ \
  67                 "/sys/devices/system/cpu/cpu%u/cpufreq/cpuinfo_max_freq"
  68 #define POWER_SYSFILE_BASE_MIN_FREQ  \
  69                 "/sys/devices/system/cpu/cpu%u/cpufreq/cpuinfo_min_freq"
  70 #define POWER_MSR_PATH  "/dev/cpu/%u/msr"
  71
  72 /*
  73  * MSR related
  74  */
  75 #define PLATFORM_INFO     0x0CE
  76 #define NON_TURBO_MASK    0xFF00
  77 #define NON_TURBO_OFFSET  0x8
  78
  79
  80 enum power_state {
  81         POWER_IDLE = 0,
  82         POWER_ONGOING,
  83         POWER_USED,
  84         POWER_UNKNOWN
  85 };
  86
  87 struct pstate_power_info {
  88         unsigned int lcore_id;               /**< Logical core id */
  89         uint32_t freqs[RTE_MAX_LCORE_FREQS]; /**< Frequency array */
  90         uint32_t nb_freqs;                   /**< number of available freqs */
  91         FILE *f_cur_min;                     /**< FD of scaling_min */
  92         FILE *f_cur_max;                     /**< FD of scaling_max */
  93         char governor_ori[32];               /**< Original governor name */
  94         uint32_t curr_idx;                   /**< Freq index in freqs array */
  95         uint32_t non_turbo_max_ratio;        /**< Non Turbo Max ratio  */
  96         uint32_t sys_max_freq;               /**< system wide max freq  */
  97         volatile uint32_t state;             /**< Power in use state */
  98         uint16_t turbo_available;            /**< Turbo Boost available */
  99         uint16_t turbo_enable;               /**< Turbo Boost enable/disable */
 100 } __rte_cache_aligned;
 101
 102
 103 static struct pstate_power_info lcore_power_info[RTE_MAX_LCORE];
 104
 105 /**
 106  * It is to read the specific MSR.
 107  */
 108
 109 static int32_t
 110 power_rdmsr(int msr, uint64_t *val, unsigned int lcore_id)
 111 {
 112         int fd, ret;
 113         char fullpath[PATH_MAX];
 114
 115         snprintf(fullpath, sizeof(fullpath), POWER_MSR_PATH, lcore_id);
 116
 117         fd = open(fullpath, O_RDONLY);
 118
 119         if (fd < 0) {
 120                 RTE_LOG(ERR, POWER, "Error opening '%s': %s\n", fullpath,
 121                                  strerror(errno));
 122                 return fd;
 123         }
 124
 125         ret = pread(fd, val, sizeof(uint64_t), msr);
 126
 127         if (ret < 0) {
 128                 RTE_LOG(ERR, POWER, "Error reading '%s': %s\n", fullpath,
 129                                  strerror(errno));
 130                 goto out;
 131         }
 132
 133         POWER_DEBUG_TRACE("MSR Path %s, offset 0x%X for lcore %u\n",
 134                         fullpath, msr, lcore_id);
 135
 136         POWER_DEBUG_TRACE("Ret value %d, content is 0x%"PRIx64"\n", ret, *val);
 137
 138 out:    close(fd);
 139         return ret;
 140 }
 141
 142 /**
 143  * It is to fopen the sys file for the future setting the lcore frequency.
 144  */
 145 static int
 146 power_init_for_setting_freq(struct pstate_power_info *pi)
 147 {
 148         FILE *f_min, *f_max;
 149         char fullpath_min[PATH_MAX];
 150         char fullpath_max[PATH_MAX];
 151         uint64_t max_non_turbo = 0;
 152
 153         snprintf(fullpath_min, sizeof(fullpath_min), POWER_SYSFILE_MIN_FREQ,
 154                         pi->lcore_id);
 155
 156         f_min = fopen(fullpath_min, "rw+");
 157         FOPEN_OR_ERR_RET(f_min, -1);
 158
 159         snprintf(fullpath_max, sizeof(fullpath_max), POWER_SYSFILE_MAX_FREQ,
 160                         pi->lcore_id);
 161
 162         f_max = fopen(fullpath_max, "rw+");
 163         if (f_max == NULL)
 164                 fclose(f_min);
 165
 166         FOPEN_OR_ERR_RET(f_max, -1);
 167
 168         pi->f_cur_min = f_min;
 169         pi->f_cur_max = f_max;
 170
 171         /* Add MSR read to detect turbo status */
 172
 173         if (power_rdmsr(PLATFORM_INFO, &max_non_turbo, pi->lcore_id) < 0)
 174                 return -1;
 175
 176         max_non_turbo = (max_non_turbo&NON_TURBO_MASK)>>NON_TURBO_OFFSET;
 177
 178         POWER_DEBUG_TRACE("no turbo perf %"PRIu64"\n", max_non_turbo);
 179
 180         pi->non_turbo_max_ratio = max_non_turbo;
 181
 182         return 0;
 183 }
 184
 185 static int
 186 set_freq_internal(struct pstate_power_info *pi, uint32_t idx)
 187 {
 188         uint32_t target_freq = 0;
 189
 190         if (idx >= RTE_MAX_LCORE_FREQS || idx >= pi->nb_freqs) {
 191                 RTE_LOG(ERR, POWER, "Invalid frequency index %u, which "
 192                                 "should be less than %u\n", idx, pi->nb_freqs);
 193                 return -1;
 194         }
 195
 196         /* Check if it is the same as current */
 197         if (idx == pi->curr_idx)
 198                 return 0;
 199
 200         /* Because Intel Pstate Driver only allow user change min/max hint
 201          * User need change the min/max as same value.
 202          */
 203         if (fseek(pi->f_cur_min, 0, SEEK_SET) < 0) {
 204                 RTE_LOG(ERR, POWER, "Fail to set file position indicator to 0 "
 205                                 "for setting frequency for lcore %u\n",
 206                                 pi->lcore_id);
 207                 return -1;
 208         }
 209
 210         if (fseek(pi->f_cur_max, 0, SEEK_SET) < 0) {
 211                 RTE_LOG(ERR, POWER, "Fail to set file position indicator to 0 "
 212                                 "for setting frequency for lcore %u\n",
 213                                 pi->lcore_id);
 214                 return -1;
 215         }
 216
 217         /* Turbo is available and enabled, first freq bucket is sys max freq */
 218         if (pi->turbo_available && pi->turbo_enable && (idx == 0))
 219                 target_freq = pi->sys_max_freq;
 220         else
 221                 target_freq = pi->freqs[idx];
 222
 223         /* Decrease freq, the min freq should be updated first */
 224         if (idx  >  pi->curr_idx) {
 225
 226                 if (fprintf(pi->f_cur_min, "%u", target_freq) < 0) {
 227                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 228                                         "lcore %u\n", pi->lcore_id);
 229                         return -1;
 230                 }
 231
 232                 if (fprintf(pi->f_cur_max, "%u", target_freq) < 0) {
 233                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 234                                         "lcore %u\n", pi->lcore_id);
 235                         return -1;
 236                 }
 237
 238                 POWER_DEBUG_TRACE("Freqency '%u' to be set for lcore %u\n",
 239                                   target_freq, pi->lcore_id);
 240
 241                 fflush(pi->f_cur_min);
 242                 fflush(pi->f_cur_max);
 243
 244         }
 245
 246         /* Increase freq, the max freq should be updated first */
 247         if (idx  <  pi->curr_idx) {
 248
 249                 if (fprintf(pi->f_cur_max, "%u", target_freq) < 0) {
 250                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 251                                         "lcore %u\n", pi->lcore_id);
 252                         return -1;
 253                 }
 254
 255                 if (fprintf(pi->f_cur_min, "%u", target_freq) < 0) {
 256                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 257                                         "lcore %u\n", pi->lcore_id);
 258                         return -1;
 259                 }
 260
 261                 POWER_DEBUG_TRACE("Freqency '%u' to be set for lcore %u\n",
 262                                   target_freq, pi->lcore_id);
 263
 264                 fflush(pi->f_cur_max);
 265                 fflush(pi->f_cur_min);
 266         }
 267
 268         pi->curr_idx = idx;
 269
 270         return 1;
 271 }
 272
 273 /**
 274  * It is to check the current scaling governor by reading sys file, and then
 275  * set it into 'performance' if it is not by writing the sys file. The original
 276  * governor will be saved for rolling back.
 277  */
 278 static int
 279 power_set_governor_performance(struct pstate_power_info *pi)
 280 {
 281         FILE *f;
 282         int ret = -1;
 283         char buf[BUFSIZ];
 284         char fullpath[PATH_MAX];
 285         char *s;
 286         int val;
 287
 288         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR,
 289                         pi->lcore_id);
 290         f = fopen(fullpath, "rw+");
 291         FOPEN_OR_ERR_RET(f, ret);
 292
 293         s = fgets(buf, sizeof(buf), f);
 294         FOPS_OR_NULL_GOTO(s, out);
 295
 296         /* Check if current governor is performance */
 297         if (strncmp(buf, POWER_GOVERNOR_PERF,
 298                         sizeof(POWER_GOVERNOR_PERF)) == 0) {
 299                 ret = 0;
 300                 POWER_DEBUG_TRACE("Power management governor of lcore %u is "
 301                                 "already performance\n", pi->lcore_id);
 302                 goto out;
 303         }
 304         /* Save the original governor */
 305         snprintf(pi->governor_ori, sizeof(pi->governor_ori), "%s", buf);
 306
 307         /* Write 'performance' to the governor */
 308         val = fseek(f, 0, SEEK_SET);
 309         FOPS_OR_ERR_GOTO(val, out);
 310
 311         val = fputs(POWER_GOVERNOR_PERF, f);
 312         FOPS_OR_ERR_GOTO(val, out);
 313
 314         /* We need to flush to see if the fputs succeeds */
 315         val = fflush(f);
 316         FOPS_OR_ERR_GOTO(val, out);
 317
 318         ret = 0;
 319         RTE_LOG(INFO, POWER, "Power management governor of lcore %u has been "
 320                         "set to performance successfully\n", pi->lcore_id);
 321 out:
 322         fclose(f);
 323
 324         return ret;
 325 }
 326
 327 /**
 328  * It is to check the governor and then set the original governor back if
 329  * needed by writing the sys file.
 330  */
 331 static int
 332 power_set_governor_original(struct pstate_power_info *pi)
 333 {
 334         FILE *f;
 335         int ret = -1;
 336         char buf[BUFSIZ];
 337         char fullpath[PATH_MAX];
 338         char *s;
 339         int val;
 340
 341         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR,
 342                         pi->lcore_id);
 343         f = fopen(fullpath, "rw+");
 344         FOPEN_OR_ERR_RET(f, ret);
 345
 346         s = fgets(buf, sizeof(buf), f);
 347         FOPS_OR_NULL_GOTO(s, out);
 348
 349         /* Check if the governor to be set is the same as current */
 350         if (strncmp(buf, pi->governor_ori, sizeof(pi->governor_ori)) == 0) {
 351                 ret = 0;
 352                 POWER_DEBUG_TRACE("Power management governor of lcore %u "
 353                                 "has already been set to %s\n",
 354                                 pi->lcore_id, pi->governor_ori);
 355                 goto out;
 356         }
 357
 358         /* Write back the original governor */
 359         val = fseek(f, 0, SEEK_SET);
 360         FOPS_OR_ERR_GOTO(val, out);
 361
 362         val = fputs(pi->governor_ori, f);
 363         FOPS_OR_ERR_GOTO(val, out);
 364
 365         ret = 0;
 366         RTE_LOG(INFO, POWER, "Power management governor of lcore %u "
 367                         "has been set back to %s successfully\n",
 368                         pi->lcore_id, pi->governor_ori);
 369 out:
 370         fclose(f);
 371
 372         return ret;
 373 }
 374
 375 /**
 376  * It is to get the available frequencies of the specific lcore by reading the
 377  * sys file.
 378  */
 379 static int
 380 power_get_available_freqs(struct pstate_power_info *pi)
 381 {
 382         FILE *f_min, *f_max;
 383         int ret = -1;
 384         char *p_min, *p_max;
 385         char buf_min[BUFSIZ];
 386         char buf_max[BUFSIZ];
 387         char fullpath_min[PATH_MAX];
 388         char fullpath_max[PATH_MAX];
 389         char *s_min, *s_max;
 390         uint32_t sys_min_freq = 0, sys_max_freq = 0, base_max_freq = 0;
 391         uint32_t i, num_freqs = 0;
 392
 393         snprintf(fullpath_max, sizeof(fullpath_max),
 394                         POWER_SYSFILE_BASE_MAX_FREQ,
 395                         pi->lcore_id);
 396         snprintf(fullpath_min, sizeof(fullpath_min),
 397                         POWER_SYSFILE_BASE_MIN_FREQ,
 398                         pi->lcore_id);
 399
 400         f_min = fopen(fullpath_min, "r");
 401         FOPEN_OR_ERR_RET(f_min, ret);
 402
 403         f_max = fopen(fullpath_max, "r");
 404         if (f_max == NULL)
 405                 fclose(f_min);
 406
 407         FOPEN_OR_ERR_RET(f_max, ret);
 408
 409         s_min = fgets(buf_min, sizeof(buf_min), f_min);
 410         FOPS_OR_NULL_GOTO(s_min, out);
 411
 412         s_max = fgets(buf_max, sizeof(buf_max), f_max);
 413         FOPS_OR_NULL_GOTO(s_max, out);
 414
 415
 416         /* Strip the line break if there is */
 417         p_min = strchr(buf_min, '\n');
 418         if (p_min != NULL)
 419                 *p_min = 0;
 420
 421         p_max = strchr(buf_max, '\n');
 422         if (p_max != NULL)
 423                 *p_max = 0;
 424
 425         sys_min_freq = strtoul(buf_min, &p_min, POWER_CONVERT_TO_DECIMAL);
 426         sys_max_freq = strtoul(buf_max, &p_max, POWER_CONVERT_TO_DECIMAL);
 427
 428         if (sys_max_freq < sys_min_freq)
 429                 goto out;
 430
 431         pi->sys_max_freq = sys_max_freq;
 432
 433         base_max_freq = pi->non_turbo_max_ratio * BUS_FREQ;
 434
 435         POWER_DEBUG_TRACE("sys min %u, sys max %u, base_max %u\n",
 436                         sys_min_freq,
 437                         sys_max_freq,
 438                         base_max_freq);
 439
 440         if (base_max_freq < sys_max_freq)
 441                 pi->turbo_available = 1;
 442         else
 443                 pi->turbo_available = 0;
 444
 445         /* If turbo is available then there is one extra freq bucket
 446          * to store the sys max freq which value is base_max +1
 447          */
 448         num_freqs = (base_max_freq - sys_min_freq) / BUS_FREQ + 1 +
 449                 pi->turbo_available;
 450
 451         /* Generate the freq bucket array.
 452          * If turbo is available the freq bucket[0] value is base_max +1
 453          * the bucket[1] is base_max, bucket[2] is base_max - BUS_FREQ
 454          * and so on.
 455          * If turbo is not available bucket[0] is base_max and so on
 456          */
 457         for (i = 0, pi->nb_freqs = 0; i < num_freqs; i++) {
 458                 if ((i == 0) && pi->turbo_available)
 459                         pi->freqs[pi->nb_freqs++] = base_max_freq + 1;
 460                 else
 461                         pi->freqs[pi->nb_freqs++] =
 462                         base_max_freq - (i - pi->turbo_available) * BUS_FREQ;
 463         }
 464
 465         ret = 0;
 466
 467         POWER_DEBUG_TRACE("%d frequency(s) of lcore %u are available\n",
 468                         num_freqs, pi->lcore_id);
 469
 470 out:
 471         fclose(f_min);
 472         fclose(f_max);
 473
 474         return ret;
 475 }
 476
 477 int
 478 power_pstate_cpufreq_init(unsigned int lcore_id)
 479 {
 480         struct pstate_power_info *pi;
 481
 482         if (lcore_id >= RTE_MAX_LCORE) {
 483                 RTE_LOG(ERR, POWER, "Lcore id %u can not exceed %u\n",
 484                                 lcore_id, RTE_MAX_LCORE - 1U);
 485                 return -1;
 486         }
 487
 488         pi = &lcore_power_info[lcore_id];
 489         if (rte_atomic32_cmpset(&(pi->state), POWER_IDLE, POWER_ONGOING)
 490                         == 0) {
 491                 RTE_LOG(INFO, POWER, "Power management of lcore %u is "
 492                                 "in use\n", lcore_id);
 493                 return -1;
 494         }
 495
 496         pi->lcore_id = lcore_id;
 497         /* Check and set the governor */
 498         if (power_set_governor_performance(pi) < 0) {
 499                 RTE_LOG(ERR, POWER, "Cannot set governor of lcore %u to "
 500                                 "performance\n", lcore_id);
 501                 goto fail;
 502         }
 503         /* Init for setting lcore frequency */
 504         if (power_init_for_setting_freq(pi) < 0) {
 505                 RTE_LOG(ERR, POWER, "Cannot init for setting frequency for "
 506                                 "lcore %u\n", lcore_id);
 507                 goto fail;
 508         }
 509
 510         /* Get the available frequencies */
 511         if (power_get_available_freqs(pi) < 0) {
 512                 RTE_LOG(ERR, POWER, "Cannot get available frequencies of "
 513                                 "lcore %u\n", lcore_id);
 514                 goto fail;
 515         }
 516
 517
 518         /* Set freq to max by default */
 519         if (power_pstate_cpufreq_freq_max(lcore_id) < 0) {
 520                 RTE_LOG(ERR, POWER, "Cannot set frequency of lcore %u "
 521                                 "to max\n", lcore_id);
 522                 goto fail;
 523         }
 524
 525         RTE_LOG(INFO, POWER, "Initialized successfully for lcore %u "
 526                         "power management\n", lcore_id);
 527         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_USED);
 528
 529         return 0;
 530
 531 fail:
 532         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_UNKNOWN);
 533
 534         return -1;
 535 }
 536
 537 int
 538 power_pstate_cpufreq_exit(unsigned int lcore_id)
 539 {
 540         struct pstate_power_info *pi;
 541
 542         if (lcore_id >= RTE_MAX_LCORE) {
 543                 RTE_LOG(ERR, POWER, "Lcore id %u can not exceeds %u\n",
 544                                 lcore_id, RTE_MAX_LCORE - 1U);
 545                 return -1;
 546         }
 547         pi = &lcore_power_info[lcore_id];
 548
 549         if (rte_atomic32_cmpset(&(pi->state), POWER_USED, POWER_ONGOING)
 550                         == 0) {
 551                 RTE_LOG(INFO, POWER, "Power management of lcore %u is "
 552                                 "not used\n", lcore_id);
 553                 return -1;
 554         }
 555
 556         /* Close FD of setting freq */
 557         fclose(pi->f_cur_min);
 558         fclose(pi->f_cur_max);
 559         pi->f_cur_min = NULL;
 560         pi->f_cur_max = NULL;
 561
 562         /* Set the governor back to the original */
 563         if (power_set_governor_original(pi) < 0) {
 564                 RTE_LOG(ERR, POWER, "Cannot set the governor of %u back "
 565                                 "to the original\n", lcore_id);
 566                 goto fail;
 567         }
 568
 569         RTE_LOG(INFO, POWER, "Power management of lcore %u has exited from "
 570                         "'performance' mode and been set back to the "
 571                         "original\n", lcore_id);
 572         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_IDLE);
 573
 574         return 0;
 575
 576 fail:
 577         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_UNKNOWN);
 578
 579         return -1;
 580 }
 581
 582
 583 uint32_t
 584 power_pstate_cpufreq_freqs(unsigned int lcore_id, uint32_t *freqs, uint32_t num)
 585 {
 586         struct pstate_power_info *pi;
 587
 588         if (lcore_id >= RTE_MAX_LCORE) {
 589                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 590                 return 0;
 591         }
 592
 593         if (freqs == NULL) {
 594                 RTE_LOG(ERR, POWER, "NULL buffer supplied\n");
 595                 return 0;
 596         }
 597
 598         pi = &lcore_power_info[lcore_id];
 599         if (num < pi->nb_freqs) {
 600                 RTE_LOG(ERR, POWER, "Buffer size is not enough\n");
 601                 return 0;
 602         }
 603         rte_memcpy(freqs, pi->freqs, pi->nb_freqs * sizeof(uint32_t));
 604
 605         return pi->nb_freqs;
 606 }
 607
 608 uint32_t
 609 power_pstate_cpufreq_get_freq(unsigned int lcore_id)
 610 {
 611         if (lcore_id >= RTE_MAX_LCORE) {
 612                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 613                 return RTE_POWER_INVALID_FREQ_INDEX;
 614         }
 615
 616         return lcore_power_info[lcore_id].curr_idx;
 617 }
 618
 619
 620 int
 621 power_pstate_cpufreq_set_freq(unsigned int lcore_id, uint32_t index)
 622 {
 623         if (lcore_id >= RTE_MAX_LCORE) {
 624                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 625                 return -1;
 626         }
 627
 628         return set_freq_internal(&(lcore_power_info[lcore_id]), index);
 629 }
 630
 631 int
 632 power_pstate_cpufreq_freq_up(unsigned int lcore_id)
 633 {
 634         struct pstate_power_info *pi;
 635
 636         if (lcore_id >= RTE_MAX_LCORE) {
 637                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 638                 return -1;
 639         }
 640
 641         pi = &lcore_power_info[lcore_id];
 642         if (pi->curr_idx == 0)
 643                 return 0;
 644
 645         /* Frequencies in the array are from high to low. */
 646         return set_freq_internal(pi, pi->curr_idx - 1);
 647 }
 648
 649 int
 650 power_pstate_cpufreq_freq_down(unsigned int lcore_id)
 651 {
 652         struct pstate_power_info *pi;
 653
 654         if (lcore_id >= RTE_MAX_LCORE) {
 655                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 656                 return -1;
 657         }
 658
 659         pi = &lcore_power_info[lcore_id];
 660         if (pi->curr_idx + 1 == pi->nb_freqs)
 661                 return 0;
 662
 663         /* Frequencies in the array are from high to low. */
 664         return set_freq_internal(pi, pi->curr_idx + 1);
 665 }
 666
 667 int
 668 power_pstate_cpufreq_freq_max(unsigned int lcore_id)
 669 {
 670         if (lcore_id >= RTE_MAX_LCORE) {
 671                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 672                 return -1;
 673         }
 674
 675         /* Frequencies in the array are from high to low. */
 676         if (lcore_power_info[lcore_id].turbo_available) {
 677                 if (lcore_power_info[lcore_id].turbo_enable)
 678                         /* Set to Turbo */
 679                         return set_freq_internal(
 680                                         &lcore_power_info[lcore_id], 0);
 681                 else
 682                         /* Set to max non-turbo */
 683                         return set_freq_internal(
 684                                         &lcore_power_info[lcore_id], 1);
 685         } else
 686                 return set_freq_internal(&lcore_power_info[lcore_id], 0);
 687 }
 688
 689
 690 int
 691 power_pstate_cpufreq_freq_min(unsigned int lcore_id)
 692 {
 693         struct pstate_power_info *pi;
 694
 695         if (lcore_id >= RTE_MAX_LCORE) {
 696                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 697                 return -1;
 698         }
 699
 700         pi = &lcore_power_info[lcore_id];
 701
 702         /* Frequencies in the array are from high to low. */
 703         return set_freq_internal(pi, pi->nb_freqs - 1);
 704 }
 705
 706
 707 int
 708 power_pstate_turbo_status(unsigned int lcore_id)
 709 {
 710         struct pstate_power_info *pi;
 711
 712         if (lcore_id >= RTE_MAX_LCORE) {
 713                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 714                 return -1;
 715         }
 716
 717         pi = &lcore_power_info[lcore_id];
 718
 719         return pi->turbo_enable;
 720 }
 721
 722 int
 723 power_pstate_enable_turbo(unsigned int lcore_id)
 724 {
 725         struct pstate_power_info *pi;
 726
 727         if (lcore_id >= RTE_MAX_LCORE) {
 728                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 729                 return -1;
 730         }
 731
 732         pi = &lcore_power_info[lcore_id];
 733
 734         if (pi->turbo_available)
 735                 pi->turbo_enable = 1;
 736         else {
 737                 pi->turbo_enable = 0;
 738                 RTE_LOG(ERR, POWER,
 739                         "Failed to enable turbo on lcore %u\n",
 740                         lcore_id);
 741                         return -1;
 742         }
 743
 744         return 0;
 745 }
 746
 747
 748 int
 749 power_pstate_disable_turbo(unsigned int lcore_id)
 750 {
 751         struct pstate_power_info *pi;
 752
 753         if (lcore_id >= RTE_MAX_LCORE) {
 754                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 755                 return -1;
 756         }
 757
 758         pi = &lcore_power_info[lcore_id];
 759
 760         pi->turbo_enable = 0;
 761
 762
 763         return 0;
 764 }
 765
 766
 767 int power_pstate_get_capabilities(unsigned int lcore_id,
 768                 struct rte_power_core_capabilities *caps)
 769 {
 770         struct pstate_power_info *pi;
 771
 772         if (lcore_id >= RTE_MAX_LCORE) {
 773                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 774                 return -1;
 775         }
 776         if (caps == NULL) {
 777                 RTE_LOG(ERR, POWER, "Invalid argument\n");
 778                 return -1;
 779         }
 780
 781         pi = &lcore_power_info[lcore_id];
 782         caps->capabilities = 0;
 783         caps->turbo = !!(pi->turbo_available);
 784
 785         return 0;
 786 }