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         FOPEN_OR_ERR_RET(f_max, -1);
 164
 165         pi->f_cur_min = f_min;
 166         pi->f_cur_max = f_max;
 167
 168         /* Add MSR read to detect turbo status */
 169
 170         if (power_rdmsr(PLATFORM_INFO, &max_non_turbo, pi->lcore_id) < 0)
 171                 return -1;
 172
 173         max_non_turbo = (max_non_turbo&NON_TURBO_MASK)>>NON_TURBO_OFFSET;
 174
 175         POWER_DEBUG_TRACE("no turbo perf %"PRIu64"\n", max_non_turbo);
 176
 177         pi->non_turbo_max_ratio = max_non_turbo;
 178
 179         return 0;
 180 }
 181
 182 static int
 183 set_freq_internal(struct pstate_power_info *pi, uint32_t idx)
 184 {
 185         uint32_t target_freq = 0;
 186
 187         if (idx >= RTE_MAX_LCORE_FREQS || idx >= pi->nb_freqs) {
 188                 RTE_LOG(ERR, POWER, "Invalid frequency index %u, which "
 189                                 "should be less than %u\n", idx, pi->nb_freqs);
 190                 return -1;
 191         }
 192
 193         /* Check if it is the same as current */
 194         if (idx == pi->curr_idx)
 195                 return 0;
 196
 197         /* Because Intel Pstate Driver only allow user change min/max hint
 198          * User need change the min/max as same value.
 199          */
 200         if (fseek(pi->f_cur_min, 0, SEEK_SET) < 0) {
 201                 RTE_LOG(ERR, POWER, "Fail to set file position indicator to 0 "
 202                                 "for setting frequency for lcore %u\n",
 203                                 pi->lcore_id);
 204                 return -1;
 205         }
 206
 207         if (fseek(pi->f_cur_max, 0, SEEK_SET) < 0) {
 208                 RTE_LOG(ERR, POWER, "Fail to set file position indicator to 0 "
 209                                 "for setting frequency for lcore %u\n",
 210                                 pi->lcore_id);
 211                 return -1;
 212         }
 213
 214         /* Turbo is available and enabled, first freq bucket is sys max freq */
 215         if (pi->turbo_available && pi->turbo_enable && (idx == 0))
 216                 target_freq = pi->sys_max_freq;
 217         else
 218                 target_freq = pi->freqs[idx];
 219
 220         /* Decrease freq, the min freq should be updated first */
 221         if (idx  >  pi->curr_idx) {
 222
 223                 if (fprintf(pi->f_cur_min, "%u", target_freq) < 0) {
 224                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 225                                         "lcore %u\n", pi->lcore_id);
 226                         return -1;
 227                 }
 228
 229                 if (fprintf(pi->f_cur_max, "%u", target_freq) < 0) {
 230                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 231                                         "lcore %u\n", pi->lcore_id);
 232                         return -1;
 233                 }
 234
 235                 POWER_DEBUG_TRACE("Freqency '%u' to be set for lcore %u\n",
 236                                   target_freq, pi->lcore_id);
 237
 238                 fflush(pi->f_cur_min);
 239                 fflush(pi->f_cur_max);
 240
 241         }
 242
 243         /* Increase freq, the max freq should be updated first */
 244         if (idx  <  pi->curr_idx) {
 245
 246                 if (fprintf(pi->f_cur_max, "%u", target_freq) < 0) {
 247                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 248                                         "lcore %u\n", pi->lcore_id);
 249                         return -1;
 250                 }
 251
 252                 if (fprintf(pi->f_cur_min, "%u", target_freq) < 0) {
 253                         RTE_LOG(ERR, POWER, "Fail to write new frequency for "
 254                                         "lcore %u\n", pi->lcore_id);
 255                         return -1;
 256                 }
 257
 258                 POWER_DEBUG_TRACE("Freqency '%u' to be set for lcore %u\n",
 259                                   target_freq, pi->lcore_id);
 260
 261                 fflush(pi->f_cur_max);
 262                 fflush(pi->f_cur_min);
 263         }
 264
 265         pi->curr_idx = idx;
 266
 267         return 1;
 268 }
 269
 270 /**
 271  * It is to check the current scaling governor by reading sys file, and then
 272  * set it into 'performance' if it is not by writing the sys file. The original
 273  * governor will be saved for rolling back.
 274  */
 275 static int
 276 power_set_governor_performance(struct pstate_power_info *pi)
 277 {
 278         FILE *f;
 279         int ret = -1;
 280         char buf[BUFSIZ];
 281         char fullpath[PATH_MAX];
 282         char *s;
 283         int val;
 284
 285         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR,
 286                         pi->lcore_id);
 287         f = fopen(fullpath, "rw+");
 288         FOPEN_OR_ERR_RET(f, ret);
 289
 290         s = fgets(buf, sizeof(buf), f);
 291         FOPS_OR_NULL_GOTO(s, out);
 292
 293         /* Check if current governor is performance */
 294         if (strncmp(buf, POWER_GOVERNOR_PERF,
 295                         sizeof(POWER_GOVERNOR_PERF)) == 0) {
 296                 ret = 0;
 297                 POWER_DEBUG_TRACE("Power management governor of lcore %u is "
 298                                 "already performance\n", pi->lcore_id);
 299                 goto out;
 300         }
 301         /* Save the original governor */
 302         snprintf(pi->governor_ori, sizeof(pi->governor_ori), "%s", buf);
 303
 304         /* Write 'performance' to the governor */
 305         val = fseek(f, 0, SEEK_SET);
 306         FOPS_OR_ERR_GOTO(val, out);
 307
 308         val = fputs(POWER_GOVERNOR_PERF, f);
 309         FOPS_OR_ERR_GOTO(val, out);
 310
 311         /* We need to flush to see if the fputs succeeds */
 312         val = fflush(f);
 313         FOPS_OR_ERR_GOTO(val, out);
 314
 315         ret = 0;
 316         RTE_LOG(INFO, POWER, "Power management governor of lcore %u has been "
 317                         "set to performance successfully\n", pi->lcore_id);
 318 out:
 319         fclose(f);
 320
 321         return ret;
 322 }
 323
 324 /**
 325  * It is to check the governor and then set the original governor back if
 326  * needed by writing the sys file.
 327  */
 328 static int
 329 power_set_governor_original(struct pstate_power_info *pi)
 330 {
 331         FILE *f;
 332         int ret = -1;
 333         char buf[BUFSIZ];
 334         char fullpath[PATH_MAX];
 335         char *s;
 336         int val;
 337
 338         snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR,
 339                         pi->lcore_id);
 340         f = fopen(fullpath, "rw+");
 341         FOPEN_OR_ERR_RET(f, ret);
 342
 343         s = fgets(buf, sizeof(buf), f);
 344         FOPS_OR_NULL_GOTO(s, out);
 345
 346         /* Check if the governor to be set is the same as current */
 347         if (strncmp(buf, pi->governor_ori, sizeof(pi->governor_ori)) == 0) {
 348                 ret = 0;
 349                 POWER_DEBUG_TRACE("Power management governor of lcore %u "
 350                                 "has already been set to %s\n",
 351                                 pi->lcore_id, pi->governor_ori);
 352                 goto out;
 353         }
 354
 355         /* Write back the original governor */
 356         val = fseek(f, 0, SEEK_SET);
 357         FOPS_OR_ERR_GOTO(val, out);
 358
 359         val = fputs(pi->governor_ori, f);
 360         FOPS_OR_ERR_GOTO(val, out);
 361
 362         ret = 0;
 363         RTE_LOG(INFO, POWER, "Power management governor of lcore %u "
 364                         "has been set back to %s successfully\n",
 365                         pi->lcore_id, pi->governor_ori);
 366 out:
 367         fclose(f);
 368
 369         return ret;
 370 }
 371
 372 /**
 373  * It is to get the available frequencies of the specific lcore by reading the
 374  * sys file.
 375  */
 376 static int
 377 power_get_available_freqs(struct pstate_power_info *pi)
 378 {
 379         FILE *f_min, *f_max;
 380         int ret = -1;
 381         char *p_min, *p_max;
 382         char buf_min[BUFSIZ];
 383         char buf_max[BUFSIZ];
 384         char fullpath_min[PATH_MAX];
 385         char fullpath_max[PATH_MAX];
 386         char *s_min, *s_max;
 387         uint32_t sys_min_freq = 0, sys_max_freq = 0, base_max_freq = 0;
 388         uint32_t i, num_freqs = 0;
 389
 390         snprintf(fullpath_max, sizeof(fullpath_max),
 391                         POWER_SYSFILE_BASE_MAX_FREQ,
 392                         pi->lcore_id);
 393         snprintf(fullpath_min, sizeof(fullpath_min),
 394                         POWER_SYSFILE_BASE_MIN_FREQ,
 395                         pi->lcore_id);
 396
 397         f_min = fopen(fullpath_min, "r");
 398         FOPEN_OR_ERR_RET(f_min, ret);
 399
 400         f_max = fopen(fullpath_max, "r");
 401         FOPEN_OR_ERR_RET(f_max, ret);
 402
 403         s_min = fgets(buf_min, sizeof(buf_min), f_min);
 404         FOPS_OR_NULL_GOTO(s_min, out);
 405
 406         s_max = fgets(buf_max, sizeof(buf_max), f_max);
 407         FOPS_OR_NULL_GOTO(s_max, out);
 408
 409
 410         /* Strip the line break if there is */
 411         p_min = strchr(buf_min, '\n');
 412         if (p_min != NULL)
 413                 *p_min = 0;
 414
 415         p_max = strchr(buf_max, '\n');
 416         if (p_max != NULL)
 417                 *p_max = 0;
 418
 419         sys_min_freq = strtoul(buf_min, &p_min, POWER_CONVERT_TO_DECIMAL);
 420         sys_max_freq = strtoul(buf_max, &p_max, POWER_CONVERT_TO_DECIMAL);
 421
 422         if (sys_max_freq < sys_min_freq)
 423                 goto out;
 424
 425         pi->sys_max_freq = sys_max_freq;
 426
 427         base_max_freq = pi->non_turbo_max_ratio * BUS_FREQ;
 428
 429         POWER_DEBUG_TRACE("sys min %u, sys max %u, base_max %u\n",
 430                         sys_min_freq,
 431                         sys_max_freq,
 432                         base_max_freq);
 433
 434         if (base_max_freq < sys_max_freq)
 435                 pi->turbo_available = 1;
 436         else
 437                 pi->turbo_available = 0;
 438
 439         /* If turbo is available then there is one extra freq bucket
 440          * to store the sys max freq which value is base_max +1
 441          */
 442         num_freqs = (base_max_freq - sys_min_freq) / BUS_FREQ + 1 +
 443                 pi->turbo_available;
 444
 445         /* Generate the freq bucket array.
 446          * If turbo is available the freq bucket[0] value is base_max +1
 447          * the bucket[1] is base_max, bucket[2] is base_max - BUS_FREQ
 448          * and so on.
 449          * If turbo is not available bucket[0] is base_max and so on
 450          */
 451         for (i = 0, pi->nb_freqs = 0; i < num_freqs; i++) {
 452                 if ((i == 0) && pi->turbo_available)
 453                         pi->freqs[pi->nb_freqs++] = base_max_freq + 1;
 454                 else
 455                         pi->freqs[pi->nb_freqs++] =
 456                         base_max_freq - (i - pi->turbo_available) * BUS_FREQ;
 457         }
 458
 459         ret = 0;
 460
 461         POWER_DEBUG_TRACE("%d frequency(s) of lcore %u are available\n",
 462                         num_freqs, pi->lcore_id);
 463
 464 out:
 465         fclose(f_min);
 466         fclose(f_max);
 467
 468         return ret;
 469 }
 470
 471 int
 472 power_pstate_cpufreq_init(unsigned int lcore_id)
 473 {
 474         struct pstate_power_info *pi;
 475
 476         if (lcore_id >= RTE_MAX_LCORE) {
 477                 RTE_LOG(ERR, POWER, "Lcore id %u can not exceed %u\n",
 478                                 lcore_id, RTE_MAX_LCORE - 1U);
 479                 return -1;
 480         }
 481
 482         pi = &lcore_power_info[lcore_id];
 483         if (rte_atomic32_cmpset(&(pi->state), POWER_IDLE, POWER_ONGOING)
 484                         == 0) {
 485                 RTE_LOG(INFO, POWER, "Power management of lcore %u is "
 486                                 "in use\n", lcore_id);
 487                 return -1;
 488         }
 489
 490         pi->lcore_id = lcore_id;
 491         /* Check and set the governor */
 492         if (power_set_governor_performance(pi) < 0) {
 493                 RTE_LOG(ERR, POWER, "Cannot set governor of lcore %u to "
 494                                 "performance\n", lcore_id);
 495                 goto fail;
 496         }
 497         /* Init for setting lcore frequency */
 498         if (power_init_for_setting_freq(pi) < 0) {
 499                 RTE_LOG(ERR, POWER, "Cannot init for setting frequency for "
 500                                 "lcore %u\n", lcore_id);
 501                 goto fail;
 502         }
 503
 504         /* Get the available frequencies */
 505         if (power_get_available_freqs(pi) < 0) {
 506                 RTE_LOG(ERR, POWER, "Cannot get available frequencies of "
 507                                 "lcore %u\n", lcore_id);
 508                 goto fail;
 509         }
 510
 511
 512         /* Set freq to max by default */
 513         if (power_pstate_cpufreq_freq_max(lcore_id) < 0) {
 514                 RTE_LOG(ERR, POWER, "Cannot set frequency of lcore %u "
 515                                 "to max\n", lcore_id);
 516                 goto fail;
 517         }
 518
 519         RTE_LOG(INFO, POWER, "Initialized successfully for lcore %u "
 520                         "power management\n", lcore_id);
 521         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_USED);
 522
 523         return 0;
 524
 525 fail:
 526         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_UNKNOWN);
 527
 528         return -1;
 529 }
 530
 531 int
 532 power_pstate_cpufreq_exit(unsigned int lcore_id)
 533 {
 534         struct pstate_power_info *pi;
 535
 536         if (lcore_id >= RTE_MAX_LCORE) {
 537                 RTE_LOG(ERR, POWER, "Lcore id %u can not exceeds %u\n",
 538                                 lcore_id, RTE_MAX_LCORE - 1U);
 539                 return -1;
 540         }
 541         pi = &lcore_power_info[lcore_id];
 542
 543         if (rte_atomic32_cmpset(&(pi->state), POWER_USED, POWER_ONGOING)
 544                         == 0) {
 545                 RTE_LOG(INFO, POWER, "Power management of lcore %u is "
 546                                 "not used\n", lcore_id);
 547                 return -1;
 548         }
 549
 550         /* Close FD of setting freq */
 551         fclose(pi->f_cur_min);
 552         fclose(pi->f_cur_max);
 553         pi->f_cur_min = NULL;
 554         pi->f_cur_max = NULL;
 555
 556         /* Set the governor back to the original */
 557         if (power_set_governor_original(pi) < 0) {
 558                 RTE_LOG(ERR, POWER, "Cannot set the governor of %u back "
 559                                 "to the original\n", lcore_id);
 560                 goto fail;
 561         }
 562
 563         RTE_LOG(INFO, POWER, "Power management of lcore %u has exited from "
 564                         "'performance' mode and been set back to the "
 565                         "original\n", lcore_id);
 566         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_IDLE);
 567
 568         return 0;
 569
 570 fail:
 571         rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_UNKNOWN);
 572
 573         return -1;
 574 }
 575
 576
 577 uint32_t
 578 power_pstate_cpufreq_freqs(unsigned int lcore_id, uint32_t *freqs, uint32_t num)
 579 {
 580         struct pstate_power_info *pi;
 581
 582         if (lcore_id >= RTE_MAX_LCORE) {
 583                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 584                 return -1;
 585         }
 586
 587         if (freqs == NULL) {
 588                 RTE_LOG(ERR, POWER, "NULL buffer supplied\n");
 589                 return 0;
 590         }
 591
 592         pi = &lcore_power_info[lcore_id];
 593         if (num < pi->nb_freqs) {
 594                 RTE_LOG(ERR, POWER, "Buffer size is not enough\n");
 595                 return 0;
 596         }
 597         rte_memcpy(freqs, pi->freqs, pi->nb_freqs * sizeof(uint32_t));
 598
 599         return pi->nb_freqs;
 600 }
 601
 602 uint32_t
 603 power_pstate_cpufreq_get_freq(unsigned int lcore_id)
 604 {
 605         if (lcore_id >= RTE_MAX_LCORE) {
 606                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 607                 return RTE_POWER_INVALID_FREQ_INDEX;
 608         }
 609
 610         return lcore_power_info[lcore_id].curr_idx;
 611 }
 612
 613
 614 int
 615 power_pstate_cpufreq_set_freq(unsigned int lcore_id, uint32_t index)
 616 {
 617         if (lcore_id >= RTE_MAX_LCORE) {
 618                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 619                 return -1;
 620         }
 621
 622         return set_freq_internal(&(lcore_power_info[lcore_id]), index);
 623 }
 624
 625 int
 626 power_pstate_cpufreq_freq_up(unsigned int lcore_id)
 627 {
 628         struct pstate_power_info *pi;
 629
 630         if (lcore_id >= RTE_MAX_LCORE) {
 631                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 632                 return -1;
 633         }
 634
 635         pi = &lcore_power_info[lcore_id];
 636         if (pi->curr_idx == 0)
 637                 return 0;
 638
 639         /* Frequencies in the array are from high to low. */
 640         return set_freq_internal(pi, pi->curr_idx - 1);
 641 }
 642
 643 int
 644 power_pstate_cpufreq_freq_down(unsigned int lcore_id)
 645 {
 646         struct pstate_power_info *pi;
 647
 648         if (lcore_id >= RTE_MAX_LCORE) {
 649                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 650                 return -1;
 651         }
 652
 653         pi = &lcore_power_info[lcore_id];
 654         if (pi->curr_idx + 1 == pi->nb_freqs)
 655                 return 0;
 656
 657         /* Frequencies in the array are from high to low. */
 658         return set_freq_internal(pi, pi->curr_idx + 1);
 659 }
 660
 661 int
 662 power_pstate_cpufreq_freq_max(unsigned int lcore_id)
 663 {
 664         if (lcore_id >= RTE_MAX_LCORE) {
 665                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 666                 return -1;
 667         }
 668
 669         /* Frequencies in the array are from high to low. */
 670         if (lcore_power_info[lcore_id].turbo_available) {
 671                 if (lcore_power_info[lcore_id].turbo_enable)
 672                         /* Set to Turbo */
 673                         return set_freq_internal(
 674                                         &lcore_power_info[lcore_id], 0);
 675                 else
 676                         /* Set to max non-turbo */
 677                         return set_freq_internal(
 678                                         &lcore_power_info[lcore_id], 1);
 679         } else
 680                 return set_freq_internal(&lcore_power_info[lcore_id], 0);
 681 }
 682
 683
 684 int
 685 power_pstate_cpufreq_freq_min(unsigned int lcore_id)
 686 {
 687         struct pstate_power_info *pi;
 688
 689         if (lcore_id >= RTE_MAX_LCORE) {
 690                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 691                 return -1;
 692         }
 693
 694         pi = &lcore_power_info[lcore_id];
 695
 696         /* Frequencies in the array are from high to low. */
 697         return set_freq_internal(pi, pi->nb_freqs - 1);
 698 }
 699
 700
 701 int
 702 power_pstate_turbo_status(unsigned int lcore_id)
 703 {
 704         struct pstate_power_info *pi;
 705
 706         if (lcore_id >= RTE_MAX_LCORE) {
 707                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 708                 return -1;
 709         }
 710
 711         pi = &lcore_power_info[lcore_id];
 712
 713         return pi->turbo_enable;
 714 }
 715
 716 int
 717 power_pstate_enable_turbo(unsigned int lcore_id)
 718 {
 719         struct pstate_power_info *pi;
 720
 721         if (lcore_id >= RTE_MAX_LCORE) {
 722                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 723                 return -1;
 724         }
 725
 726         pi = &lcore_power_info[lcore_id];
 727
 728         if (pi->turbo_available)
 729                 pi->turbo_enable = 1;
 730         else {
 731                 pi->turbo_enable = 0;
 732                 RTE_LOG(ERR, POWER,
 733                         "Failed to enable turbo on lcore %u\n",
 734                         lcore_id);
 735                         return -1;
 736         }
 737
 738         return 0;
 739 }
 740
 741
 742 int
 743 power_pstate_disable_turbo(unsigned int lcore_id)
 744 {
 745         struct pstate_power_info *pi;
 746
 747         if (lcore_id >= RTE_MAX_LCORE) {
 748                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 749                 return -1;
 750         }
 751
 752         pi = &lcore_power_info[lcore_id];
 753
 754         pi->turbo_enable = 0;
 755
 756
 757         return 0;
 758 }
 759
 760
 761 int power_pstate_get_capabilities(unsigned int lcore_id,
 762                 struct rte_power_core_capabilities *caps)
 763 {
 764         struct pstate_power_info *pi;
 765
 766         if (lcore_id >= RTE_MAX_LCORE) {
 767                 RTE_LOG(ERR, POWER, "Invalid lcore ID\n");
 768                 return -1;
 769         }
 770         if (caps == NULL) {
 771                 RTE_LOG(ERR, POWER, "Invalid argument\n");
 772                 return -1;
 773         }
 774
 775         pi = &lcore_power_info[lcore_id];
 776         caps->capabilities = 0;
 777         caps->turbo = !!(pi->turbo_available);
 778
 779         return 0;
 780 }