ceph/src/spdk/dpdk/lib/librte_power/rte_power.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef _RTE_POWER_H
   6 #define _RTE_POWER_H
   7
   8 /**
   9  * @file
  10  * RTE Power Management
  11  */
  12
  13 #include <rte_common.h>
  14 #include <rte_byteorder.h>
  15 #include <rte_log.h>
  16 #include <rte_string_fns.h>
  17
  18 #ifdef __cplusplus
  19 extern "C" {
  20 #endif
  21
  22 /* Power Management Environment State */
  23 enum power_management_env {PM_ENV_NOT_SET, PM_ENV_ACPI_CPUFREQ, PM_ENV_KVM_VM,
  24                 PM_ENV_PSTATE_CPUFREQ};
  25
  26 /**
  27  * Set the default power management implementation. If this is not called prior
  28  * to rte_power_init(), then auto-detect of the environment will take place.
  29  * It is thread safe. New env can be set only in uninitialized state
  30  * (thus rte_power_unset_env must be called if different env was already set).
  31  *
  32  * @param env
  33  *  env. The environment in which to initialise Power Management for.
  34  *
  35  * @return
  36  *  - 0 on success.
  37  *  - Negative on error.
  38  */
  39 int rte_power_set_env(enum power_management_env env);
  40
  41 /**
  42  * Unset the global environment configuration.
  43  * This can only be called after all threads have completed.
  44  */
  45 void rte_power_unset_env(void);
  46
  47 /**
  48  * Get the default power management implementation.
  49  *
  50  * @return
  51  *  power_management_env The configured environment.
  52  */
  53 enum power_management_env rte_power_get_env(void);
  54
  55 /**
  56  * Initialize power management for a specific lcore. If rte_power_set_env() has
  57  * not been called then an auto-detect of the environment will start and
  58  * initialise the corresponding resources.
  59  *
  60  * @param lcore_id
  61  *  lcore id.
  62  *
  63  * @return
  64  *  - 0 on success.
  65  *  - Negative on error.
  66  */
  67 int rte_power_init(unsigned int lcore_id);
  68
  69 /**
  70  * Exit power management on a specific lcore. This will call the environment
  71  * dependent exit function.
  72  *
  73  * @param lcore_id
  74  *  lcore id.
  75  *
  76  * @return
  77  *  - 0 on success.
  78  *  - Negative on error.
  79  */
  80 int rte_power_exit(unsigned int lcore_id);
  81
  82 /**
  83  * Get the available frequencies of a specific lcore.
  84  * Function pointer definition. Review each environments
  85  * specific documentation for usage.
  86  *
  87  * @param lcore_id
  88  *  lcore id.
  89  * @param freqs
  90  *  The buffer array to save the frequencies.
  91  * @param num
  92  *  The number of frequencies to get.
  93  *
  94  * @return
  95  *  The number of available frequencies.
  96  */
  97 typedef uint32_t (*rte_power_freqs_t)(unsigned int lcore_id, uint32_t *freqs,
  98                 uint32_t num);
  99
 100 extern rte_power_freqs_t rte_power_freqs;
 101
 102 /**
 103  * Return the current index of available frequencies of a specific lcore.
 104  * Function pointer definition. Review each environments
 105  * specific documentation for usage.
 106  *
 107  * @param lcore_id
 108  *  lcore id.
 109  *
 110  * @return
 111  *  The current index of available frequencies.
 112  */
 113 typedef uint32_t (*rte_power_get_freq_t)(unsigned int lcore_id);
 114
 115 extern rte_power_get_freq_t rte_power_get_freq;
 116
 117 /**
 118  * Set the new frequency for a specific lcore by indicating the index of
 119  * available frequencies.
 120  * Function pointer definition. Review each environments
 121  * specific documentation for usage.
 122  *
 123  * @param lcore_id
 124  *  lcore id.
 125  * @param index
 126  *  The index of available frequencies.
 127  *
 128  * @return
 129  *  - 1 on success with frequency changed.
 130  *  - 0 on success without frequency changed.
 131  *  - Negative on error.
 132  */
 133 typedef int (*rte_power_set_freq_t)(unsigned int lcore_id, uint32_t index);
 134
 135 extern rte_power_set_freq_t rte_power_set_freq;
 136
 137 /**
 138  * Function pointer definition for generic frequency change functions. Review
 139  * each environments specific documentation for usage.
 140  *
 141  * @param lcore_id
 142  *  lcore id.
 143  *
 144  * @return
 145  *  - 1 on success with frequency changed.
 146  *  - 0 on success without frequency changed.
 147  *  - Negative on error.
 148  */
 149 typedef int (*rte_power_freq_change_t)(unsigned int lcore_id);
 150
 151 /**
 152  * Scale up the frequency of a specific lcore according to the available
 153  * frequencies.
 154  * Review each environments specific documentation for usage.
 155  *
 156  * @param lcore_id
 157  *  lcore id.
 158  *
 159  * @return
 160  *  - 1 on success with frequency changed.
 161  *  - 0 on success without frequency changed.
 162  *  - Negative on error.
 163  */
 164 extern rte_power_freq_change_t rte_power_freq_up;
 165
 166 /**
 167  * Scale down the frequency of a specific lcore according to the available
 168  * frequencies.
 169  * Review each environments specific documentation for usage.
 170  *
 171  * @param lcore_id
 172  *  lcore id.
 173  *
 174  * @return
 175  *  - 1 on success with frequency changed.
 176  *  - 0 on success without frequency changed.
 177  *  - Negative on error.
 178  */
 179
 180 extern rte_power_freq_change_t rte_power_freq_down;
 181
 182 /**
 183  * Scale up the frequency of a specific lcore to the highest according to the
 184  * available frequencies.
 185  * Review each environments specific documentation for usage.
 186  *
 187  * @param lcore_id
 188  *  lcore id.
 189  *
 190  * @return
 191  *  - 1 on success with frequency changed.
 192  *  - 0 on success without frequency changed.
 193  *  - Negative on error.
 194  */
 195 extern rte_power_freq_change_t rte_power_freq_max;
 196
 197 /**
 198  * Scale down the frequency of a specific lcore to the lowest according to the
 199  * available frequencies.
 200  * Review each environments specific documentation for usage..
 201  *
 202  * @param lcore_id
 203  *  lcore id.
 204  *
 205  * @return
 206  *  - 1 on success with frequency changed.
 207  *  - 0 on success without frequency changed.
 208  *  - Negative on error.
 209  */
 210 extern rte_power_freq_change_t rte_power_freq_min;
 211
 212 /**
 213  * Query the Turbo Boost status of a specific lcore.
 214  * Review each environments specific documentation for usage..
 215  *
 216  * @param lcore_id
 217  *  lcore id.
 218  *
 219  * @return
 220  *  - 1 Turbo Boost is enabled for this lcore.
 221  *  - 0 Turbo Boost is disabled for this lcore.
 222  *  - Negative on error.
 223  */
 224 extern rte_power_freq_change_t rte_power_turbo_status;
 225
 226 /**
 227  * Enable Turbo Boost for this lcore.
 228  * Review each environments specific documentation for usage..
 229  *
 230  * @param lcore_id
 231  *  lcore id.
 232  *
 233  * @return
 234  *  - 0 on success.
 235  *  - Negative on error.
 236  */
 237 extern rte_power_freq_change_t rte_power_freq_enable_turbo;
 238
 239 /**
 240  * Disable Turbo Boost for this lcore.
 241  * Review each environments specific documentation for usage..
 242  *
 243  * @param lcore_id
 244  *  lcore id.
 245  *
 246  * @return
 247  *  - 0 on success.
 248  *  - Negative on error.
 249  */
 250 extern rte_power_freq_change_t rte_power_freq_disable_turbo;
 251
 252 /**
 253  * Power capabilities summary.
 254  */
 255 struct rte_power_core_capabilities {
 256         RTE_STD_C11
 257         union {
 258                 uint64_t capabilities;
 259                 RTE_STD_C11
 260                 struct {
 261                         uint64_t turbo:1;       /**< Turbo can be enabled. */
 262                         uint64_t priority:1;    /**< SST-BF high freq core */
 263                 };
 264         };
 265 };
 266
 267 /**
 268  * Returns power capabilities for a specific lcore.
 269  * Function pointer definition. Review each environments
 270  * specific documentation for usage.
 271  *
 272  * @param lcore_id
 273  *  lcore id.
 274  * @param caps
 275  *  pointer to rte_power_core_capabilities object.
 276  *
 277  * @return
 278  *  - 0 on success.
 279  *  - Negative on error.
 280  */
 281 typedef int (*rte_power_get_capabilities_t)(unsigned int lcore_id,
 282                 struct rte_power_core_capabilities *caps);
 283
 284 extern rte_power_get_capabilities_t rte_power_get_capabilities;
 285
 286 #ifdef __cplusplus
 287 }
 288 #endif
 289
 290 #endif