lib/librte_power/rte_power.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <rte_spinlock.h>
   6
   7 #include "rte_power.h"
   8 #include "power_acpi_cpufreq.h"
   9 #include "power_kvm_vm.h"
  10 #include "power_common.h"
  11
  12 enum power_management_env global_default_env = PM_ENV_NOT_SET;
  13
  14 static rte_spinlock_t global_env_cfg_lock = RTE_SPINLOCK_INITIALIZER;
  15
  16 /* function pointers */
  17 rte_power_freqs_t rte_power_freqs  = NULL;
  18 rte_power_get_freq_t rte_power_get_freq = NULL;
  19 rte_power_set_freq_t rte_power_set_freq = NULL;
  20 rte_power_freq_change_t rte_power_freq_up = NULL;
  21 rte_power_freq_change_t rte_power_freq_down = NULL;
  22 rte_power_freq_change_t rte_power_freq_max = NULL;
  23 rte_power_freq_change_t rte_power_freq_min = NULL;
  24 rte_power_freq_change_t rte_power_turbo_status;
  25 rte_power_freq_change_t rte_power_freq_enable_turbo;
  26 rte_power_freq_change_t rte_power_freq_disable_turbo;
  27 rte_power_get_capabilities_t rte_power_get_capabilities;
  28
  29 int
  30 rte_power_set_env(enum power_management_env env)
  31 {
  32         rte_spinlock_lock(&global_env_cfg_lock);
  33
  34         if (global_default_env != PM_ENV_NOT_SET) {
  35                 rte_spinlock_unlock(&global_env_cfg_lock);
  36                 return 0;
  37         }
  38
  39         int ret = 0;
  40
  41         if (env == PM_ENV_ACPI_CPUFREQ) {
  42                 rte_power_freqs = power_acpi_cpufreq_freqs;
  43                 rte_power_get_freq = power_acpi_cpufreq_get_freq;
  44                 rte_power_set_freq = power_acpi_cpufreq_set_freq;
  45                 rte_power_freq_up = power_acpi_cpufreq_freq_up;
  46                 rte_power_freq_down = power_acpi_cpufreq_freq_down;
  47                 rte_power_freq_min = power_acpi_cpufreq_freq_min;
  48                 rte_power_freq_max = power_acpi_cpufreq_freq_max;
  49                 rte_power_turbo_status = power_acpi_turbo_status;
  50                 rte_power_freq_enable_turbo = power_acpi_enable_turbo;
  51                 rte_power_freq_disable_turbo = power_acpi_disable_turbo;
  52                 rte_power_get_capabilities = power_acpi_get_capabilities;
  53         } else if (env == PM_ENV_KVM_VM) {
  54                 rte_power_freqs = power_kvm_vm_freqs;
  55                 rte_power_get_freq = power_kvm_vm_get_freq;
  56                 rte_power_set_freq = power_kvm_vm_set_freq;
  57                 rte_power_freq_up = power_kvm_vm_freq_up;
  58                 rte_power_freq_down = power_kvm_vm_freq_down;
  59                 rte_power_freq_min = power_kvm_vm_freq_min;
  60                 rte_power_freq_max = power_kvm_vm_freq_max;
  61                 rte_power_turbo_status = power_kvm_vm_turbo_status;
  62                 rte_power_freq_enable_turbo = power_kvm_vm_enable_turbo;
  63                 rte_power_freq_disable_turbo = power_kvm_vm_disable_turbo;
  64                 rte_power_get_capabilities = power_kvm_vm_get_capabilities;
  65         } else {
  66                 RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
  67                                 env);
  68                 ret = -1;
  69         }
  70
  71         if (ret == 0)
  72                 global_default_env = env;
  73         else
  74                 global_default_env = PM_ENV_NOT_SET;
  75
  76         rte_spinlock_unlock(&global_env_cfg_lock);
  77         return ret;
  78
  79 }
  80
  81 void
  82 rte_power_unset_env(void)
  83 {
  84         rte_spinlock_lock(&global_env_cfg_lock);
  85         global_default_env = PM_ENV_NOT_SET;
  86         rte_spinlock_unlock(&global_env_cfg_lock);
  87 }
  88
  89 enum power_management_env
  90 rte_power_get_env(void) {
  91         return global_default_env;
  92 }
  93
  94 int
  95 rte_power_init(unsigned int lcore_id)
  96 {
  97         int ret = -1;
  98
  99         if (global_default_env == PM_ENV_ACPI_CPUFREQ) {
 100                 return power_acpi_cpufreq_init(lcore_id);
 101         }
 102         if (global_default_env == PM_ENV_KVM_VM) {
 103                 return power_kvm_vm_init(lcore_id);
 104         }
 105         /* Auto detect Environment */
 106         RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power "
 107                         "management...\n");
 108         ret = power_acpi_cpufreq_init(lcore_id);
 109         if (ret == 0) {
 110                 rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
 111                 goto out;
 112         }
 113
 114         RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n");
 115         ret = power_kvm_vm_init(lcore_id);
 116         if (ret == 0) {
 117                 rte_power_set_env(PM_ENV_KVM_VM);
 118                 goto out;
 119         }
 120         RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore "
 121                         "%u\n", lcore_id);
 122 out:
 123         return ret;
 124 }
 125
 126 int
 127 rte_power_exit(unsigned int lcore_id)
 128 {
 129         if (global_default_env == PM_ENV_ACPI_CPUFREQ)
 130                 return power_acpi_cpufreq_exit(lcore_id);
 131         if (global_default_env == PM_ENV_KVM_VM)
 132                 return power_kvm_vm_exit(lcore_id);
 133
 134         RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit "
 135                                 "gracefully\n");
 136         return -1;
 137
 138 }