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_atomic.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 volatile uint32_t global_env_cfg_status = 0;
  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         if (rte_atomic32_cmpset(&global_env_cfg_status, 0, 1) == 0) {
  33                 return 0;
  34         }
  35         if (env == PM_ENV_ACPI_CPUFREQ) {
  36                 rte_power_freqs = power_acpi_cpufreq_freqs;
  37                 rte_power_get_freq = power_acpi_cpufreq_get_freq;
  38                 rte_power_set_freq = power_acpi_cpufreq_set_freq;
  39                 rte_power_freq_up = power_acpi_cpufreq_freq_up;
  40                 rte_power_freq_down = power_acpi_cpufreq_freq_down;
  41                 rte_power_freq_min = power_acpi_cpufreq_freq_min;
  42                 rte_power_freq_max = power_acpi_cpufreq_freq_max;
  43                 rte_power_turbo_status = power_acpi_turbo_status;
  44                 rte_power_freq_enable_turbo = power_acpi_enable_turbo;
  45                 rte_power_freq_disable_turbo = power_acpi_disable_turbo;
  46                 rte_power_get_capabilities = power_acpi_get_capabilities;
  47         } else if (env == PM_ENV_KVM_VM) {
  48                 rte_power_freqs = power_kvm_vm_freqs;
  49                 rte_power_get_freq = power_kvm_vm_get_freq;
  50                 rte_power_set_freq = power_kvm_vm_set_freq;
  51                 rte_power_freq_up = power_kvm_vm_freq_up;
  52                 rte_power_freq_down = power_kvm_vm_freq_down;
  53                 rte_power_freq_min = power_kvm_vm_freq_min;
  54                 rte_power_freq_max = power_kvm_vm_freq_max;
  55                 rte_power_turbo_status = power_kvm_vm_turbo_status;
  56                 rte_power_freq_enable_turbo = power_kvm_vm_enable_turbo;
  57                 rte_power_freq_disable_turbo = power_kvm_vm_disable_turbo;
  58                 rte_power_get_capabilities = power_kvm_vm_get_capabilities;
  59         } else {
  60                 RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
  61                                 env);
  62                 rte_power_unset_env();
  63                 return -1;
  64         }
  65         global_default_env = env;
  66         return 0;
  67
  68 }
  69
  70 void
  71 rte_power_unset_env(void)
  72 {
  73         if (rte_atomic32_cmpset(&global_env_cfg_status, 1, 0) != 0)
  74                 global_default_env = PM_ENV_NOT_SET;
  75 }
  76
  77 enum power_management_env
  78 rte_power_get_env(void) {
  79         return global_default_env;
  80 }
  81
  82 int
  83 rte_power_init(unsigned int lcore_id)
  84 {
  85         int ret = -1;
  86
  87         if (global_default_env == PM_ENV_ACPI_CPUFREQ) {
  88                 return power_acpi_cpufreq_init(lcore_id);
  89         }
  90         if (global_default_env == PM_ENV_KVM_VM) {
  91                 return power_kvm_vm_init(lcore_id);
  92         }
  93         /* Auto detect Environment */
  94         RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power "
  95                         "management...\n");
  96         ret = power_acpi_cpufreq_init(lcore_id);
  97         if (ret == 0) {
  98                 rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
  99                 goto out;
 100         }
 101
 102         RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n");
 103         ret = power_kvm_vm_init(lcore_id);
 104         if (ret == 0) {
 105                 rte_power_set_env(PM_ENV_KVM_VM);
 106                 goto out;
 107         }
 108         RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore "
 109                         "%u\n", lcore_id);
 110 out:
 111         return ret;
 112 }
 113
 114 int
 115 rte_power_exit(unsigned int lcore_id)
 116 {
 117         if (global_default_env == PM_ENV_ACPI_CPUFREQ)
 118                 return power_acpi_cpufreq_exit(lcore_id);
 119         if (global_default_env == PM_ENV_KVM_VM)
 120                 return power_kvm_vm_exit(lcore_id);
 121
 122         RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit "
 123                                 "gracefully\n");
 124         return -1;
 125
 126 }