ceph/src/seastar/dpdk/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_pstate_cpufreq.h"
  11 #include "power_common.h"
  12
  13 enum power_management_env global_default_env = PM_ENV_NOT_SET;
  14
  15 static rte_spinlock_t global_env_cfg_lock = RTE_SPINLOCK_INITIALIZER;
  16
  17 /* function pointers */
  18 rte_power_freqs_t rte_power_freqs  = NULL;
  19 rte_power_get_freq_t rte_power_get_freq = NULL;
  20 rte_power_set_freq_t rte_power_set_freq = NULL;
  21 rte_power_freq_change_t rte_power_freq_up = NULL;
  22 rte_power_freq_change_t rte_power_freq_down = NULL;
  23 rte_power_freq_change_t rte_power_freq_max = NULL;
  24 rte_power_freq_change_t rte_power_freq_min = NULL;
  25 rte_power_freq_change_t rte_power_turbo_status;
  26 rte_power_freq_change_t rte_power_freq_enable_turbo;
  27 rte_power_freq_change_t rte_power_freq_disable_turbo;
  28 rte_power_get_capabilities_t rte_power_get_capabilities;
  29
  30 static void
  31 reset_power_function_ptrs(void)
  32 {
  33         rte_power_freqs  = NULL;
  34         rte_power_get_freq = NULL;
  35         rte_power_set_freq = NULL;
  36         rte_power_freq_up = NULL;
  37         rte_power_freq_down = NULL;
  38         rte_power_freq_max = NULL;
  39         rte_power_freq_min = NULL;
  40         rte_power_turbo_status = NULL;
  41         rte_power_freq_enable_turbo = NULL;
  42         rte_power_freq_disable_turbo = NULL;
  43         rte_power_get_capabilities = NULL;
  44 }
  45
  46 int
  47 rte_power_set_env(enum power_management_env env)
  48 {
  49         rte_spinlock_lock(&global_env_cfg_lock);
  50
  51         if (global_default_env != PM_ENV_NOT_SET) {
  52                 RTE_LOG(ERR, POWER, "Power Management Environment already set.\n");
  53                 rte_spinlock_unlock(&global_env_cfg_lock);
  54                 return -1;
  55         }
  56
  57         int ret = 0;
  58
  59         if (env == PM_ENV_ACPI_CPUFREQ) {
  60                 rte_power_freqs = power_acpi_cpufreq_freqs;
  61                 rte_power_get_freq = power_acpi_cpufreq_get_freq;
  62                 rte_power_set_freq = power_acpi_cpufreq_set_freq;
  63                 rte_power_freq_up = power_acpi_cpufreq_freq_up;
  64                 rte_power_freq_down = power_acpi_cpufreq_freq_down;
  65                 rte_power_freq_min = power_acpi_cpufreq_freq_min;
  66                 rte_power_freq_max = power_acpi_cpufreq_freq_max;
  67                 rte_power_turbo_status = power_acpi_turbo_status;
  68                 rte_power_freq_enable_turbo = power_acpi_enable_turbo;
  69                 rte_power_freq_disable_turbo = power_acpi_disable_turbo;
  70                 rte_power_get_capabilities = power_acpi_get_capabilities;
  71         } else if (env == PM_ENV_KVM_VM) {
  72                 rte_power_freqs = power_kvm_vm_freqs;
  73                 rte_power_get_freq = power_kvm_vm_get_freq;
  74                 rte_power_set_freq = power_kvm_vm_set_freq;
  75                 rte_power_freq_up = power_kvm_vm_freq_up;
  76                 rte_power_freq_down = power_kvm_vm_freq_down;
  77                 rte_power_freq_min = power_kvm_vm_freq_min;
  78                 rte_power_freq_max = power_kvm_vm_freq_max;
  79                 rte_power_turbo_status = power_kvm_vm_turbo_status;
  80                 rte_power_freq_enable_turbo = power_kvm_vm_enable_turbo;
  81                 rte_power_freq_disable_turbo = power_kvm_vm_disable_turbo;
  82                 rte_power_get_capabilities = power_kvm_vm_get_capabilities;
  83         } else if (env == PM_ENV_PSTATE_CPUFREQ) {
  84                 rte_power_freqs = power_pstate_cpufreq_freqs;
  85                 rte_power_get_freq = power_pstate_cpufreq_get_freq;
  86                 rte_power_set_freq = power_pstate_cpufreq_set_freq;
  87                 rte_power_freq_up = power_pstate_cpufreq_freq_up;
  88                 rte_power_freq_down = power_pstate_cpufreq_freq_down;
  89                 rte_power_freq_min = power_pstate_cpufreq_freq_min;
  90                 rte_power_freq_max = power_pstate_cpufreq_freq_max;
  91                 rte_power_turbo_status = power_pstate_turbo_status;
  92                 rte_power_freq_enable_turbo = power_pstate_enable_turbo;
  93                 rte_power_freq_disable_turbo = power_pstate_disable_turbo;
  94                 rte_power_get_capabilities = power_pstate_get_capabilities;
  95
  96         } else {
  97                 RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
  98                                 env);
  99                 ret = -1;
 100         }
 101
 102         if (ret == 0)
 103                 global_default_env = env;
 104         else {
 105                 global_default_env = PM_ENV_NOT_SET;
 106                 reset_power_function_ptrs();
 107         }
 108
 109         rte_spinlock_unlock(&global_env_cfg_lock);
 110         return ret;
 111 }
 112
 113 void
 114 rte_power_unset_env(void)
 115 {
 116         rte_spinlock_lock(&global_env_cfg_lock);
 117         global_default_env = PM_ENV_NOT_SET;
 118         reset_power_function_ptrs();
 119         rte_spinlock_unlock(&global_env_cfg_lock);
 120 }
 121
 122 enum power_management_env
 123 rte_power_get_env(void) {
 124         return global_default_env;
 125 }
 126
 127 int
 128 rte_power_init(unsigned int lcore_id)
 129 {
 130         int ret = -1;
 131
 132         switch (global_default_env) {
 133         case PM_ENV_ACPI_CPUFREQ:
 134                 return power_acpi_cpufreq_init(lcore_id);
 135         case PM_ENV_KVM_VM:
 136                 return power_kvm_vm_init(lcore_id);
 137         case PM_ENV_PSTATE_CPUFREQ:
 138                 return power_pstate_cpufreq_init(lcore_id);
 139         default:
 140                 RTE_LOG(INFO, POWER, "Env isn't set yet!\n");
 141         }
 142
 143         /* Auto detect Environment */
 144         RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power management...\n");
 145         ret = power_acpi_cpufreq_init(lcore_id);
 146         if (ret == 0) {
 147                 rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
 148                 goto out;
 149         }
 150
 151         RTE_LOG(INFO, POWER, "Attempting to initialise PSTAT power management...\n");
 152         ret = power_pstate_cpufreq_init(lcore_id);
 153         if (ret == 0) {
 154                 rte_power_set_env(PM_ENV_PSTATE_CPUFREQ);
 155                 goto out;
 156         }
 157
 158         RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n");
 159         ret = power_kvm_vm_init(lcore_id);
 160         if (ret == 0) {
 161                 rte_power_set_env(PM_ENV_KVM_VM);
 162                 goto out;
 163         }
 164         RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore "
 165                         "%u\n", lcore_id);
 166 out:
 167         return ret;
 168 }
 169
 170 int
 171 rte_power_exit(unsigned int lcore_id)
 172 {
 173         switch (global_default_env) {
 174         case PM_ENV_ACPI_CPUFREQ:
 175                 return power_acpi_cpufreq_exit(lcore_id);
 176         case PM_ENV_KVM_VM:
 177                 return power_kvm_vm_exit(lcore_id);
 178         case PM_ENV_PSTATE_CPUFREQ:
 179                 return power_pstate_cpufreq_exit(lcore_id);
 180         default:
 181                 RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit gracefully\n");
 182
 183         }
 184         return -1;
 185
 186 }