lib/librte_power/rte_power.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <rte_atomic.h>
  35
  36 #include "rte_power.h"
  37 #include "rte_power_acpi_cpufreq.h"
  38 #include "rte_power_kvm_vm.h"
  39 #include "rte_power_common.h"
  40
  41 enum power_management_env global_default_env = PM_ENV_NOT_SET;
  42
  43 volatile uint32_t global_env_cfg_status = 0;
  44
  45 /* function pointers */
  46 rte_power_freqs_t rte_power_freqs  = NULL;
  47 rte_power_get_freq_t rte_power_get_freq = NULL;
  48 rte_power_set_freq_t rte_power_set_freq = NULL;
  49 rte_power_freq_change_t rte_power_freq_up = NULL;
  50 rte_power_freq_change_t rte_power_freq_down = NULL;
  51 rte_power_freq_change_t rte_power_freq_max = NULL;
  52 rte_power_freq_change_t rte_power_freq_min = NULL;
  53 rte_power_freq_change_t rte_power_turbo_status;
  54 rte_power_freq_change_t rte_power_freq_enable_turbo;
  55 rte_power_freq_change_t rte_power_freq_disable_turbo;
  56
  57 int
  58 rte_power_set_env(enum power_management_env env)
  59 {
  60         if (rte_atomic32_cmpset(&global_env_cfg_status, 0, 1) == 0) {
  61                 return 0;
  62         }
  63         if (env == PM_ENV_ACPI_CPUFREQ) {
  64                 rte_power_freqs = rte_power_acpi_cpufreq_freqs;
  65                 rte_power_get_freq = rte_power_acpi_cpufreq_get_freq;
  66                 rte_power_set_freq = rte_power_acpi_cpufreq_set_freq;
  67                 rte_power_freq_up = rte_power_acpi_cpufreq_freq_up;
  68                 rte_power_freq_down = rte_power_acpi_cpufreq_freq_down;
  69                 rte_power_freq_min = rte_power_acpi_cpufreq_freq_min;
  70                 rte_power_freq_max = rte_power_acpi_cpufreq_freq_max;
  71                 rte_power_turbo_status = rte_power_acpi_turbo_status;
  72                 rte_power_freq_enable_turbo = rte_power_acpi_enable_turbo;
  73                 rte_power_freq_disable_turbo = rte_power_acpi_disable_turbo;
  74         } else if (env == PM_ENV_KVM_VM) {
  75                 rte_power_freqs = rte_power_kvm_vm_freqs;
  76                 rte_power_get_freq = rte_power_kvm_vm_get_freq;
  77                 rte_power_set_freq = rte_power_kvm_vm_set_freq;
  78                 rte_power_freq_up = rte_power_kvm_vm_freq_up;
  79                 rte_power_freq_down = rte_power_kvm_vm_freq_down;
  80                 rte_power_freq_min = rte_power_kvm_vm_freq_min;
  81                 rte_power_freq_max = rte_power_kvm_vm_freq_max;
  82                 rte_power_turbo_status = rte_power_kvm_vm_turbo_status;
  83                 rte_power_freq_enable_turbo = rte_power_kvm_vm_enable_turbo;
  84                 rte_power_freq_disable_turbo = rte_power_kvm_vm_disable_turbo;
  85         } else {
  86                 RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
  87                                 env);
  88                 rte_power_unset_env();
  89                 return -1;
  90         }
  91         global_default_env = env;
  92         return 0;
  93
  94 }
  95
  96 void
  97 rte_power_unset_env(void)
  98 {
  99         if (rte_atomic32_cmpset(&global_env_cfg_status, 1, 0) != 0)
 100                 global_default_env = PM_ENV_NOT_SET;
 101 }
 102
 103 enum power_management_env
 104 rte_power_get_env(void) {
 105         return global_default_env;
 106 }
 107
 108 int
 109 rte_power_init(unsigned lcore_id)
 110 {
 111         int ret = -1;
 112
 113         if (global_default_env == PM_ENV_ACPI_CPUFREQ) {
 114                 return rte_power_acpi_cpufreq_init(lcore_id);
 115         }
 116         if (global_default_env == PM_ENV_KVM_VM) {
 117                 return rte_power_kvm_vm_init(lcore_id);
 118         }
 119         /* Auto detect Environment */
 120         RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power "
 121                         "management...\n");
 122         ret = rte_power_acpi_cpufreq_init(lcore_id);
 123         if (ret == 0) {
 124                 rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
 125                 goto out;
 126         }
 127
 128         RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n");
 129         ret = rte_power_kvm_vm_init(lcore_id);
 130         if (ret == 0) {
 131                 rte_power_set_env(PM_ENV_KVM_VM);
 132                 goto out;
 133         }
 134         RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore "
 135                         "%u\n", lcore_id);
 136 out:
 137         return ret;
 138 }
 139
 140 int
 141 rte_power_exit(unsigned lcore_id)
 142 {
 143         if (global_default_env == PM_ENV_ACPI_CPUFREQ)
 144                 return rte_power_acpi_cpufreq_exit(lcore_id);
 145         if (global_default_env == PM_ENV_KVM_VM)
 146                 return rte_power_kvm_vm_exit(lcore_id);
 147
 148         RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit "
 149                                 "gracefully\n");
 150         return -1;
 151
 152 }