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 } 153