* Copyright(c) 2010-2014 Intel Corporation
*/
-#include <rte_atomic.h>
+#include <rte_spinlock.h>
#include "rte_power.h"
#include "power_acpi_cpufreq.h"
#include "power_kvm_vm.h"
+#include "power_pstate_cpufreq.h"
#include "power_common.h"
enum power_management_env global_default_env = PM_ENV_NOT_SET;
-volatile uint32_t global_env_cfg_status = 0;
+static rte_spinlock_t global_env_cfg_lock = RTE_SPINLOCK_INITIALIZER;
/* function pointers */
rte_power_freqs_t rte_power_freqs = NULL;
rte_power_freq_change_t rte_power_turbo_status;
rte_power_freq_change_t rte_power_freq_enable_turbo;
rte_power_freq_change_t rte_power_freq_disable_turbo;
+rte_power_get_capabilities_t rte_power_get_capabilities;
+
+static void
+reset_power_function_ptrs(void)
+{
+ rte_power_freqs = NULL;
+ rte_power_get_freq = NULL;
+ rte_power_set_freq = NULL;
+ rte_power_freq_up = NULL;
+ rte_power_freq_down = NULL;
+ rte_power_freq_max = NULL;
+ rte_power_freq_min = NULL;
+ rte_power_turbo_status = NULL;
+ rte_power_freq_enable_turbo = NULL;
+ rte_power_freq_disable_turbo = NULL;
+ rte_power_get_capabilities = NULL;
+}
int
rte_power_set_env(enum power_management_env env)
{
- if (rte_atomic32_cmpset(&global_env_cfg_status, 0, 1) == 0) {
- return 0;
+ rte_spinlock_lock(&global_env_cfg_lock);
+
+ if (global_default_env != PM_ENV_NOT_SET) {
+ RTE_LOG(ERR, POWER, "Power Management Environment already set.\n");
+ rte_spinlock_unlock(&global_env_cfg_lock);
+ return -1;
}
+
+ int ret = 0;
+
if (env == PM_ENV_ACPI_CPUFREQ) {
rte_power_freqs = power_acpi_cpufreq_freqs;
rte_power_get_freq = power_acpi_cpufreq_get_freq;
rte_power_turbo_status = power_acpi_turbo_status;
rte_power_freq_enable_turbo = power_acpi_enable_turbo;
rte_power_freq_disable_turbo = power_acpi_disable_turbo;
+ rte_power_get_capabilities = power_acpi_get_capabilities;
} else if (env == PM_ENV_KVM_VM) {
rte_power_freqs = power_kvm_vm_freqs;
rte_power_get_freq = power_kvm_vm_get_freq;
rte_power_turbo_status = power_kvm_vm_turbo_status;
rte_power_freq_enable_turbo = power_kvm_vm_enable_turbo;
rte_power_freq_disable_turbo = power_kvm_vm_disable_turbo;
+ rte_power_get_capabilities = power_kvm_vm_get_capabilities;
+ } else if (env == PM_ENV_PSTATE_CPUFREQ) {
+ rte_power_freqs = power_pstate_cpufreq_freqs;
+ rte_power_get_freq = power_pstate_cpufreq_get_freq;
+ rte_power_set_freq = power_pstate_cpufreq_set_freq;
+ rte_power_freq_up = power_pstate_cpufreq_freq_up;
+ rte_power_freq_down = power_pstate_cpufreq_freq_down;
+ rte_power_freq_min = power_pstate_cpufreq_freq_min;
+ rte_power_freq_max = power_pstate_cpufreq_freq_max;
+ rte_power_turbo_status = power_pstate_turbo_status;
+ rte_power_freq_enable_turbo = power_pstate_enable_turbo;
+ rte_power_freq_disable_turbo = power_pstate_disable_turbo;
+ rte_power_get_capabilities = power_pstate_get_capabilities;
+
} else {
RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
env);
- rte_power_unset_env();
- return -1;
+ ret = -1;
}
- global_default_env = env;
- return 0;
+ if (ret == 0)
+ global_default_env = env;
+ else {
+ global_default_env = PM_ENV_NOT_SET;
+ reset_power_function_ptrs();
+ }
+
+ rte_spinlock_unlock(&global_env_cfg_lock);
+ return ret;
}
void
rte_power_unset_env(void)
{
- if (rte_atomic32_cmpset(&global_env_cfg_status, 1, 0) != 0)
- global_default_env = PM_ENV_NOT_SET;
+ rte_spinlock_lock(&global_env_cfg_lock);
+ global_default_env = PM_ENV_NOT_SET;
+ reset_power_function_ptrs();
+ rte_spinlock_unlock(&global_env_cfg_lock);
}
enum power_management_env
{
int ret = -1;
- if (global_default_env == PM_ENV_ACPI_CPUFREQ) {
+ switch (global_default_env) {
+ case PM_ENV_ACPI_CPUFREQ:
return power_acpi_cpufreq_init(lcore_id);
- }
- if (global_default_env == PM_ENV_KVM_VM) {
+ case PM_ENV_KVM_VM:
return power_kvm_vm_init(lcore_id);
+ case PM_ENV_PSTATE_CPUFREQ:
+ return power_pstate_cpufreq_init(lcore_id);
+ default:
+ RTE_LOG(INFO, POWER, "Env isn't set yet!\n");
}
+
/* Auto detect Environment */
- RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power "
- "management...\n");
+ RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power management...\n");
ret = power_acpi_cpufreq_init(lcore_id);
if (ret == 0) {
rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
goto out;
}
+ RTE_LOG(INFO, POWER, "Attempting to initialise PSTAT power management...\n");
+ ret = power_pstate_cpufreq_init(lcore_id);
+ if (ret == 0) {
+ rte_power_set_env(PM_ENV_PSTATE_CPUFREQ);
+ goto out;
+ }
+
RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n");
ret = power_kvm_vm_init(lcore_id);
if (ret == 0) {
int
rte_power_exit(unsigned int lcore_id)
{
- if (global_default_env == PM_ENV_ACPI_CPUFREQ)
+ switch (global_default_env) {
+ case PM_ENV_ACPI_CPUFREQ:
return power_acpi_cpufreq_exit(lcore_id);
- if (global_default_env == PM_ENV_KVM_VM)
+ case PM_ENV_KVM_VM:
return power_kvm_vm_exit(lcore_id);
+ case PM_ENV_PSTATE_CPUFREQ:
+ return power_pstate_cpufreq_exit(lcore_id);
+ default:
+ RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit gracefully\n");
- RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit "
- "gracefully\n");
+ }
return -1;
}