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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <rte_atomic.h>
#include "rte_power.h"
#include "rte_power_acpi_cpufreq.h"
#include "rte_power_kvm_vm.h"
#include "rte_power_common.h"
enum power_management_env global_default_env = PM_ENV_NOT_SET;
volatile uint32_t global_env_cfg_status = 0;
/* function pointers */
rte_power_freqs_t rte_power_freqs = NULL;
rte_power_get_freq_t rte_power_get_freq = NULL;
rte_power_set_freq_t rte_power_set_freq = NULL;
rte_power_freq_change_t rte_power_freq_up = NULL;
rte_power_freq_change_t rte_power_freq_down = NULL;
rte_power_freq_change_t rte_power_freq_max = NULL;
rte_power_freq_change_t rte_power_freq_min = NULL;
int
rte_power_set_env(enum power_management_env env)
{
if (rte_atomic32_cmpset(&global_env_cfg_status, 0, 1) == 0) {
return 0;
}
if (env == PM_ENV_ACPI_CPUFREQ) {
rte_power_freqs = rte_power_acpi_cpufreq_freqs;
rte_power_get_freq = rte_power_acpi_cpufreq_get_freq;
rte_power_set_freq = rte_power_acpi_cpufreq_set_freq;
rte_power_freq_up = rte_power_acpi_cpufreq_freq_up;
rte_power_freq_down = rte_power_acpi_cpufreq_freq_down;
rte_power_freq_min = rte_power_acpi_cpufreq_freq_min;
rte_power_freq_max = rte_power_acpi_cpufreq_freq_max;
} else if (env == PM_ENV_KVM_VM) {
rte_power_freqs = rte_power_kvm_vm_freqs;
rte_power_get_freq = rte_power_kvm_vm_get_freq;
rte_power_set_freq = rte_power_kvm_vm_set_freq;
rte_power_freq_up = rte_power_kvm_vm_freq_up;
rte_power_freq_down = rte_power_kvm_vm_freq_down;
rte_power_freq_min = rte_power_kvm_vm_freq_min;
rte_power_freq_max = rte_power_kvm_vm_freq_max;
} else {
RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
env);
rte_power_unset_env();
return -1;
}
global_default_env = env;
return 0;
}
void
rte_power_unset_env(void)
{
if (rte_atomic32_cmpset(&global_env_cfg_status, 1, 0) != 0)
global_default_env = PM_ENV_NOT_SET;
}
enum power_management_env
rte_power_get_env(void) {
return global_default_env;
}
int
rte_power_init(unsigned lcore_id)
{
int ret = -1;
if (global_default_env == PM_ENV_ACPI_CPUFREQ) {
return rte_power_acpi_cpufreq_init(lcore_id);
}
if (global_default_env == PM_ENV_KVM_VM) {
return rte_power_kvm_vm_init(lcore_id);
}
/* Auto detect Environment */
RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power "
"management...\n");
ret = rte_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 VM power management...\n");
ret = rte_power_kvm_vm_init(lcore_id);
if (ret == 0) {
rte_power_set_env(PM_ENV_KVM_VM);
goto out;
}
RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore "
"%u\n", lcore_id);
out:
return ret;
}
int
rte_power_exit(unsigned lcore_id)
{
if (global_default_env == PM_ENV_ACPI_CPUFREQ)
return rte_power_acpi_cpufreq_exit(lcore_id);
if (global_default_env == PM_ENV_KVM_VM)
return rte_power_kvm_vm_exit(lcore_id);
RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit "
"gracefully\n");
return -1;
}
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