Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_power / rte_power.c

diff --git a/lib/librte_power/rte_power.c b/lib/librte_power/rte_power.c
new file mode 100644 (file)
index 0000000..998ed1c
--- /dev/null
+++ b/lib/librte_power/rte_power.c
@@ -0,0 +1,143 @@
+/*-
+ *   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;
+
+}