99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
229 lines
5.5 KiB
C
229 lines
5.5 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2018 Intel Corporation
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*/
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#ifndef _POWER_PSTATE_CPUFREQ_H
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#define _POWER_PSTATE_CPUFREQ_H
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/**
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* @file
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* RTE Power Management via Intel Pstate driver
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*/
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#include <rte_common.h>
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#include <rte_byteorder.h>
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#include <rte_log.h>
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#include <rte_string_fns.h>
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#include "rte_power.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Check if pstate power management is supported.
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*
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* @return
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* - 1 if supported
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* - 0 if unsupported
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* - -1 if error, with rte_errno indicating reason for error.
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*/
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int power_pstate_cpufreq_check_supported(void);
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/**
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* Initialize power management for a specific lcore. It will check and set the
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* governor to performance for the lcore, get the available frequencies, and
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* prepare to set new lcore frequency.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 0 on success.
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* - Negative on error.
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*/
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int power_pstate_cpufreq_init(unsigned int lcore_id);
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/**
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* Exit power management on a specific lcore. It will set the governor to which
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* is before initialized.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 0 on success.
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* - Negative on error.
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*/
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int power_pstate_cpufreq_exit(unsigned int lcore_id);
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/**
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* Get the available frequencies of a specific lcore. The return value will be
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* the minimal one of the total number of available frequencies and the number
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* of buffer. The index of available frequencies used in other interfaces
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* should be in the range of 0 to this return value.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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* @param freqs
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* The buffer array to save the frequencies.
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* @param num
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* The number of frequencies to get.
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*
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* @return
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* The number of available frequencies.
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*/
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uint32_t power_pstate_cpufreq_freqs(unsigned int lcore_id, uint32_t *freqs,
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uint32_t num);
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/**
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* Return the current index of available frequencies of a specific lcore.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* The current index of available frequencies.
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* If error, it will return 'RTE_POWER_INVALID_FREQ_INDEX = (~0)'.
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*/
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uint32_t power_pstate_cpufreq_get_freq(unsigned int lcore_id);
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/**
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* Set the new frequency for a specific lcore by indicating the index of
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* available frequencies.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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* @param index
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* The index of available frequencies.
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*
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* @return
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* - 1 on success with frequency changed.
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* - 0 on success without frequency changed.
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* - Negative on error.
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*/
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int power_pstate_cpufreq_set_freq(unsigned int lcore_id, uint32_t index);
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/**
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* Scale up the frequency of a specific lcore according to the available
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* frequencies.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 1 on success with frequency changed.
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* - 0 on success without frequency changed.
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* - Negative on error.
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*/
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int power_pstate_cpufreq_freq_up(unsigned int lcore_id);
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/**
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* Scale down the frequency of a specific lcore according to the available
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* frequencies.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 1 on success with frequency changed.
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* - 0 on success without frequency changed.
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* - Negative on error.
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*/
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int power_pstate_cpufreq_freq_down(unsigned int lcore_id);
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/**
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* Scale up the frequency of a specific lcore to the highest according to the
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* available frequencies.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 1 on success with frequency changed.
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* - 0 on success without frequency changed.
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* - Negative on error.
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*/
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int power_pstate_cpufreq_freq_max(unsigned int lcore_id);
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/**
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* Scale down the frequency of a specific lcore to the lowest according to the
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* available frequencies.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 1 on success with frequency changed.
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* - 0 on success without frequency changed.
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* - Negative on error.
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*/
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int power_pstate_cpufreq_freq_min(unsigned int lcore_id);
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/**
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* Get the turbo status of a specific lcore.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 1 Turbo Boost is enabled on this lcore.
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* - 0 Turbo Boost is disabled on this lcore.
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* - Negative on error.
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*/
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int power_pstate_turbo_status(unsigned int lcore_id);
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/**
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* Enable Turbo Boost on a specific lcore.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 0 Turbo Boost is enabled successfully on this lcore.
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* - Negative on error.
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*/
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int power_pstate_enable_turbo(unsigned int lcore_id);
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/**
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* Disable Turbo Boost on a specific lcore.
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* It should be protected outside of this function for threadsafe.
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*
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* @param lcore_id
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* lcore id.
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*
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* @return
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* - 0 Turbo Boost disabled successfully on this lcore.
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* - Negative on error.
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*/
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int power_pstate_disable_turbo(unsigned int lcore_id);
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/**
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* Returns power capabilities for a specific lcore.
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*
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* @param lcore_id
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* lcore id.
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* @param caps
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* pointer to rte_power_core_capabilities object.
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*
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* @return
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* - 0 on success.
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* - Negative on error.
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*/
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int power_pstate_get_capabilities(unsigned int lcore_id,
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struct rte_power_core_capabilities *caps);
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#ifdef __cplusplus
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}
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#endif
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#endif
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