/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2022 Advanced Micro Devices, Inc. * * Author: Meng Li <[email protected]> */ #ifndef _LINUX_AMD_PSTATE_H #define _LINUX_AMD_PSTATE_H #include <linux/pm_qos.h> /********************************************************************* * AMD P-state INTERFACE * *********************************************************************/ /** * struct amd_aperf_mperf * @aperf: actual performance frequency clock count * @mperf: maximum performance frequency clock count * @tsc: time stamp counter */ struct amd_aperf_mperf { … }; /** * struct amd_cpudata - private CPU data for AMD P-State * @cpu: CPU number * @req: constraint request to apply * @cppc_req_cached: cached performance request hints * @highest_perf: the maximum performance an individual processor may reach, * assuming ideal conditions * For platforms that do not support the preferred core feature, the * highest_pef may be configured with 166 or 255, to avoid max frequency * calculated wrongly. we take the fixed value as the highest_perf. * @nominal_perf: the maximum sustained performance level of the processor, * assuming ideal operating conditions * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power * savings are achieved * @lowest_perf: the absolute lowest performance level of the processor * @prefcore_ranking: the preferred core ranking, the higher value indicates a higher * priority. * @min_limit_perf: Cached value of the performance corresponding to policy->min * @max_limit_perf: Cached value of the performance corresponding to policy->max * @min_limit_freq: Cached value of policy->min (in khz) * @max_limit_freq: Cached value of policy->max (in khz) * @max_freq: the frequency (in khz) that mapped to highest_perf * @min_freq: the frequency (in khz) that mapped to lowest_perf * @nominal_freq: the frequency (in khz) that mapped to nominal_perf * @lowest_nonlinear_freq: the frequency (in khz) that mapped to lowest_nonlinear_perf * @cur: Difference of Aperf/Mperf/tsc count between last and current sample * @prev: Last Aperf/Mperf/tsc count value read from register * @freq: current cpu frequency value (in khz) * @boost_supported: check whether the Processor or SBIOS supports boost mode * @hw_prefcore: check whether HW supports preferred core featue. * Only when hw_prefcore and early prefcore param are true, * AMD P-State driver supports preferred core featue. * @epp_policy: Last saved policy used to set energy-performance preference * @epp_cached: Cached CPPC energy-performance preference value * @policy: Cpufreq policy value * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value * * The amd_cpudata is key private data for each CPU thread in AMD P-State, and * represents all the attributes and goals that AMD P-State requests at runtime. */ struct amd_cpudata { … }; #endif /* _LINUX_AMD_PSTATE_H */
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