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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (C) 2022 Advanced Micro Devices, Inc.4 *5 * Author: Meng Li <li.meng@amd.com>6 */7 8#ifndef _LINUX_AMD_PSTATE_H9#define _LINUX_AMD_PSTATE_H10 11#include <linux/pm_qos.h>12 13/*********************************************************************14 * AMD P-state INTERFACE *15 *********************************************************************/16/**17 * struct amd_aperf_mperf18 * @aperf: actual performance frequency clock count19 * @mperf: maximum performance frequency clock count20 * @tsc: time stamp counter21 */22struct amd_aperf_mperf {23 u64 aperf;24 u64 mperf;25 u64 tsc;26};27 28/**29 * struct amd_cpudata - private CPU data for AMD P-State30 * @cpu: CPU number31 * @req: constraint request to apply32 * @cppc_req_cached: cached performance request hints33 * @highest_perf: the maximum performance an individual processor may reach,34 * assuming ideal conditions35 * For platforms that do not support the preferred core feature, the36 * highest_pef may be configured with 166 or 255, to avoid max frequency37 * calculated wrongly. we take the fixed value as the highest_perf.38 * @nominal_perf: the maximum sustained performance level of the processor,39 * assuming ideal operating conditions40 * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power41 * savings are achieved42 * @lowest_perf: the absolute lowest performance level of the processor43 * @prefcore_ranking: the preferred core ranking, the higher value indicates a higher44 * priority.45 * @min_limit_perf: Cached value of the performance corresponding to policy->min46 * @max_limit_perf: Cached value of the performance corresponding to policy->max47 * @min_limit_freq: Cached value of policy->min (in khz)48 * @max_limit_freq: Cached value of policy->max (in khz)49 * @max_freq: the frequency (in khz) that mapped to highest_perf50 * @min_freq: the frequency (in khz) that mapped to lowest_perf51 * @nominal_freq: the frequency (in khz) that mapped to nominal_perf52 * @lowest_nonlinear_freq: the frequency (in khz) that mapped to lowest_nonlinear_perf53 * @cur: Difference of Aperf/Mperf/tsc count between last and current sample54 * @prev: Last Aperf/Mperf/tsc count value read from register55 * @freq: current cpu frequency value (in khz)56 * @boost_supported: check whether the Processor or SBIOS supports boost mode57 * @hw_prefcore: check whether HW supports preferred core featue.58 * Only when hw_prefcore and early prefcore param are true,59 * AMD P-State driver supports preferred core featue.60 * @epp_policy: Last saved policy used to set energy-performance preference61 * @epp_cached: Cached CPPC energy-performance preference value62 * @policy: Cpufreq policy value63 * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value64 *65 * The amd_cpudata is key private data for each CPU thread in AMD P-State, and66 * represents all the attributes and goals that AMD P-State requests at runtime.67 */68struct amd_cpudata {69 int cpu;70 71 struct freq_qos_request req[2];72 u64 cppc_req_cached;73 74 u32 highest_perf;75 u32 nominal_perf;76 u32 lowest_nonlinear_perf;77 u32 lowest_perf;78 u32 prefcore_ranking;79 u32 min_limit_perf;80 u32 max_limit_perf;81 u32 min_limit_freq;82 u32 max_limit_freq;83 84 u32 max_freq;85 u32 min_freq;86 u32 nominal_freq;87 u32 lowest_nonlinear_freq;88 89 struct amd_aperf_mperf cur;90 struct amd_aperf_mperf prev;91 92 u64 freq;93 bool boost_supported;94 bool hw_prefcore;95 96 /* EPP feature related attributes*/97 s16 epp_policy;98 s16 epp_cached;99 u32 policy;100 u64 cppc_cap1_cached;101 bool suspended;102 s16 epp_default;103 bool boost_state;104};105 106/*107 * enum amd_pstate_mode - driver working mode of amd pstate108 */109enum amd_pstate_mode {110 AMD_PSTATE_UNDEFINED = 0,111 AMD_PSTATE_DISABLE,112 AMD_PSTATE_PASSIVE,113 AMD_PSTATE_ACTIVE,114 AMD_PSTATE_GUIDED,115 AMD_PSTATE_MAX,116};117const char *amd_pstate_get_mode_string(enum amd_pstate_mode mode);118int amd_pstate_update_status(const char *buf, size_t size);119 120#endif /* _LINUX_AMD_PSTATE_H */121