128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* linux/include/linux/amd-pstate.h
|
|
*
|
|
* Copyright (C) 2022 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Meng Li <li.meng@amd.com>
|
|
*/
|
|
|
|
#ifndef _LINUX_AMD_PSTATE_H
|
|
#define _LINUX_AMD_PSTATE_H
|
|
|
|
#include <linux/pm_qos.h>
|
|
|
|
#define AMD_CPPC_EPP_PERFORMANCE 0x00
|
|
#define AMD_CPPC_EPP_BALANCE_PERFORMANCE 0x80
|
|
#define AMD_CPPC_EPP_BALANCE_POWERSAVE 0xBF
|
|
#define AMD_CPPC_EPP_POWERSAVE 0xFF
|
|
|
|
/*********************************************************************
|
|
* 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 {
|
|
u64 aperf;
|
|
u64 mperf;
|
|
u64 tsc;
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
* @max_freq: the frequency that mapped to highest_perf
|
|
* @min_freq: the frequency that mapped to lowest_perf
|
|
* @nominal_freq: the frequency that mapped to nominal_perf
|
|
* @lowest_nonlinear_freq: the frequency 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
|
|
* @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 {
|
|
int cpu;
|
|
|
|
struct freq_qos_request req[2];
|
|
u64 cppc_req_cached;
|
|
|
|
u32 highest_perf;
|
|
u32 nominal_perf;
|
|
u32 lowest_nonlinear_perf;
|
|
u32 lowest_perf;
|
|
u32 prefcore_ranking;
|
|
u32 min_limit_perf;
|
|
u32 max_limit_perf;
|
|
u32 min_limit_freq;
|
|
u32 max_limit_freq;
|
|
|
|
u32 max_freq;
|
|
u32 min_freq;
|
|
u32 nominal_freq;
|
|
u32 lowest_nonlinear_freq;
|
|
|
|
struct amd_aperf_mperf cur;
|
|
struct amd_aperf_mperf prev;
|
|
|
|
u64 freq;
|
|
bool boost_supported;
|
|
bool hw_prefcore;
|
|
|
|
/* EPP feature related attributes*/
|
|
s16 epp_policy;
|
|
s16 epp_cached;
|
|
u32 policy;
|
|
u64 cppc_cap1_cached;
|
|
bool suspended;
|
|
};
|
|
|
|
/*
|
|
* enum amd_pstate_mode - driver working mode of amd pstate
|
|
*/
|
|
enum amd_pstate_mode {
|
|
AMD_PSTATE_UNDEFINED = 0,
|
|
AMD_PSTATE_DISABLE,
|
|
AMD_PSTATE_PASSIVE,
|
|
AMD_PSTATE_ACTIVE,
|
|
AMD_PSTATE_GUIDED,
|
|
AMD_PSTATE_MAX,
|
|
};
|
|
|
|
static const char * const amd_pstate_mode_string[] = {
|
|
[AMD_PSTATE_UNDEFINED] = "undefined",
|
|
[AMD_PSTATE_DISABLE] = "disable",
|
|
[AMD_PSTATE_PASSIVE] = "passive",
|
|
[AMD_PSTATE_ACTIVE] = "active",
|
|
[AMD_PSTATE_GUIDED] = "guided",
|
|
NULL,
|
|
};
|
|
#endif /* _LINUX_AMD_PSTATE_H */
|