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cpufreq: amd-pstate: Expose struct amd_cpudata

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Expose struct amd_cpudata to AMD P-State unit test module.

This data struct will be used on the following AMD P-State unit test
(amd-pstate-ut) module. The amd-pstate-ut module can get some
AMD infomations by this data struct. For example: highest perf,
nominal perf, boost supported etc.

Signed-off-by: Meng Li <li.meng@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Meng Li 2022-08-17 11:46:27 +08:00 committed by Shuah Khan
parent 0e29bc0eba
commit f1375ec1df
3 changed files with 79 additions and 59 deletions
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1
MAINTAINERS
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@ -1045,6 +1045,7 @@ L: linux-pm@vger.kernel.org
S: Supported
F: Documentation/admin-guide/pm/amd-pstate.rst
F: drivers/cpufreq/amd-pstate*
F: include/linux/amd-pstate.h
F: tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
AMD PTDMA DRIVER

60
drivers/cpufreq/amd-pstate.c
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@ -36,6 +36,7 @@
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <linux/static_call.h>
#include <linux/amd-pstate.h>
#include <acpi/processor.h>
#include <acpi/cppc_acpi.h>
@ -65,65 +66,6 @@ MODULE_PARM_DESC(shared_mem,
static struct cpufreq_driver amd_pstate_driver;
/**
* 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
* @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
* @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
*
* 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 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;
};
static inline int pstate_enable(bool enable)
{
return wrmsrl_safe(MSR_AMD_CPPC_ENABLE, enable);

77
include/linux/amd-pstate.h Normal file
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@ -0,0 +1,77 @@
/* 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>
/*********************************************************************
* 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
* @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
* @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
*
* 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 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;
};
#endif /* _LINUX_AMD_PSTATE_H */