Commit f1375ec1 authored by Meng Li's avatar Meng Li Committed by Shuah Khan
Browse files

cpufreq: amd-pstate: Expose struct amd_cpudata 



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: default avatarMeng Li <li.meng@amd.com>
Acked-by: default avatarHuang Rui <ray.huang@amd.com>
Acked-by: default avatarShuah Khan <skhan@linuxfoundation.org>
Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
parent 0e29bc0e

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
































drivers/cpufreq/amd-pstate.c



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−59






























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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);
































include/linux/amd-pstate.h
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/* 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 */