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Date: Wed, 13 Apr 2022 17:05:08 +0800
From: Meng Li <li.meng@....com>
To: Shuah Khan <skhan@...uxfoundation.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
Huang Rui <ray.huang@....com>, <linux-pm@...r.kernel.org>
CC: Nathan Fontenot <nathan.fontenot@....com>,
Deepak Sharma <deepak.sharma@....com>,
Alex Deucher <alexander.deucher@....com>,
"Mario Limonciello" <mario.limonciello@....com>,
Jinzhou Su <Jinzhou.Su@....com>,
Perry Yuan <Perry.Yuan@....com>,
Xiaojian Du <Xiaojian.Du@....com>,
"Viresh Kumar" <viresh.kumar@...aro.org>,
Borislav Petkov <bp@...en8.de>, <linux-kernel@...r.kernel.org>,
Meng Li <li.meng@....com>
Subject: [PATCH 1/3] 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: Meng Li <li.meng@....com>
---
MAINTAINERS | 1 +
drivers/cpufreq/amd-pstate.c | 60 +----------------------------
include/linux/amd-pstate.h | 74 ++++++++++++++++++++++++++++++++++++
3 files changed, 76 insertions(+), 59 deletions(-)
create mode 100644 include/linux/amd-pstate.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 9832b607e2e2..f108e83ba851 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1003,6 +1003,7 @@ S: Supported
F: Documentation/admin-guide/pm/amd-pstate.rst
F: drivers/cpufreq/amd-pstate*
F: tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
+F: include/linux/amd-pstate.h
AMD PTDMA DRIVER
M: Sanjay R Mehta <sanju.mehta@....com>
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 7be38bc6a673..5f7a00a64f76 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -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);
diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h
new file mode 100644
index 000000000000..790b04c9000b
--- /dev/null
+++ b/include/linux/amd-pstate.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/include/linux/amd-pstate.h
+ *
+ * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
+ * Author: Meng Li <li.meng@....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 */
--
2.25.1
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