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Wyatt IV" To: linux-pm@vger.kernel.org, "Thomas Renninger" , "Shuah Khan" , "Shuah Khan" Cc: "John B. Wyatt IV" , linux-kernel@vger.kernel.org, "John Kacur" , "Tomas Glozar" , "John B. Wyatt IV" Subject: [PATCH 1/2] Add SWIG bindings files for libcpupower Date: Wed, 24 Jul 2024 18:11:19 -0400 Message-ID: <20240724221122.54601-2-jwyatt@redhat.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240724221122.54601-1-jwyatt@redhat.com> References: <20240724221122.54601-1-jwyatt@redhat.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 SWIG is a tool packaged in Fedora and other distros that can generate bindings from C and C++ code for several languages including Python, Perl, and Go. A latter commit will demonstrate taking a SWIG .i file and the libcpupower object files to generate the bindings. Note that while SWIG itself is GPL v3+ licensed; the resulting output, the bindings code, is permissively licensed. Please see https://swig.org/legal.html for more details. Signed-off-by: John B. Wyatt IV Signed-off-by: John B. Wyatt IV --- .../power/cpupower/bindings/python/.gitignore | 8 ++++ tools/power/cpupower/bindings/python/Makefile | 31 +++++++++++++ tools/power/cpupower/bindings/python/README | 33 ++++++++++++++ .../bindings/python/raw_pylibcpupower.i | 45 +++++++++++++++++++ 4 files changed, 117 insertions(+) create mode 100644 tools/power/cpupower/bindings/python/.gitignore create mode 100644 tools/power/cpupower/bindings/python/Makefile create mode 100644 tools/power/cpupower/bindings/python/README create mode 100644 tools/power/cpupower/bindings/python/raw_pylibcpupower.i diff --git a/tools/power/cpupower/bindings/python/.gitignore b/tools/power/cpupower/bindings/python/.gitignore new file mode 100644 index 000000000000..b83e0f5e26a0 --- /dev/null +++ b/tools/power/cpupower/bindings/python/.gitignore @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +__pycache__/ +*.c +*.o +*.so +*.py +!test_raw_pylibcpupower.py +!raw_pylibcpupower.i # git keeps ignoring this file diff --git a/tools/power/cpupower/bindings/python/Makefile b/tools/power/cpupower/bindings/python/Makefile new file mode 100644 index 000000000000..a6c779333f8d --- /dev/null +++ b/tools/power/cpupower/bindings/python/Makefile @@ -0,0 +1,31 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Makefile for libcpupower Python bindings +# +# This Makefile expects you have already run the makefile for cpupower to build +# the .o files in the lib directory for the bindings to be created. + +CC=gcc + +LIB_DIR = ../../lib +BIND_DIR = . +PY_INCLUDE := $(firstword $(shell python-config --includes)) +#PY_INCLUDE = $(shell python-config --includes | awk '{ print $1 }') + +OBJECTS_LIB = $(wildcard $(LIB_DIR)/*.o) +OBJECTS_BIND = $(wildcard $(BIND_DIR)/*.o) + +all: _raw_pylibcpupower.so + +_raw_pylibcpupower.so: raw_pylibcpupower_wrap.o + $(CC) -shared $(OBJECTS_LIB) raw_pylibcpupower_wrap.o -o _raw_pylibcpupower.so # raw_pylibcpupower_wrap.o +# $(CC) -shared $(OBJECTS_BIND) $(OBJECTS_LIB) -o _raw_pylibcpupower.so # raw_pylibcpupower_wrap.o + +raw_pylibcpupower_wrap.o: raw_pylibcpupower_wrap.c + $(CC) -fPIC -c raw_pylibcpupower_wrap.c $(PY_INCLUDE) + +raw_pylibcpupower_wrap.c: raw_pylibcpupower.i + swig -python raw_pylibcpupower.i + +# Will only clean the bindings folder; will not clean the actual cpupower folder +clean: + rm -f raw_pylibcpupower.py raw_pylibcpupower_wrap.c raw_pylibcpupower_wrap.o _raw_pylibcpupower.so diff --git a/tools/power/cpupower/bindings/python/README b/tools/power/cpupower/bindings/python/README new file mode 100644 index 000000000000..a2663a2d23d1 --- /dev/null +++ b/tools/power/cpupower/bindings/python/README @@ -0,0 +1,33 @@ + +This folder contains the necessary files to build Python bindings for libcpupower. + +To begin, first build the object files for libcpupower by running make in +the cpupower directory. + +Next you will need to install SWIG. Using Fedora: + +sudo dnf install swig + +Please check that your version of SWIG is compatible with the version of +Python installed on your machine by checking the SWIG changelog on their +website. https://swig.org/ + +Then return to the directory this README is in to run: + +make + +To run the test script: + +python test_raw_pylibcpupower.py + +Note that while SWIG itself is GPL v3+ licensed; the resulting output, +the bindings code, is permissively licensed. Please see +https://swig.org/legal.html for more details. + +Original Bindings Author: +John B. Wyatt IV +jwyatt@redhat.com +sageofredondo@gmail.com + +Copyright (C) 2024 Red Hat + diff --git a/tools/power/cpupower/bindings/python/raw_pylibcpupower.i b/tools/power/cpupower/bindings/python/raw_pylibcpupower.i new file mode 100644 index 000000000000..9a920ecf1f47 --- /dev/null +++ b/tools/power/cpupower/bindings/python/raw_pylibcpupower.i @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +%module raw_pylibcpupower +%{ +#include "../../lib/cpupower_intern.h" +#include "../../lib/acpi_cppc.h" +#include "../../lib/cpufreq.h" +#include "../../lib/cpuidle.h" +#include "../../lib/cpupower.h" +#include "../../lib/powercap.h" +%} + +/* + * cpuidle.h + */ + +unsigned int cpuidle_state_count(unsigned int cpu); +int cpuidle_state_disable(unsigned int cpu, unsigned int idlestate, unsigned int disable); + +/* + * cpupower.h + */ + +struct cpupower_topology { + /* Amount of CPU cores, packages and threads per core in the system */ + unsigned int cores; + unsigned int pkgs; + unsigned int threads; /* per core */ + + /* Array gets mallocated with cores entries, holding per core info */ + struct cpuid_core_info *core_info; +}; + +struct cpuid_core_info { + int pkg; + int core; + int cpu; + + /* flags */ + unsigned int is_online:1; +}; + +int get_cpu_topology(struct cpupower_topology *cpu_top); +void cpu_topology_release(struct cpupower_topology cpu_top); +int cpupower_is_cpu_online(unsigned int cpu);