DrmSysfsDriver.hpp

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/*
 * Copyright (c) 2015 - 2025 Intel Corporation
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
#ifndef DRMSYSFSDRIVER_HPP_INCLUDE
#define DRMSYSFSDRIVER_HPP_INCLUDE
 
#include <map>
#include <vector>
 
#include "geopm_topo.h"
 
#include "DrmGpuTopo.hpp"
#include "SysfsDriver.hpp"
 
namespace geopm
{
    class IOGroup;
    class PlatformTopo;
 
    class DrmSysfsDriver: public SysfsDriver
    {
        public:
            DrmSysfsDriver() = delete;
            DrmSysfsDriver(const std::string &drm_directory,
                           const std::string &driver_signal_prefix);
            virtual ~DrmSysfsDriver() = default;
            int domain_type(const std::string &name) const override;
            std::string attribute_path(const std::string &name,
                                       int domain_idx) override;
            std::function<double(const std::string&)> signal_parse(const std::string &signal_name) const override;
            std::function<std::string(double)> control_gen(const std::string &control_name) const override;
            std::string driver(void) const override;
            std::map<std::string, SysfsDriver::properties_s> properties(void) const override;
            std::map<std::string, SysfsDriver::derived_signal_info_s> derived_signals(void) const override;
 
            static std::string plugin_name_drm(void);
            static std::unique_ptr<IOGroup> make_plugin_drm(void);
 
            static std::string plugin_name_accel(void);
            static std::unique_ptr<IOGroup> make_plugin_accel(void);
        private:
            void register_power_signals(void);
            void register_derived_signal_alias(const std::string &alias_name,
                                               const std::string &signal_name);
            std::string lookup_source_signal(const std::string &name) const;
            DrmGpuTopo m_drm_topo;
            // Prefix to use at the start of signal names exported by this SysfsDriver
            // E.g., "DRM" or "ACCEL"
            const std::string M_DRIVER_SIGNAL_PREFIX;
            // Map of signal names to sysfs signal properties
            const std::map<std::string, SysfsDriver::properties_s> M_PROPERTIES;
            // Map of (GEOPM signal domain, GEOPM signal index) pairs to hwmon sysfs directory paths symlinked via drm paths
            const std::map<std::pair<geopm_domain_e, int>, std::string> M_DRM_HWMON_DIR_BY_GEOPM_DOMAIN;
            std::map<std::string, SysfsDriver::derived_signal_info_s> m_power_signal_derivative_map;
    };
}
 
#endif