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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/power_metrics/m1_sensors_mac.h"
#include <CoreFoundation/CoreFoundation.h>
#import <Foundation/Foundation.h>
#import <IOKit/hid/IOHIDDeviceKeys.h>
#import <IOKit/hidsystem/IOHIDServiceClient.h>
#include <utility>
#include "base/apple/bridging.h"
#include "base/apple/foundation_util.h"
#include "base/memory/ptr_util.h"
#include "components/power_metrics/m1_sensors_internal_types_mac.h"
extern "C" {
extern IOHIDEventSystemClientRef IOHIDEventSystemClientCreate(CFAllocatorRef);
extern int IOHIDEventSystemClientSetMatching(IOHIDEventSystemClientRef client,
CFDictionaryRef match);
extern CFTypeRef IOHIDServiceClientCopyEvent(IOHIDServiceClientRef,
int64_t,
int32_t,
int64_t);
extern double IOHIDEventGetFloatValue(CFTypeRef, int32_t);
}
namespace power_metrics {
namespace {
std::optional<double> GetEventFloatValue(IOHIDServiceClientRef service,
int64_t event_type) {
base::apple::ScopedCFTypeRef<CFTypeRef> event(
IOHIDServiceClientCopyEvent(service, event_type, 0, 0));
if (!event)
return std::nullopt;
return IOHIDEventGetFloatValue(event.get(), IOHIDEventFieldBase(event_type));
}
} // namespace
M1SensorsReader::TemperaturesCelsius::TemperaturesCelsius() = default;
M1SensorsReader::TemperaturesCelsius::TemperaturesCelsius(
const TemperaturesCelsius&) noexcept = default;
M1SensorsReader::TemperaturesCelsius::~TemperaturesCelsius() = default;
M1SensorsReader::~M1SensorsReader() = default;
// static
std::unique_ptr<M1SensorsReader> M1SensorsReader::Create() {
base::apple::ScopedCFTypeRef<IOHIDEventSystemClientRef> system(
IOHIDEventSystemClientCreate(kCFAllocatorDefault));
if (!system) {
return nullptr;
}
NSDictionary* filter = @{
@kIOHIDPrimaryUsagePageKey : @(kHIDPage_AppleVendor),
@kIOHIDPrimaryUsageKey : @(kHIDUsage_AppleVendor_TemperatureSensor),
};
IOHIDEventSystemClientSetMatching(system.get(),
base::apple::NSToCFPtrCast(filter));
return base::WrapUnique(new M1SensorsReader(std::move(system)));
}
M1SensorsReader::TemperaturesCelsius M1SensorsReader::ReadTemperatures() {
base::apple::ScopedCFTypeRef<CFArrayRef> services(
IOHIDEventSystemClientCopyServices(system_.get()));
// There are multiple temperature sensors on P-Cores and E-Cores. Count and
// sum values to compute average later.
int num_p_core_temp = 0;
int num_e_core_temp = 0;
double sum_p_core_temp = 0;
double sum_e_core_temp = 0;
for (CFIndex i = 0; i < CFArrayGetCount(services.get()); ++i) {
IOHIDServiceClientRef service =
(IOHIDServiceClientRef)CFArrayGetValueAtIndex(services.get(), i);
base::apple::ScopedCFTypeRef<CFStringRef> product(
base::apple::CFCast<CFStringRef>(
IOHIDServiceClientCopyProperty(service, CFSTR(kIOHIDProductKey))));
if (!product) {
continue;
}
if (CFStringHasPrefix(product.get(), CFSTR("pACC MTR Temp Sensor"))) {
std::optional<double> temp =
GetEventFloatValue(service, kIOHIDEventTypeTemperature);
if (temp.has_value()) {
num_p_core_temp += 1;
sum_p_core_temp += temp.value();
}
}
if (CFStringHasPrefix(product.get(), CFSTR("eACC MTR Temp Sensor"))) {
std::optional<double> temp =
GetEventFloatValue(service, kIOHIDEventTypeTemperature);
if (temp.has_value()) {
num_e_core_temp += 1;
sum_e_core_temp += temp.value();
}
}
}
TemperaturesCelsius temperatures;
if (num_p_core_temp > 0)
temperatures.p_cores = sum_p_core_temp / num_p_core_temp;
if (num_e_core_temp > 0)
temperatures.e_cores = sum_e_core_temp / num_e_core_temp;
return temperatures;
}
M1SensorsReader::M1SensorsReader(
base::apple::ScopedCFTypeRef<IOHIDEventSystemClientRef> system)
: system_(std::move(system)) {}
} // namespace power_metrics
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