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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
#include "base/file_descriptor_posix.h"
#include "base/single_thread_task_runner.h"
#include "ui/ozone/platform/drm/gpu/drm_device.h"
#include "ui/ozone/platform/drm/gpu/drm_device_generator.h"
namespace ui {
namespace {
class FindByDevicePath {
public:
explicit FindByDevicePath(const base::FilePath& path) : path_(path) {}
bool operator()(const scoped_refptr<DrmDevice>& device) {
return device->device_path() == path_;
}
private:
base::FilePath path_;
};
} // namespace
DrmDeviceManager::DrmDeviceManager(
scoped_ptr<DrmDeviceGenerator> drm_device_generator)
: drm_device_generator_(drm_device_generator.Pass()) {
}
DrmDeviceManager::~DrmDeviceManager() {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(drm_device_map_.empty());
}
bool DrmDeviceManager::AddDrmDevice(const base::FilePath& path,
const base::FileDescriptor& fd) {
DCHECK(thread_checker_.CalledOnValidThread());
base::File file(fd.fd);
auto it =
std::find_if(devices_.begin(), devices_.end(), FindByDevicePath(path));
if (it != devices_.end()) {
VLOG(2) << "Got request to add existing device: " << path.value();
return false;
}
scoped_refptr<DrmDevice> device =
drm_device_generator_->CreateDevice(path, file.Pass());
if (!device) {
LOG(ERROR) << "Could not initialize DRM device for " << path.value();
return false;
}
if (io_task_runner_)
device->InitializeTaskRunner(io_task_runner_);
if (!primary_device_)
primary_device_ = device;
devices_.push_back(device);
return true;
}
void DrmDeviceManager::RemoveDrmDevice(const base::FilePath& path) {
DCHECK(thread_checker_.CalledOnValidThread());
auto it =
std::find_if(devices_.begin(), devices_.end(), FindByDevicePath(path));
if (it == devices_.end()) {
VLOG(2) << "Got request to remove non-existent device: " << path.value();
return;
}
DCHECK_NE(primary_device_, *it);
devices_.erase(it);
}
void DrmDeviceManager::InitializeIOTaskRunner(
const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!io_task_runner_);
io_task_runner_ = task_runner;
for (const auto& device : devices_)
device->InitializeTaskRunner(io_task_runner_);
}
void DrmDeviceManager::UpdateDrmDevice(gfx::AcceleratedWidget widget,
const scoped_refptr<DrmDevice>& device) {
base::AutoLock lock(lock_);
drm_device_map_[widget] = device;
}
void DrmDeviceManager::RemoveDrmDevice(gfx::AcceleratedWidget widget) {
base::AutoLock lock(lock_);
auto it = drm_device_map_.find(widget);
if (it != drm_device_map_.end())
drm_device_map_.erase(it);
}
scoped_refptr<DrmDevice> DrmDeviceManager::GetDrmDevice(
gfx::AcceleratedWidget widget) {
base::AutoLock lock(lock_);
if (widget == gfx::kNullAcceleratedWidget)
return primary_device_;
auto it = drm_device_map_.find(widget);
DCHECK(it != drm_device_map_.end())
<< "Attempting to get device for unknown widget " << widget;
// If the widget isn't associated with a display (headless mode) we can
// allocate buffers from any controller since they will never be scanned out.
// Use the primary DRM device as a fallback when allocating these buffers.
if (!it->second)
return primary_device_;
return it->second;
}
const DrmDeviceVector& DrmDeviceManager::GetDrmDevices() const {
DCHECK(thread_checker_.CalledOnValidThread());
return devices_;
}
} // namespace ui
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