| // Copyright 2019 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SRC_DAWN_NATIVE_VULKAN_BACKENDVK_H_ |
| #define SRC_DAWN_NATIVE_VULKAN_BACKENDVK_H_ |
| |
| #include <mutex> |
| #include <string> |
| #include <unordered_map> |
| #include <vector> |
| |
| #include "dawn/native/BackendConnection.h" |
| |
| #include "dawn/common/DynamicLib.h" |
| #include "dawn/common/RefCounted.h" |
| #include "dawn/common/ityp_array.h" |
| #include "dawn/native/vulkan/VulkanFunctions.h" |
| #include "dawn/native/vulkan/VulkanInfo.h" |
| |
| namespace dawn::native::vulkan { |
| |
| enum class ICD { |
| None, |
| SwiftShader, |
| }; |
| |
| class Device; |
| |
| // VulkanInstance holds the reference to the Vulkan library, the VkInstance, VkPhysicalDevices |
| // on that instance, Vulkan functions loaded from the library, and global information |
| // gathered from the instance. VkPhysicalDevices bound to the VkInstance are bound to the GPU |
| // and GPU driver, keeping them active. It is RefCounted so that (eventually) when all adapters |
| // on an instance are no longer in use, the instance is deleted. This can be particuarly useful |
| // when we create multiple instances to selectively discover ICDs (like only |
| // SwiftShader/iGPU/dGPU/eGPU), and only one physical device on one instance remains in use. We |
| // can delete the VkInstances that are not in use to avoid holding the discrete GPU active. |
| class VulkanInstance : public RefCounted { |
| public: |
| static ResultOrError<Ref<VulkanInstance>> Create(const InstanceBase* instance, ICD icd); |
| ~VulkanInstance() override; |
| |
| const VulkanFunctions& GetFunctions() const; |
| VkInstance GetVkInstance() const; |
| const VulkanGlobalInfo& GetGlobalInfo() const; |
| const std::vector<VkPhysicalDevice>& GetVkPhysicalDevices() const; |
| |
| // TODO(dawn:831): This set of functions guards may need to be adjusted when Dawn is updated |
| // to support multithreading. |
| void StartListeningForDeviceMessages(Device* device); |
| void StopListeningForDeviceMessages(Device* device); |
| bool HandleDeviceMessage(std::string deviceDebugPrefix, std::string message); |
| |
| private: |
| VulkanInstance(); |
| |
| MaybeError Initialize(const InstanceBase* instance, ICD icd); |
| ResultOrError<VulkanGlobalKnobs> CreateVkInstance(const InstanceBase* instance); |
| |
| MaybeError RegisterDebugUtils(); |
| |
| DynamicLib mVulkanLib; |
| VulkanGlobalInfo mGlobalInfo = {}; |
| VkInstance mInstance = VK_NULL_HANDLE; |
| VulkanFunctions mFunctions; |
| |
| VkDebugUtilsMessengerEXT mDebugUtilsMessenger = VK_NULL_HANDLE; |
| |
| std::vector<VkPhysicalDevice> mVkPhysicalDevices; |
| |
| // Devices keep the VulkanInstance alive, so as long as devices remove themselves from this |
| // map on destruction the pointers it contains should remain valid. |
| std::unordered_map<std::string, Device*> mMessageListenerDevices; |
| std::mutex mMessageListenerDevicesMutex; |
| }; |
| |
| class Backend : public BackendConnection { |
| public: |
| explicit Backend(InstanceBase* instance); |
| ~Backend() override; |
| |
| MaybeError Initialize(); |
| |
| std::vector<Ref<PhysicalDeviceBase>> DiscoverDefaultPhysicalDevices() override; |
| ResultOrError<std::vector<Ref<PhysicalDeviceBase>>> DiscoverPhysicalDevices( |
| const PhysicalDeviceDiscoveryOptionsBase* optionsBase) override; |
| |
| private: |
| ityp::array<ICD, Ref<VulkanInstance>, 2> mVulkanInstances = {}; |
| }; |
| |
| } // namespace dawn::native::vulkan |
| |
| #endif // SRC_DAWN_NATIVE_VULKAN_BACKENDVK_H_ |