NV: Implemented the nvdrv:a service and the /dev/nvmap device.

src/core/hle/service/nvdrv/nvdrv.cpp

+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/nvdrv/nvdrv.h"
+#include "core/hle/service/nvdrv/nvdrv_a.h"
+
+namespace Service {
+namespace NVDRV {
+
+void InstallInterfaces(SM::ServiceManager& service_manager) {
+    std::make_shared<NVDRV_A>()->InstallAsService(service_manager);
+}
+
+} // namespace nvdrv
+} // namespace Service

src/core/hle/service/nvdrv/nvdrv.h

+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+#include "common/common_types.h"
+#include "core/hle/service/service.h"
+
+namespace Service {
+namespace NVDRV {
+
+class nvdevice {
+public:
+    virtual ~nvdevice() = default;
+
+    virtual u32 ioctl(u32 command, const std::vector<u8>& input, std::vector<u8>& output) = 0;
+};
+
+/// Registers all NVDRV services with the specified service manager.
+void InstallInterfaces(SM::ServiceManager& service_manager);
+
+} // namespace NVDRV
+} // namespace Service

src/core/hle/service/nvdrv/nvdrv_a.cpp

+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/service/nvdrv/nvdrv.h"
+#include "core/hle/service/nvdrv/nvdrv_a.h"
+
+namespace Service {
+namespace NVDRV {
+
+class nvhost_as_gpu : public nvdevice {
+public:
+    u32 ioctl(u32 command, const std::vector<u8>& input, std::vector<u8>& output) override {
+        ASSERT(false, "Unimplemented");
+        return 0;
+    }
+};
+
+class nvmap : public nvdevice {
+public:
+    u32 ioctl(u32 command, const std::vector<u8>& input, std::vector<u8>& output) override {
+        switch (command) {
+        case IocCreateCommand:
+            return IocCreate(input, output);
+        case IocAllocCommand:
+            return IocAlloc(input, output);
+        case IocGetIdCommand:
+            return IocGetId(input, output);
+        case IocFromIdCommand:
+            return IocFromId(input, output);
+        case IocParamCommand:
+            return IocParam(input, output);
+        }
+
+        ASSERT(false, "Unimplemented");
+    }
+
+private:
+    // Represents an nvmap object.
+    struct Object {
+        enum class Status { Created, Allocated };
+        u32 id;
+        u32 size;
+        u32 flags;
+        u32 align;
+        u8 kind;
+        u64 addr;
+        Status status;
+    };
+
+    u32 next_handle = 1;
+    u32 next_id = 1;
+    std::unordered_map<u32, std::shared_ptr<Object>> handles;
+
+    enum IoctlCommands {
+        IocCreateCommand = 0xC0080101,
+        IocFromIdCommand = 0xC0080103,
+        IocAllocCommand = 0xC0200104,
+        IocParamCommand = 0xC00C0109,
+        IocGetIdCommand = 0xC008010E
+    };
+
+    struct IocCreateParams {
+        // Input
+        u32_le size;
+        // Output
+        u32_le handle;
+    };
+
+    struct IocAllocParams {
+        // Input
+        u32_le handle;
+        u32_le heap_mask;
+        u32_le flags;
+        u32_le align;
+        u8 kind;
+        INSERT_PADDING_BYTES(7);
+        u64_le addr;
+    };
+
+    struct IocGetIdParams {
+        // Output
+        u32_le id;
+        // Input
+        u32_le handle;
+    };
+
+    struct IocFromIdParams {
+        // Input
+        u32_le id;
+        // Output
+        u32_le handle;
+    };
+
+    struct IocParamParams {
+        // Input
+        u32_le handle;
+        u32_le type;
+        // Output
+        u32_le value;
+    };
+
+    u32 IocCreate(const std::vector<u8>& input, std::vector<u8>& output) {
+        IocCreateParams params;
+        std::memcpy(&params, input.data(), sizeof(params));
+
+        // Create a new nvmap object and obtain a handle to it.
+        auto object = std::make_shared<Object>();
+        object->id = next_id++;
+        object->size = params.size;
+        object->status = Object::Status::Created;
+
+        u32 handle = next_handle++;
+        handles[handle] = std::move(object);
+
+        LOG_WARNING(Service, "(STUBBED) size 0x%08X", params.size);
+
+        params.handle = handle;
+
+        std::memcpy(output.data(), &params, sizeof(params));
+        return 0;
+    }
+
+    u32 IocAlloc(const std::vector<u8>& input, std::vector<u8>& output) {
+        IocAllocParams params;
+        std::memcpy(&params, input.data(), sizeof(params));
+
+        auto itr = handles.find(params.handle);
+        ASSERT(itr != handles.end());
+
+        auto object = itr->second;
+        object->flags = params.flags;
+        object->align = params.align;
+        object->kind = params.kind;
+        object->addr = params.addr;
+        object->status = Object::Status::Allocated;
+
+        LOG_WARNING(Service, "(STUBBED) Allocated address 0x%llx", params.addr);
+
+        std::memcpy(output.data(), &params, sizeof(params));
+        return 0;
+    }
+
+    u32 IocGetId(const std::vector<u8>& input, std::vector<u8>& output) {
+        IocGetIdParams params;
+        std::memcpy(&params, input.data(), sizeof(params));
+
+        LOG_WARNING(Service, "called");
+
+        auto itr = handles.find(params.handle);
+        ASSERT(itr != handles.end());
+
+        params.id = itr->second->id;
+
+        std::memcpy(output.data(), &params, sizeof(params));
+        return 0;
+    }
+
+    u32 IocFromId(const std::vector<u8>& input, std::vector<u8>& output) {
+        IocFromIdParams params;
+        std::memcpy(&params, input.data(), sizeof(params));
+
+        LOG_WARNING(Service, "(STUBBED) called");
+
+        auto itr = std::find_if(handles.begin(), handles.end(),
+                                [&](const auto& entry) { return entry.second->id == params.id; });
+        ASSERT(itr != handles.end());
+
+        // Make a new handle for the object
+        u32 handle = next_handle++;
+        handles[handle] = itr->second;
+
+        params.handle = handle;
+
+        std::memcpy(output.data(), &params, sizeof(params));
+        return 0;
+    }
+
+    u32 IocParam(const std::vector<u8>& input, std::vector<u8>& output) {
+        enum class ParamTypes { Size = 1, Alignment = 2, Base = 3, Heap = 4, Kind = 5, Compr = 6 };
+
+        IocParamParams params;
+        std::memcpy(&params, input.data(), sizeof(params));
+
+        LOG_WARNING(Service, "(STUBBED) called type=%u", params.type);
+
+        auto itr = handles.find(params.handle);
+        ASSERT(itr != handles.end());
+
+        auto object = itr->second;
+        ASSERT(object->status == Object::Status::Allocated);
+
+        switch (static_cast<ParamTypes>(params.type)) {
+        case ParamTypes::Size:
+            params.value = object->size;
+            break;
+        case ParamTypes::Alignment:
+            params.value = object->align;
+            break;
+        case ParamTypes::Heap:
+            // TODO(Subv): Seems to be a hardcoded value?
+            params.value = 0x40000000;
+            break;
+        case ParamTypes::Kind:
+            params.value = object->kind;
+            break;
+        default:
+            ASSERT(false, "Unimplemented");
+        }
+
+        std::memcpy(output.data(), &params, sizeof(params));
+        return 0;
+    }
+};
+
+void NVDRV_A::Open(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service, "(STUBBED) called");
+
+    auto buffer = ctx.BufferDescriptorA()[0];
+
+    std::string device_name = Memory::ReadCString(buffer.Address(), buffer.Size());
+
+    auto device = devices[device_name];
+    u32 fd = next_fd++;
+
+    open_files[fd] = device;
+
+    IPC::RequestBuilder rb{ctx, 4};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(fd);
+    rb.Push<u32>(0);
+}
+
+void NVDRV_A::Ioctl(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service, "(STUBBED) called");
+
+    IPC::RequestParser rp{ctx};
+    u32 fd = rp.Pop<u32>();
+    u32 command = rp.Pop<u32>();
+
+    auto input_buffer = ctx.BufferDescriptorA()[0];
+    auto output_buffer = ctx.BufferDescriptorB()[0];
+
+    std::vector<u8> input(input_buffer.Size());
+    std::vector<u8> output(output_buffer.Size());
+
+    Memory::ReadBlock(input_buffer.Address(), input.data(), input_buffer.Size());
+    auto itr = open_files.find(fd);
+    ASSERT_MSG(itr != open_files.end(), "Tried to talk to an invalid device");
+
+    auto device = itr->second;
+    u32 nv_result = device->ioctl(command, input, output);
+
+    Memory::WriteBlock(output_buffer.Address(), output.data(), output_buffer.Size());
+
+    IPC::RequestBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push(nv_result);
+}
+
+void NVDRV_A::Initialize(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service, "(STUBBED) called");
+    IPC::RequestBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(0);
+}
+
+NVDRV_A::NVDRV_A() : ServiceFramework("nvdrv:a") {
+    static const FunctionInfo functions[] = {
+        {0, &NVDRV_A::Open, "Open"},
+        {1, &NVDRV_A::Ioctl, "Ioctl"},
+        {3, &NVDRV_A::Initialize, "Initialize"},
+    };
+    RegisterHandlers(functions);
+
+    devices["/dev/nvhost-as-gpu"] = std::make_shared<nvhost_as_gpu>();
+    devices["/dev/nvmap"] = std::make_shared<nvmap>();
+}
+
+} // namespace NVDRV
+} // namespace Service

src/core/hle/service/nvdrv/nvdrv_a.h

+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+#include <memory>
+
+namespace Service {
+namespace NVDRV {
+
+class NVDRV_A final : public ServiceFramework<NVDRV_A> {
+public:
+    NVDRV_A();
+    ~NVDRV_A() = default;
+
+private:
+    void Open(Kernel::HLERequestContext& ctx);
+    void Ioctl(Kernel::HLERequestContext& ctx);
+    void Initialize(Kernel::HLERequestContext& ctx);
+
+    u32 next_fd = 1;
+
+    std::unordered_map<u32, std::shared_ptr<nvdevice>> open_files;
+    std::unordered_map<std::string, std::shared_ptr<nvdevice>> devices;
+};
+
+} // namespace NVDRV
+} // namespace Service