graphics: add a default implementation to IAllocator

The default implementatoin is built on top of conventional gralloc1.

This also adds a static library, libgralloc1-adapter.  It is intended to
ease the porting of gralloc0 to gralloc1.

Test: booted to launcher, tested with YouTube and some games.

Change-Id: Id640b1d5a1e1eea1aafabb6c134e6be6e71afff5

Android.bp

@@ -4,6 +4,7 @@ subdirs = [
     "audio/effect/2.0",
     "benchmarks/msgq/1.0",
     "graphics/allocator/2.0",
+    "graphics/allocator/2.0/default",
     "memtrack/1.0",
     "memtrack/1.0/default",
     "nfc/1.0",

graphics/allocator/2.0/default/Android.bp

@@ -0,0 +1,24 @@
+cc_library_shared {
+    name: "android.hardware.graphics.allocator@2.0-impl",
+    relative_install_path: "hw",
+    srcs: ["Gralloc.cpp"],
+    cppflags: ["-Wall", "-Wextra"],
+    shared_libs: [
+        "android.hardware.graphics.allocator@2.0",
+        "libbase",
+        "libcutils",
+        "libhardware",
+        "libhidl",
+        "libhwbinder",
+        "liblog",
+        "libutils",
+    ],
+}
+
+cc_library_static {
+    name: "libgralloc1-adapter",
+    srcs: ["gralloc1-adapter.c"],
+    include_dirs: ["system/core/libsync/include"],
+    cflags: ["-Wall", "-Wextra", "-Wno-unused-parameter"],
+    export_include_dirs: ["."],
+}

graphics/allocator/2.0/default/Gralloc.cpp

@@ -0,0 +1,297 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#define LOG_TAG "GrallocPassthrough"
+
+#include <type_traits>
+#include <unordered_set>
+#include <vector>
+
+#include <string.h>
+
+#include <hardware/gralloc1.h>
+#include <log/log.h>
+
+#include "Gralloc.h"
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace allocator {
+namespace V2_0 {
+namespace implementation {
+
+class GrallocHal : public IAllocator {
+public:
+    GrallocHal(const hw_module_t* module);
+    virtual ~GrallocHal();
+
+    // IAllocator interface
+    Return<void> getCapabilities(getCapabilities_cb hidl_cb) override;
+    Return<void> dumpDebugInfo(dumpDebugInfo_cb hidl_cb) override;
+    Return<void> createDescriptor(const BufferDescriptorInfo& descriptorInfo,
+            createDescriptor_cb hidl_cb) override;
+    Return<Error> destroyDescriptor(BufferDescriptor descriptor) override;
+
+    Return<Error> testAllocate(
+            const hidl_vec<BufferDescriptor>& descriptors) override;
+    Return<void> allocate(const hidl_vec<BufferDescriptor>& descriptors,
+            allocate_cb hidl_cb) override;
+    Return<Error> free(Buffer buffer) override;
+
+    Return<void> exportHandle(BufferDescriptor descriptor,
+            Buffer buffer, exportHandle_cb hidl_cb) override;
+
+private:
+    void initCapabilities();
+
+    template<typename T>
+    void initDispatch(T& func, gralloc1_function_descriptor_t desc);
+    void initDispatch();
+
+    bool hasCapability(Capability capability) const;
+
+    gralloc1_device_t* mDevice;
+
+    std::unordered_set<Capability> mCapabilities;
+
+    struct {
+        GRALLOC1_PFN_DUMP dump;
+        GRALLOC1_PFN_CREATE_DESCRIPTOR createDescriptor;
+        GRALLOC1_PFN_DESTROY_DESCRIPTOR destroyDescriptor;
+        GRALLOC1_PFN_SET_DIMENSIONS setDimensions;
+        GRALLOC1_PFN_SET_FORMAT setFormat;
+        GRALLOC1_PFN_SET_CONSUMER_USAGE setConsumerUsage;
+        GRALLOC1_PFN_SET_PRODUCER_USAGE setProducerUsage;
+        GRALLOC1_PFN_ALLOCATE allocate;
+        GRALLOC1_PFN_RELEASE release;
+        GRALLOC1_PFN_GET_BACKING_STORE getBackingStore;
+        GRALLOC1_PFN_GET_STRIDE getStride;
+        GRALLOC1_PFN_GET_NUM_FLEX_PLANES getNumFlexPlanes;
+    } mDispatch;
+};
+
+GrallocHal::GrallocHal(const hw_module_t* module)
+    : mDevice(nullptr), mDispatch()
+{
+    int status = gralloc1_open(module, &mDevice);
+    if (status) {
+        LOG_ALWAYS_FATAL("failed to open gralloc1 device: %s",
+                strerror(-status));
+    }
+
+    initCapabilities();
+    initDispatch();
+}
+
+GrallocHal::~GrallocHal()
+{
+    gralloc1_close(mDevice);
+}
+
+void GrallocHal::initCapabilities()
+{
+    uint32_t count;
+    mDevice->getCapabilities(mDevice, &count, nullptr);
+
+    std::vector<Capability> caps(count);
+    mDevice->getCapabilities(mDevice, &count, reinterpret_cast<
+              std::underlying_type<Capability>::type*>(caps.data()));
+    caps.resize(count);
+
+    mCapabilities.insert(caps.cbegin(), caps.cend());
+}
+
+template<typename T>
+void GrallocHal::initDispatch(T& func, gralloc1_function_descriptor_t desc)
+{
+    auto pfn = mDevice->getFunction(mDevice, desc);
+    if (!pfn) {
+        LOG_ALWAYS_FATAL("failed to get gralloc1 function %d", desc);
+    }
+
+    func = reinterpret_cast<T>(pfn);
+}
+
+void GrallocHal::initDispatch()
+{
+    initDispatch(mDispatch.dump, GRALLOC1_FUNCTION_DUMP);
+    initDispatch(mDispatch.createDescriptor,
+            GRALLOC1_FUNCTION_CREATE_DESCRIPTOR);
+    initDispatch(mDispatch.destroyDescriptor,
+            GRALLOC1_FUNCTION_DESTROY_DESCRIPTOR);
+    initDispatch(mDispatch.setDimensions, GRALLOC1_FUNCTION_SET_DIMENSIONS);
+    initDispatch(mDispatch.setFormat, GRALLOC1_FUNCTION_SET_FORMAT);
+    initDispatch(mDispatch.setConsumerUsage,
+            GRALLOC1_FUNCTION_SET_CONSUMER_USAGE);
+    initDispatch(mDispatch.setProducerUsage,
+            GRALLOC1_FUNCTION_SET_PRODUCER_USAGE);
+    initDispatch(mDispatch.allocate, GRALLOC1_FUNCTION_ALLOCATE);
+    initDispatch(mDispatch.release, GRALLOC1_FUNCTION_RELEASE);
+}
+
+bool GrallocHal::hasCapability(Capability capability) const
+{
+    return (mCapabilities.count(capability) > 0);
+}
+
+Return<void> GrallocHal::getCapabilities(getCapabilities_cb hidl_cb)
+{
+    std::vector<Capability> caps(
+            mCapabilities.cbegin(), mCapabilities.cend());
+
+    hidl_vec<Capability> reply;
+    reply.setToExternal(caps.data(), caps.size());
+    hidl_cb(reply);
+
+    return Void();
+}
+
+Return<void> GrallocHal::dumpDebugInfo(dumpDebugInfo_cb hidl_cb)
+{
+    uint32_t len = 0;
+    mDispatch.dump(mDevice, &len, nullptr);
+
+    std::vector<char> buf(len + 1);
+    mDispatch.dump(mDevice, &len, buf.data());
+    buf.resize(len + 1);
+    buf[len] = '\0';
+
+    hidl_string reply;
+    reply.setToExternal(buf.data(), len);
+    hidl_cb(reply);
+
+    return Void();
+}
+
+Return<void> GrallocHal::createDescriptor(
+        const BufferDescriptorInfo& descriptorInfo,
+        createDescriptor_cb hidl_cb)
+{
+    BufferDescriptor descriptor;
+    int32_t err = mDispatch.createDescriptor(mDevice, &descriptor);
+    if (err == GRALLOC1_ERROR_NONE) {
+        err = mDispatch.setDimensions(mDevice, descriptor,
+                descriptorInfo.width, descriptorInfo.height);
+    }
+    if (err == GRALLOC1_ERROR_NONE) {
+        err = mDispatch.setFormat(mDevice, descriptor,
+                static_cast<int32_t>(descriptorInfo.format));
+    }
+    if (err == GRALLOC1_ERROR_NONE) {
+        uint64_t producerUsageMask = descriptorInfo.producerUsageMask;
+        if (producerUsageMask & GRALLOC1_PRODUCER_USAGE_CPU_READ_OFTEN) {
+            producerUsageMask |= GRALLOC1_PRODUCER_USAGE_CPU_READ;
+        }
+        if (producerUsageMask & GRALLOC1_PRODUCER_USAGE_CPU_WRITE_OFTEN) {
+            producerUsageMask |= GRALLOC1_PRODUCER_USAGE_CPU_WRITE;
+        }
+        err = mDispatch.setProducerUsage(mDevice, descriptor,
+                descriptorInfo.producerUsageMask);
+    }
+    if (err == GRALLOC1_ERROR_NONE) {
+        uint64_t consumerUsageMask = descriptorInfo.consumerUsageMask;
+        if (consumerUsageMask & GRALLOC1_CONSUMER_USAGE_CPU_READ_OFTEN) {
+            consumerUsageMask |= GRALLOC1_CONSUMER_USAGE_CPU_READ;
+        }
+        err = mDispatch.setConsumerUsage(mDevice, descriptor,
+                consumerUsageMask);
+    }
+
+    hidl_cb(static_cast<Error>(err), descriptor);
+
+    return Void();
+}
+
+Return<Error> GrallocHal::destroyDescriptor(
+        BufferDescriptor descriptor)
+{
+    int32_t err = mDispatch.destroyDescriptor(mDevice, descriptor);
+    return static_cast<Error>(err);
+}
+
+Return<Error> GrallocHal::testAllocate(
+        const hidl_vec<BufferDescriptor>& descriptors)
+{
+    if (!hasCapability(Capability::TEST_ALLOCATE)) {
+        return Error::UNDEFINED;
+    }
+
+    int32_t err = mDispatch.allocate(mDevice, descriptors.size(),
+            &descriptors[0], nullptr);
+    return static_cast<Error>(err);
+}
+
+Return<void> GrallocHal::allocate(
+        const hidl_vec<BufferDescriptor>& descriptors,
+        allocate_cb hidl_cb) {
+    std::vector<buffer_handle_t> buffers(descriptors.size());
+    int32_t err = mDispatch.allocate(mDevice, descriptors.size(),
+            &descriptors[0], buffers.data());
+    if (err != GRALLOC1_ERROR_NONE && err != GRALLOC1_ERROR_NOT_SHARED) {
+        buffers.clear();
+    }
+
+    hidl_vec<Buffer> reply;
+    reply.setToExternal(
+            reinterpret_cast<Buffer*>(buffers.data()),
+            buffers.size());
+    hidl_cb(static_cast<Error>(err), reply);
+
+    return Void();
+}
+
+Return<Error> GrallocHal::free(Buffer buffer)
+{
+    buffer_handle_t handle = reinterpret_cast<buffer_handle_t>(buffer);
+    int32_t err = mDispatch.release(mDevice, handle);
+    return static_cast<Error>(err);
+}
+
+Return<void> GrallocHal::exportHandle(BufferDescriptor /*descriptor*/,
+        Buffer buffer, exportHandle_cb hidl_cb)
+{
+    // do we want to validate?
+    buffer_handle_t handle = reinterpret_cast<buffer_handle_t>(buffer);
+
+    hidl_cb(Error::NONE, handle);
+
+    return Void();
+}
+
+IAllocator* HIDL_FETCH_IAllocator(const char* /* name */) {
+    const hw_module_t* module;
+    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
+    if (err) {
+        ALOGE("failed to get gralloc module");
+        return nullptr;
+    }
+
+    uint8_t major = (module->module_api_version >> 8) & 0xff;
+    if (major != 1) {
+        ALOGE("unknown gralloc module major version %d", major);
+        return nullptr;
+    }
+
+    return new GrallocHal(module);
+}
+
+} // namespace implementation
+} // namespace V2_0
+} // namespace allocator
+} // namespace graphics
+} // namespace hardware
+} // namespace android

graphics/allocator/2.0/default/Gralloc.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * 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 ANDROID_HARDWARE_GRAPHICS_ALLOCATOR_V2_0_GRALLOC_H
+#define ANDROID_HARDWARE_GRAPHICS_ALLOCATOR_V2_0_GRALLOC_H
+
+#include <android/hardware/graphics/allocator/2.0/IAllocator.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace allocator {
+namespace V2_0 {
+namespace implementation {
+
+extern "C" IAllocator* HIDL_FETCH_IAllocator(const char* name);
+
+} // namespace implementation
+} // namespace V2_0
+} // namespace allocator
+} // namespace graphics
+} // namespace hardware
+} // namespace android
+
+#endif // ANDROID_HARDWARE_GRAPHICS_ALLOCATOR_V2_0_GRALLOC_H

graphics/allocator/2.0/default/gralloc1-adapter.c

@@ -0,0 +1,660 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#define LOG_TAG "Gralloc1Adapter"
+
+#include <stdatomic.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <pthread.h>
+
+#include <cutils/native_handle.h>
+#include <hardware/gralloc1.h>
+#include <sync/sync.h>
+#include <log/log.h>
+
+#include "gralloc1-adapter.h"
+
+struct gralloc1_adapter_module {
+    struct gralloc_module_t base;
+    struct gralloc1_adapter adapter;
+};
+
+struct gralloc1_adapter_device {
+    struct gralloc1_device base;
+
+    struct alloc_device_t* alloc_dev;
+
+    /* fixed size for thread safety */
+    char saved_dump[4096];
+    size_t saved_dump_size;
+};
+
+/* additional data associated with registered buffer_handle_t */
+struct gralloc1_adapter_buffer_data {
+    struct gralloc1_adapter_buffer_info info;
+
+    atomic_int refcount;
+    bool owned;
+};
+
+struct gralloc1_adapter_buffer_descriptor {
+    int width;
+    int height;
+    int format;
+    int producer_usage;
+    int consumer_usage;
+};
+
+static const struct gralloc1_adapter_module* gralloc1_adapter_module(
+        struct gralloc1_device* dev)
+{
+    return (const struct gralloc1_adapter_module*) dev->common.module;
+}
+
+static struct gralloc1_adapter_device* gralloc1_adapter_device(
+        struct gralloc1_device* dev)
+{
+    return (struct gralloc1_adapter_device*) dev;
+}
+
+static struct gralloc1_adapter_buffer_data* lookup_buffer_data(
+        struct gralloc1_device* dev, buffer_handle_t buffer)
+{
+    const struct gralloc1_adapter_module* mod = gralloc1_adapter_module(dev);
+    if (!mod->adapter.is_registered(&mod->base, buffer))
+        return NULL;
+
+    return mod->adapter.get_data(&mod->base, buffer);
+}
+
+static struct gralloc1_adapter_buffer_descriptor* lookup_buffer_descriptor(
+        struct gralloc1_device* dev, gralloc1_buffer_descriptor_t id)
+{
+    /* do we want to validate? */
+    return (struct gralloc1_adapter_buffer_descriptor*) ((uintptr_t) id);
+}
+
+static void device_dump(struct gralloc1_device* device,
+        uint32_t* outSize, char* outBuffer)
+{
+    struct gralloc1_adapter_device* dev = gralloc1_adapter_device(device);
+
+    if (outBuffer) {
+        uint32_t copy = (uint32_t) dev->saved_dump_size;
+        if (*outSize < copy) {
+            copy = *outSize;
+        } else {
+            *outSize = copy;
+        }
+
+        memcpy(outBuffer, dev->saved_dump, copy);
+    } else {
+        /* dump is optional and may not null-terminate */
+        if (dev->alloc_dev->dump) {
+            dev->alloc_dev->dump(dev->alloc_dev, dev->saved_dump,
+                    sizeof(dev->saved_dump) - 1);
+            dev->saved_dump_size = strlen(dev->saved_dump);
+        }
+
+        *outSize = (uint32_t) dev->saved_dump_size;
+    }
+}
+
+static int32_t device_create_descriptor(struct gralloc1_device* device,
+        gralloc1_buffer_descriptor_t* outDescriptor)
+{
+    struct gralloc1_adapter_buffer_descriptor* desc;
+
+    desc = calloc(1, sizeof(*desc));
+    if (!desc) {
+        return GRALLOC1_ERROR_NO_RESOURCES;
+    }
+
+    *outDescriptor = (gralloc1_buffer_descriptor_t) (uintptr_t) desc;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_destroy_descriptor(struct gralloc1_device* device,
+        gralloc1_buffer_descriptor_t descriptor)
+{
+    struct gralloc1_adapter_buffer_descriptor* desc =
+        lookup_buffer_descriptor(device, descriptor);
+    if (!desc) {
+        return GRALLOC1_ERROR_BAD_DESCRIPTOR;
+    }
+
+    free(desc);
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_set_consumer_usage(struct gralloc1_device* device,
+        gralloc1_buffer_descriptor_t descriptor, uint64_t usage)
+{
+    struct gralloc1_adapter_buffer_descriptor* desc =
+        lookup_buffer_descriptor(device, descriptor);
+    if (!desc) {
+        return GRALLOC1_ERROR_BAD_DESCRIPTOR;
+    }
+
+    desc->consumer_usage = (int) usage;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_set_dimensions(struct gralloc1_device* device,
+        gralloc1_buffer_descriptor_t descriptor,
+        uint32_t width, uint32_t height)
+{
+    struct gralloc1_adapter_buffer_descriptor* desc =
+        lookup_buffer_descriptor(device, descriptor);
+    if (!desc) {
+        return GRALLOC1_ERROR_BAD_DESCRIPTOR;
+    }
+
+    desc->width = (int) width;
+    desc->height = (int) height;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_set_format(struct gralloc1_device* device,
+        gralloc1_buffer_descriptor_t descriptor, int32_t format)
+{
+    struct gralloc1_adapter_buffer_descriptor* desc =
+        lookup_buffer_descriptor(device, descriptor);
+    if (!desc) {
+        return GRALLOC1_ERROR_BAD_DESCRIPTOR;
+    }
+
+    desc->format = format;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_set_producer_usage(struct gralloc1_device* device,
+        gralloc1_buffer_descriptor_t descriptor, uint64_t usage)
+{
+    struct gralloc1_adapter_buffer_descriptor* desc =
+        lookup_buffer_descriptor(device, descriptor);
+    if (!desc) {
+        return GRALLOC1_ERROR_BAD_DESCRIPTOR;
+    }
+
+    desc->producer_usage = (int) usage;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_get_backing_store(struct gralloc1_device* device,
+        buffer_handle_t buffer, gralloc1_backing_store_t* outStore)
+{
+    /* we never share backing store */
+    *outStore = (gralloc1_backing_store_t) (uintptr_t) buffer;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_get_consumer_usage(struct gralloc1_device* device,
+        buffer_handle_t buffer, uint64_t* outUsage)
+{
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    if (!data) {
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    *outUsage = data->info.usage;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_get_dimensions(struct gralloc1_device* device,
+        buffer_handle_t buffer, uint32_t* outWidth, uint32_t* outHeight)
+{
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    if (!data) {
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    *outWidth = data->info.width;
+    *outHeight = data->info.height;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_get_format(struct gralloc1_device* device,
+        buffer_handle_t buffer, int32_t* outFormat)
+{
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    if (!data) {
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    *outFormat = data->info.format;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_get_producer_usage(struct gralloc1_device* device,
+        buffer_handle_t buffer, uint64_t* outUsage)
+{
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    if (!data) {
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    *outUsage = data->info.usage;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_get_stride(struct gralloc1_device* device,
+        buffer_handle_t buffer, uint32_t* outStride)
+{
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    if (!data) {
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    *outStride = data->info.stride;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_allocate(struct gralloc1_device* device,
+        uint32_t numDescriptors,
+        const gralloc1_buffer_descriptor_t* descriptors,
+        buffer_handle_t* outBuffers)
+{
+    const struct gralloc1_adapter_module* mod =
+        gralloc1_adapter_module(device);
+    struct gralloc1_adapter_device* dev = gralloc1_adapter_device(device);
+    gralloc1_error_t err = GRALLOC1_ERROR_NONE;
+    uint32_t i;
+
+    for (i = 0; i < numDescriptors; i++) {
+        const struct gralloc1_adapter_buffer_descriptor* desc =
+            lookup_buffer_descriptor(device, descriptors[i]);
+        struct gralloc1_adapter_buffer_data* data;
+        buffer_handle_t buffer;
+        int dummy_stride;
+        int ret;
+
+        if (!desc) {
+            err = GRALLOC1_ERROR_BAD_DESCRIPTOR;
+            break;
+        }
+
+        data = calloc(1, sizeof(*data));
+        if (!data) {
+            err = GRALLOC1_ERROR_NO_RESOURCES;
+            break;
+        }
+
+        ret = dev->alloc_dev->alloc(dev->alloc_dev, desc->width, desc->height,
+                desc->format, desc->producer_usage | desc->consumer_usage,
+                &buffer, &dummy_stride);
+        if (ret) {
+            free(data);
+            err = GRALLOC1_ERROR_NO_RESOURCES;
+            break;
+        }
+
+        mod->adapter.get_info(&mod->base, buffer, &data->info);
+        data->refcount = 1;
+        data->owned = true;
+
+        mod->adapter.set_data(&mod->base, buffer, data);
+
+        outBuffers[i] = buffer;
+    }
+
+    if (err != GRALLOC1_ERROR_NONE) {
+        uint32_t j;
+        for (j = 0; j < i; j++) {
+            free(mod->adapter.get_data(&mod->base, outBuffers[i]));
+            dev->alloc_dev->free(dev->alloc_dev, outBuffers[i]);
+        }
+
+        return err;
+    }
+
+    return (numDescriptors > 1) ?
+        GRALLOC1_ERROR_NOT_SHARED : GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_retain(struct gralloc1_device* device,
+        buffer_handle_t buffer)
+{
+    static pthread_mutex_t register_mutex = PTHREAD_MUTEX_INITIALIZER;
+    const struct gralloc1_adapter_module* mod =
+        gralloc1_adapter_module(device);
+    struct gralloc1_adapter_buffer_data* data;
+
+    pthread_mutex_lock(&register_mutex);
+
+    if (mod->adapter.is_registered(&mod->base, buffer)) {
+        data = mod->adapter.get_data(&mod->base, buffer);
+        data->refcount++;
+    } else {
+        int ret;
+
+        data = calloc(1, sizeof(*data));
+        if (!data) {
+            pthread_mutex_unlock(&register_mutex);
+            return GRALLOC1_ERROR_NO_RESOURCES;
+        }
+
+        ret = mod->base.registerBuffer(&mod->base, buffer);
+        if (ret) {
+            pthread_mutex_unlock(&register_mutex);
+            free(data);
+
+            return GRALLOC1_ERROR_NO_RESOURCES;
+        }
+
+        mod->adapter.get_info(&mod->base, buffer, &data->info);
+        data->refcount = 1;
+        data->owned = false;
+
+        mod->adapter.set_data(&mod->base, buffer, data);
+    }
+
+    pthread_mutex_unlock(&register_mutex);
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_release(struct gralloc1_device* device,
+        buffer_handle_t buffer)
+{
+    struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    if (!data) {
+        ALOGE("unable to release unregistered buffer %p", buffer);
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    data->refcount--;
+    if (!data->refcount) {
+        if (data->owned) {
+            struct gralloc1_adapter_device* dev =
+                gralloc1_adapter_device(device);
+            dev->alloc_dev->free(dev->alloc_dev, buffer);
+        } else {
+            const struct gralloc1_adapter_module* mod =
+                gralloc1_adapter_module(device);
+            mod->base.unregisterBuffer(&mod->base, buffer);
+
+            native_handle_close(buffer);
+            native_handle_delete((native_handle_t*) buffer);
+        }
+
+        free(data);
+    }
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_get_num_flex_planes(struct gralloc1_device* device,
+        buffer_handle_t buffer, uint32_t* outNumPlanes)
+{
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    if (!data) {
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    *outNumPlanes = data->info.num_flex_planes;
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_lock(struct gralloc1_device* device,
+        buffer_handle_t buffer,
+        uint64_t producerUsage, uint64_t consumerUsage,
+        const gralloc1_rect_t* accessRegion, void** outData,
+        int32_t acquireFence)
+{
+    const struct gralloc1_adapter_module* mod =
+        gralloc1_adapter_module(device);
+    const int usage = (int) (producerUsage | consumerUsage);
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    int ret;
+
+    if (!data) {
+        ALOGE("unable to lock unregistered buffer %p", buffer);
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    if (mod->adapter.real_module_api_version >=
+            GRALLOC_MODULE_API_VERSION_0_3) {
+        ret = mod->base.lockAsync(&mod->base,
+                buffer, usage,
+                accessRegion->left,
+                accessRegion->top,
+                accessRegion->width,
+                accessRegion->height,
+                outData, acquireFence);
+    } else {
+        if (acquireFence >= 0) {
+            sync_wait(acquireFence, -1);
+        }
+
+        ret = mod->base.lock(&mod->base,
+                buffer, usage,
+                accessRegion->left,
+                accessRegion->top,
+                accessRegion->width,
+                accessRegion->height,
+                outData);
+
+        if (acquireFence >= 0 && !ret) {
+            close(acquireFence);
+        }
+    }
+
+    return (ret) ? GRALLOC1_ERROR_NO_RESOURCES : GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_lock_flex(struct gralloc1_device* device,
+        buffer_handle_t buffer,
+        uint64_t producerUsage, uint64_t consumerUsage,
+        const gralloc1_rect_t* accessRegion,
+        struct android_flex_layout* outFlexLayout,
+        int32_t acquireFence)
+{
+    const struct gralloc1_adapter_module* mod =
+        gralloc1_adapter_module(device);
+    const int usage = (int) (producerUsage | consumerUsage);
+    const struct gralloc1_adapter_buffer_data* data =
+        lookup_buffer_data(device, buffer);
+    struct android_ycbcr ycbcr;
+    int ret;
+
+    if (!data) {
+        ALOGE("unable to lockFlex unregistered buffer %p", buffer);
+        return GRALLOC1_ERROR_BAD_HANDLE;
+    }
+
+    if (outFlexLayout->num_planes < data->info.num_flex_planes) {
+        return GRALLOC1_ERROR_BAD_VALUE;
+    }
+
+    if (mod->adapter.real_module_api_version >=
+            GRALLOC_MODULE_API_VERSION_0_3 && mod->base.lockAsync_ycbcr) {
+        ret = mod->base.lockAsync_ycbcr(&mod->base,
+                buffer, usage,
+                accessRegion->left,
+                accessRegion->top,
+                accessRegion->width,
+                accessRegion->height,
+                &ycbcr, acquireFence);
+    } else if (mod->base.lock_ycbcr) {
+        if (acquireFence >= 0) {
+            sync_wait(acquireFence, -1);
+        }
+
+        ret = mod->base.lock_ycbcr(&mod->base,
+                buffer, usage,
+                accessRegion->left,
+                accessRegion->top,
+                accessRegion->width,
+                accessRegion->height,
+                &ycbcr);
+
+        if (acquireFence >= 0 && !ret) {
+            close(acquireFence);
+        }
+    } else {
+        return GRALLOC1_ERROR_UNSUPPORTED;
+    }
+
+    if (ret) {
+        return GRALLOC1_ERROR_NO_RESOURCES;
+    }
+
+    mod->adapter.get_flexible_layout(&mod->base, buffer,
+            &ycbcr, outFlexLayout);
+
+    return GRALLOC1_ERROR_NONE;
+}
+
+static int32_t device_unlock(struct gralloc1_device* device,
+        buffer_handle_t buffer, int32_t* outReleaseFence)
+{
+    const struct gralloc1_adapter_module* mod =
+        gralloc1_adapter_module(device);
+    int ret;
+
+    if (mod->adapter.real_module_api_version >=
+            GRALLOC_MODULE_API_VERSION_0_3) {
+        ret = mod->base.unlockAsync(&mod->base, buffer, outReleaseFence);
+    } else {
+        ret = mod->base.unlock(&mod->base, buffer);
+        if (!ret) {
+            *outReleaseFence = -1;
+        }
+    }
+
+    return (ret) ? GRALLOC1_ERROR_BAD_HANDLE : GRALLOC1_ERROR_NONE;
+}
+
+static gralloc1_function_pointer_t device_get_function(
+        struct gralloc1_device* device, int32_t descriptor)
+{
+    switch ((gralloc1_function_descriptor_t) descriptor) {
+#define CASE(id, ptr)              \
+    case GRALLOC1_FUNCTION_ ## id: \
+        return (gralloc1_function_pointer_t) device_ ## ptr
+    CASE(DUMP, dump);
+    CASE(CREATE_DESCRIPTOR, create_descriptor);
+    CASE(DESTROY_DESCRIPTOR, destroy_descriptor);
+    CASE(SET_CONSUMER_USAGE, set_consumer_usage);
+    CASE(SET_DIMENSIONS, set_dimensions);
+    CASE(SET_FORMAT, set_format);
+    CASE(SET_PRODUCER_USAGE, set_producer_usage);
+    CASE(GET_BACKING_STORE, get_backing_store);
+    CASE(GET_CONSUMER_USAGE, get_consumer_usage);
+    CASE(GET_DIMENSIONS, get_dimensions);
+    CASE(GET_FORMAT, get_format);
+    CASE(GET_PRODUCER_USAGE, get_producer_usage);
+    CASE(GET_STRIDE, get_stride);
+    CASE(ALLOCATE, allocate);
+    CASE(RETAIN, retain);
+    CASE(RELEASE, release);
+    CASE(GET_NUM_FLEX_PLANES, get_num_flex_planes);
+    CASE(LOCK, lock);
+    CASE(LOCK_FLEX, lock_flex);
+    CASE(UNLOCK, unlock);
+#undef CASE
+    default: return NULL;
+    }
+}
+
+static void device_get_capabilities(struct gralloc1_device* device,
+        uint32_t* outCount, int32_t* outCapabilities)
+{
+    *outCount = 0;
+}
+
+static int device_close(struct hw_device_t* device)
+{
+    struct gralloc1_adapter_device* dev =
+        (struct gralloc1_adapter_device*) device;
+    int ret;
+
+    ret = dev->alloc_dev->common.close(&dev->alloc_dev->common);
+    if (!ret) {
+        free(dev);
+    }
+
+    return ret;
+}
+
+int gralloc1_adapter_device_open(const struct hw_module_t* module,
+        const char* id, struct hw_device_t** device)
+{
+    const struct gralloc1_adapter_module* mod =
+        (const struct gralloc1_adapter_module*) module;
+    struct alloc_device_t* alloc_dev;
+    struct gralloc1_adapter_device* dev;
+    int ret;
+
+    if (strcmp(id, GRALLOC_HARDWARE_MODULE_ID) != 0) {
+        ALOGE("unknown gralloc1 device id: %s", id);
+        return -EINVAL;
+    }
+
+    ret = module->methods->open(module, GRALLOC_HARDWARE_GPU0,
+            (struct hw_device_t**) &alloc_dev);
+    if (ret) {
+        return ret;
+    }
+
+    dev = malloc(sizeof(*dev));
+    if (!dev) {
+        alloc_dev->common.close(&alloc_dev->common);
+        return -ENOMEM;
+    }
+
+    *dev = (struct gralloc1_adapter_device) {
+        .base = {
+            .common = {
+                .tag = HARDWARE_DEVICE_TAG,
+                .version = HARDWARE_DEVICE_API_VERSION(0, 0),
+                .module = (struct hw_module_t*) mod,
+                .close = device_close,
+            },
+            .getCapabilities = device_get_capabilities,
+            .getFunction = device_get_function,
+        },
+        .alloc_dev = alloc_dev,
+    };
+
+    *device = (struct hw_device_t*) dev;
+
+    return 0;
+}

graphics/allocator/2.0/default/gralloc1-adapter.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * 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 ANDROID_HARDWARE_GRALLOC1_ADAPTER_H
+#define ANDROID_HARDWARE_GRALLOC1_ADAPTER_H
+
+#include <stdbool.h>
+#include <hardware/gralloc.h>
+
+__BEGIN_DECLS
+
+struct gralloc1_adapter_buffer_info {
+    int width;
+    int height;
+    int format;
+    int usage;
+
+    int stride;
+    uint32_t num_flex_planes;
+};
+
+/* This struct must be embedded in the HAL's HAL_MODULE_INFO_SYM and must
+ * follow gralloc_module_t immediately. */
+struct gralloc1_adapter {
+    uint16_t real_module_api_version;
+
+    /* Return true if the buffer is registered.  A locally allocated buffer is
+     * always registered.
+     *
+     * This function is called frequently.  It must be thread safe just like
+     * other functions are.
+     */
+    bool (*is_registered)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer);
+
+    /* Set the adapter data for a registered buffer. */
+    void (*set_data)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer, void* data);
+
+    /* Get the adapter data for a registered buffer. */
+    void* (*get_data)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer);
+
+    /* Get the buffer info, such as width, height, etc. */
+    void (*get_info)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer,
+            struct gralloc1_adapter_buffer_info* info);
+
+    /* Get the flexilble layout matching ycbcr. */
+    void (*get_flexible_layout)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer, const struct android_ycbcr* ycbcr,
+            struct android_flex_layout* layout);
+};
+
+int gralloc1_adapter_device_open(const struct hw_module_t* module,
+        const char* id, struct hw_device_t** device);
+
+__END_DECLS
+
+#endif /* ANDROID_HARDWARE_GRALLOC1_ADAPTER_H */