diff --git a/graphics/mapper/2.0/IMapper.hal b/graphics/mapper/2.0/IMapper.hal
new file mode 100644
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+++ b/graphics/mapper/2.0/IMapper.hal
@@ -0,0 +1,323 @@
+/*
+ * Copyright (C) 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.
+ */
+
+package android.hardware.graphics.mapper@2.0;
+
+import android.hardware.graphics.common@1.0::PixelFormat;
+import android.hardware.graphics.allocator@2.0;
+
+interface IMapper {
+    struct Rect {
+        int32_t left;
+        int32_t top;
+        int32_t width;
+        int32_t height;
+    };
+
+    /*
+     * Adds a reference to the given buffer handle.
+     *
+     * A buffer handle received from a remote process or exported by
+     * IAllocator::exportHandle is unknown to the mapper. There is also no
+     * guarantee that the buffer's backing store will stay alive. This
+     * function must be called at least once in both cases to intrdouce the
+     * buffer handle to the mapper and to secure the backing store. It may
+     * also be called more than once to increase the reference count if two
+     * components in the same process want to interact with the buffer
+     * independently.
+     *
+     * @param bufferHandle is the buffer to which a reference must be added.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid
+     *                  NO_RESOURCES when it is not possible to add a
+     *                               reference to this buffer at this time
+     */
+    @entry
+    @callflow(next="*")
+    retain(handle bufferHandle) generates (Error error);
+
+    /*
+     * Removes a reference from the given buffer buffer.
+     *
+     * If no references remain, the buffer handle must be freed with
+     * native_handle_close/native_handle_delete by the mapper. When the last
+     * buffer handle referring to a particular backing store is freed, that
+     * backing store must also be freed.
+     *
+     * @param bufferHandle is the buffer from which a reference must be
+     *        removed.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     */
+    @exit
+    release(handle bufferHandle) generates (Error error);
+
+    /*
+     * Gets the width and height of the buffer in pixels.
+     *
+     * See IAllocator::BufferDescriptorInfo for more information.
+     *
+     * @param bufferHandle is the buffer from which to get the dimensions.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return width is the width of the buffer in pixels.
+     * @return height is the height of the buffer in pixels.
+     */
+    @callflow(next="*")
+    getDimensions(handle bufferHandle)
+       generates (Error error,
+                  uint32_t width,
+                  uint32_t height);
+
+    /*
+     * Gets the format of the buffer.
+     *
+     * See IAllocator::BufferDescriptorInfo for more information.
+     *
+     * @param bufferHandle is the buffer from which to get format.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return format is the format of the buffer.
+     */
+    @callflow(next="*")
+    getFormat(handle bufferHandle)
+        generates (Error error,
+                   PixelFormat format);
+
+    /*
+     * Gets the number of layers of the buffer.
+     *
+     * See IAllocator::BufferDescriptorInfo for more information.
+     *
+     * @param bufferHandle is the buffer from which to get format.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return layerCount is the number of layers of the buffer.
+     */
+    @callflow(next="*")
+    getLayerCount(handle bufferHandle)
+       generates (Error error,
+                  uint32_t layerCount);
+
+    /*
+     * Gets the producer usage flags which were used to allocate this buffer.
+     *
+     * See IAllocator::BufferDescriptorInfo for more information.
+     *
+     * @param bufferHandle is the buffer from which to get the producer usage
+     *        flags.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return usageMask contains the producer usage flags of the buffer.
+     */
+    @callflow(next="*")
+    getProducerUsageMask(handle bufferHandle)
+              generates (Error error,
+                         uint64_t usageMask);
+
+    /*
+     * Gets the consumer usage flags which were used to allocate this buffer.
+     *
+     * See IAllocator::BufferDescriptorInfo for more information.
+     *
+     * @param bufferHandle is the buffer from which to get the consumer usage
+     *        flags.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return usageMask contains the consumer usage flags of the buffer.
+     */
+    @callflow(next="*")
+    getConsumerUsageMask(handle bufferHandle)
+              generates (Error error,
+                         uint64_t usageMask);
+
+    /*
+     * Gets a value that uniquely identifies the backing store of the given
+     * buffer.
+     *
+     * Buffers which share a backing store should return the same value from
+     * this function. If the buffer is present in more than one process, the
+     * backing store value for that buffer is not required to be the same in
+     * every process.
+     *
+     * @param device is the mapper device.
+     * @param bufferHandle is the buffer from which to get the backing store
+     *        identifier.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return store is the backing store identifier for this buffer.
+     */
+    @callflow(next="*")
+    getBackingStore(handle bufferHandle)
+         generates (Error error,
+                    BackingStore store);
+
+    /*
+     * Gets the stride of the buffer in pixels.
+     *
+     * The stride is the offset in pixel-sized elements between the same
+     * column in two adjacent rows of pixels. This may not be equal to the
+     * width of the buffer.
+     *
+     * @param device is the mapper device.
+     * @param bufferHandle is the buffer from which to get the stride.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     *                  UNDEFINED when the notion of a stride is not
+     *                            meaningful for the buffer format.
+     * @return store is the stride in pixels.
+     */
+    @callflow(next="*")
+    getStride(handle bufferHandle)
+        generates (Error error,
+                   uint32_t stride);
+
+    /*
+     * Locks the given buffer for the specified CPU usage.
+     *
+     * Exactly one of producerUsageMask and consumerUsageMask must be 0. The
+     * usage which is not 0 must be one of the *Usage::CPU* values, as
+     * applicable. Locking a buffer for a non-CPU usage is not supported.
+     *
+     * Locking the same buffer simultaneously from multiple threads is
+     * permitted, but if any of the threads attempt to lock the buffer for
+     * writing, the behavior is undefined, except that it must not cause
+     * process termination or block the client indefinitely. Leaving the
+     * buffer content in an indeterminate state or returning an error are both
+     * acceptable.
+     *
+     * The client must not modify the content of the buffer outside of
+     * accessRegion, and the device need not guarantee that content outside of
+     * accessRegion is valid for reading. The result of reading or writing
+     * outside of accessRegion is undefined, except that it must not cause
+     * process termination.
+     *
+     * data will be filled with a pointer to the locked buffer memory. This
+     * address will represent the top-left corner of the entire buffer, even
+     * if accessRegion does not begin at the top-left corner.
+     *
+     * acquireFence is a file descriptor referring to a acquire sync fence
+     * object, which will be signaled when it is safe for the device to access
+     * the contents of the buffer (prior to locking). If it is already safe to
+     * access the buffer contents, -1 may be passed instead.
+     *
+     * @param bufferHandle is the buffer to lock.
+     * @param producerUsageMask contains the producer usage flags to request;
+     *        either this or consumerUsagemask must be 0, and the other must
+     *        be a CPU usage.
+     * @param consumerUsageMask contains the consumer usage flags to request;
+     *        either this or producerUsageMask must be 0, and the other must
+     *        be a CPU usage.
+     * @param accessRegion is the portion of the buffer that the client
+     *        intends to access.
+     * @param acquireFence is a sync fence file descriptor as described above.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     *                  BAD_VALUE when neither or both of producerUsageMask
+     *                            and consumerUsageMask were 0, or the usage
+     *                            which was not 0 was not a CPU usage.
+     *                  NO_RESOURCES when the buffer cannot be locked at this
+     *                               time, but locking may succeed at a future
+     *                               time.
+     *                  UNSUPPORTED when the buffer cannot be locked with the
+     *                              given usage, and any future attempts at
+     *                              locking will also fail.
+     * @return data will be filled with a CPU-accessible pointer to the buffer
+     *         data.
+     */
+    @callflow(next="unlock")
+    lock(handle bufferHandle,
+         uint64_t producerUsageMask,
+         uint64_t consumerUsageMask,
+         Rect accessRegion,
+         handle acquireFence)
+        generates (Error error,
+                   pointer data);
+
+    /*
+     * This is largely the same as lock(), except that instead of returning a
+     * pointer directly to the buffer data, it returns an FlexLayout struct
+     * describing how to access the data planes.
+     *
+     * This function must work on buffers with PixelFormat::YCbCr_*_888 if
+     * supported by the device, as well as with any other formats requested by
+     * multimedia codecs when they are configured with a
+     * flexible-YUV-compatible color format.
+     *
+     * This function may also be called on buffers of other formats, including
+     * non-YUV formats, but if the buffer format is not compatible with a
+     * flexible representation, it may return UNSUPPORTED.
+     *
+     * @param device is the mapper device.
+     * @param bufferHandle is the buffer to lock.
+     * @param producerUsageMask contains the producer usage flags to request;
+     *        either this or consumerUsagemask must be 0, and the other must
+     *        be a CPU usage.
+     * @param consumerUsageMask contains the consumer usage flags to request;
+     *        either this or producerUsageMask must be 0, and the other must
+     *        be a CPU usage.
+     * @param accessRegion is the portion of the buffer that the client
+     *        intends to access.
+     * @param acquireFence is a sync fence file descriptor as described in
+     *        lock().
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     *                  BAD_VALUE when neither or both of producerUsageMask
+     *                            and consumerUsageMask were 0, or the usage
+     *                            which was not 0 was not a CPU usage.
+     *                  NO_RESOURCES when the buffer cannot be locked at this
+     *                               time, but locking may succeed at a future
+     *                               time.
+     *                  UNSUPPORTED when the buffer cannot be locked with the
+     *                              given usage, and any future attempts at
+     *                              locking will also fail.
+     * @return flexLayout will be filled with the description of the planes in
+     *         the buffer.
+     */
+    @callflow(next="unlock")
+    lockFlex(handle bufferHandle,
+             uint64_t producerUsageMask,
+             uint64_t consumerUsageMask,
+             Rect accessRegion,
+             handle acquireFence)
+        generates (Error error,
+                   FlexLayout layout);
+
+    /*
+     * This function indicates to the device that the client will be done with
+     * the buffer when releaseFence signals.
+     *
+     * releaseFence will be filled with a file descriptor referring to a
+     * release sync fence object, which will be signaled when it is safe to
+     * access the contents of the buffer (after the buffer has been unlocked).
+     * If it is already safe to access the buffer contents, then -1 may be
+     * returned instead.
+     *
+     * This function is used to unlock both buffers locked by lock() and those
+     * locked by lockFlex().
+     *
+     * @param device is the mapper device.
+     * @param bufferHandle is the buffer to unlock.
+     * @return error is NONE upon success. Otherwise,
+     *                  BAD_BUFFER when the buffer handle is invalid.
+     * @return releaseFence is a sync fence file descriptor as described
+     *         above.
+     */
+    @callflow(next="*")
+    unlock(handle bufferHandle)
+        generates (Error error,
+                   handle releaseFence);
+};