diff --git a/neuralnetworks/1.3/IBuffer.hal b/neuralnetworks/1.3/IBuffer.hal
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+++ b/neuralnetworks/1.3/IBuffer.hal
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+/*
+ * Copyright (C) 2020 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.neuralnetworks@1.3;
+
+import @1.0::ErrorStatus;
+
+/**
+ * This interface represents a device memory buffer.
+ */
+interface IBuffer {
+    /**
+     * Retrieves the content of this buffer to a shared memory region.
+     *
+     * The IBuffer object must have been initialized before the call to IBuffer::copyTo.
+     * For more information on the state of the IBuffer object, refer to IDevice::allocate.
+     *
+     * @param dst The destination shared memory region.
+     * @return status Error status of the call, must be:
+     *     - NONE if successful
+     *     - DEVICE_UNAVAILABLE if driver is offline or busy
+     *     - GENERAL_FAILURE if the IBuffer object is uninitialized, or there is an unspecified
+     *       error
+     *     - INVALID_ARGUMENT if provided memory is invalid
+     */
+    copyTo(memory dst) generates (ErrorStatus status);
+
+    /**
+     * Sets the content of this buffer from a shared memory region.
+     *
+     * @param src The source shared memory region.
+     * @param dimensions Updated dimensional information. If the dimensions of the IBuffer object
+     *     are not fully specified, then the dimensions must be fully specified here. If the
+     *     dimensions of the IBuffer object are fully specified, then the dimensions may be empty
+     *     here. If dimensions.size() > 0, then all dimensions must be specified here, and any
+     *     dimension that was specified in the IBuffer object must have the same value here.
+     * @return status Error status of the call, must be:
+     *     - NONE if successful
+     *     - DEVICE_UNAVAILABLE if driver is offline or busy
+     *     - GENERAL_FAILURE if there is an unspecified error
+     *     - INVALID_ARGUMENT if provided memory is invalid, or if the dimensions is invalid
+     */
+    copyFrom(memory src, vec<uint32_t> dimensions) generates (ErrorStatus status);
+};