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diff --git a/drivers/net/ena/base/ena_defs/ena_common_defs.h b/drivers/net/ena/base/ena_defs/ena_common_defs.h
new file mode 100644
index 00000000..95e0f389
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+++ b/drivers/net/ena/base/ena_defs/ena_common_defs.h
@@ -0,0 +1,54 @@
+/*-
+* BSD LICENSE
+*
+* Copyright (c) 2015-2016 Amazon.com, Inc. or its affiliates.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+*
+* * Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* * Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in
+* the documentation and/or other materials provided with the
+* distribution.
+* * Neither the name of copyright holder nor the names of its
+* contributors may be used to endorse or promote products derived
+* from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef _ENA_COMMON_H_
+#define _ENA_COMMON_H_
+
+/* spec version */
+#define ENA_COMMON_SPEC_VERSION_MAJOR	0 /* spec version major */
+#define ENA_COMMON_SPEC_VERSION_MINOR	10 /* spec version minor */
+
+/* ENA operates with 48-bit memory addresses. ena_mem_addr_t */
+struct ena_common_mem_addr {
+	/* word 0 : low 32 bit of the memory address */
+	uint32_t mem_addr_low;
+
+	/* word 1 : */
+	/* high 16 bits of the memory address */
+	uint16_t mem_addr_high;
+
+	/* MBZ */
+	uint16_t reserved16;
+};
+
+#endif /*_ENA_COMMON_H_ */