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diff --git a/target_firmware/magpie_fw_dev/target/inc/dma_engine_api.h b/target_firmware/magpie_fw_dev/target/inc/dma_engine_api.h
new file mode 100755
index 0000000..e57c5e0
--- /dev/null
+++ b/target_firmware/magpie_fw_dev/target/inc/dma_engine_api.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted (subject to the limitations in the
+ * disclaimer below) 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 Qualcomm Atheros nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
+ * GRANTED BY THIS LICENSE.  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.
+ */
+/*
+ * @File: dma_engine_api.h
+ *
+ * @Abstract: DMA Engine api
+ *
+ * @Notes:
+ */
+
+#ifndef _DMA_ENGINE_API_H
+#define _DMA_ENGINE_API_H
+
+#include <vbuf_api.h>
+#include <vdesc_api.h>
+
+struct zsDmaDesc
+{
+#if 1   // BIG_ENDIAN
+	volatile u16_t      ctrl;       // Descriptor control
+	volatile u16_t      status;     // Descriptor status
+	volatile u16_t      totalLen;   // Total length
+	volatile u16_t      dataSize;   // Data size
+#else
+	volatile u16_t      status;     // Descriptor status
+	volatile u16_t      ctrl;       // Descriptor control
+	volatile u16_t      dataSize;   // Data size
+	volatile u16_t      totalLen;   // Total length
+#endif
+	struct zsDmaDesc*   lastAddr;   // Last address of this chain
+	volatile u32_t      dataAddr;   // Data buffer address
+	struct zsDmaDesc*   nextAddr;   // Next TD address
+};
+
+struct zsDmaQueue
+{
+	struct zsDmaDesc* head;
+	struct zsDmaDesc* terminator;
+};
+
+// Subclass of zsDmaQueue for TX
+struct zsTxDmaQueue
+{
+	struct zsDmaDesc* head;
+	struct zsDmaDesc* terminator;
+
+	/* Below are fields specific to TX */
+	VBUF *xmited_buf_head;
+	VBUF *xmited_buf_tail;
+};
+
+/* hardware API table structure (API descriptions below) */
+struct dma_engine_api
+{
+	void  (*_init)();
+
+	void  (*_init_rx_queue)(struct zsDmaQueue *q);
+
+	void  (*_init_tx_queue)(struct zsTxDmaQueue *q);
+
+	void  (*_config_rx_queue)(struct zsDmaQueue *q, int num_desc, int buf_size);
+
+	void  (*_xmit_buf)(struct zsTxDmaQueue *q, VBUF *buf);
+
+	void  (*_flush_xmit)(struct zsDmaQueue *q);
+
+	VBUF* (*_reap_recv_buf)(struct zsDmaQueue *q);
+
+	void  (*_return_recv_buf)(struct zsDmaQueue *q, VBUF *buf);
+
+	VBUF* (*_reap_xmited_buf)(struct zsTxDmaQueue *q);
+
+	void  (*_swap_data)(struct zsDmaDesc* desc);
+
+	int   (*_has_compl_packets)(struct zsDmaQueue *q);
+
+	void  (*_desc_dump)(struct zsDmaQueue *q);
+
+	/* The functions below are for patchable */
+	struct zsDmaDesc* (*_get_packet)(struct zsDmaQueue* q);
+	void  (*_reclaim_packet)(struct zsDmaQueue* q, struct zsDmaDesc* desc);
+	void (*_put_packet)(struct zsDmaQueue* q, struct zsDmaDesc* desc);
+
+	/* room to expand this table by another table */
+	void *pReserved;
+};
+
+extern void dma_engine_module_install(struct dma_engine_api *apis);
+
+#endif /* #ifndef _DMA_ENGINE_API_H */