diff --git a/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.h b/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.h
index aeb1e94..b1416f6 100644
--- a/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.h
+++ b/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.h
@@ -30,6 +30,195 @@
 #define FPGA_5GNR_FEC_PF_DEVICE_ID (0x0D8F)
 #define FPGA_5GNR_FEC_VF_DEVICE_ID (0x0D90)
 
+/* Align DMA descriptors to 256 bytes - cache-aligned */
+#define FPGA_RING_DESC_ENTRY_LENGTH (8)
+/* Ring size is in 256 bits (32 bytes) units */
+#define FPGA_RING_DESC_LEN_UNIT_BYTES (32)
+/* Maximum size of queue */
+#define FPGA_RING_MAX_SIZE (1024)
+#define FPGA_FLR_TIMEOUT_UNIT (16.384)
+
+#define FPGA_NUM_UL_QUEUES (32)
+#define FPGA_NUM_DL_QUEUES (32)
+#define FPGA_TOTAL_NUM_QUEUES (FPGA_NUM_UL_QUEUES + FPGA_NUM_DL_QUEUES)
+#define FPGA_NUM_INTR_VEC (FPGA_TOTAL_NUM_QUEUES - RTE_INTR_VEC_RXTX_OFFSET)
+
+#define FPGA_INVALID_HW_QUEUE_ID (0xFFFFFFFF)
+
+#define FPGA_QUEUE_FLUSH_TIMEOUT_US (1000)
+#define FPGA_HARQ_RDY_TIMEOUT (10)
+#define FPGA_TIMEOUT_CHECK_INTERVAL (5)
+#define FPGA_DDR_OVERFLOW (0x10)
+
+#define FPGA_5GNR_FEC_DDR_WR_DATA_LEN_IN_BYTES 8
+#define FPGA_5GNR_FEC_DDR_RD_DATA_LEN_IN_BYTES 8
+
+
+/* FPGA 5GNR FEC Register mapping on BAR0 */
+enum {
+	FPGA_5GNR_FEC_VERSION_ID = 0x00000000, /* len: 4B */
+	FPGA_5GNR_FEC_CONFIGURATION = 0x00000004, /* len: 2B */
+	FPGA_5GNR_FEC_QUEUE_PF_VF_MAP_DONE = 0x00000008, /* len: 1B */
+	FPGA_5GNR_FEC_LOAD_BALANCE_FACTOR = 0x0000000a, /* len: 2B */
+	FPGA_5GNR_FEC_RING_DESC_LEN = 0x0000000c, /* len: 2B */
+	FPGA_5GNR_FEC_FLR_TIME_OUT = 0x0000000e, /* len: 2B */
+	FPGA_5GNR_FEC_VFQ_FLUSH_STATUS_LW = 0x00000018, /* len: 4B */
+	FPGA_5GNR_FEC_VFQ_FLUSH_STATUS_HI = 0x0000001c, /* len: 4B */
+	FPGA_5GNR_FEC_QUEUE_MAP = 0x00000040, /* len: 256B */
+	FPGA_5GNR_FEC_RING_CTRL_REGS = 0x00000200, /* len: 2048B */
+	FPGA_5GNR_FEC_DDR4_WR_ADDR_REGS = 0x00000A00, /* len: 4B */
+	FPGA_5GNR_FEC_DDR4_WR_DATA_REGS = 0x00000A08, /* len: 8B */
+	FPGA_5GNR_FEC_DDR4_WR_DONE_REGS = 0x00000A10, /* len: 1B */
+	FPGA_5GNR_FEC_DDR4_RD_ADDR_REGS = 0x00000A18, /* len: 4B */
+	FPGA_5GNR_FEC_DDR4_RD_DONE_REGS = 0x00000A20, /* len: 1B */
+	FPGA_5GNR_FEC_DDR4_RD_RDY_REGS = 0x00000A28, /* len: 1B */
+	FPGA_5GNR_FEC_DDR4_RD_DATA_REGS = 0x00000A30, /* len: 8B */
+	FPGA_5GNR_FEC_DDR4_ADDR_RDY_REGS = 0x00000A38, /* len: 1B */
+	FPGA_5GNR_FEC_HARQ_BUF_SIZE_RDY_REGS = 0x00000A40, /* len: 1B */
+	FPGA_5GNR_FEC_HARQ_BUF_SIZE_REGS = 0x00000A48  /* len: 4B */
+};
+
+/* FPGA 5GNR FEC Ring Control Registers */
+enum {
+	FPGA_5GNR_FEC_RING_HEAD_ADDR = 0x00000008,
+	FPGA_5GNR_FEC_RING_SIZE = 0x00000010,
+	FPGA_5GNR_FEC_RING_MISC = 0x00000014,
+	FPGA_5GNR_FEC_RING_ENABLE = 0x00000015,
+	FPGA_5GNR_FEC_RING_FLUSH_QUEUE_EN = 0x00000016,
+	FPGA_5GNR_FEC_RING_SHADOW_TAIL = 0x00000018,
+	FPGA_5GNR_FEC_RING_HEAD_POINT = 0x0000001C
+};
+
+/* FPGA 5GNR FEC DESCRIPTOR ERROR */
+enum {
+	DESC_ERR_NO_ERR = 0x0,
+	DESC_ERR_K_P_OUT_OF_RANGE = 0x1,
+	DESC_ERR_Z_C_NOT_LEGAL = 0x2,
+	DESC_ERR_DESC_OFFSET_ERR = 0x3,
+	DESC_ERR_DESC_READ_FAIL = 0x8,
+	DESC_ERR_DESC_READ_TIMEOUT = 0x9,
+	DESC_ERR_DESC_READ_TLP_POISONED = 0xA,
+	DESC_ERR_CB_READ_FAIL = 0xC,
+	DESC_ERR_CB_READ_TIMEOUT = 0xD,
+	DESC_ERR_CB_READ_TLP_POISONED = 0xE,
+	DESC_ERR_HBSTORE_ERR = 0xF
+};
+
+
+/* FPGA 5GNR FEC DMA Encoding Request Descriptor */
+struct __attribute__((__packed__)) fpga_dma_enc_desc {
+	uint32_t done:1,
+		rsrvd0:7,
+		error:4,
+		rsrvd1:4,
+		num_null:10,
+		rsrvd2:6;
+	uint32_t ncb:15,
+		rsrvd3:1,
+		k0:16;
+	uint32_t irq_en:1,
+		crc_en:1,
+		rsrvd4:1,
+		qm_idx:3,
+		bg_idx:1,
+		zc:9,
+		desc_idx:10,
+		rsrvd5:6;
+	uint16_t rm_e;
+	uint16_t k_;
+	uint32_t out_addr_lw;
+	uint32_t out_addr_hi;
+	uint32_t in_addr_lw;
+	uint32_t in_addr_hi;
+
+	union {
+		struct {
+			/* Virtual addresses used to retrieve SW context info */
+			void *op_addr;
+			/* Stores information about total number of Code Blocks
+			 * in currently processed Transport Block
+			 */
+			uint64_t cbs_in_op;
+		};
+
+		uint8_t sw_ctxt[FPGA_RING_DESC_LEN_UNIT_BYTES *
+					(FPGA_RING_DESC_ENTRY_LENGTH - 1)];
+	};
+};
+
+
+/* FPGA 5GNR DPC FEC DMA Decoding Request Descriptor */
+struct __attribute__((__packed__)) fpga_dma_dec_desc {
+	uint32_t done:1,
+		iter:5,
+		et_pass:1,
+		crcb_pass:1,
+		error:4,
+		qm_idx:3,
+		max_iter:5,
+		bg_idx:1,
+		rsrvd0:1,
+		harqin_en:1,
+		zc:9;
+	uint32_t hbstroe_offset:22,
+		num_null:10;
+	uint32_t irq_en:1,
+		ncb:15,
+		desc_idx:10,
+		drop_crc24b:1,
+		crc24b_ind:1,
+		rv:2,
+		et_dis:1,
+		rsrvd2:1;
+	uint32_t harq_input_length:16,
+		rm_e:16;/*the inbound data byte length*/
+	uint32_t out_addr_lw;
+	uint32_t out_addr_hi;
+	uint32_t in_addr_lw;
+	uint32_t in_addr_hi;
+
+	union {
+		struct {
+			/* Virtual addresses used to retrieve SW context info */
+			void *op_addr;
+			/* Stores information about total number of Code Blocks
+			 * in currently processed Transport Block
+			 */
+			uint8_t cbs_in_op;
+		};
+
+		uint32_t sw_ctxt[8 * (FPGA_RING_DESC_ENTRY_LENGTH - 1)];
+	};
+};
+
+/* FPGA 5GNR DMA Descriptor */
+union fpga_dma_desc {
+	struct fpga_dma_enc_desc enc_req;
+	struct fpga_dma_dec_desc dec_req;
+};
+
+/* FPGA 5GNR FEC Ring Control Register */
+struct __attribute__((__packed__)) fpga_ring_ctrl_reg {
+	uint64_t ring_base_addr;
+	uint64_t ring_head_addr;
+	uint16_t ring_size:11;
+	uint16_t rsrvd0;
+	union { /* Miscellaneous register */
+		uint8_t misc;
+		uint8_t max_ul_dec:5,
+			max_ul_dec_en:1,
+			rsrvd1:2;
+	};
+	uint8_t enable;
+	uint8_t flush_queue_en;
+	uint8_t rsrvd2;
+	uint16_t shadow_tail;
+	uint16_t rsrvd3;
+	uint16_t head_point;
+	uint16_t rsrvd4;
+
+};
+
 /* Private data structure for each FPGA FEC device */
 struct fpga_5gnr_fec_device {
 	/** Base address of MMIO registers (BAR0) */
