text: /* SPDX-License-Identifier: BSD-3-Clause
   * Copyright(c) 2014-2018 Broadcom
   * All rights reserved.
   */
  
  #ifndef _BNXT_TXR_H_
  #define _BNXT_TXR_H_
  
  #include <rte_io.h>
  
  #define MAX_TX_RINGS	16
  #define BNXT_TX_PUSH_THRESH 92
  #define BNXT_MAX_TSO_SEGS	32
  #define BNXT_MIN_PKT_SIZE	52
  
  #define B_TX_DB(db, prod)	rte_write32((DB_KEY_TX | (prod)), db)
  
  struct bnxt_tx_ring_info {
  	uint16_t		tx_prod;
  	uint16_t		tx_cons;
  	struct bnxt_db_info     tx_db;
  
  	struct tx_bd_long	*tx_desc_ring;
  	struct bnxt_sw_tx_bd	*tx_buf_ring;
  
  	rte_iova_t		tx_desc_mapping;
  
  #define BNXT_DEV_STATE_CLOSING	0x1
  	uint32_t		dev_state;
  
  	struct bnxt_ring	*tx_ring_struct;
  };
  
  struct bnxt_sw_tx_bd {
  	struct rte_mbuf		*mbuf; /* mbuf associated with TX descriptor */
  	uint8_t			is_gso;
  	unsigned short		nr_bds;
  };
  
  static inline uint32_t bnxt_tx_bds_in_hw(struct bnxt_tx_queue *txq)
  {
  	return ((txq->tx_ring->tx_prod - txq->tx_ring->tx_cons) &
  		txq->tx_ring->tx_ring_struct->ring_mask);
  }
  
  static inline uint32_t bnxt_tx_avail(struct bnxt_tx_queue *txq)
  {
  	/* Tell compiler to fetch tx indices from memory. */
  	rte_compiler_barrier();
  
  	return ((txq->tx_ring->tx_ring_struct->ring_size -
  		 bnxt_tx_bds_in_hw(txq)) - 1);
  }
  
  void bnxt_free_tx_rings(struct bnxt *bp);
  int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq);
  int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id);
  uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
  			       uint16_t nb_pkts);
  uint16_t bnxt_dummy_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
  			      uint16_t nb_pkts);
  #ifdef RTE_ARCH_X86
  uint16_t bnxt_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
  			    uint16_t nb_pkts);
  #endif
  
  int bnxt_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id);
  int bnxt_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id);
  
  #define PKT_TX_OIP_IIP_TCP_UDP_CKSUM	(PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM | \
  					PKT_TX_IP_CKSUM | PKT_TX_OUTER_IP_CKSUM)
  #define PKT_TX_OIP_IIP_UDP_CKSUM	(PKT_TX_UDP_CKSUM | \
  					PKT_TX_IP_CKSUM | PKT_TX_OUTER_IP_CKSUM)
  #define PKT_TX_OIP_IIP_TCP_CKSUM	(PKT_TX_TCP_CKSUM | \
  					PKT_TX_IP_CKSUM | PKT_TX_OUTER_IP_CKSUM)
  #define PKT_TX_IIP_TCP_UDP_CKSUM	(PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM | \
  					PKT_TX_IP_CKSUM)
  #define PKT_TX_IIP_TCP_CKSUM		(PKT_TX_TCP_CKSUM | PKT_TX_IP_CKSUM)
  #define PKT_TX_IIP_UDP_CKSUM		(PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM)
  #define PKT_TX_OIP_TCP_UDP_CKSUM	(PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM | \
  					PKT_TX_OUTER_IP_CKSUM)
  #define PKT_TX_OIP_UDP_CKSUM		(PKT_TX_UDP_CKSUM | \
  					PKT_TX_OUTER_IP_CKSUM)
  #define PKT_TX_OIP_TCP_CKSUM		(PKT_TX_TCP_CKSUM | \
  					PKT_TX_OUTER_IP_CKSUM)
  #define PKT_TX_OIP_IIP_CKSUM		(PKT_TX_IP_CKSUM |	\
  					 PKT_TX_OUTER_IP_CKSUM)
  #define PKT_TX_TCP_UDP_CKSUM		(PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM)
  
  
  #define TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM	(TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM | \
  					TX_BD_LONG_LFLAGS_T_IP_CHKSUM | \
  					TX_BD_LONG_LFLAGS_IP_CHKSUM)
  #define TX_BD_FLG_IP_TCP_UDP_CHKSUM	(TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM | \
  					TX_BD_LONG_LFLAGS_IP_CHKSUM)
  #define TX_BD_FLG_TIP_IP_CHKSUM		(TX_BD_LONG_LFLAGS_T_IP_CHKSUM | \
  					TX_BD_LONG_LFLAGS_IP_CHKSUM)
  #define TX_BD_FLG_TIP_TCP_UDP_CHKSUM	(TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM | \
  					TX_BD_LONG_LFLAGS_T_IP_CHKSUM)
  
  #endif
  