text: /* SPDX-License-Identifier: BSD-3-Clause
   * Copyright 2017 6WIND S.A.
   * Copyright 2017 Mellanox Technologies, Ltd
   */
  
  #ifndef _RTE_ETH_TAP_H_
  #define _RTE_ETH_TAP_H_
  
  #include <sys/queue.h>
  #include <sys/uio.h>
  #include <inttypes.h>
  #include <net/if.h>
  
  #include <linux_tap/if_tun.h>
  
  #include <rte_ethdev_driver.h>
  #include <rte_ether.h>
  #include <rte_gso.h>
  #include "tap_log.h"
  
  #ifdef IFF_MULTI_QUEUE
  #define RTE_PMD_TAP_MAX_QUEUES	TAP_MAX_QUEUES
  #else
  #define RTE_PMD_TAP_MAX_QUEUES	1
  #endif
  #define MAX_GSO_MBUFS 64
  
  enum rte_tuntap_type {
  	ETH_TUNTAP_TYPE_UNKNOWN,
  	ETH_TUNTAP_TYPE_TUN,
  	ETH_TUNTAP_TYPE_TAP,
  	ETH_TUNTAP_TYPE_MAX,
  };
  
  struct pkt_stats {
  	uint64_t opackets;              /* Number of output packets */
  	uint64_t ipackets;              /* Number of input packets */
  	uint64_t obytes;                /* Number of bytes on output */
  	uint64_t ibytes;                /* Number of bytes on input */
  	uint64_t errs;                  /* Number of TX error packets */
  	uint64_t ierrors;               /* Number of RX error packets */
  	uint64_t rx_nombuf;             /* Nb of RX mbuf alloc failures */
  };
  
  struct rx_queue {
  	struct rte_mempool *mp;         /* Mempool for RX packets */
  	uint32_t trigger_seen;          /* Last seen Rx trigger value */
  	uint16_t in_port;               /* Port ID */
  	uint16_t queue_id;		/* queue ID*/
  	struct pkt_stats stats;         /* Stats for this RX queue */
  	uint16_t nb_rx_desc;            /* max number of mbufs available */
  	struct rte_eth_rxmode *rxmode;  /* RX features */
  	struct rte_mbuf *pool;          /* mbufs pool for this queue */
  	struct iovec (*iovecs)[];       /* descriptors for this queue */
  	struct tun_pi pi;               /* packet info for iovecs */
  };
  
  struct tx_queue {
  	int type;                       /* Type field - TUN|TAP */
  	uint16_t *mtu;                  /* Pointer to MTU from dev_data */
  	uint16_t csum:1;                /* Enable checksum offloading */
  	struct pkt_stats stats;         /* Stats for this TX queue */
  	struct rte_gso_ctx gso_ctx;     /* GSO context */
  	uint16_t out_port;              /* Port ID */
  	uint16_t queue_id;		/* queue ID*/
  };
  
  struct pmd_internals {
  	struct rte_eth_dev *dev;          /* Ethernet device. */
  	char remote_iface[RTE_ETH_NAME_MAX_LEN]; /* Remote netdevice name */
  	char name[RTE_ETH_NAME_MAX_LEN];  /* Internal Tap device name */
  	int type;                         /* Type field - TUN|TAP */
  	struct ether_addr eth_addr;       /* Mac address of the device port */
  	struct ifreq remote_initial_flags;   /* Remote netdevice flags on init */
  	int remote_if_index;              /* remote netdevice IF_INDEX */
  	int if_index;                     /* IF_INDEX for the port */
  	int ioctl_sock;                   /* socket for ioctl calls */
  	int nlsk_fd;                      /* Netlink socket fd */
  	int flow_isolate;                 /* 1 if flow isolation is enabled */
  	int flower_support;               /* 1 if kernel supports, else 0 */
  	int flower_vlan_support;          /* 1 if kernel supports, else 0 */
  	int rss_enabled;                  /* 1 if RSS is enabled, else 0 */
  	/* implicit rules set when RSS is enabled */
  	int map_fd;                       /* BPF RSS map fd */
  	int bpf_fd[RTE_PMD_TAP_MAX_QUEUES];/* List of bpf fds per queue */
  	LIST_HEAD(tap_rss_flows, rte_flow) rss_flows;
  	LIST_HEAD(tap_flows, rte_flow) flows;        /* rte_flow rules */
  	/* implicit rte_flow rules set when a remote device is active */
  	LIST_HEAD(tap_implicit_flows, rte_flow) implicit_flows;
  	struct rx_queue rxq[RTE_PMD_TAP_MAX_QUEUES]; /* List of RX queues */
  	struct tx_queue txq[RTE_PMD_TAP_MAX_QUEUES]; /* List of TX queues */
  	struct rte_intr_handle intr_handle;          /* LSC interrupt handle. */
  	int ka_fd;                        /* keep-alive file descriptor */
  };
  
  struct pmd_process_private {
  	int rxq_fds[RTE_PMD_TAP_MAX_QUEUES];
  	int txq_fds[RTE_PMD_TAP_MAX_QUEUES];
  };
  
  /* tap_intr.c */
  
  int tap_rx_intr_vec_set(struct rte_eth_dev *dev, int set);
  
  #endif /* _RTE_ETH_TAP_H_ */
  