-#define BUF_VECTOR_MAX 256
-
-/**
- * Structure contains buffer address, length and descriptor index
- * from vring to do scatter RX.
- */
-struct buf_vector {
- uint64_t buf_addr;
- uint32_t buf_len;
- uint32_t desc_idx;
-};
-
-/**
- * Structure contains variables relevant to RX/TX virtqueues.
- */
-struct vhost_virtqueue {
- struct vring_desc *desc; /**< Virtqueue descriptor ring. */
- struct vring_avail *avail; /**< Virtqueue available ring. */
- struct vring_used *used; /**< Virtqueue used ring. */
- uint32_t size; /**< Size of descriptor ring. */
- uint32_t backend; /**< Backend value to determine if device should started/stopped. */
- uint16_t vhost_hlen; /**< Vhost header length (varies depending on RX merge buffers. */
- volatile uint16_t last_used_idx; /**< Last index used on the available ring */
- volatile uint16_t last_used_idx_res; /**< Used for multiple devices reserving buffers. */
- int callfd; /**< Used to notify the guest (trigger interrupt). */
- int kickfd; /**< Currently unused as polling mode is enabled. */
- int enabled;
- struct buf_vector buf_vec[BUF_VECTOR_MAX]; /**< for scatter RX. */
-} __rte_cache_aligned;
-
-
-/*
- * Make an extra wrapper for VIRTIO_NET_F_MQ and
- * VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX as they are
- * introduced since kernel v3.8. This makes our
- * code buildable for older kernel.
- */
-#ifdef VIRTIO_NET_F_MQ
- #define VHOST_MAX_QUEUE_PAIRS VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX
- #define VHOST_SUPPORTS_MQ (1ULL << VIRTIO_NET_F_MQ)
-#else
- #define VHOST_MAX_QUEUE_PAIRS 1
- #define VHOST_SUPPORTS_MQ 0
-#endif
-
-/**
- * Device structure contains all configuration information relating to the device.
- */
-struct virtio_net {
- struct virtio_memory *mem; /**< QEMU memory and memory region information. */
- uint64_t features; /**< Negotiated feature set. */
- uint64_t protocol_features; /**< Negotiated protocol feature set. */
- uint64_t device_fh; /**< device identifier. */
- uint32_t flags; /**< Device flags. Only used to check if device is running on data core. */
-#define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
- char ifname[IF_NAME_SZ]; /**< Name of the tap device or socket path. */
- uint32_t virt_qp_nb; /**< number of queue pair we have allocated */
- void *priv; /**< private context */
- struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2]; /**< Contains all virtqueue information. */
-} __rte_cache_aligned;
-
-/**
- * Information relating to memory regions including offsets to addresses in QEMUs memory file.
- */
-struct virtio_memory_regions {
- uint64_t guest_phys_address; /**< Base guest physical address of region. */
- uint64_t guest_phys_address_end; /**< End guest physical address of region. */
- uint64_t memory_size; /**< Size of region. */
- uint64_t userspace_address; /**< Base userspace address of region. */
- uint64_t address_offset; /**< Offset of region for address translation. */
-};
-
-
-/**
- * Memory structure includes region and mapping information.
- */
-struct virtio_memory {
- uint64_t base_address; /**< Base QEMU userspace address of the memory file. */
- uint64_t mapped_address; /**< Mapped address of memory file base in our applications memory space. */
- uint64_t mapped_size; /**< Total size of memory file. */
- uint32_t nregions; /**< Number of memory regions. */
- struct virtio_memory_regions regions[0]; /**< Memory region information. */
-};
-