#ifndef _VIRTIO_NET_H_
#define _VIRTIO_NET_H_
+/**
+ * @file
+ * Interface to vhost net
+ */
+
#include <stdint.h>
#include <linux/virtio_ring.h>
#include <linux/virtio_net.h>
#include <sys/eventfd.h>
+#include <sys/socket.h>
+#include <linux/if.h>
#include <rte_memory.h>
#include <rte_mempool.h>
-#include <rte_mbuf.h>
+
+struct rte_mbuf;
+
+#define VHOST_MEMORY_MAX_NREGIONS 8
/* Used to indicate that the device is running on a data core */
#define VIRTIO_DEV_RUNNING 1
#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;
+ uint64_t buf_addr;
+ uint32_t buf_len;
+ uint32_t desc_idx;
};
-/*
- * Structure contains variables relevant to TX/RX virtqueues.
+/**
+ * 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. */
- eventfd_t callfd; /* Currently unused as polling mode is enabled. */
- eventfd_t kickfd; /* Used to notify the guest (trigger interrupt). */
- /* Used for scatter RX. */
- struct buf_vector buf_vec[BUF_VECTOR_MAX];
+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. */
+ struct buf_vector buf_vec[BUF_VECTOR_MAX]; /**< for scatter RX. */
} __rte_cache_aligned;
-/*
+/**
* Device structure contains all configuration information relating to the device.
*/
-struct virtio_net
-{
- struct vhost_virtqueue *virtqueue[VIRTIO_QNUM]; /* Contains all virtqueue information. */
- struct virtio_memory *mem; /* QEMU memory and memory region information. */
- uint64_t features; /* Negotiated feature set. */
- uint64_t device_fh; /* device identifier. */
- uint32_t flags; /* Device flags. Only used to check if device is running on data core. */
- void *priv; /**< private context */
+struct virtio_net {
+ struct vhost_virtqueue *virtqueue[VIRTIO_QNUM]; /**< Contains all virtqueue information. */
+ 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. */
+ void *priv; /**< private context */
} __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. */
+ 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. */
- /* Memory region information. */
- struct virtio_memory_regions regions[0];
+ 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. */
};
-/*
+/**
* Device operations to add/remove device.
+ *
+ * Make sure to set VIRTIO_DEV_RUNNING to the device flags in new_device and
+ * remove it in destroy_device.
+ *
*/
struct virtio_net_device_ops {
- int (* new_device) (struct virtio_net *); /* Add device. */
- void (* destroy_device) (volatile struct virtio_net *); /* Remove device. */
+ int (*new_device)(struct virtio_net *); /**< Add device. */
+ void (*destroy_device)(volatile struct virtio_net *); /**< Remove device. */
};
static inline uint16_t __attribute__((always_inline))
/* Register vhost driver. dev_name could be different for multiple instance support. */
int rte_vhost_driver_register(const char *dev_name);
+/* Unregister vhost driver. This is only meaningful to vhost user. */
+int rte_vhost_driver_unregister(const char *dev_name);
+
/* Register callbacks. */
int rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const);
/* Start vhost driver session blocking loop. */
* be received from the physical port or from another virtual device. A packet
* count is returned to indicate the number of packets that were succesfully
* added to the RX queue.
+ * @param dev
+ * virtio-net device
* @param queue_id
* virtio queue index in mq case
+ * @param pkts
+ * array to contain packets to be enqueued
+ * @param count
+ * packets num to be enqueued
* @return
* num of packets enqueued
*/
* This function gets guest buffers from the virtio device TX virtqueue,
* construct host mbufs, copies guest buffer content to host mbufs and
* store them in pkts to be processed.
+ * @param dev
+ * virtio-net device
+ * @param queue_id
+ * virtio queue index in mq case
* @param mbuf_pool
* mbuf_pool where host mbuf is allocated.
- * @param queue_id
- * virtio queue index in mq case.
+ * @param pkts
+ * array to contain packets to be dequeued
+ * @param count
+ * packets num to be dequeued
* @return
* num of packets dequeued
*/