LXR qemu/include/hw/virtio/virtio-net.h

   1/*
   2 * Virtio Network Device
   3 *
   4 * Copyright IBM, Corp. 2007
   5 *
   6 * Authors:
   7 *  Anthony Liguori   <aliguori@us.ibm.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2.  See
  10 * the COPYING file in the top-level directory.
  11 *
  12 */
  13
  14#ifndef QEMU_VIRTIO_NET_H
  15#define QEMU_VIRTIO_NET_H
  16
  17#include "standard-headers/linux/virtio_net.h"
  18#include "hw/virtio/virtio.h"
  19
  20#define TYPE_VIRTIO_NET "virtio-net-device"
  21#define VIRTIO_NET(obj) \
  22        OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET)
  23
  24#define TX_TIMER_INTERVAL 150000 /* 150 us */
  25
  26/* Limit the number of packets that can be sent via a single flush
  27 * of the TX queue.  This gives us a guaranteed exit condition and
  28 * ensures fairness in the io path.  256 conveniently matches the
  29 * length of the TX queue and shows a good balance of performance
  30 * and latency. */
  31#define TX_BURST 256
  32
  33typedef struct virtio_net_conf
  34{
  35    uint32_t txtimer;
  36    int32_t txburst;
  37    char *tx;
  38    uint16_t rx_queue_size;
  39    uint16_t tx_queue_size;
  40    uint16_t mtu;
  41} virtio_net_conf;
  42
  43/* Maximum packet size we can receive from tap device: header + 64k */
  44#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
  45
  46typedef struct VirtIONetQueue {
  47    VirtQueue *rx_vq;
  48    VirtQueue *tx_vq;
  49    QEMUTimer *tx_timer;
  50    QEMUBH *tx_bh;
  51    uint32_t tx_waiting;
  52    struct {
  53        VirtQueueElement *elem;
  54    } async_tx;
  55    struct VirtIONet *n;
  56} VirtIONetQueue;
  57
  58typedef struct VirtIONet {
  59    VirtIODevice parent_obj;
  60    uint8_t mac[ETH_ALEN];
  61    uint16_t status;
  62    VirtIONetQueue *vqs;
  63    VirtQueue *ctrl_vq;
  64    NICState *nic;
  65    uint32_t tx_timeout;
  66    int32_t tx_burst;
  67    uint32_t has_vnet_hdr;
  68    size_t host_hdr_len;
  69    size_t guest_hdr_len;
  70    uint32_t host_features;
  71    uint8_t has_ufo;
  72    uint32_t mergeable_rx_bufs;
  73    uint8_t promisc;
  74    uint8_t allmulti;
  75    uint8_t alluni;
  76    uint8_t nomulti;
  77    uint8_t nouni;
  78    uint8_t nobcast;
  79    uint8_t vhost_started;
  80    struct {
  81        uint32_t in_use;
  82        uint32_t first_multi;
  83        uint8_t multi_overflow;
  84        uint8_t uni_overflow;
  85        uint8_t *macs;
  86    } mac_table;
  87    uint32_t *vlans;
  88    virtio_net_conf net_conf;
  89    NICConf nic_conf;
  90    DeviceState *qdev;
  91    int multiqueue;
  92    uint16_t max_queues;
  93    uint16_t curr_queues;
  94    size_t config_size;
  95    char *netclient_name;
  96    char *netclient_type;
  97    uint64_t curr_guest_offloads;
  98    QEMUTimer *announce_timer;
  99    int announce_counter;
 100    bool needs_vnet_hdr_swap;
 101    bool mtu_bypass_backend;
 102} VirtIONet;
 103
 104void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
 105                                   const char *type);
 106
 107#endif
 108