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 "qemu/units.h"
  18#include "standard-headers/linux/virtio_net.h"
  19#include "hw/virtio/virtio.h"
  20
  21#define TYPE_VIRTIO_NET "virtio-net-device"
  22#define VIRTIO_NET(obj) \
  23        OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET)
  24
  25#define TX_TIMER_INTERVAL 150000 /* 150 us */
  26
  27/* Limit the number of packets that can be sent via a single flush
  28 * of the TX queue.  This gives us a guaranteed exit condition and
  29 * ensures fairness in the io path.  256 conveniently matches the
  30 * length of the TX queue and shows a good balance of performance
  31 * and latency. */
  32#define TX_BURST 256
  33
  34typedef struct virtio_net_conf
  35{
  36    uint32_t txtimer;
  37    int32_t txburst;
  38    char *tx;
  39    uint16_t rx_queue_size;
  40    uint16_t tx_queue_size;
  41    uint16_t mtu;
  42    int32_t speed;
  43    char *duplex_str;
  44    uint8_t duplex;
  45} virtio_net_conf;
  46
  47/* Maximum packet size we can receive from tap device: header + 64k */
  48#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 * KiB))
  49
  50typedef struct VirtIONetQueue {
  51    VirtQueue *rx_vq;
  52    VirtQueue *tx_vq;
  53    QEMUTimer *tx_timer;
  54    QEMUBH *tx_bh;
  55    uint32_t tx_waiting;
  56    struct {
  57        VirtQueueElement *elem;
  58    } async_tx;
  59    struct VirtIONet *n;
  60} VirtIONetQueue;
  61
  62typedef struct VirtIONet {
  63    VirtIODevice parent_obj;
  64    uint8_t mac[ETH_ALEN];
  65    uint16_t status;
  66    VirtIONetQueue *vqs;
  67    VirtQueue *ctrl_vq;
  68    NICState *nic;
  69    uint32_t tx_timeout;
  70    int32_t tx_burst;
  71    uint32_t has_vnet_hdr;
  72    size_t host_hdr_len;
  73    size_t guest_hdr_len;
  74    uint64_t host_features;
  75    uint8_t has_ufo;
  76    uint32_t mergeable_rx_bufs;
  77    uint8_t promisc;
  78    uint8_t allmulti;
  79    uint8_t alluni;
  80    uint8_t nomulti;
  81    uint8_t nouni;
  82    uint8_t nobcast;
  83    uint8_t vhost_started;
  84    struct {
  85        uint32_t in_use;
  86        uint32_t first_multi;
  87        uint8_t multi_overflow;
  88        uint8_t uni_overflow;
  89        uint8_t *macs;
  90    } mac_table;
  91    uint32_t *vlans;
  92    virtio_net_conf net_conf;
  93    NICConf nic_conf;
  94    DeviceState *qdev;
  95    int multiqueue;
  96    uint16_t max_queues;
  97    uint16_t curr_queues;
  98    size_t config_size;
  99    char *netclient_name;
 100    char *netclient_type;
 101    uint64_t curr_guest_offloads;
 102    QEMUTimer *announce_timer;
 103    int announce_counter;
 104    bool needs_vnet_hdr_swap;
 105    bool mtu_bypass_backend;
 106} VirtIONet;
 107
 108void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
 109                                   const char *type);
 110
 111#endif
 112