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} virtio_net_conf;
  40
  41/* Maximum packet size we can receive from tap device: header + 64k */
  42#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
  43
  44typedef struct VirtIONetQueue {
  45    VirtQueue *rx_vq;
  46    VirtQueue *tx_vq;
  47    QEMUTimer *tx_timer;
  48    QEMUBH *tx_bh;
  49    int tx_waiting;
  50    struct {
  51        VirtQueueElement *elem;
  52    } async_tx;
  53    struct VirtIONet *n;
  54} VirtIONetQueue;
  55
  56typedef struct VirtIONet {
  57    VirtIODevice parent_obj;
  58    uint8_t mac[ETH_ALEN];
  59    uint16_t status;
  60    VirtIONetQueue *vqs;
  61    VirtQueue *ctrl_vq;
  62    NICState *nic;
  63    uint32_t tx_timeout;
  64    int32_t tx_burst;
  65    uint32_t has_vnet_hdr;
  66    size_t host_hdr_len;
  67    size_t guest_hdr_len;
  68    uint32_t host_features;
  69    uint8_t has_ufo;
  70    int mergeable_rx_bufs;
  71    uint8_t promisc;
  72    uint8_t allmulti;
  73    uint8_t alluni;
  74    uint8_t nomulti;
  75    uint8_t nouni;
  76    uint8_t nobcast;
  77    uint8_t vhost_started;
  78    struct {
  79        uint32_t in_use;
  80        uint32_t first_multi;
  81        uint8_t multi_overflow;
  82        uint8_t uni_overflow;
  83        uint8_t *macs;
  84    } mac_table;
  85    uint32_t *vlans;
  86    virtio_net_conf net_conf;
  87    NICConf nic_conf;
  88    DeviceState *qdev;
  89    int multiqueue;
  90    uint16_t max_queues;
  91    uint16_t curr_queues;
  92    size_t config_size;
  93    char *netclient_name;
  94    char *netclient_type;
  95    uint64_t curr_guest_offloads;
  96    QEMUTimer *announce_timer;
  97    int announce_counter;
  98    bool needs_vnet_hdr_swap;
  99} VirtIONet;
 100
 101void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
 102                                   const char *type);
 103
 104#endif
 105