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 mtu;
  40} virtio_net_conf;
  41
  42/* Maximum packet size we can receive from tap device: header + 64k */
  43#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
  44
  45typedef struct VirtIONetQueue {
  46    VirtQueue *rx_vq;
  47    VirtQueue *tx_vq;
  48    QEMUTimer *tx_timer;
  49    QEMUBH *tx_bh;
  50    uint32_t tx_waiting;
  51    struct {
  52        VirtQueueElement *elem;
  53    } async_tx;
  54    struct VirtIONet *n;
  55} VirtIONetQueue;
  56
  57typedef struct VirtIONet {
  58    VirtIODevice parent_obj;
  59    uint8_t mac[ETH_ALEN];
  60    uint16_t status;
  61    VirtIONetQueue *vqs;
  62    VirtQueue *ctrl_vq;
  63    NICState *nic;
  64    uint32_t tx_timeout;
  65    int32_t tx_burst;
  66    uint32_t has_vnet_hdr;
  67    size_t host_hdr_len;
  68    size_t guest_hdr_len;
  69    uint32_t host_features;
  70    uint8_t has_ufo;
  71    uint32_t mergeable_rx_bufs;
  72    uint8_t promisc;
  73    uint8_t allmulti;
  74    uint8_t alluni;
  75    uint8_t nomulti;
  76    uint8_t nouni;
  77    uint8_t nobcast;
  78    uint8_t vhost_started;
  79    struct {
  80        uint32_t in_use;
  81        uint32_t first_multi;
  82        uint8_t multi_overflow;
  83        uint8_t uni_overflow;
  84        uint8_t *macs;
  85    } mac_table;
  86    uint32_t *vlans;
  87    virtio_net_conf net_conf;
  88    NICConf nic_conf;
  89    DeviceState *qdev;
  90    int multiqueue;
  91    uint16_t max_queues;
  92    uint16_t curr_queues;
  93    size_t config_size;
  94    char *netclient_name;
  95    char *netclient_type;
  96    uint64_t curr_guest_offloads;
  97    QEMUTimer *announce_timer;
  98    int announce_counter;
  99    bool needs_vnet_hdr_swap;
 100} VirtIONet;
 101
 102void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
 103                                   const char *type);
 104
 105#endif
 106