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
  33 typedef 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
  44 typedef 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
  56 typedef 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
 101 void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
 102                                    const char *type);
 103
 104 #endif