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     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
  46 typedef 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
  58 typedef 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
 104 void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
 105                                    const char *type);
 106
 107 #endif