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
  34 typedef 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
  50 typedef 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
  62 typedef 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
 108 void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
 109                                    const char *type);
 110
 111 #endif