2 * Virtio Network Device
4 * Copyright IBM, Corp. 2007
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #ifndef QEMU_VIRTIO_NET_H
15 #define QEMU_VIRTIO_NET_H
17 #include "standard-headers/linux/virtio_net.h"
18 #include "hw/virtio/virtio.h"
20 #define TYPE_VIRTIO_NET "virtio-net-device"
21 #define VIRTIO_NET(obj) \
22 OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET)
24 #define TX_TIMER_INTERVAL 150000 /* 150 us */
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
33 typedef struct virtio_net_conf
38 uint16_t rx_queue_size
;
39 uint16_t tx_queue_size
;
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))
46 typedef struct VirtIONetQueue
{
53 VirtQueueElement
*elem
;
58 typedef struct VirtIONet
{
59 VirtIODevice parent_obj
;
60 uint8_t mac
[ETH_ALEN
];
67 uint32_t has_vnet_hdr
;
70 uint32_t host_features
;
72 uint32_t mergeable_rx_bufs
;
79 uint8_t vhost_started
;
83 uint8_t multi_overflow
;
88 virtio_net_conf net_conf
;
97 uint64_t curr_guest_offloads
;
98 QEMUTimer
*announce_timer
;
100 bool needs_vnet_hdr_swap
;
101 bool mtu_bypass_backend
;
104 void virtio_net_set_netclient_name(VirtIONet
*n
, const char *name
,