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 112