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 } virtio_net_conf; 39 40 /* Maximum packet size we can receive from tap device: header + 64k */ 41 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) 42 43 typedef struct VirtIONetQueue { 44 VirtQueue *rx_vq; 45 VirtQueue *tx_vq; 46 QEMUTimer *tx_timer; 47 QEMUBH *tx_bh; 48 int tx_waiting; 49 struct { 50 VirtQueueElement *elem; 51 } async_tx; 52 struct VirtIONet *n; 53 } VirtIONetQueue; 54 55 typedef struct VirtIONet { 56 VirtIODevice parent_obj; 57 uint8_t mac[ETH_ALEN]; 58 uint16_t status; 59 VirtIONetQueue *vqs; 60 VirtQueue *ctrl_vq; 61 NICState *nic; 62 uint32_t tx_timeout; 63 int32_t tx_burst; 64 uint32_t has_vnet_hdr; 65 size_t host_hdr_len; 66 size_t guest_hdr_len; 67 uint32_t host_features; 68 uint8_t has_ufo; 69 int mergeable_rx_bufs; 70 uint8_t promisc; 71 uint8_t allmulti; 72 uint8_t alluni; 73 uint8_t nomulti; 74 uint8_t nouni; 75 uint8_t nobcast; 76 uint8_t vhost_started; 77 struct { 78 uint32_t in_use; 79 uint32_t first_multi; 80 uint8_t multi_overflow; 81 uint8_t uni_overflow; 82 uint8_t *macs; 83 } mac_table; 84 uint32_t *vlans; 85 virtio_net_conf net_conf; 86 NICConf nic_conf; 87 DeviceState *qdev; 88 int multiqueue; 89 uint16_t max_queues; 90 uint16_t curr_queues; 91 size_t config_size; 92 char *netclient_name; 93 char *netclient_type; 94 uint64_t curr_guest_offloads; 95 QEMUTimer *announce_timer; 96 int announce_counter; 97 } VirtIONet; 98 99 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 100 const char *type); 101 102 #endif 103