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 mtu; 40 } virtio_net_conf; 41 42 /* Maximum packet size we can receive from tap device: header + 64k */ 43 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) 44 45 typedef struct VirtIONetQueue { 46 VirtQueue *rx_vq; 47 VirtQueue *tx_vq; 48 QEMUTimer *tx_timer; 49 QEMUBH *tx_bh; 50 uint32_t tx_waiting; 51 struct { 52 VirtQueueElement *elem; 53 } async_tx; 54 struct VirtIONet *n; 55 } VirtIONetQueue; 56 57 typedef struct VirtIONet { 58 VirtIODevice parent_obj; 59 uint8_t mac[ETH_ALEN]; 60 uint16_t status; 61 VirtIONetQueue *vqs; 62 VirtQueue *ctrl_vq; 63 NICState *nic; 64 uint32_t tx_timeout; 65 int32_t tx_burst; 66 uint32_t has_vnet_hdr; 67 size_t host_hdr_len; 68 size_t guest_hdr_len; 69 uint32_t host_features; 70 uint8_t has_ufo; 71 uint32_t mergeable_rx_bufs; 72 uint8_t promisc; 73 uint8_t allmulti; 74 uint8_t alluni; 75 uint8_t nomulti; 76 uint8_t nouni; 77 uint8_t nobcast; 78 uint8_t vhost_started; 79 struct { 80 uint32_t in_use; 81 uint32_t first_multi; 82 uint8_t multi_overflow; 83 uint8_t uni_overflow; 84 uint8_t *macs; 85 } mac_table; 86 uint32_t *vlans; 87 virtio_net_conf net_conf; 88 NICConf nic_conf; 89 DeviceState *qdev; 90 int multiqueue; 91 uint16_t max_queues; 92 uint16_t curr_queues; 93 size_t config_size; 94 char *netclient_name; 95 char *netclient_type; 96 uint64_t curr_guest_offloads; 97 QEMUTimer *announce_timer; 98 int announce_counter; 99 bool needs_vnet_hdr_swap; 100 bool mtu_bypass_backend; 101 } VirtIONet; 102 103 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 104 const char *type); 105 106 #endif 107