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 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS 2 /* Control channel offload 25 * configuration support */ 26 27 #define TX_TIMER_INTERVAL 150000 /* 150 us */ 28 29 /* Limit the number of packets that can be sent via a single flush 30 * of the TX queue. This gives us a guaranteed exit condition and 31 * ensures fairness in the io path. 256 conveniently matches the 32 * length of the TX queue and shows a good balance of performance 33 * and latency. */ 34 #define TX_BURST 256 35 36 typedef struct virtio_net_conf 37 { 38 uint32_t txtimer; 39 int32_t txburst; 40 char *tx; 41 } virtio_net_conf; 42 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)) 45 46 typedef struct VirtIONetQueue { 47 VirtQueue *rx_vq; 48 VirtQueue *tx_vq; 49 QEMUTimer *tx_timer; 50 QEMUBH *tx_bh; 51 int tx_waiting; 52 struct { 53 VirtQueueElement elem; 54 ssize_t len; 55 } async_tx; 56 struct VirtIONet *n; 57 } VirtIONetQueue; 58 59 typedef struct VirtIONet { 60 VirtIODevice parent_obj; 61 uint8_t mac[ETH_ALEN]; 62 uint16_t status; 63 VirtIONetQueue *vqs; 64 VirtQueue *ctrl_vq; 65 NICState *nic; 66 uint32_t tx_timeout; 67 int32_t tx_burst; 68 uint32_t has_vnet_hdr; 69 size_t host_hdr_len; 70 size_t guest_hdr_len; 71 uint32_t host_features; 72 uint8_t has_ufo; 73 int mergeable_rx_bufs; 74 uint8_t promisc; 75 uint8_t allmulti; 76 uint8_t alluni; 77 uint8_t nomulti; 78 uint8_t nouni; 79 uint8_t nobcast; 80 uint8_t vhost_started; 81 struct { 82 uint32_t in_use; 83 uint32_t first_multi; 84 uint8_t multi_overflow; 85 uint8_t uni_overflow; 86 uint8_t *macs; 87 } mac_table; 88 uint32_t *vlans; 89 virtio_net_conf net_conf; 90 NICConf nic_conf; 91 DeviceState *qdev; 92 int multiqueue; 93 uint16_t max_queues; 94 uint16_t curr_queues; 95 size_t config_size; 96 char *netclient_name; 97 char *netclient_type; 98 uint64_t curr_guest_offloads; 99 QEMUTimer *announce_timer; 100 int announce_counter; 101 } VirtIONet; 102 103 /* 104 * Control network offloads 105 * 106 * Dynamic offloads are available with the 107 * VIRTIO_NET_F_CTRL_GUEST_OFFLOADS feature bit. 108 */ 109 #define VIRTIO_NET_CTRL_GUEST_OFFLOADS 5 110 #define VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET 0 111 112 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 113 const char *type); 114 115 #endif 116