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 #include "net/announce.h" 21 #include "qemu/option_int.h" 22 23 #define TYPE_VIRTIO_NET "virtio-net-device" 24 #define VIRTIO_NET(obj) \ 25 OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET) 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 uint16_t rx_queue_size; 42 uint16_t tx_queue_size; 43 uint16_t mtu; 44 int32_t speed; 45 char *duplex_str; 46 uint8_t duplex; 47 char *primary_id_str; 48 } virtio_net_conf; 49 50 /* Coalesced packets type & status */ 51 typedef enum { 52 RSC_COALESCE, /* Data been coalesced */ 53 RSC_FINAL, /* Will terminate current connection */ 54 RSC_NO_MATCH, /* No matched in the buffer pool */ 55 RSC_BYPASS, /* Packet to be bypass, not tcp, tcp ctrl, etc */ 56 RSC_CANDIDATE /* Data want to be coalesced */ 57 } CoalesceStatus; 58 59 typedef struct VirtioNetRscStat { 60 uint32_t received; 61 uint32_t coalesced; 62 uint32_t over_size; 63 uint32_t cache; 64 uint32_t empty_cache; 65 uint32_t no_match_cache; 66 uint32_t win_update; 67 uint32_t no_match; 68 uint32_t tcp_syn; 69 uint32_t tcp_ctrl_drain; 70 uint32_t dup_ack; 71 uint32_t dup_ack1; 72 uint32_t dup_ack2; 73 uint32_t pure_ack; 74 uint32_t ack_out_of_win; 75 uint32_t data_out_of_win; 76 uint32_t data_out_of_order; 77 uint32_t data_after_pure_ack; 78 uint32_t bypass_not_tcp; 79 uint32_t tcp_option; 80 uint32_t tcp_all_opt; 81 uint32_t ip_frag; 82 uint32_t ip_ecn; 83 uint32_t ip_hacked; 84 uint32_t ip_option; 85 uint32_t purge_failed; 86 uint32_t drain_failed; 87 uint32_t final_failed; 88 int64_t timer; 89 } VirtioNetRscStat; 90 91 /* Rsc unit general info used to checking if can coalescing */ 92 typedef struct VirtioNetRscUnit { 93 void *ip; /* ip header */ 94 uint16_t *ip_plen; /* data len pointer in ip header field */ 95 struct tcp_header *tcp; /* tcp header */ 96 uint16_t tcp_hdrlen; /* tcp header len */ 97 uint16_t payload; /* pure payload without virtio/eth/ip/tcp */ 98 } VirtioNetRscUnit; 99 100 /* Coalesced segment */ 101 typedef struct VirtioNetRscSeg { 102 QTAILQ_ENTRY(VirtioNetRscSeg) next; 103 void *buf; 104 size_t size; 105 uint16_t packets; 106 uint16_t dup_ack; 107 bool is_coalesced; /* need recal ipv4 header checksum, mark here */ 108 VirtioNetRscUnit unit; 109 NetClientState *nc; 110 } VirtioNetRscSeg; 111 112 typedef struct VirtIONet VirtIONet; 113 114 /* Chain is divided by protocol(ipv4/v6) and NetClientInfo */ 115 typedef struct VirtioNetRscChain { 116 QTAILQ_ENTRY(VirtioNetRscChain) next; 117 VirtIONet *n; /* VirtIONet */ 118 uint16_t proto; 119 uint8_t gso_type; 120 uint16_t max_payload; 121 QEMUTimer *drain_timer; 122 QTAILQ_HEAD(, VirtioNetRscSeg) buffers; 123 VirtioNetRscStat stat; 124 } VirtioNetRscChain; 125 126 /* Maximum packet size we can receive from tap device: header + 64k */ 127 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 * KiB)) 128 129 typedef struct VirtIONetQueue { 130 VirtQueue *rx_vq; 131 VirtQueue *tx_vq; 132 QEMUTimer *tx_timer; 133 QEMUBH *tx_bh; 134 uint32_t tx_waiting; 135 struct { 136 VirtQueueElement *elem; 137 } async_tx; 138 struct VirtIONet *n; 139 } VirtIONetQueue; 140 141 struct VirtIONet { 142 VirtIODevice parent_obj; 143 uint8_t mac[ETH_ALEN]; 144 uint16_t status; 145 VirtIONetQueue *vqs; 146 VirtQueue *ctrl_vq; 147 NICState *nic; 148 /* RSC Chains - temporary storage of coalesced data, 149 all these data are lost in case of migration */ 150 QTAILQ_HEAD(, VirtioNetRscChain) rsc_chains; 151 uint32_t tx_timeout; 152 int32_t tx_burst; 153 uint32_t has_vnet_hdr; 154 size_t host_hdr_len; 155 size_t guest_hdr_len; 156 uint64_t host_features; 157 uint32_t rsc_timeout; 158 uint8_t rsc4_enabled; 159 uint8_t rsc6_enabled; 160 uint8_t has_ufo; 161 uint32_t mergeable_rx_bufs; 162 uint8_t promisc; 163 uint8_t allmulti; 164 uint8_t alluni; 165 uint8_t nomulti; 166 uint8_t nouni; 167 uint8_t nobcast; 168 uint8_t vhost_started; 169 struct { 170 uint32_t in_use; 171 uint32_t first_multi; 172 uint8_t multi_overflow; 173 uint8_t uni_overflow; 174 uint8_t *macs; 175 } mac_table; 176 uint32_t *vlans; 177 virtio_net_conf net_conf; 178 NICConf nic_conf; 179 DeviceState *qdev; 180 int multiqueue; 181 uint16_t max_queues; 182 uint16_t curr_queues; 183 size_t config_size; 184 char *netclient_name; 185 char *netclient_type; 186 uint64_t curr_guest_offloads; 187 /* used on saved state restore phase to preserve the curr_guest_offloads */ 188 uint64_t saved_guest_offloads; 189 AnnounceTimer announce_timer; 190 bool needs_vnet_hdr_swap; 191 bool mtu_bypass_backend; 192 QemuOpts *primary_device_opts; 193 QDict *primary_device_dict; 194 DeviceState *primary_dev; 195 BusState *primary_bus; 196 char *primary_device_id; 197 char *standby_id; 198 bool primary_should_be_hidden; 199 bool failover; 200 DeviceListener primary_listener; 201 Notifier migration_state; 202 }; 203 204 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 205 const char *type); 206 207 #endif 208