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
22#define TYPE_VIRTIO_NET "virtio-net-device"
23#define VIRTIO_NET(obj) \
24 OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET)
25
26#define TX_TIMER_INTERVAL 150000 /* 150 us */
27
28/* Limit the number of packets that can be sent via a single flush
29 * of the TX queue. This gives us a guaranteed exit condition and
30 * ensures fairness in the io path. 256 conveniently matches the
31 * length of the TX queue and shows a good balance of performance
32 * and latency. */
33#define TX_BURST 256
34
35typedef struct virtio_net_conf
36{
37 uint32_t txtimer;
38 int32_t txburst;
39 char *tx;
40 uint16_t rx_queue_size;
41 uint16_t tx_queue_size;
42 uint16_t mtu;
43 int32_t speed;
44 char *duplex_str;
45 uint8_t duplex;
46} virtio_net_conf;
47
48/* Coalesced packets type & status */
49typedef enum {
50 RSC_COALESCE, /* Data been coalesced */
51 RSC_FINAL, /* Will terminate current connection */
52 RSC_NO_MATCH, /* No matched in the buffer pool */
53 RSC_BYPASS, /* Packet to be bypass, not tcp, tcp ctrl, etc */
54 RSC_CANDIDATE /* Data want to be coalesced */
55} CoalesceStatus;
56
57typedef struct VirtioNetRscStat {
58 uint32_t received;
59 uint32_t coalesced;
60 uint32_t over_size;
61 uint32_t cache;
62 uint32_t empty_cache;
63 uint32_t no_match_cache;
64 uint32_t win_update;
65 uint32_t no_match;
66 uint32_t tcp_syn;
67 uint32_t tcp_ctrl_drain;
68 uint32_t dup_ack;
69 uint32_t dup_ack1;
70 uint32_t dup_ack2;
71 uint32_t pure_ack;
72 uint32_t ack_out_of_win;
73 uint32_t data_out_of_win;
74 uint32_t data_out_of_order;
75 uint32_t data_after_pure_ack;
76 uint32_t bypass_not_tcp;
77 uint32_t tcp_option;
78 uint32_t tcp_all_opt;
79 uint32_t ip_frag;
80 uint32_t ip_ecn;
81 uint32_t ip_hacked;
82 uint32_t ip_option;
83 uint32_t purge_failed;
84 uint32_t drain_failed;
85 uint32_t final_failed;
86 int64_t timer;
87} VirtioNetRscStat;
88
89/* Rsc unit general info used to checking if can coalescing */
90typedef struct VirtioNetRscUnit {
91 void *ip; /* ip header */
92 uint16_t *ip_plen; /* data len pointer in ip header field */
93 struct tcp_header *tcp; /* tcp header */
94 uint16_t tcp_hdrlen; /* tcp header len */
95 uint16_t payload; /* pure payload without virtio/eth/ip/tcp */
96} VirtioNetRscUnit;
97
98/* Coalesced segment */
99typedef struct VirtioNetRscSeg {
100 QTAILQ_ENTRY(VirtioNetRscSeg) next;
101 void *buf;
102 size_t size;
103 uint16_t packets;
104 uint16_t dup_ack;
105 bool is_coalesced; /* need recal ipv4 header checksum, mark here */
106 VirtioNetRscUnit unit;
107 NetClientState *nc;
108} VirtioNetRscSeg;
109
110typedef struct VirtIONet VirtIONet;
111
112/* Chain is divided by protocol(ipv4/v6) and NetClientInfo */
113typedef struct VirtioNetRscChain {
114 QTAILQ_ENTRY(VirtioNetRscChain) next;
115 VirtIONet *n; /* VirtIONet */
116 uint16_t proto;
117 uint8_t gso_type;
118 uint16_t max_payload;
119 QEMUTimer *drain_timer;
120 QTAILQ_HEAD(, VirtioNetRscSeg) buffers;
121 VirtioNetRscStat stat;
122} VirtioNetRscChain;
123
124/* Maximum packet size we can receive from tap device: header + 64k */
125#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 * KiB))
126
127typedef struct VirtIONetQueue {
128 VirtQueue *rx_vq;
129 VirtQueue *tx_vq;
130 QEMUTimer *tx_timer;
131 QEMUBH *tx_bh;
132 uint32_t tx_waiting;
133 struct {
134 VirtQueueElement *elem;
135 } async_tx;
136 struct VirtIONet *n;
137} VirtIONetQueue;
138
139struct VirtIONet {
140 VirtIODevice parent_obj;
141 uint8_t mac[ETH_ALEN];
142 uint16_t status;
143 VirtIONetQueue *vqs;
144 VirtQueue *ctrl_vq;
145 NICState *nic;
146 /* RSC Chains - temporary storage of coalesced data,
147 all these data are lost in case of migration */
148 QTAILQ_HEAD(, VirtioNetRscChain) rsc_chains;
149 uint32_t tx_timeout;
150 int32_t tx_burst;
151 uint32_t has_vnet_hdr;
152 size_t host_hdr_len;
153 size_t guest_hdr_len;
154 uint64_t host_features;
155 uint32_t rsc_timeout;
156 uint8_t rsc4_enabled;
157 uint8_t rsc6_enabled;
158 uint8_t has_ufo;
159 uint32_t mergeable_rx_bufs;
160 uint8_t promisc;
161 uint8_t allmulti;
162 uint8_t alluni;
163 uint8_t nomulti;
164 uint8_t nouni;
165 uint8_t nobcast;
166 uint8_t vhost_started;
167 struct {
168 uint32_t in_use;
169 uint32_t first_multi;
170 uint8_t multi_overflow;
171 uint8_t uni_overflow;
172 uint8_t *macs;
173 } mac_table;
174 uint32_t *vlans;
175 virtio_net_conf net_conf;
176 NICConf nic_conf;
177 DeviceState *qdev;
178 int multiqueue;
179 uint16_t max_queues;
180 uint16_t curr_queues;
181 size_t config_size;
182 char *netclient_name;
183 char *netclient_type;
184 uint64_t curr_guest_offloads;
185 AnnounceTimer announce_timer;
186 bool needs_vnet_hdr_swap;
187 bool mtu_bypass_backend;
188};
189
190void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
191 const char *type);
192
193#endif
194