/* * Virtio Network Device * * Copyright IBM, Corp. 2007 * * Authors: * Anthony Liguori * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * */ #ifndef QEMU_VIRTIO_NET_H #define QEMU_VIRTIO_NET_H #include "qemu/units.h" #include "standard-headers/linux/virtio_net.h" #include "hw/virtio/virtio.h" #define TYPE_VIRTIO_NET "virtio-net-device" #define VIRTIO_NET(obj) \ OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET) #define TX_TIMER_INTERVAL 150000 /* 150 us */ /* Limit the number of packets that can be sent via a single flush * of the TX queue. This gives us a guaranteed exit condition and * ensures fairness in the io path. 256 conveniently matches the * length of the TX queue and shows a good balance of performance * and latency. */ #define TX_BURST 256 typedef struct virtio_net_conf { uint32_t txtimer; int32_t txburst; char *tx; uint16_t rx_queue_size; uint16_t tx_queue_size; uint16_t mtu; int32_t speed; char *duplex_str; uint8_t duplex; } virtio_net_conf; /* Coalesced packets type & status */ typedef enum { RSC_COALESCE, /* Data been coalesced */ RSC_FINAL, /* Will terminate current connection */ RSC_NO_MATCH, /* No matched in the buffer pool */ RSC_BYPASS, /* Packet to be bypass, not tcp, tcp ctrl, etc */ RSC_CANDIDATE /* Data want to be coalesced */ } CoalesceStatus; typedef struct VirtioNetRscStat { uint32_t received; uint32_t coalesced; uint32_t over_size; uint32_t cache; uint32_t empty_cache; uint32_t no_match_cache; uint32_t win_update; uint32_t no_match; uint32_t tcp_syn; uint32_t tcp_ctrl_drain; uint32_t dup_ack; uint32_t dup_ack1; uint32_t dup_ack2; uint32_t pure_ack; uint32_t ack_out_of_win; uint32_t data_out_of_win; uint32_t data_out_of_order; uint32_t data_after_pure_ack; uint32_t bypass_not_tcp; uint32_t tcp_option; uint32_t tcp_all_opt; uint32_t ip_frag; uint32_t ip_ecn; uint32_t ip_hacked; uint32_t ip_option; uint32_t purge_failed; uint32_t drain_failed; uint32_t final_failed; int64_t timer; } VirtioNetRscStat; /* Rsc unit general info used to checking if can coalescing */ typedef struct VirtioNetRscUnit { void *ip; /* ip header */ uint16_t *ip_plen; /* data len pointer in ip header field */ struct tcp_header *tcp; /* tcp header */ uint16_t tcp_hdrlen; /* tcp header len */ uint16_t payload; /* pure payload without virtio/eth/ip/tcp */ } VirtioNetRscUnit; /* Coalesced segmant */ typedef struct VirtioNetRscSeg { QTAILQ_ENTRY(VirtioNetRscSeg) next; void *buf; size_t size; uint16_t packets; uint16_t dup_ack; bool is_coalesced; /* need recal ipv4 header checksum, mark here */ VirtioNetRscUnit unit; NetClientState *nc; } VirtioNetRscSeg; struct VirtIONet; typedef struct VirtIONet VirtIONet; /* Chain is divided by protocol(ipv4/v6) and NetClientInfo */ typedef struct VirtioNetRscChain { QTAILQ_ENTRY(VirtioNetRscChain) next; VirtIONet *n; /* VirtIONet */ uint16_t proto; uint8_t gso_type; uint16_t max_payload; QEMUTimer *drain_timer; QTAILQ_HEAD(, VirtioNetRscSeg) buffers; VirtioNetRscStat stat; } VirtioNetRscChain; /* Maximum packet size we can receive from tap device: header + 64k */ #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 * KiB)) typedef struct VirtIONetQueue { VirtQueue *rx_vq; VirtQueue *tx_vq; QEMUTimer *tx_timer; QEMUBH *tx_bh; uint32_t tx_waiting; struct { VirtQueueElement *elem; } async_tx; struct VirtIONet *n; } VirtIONetQueue; typedef struct VirtIONet { VirtIODevice parent_obj; uint8_t mac[ETH_ALEN]; uint16_t status; VirtIONetQueue *vqs; VirtQueue *ctrl_vq; NICState *nic; /* RSC Chains - temporary storage of coalesced data, all these data are lost in case of migration */ QTAILQ_HEAD(, VirtioNetRscChain) rsc_chains; uint32_t tx_timeout; int32_t tx_burst; uint32_t has_vnet_hdr; size_t host_hdr_len; size_t guest_hdr_len; uint64_t host_features; uint32_t rsc_timeout; uint8_t rsc4_enabled; uint8_t rsc6_enabled; uint8_t has_ufo; uint32_t mergeable_rx_bufs; uint8_t promisc; uint8_t allmulti; uint8_t alluni; uint8_t nomulti; uint8_t nouni; uint8_t nobcast; uint8_t vhost_started; struct { uint32_t in_use; uint32_t first_multi; uint8_t multi_overflow; uint8_t uni_overflow; uint8_t *macs; } mac_table; uint32_t *vlans; virtio_net_conf net_conf; NICConf nic_conf; DeviceState *qdev; int multiqueue; uint16_t max_queues; uint16_t curr_queues; size_t config_size; char *netclient_name; char *netclient_type; uint64_t curr_guest_offloads; QEMUTimer *announce_timer; int announce_counter; bool needs_vnet_hdr_swap; bool mtu_bypass_backend; } VirtIONet; void virtio_net_set_netclient_name(VirtIONet *n, const char *name, const char *type); #endif