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/*
* QEMU VMWARE VMXNET* paravirtual NICs - TX packets abstraction
*
* Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
*
* Developed by Daynix Computing LTD (http://www.daynix.com)
*
* Authors:
* Dmitry Fleytman <dmitry@daynix.com>
* Tamir Shomer <tamirs@daynix.com>
* Yan Vugenfirer <yan@daynix.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef VMXNET_TX_PKT_H
#define VMXNET_TX_PKT_H
#include "stdint.h"
#include "stdbool.h"
#include "net/eth.h"
#include "exec/hwaddr.h"
/* define to enable packet dump functions */
/*#define VMXNET_TX_PKT_DEBUG*/
struct VmxnetTxPkt;
/**
* Init function for tx packet functionality
*
* @pkt: packet pointer
* @max_frags: max tx ip fragments
* @has_virt_hdr: device uses virtio header.
*/
void vmxnet_tx_pkt_init(struct VmxnetTxPkt **pkt, uint32_t max_frags,
bool has_virt_hdr);
/**
* Clean all tx packet resources.
*
* @pkt: packet.
*/
void vmxnet_tx_pkt_uninit(struct VmxnetTxPkt *pkt);
/**
* get virtio header
*
* @pkt: packet
* @ret: virtio header
*/
struct virtio_net_hdr *vmxnet_tx_pkt_get_vhdr(struct VmxnetTxPkt *pkt);
/**
* build virtio header (will be stored in module context)
*
* @pkt: packet
* @tso_enable: TSO enabled
* @csum_enable: CSO enabled
* @gso_size: MSS size for TSO
*
*/
void vmxnet_tx_pkt_build_vheader(struct VmxnetTxPkt *pkt, bool tso_enable,
bool csum_enable, uint32_t gso_size);
/**
* updates vlan tag, and adds vlan header in case it is missing
*
* @pkt: packet
* @vlan: VLAN tag
*
*/
void vmxnet_tx_pkt_setup_vlan_header(struct VmxnetTxPkt *pkt, uint16_t vlan);
/**
* populate data fragment into pkt context.
*
* @pkt: packet
* @pa: physical address of fragment
* @len: length of fragment
*
*/
bool vmxnet_tx_pkt_add_raw_fragment(struct VmxnetTxPkt *pkt, hwaddr pa,
size_t len);
/**
* fix ip header fields and calculate checksums needed.
*
* @pkt: packet
*
*/
void vmxnet_tx_pkt_update_ip_checksums(struct VmxnetTxPkt *pkt);
/**
* get length of all populated data.
*
* @pkt: packet
* @ret: total data length
*
*/
size_t vmxnet_tx_pkt_get_total_len(struct VmxnetTxPkt *pkt);
/**
* get packet type
*
* @pkt: packet
* @ret: packet type
*
*/
eth_pkt_types_e vmxnet_tx_pkt_get_packet_type(struct VmxnetTxPkt *pkt);
/**
* prints packet data if debug is enabled
*
* @pkt: packet
*
*/
void vmxnet_tx_pkt_dump(struct VmxnetTxPkt *pkt);
/**
* reset tx packet private context (needed to be called between packets)
*
* @pkt: packet
*
*/
void vmxnet_tx_pkt_reset(struct VmxnetTxPkt *pkt);
/**
* Send packet to qemu. handles sw offloads if vhdr is not supported.
*
* @pkt: packet
* @nc: NetClientState
* @ret: operation result
*
*/
bool vmxnet_tx_pkt_send(struct VmxnetTxPkt *pkt, NetClientState *nc);
/**
* parse raw packet data and analyze offload requirements.
*
* @pkt: packet
*
*/
bool vmxnet_tx_pkt_parse(struct VmxnetTxPkt *pkt);
#endif
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