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/*-
* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _TCP_TLRO_H_
#define _TCP_TLRO_H_
#define TLRO_MAX_HEADER 64 /* bytes */
struct ip;
struct ip6_hdr;
struct tcphdr;
struct tlro_mbuf_data {
union {
#ifdef INET
struct ip *v4;
#endif
#ifdef INET6
struct ip6_hdr *v6;
#endif
} ip;
struct tcphdr *tcp;
struct mbuf *head;
struct mbuf **pprev;
int last_tick;
int sequence;
int data_len;
int data_off;
int ip_hdrlen;
int ip_len;
uint32_t tcp_ts;
uint32_t tcp_ts_reply;
uint16_t tcp_len;
uint8_t ip_version;
uint8_t buf_length; /* in 32-bit words */
uint64_t buf[TLRO_MAX_HEADER / 8];
} __aligned(256);
struct tlro_mbuf_ptr {
struct tlro_mbuf_data *data;
};
/* NB: This is part of driver structs */
struct tlro_ctrl {
struct ifnet *ifp;
struct tlro_mbuf_ptr *mbuf;
uint64_t lro_queued;
uint64_t lro_flushed;
uint32_t max;
uint32_t curr;
int sequence;
};
int tcp_tlro_init(struct tlro_ctrl *, struct ifnet *, int);
void tcp_tlro_free(struct tlro_ctrl *);
void tcp_tlro_flush(struct tlro_ctrl *, int);
void tcp_tlro_rx(struct tlro_ctrl *, struct mbuf *);
#endif /* _TCP_TLRO_H_ */
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