1 /* $NetBSD: ether_sw_offload.h,v 1.1 2018/12/12 01:40:20 rin Exp $ */ 2 3 /* 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Rin Okuyama. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _NET_ETHER_SW_OFFLOAD_H_ 33 #define _NET_ETHER_SW_OFFLOAD_H_ 34 35 #ifdef _KERNEL 36 #include <sys/mbuf.h> 37 #include <net/if.h> 38 39 /* 40 * Whether given TX offload options are supported by the interface. 41 * We need to check TSO bits first; M_CSUM_IPv4 is turned on even if 42 * TSOv4 is enabled (and some drivers depend on this behavior). 43 * Therefore we cannot test 44 * m->m_pkthdr.csum_flags & ~ifp->if_csum_flags_tx 45 * for interfaces that do not support hw IPv4 checksum. 46 */ 47 #define TX_OFFLOAD_SUPPORTED(if_flags, mbuf_flags) \ 48 ((((mbuf_flags) & (M_CSUM_TSOv4 | M_CSUM_TSOv6)) & (if_flags)) || \ 49 !((mbuf_flags) & ~(if_flags))) 50 51 struct mbuf *ether_sw_offload_tx(struct ifnet *, struct mbuf *); 52 struct mbuf *ether_sw_offload_rx(struct ifnet *, struct mbuf *); 53 #endif /* _KERNEL */ 54 55 #endif /* !_NET_ETHER_SW_OFFLOAD_H_ */ 56