1 /* $NetBSD: if_fdir.c,v 1.6 2023/10/06 14:37:04 msaitoh Exp $ */ 2 /****************************************************************************** 3 4 Copyright (c) 2001-2017, Intel Corporation 5 All rights reserved. 6 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions are met: 9 10 1. Redistributions of source code must retain the above copyright notice, 11 this list of conditions and the following disclaimer. 12 13 2. Redistributions in binary form must reproduce the above copyright 14 notice, this list of conditions and the following disclaimer in the 15 documentation and/or other materials provided with the distribution. 16 17 3. Neither the name of the Intel Corporation nor the names of its 18 contributors may be used to endorse or promote products derived from 19 this software without specific prior written permission. 20 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 POSSIBILITY OF SUCH DAMAGE. 32 33 ******************************************************************************/ 34 /*$FreeBSD: head/sys/dev/ixgbe/if_fdir.c 327031 2017-12-20 18:15:06Z erj $*/ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: if_fdir.c,v 1.6 2023/10/06 14:37:04 msaitoh Exp $"); 38 39 #include "ixgbe.h" 40 41 #ifdef IXGBE_FDIR 42 43 void 44 ixgbe_init_fdir(struct ixgbe_softc *sc) 45 { 46 u32 hdrm = 32 << fdir_pballoc; 47 48 if (!(sc->feat_en & IXGBE_FEATURE_FDIR)) 49 return; 50 51 sc->hw.mac.ops.setup_rxpba(&sc->hw, 0, hdrm, 52 PBA_STRATEGY_EQUAL); 53 ixgbe_init_fdir_signature_82599(&sc->hw, fdir_pballoc); 54 } /* ixgbe_init_fdir */ 55 56 void 57 ixgbe_reinit_fdir(void *context) 58 { 59 struct ixgbe_softc *sc = context; 60 struct ifnet *ifp = sc->ifp; 61 62 KASSERT(mutex_owned(&sc->core_mtx)); 63 64 if (!(sc->feat_en & IXGBE_FEATURE_FDIR)) 65 return; 66 if (sc->fdir_reinit != 1) /* Shouldn't happen */ 67 return; 68 ixgbe_reinit_fdir_tables_82599(&sc->hw); 69 sc->fdir_reinit = 0; 70 /* re-enable flow director interrupts */ 71 IXGBE_WRITE_REG(&sc->hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR); 72 /* Restart the interface */ 73 ifp->if_drv_flags |= IFF_DRV_RUNNING; 74 } /* ixgbe_reinit_fdir */ 75 76 /************************************************************************ 77 * ixgbe_atr 78 * 79 * Parse packet headers so that Flow Director can make 80 * a hashed filter table entry allowing traffic flows 81 * to be identified and kept on the same cpu. This 82 * would be a performance hit, but we only do it at 83 * IXGBE_FDIR_RATE of packets. 84 ************************************************************************/ 85 void 86 ixgbe_atr(struct tx_ring *txr, struct mbuf *mp) 87 { 88 struct ixgbe_softc *sc = txr->sc; 89 struct ix_queue *que; 90 struct ip *ip; 91 struct tcphdr *th; 92 struct udphdr *uh; 93 struct ether_vlan_header *eh; 94 union ixgbe_atr_hash_dword input = {.dword = 0}; 95 union ixgbe_atr_hash_dword common = {.dword = 0}; 96 int ehdrlen, ip_hlen; 97 u16 etype; 98 99 eh = mtod(mp, struct ether_vlan_header *); 100 if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { 101 ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; 102 etype = eh->evl_proto; 103 } else { 104 ehdrlen = ETHER_HDR_LEN; 105 etype = eh->evl_encap_proto; 106 } 107 108 /* Only handling IPv4 */ 109 if (etype != htons(ETHERTYPE_IP)) 110 return; 111 112 ip = (struct ip *)(mp->m_data + ehdrlen); 113 ip_hlen = ip->ip_hl << 2; 114 115 /* check if we're UDP or TCP */ 116 switch (ip->ip_p) { 117 case IPPROTO_TCP: 118 th = (struct tcphdr *)((caddr_t)ip + ip_hlen); 119 /* src and dst are inverted */ 120 common.port.dst ^= th->th_sport; 121 common.port.src ^= th->th_dport; 122 input.formatted.flow_type ^= IXGBE_ATR_FLOW_TYPE_TCPV4; 123 break; 124 case IPPROTO_UDP: 125 uh = (struct udphdr *)((caddr_t)ip + ip_hlen); 126 /* src and dst are inverted */ 127 common.port.dst ^= uh->uh_sport; 128 common.port.src ^= uh->uh_dport; 129 input.formatted.flow_type ^= IXGBE_ATR_FLOW_TYPE_UDPV4; 130 break; 131 default: 132 return; 133 } 134 135 input.formatted.vlan_id = htobe16(mp->m_pkthdr.ether_vtag); 136 if (mp->m_pkthdr.ether_vtag) 137 common.flex_bytes ^= htons(ETHERTYPE_VLAN); 138 else 139 common.flex_bytes ^= etype; 140 common.ip ^= ip->ip_src.s_addr ^ ip->ip_dst.s_addr; 141 142 que = &sc->queues[txr->me]; 143 /* 144 * This assumes the Rx queue and Tx 145 * queue are bound to the same CPU 146 */ 147 ixgbe_fdir_add_signature_filter_82599(&sc->hw, 148 input, common, que->msix); 149 } /* ixgbe_atr */ 150 151 #else 152 153 /* TASK_INIT needs this function defined regardless if it's enabled */ 154 void 155 ixgbe_reinit_fdir(void *context) 156 { 157 UNREFERENCED_1PARAMETER(context); 158 } /* ixgbe_reinit_fdir */ 159 160 void 161 ixgbe_atr(struct tx_ring *txr, struct mbuf *mp) 162 { 163 UNREFERENCED_2PARAMETER(txr, mp); 164 } /* ixgbe_atr */ 165 166 #endif 167
Indexes created Sat Sep 27 22:09:54 GMT 2025