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